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{
/***************************************************************************
forms.pp
--------
Component Library Code
Initial Revision : Sun Mar 28 23:15:32 CST 1999
Revised : Sat Jul 15 1999
***************************************************************************/
*****************************************************************************
This file is part of the Lazarus Component Library (LCL)
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
}
unit Forms;
{$mode objfpc}{$H+}{$macro on}
{$I lcl_defines.inc}
interface
{$ifdef Trace}
{$ASSERTIONS ON}
{$endif}
{$DEFINE HasDefaultValues}
uses
// RTL + FCL
Classes, SysUtils, Types, TypInfo, Math, CustApp,
// LCL
LCLStrConsts, LCLType, LCLProc, LCLIntf, LCLVersion, LCLClasses, InterfaceBase,
LResources, GraphType, Graphics, Menus, LMessages, CustomTimer, ActnList,
ClipBrd, HelpIntfs, Controls, ImgList, Themes,
// LazUtils
LazFileUtils, LazUTF8, Maps, IntegerList, LazMethodList, LazLoggerBase,
LazUtilities, UITypes
{$ifndef wince},gettext{$endif}// remove ifdefs when gettext is fixed and a new fpc is released
;
type
// forward class declarations
TIDesigner = class;
TMonitor = class;
TScrollingWinControl = class;
TProcedure = procedure;
TProcedureOfObject = procedure of object;
// form position policies:
TPosition = (
poDesigned, // use bounds from the designer (read from stream)
poDefault, // LCL decision (normally window manager decides)
poDefaultPosOnly, // designed size and LCL position
poDefaultSizeOnly, // designed position and LCL size
poScreenCenter, // center form on screen (depends on DefaultMonitor)
poDesktopCenter, // center form on desktop (total of all screens)
poMainFormCenter, // center form on main form (depends on DefaultMonitor)
poOwnerFormCenter, // center form on owner form (depends on DefaultMonitor)
poWorkAreaCenter // center form on working area (depends on DefaultMonitor)
);
TWindowState = (wsNormal, wsMinimized, wsMaximized, wsFullScreen);
TCloseAction = (caNone, caHide, caFree, caMinimize);
{ Hint actions }
TCustomHintAction = class(TCustomAction)
published
property Hint;
end;
{ TControlScrollBar }
TScrollBarKind = (sbHorizontal, sbVertical);
TScrollBarInc = 1..32768;
TScrollBarStyle = (ssRegular, ssFlat, ssHotTrack);
EScrollBar = class(Exception) end;
TControlScrollBar = class(TPersistent)
private
FAutoRange: Longint; // = Max(0, FRange - ClientSize)
FIncrement: TScrollBarInc;
FKind: TScrollBarKind;
FPage: TScrollBarInc;
FRange: Integer; // if AutoScroll=true this is the needed size of the child controls
FSmooth: Boolean;
FTracking: Boolean;
FVisible: Boolean;
FOldScrollInfo: TScrollInfo;
FOldScrollInfoValid: Boolean;
protected
FControl: TWinControl;
FPosition: Integer;
function ControlHandle: HWnd; virtual;
function GetAutoScroll: boolean; virtual;
function GetIncrement: TScrollBarInc; virtual;
function GetPage: TScrollBarInc; virtual;
function GetPosition: Integer; virtual;
function GetRange: Integer; virtual;
function GetSize: integer; virtual;
function GetSmooth: Boolean; virtual;
function HandleAllocated: boolean; virtual;
function IsRangeStored: boolean; virtual;
procedure ControlUpdateScrollBars; virtual;
procedure InternalSetRange(const AValue: Integer); virtual;
procedure ScrollHandler(var Message: TLMScroll);
procedure SetIncrement(const AValue: TScrollBarInc); virtual;
procedure SetPage(const AValue: TScrollBarInc); virtual;
procedure SetPosition(const Value: Integer);
procedure SetRange(const AValue: Integer); virtual;
procedure SetSmooth(const AValue: Boolean); virtual;
procedure SetTracking(const AValue: Boolean);
procedure SetVisible(const AValue: Boolean); virtual;
procedure UpdateScrollBar; virtual;
procedure InvalidateScrollInfo;
{$ifdef VerboseScrollingWinControl}
function DebugCondition: Boolean;
{$endif}
function GetHorzScrollBar: TControlScrollBar; virtual;
function GetVertScrollBar: TControlScrollBar; virtual;
protected
function ScrollBarShouldBeVisible: Boolean; virtual; // should the widget be made visible?
public
constructor Create(AControl: TWinControl; AKind: TScrollBarKind);
procedure Assign(Source: TPersistent); override;
function IsScrollBarVisible: Boolean; virtual; // returns current widget state
function ScrollPos: Integer; virtual;
property Kind: TScrollBarKind read FKind;
function GetOtherScrollBar: TControlScrollBar;
property Size: integer read GetSize stored False;
function ControlSize: integer; // return for vertical scrollbar the control width
function ClientSize: integer; // return for vertical scrollbar the clientwidth
function ClientSizeWithBar: integer; // return for vertical scrollbar the clientwidth with the bar, even if Visible=false
function ClientSizeWithoutBar: integer; // return for vertical scrollbar the clientwidth without the bar, even if Visible=true
published
property Increment: TScrollBarInc read GetIncrement write SetIncrement default 8;
property Page: TScrollBarInc read GetPage write SetPage default 80;
property Smooth: Boolean read GetSmooth write SetSmooth default False;
property Position: Integer read GetPosition write SetPosition default 0; // 0..Range-Page
property Range: Integer read GetRange write SetRange stored IsRangeStored default 0; // >=Page
property Tracking: Boolean read FTracking write SetTracking default False;
property Visible: Boolean read FVisible write SetVisible default True;
end;
{ TScrollingWinControl }
TScrollingWinControl = class(TCustomControl)
private
FHorzScrollBar: TControlScrollBar;
FVertScrollBar: TControlScrollBar;
FAutoScroll: Boolean;
FIsUpdating: Boolean;
procedure SetHorzScrollBar(Value: TControlScrollBar);
procedure SetVertScrollBar(Value: TControlScrollBar);
protected
class procedure WSRegisterClass; override;
procedure AlignControls(AControl: TControl; var ARect: TRect); override;
function AutoScrollEnabled: Boolean; virtual;
procedure CalculateAutoRanges; virtual;
procedure CreateWnd; override;
function GetClientScrollOffset: TPoint; override;
function GetLogicalClientRect: TRect; override;// logical size of client area
procedure DoOnResize; override;
procedure GetPreferredSizeClientFrame(out aWidth, aHeight: integer); override;
procedure WMSize(var Message: TLMSize); message LM_Size;
procedure WMHScroll(var Message : TLMHScroll); message LM_HScroll;
procedure WMVScroll(var Message : TLMVScroll); message LM_VScroll;
procedure ComputeScrollbars; virtual;
procedure SetAutoScroll(Value: Boolean); virtual;
procedure Loaded; override;
procedure Resizing(State: TWindowState); virtual;
property AutoScroll: Boolean read FAutoScroll write SetAutoScroll default False;// auto show/hide scrollbars
procedure SetAutoSize(Value: Boolean); override;
public
constructor Create(TheOwner : TComponent); override;
destructor Destroy; override;
function ScreenToClient(const APoint: TPoint): TPoint; override;
function ClientToScreen(const APoint: TPoint): TPoint; override;
procedure UpdateScrollbars;
class function GetControlClassDefaultSize: TSize; override;
procedure ScrollBy(DeltaX, DeltaY: Integer); override;
procedure ScrollInView(AControl: TControl);
published
property HorzScrollBar: TControlScrollBar read FHorzScrollBar write SetHorzScrollBar;
property VertScrollBar: TControlScrollBar read FVertScrollBar write SetVertScrollBar;
end;
{ TScrollBox }
TScrollBox = class(TScrollingWinControl)
protected
class procedure WSRegisterClass; override;
public
constructor Create(AOwner: TComponent); override;
published
property Align;
property Anchors;
property AutoSize;
property AutoScroll default True;
property BorderSpacing;
property BiDiMode;
property BorderStyle default bsSingle;
property ChildSizing;
property ClientHeight;
property ClientWidth;
property Constraints;
property DockSite;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property Color nodefault;
property Font;
property ParentBackground default False;
property ParentBiDiMode;
property ParentColor;
property ParentFont;
property ParentShowHint;
property PopupMenu;
property ShowHint;
property TabOrder;
property TabStop;
property Visible;
//property OnCanResize;
property OnClick;
property OnConstrainedResize;
property OnDblClick;
property OnDockDrop;
property OnDockOver;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnGetSiteInfo;
property OnMouseDown;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseMove;
property OnMouseUp;
property OnMouseWheel;
property OnMouseWheelDown;
property OnMouseWheelUp;
property OnMouseWheelHorz;
property OnMouseWheelLeft;
property OnMouseWheelRight;
property OnResize;
property OnStartDock;
property OnStartDrag;
property OnUnDock;
property OnPaint;
end;
TCustomDesignControl = class(TScrollingWinControl)
private
FScaled: Boolean;
FDesignTimePPI: Integer;
FPixelsPerInch: Integer;
procedure SetDesignTimePPI(const ADesignTimePPI: Integer);
protected
procedure SetScaled(const AScaled: Boolean); virtual;
procedure DoAutoAdjustLayout(const AMode: TLayoutAdjustmentPolicy;
const AXProportion, AYProportion: Double); override;
procedure Loaded; override;
public
constructor Create(TheOwner: TComponent); override;
procedure AutoAdjustLayout(AMode: TLayoutAdjustmentPolicy; const AFromPPI,
AToPPI, AOldFormWidth, ANewFormWidth: Integer); override;
public
property DesignTimePPI: Integer read FDesignTimePPI write SetDesignTimePPI default 96;
property PixelsPerInch: Integer read FPixelsPerInch write FPixelsPerInch stored False;
property Scaled: Boolean read FScaled write SetScaled default True;
end;
{ TCustomFrame }
TCustomFrame = class(TCustomDesignControl)
private
procedure AddActionList(ActionList: TCustomActionList);
procedure RemoveActionList(ActionList: TCustomActionList);
procedure ReadDesignLeft(Reader: TReader);
procedure ReadDesignTop(Reader: TReader);
procedure WriteDesignLeft(Writer: TWriter);
procedure WriteDesignTop(Writer: TWriter);
protected
class procedure WSRegisterClass; override;
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
procedure SetParent(AParent: TWinControl); override;
procedure DefineProperties(Filer: TFiler); override;
procedure CalculatePreferredSize(var PreferredWidth,
PreferredHeight: integer; WithThemeSpace: Boolean); override;
public
constructor Create(AOwner: TComponent); override;
procedure GetChildren(Proc: TGetChildProc; Root: TComponent); override;
class function GetControlClassDefaultSize: TSize; override;
end;
TCustomFrameClass = class of TCustomFrame;
{ TFrame }
TFrame = class(TCustomFrame)
private
FLCLVersion: string;
function LCLVersionIsStored: boolean;
public
constructor Create(TheOwner: TComponent); override;
published
property Align;
property Anchors;
property AutoScroll;
property AutoSize;
property BiDiMode;
property BorderSpacing;
property ChildSizing;
property ClientHeight;
property ClientWidth;
property Color nodefault;
property Constraints;
property DesignTimePPI;
property DockSite;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property Font;
property LCLVersion: string read FLCLVersion write FLCLVersion stored LCLVersionIsStored;
property OnClick;
property OnConstrainedResize;
property OnContextPopup;
property OnDblClick;
property OnDockDrop;
property OnDockOver;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnGetSiteInfo;
property OnMouseDown;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseMove;
property OnMouseUp;
property OnMouseWheel;
property OnMouseWheelDown;
property OnMouseWheelUp;
property OnMouseWheelHorz;
property OnMouseWheelLeft;
property OnMouseWheelRight;
property OnResize;
property OnStartDock;
property OnStartDrag;
property OnUnDock;
property ParentBiDiMode;
property ParentColor;
property ParentFont;
property ParentShowHint;
property PopupMenu;
property Scaled;
property ShowHint;
property TabOrder;
property TabStop;
property Visible;
end;
{ TCustomForm }
TBorderIcon = ( // Form title bar items
biSystemMenu, // system menu
biMinimize, // minimize button
biMaximize, // maximize button
biHelp // help button
);
TBorderIcons = set of TBorderIcon;
TDefaultMonitor = ( // monitor to place form
dmDesktop, // use full desktop
dmPrimary, // use primary monitor
dmMainForm, // use monitor of main form
dmActiveForm // use monitor of active form
);
TFormStateType = (
fsCreating, // initializing (form streaming)
fsVisible, // form should be shown
fsShowing, // form handling WM_SHOWWINDOW message
fsModal, // form is modal
fsCreatedMDIChild, // todo: not mplemented
fsBorderStyleChanged,// border style is changed before window handle creation
fsFormStyleChanged, // form style is changed before window handle creation
fsFirstShow, // form is shown for the first time
fsDisableAutoSize // disable autosize
);
TFormState = set of TFormStateType;
TModalResult = UITypes.TModalResult;
PModalResult = ^UITypes.TModalResult;
TFormHandlerType = (
fhtFirstShow,
fhtClose,
fhtCreate
);
TShowInTaskbar = (
stDefault, // use default rules for showing taskbar item
stAlways, // always show taskbar item for the form
stNever // never show taskbar item for the form
);
TPopupMode = (
pmNone, // modal: popup to active form or if not available, to main form; non-modal: no window parent
pmAuto, // modal & non-modal: popup to active form or if not available, to main form
pmExplicit // modal & non-modal: popup to PopupParent or if not available, to main form
);
TCloseEvent = procedure(Sender: TObject; var CloseAction: TCloseAction) of object;
TCloseQueryEvent = procedure(Sender : TObject; var CanClose : boolean) of object;
TDropFilesEvent = procedure (Sender: TObject; const FileNames: Array of String) of object;
THelpEvent = function(Command: Word; Data: PtrInt; var CallHelp: Boolean): Boolean of object;
TShortCutEvent = procedure (var Msg: TLMKey; var Handled: Boolean) of object;
TModalDialogFinished = procedure (Sender: TObject; AResult: Integer) of object;
TCustomForm = class(TCustomDesignControl)
private
FActive: Boolean;
FActiveControl: TWinControl;
FActiveDefaultControl: TControl;
FAllowDropFiles: Boolean;
FAlphaBlend: Boolean;
FAlphaBlendValue: Byte;
FBorderIcons: TBorderIcons;
FDefaultControl: TControl;
FCancelControl: TControl;
FDefaultMonitor: TDefaultMonitor;
FDesigner: TIDesigner;
FFormStyle: TFormStyle;
FFormUpdateCount: integer;
FFormHandlers: array[TFormHandlerType] of TMethodList;
FHelpFile: string;
FIcon: TIcon;
FOnShowModalFinished: TModalDialogFinished;
FPopupMode: TPopupMode;
FPopupParent: TCustomForm;
FSmallIconHandle: HICON;
FBigIconHandle: HICON;
FKeyPreview: Boolean;
FMenu: TMainMenu;
FModalResult: TModalResult;
FLastActiveControl: TWinControl;
FLastFocusedControl: TWinControl;
FOldBorderStyle: TFormBorderStyle;
FOnActivate: TNotifyEvent;
FOnClose: TCloseEvent;
FOnCloseQuery: TCloseQueryEvent;
FOnCreate: TNotifyEvent;
FOnDeactivate: TNotifyEvent;
FOnDestroy: TNotifyEvent;
FOnDropFiles: TDropFilesEvent;
FOnHelp: THelpEvent;
FOnHide: TNotifyEvent;
FOnShortcut: TShortCutEvent;
FOnShow: TNotifyEvent;
FOnWindowStateChange: TNotifyEvent;
FPosition: TPosition;
FRestoredLeft: integer;
FRestoredTop: integer;
FRestoredWidth: integer;
FRestoredHeight: integer;
FShowInTaskbar: TShowInTaskbar;
FWindowState: TWindowState;
function GetClientHandle: HWND;
function GetEffectiveShowInTaskBar: TShowInTaskBar;
function GetMonitor: TMonitor;
function IsAutoScrollStored: Boolean;
function IsForm: Boolean;
function IsIconStored: Boolean;
procedure CloseModal;
procedure FreeIconHandles;
procedure IconChanged(Sender: TObject);
procedure Moved(Data: PtrInt);
procedure SetActive(AValue: Boolean);
procedure SetActiveControl(AWinControl: TWinControl);
procedure SetActiveDefaultControl(AControl: TControl);
procedure SetAllowDropFiles(const AValue: Boolean);
procedure SetAlphaBlend(const AValue: Boolean);
procedure SetAlphaBlendValue(const AValue: Byte);
procedure SetBorderIcons(NewIcons: TBorderIcons);
procedure SetFormBorderStyle(NewStyle: TFormBorderStyle);
procedure SetCancelControl(NewControl: TControl);
procedure SetDefaultControl(NewControl: TControl);
procedure SetFormStyle(Value : TFormStyle);
procedure SetIcon(AValue: TIcon);
procedure SetMenu(Value: TMainMenu);
procedure SetModalResult(Value: TModalResult);
procedure SetPopupMode(const AValue: TPopupMode);
procedure SetPopupParent(const AValue: TCustomForm);
procedure SetPosition(Value: TPosition);
procedure SetShowInTaskbar(Value: TShowInTaskbar);
procedure SetLastFocusedControl(AControl: TWinControl);
procedure SetWindowFocus;
procedure SetWindowState(Value : TWindowState);
procedure AddHandler(HandlerType: TFormHandlerType;
const Handler: TMethod; AsFirst: Boolean = false);
procedure RemoveHandler(HandlerType: TFormHandlerType;
const Handler: TMethod);
function FindDefaultForActiveControl: TWinControl;
procedure UpdateMenu;
procedure UpdateShowInTaskBar;
protected
procedure WMActivate(var Message : TLMActivate); message LM_ACTIVATE;
procedure WMCloseQuery(var message: TLMessage); message LM_CLOSEQUERY;
procedure WMHelp(var Message: TLMHelp); message LM_HELP;
procedure WMMove(var Message: TLMMove); message LM_MOVE;
procedure WMShowWindow(var message: TLMShowWindow); message LM_SHOWWINDOW;
procedure WMSize(var message: TLMSize); message LM_Size;
procedure WMWindowPosChanged(var Message: TLMWindowPosChanged); message LM_WINDOWPOSCHANGED;
procedure CMBiDiModeChanged(var Message: TLMessage); message CM_BIDIMODECHANGED;
procedure CMParentBiDiModeChanged(var Message: TLMessage); message CM_PARENTBIDIMODECHANGED;
procedure CMAppShowBtnGlyphChanged(var Message: TLMessage); message CM_APPSHOWBTNGLYPHCHANGED;
procedure CMAppShowMenuGlyphChanged(var Message: TLMessage); message CM_APPSHOWMENUGLYPHCHANGED;
procedure CMIconChanged(var Message: TLMessage); message CM_ICONCHANGED;
procedure CMRelease(var Message: TLMessage); message CM_RELEASE;
procedure CMActivate(var Message: TLMessage); message CM_ACTIVATE;
procedure CMDeactivate(var Message: TLMessage); message CM_DEACTIVATE;
procedure CMShowingChanged(var Message: TLMessage); message CM_SHOWINGCHANGED;
procedure WMDPIChanged(var Msg: TLMessage); message LM_DPICHANGED;
protected
FActionLists: TList; // keep this TList for Delphi compatibility
FFormBorderStyle: TFormBorderStyle;
FFormState: TFormState;
class procedure WSRegisterClass; override;
procedure DoShowWindow; virtual;
procedure Activate; virtual;
procedure ActiveChanged; virtual;
procedure AdjustClientRect(var Rect: TRect); override;
procedure BeginFormUpdate;
function ColorIsStored: boolean; override;
procedure CreateParams(var Params: TCreateParams); override;
procedure CreateWnd; override;
procedure Deactivate; virtual;
procedure DoClose(var CloseAction: TCloseAction); virtual;
procedure DoCreate; virtual;
procedure DoDestroy; virtual;
procedure DoHide; virtual;
procedure DoShow; virtual;
procedure EndFormUpdate;
function HandleCreateException: Boolean; virtual;
function HandleDestroyException: Boolean; virtual;
function HandleShowHideException: Boolean; virtual;
procedure InitializeWnd; override;
procedure Loaded; override;
procedure ChildHandlesCreated; override;
procedure Notification(AComponent: TComponent; Operation : TOperation);override;
procedure PaintWindow(dc : Hdc); override;
procedure RequestAlign; override;
procedure Resizing(State: TWindowState); override;
procedure CalculatePreferredSize(var PreferredWidth,
PreferredHeight: integer; WithThemeSpace: Boolean); override;
procedure SetZOrder(Topmost: Boolean); override;
procedure SetParent(NewParent: TWinControl); override;
procedure MoveToDefaultPosition; virtual;
procedure UpdateShowing; override;
procedure SetVisible(Value: boolean); override;
procedure AllAutoSized; override;
procedure DoFirstShow; virtual;
procedure UpdateWindowState;
procedure VisibleChanging; override;
procedure VisibleChanged; override;
procedure WndProc(var TheMessage : TLMessage); override;
function VisibleIsStored: boolean;
procedure DoSendBoundsToInterface; override;
procedure DoAutoSize; override;
procedure SetAutoSize(Value: Boolean); override;
procedure SetAutoScroll(Value: Boolean); override;
procedure SetScaled(const AScaled: Boolean); override;
procedure DoAddActionList(List: TCustomActionList);
procedure DoRemoveActionList(List: TCustomActionList);
procedure ProcessResource;virtual;
protected
// drag and dock
procedure BeginAutoDrag; override;
procedure DoDock(NewDockSite: TWinControl; var ARect: TRect); override;
function GetFloating: Boolean; override;
function GetDefaultDockCaption: String; override;
protected
// actions
procedure CMActionExecute(var Message: TLMessage); message CM_ACTIONEXECUTE;
procedure CMActionUpdate(var Message: TLMessage); message CM_ACTIONUPDATE;
function DoExecuteAction(ExeAction: TBasicAction): boolean;
function DoUpdateAction(TheAction: TBasicAction): boolean;
procedure UpdateActions; virtual;
protected
{MDI implementation}
{returns handle of MDIForm client handle (container for mdi children this
is not Handle of form itself !)}
property ClientHandle: HWND read GetClientHandle;
public
constructor Create(AOwner: TComponent); override;
constructor CreateNew(AOwner: TComponent; Num: Integer = 0); virtual;
destructor Destroy; override;
procedure AfterConstruction; override;
procedure BeforeDestruction; override;
class function GetControlClassDefaultSize: TSize; override;
function BigIconHandle: HICON;
procedure Close;
function CloseQuery: boolean; virtual;
procedure DefocusControl(Control: TWinControl; Removing: Boolean);
procedure DestroyWnd; override;
procedure EnsureVisible(AMoveToTop: Boolean = True);
procedure FocusControl(WinControl: TWinControl);
function FormIsUpdating: boolean; override;
function GetFormImage: TBitmap;
function GetRolesForControl(AControl: TControl): TControlRolesForForm;
function GetRealPopupParent: TCustomForm;
procedure Hide;
procedure IntfDropFiles(const FileNames: array of String);
procedure IntfHelp(AComponent: TComponent);
function IsShortcut(var Message: TLMKey): boolean; virtual;
procedure MakeFullyVisible(AMonitor: TMonitor = nil; UseWorkarea: Boolean = False);
function AutoSizeDelayedHandle: Boolean; override;
procedure GetPreferredSize(var PreferredWidth, PreferredHeight: integer;
Raw: boolean = false;
WithThemeSpace: boolean = true); override;
procedure Release;
function CanFocus: Boolean; override;
procedure SetFocus; override;
function SetFocusedControl(Control: TWinControl): Boolean ; virtual;
procedure SetRestoredBounds(ALeft, ATop, AWidth, AHeight: integer);
procedure Show;
function ShowModal: Integer; virtual;
procedure ShowOnTop;
function SmallIconHandle: HICON;
procedure GetChildren(Proc: TGetChildProc; Root: TComponent); override;
function WantChildKey(Child : TControl;
var Message : TLMessage): Boolean; virtual;
// handlers
procedure RemoveAllHandlersOfObject(AnObject: TObject); override;
procedure AddHandlerFirstShow(OnFirstShowHandler: TNotifyEvent;
AsFirst: Boolean=false);
procedure RemoveHandlerFirstShow(OnFirstShowHandler: TNotifyEvent);
procedure AddHandlerClose(OnCloseHandler: TCloseEvent; AsFirst: Boolean=false);
procedure RemoveHandlerClose(OnCloseHandler: TCloseEvent);
procedure AddHandlerCreate(OnCreateHandler: TNotifyEvent; AsFirst: Boolean=false);
procedure RemoveHandlerCreate(OnCreateHandler: TNotifyEvent);
public
{MDI implementation}
function ActiveMDIChild: TCustomForm; virtual;
function GetMDIChildren(AIndex: Integer): TCustomForm; virtual;
function MDIChildCount: Integer; virtual;
public
procedure AutoScale; // set scaled to True and AutoAdjustLayout to current monitor PPI
public
// drag and dock
procedure Dock(NewDockSite: TWinControl; ARect: TRect); override;
procedure UpdateDockCaption(Exclude: TControl); override;
public
property Active: Boolean read FActive;
property ActiveControl: TWinControl read FActiveControl write SetActiveControl;
property ActiveDefaultControl: TControl read FActiveDefaultControl write SetActiveDefaultControl;
property AllowDropFiles: Boolean read FAllowDropFiles write SetAllowDropFiles default False;
property AlphaBlend: Boolean read FAlphaBlend write SetAlphaBlend;
property AlphaBlendValue: Byte read FAlphaBlendValue write SetAlphaBlendValue;
property AutoScroll stored IsAutoScrollStored;
property BorderIcons: TBorderIcons read FBorderIcons write SetBorderIcons
default [biSystemMenu, biMinimize, biMaximize];
property BorderStyle: TFormBorderStyle
read FFormBorderStyle write SetFormBorderStyle default bsSizeable;
property CancelControl: TControl read FCancelControl write SetCancelControl;
property Caption stored IsForm;
property Color default {$ifdef UseCLDefault}clDefault{$else}clBtnFace{$endif};
property DefaultControl: TControl read FDefaultControl write SetDefaultControl;
property DefaultMonitor: TDefaultMonitor read FDefaultMonitor
write FDefaultMonitor default dmActiveForm;
property Designer: TIDesigner read FDesigner write FDesigner;
property EffectiveShowInTaskBar: TShowInTaskBar read GetEffectiveShowInTaskBar;
property FormState: TFormState read FFormState;
property FormStyle: TFormStyle read FFormStyle write SetFormStyle
default fsNormal;
property HelpFile: string read FHelpFile write FHelpFile;
property Icon: TIcon read FIcon write SetIcon stored IsIconStored;
property KeyPreview: Boolean read FKeyPreview write FKeyPreview default False;
property MDIChildren[I: Integer]: TCustomForm read GetMDIChildren;
property Menu : TMainMenu read FMenu write SetMenu;
property ModalResult : TModalResult read FModalResult write SetModalResult;
property Monitor: TMonitor read GetMonitor;
property LastActiveControl: TWinControl read FLastActiveControl;
property PopupMode: TPopupMode read FPopupMode write SetPopupMode default pmNone;
property PopupParent: TCustomForm read FPopupParent write SetPopupParent;
property OnActivate: TNotifyEvent read FOnActivate write FOnActivate;
property OnClose: TCloseEvent read FOnClose write FOnClose stored IsForm;
property OnCloseQuery : TCloseQueryEvent
read FOnCloseQuery write FOnCloseQuery stored IsForm;
property OnCreate: TNotifyEvent read FOnCreate write FOnCreate;
property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate;
property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy;
property OnDropFiles: TDropFilesEvent read FOnDropFiles write FOnDropFiles;
property OnHelp: THelpEvent read FOnHelp write FOnHelp;
property OnHide: TNotifyEvent read FOnHide write FOnHide;
property OnResize stored IsForm;
property OnShortcut: TShortcutEvent read FOnShortcut write FOnShortcut;
property OnShow: TNotifyEvent read FOnShow write FOnShow;
property OnShowModalFinished: TModalDialogFinished read FOnShowModalFinished write FOnShowModalFinished;
property OnWindowStateChange: TNotifyEvent
read FOnWindowStateChange write FOnWindowStateChange;
property ParentFont default False;
property Position: TPosition read FPosition write SetPosition default poDesigned;
property RestoredLeft: integer read FRestoredLeft;
property RestoredTop: integer read FRestoredTop;
property RestoredWidth: integer read FRestoredWidth;
property RestoredHeight: integer read FRestoredHeight;
property ShowInTaskBar: TShowInTaskbar read FShowInTaskbar write SetShowInTaskBar
default stDefault;
property Visible stored VisibleIsStored default false;
property WindowState: TWindowState read FWindowState write SetWindowState
default wsNormal;
end;
TCustomFormClass = class of TCustomForm;
{ TForm }
TForm = class(TCustomForm)
private
FLCLVersion: string;
function LCLVersionIsStored: boolean;
protected
procedure CreateWnd; override;
procedure Loaded; override;
public
constructor Create(TheOwner: TComponent); override;
{ mdi related routine}
procedure Cascade;
{ mdi related routine}
procedure Next;
{ mdi related routine}
procedure Previous;
{ mdi related routine}
procedure Tile;
{ mdi related property}
property ClientHandle;
property DockManager;
published
property Action;
property ActiveControl;
property Align;
property AllowDropFiles;
property AlphaBlend default False;
property AlphaBlendValue default 255;
property Anchors;
property AutoScroll;
property AutoSize;
property BiDiMode;
property BorderIcons;
property BorderStyle;
property BorderWidth;
property Caption;
property ChildSizing;
property ClientHeight;
property ClientWidth;
property Color;
property Constraints;
property DefaultMonitor;
property DesignTimePPI;
property DockSite;
property DoubleBuffered;
property DragKind;
property DragMode;
property Enabled;
property Font;
property FormStyle;
property HelpFile;
property Icon;
property KeyPreview;
property Menu;
property OnActivate;
property OnChangeBounds;
property OnClick;
property OnClose;
property OnCloseQuery;
property OnConstrainedResize;
property OnContextPopup;
property OnCreate;
property OnDblClick;
property OnDeactivate;
property OnDestroy;
property OnDockDrop;
property OnDockOver;
property OnDragDrop;
property OnDragOver;
property OnDropFiles;
property OnEndDock;
property OnGetSiteInfo;
property OnHelp;
property OnHide;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseMove;
property OnMouseUp;
property OnMouseWheel;
property OnMouseWheelDown;
property OnMouseWheelUp;
property OnMouseWheelHorz;
property OnMouseWheelLeft;
property OnMouseWheelRight;
property OnPaint;
property OnResize;
property OnShortCut;
property OnShow;
property OnShowHint;
property OnStartDock;
property OnUnDock;
property OnUTF8KeyPress;
property OnWindowStateChange;
property ParentBiDiMode;
property ParentDoubleBuffered;
property ParentFont;
property PixelsPerInch;
property PopupMenu;
property PopupMode;
property PopupParent;
property Position;
property SessionProperties;
property ShowHint;
property ShowInTaskBar;
property UseDockManager;
property LCLVersion: string read FLCLVersion write FLCLVersion stored LCLVersionIsStored;
property Scaled;
property Visible;
property WindowState;
end;
TFormClass = class of TForm;
{ TCustomDockForm }
TCustomDockForm = class(TCustomForm)
protected
procedure DoAddDockClient(Client: TControl; const ARect: TRect); override;
procedure DoRemoveDockClient(Client: TControl); override;
procedure GetSiteInfo(Client: TControl; var InfluenceRect: TRect;
MousePos: TPoint; var CanDock: Boolean); override;
procedure Loaded; override;
public
constructor Create(TheOwner: TComponent); override;
property AutoScroll default False;
property BorderStyle default bsSizeToolWin;
property FormStyle default fsStayOnTop;
published
property PixelsPerInch;
end;
{ THintWindow }
THintWindow = class(TCustomForm)
// For simple text hint without child controls.
private
FActivating: Boolean;
FAlignment: TAlignment;
FHintRect: TRect;
FHintData: Pointer;
FAutoHide: Boolean;
FAutoHideTimer: TCustomTimer;
FHideInterval: Integer;
procedure AdjustBoundsForMonitor(KeepWidth: Boolean = True;
KeepHeight: Boolean = True);
function GetDrawTextFlags: Cardinal;
procedure SetAutoHide(Value : Boolean);
procedure AutoHideHint(Sender : TObject);
procedure SetHideInterval(Value : Integer);
procedure SetHintRectAdjust(AValue: TRect);
protected
class procedure WSRegisterClass; override;
procedure WMNCHitTest(var Message: TLMessage); message LM_NCHITTEST;
procedure ActivateSub;
procedure DoShowWindow; override;
procedure UpdateRegion;
procedure SetColor(Value: TColor); override;
function UseBGThemes: Boolean;
function UseFGThemes: Boolean;
procedure Paint; override;
private class var
FSysHintFont: TFont;
protected
class function SysHintFont: TFont;
public
class destructor Destroy;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure ActivateHint(const AHint: String);
procedure ActivateHint(ARect: TRect; const AHint: String); virtual;
procedure ActivateWithBounds(ARect: TRect; const AHint: String);
procedure ActivateHintData(ARect: TRect; const AHint: String;
AData: pointer); virtual;
function CalcHintRect(MaxWidth: Integer; const AHint: String;
AData: pointer): TRect; virtual;
function OffsetHintRect(AOffset: TPoint; dy: Integer = 15;
KeepWidth: Boolean = True; KeepHeight: Boolean = True): Boolean;
procedure InitializeWnd; override;
function IsHintMsg(Msg: TMsg): Boolean; virtual;
procedure ReleaseHandle;
procedure SetBounds(ALeft, ATop, AWidth, AHeight: integer); override;
class function GetControlClassDefaultSize: TSize; override;
public
property OnMouseDown; // Public access may be needed.
property OnMouseUp;
property OnMouseMove;
property OnMouseLeave;
property Alignment: TAlignment read FAlignment write FAlignment;
property HintRect: TRect read FHintRect write FHintRect;
property HintRectAdjust: TRect read FHintRect write SetHintRectAdjust;
property HintData: Pointer read FHintData write FHintData;
property AutoHide: Boolean read FAutoHide write SetAutoHide;
property BiDiMode;
property HideInterval: Integer read FHideInterval write SetHideInterval;
end;
THintWindowClass = class of THintWindow;
{ THintWindowRendered }
THintWindowRendered = class(THintWindow)
// For rendered hint with a child control added by an external provider.
private
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure ActivateRendered;
end;
{ TMonitor }
TMonitor = class(TObject)
private
FHandle: HMONITOR;
FMonitorNum: Integer;
function GetInfo(out Info: TMonitorInfo): Boolean; {inline; fpc bug - compilation error with inline}
function GetLeft: Integer;
function GetHeight: Integer;
function GetPixelsPerInch: Integer;
function GetTop: Integer;
function GetWidth: Integer;
function GetBoundsRect: TRect;
function GetWorkareaRect: TRect;
function GetPrimary: Boolean;
public
property Handle: HMONITOR read FHandle;
property MonitorNum: Integer read FMonitorNum;
property Left: Integer read GetLeft;
property Height: Integer read GetHeight;
property Top: Integer read GetTop;
property Width: Integer read GetWidth;
property BoundsRect: TRect read GetBoundsRect;
property WorkareaRect: TRect read GetWorkareaRect;
property Primary: Boolean read GetPrimary;
property PixelsPerInch: Integer read GetPixelsPerInch;
end;
{ TMonitorList }
TMonitorList = class(TList)
private
function GetItem(AIndex: Integer): TMonitor;
procedure SetItem(AIndex: Integer; const AValue: TMonitor);
protected
procedure Notify(Ptr: Pointer; Action: TListNotification); override;
public
property Items[AIndex: Integer]: TMonitor read GetItem write SetItem; default;
end;
{ TScreen }
PCursorRec = ^TCursorRec;
TCursorRec = record
Next: PCursorRec;
Index: Integer;
Handle: HCURSOR;
end;
TScreenFormEvent = procedure(Sender: TObject; Form: TCustomForm) of object;
TScreenControlEvent = procedure(Sender: TObject;
LastControl: TControl) of object;
TScreenNotification = (
snFormAdded,
snRemoveForm,
snActiveControlChanged,
snActiveFormChanged,
snFormVisibleChanged
);
TMonitorDefaultTo = (mdNearest, mdNull, mdPrimary);
{ TScreen }
TScreen = class(TLCLComponent)
private
FActiveControl: TWinControl;
FActiveCustomForm: TCustomForm;
FActiveForm: TForm;
FCursor: TCursor;
FCursorMap: TMap;
FCustomForms: TFPList;
FCustomFormsZOrdered: TFPList;
FDefaultCursor: HCURSOR;
FHintFont: TFont;
FFocusedForm: TCustomForm;
FFonts : TStrings;
FFormList: TFPList;
FDataModuleList: TFPList;
FIconFont: TFont;
FMenuFont: TFont;
FScreenHandlers: array[TScreenNotification] of TMethodList;
FLastActiveControl: TWinControl;
FLastActiveCustomForm: TCustomForm;
FMonitors: TMonitorList;
FOnActiveControlChange: TNotifyEvent;
FOnActiveFormChange: TNotifyEvent;
FPixelsPerInch : integer;
FSaveFocusedList: TFPList;
FSystemFont: TFont;
procedure DeleteCursor(AIndex: Integer);
procedure DestroyCursors;
procedure DestroyMonitors;
function GetCursors(AIndex: Integer): HCURSOR;
function GetCustomFormCount: Integer;
function GetCustomFormZOrderCount: Integer;
function GetCustomForms(Index: Integer): TCustomForm;
function GetCustomFormsZOrdered(Index: Integer): TCustomForm;
function GetDataModuleCount: Integer;
function GetDataModules(AIndex: Integer): TDataModule;
function GetDesktopLeft: Integer;
function GetDesktopTop: Integer;
function GetDesktopHeight: Integer;
function GetDesktopWidth: Integer;
function GetDesktopRect: TRect;
function GetFonts : TStrings;
function GetFormCount: Integer;
function GetForms(IIndex: Integer): TForm;
function GetHeight : Integer;
function GetMonitor(Index: Integer): TMonitor;
function GetMonitorCount: Integer;
function GetPrimaryMonitor: TMonitor;
function GetWidth : Integer;
procedure AddForm(AForm: TCustomForm);
procedure RemoveForm(AForm: TCustomForm);
function SetFocusedForm(AForm: TCustomForm): Boolean;
procedure SetCursor(const AValue: TCursor);
procedure SetCursors(AIndex: Integer; const AValue: HCURSOR);
procedure SetHintFont(const AValue: TFont);
procedure SetIconFont(const AValue: TFont);
procedure SetMenuFont(const AValue: TFont);
procedure SetSystemFont(const AValue: TFont);
function UpdatedMonitor(AHandle: HMONITOR; ADefault: TMonitorDefaultTo;
AErrorMsg: string): TMonitor;
procedure UpdateLastActive;
procedure RestoreLastActive;
procedure AddHandler(HandlerType: TScreenNotification;
const Handler: TMethod; AsFirst: Boolean);
procedure RemoveHandler(HandlerType: TScreenNotification;
const Handler: TMethod);
procedure DoAddDataModule(DataModule: TDataModule);
procedure DoRemoveDataModule(DataModule: TDataModule);
procedure NotifyScreenFormHandler(HandlerType: TScreenNotification;
Form: TCustomForm);
function GetWorkAreaHeight: Integer;
function GetWorkAreaLeft: Integer;
function GetWorkAreaRect: TRect;
function GetWorkAreaTop: Integer;
function GetWorkAreaWidth: Integer;
protected
function GetHintFont: TFont; virtual;
function GetIconFont: TFont; virtual;
function GetMenuFont: TFont; virtual;
function GetSystemFont: TFont; virtual;
public
constructor Create(AOwner : TComponent); override;
destructor Destroy; override;
function CustomFormIndex(AForm: TCustomForm): integer;
function FormIndex(AForm: TForm): integer;
function CustomFormZIndex(AForm: TCustomForm): integer;
procedure MoveFormToFocusFront(ACustomForm: TCustomForm);
procedure MoveFormToZFront(ACustomForm: TCustomForm);
function GetCurrentModalForm: TCustomForm;
function GetCurrentModalFormZIndex: Integer;
function CustomFormBelongsToActiveGroup(AForm: TCustomForm): Boolean;
function FindNonDesignerForm(const FormName: string): TCustomForm;
function FindForm(const FormName: string): TCustomForm;
function FindNonDesignerDataModule(const DataModuleName: string): TDataModule;
function FindDataModule(const DataModuleName: string): TDataModule;
procedure UpdateMonitors;
procedure UpdateScreen;
// handler
procedure RemoveAllHandlersOfObject(AnObject: TObject); override;
procedure AddHandlerFormAdded(OnFormAdded: TScreenFormEvent;
AsFirst: Boolean=false);
procedure RemoveHandlerFormAdded(OnFormAdded: TScreenFormEvent);
procedure AddHandlerRemoveForm(OnRemoveForm: TScreenFormEvent;
AsFirst: Boolean=false);
procedure RemoveHandlerRemoveForm(OnRemoveForm: TScreenFormEvent);
procedure AddHandlerActiveControlChanged(
OnActiveControlChanged: TScreenControlEvent;
AsFirst: Boolean=false);
procedure RemoveHandlerActiveControlChanged(
OnActiveControlChanged: TScreenControlEvent);
procedure AddHandlerActiveFormChanged(OnActiveFormChanged: TScreenFormEvent;
AsFirst: Boolean=false);
procedure RemoveHandlerActiveFormChanged(OnActiveFormChanged: TScreenFormEvent);
procedure AddHandlerFormVisibleChanged(OnFormVisibleChanged: TScreenFormEvent;
AsFirst: Boolean=false);
procedure RemoveHandlerFormVisibleChanged(OnFormVisibleChanged: TScreenFormEvent);
function DisableForms(SkipForm: TCustomForm; DisabledList: TList = nil): TList;
procedure EnableForms(var AFormList: TList);
function MonitorFromPoint(const Point: TPoint;
MonitorDefault: TMonitorDefaultTo = mdNearest): TMonitor;
function MonitorFromRect(const Rect: TRect;
MonitorDefault: TMonitorDefaultTo = mdNearest): TMonitor;
function MonitorFromWindow(const Handle: THandle;
MonitorDefault: TMonitorDefaultTo = mdNearest): TMonitor;
public
property ActiveControl: TWinControl read FActiveControl;
property ActiveCustomForm: TCustomForm read FActiveCustomForm;
property ActiveForm: TForm read FActiveForm;
property Cursor: TCursor read FCursor write SetCursor;
property Cursors[Index: Integer]: HCURSOR read GetCursors write SetCursors;
property CustomFormCount: Integer read GetCustomFormCount;
property CustomForms[Index: Integer]: TCustomForm read GetCustomForms;
property CustomFormZOrderCount: Integer read GetCustomFormZOrderCount;
property CustomFormsZOrdered[Index: Integer]: TCustomForm
read GetCustomFormsZOrdered; // lower index means on top
property DesktopLeft: Integer read GetDesktopLeft;
property DesktopTop: Integer read GetDesktopTop;
property DesktopHeight: Integer read GetDesktopHeight;
property DesktopWidth: Integer read GetDesktopWidth;
property DesktopRect: TRect read GetDesktopRect;
property FocusedForm: TCustomForm read FFocusedForm;
property FormCount: Integer read GetFormCount;
property Forms[Index: Integer]: TForm read GetForms;
property DataModuleCount: Integer read GetDataModuleCount;
property DataModules[Index: Integer]: TDataModule read GetDataModules;
property HintFont: TFont read GetHintFont write SetHintFont;
property IconFont: TFont read GetIconFont write SetIconFont;
property MenuFont: TFont read GetMenuFont write SetMenuFont;
property SystemFont: TFont read GetSystemFont write SetSystemFont;
property Fonts: TStrings read GetFonts;
property Height: Integer read Getheight;
property MonitorCount: Integer read GetMonitorCount;
property Monitors[Index: Integer]: TMonitor read GetMonitor;
property PixelsPerInch: integer read FPixelsPerInch;
property PrimaryMonitor: TMonitor read GetPrimaryMonitor;
property Width: Integer read GetWidth;
property WorkAreaRect: TRect read GetWorkAreaRect;
property WorkAreaHeight: Integer read GetWorkAreaHeight;
property WorkAreaLeft: Integer read GetWorkAreaLeft;
property WorkAreaTop: Integer read GetWorkAreaTop;
property WorkAreaWidth: Integer read GetWorkAreaWidth;
property OnActiveControlChange: TNotifyEvent read FOnActiveControlChange
write FOnActiveControlChange;
property OnActiveFormChange: TNotifyEvent read FOnActiveFormChange
write FOnActiveFormChange;
end;
{ TApplication }
TQueryEndSessionEvent = procedure (var Cancel: Boolean) of object;
TExceptionEvent = procedure (Sender: TObject; E: Exception) of object;
TGetHandleEvent = procedure(var Handle: HWND) of object;
TIdleEvent = procedure (Sender: TObject; var Done: Boolean) of object;
TOnUserInputEvent = procedure(Sender: TObject; Msg: Cardinal) of object;
TDataEvent = procedure (Data: PtrInt) of object;
// application hint stuff
TCMHintShow = record
Msg: Cardinal;
Reserved: WPARAM;
HintInfo: PHintInfo;
Result: LRESULT;
end;
TCMHintShowPause = record
Msg: Cardinal;
WasActive: Integer;
Pause: PInteger;
Result: LRESULT;
end;
TAppHintTimerType = (ahttNone, ahttShowHint, ahttHideHint, ahttReshowHint);
TShowHintEvent = procedure (var HintStr: string; var CanShow: Boolean;
var HintInfo: THintInfo) of object;
THintInfoAtMouse = record
MousePos: TPoint;
Control: TControl;
ControlHasHint: boolean;
end;
TApplicationFlag = (
AppWaiting,
AppIdleEndSent,
AppNoExceptionMessages,
AppActive, // application has focus
AppDestroying,
AppDoNotCallAsyncQueue,
AppInitialized // initialization of application was done
);
TApplicationFlags = set of TApplicationFlag;
TApplicationNavigationOption = (
anoTabToSelectNext,
anoReturnForDefaultControl,
anoEscapeForCancelControl,
anoF1ForHelp,
anoArrowToSelectNextInParent
);
TApplicationNavigationOptions = set of TApplicationNavigationOption;
TApplicationHandlerType = (
ahtIdle,
ahtIdleEnd,
ahtKeyDownBefore, // before interface and LCL
ahtKeyDownAfter, // after interface and LCL
ahtActivate,
ahtDeactivate,
ahtUserInput,
ahtException,
ahtEndSession,
ahtQueryEndSession,
ahtMinimize,
ahtModalBegin,
ahtModalEnd,
ahtRestore,
ahtDropFiles,
ahtHelp,
ahtHint,
ahtShowHint,
ahtGetMainFormHandle
);
PAsyncCallQueueItem = ^TAsyncCallQueueItem;
TAsyncCallQueueItem = record
Method: TDataEvent;
Data: PtrInt;
NextItem, PrevItem: PAsyncCallQueueItem;
end;
TAsyncCallQueue = record
Top, Last: PAsyncCallQueueItem;
end;
TAsyncCallQueues = record
CritSec: TRTLCriticalSection;
Cur: TAsyncCallQueue; // currently processing
Next: TAsyncCallQueue; // new calls added to this queue
end;
// This identifies the kind of device where the application currently runs on
// Note that the same application can run in all kinds of devices if it has a
// user interface flexible enough
TApplicationType = (
atDefault, // The widgetset will attempt to auto-detect the device type
atDesktop, // For common desktops and notebooks
atPDA, // For smartphones and other devices with touch screen and a small screen
atKeyPadDevice,// Devices without any pointing device, such as keypad feature phones or kiosk machines
atTablet, // Similar to a PDA/Smartphone, but with a large screen
atTV, // The device is a television
atMobileEmulator// For desktop platforms. It will create a main windows of 240x320
// and place all forms there to immitate a mobile platform
);
TApplicationExceptionDlg = (
aedOkCancelDialog, // Exception handler window will be a dialog with Ok/Cancel buttons
aedOkMessageBox // Exception handler window will be a simple message box
);
TApplicationShowGlyphs = (
sbgAlways, // show them always (default)
sbgNever, // show them never
sbgSystem // show them depending on OS
);
TTaskBarBehavior = (
tbDefault, // widgetset dependent
tbMultiButton, // show buttons for Forms with ShowTaskBar = stDefault
tbSingleButton // hide buttons for Forms with ShowTaskBar = stDefault.
// Some Linux window managers do not support it. For example Cinnamon.
);
TApplicationDoubleBuffered = ( // what Forms.DoubleBuffered with ParentDoubleBuffered=True will gain when created
adbDefault, // widgetset dependent (LCLWin32: True unless in remote desktop connection; other WSs: False)
adbFalse, // False
adbTrue); // True
{ TApplication }
TApplication = class(TCustomApplication)
private
FApplicationHandlers: array[TApplicationHandlerType] of TMethodList;
FApplicationType: TApplicationType;
FCaptureExceptions: boolean;
FComponentsToRelease: TFPList;
FComponentsReleasing: TFPList;
FCreatingForm: TForm;// currently created form (CreateForm), candidate for MainForm
FDoubleBuffered: TApplicationDoubleBuffered;
FExceptionDialog: TApplicationExceptionDlg;
FExtendedKeysSupport: Boolean;
FFindGlobalComponentEnabled: boolean;
FFlags: TApplicationFlags;
FHint: string;
FHintColor: TColor;
FHintControl: TControl;
FHintHidePause: Integer;
FHintHidePausePerChar: Integer;
FHintPause: Integer;
FHintRect: TRect;
FHintShortCuts: Boolean;
FHintShortPause: Integer;
FHintTimer: TCustomTimer;
FHintTimerType: TAppHintTimerType;
FHintWindow: THintWindow;
FIcon: TIcon;
FBigIconHandle: HICON;
FLayoutAdjustmentPolicy: TLayoutAdjustmentPolicy;
FMainFormOnTaskBar: Boolean;
FModalLevel: Integer;
FMoveFormFocusToChildren: Boolean;
FOnCircularException: TExceptionEvent;
FOnGetMainFormHandle: TGetHandleEvent;
FOnMessageDialogFinished: TModalDialogFinished;
FOnModalBegin: TNotifyEvent;
FOnModalEnd: TNotifyEvent;
FScaled: Boolean;
FShowButtonGlyphs: TApplicationShowGlyphs;
FShowMenuGlyphs: TApplicationShowGlyphs;
FSmallIconHandle: HICON;
FIdleLockCount: Integer;
FLastKeyDownSender: TWinControl;
FLastKeyDownKeys: TWordList;
FLastKeyDownShift: TShiftState;
FMainForm : TForm;
FMouseControl: TControl;
FNavigation: TApplicationNavigationOptions;
FOldExceptProc: TExceptProc;
FOldExitProc: Pointer;
FOnActionExecute: TActionEvent;
FOnActionUpdate: TActionEvent;
FOnActivate: TNotifyEvent;
FOnDeactivate: TNotifyEvent;
FOnDestroy: TNotifyEvent;
FOnDropFiles: TDropFilesEvent;
FOnHelp: THelpEvent;
FOnHint: TNotifyEvent;
FOnIdle: TIdleEvent;
FOnIdleEnd: TNotifyEvent;
FOnEndSession: TNotifyEvent;
FOnQueryEndSession: TQueryEndSessionEvent;
FOnMinimize: TNotifyEvent;
FOnRestore: TNotifyEvent;
FOnShortcut: TShortcutEvent;
FOnShowHint: TShowHintEvent;
FOnUserInput: TOnUserInputEvent;
FAsyncCall: TAsyncCallQueues;
FShowHint: Boolean;
FShowMainForm: Boolean;
FLastMousePos: TPoint;
FLastMouseControl: TControl;
FLastMouseControlValid: Boolean;
FBidiMode: TBiDiMode;
FRestoreStayOnTop: TList;
FTaskBarBehavior: TTaskBarBehavior;
FUpdateFormatSettings: Boolean;
FRemoveStayOnTopCounter: Integer;
FExceptionCounter: Byte;
procedure DoOnIdleEnd;
function GetActive: boolean;
function GetCurrentHelpFile: string;
function GetExename: String;
function GetHandle: THandle;
function GetMainFormHandle: HWND;
function GetTitle: string;
procedure FreeIconHandles;
procedure IconChanged(Sender: TObject);
procedure SetBidiMode(const AValue: TBiDiMode);
procedure SetFlags(const AValue: TApplicationFlags);
procedure SetMainFormOnTaskBar(const AValue: Boolean);
procedure SetNavigation(const AValue: TApplicationNavigationOptions);
procedure SetShowButtonGlyphs(const AValue: TApplicationShowGlyphs);
procedure SetShowMenuGlyphs(const AValue: TApplicationShowGlyphs);
procedure SetTaskBarBehavior(const AValue: TTaskBarBehavior);
procedure UpdateMouseControl(NewMouseControl: TControl);
procedure UpdateMouseHint(CurrentControl: TControl);
procedure SetCaptureExceptions(const AValue: boolean);
procedure SetHandle(const AHandle: THandle);
procedure SetHint(const AValue: string);
procedure SetHintColor(const AValue: TColor);
procedure SetIcon(AValue: TIcon);
procedure SetShowHint(const AValue: Boolean);
procedure StopHintTimer;
function ValidateHelpSystem: Boolean;
procedure WndProc(var AMessage : TLMessage);
function DispatchAction(Msg: Longint; Action: TBasicAction): Boolean;
procedure AddHandler(HandlerType: TApplicationHandlerType;
const Handler: TMethod; AsFirst: Boolean);
procedure RemoveHandler(HandlerType: TApplicationHandlerType;
const Handler: TMethod);
procedure RunLoop;
procedure Activate(Data: PtrInt);
procedure Deactivate(Data: PtrInt);
protected
function GetConsoleApplication: boolean; override;
procedure NotifyIdleHandler(var Done: Boolean);
procedure NotifyIdleEndHandler;
procedure NotifyActivateHandler;
procedure NotifyDeactivateHandler;
procedure NotifyCustomForms(Msg: Word);
function IsHintMsg(var Msg: TMsg): Boolean;
function DoOnHelp(Command: Word; Data: PtrInt; var CallHelp: Boolean): Boolean; virtual;
procedure DoOnMouseMove; virtual;
procedure ShowHintWindow(const Info: THintInfoAtMouse);
procedure OnHintTimer(Sender: TObject);
procedure SetTitle(const AValue: String); override;
procedure StartHintTimer(Interval: integer; TimerType: TAppHintTimerType);
procedure UpdateVisible;
procedure DoIdleActions;
procedure MenuPopupHandler(Sender: TObject);
procedure ProcessAsyncCallQueue;
procedure FreeComponent(Data: PtrInt);
procedure ReleaseComponents;
procedure DoBeforeFinalization;
function GetParams(Index: Integer): string; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure ActivateHint(CursorPos: TPoint; CheckHintControlChange: Boolean = False);
function GetControlAtMouse: TControl;
procedure ControlDestroyed(AControl: TControl);
function BigIconHandle: HIcon;
function SmallIconHandle: HIcon;
procedure BringToFront;
procedure CreateForm(InstanceClass: TComponentClass; out Reference);
procedure UpdateMainForm(AForm: TForm);
procedure QueueAsyncCall(const AMethod: TDataEvent; Data: PtrInt);
procedure RemoveAsyncCalls(const AnObject: TObject);
procedure ReleaseComponent(AComponent: TComponent);
function ExecuteAction(ExeAction: TBasicAction): Boolean; override;
function UpdateAction(TheAction: TBasicAction): Boolean; override;
procedure HandleException(Sender: TObject); override;
procedure HandleMessage;
function HelpCommand(Command: Word; Data: PtrInt): Boolean;
function HelpContext(Context: THelpContext): Boolean;
function HelpKeyword(const Keyword: String): Boolean;
procedure ShowHelpForObject(Sender: TObject);
procedure RemoveStayOnTop(const ASystemTopAlso: Boolean = False);
procedure RestoreStayOnTop(const ASystemTopAlso: Boolean = False);
function IsWaiting: boolean;
procedure CancelHint;
procedure HideHint;
procedure HintMouseMessage(Control : TControl; var AMessage: TLMessage);
procedure Initialize; override;
function MessageBox(Text, Caption: PChar; Flags: Longint = MB_OK): Integer;
procedure Minimize;
procedure ModalStarted;
procedure ModalFinished;
procedure Restore;
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
procedure ProcessMessages;
procedure Idle(Wait: Boolean);
procedure Run;
procedure ShowException(E: Exception); override;
procedure Terminate; override;
procedure DisableIdleHandler;
procedure EnableIdleHandler;
procedure NotifyUserInputHandler(Sender: TObject; Msg: Cardinal);
procedure NotifyKeyDownBeforeHandler(Sender: TObject;
var Key: Word; Shift: TShiftState);
procedure NotifyKeyDownHandler(Sender: TObject;
var Key: Word; Shift: TShiftState);
procedure ControlKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
procedure ControlKeyUp(Sender: TObject; var Key: Word; Shift: TShiftState);
procedure AddOnIdleHandler(Handler: TIdleEvent; AsFirst: Boolean=true);
procedure RemoveOnIdleHandler(Handler: TIdleEvent);
procedure AddOnIdleEndHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnIdleEndHandler(Handler: TNotifyEvent);
procedure AddOnUserInputHandler(Handler: TOnUserInputEvent;
AsFirst: Boolean=true);
procedure RemoveOnUserInputHandler(Handler: TOnUserInputEvent);
procedure AddOnKeyDownBeforeHandler(Handler: TKeyEvent;
AsFirst: Boolean=true);
procedure RemoveOnKeyDownBeforeHandler(Handler: TKeyEvent);
procedure AddOnKeyDownHandler(Handler: TKeyEvent; AsFirst: Boolean=true);
procedure RemoveOnKeyDownHandler(Handler: TKeyEvent);
procedure AddOnActivateHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnActivateHandler(Handler: TNotifyEvent);
procedure AddOnDeactivateHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnDeactivateHandler(Handler: TNotifyEvent);
procedure AddOnExceptionHandler(Handler: TExceptionEvent; AsFirst: Boolean=true);
procedure RemoveOnExceptionHandler(Handler: TExceptionEvent);
procedure AddOnEndSessionHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnEndSessionHandler(Handler: TNotifyEvent);
procedure AddOnQueryEndSessionHandler(Handler: TQueryEndSessionEvent; AsFirst: Boolean=true);
procedure RemoveOnQueryEndSessionHandler(Handler: TQueryEndSessionEvent);
procedure AddOnMinimizeHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnMinimizeHandler(Handler: TNotifyEvent);
procedure AddOnModalBeginHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnModalBeginHandler(Handler: TNotifyEvent);
procedure AddOnModalEndHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnModalEndHandler(Handler: TNotifyEvent);
procedure AddOnRestoreHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnRestoreHandler(Handler: TNotifyEvent);
procedure AddOnDropFilesHandler(Handler: TDropFilesEvent; AsFirst: Boolean=true);
procedure RemoveOnDropFilesHandler(Handler: TDropFilesEvent);
procedure AddOnHelpHandler(Handler: THelpEvent; AsFirst: Boolean=true);
procedure RemoveOnHelpHandler(Handler: THelpEvent);
procedure AddOnHintHandler(Handler: TNotifyEvent; AsFirst: Boolean=true);
procedure RemoveOnHintHandler(Handler: TNotifyEvent);
procedure AddOnShowHintHandler(Handler: TShowHintEvent; AsFirst: Boolean=true);
procedure RemoveOnShowHintHandler(Handler: TShowHintEvent);
procedure AddOnGetMainFormHandleHandler(Handler: TGetHandleEvent; AsFirst: Boolean = True);
procedure RemoveOnGetMainFormHandleHandler(Handler: TGetHandleEvent);
procedure RemoveAllHandlersOfObject(AnObject: TObject); virtual;
procedure DoBeforeMouseMessage(CurMouseControl: TControl);
function IsShortcut(var Message: TLMKey): boolean;
procedure IntfQueryEndSession(var Cancel: Boolean);
procedure IntfEndSession;
procedure IntfAppActivate(const Async: Boolean = False);
procedure IntfAppDeactivate(const Async: Boolean = False);
procedure IntfAppMinimize;
procedure IntfAppRestore;
procedure IntfDropFiles(const FileNames: Array of String);
procedure IntfSettingsChange;
procedure IntfThemeOptionChange(AThemeServices: TThemeServices; AOption: TThemeOption);
function IsRightToLeft: Boolean;
function IsRTLLang(ALang: String): Boolean;
function Direction(ALang: String): TBiDiMode;
public
// on key down
procedure DoArrowKey(AControl: TWinControl; var Key: Word; Shift: TShiftState);
procedure DoTabKey(AControl: TWinControl; var Key: Word; Shift: TShiftState);
// on key up
procedure DoEscapeKey(AControl: TWinControl; var Key: Word; Shift: TShiftState);
procedure DoReturnKey(AControl: TWinControl; var Key: Word; Shift: TShiftState);
property Active: boolean read GetActive;
property ApplicationType : TApplicationType read FApplicationType write FApplicationType;
property BidiMode: TBiDiMode read FBidiMode write SetBidiMode;
property CaptureExceptions: boolean read FCaptureExceptions
write SetCaptureExceptions;
property DoubleBuffered: TApplicationDoubleBuffered read FDoubleBuffered write FDoubleBuffered default adbDefault; platform;
property ExtendedKeysSupport: Boolean read FExtendedKeysSupport write FExtendedKeysSupport; // See VK_LSHIFT in LCLType for more details
property ExceptionDialog: TApplicationExceptionDlg read FExceptionDialog write FExceptionDialog;
property FindGlobalComponentEnabled: boolean read FFindGlobalComponentEnabled
write FFindGlobalComponentEnabled;
property Flags: TApplicationFlags read FFlags write SetFlags;
//property HelpSystem : IHelpSystem read FHelpSystem;
property Handle: THandle read GetHandle write SetHandle; platform;
property Hint: string read FHint write SetHint;
property HintColor: TColor read FHintColor write SetHintColor;
property HintHidePause: Integer read FHintHidePause write FHintHidePause;
property HintHidePausePerChar: Integer read FHintHidePausePerChar write FHintHidePausePerChar;
property HintPause: Integer read FHintPause write FHintPause;
property HintShortCuts: Boolean read FHintShortCuts write FHintShortCuts;
property HintShortPause: Integer read FHintShortPause write FHintShortPause;
property Icon: TIcon read FIcon write SetIcon;
property LayoutAdjustmentPolicy: TLayoutAdjustmentPolicy read FLayoutAdjustmentPolicy write FLayoutAdjustmentPolicy;
property Navigation: TApplicationNavigationOptions read FNavigation write SetNavigation;
property MainForm: TForm read FMainForm;
property MainFormHandle: HWND read GetMainFormHandle;
property MainFormOnTaskBar: Boolean read FMainFormOnTaskBar write SetMainFormOnTaskBar; platform;
property ModalLevel: Integer read FModalLevel;
property MoveFormFocusToChildren: Boolean read FMoveFormFocusToChildren write FMoveFormFocusToChildren default True;
property MouseControl: TControl read FMouseControl;
property TaskBarBehavior: TTaskBarBehavior read FTaskBarBehavior write SetTaskBarBehavior;
property UpdateFormatSettings: Boolean read FUpdateFormatSettings write FUpdateFormatSettings; platform;
property OnActionExecute: TActionEvent read FOnActionExecute write FOnActionExecute;
property OnActionUpdate: TActionEvent read FOnActionUpdate write FOnActionUpdate;
property OnActivate: TNotifyEvent read FOnActivate write FOnActivate;
property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate;
property OnGetMainFormHandle: TGetHandleEvent read FOnGetMainFormHandle write FOnGetMainFormHandle;
property OnIdle: TIdleEvent read FOnIdle write FOnIdle;
property OnIdleEnd: TNotifyEvent read FOnIdleEnd write FOnIdleEnd;
property OnEndSession: TNotifyEvent read FOnEndSession write FOnEndSession;
property OnQueryEndSession: TQueryEndSessionEvent read FOnQueryEndSession write FOnQueryEndSession;
property OnMinimize: TNotifyEvent read FOnMinimize write FOnMinimize;
property OnMessageDialogFinished: TModalDialogFinished read FOnMessageDialogFinished write FOnMessageDialogFinished;
property OnModalBegin: TNotifyEvent read FOnModalBegin write FOnModalBegin;
property OnModalEnd: TNotifyEvent read FOnModalEnd write FOnModalEnd;
property OnRestore: TNotifyEvent read FOnRestore write FOnRestore;
property OnDropFiles: TDropFilesEvent read FOnDropFiles write FOnDropFiles;
property OnHelp: THelpEvent read FOnHelp write FOnHelp;
property OnHint: TNotifyEvent read FOnHint write FOnHint;
property OnShortcut: TShortcutEvent read FOnShortcut write FOnShortcut;
property OnShowHint: TShowHintEvent read FOnShowHint write FOnShowHint;
property OnUserInput: TOnUserInputEvent read FOnUserInput write FOnUserInput;
property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy;
property OnCircularException: TExceptionEvent read FOnCircularException write FOnCircularException;
property ShowButtonGlyphs: TApplicationShowGlyphs read FShowButtonGlyphs write SetShowButtonGlyphs default sbgAlways;
property ShowMenuGlyphs: TApplicationShowGlyphs read FShowMenuGlyphs write SetShowMenuGlyphs default sbgAlways;
property ShowHint: Boolean read FShowHint write SetShowHint;
property ShowMainForm: Boolean read FShowMainForm write FShowMainForm default True;
property Title: String read GetTitle write SetTitle;
property Scaled: Boolean read FScaled write FScaled;
end;
const
DefaultApplicationBiDiMode: TBiDiMode = bdLeftToRight;
DefHintColor = clInfoBk; // default hint window color
DefHintPause = 500; // default pause before hint window displays (ms)
DefHintShortPause = 0; // default reshow pause
DefHintHidePause = 5*DefHintPause; // default pause before hint is hidden (ms)
DefHintHidePausePerChar = 200; // added to DefHintHidePause (ms)
type
{ TApplicationProperties }
TApplicationProperties = class(TLCLComponent)
private
FCaptureExceptions: boolean;
FExceptionDialogType: TApplicationExceptionDlg;
FHelpFile: string;
FHint: string;
FHintColor: TColor;
FHintHidePause: Integer;
FHintPause: Integer;
FHintShortCuts: Boolean;
FHintShortPause: Integer;
FOnActivate: TNotifyEvent;
FOnDeactivate: TNotifyEvent;
FOnDropFiles: TDropFilesEvent;
FOnGetMainFormHandle: TGetHandleEvent;
FOnModalBegin: TNotifyEvent;
FOnModalEnd: TNotifyEvent;
FShowButtonGlyphs: TApplicationShowGlyphs;
FShowHint: Boolean;
FShowMainForm: Boolean;
FShowMenuGlyphs: TApplicationShowGlyphs;
FTitle: String;
FOnException: TExceptionEvent;
FOnIdle: TIdleEvent;
FOnIdleEnd: TNotifyEvent;
FOnHelp: THelpEvent;
FOnHint: TNotifyEvent;
FOnShowHint: TShowHintEvent;
FOnUserInput: TOnUserInputEvent;
FOnEndSession : TNotifyEvent;
FOnQueryEndSession : TQueryEndSessionEvent;
FOnMinimize : TNotifyEvent;
FOnRestore : TNotifyEvent;
procedure SetExceptionDialog(AValue: TApplicationExceptionDlg);
protected
procedure SetCaptureExceptions(const AValue : boolean);
procedure SetHelpFile(const AValue : string);
procedure SetHint(const AValue : string);
procedure SetHintColor(const AValue : TColor);
procedure SetHintHidePause(const AValue : Integer);
procedure SetHintPause(const AValue : Integer);
procedure SetHintShortCuts(const AValue : Boolean);
procedure SetHintShortPause(const AValue : Integer);
procedure SetShowButtonGlyphs(const AValue: TApplicationShowGlyphs);
procedure SetShowMenuGlyphs(const AValue: TApplicationShowGlyphs);
procedure SetShowHint(const AValue : Boolean);
procedure SetShowMainForm(const AValue: Boolean);
procedure SetTitle(const AValue : String);
procedure SetOnActivate(AValue: TNotifyEvent);
procedure SetOnDeactivate(AValue: TNotifyEvent);
procedure SetOnException(const AValue : TExceptionEvent);
procedure SetOnGetMainFormHandle(const AValue: TGetHandleEvent);
procedure SetOnIdle(const AValue : TIdleEvent);
procedure SetOnIdleEnd(const AValue : TNotifyEvent);
procedure SetOnEndSession(const AValue : TNotifyEvent);
procedure SetOnQueryEndSession(const AValue : TQueryEndSessionEvent);
procedure SetOnMinimize(const AValue : TNotifyEvent);
procedure SetOnModalBegin(const AValue: TNotifyEvent);
procedure SetOnModalEnd(const AValue: TNotifyEvent);
procedure SetOnRestore(const AValue : TNotifyEvent);
procedure SetOnDropFiles(const AValue: TDropFilesEvent);
procedure SetOnHelp(const AValue : THelpEvent);
procedure SetOnHint(const AValue : TNotifyEvent);
procedure SetOnShowHint(const AValue : TShowHintEvent);
procedure SetOnUserInput(const AValue : TOnUserInputEvent);
public
constructor Create(AOwner: TComponent); Override;
destructor Destroy; override;
published
property CaptureExceptions: boolean read FCaptureExceptions
write SetCaptureExceptions default True;
property ExceptionDialog: TApplicationExceptionDlg read FExceptionDialogType
write SetExceptionDialog default aedOkCancelDialog;
property HelpFile: string read FHelpFile write SetHelpFile;
property Hint: string read FHint write SetHint;
property HintColor: TColor read FHintColor write SetHintColor default DefHintColor;
property HintHidePause: Integer read FHintHidePause write SetHintHidePause default DefHintHidePause;
property HintPause: Integer read FHintPause write SetHintPause default DefHintPause;
property HintShortCuts: Boolean read FHintShortCuts write SetHintShortCuts default True;
property HintShortPause: Integer read FHintShortPause write SetHintShortPause default DefHintShortPause;
property ShowButtonGlyphs: TApplicationShowGlyphs read FShowButtonGlyphs write SetShowButtonGlyphs default sbgAlways;
property ShowMenuGlyphs: TApplicationShowGlyphs read FShowMenuGlyphs write SetShowMenuGlyphs default sbgAlways;
property ShowHint: Boolean read FShowHint write SetShowHint default True;
property ShowMainForm: Boolean read FShowMainForm write SetShowMainForm default True;
property Title: String read FTitle write SetTitle;
property OnActivate: TNotifyEvent read FOnActivate write SetOnActivate;
property OnDeactivate: TNotifyEvent read FOnDeactivate write SetOnDeactivate;
property OnException: TExceptionEvent read FOnException write SetOnException;
property OnGetMainFormHandle: TGetHandleEvent read FOnGetMainFormHandle write SetOnGetMainFormHandle;
property OnIdle: TIdleEvent read FOnIdle write SetOnIdle;
property OnIdleEnd: TNotifyEvent read FOnIdleEnd write SetOnIdleEnd;
property OnEndSession: TNotifyEvent read FOnEndSession write SetOnEndSession;
property OnQueryEndSession: TQueryEndSessionEvent read FOnQueryEndSession write SetOnQueryEndSession;
property OnMinimize: TNotifyEvent read FOnMinimize write SetOnMinimize;
property OnModalBegin: TNotifyEvent read FOnModalBegin write SetOnModalBegin;
property OnModalEnd: TNotifyEvent read FOnModalEnd write SetOnModalEnd;
property OnRestore: TNotifyEvent read FOnRestore write SetOnRestore;
property OnDropFiles: TDropFilesEvent read FOnDropFiles write SetOnDropFiles;
property OnHelp: THelpEvent read FOnHelp write SetOnHelp;
property OnHint: TNotifyEvent read FOnHint write SetOnHint;
property OnShowHint: TShowHintEvent read FOnShowHint write SetOnShowHint;
property OnUserInput: TOnUserInputEvent read FOnUserInput write SetOnUserInput;
end;
{ TIDesigner }
TIDesigner = class(TObject)
protected
FLookupRoot: TComponent;
FDefaultFormBoundsValid: boolean;
public
function IsDesignMsg(Sender: TControl; var Message: TLMessage): Boolean;
virtual; abstract;
procedure UTF8KeyPress(var UTF8Key: TUTF8Char); virtual; abstract;
procedure Modified; virtual; abstract;
procedure Notification(AComponent: TComponent;
Operation: TOperation); virtual; abstract;
procedure PaintGrid; virtual; abstract;
procedure ValidateRename(AComponent: TComponent;
const CurName, NewName: string); virtual; abstract;
function GetShiftState: TShiftState; virtual; abstract;
procedure SelectOnlyThisComponent(AComponent: TComponent); virtual; abstract;
function UniqueName(const BaseName: string): string; virtual; abstract;
procedure PrepareFreeDesigner(AFreeComponent: boolean); virtual; abstract;
public
property LookupRoot: TComponent read FLookupRoot;
property DefaultFormBoundsValid: boolean read FDefaultFormBoundsValid
write FDefaultFormBoundsValid;
end;
{ TFormPropertyStorage - abstract base class }
TFormPropertyStorage = class(TControlPropertyStorage)
private
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
procedure FormDestroy(Sender : TObject);
public
constructor Create(TheOwner: TComponent); override;
destructor Destroy; override;
end;
function KeysToShiftState(Keys: PtrUInt): TShiftState;
function KeyDataToShiftState(KeyData: PtrInt): TShiftState;
function KeyboardStateToShiftState: TShiftState;
function ShiftStateToKeys(ShiftState: TShiftState): PtrUInt;
function WindowStateToStr(const State: TWindowState): string;
function StrToWindowState(const Name: string): TWindowState;
function dbgs(const State: TWindowState): string; overload;
function dbgs(const Action: TCloseAction): string; overload;
function dbgs(const Kind: TScrollBarKind): string; overload;
type
TFocusState = Pointer;
function SaveFocusState: TFocusState;
procedure RestoreFocusState(FocusState: TFocusState);
type
TGetDesignerFormEvent = function(APersistent: TPersistent): TCustomForm of object;
TIsFormDesignFunction = function(AForm: TWinControl): boolean;
var
OnGetDesignerForm: TGetDesignerFormEvent = nil;
IsFormDesign: TIsFormDesignFunction = nil;
function GetParentForm(Control: TControl; TopForm: Boolean = True): TCustomForm;
function GetDesignerForm(Control: TControl): TCustomForm;
function GetFirstParentForm(Control:TControl): TCustomForm;
function GetTopFormSkipNonDocked(Control: TControl): TCustomForm;
function ValidParentForm(Control: TControl; TopForm: Boolean = True): TCustomForm;
function GetDesignerForm(APersistent: TPersistent): TCustomForm;
function FindRootDesigner(APersistent: TPersistent): TIDesigner;
function GetParentDesignControl(Control: TControl): TCustomDesignControl;
function NeedParentDesignControl(Control: TControl): TCustomDesignControl;
function IsAccel(VK: word; const Str: string): Boolean;
procedure NotifyApplicationUserInput(Target: TControl; Msg: Cardinal);
function GetShortHint(const Hint: string): string;
function GetLongHint(const Hint: string): string;
var
Application: TApplication = nil;
Screen: TScreen = nil;
ExceptionObject: TExceptObject;
HintWindowClass: THintWindowClass = THintWindow;
RequireDerivedFormResource: Boolean = False;
type
TMessageBoxFunction = function(Text, Caption : PChar; Flags : Longint) : Integer;
var
MessageBoxFunction: TMessageBoxFunction = nil;
const
DefaultBorderIcons : array[TFormBorderStyle] of TBorderIcons =
([], // bsNone
[biSystemMenu, biMinimize], // bsSingle
[biSystemMenu, biMinimize, biMaximize], // bsSizeable
[biSystemMenu], // bsDialog
[biSystemMenu, biMinimize], // bsToolWindow
[biSystemMenu, biMinimize, biMaximize]); // bsSizeToolWin
procedure CreateWidgetset(AWidgetsetClass: TWidgetsetClass);
procedure FreeWidgetSet;
procedure Register;
implementation
{$R cursors.res}
{$ifdef WinCE}
{$define extdecl := cdecl}
{$else}
{$define extdecl := stdcall}
{$endif}
uses
WSControls, WSForms; // Widgetset uses circle is allowed
var
HandlingException: Boolean = False;
HaltingProgram: Boolean = False;
LastFocusedControl: TWinControl = nil;
procedure Register;
begin
RegisterComponents('Standard',[TFrame]);
RegisterComponents('Additional',[TScrollBox, TApplicationProperties]);
end;
{------------------------------------------------------------------------------
procedure NotifyApplicationUserInput;
------------------------------------------------------------------------------}
procedure NotifyApplicationUserInput(Target: TControl; Msg: Cardinal);
begin
if Assigned(Application) then
Application.NotifyUserInputHandler(Target, Msg);
end;
//------------------------------------------------------------------------------
procedure ExceptionOccurred(Sender: TObject; Addr:Pointer; FrameCount: Longint;
Frames: PPointer);
Begin
DebugLn('[FORMS.PP] ExceptionOccurred ');
if HaltingProgram or HandlingException then Halt;
HandlingException:=true;
if Sender<>nil then
begin
DebugLn(' Sender=',Sender.ClassName);
if Sender is Exception then
begin
DebugLn(' Exception=',Exception(Sender).Message);
DumpExceptionBackTrace();
end;
end else
DebugLn(' Sender=nil');
if Application<>nil then
Application.HandleException(Sender);
HandlingException:=false;
end;
procedure BeforeFinalization;
// This is our ExitProc handler.
begin
Application.DoBeforeFinalization;
end;
function SaveFocusState: TFocusState;
begin
Result := LastFocusedControl;
end;
procedure RestoreFocusState(FocusState: TFocusState);
begin
LastFocusedControl := TWinControl(FocusState);
end;
//------------------------------------------------------------------------------
function KeysToShiftState(Keys: PtrUInt): TShiftState;
begin
Result := [];
if Keys and MK_Shift <> 0 then Include(Result, ssShift);
if Keys and MK_Control <> 0 then Include(Result, ssCtrl);
if Keys and MK_LButton <> 0 then Include(Result, ssLeft);
if Keys and MK_RButton <> 0 then Include(Result, ssRight);
if Keys and MK_MButton <> 0 then Include(Result, ssMiddle);
if Keys and MK_XBUTTON1 <> 0 then Include(Result, ssExtra1);
if Keys and MK_XBUTTON2 <> 0 then Include(Result, ssExtra2);
if Keys and MK_DOUBLECLICK <> 0 then Include(Result, ssDouble);
if Keys and MK_TRIPLECLICK <> 0 then Include(Result, ssTriple);
if Keys and MK_QUADCLICK <> 0 then Include(Result, ssQuad);
if GetKeyState(VK_MENU) < 0 then Include(Result, ssAlt);
if (GetKeyState(VK_LWIN) < 0) or (GetKeyState(VK_RWIN) < 0) then Include(Result, ssMeta);
end;
function KeyboardStateToShiftState: TShiftState;
begin
Result := [];
if GetKeyState(VK_SHIFT) < 0 then Include(Result, ssShift);
if GetKeyState(VK_CONTROL) < 0 then Include(Result, ssCtrl);
if GetKeyState(VK_MENU) < 0 then Include(Result, ssAlt);
if (GetKeyState(VK_LWIN) < 0) or
(GetKeyState(VK_RWIN) < 0) then Include(Result, ssMeta);
end;
function KeyDataToShiftState(KeyData: PtrInt): TShiftState;
begin
Result := MsgKeyDataToShiftState(KeyData);
end;
function ShiftStateToKeys(ShiftState: TShiftState): PtrUInt;
begin
Result := 0;
if ssShift in ShiftState then Result := Result or MK_SHIFT;
if ssCtrl in ShiftState then Result := Result or MK_CONTROL;
if ssLeft in ShiftState then Result := Result or MK_LBUTTON;
if ssRight in ShiftState then Result := Result or MK_RBUTTON;
if ssMiddle in ShiftState then Result := Result or MK_MBUTTON;
if ssExtra1 in ShiftState then Result := Result or MK_XBUTTON1;
if ssExtra2 in ShiftState then Result := Result or MK_XBUTTON2;
if ssDouble in ShiftState then Result := Result or MK_DOUBLECLICK;
if ssTriple in ShiftState then Result := Result or MK_TRIPLECLICK;
if ssQuad in ShiftState then Result := Result or MK_QUADCLICK;
end;
function WindowStateToStr(const State: TWindowState): string;
begin
Result:=GetEnumName(TypeInfo(TWindowState),ord(State));
end;
function StrToWindowState(const Name: string): TWindowState;
begin
Result:=TWindowState(GetEnumValueDef(TypeInfo(TWindowState),Name,
ord(wsNormal)));
end;
function dbgs(const State: TWindowState): string; overload;
begin
Result:=GetEnumName(TypeInfo(TWindowState),ord(State));
end;
function dbgs(const Action: TCloseAction): string; overload;
begin
Result:=GetEnumName(TypeInfo(TCloseAction),ord(Action));
end;
function dbgs(const Kind: TScrollBarKind): string;
begin
if Kind=sbVertical then
Result:='sbVertical'
else
Result:='sbHorizontal';
end;
//------------------------------------------------------------------------------
function GetParentForm(Control: TControl; TopForm: Boolean): TCustomForm;
begin
//For Delphi compatibility if Control is a TCustomForm with no parent, the function returns the TCustomForm itself
while (Control <> nil) and (Control.Parent <> nil) do
begin
if (not TopForm) and (Control is TCustomForm) then
Break;
Control := Control.Parent;
end;
if Control is TCustomForm then
Result := TCustomForm(Control)
else
Result := nil;
end;
//------------------------------------------------------------------------------
function GetParentDesignControl(Control: TControl): TCustomDesignControl;
begin
while (Control <> nil) and (Control.Parent <> nil) do
Control := Control.Parent;
if Control is TCustomDesignControl then
Result := TCustomDesignControl(Control)
else
Result := nil;
end;
//------------------------------------------------------------------------------
function NeedParentDesignControl(Control: TControl): TCustomDesignControl;
begin
Result := GetParentDesignControl(Control);
if Result=nil then
raise EInvalidOperation.CreateFmt(rsControlHasNoParentFormOrFrame, [Control.Name]);
end;
//------------------------------------------------------------------------------
function GetDesignerForm(Control: TControl): TCustomForm;
begin
// find the topmost parent form with designer
Result := nil;
while Control<>nil do
begin
if (Control is TCustomForm) and (TCustomForm(Control).Designer<>nil) then
Result := TCustomForm(Control);
Control := Control.Parent;
end;
end;
function GetTopFormSkipNonDocked(Control: TControl): TCustomForm;
var
aForm: TCustomForm;
begin
Result:=GetParentForm(Control, False);
if Result=nil then exit;
if Result.DockSite or Result.UseDockManager then exit;
repeat
aForm:=GetParentForm(Result.Parent,false);
if (aForm=nil) or aForm.DockSite or aForm.UseDockManager then exit;
Result:=aForm;
until false;
end;
//------------------------------------------------------------------------------
function ValidParentForm(Control: TControl; TopForm: Boolean): TCustomForm;
begin
Result := GetParentForm(Control, TopForm);
if Result = nil then
raise EInvalidOperation.CreateFmt(sParentRequired, [Control.Name]);
end;
//------------------------------------------------------------------------------
function IsAccel(VK: word; const Str: string): Boolean;
const
AmpersandChar = '&';
var
position: integer;
ACaption, FoundChar: string;
begin
ACaption := Str;
Result := false;
position := UTF8Pos(AmpersandChar, ACaption);
// if AmpersandChar is on the last position then there is nothing to underscore, ignore this character
while (position > 0) and (position < UTF8Length(ACaption)) do
begin
FoundChar := UTF8Copy(ACaption, position+1, 1);
// two AmpersandChar characters together are not valid hot key
if FoundChar <> AmpersandChar then begin
Result := UTF8UpperCase(UTF16ToUTF8(WideString(WideChar(VK)))) = UTF8UpperCase(FoundChar);
exit;
end
else begin
UTF8Delete(ACaption, 1, position+1);
position := UTF8Pos(AmpersandChar, ACaption);
end;
end;
end;
//==============================================================================
function FindRootDesigner(APersistent: TPersistent): TIDesigner;
var
Form: TCustomForm;
begin
Result:=nil;
Form:=GetDesignerForm(APersistent);
if Form<>nil then
Result:=Form.Designer;
end;
function GetFirstParentForm(Control: TControl): TCustomForm;
begin
if (Control = nil) then
Result:= nil
else
Result := GetParentForm(Control, False);
end;
function GetDesignerForm(APersistent: TPersistent): TCustomForm;
begin
if APersistent = nil then Exit(nil);
if Assigned(OnGetDesignerForm) then
Result := OnGetDesignerForm(APersistent)
else
begin
Result := nil;
repeat
if (APersistent is TComponent) then begin
if TComponent(APersistent).Owner=nil then
exit;
APersistent:=TComponent(APersistent).Owner
end else if APersistent is TCollection then begin
if TCollection(APersistent).Owner=nil then
exit;
APersistent:=TCollection(APersistent).Owner
end else if APersistent is TCollectionItem then begin
if TCollectionItem(APersistent).Collection=nil then
exit;
APersistent:=TCollectionItem(APersistent).Collection
end else if APersistent is TCustomForm then begin
Result := TCustomForm(APersistent);
exit;
end else
exit;
until false;
end;
end;
function SendApplicationMsg(Msg: Cardinal; WParam: WParam; LParam: LParam): Longint;
var
AMessage: TLMessage;
begin
if Application<>nil then begin
AMessage.Msg := Msg;
AMessage.WParam := WParam;
AMessage.LParam := LParam;
{ Can't simply use SendMessage, as the Application does not necessarily have a handle }
Application.WndProc(AMessage);
Result := AMessage.Result;
end else
Result := 0;
end;
procedure IfOwnerIsFormThenDesignerModified(AComponent: TComponent);
begin
if (AComponent<>nil) and (AComponent.Owner<>nil)
and ([csDesigning,csLoading]*AComponent.ComponentState=[csDesigning])
and (AComponent.Owner is TForm)
and (TForm(AComponent.Owner).Designer <> nil) then
TForm(AComponent.Owner).Designer.Modified;
end;
function GetShortHint(const Hint: string): string;
var
I: Integer;
begin
I := Pos('|', Hint);
if I = 0 then
Result := Hint else
Result := Copy(Hint, 1, I - 1);
end;
function GetLongHint(const Hint: string): string;
var
I: Integer;
begin
I := Pos('|', Hint);
if I = 0 then
Result := Hint else
Result := Copy(Hint, I + 1, Maxint);
end;
procedure CreateWidgetset(AWidgetsetClass: TWidgetsetClass);
begin
//debugln('CreateWidgetset');
CallInterfaceInitializationHandlers;
WidgetSet := AWidgetsetClass.Create;
end;
procedure FreeWidgetSet;
begin
//debugln('FreeWidgetSet');
if Screen <> nil then
begin
Screen.DestroyCursors;
Screen.DestroyMonitors;
end;
Application.Free;
Application:=nil;
FreeAllClipBoards;
CallInterfaceFinalizationHandlers;
WidgetSet.Free;
WidgetSet:=nil;
end;
//==============================================================================
{$I controlscrollbar.inc}
{$I scrollingwincontrol.inc}
{$I scrollbox.inc}
{$I customdesigncontrol.inc}
{$I customframe.inc}
{$I customform.inc}
{$I customdockform.inc}
{$I monitor.inc}
{$I screen.inc}
{$I application.inc}
{$I applicationproperties.inc}
{$I hintwindow.inc}
//==============================================================================
procedure ImageDrawEvent(AImageList: TPersistent; ACanvas: TPersistent;
AX, AY, AIndex: Integer; ADrawEffect: TGraphicsDrawEffect;
AImageWidth: Integer; ARefControl: TPersistent);
var
ImageList: TCustomImageList absolute AImageList;
Canvas: TCanvas absolute ACanvas;
RefControl: TControl absolute ARefControl;
begin
if (RefControl<>nil) and ImageList.Scaled then
ImageList.DrawForControl(Canvas,AX,AY,AIndex,AImageWidth,RefControl,ADrawEffect)
else
ImageList.Draw(Canvas,AX,AY,AIndex,ADrawEffect)
end;
function IsFormDesignFunction(AForm: TWinControl): boolean;
var
LForm: TCustomForm absolute AForm;
begin
if (AForm = nil) or not (AForm is TCustomForm) then
Exit(False);
Result := (csDesignInstance in LForm.ComponentState)
or ((csDesigning in LForm.ComponentState) and (LForm.Designer <> nil));
end;
initialization
RegisterPropertyToSkip(TForm, 'OldCreateOrder', 'VCL compatibility property', '');
RegisterPropertyToSkip(TForm, 'TextHeight', 'VCL compatibility property', '');
RegisterPropertyToSkip(TForm, 'Scaled', 'VCL compatibility property', '');
RegisterPropertyToSkip(TForm, 'TransparentColorValue', 'VCL compatibility property', '');
LCLProc.OwnerFormDesignerModifiedProc:=@IfOwnerIsFormThenDesignerModified;
ThemesImageDrawEvent:=@ImageDrawEvent;
IsFormDesign := @IsFormDesignFunction;
Screen:=TScreen.Create(nil);
Application:=TApplication.Create(nil);
finalization
//DebugLn('forms.pp - finalization section');
LCLProc.OwnerFormDesignerModifiedProc:=nil;
HintWindowClass:=nil;
FreeThenNil(Application);
FreeThenNil(Screen);
end.
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