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{ $Id: win32wscontrols.pp 58912 2018-09-08 20:04:47Z michl $}
{
*****************************************************************************
* Win32WSControls.pp *
* ------------------ *
* *
* *
*****************************************************************************
*****************************************************************************
This file is part of the Lazarus Component Library (LCL)
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
}
unit Win32WSControls;
{$mode objfpc}{$H+}
{$I win32defines.inc}
interface
uses
////////////////////////////////////////////////////
// I M P O R T A N T
////////////////////////////////////////////////////
// To get as little as posible circles,
// uncomment only when needed for registration
////////////////////////////////////////////////////
CommCtrl, Windows, Classes, Controls, Graphics,
////////////////////////////////////////////////////
WSControls, WSLCLClasses, SysUtils, Win32Proc, Win32Extra, WSProc,
{ LCL }
InterfaceBase, LCLType, LCLIntf, LCLProc, LazUTF8, Themes, Forms;
type
{ TWin32WSDragImageListResolution }
TWin32WSDragImageListResolution = class(TWSDragImageListResolution)
published
class function BeginDrag(const ADragImageList: TDragImageListResolution; Window: HWND;
AIndex, X, Y: Integer): Boolean; override;
class function DragMove(const ADragImageList: TDragImageListResolution; X, Y: Integer): Boolean; override;
class procedure EndDrag(const ADragImageList: TDragImageListResolution); override;
class function HideDragImage(const ADragImageList: TDragImageListResolution;
ALockedWindow: HWND; DoUnLock: Boolean): Boolean; override;
class function ShowDragImage(const ADragImageList: TDragImageListResolution;
ALockedWindow: HWND; X, Y: Integer; DoLock: Boolean): Boolean; override;
end;
{ TWin32WSControl }
TWin32WSControl = class(TWSControl)
published
end;
{ TWin32WSWinControl }
TWin32WSWinControl = class(TWSWinControl)
published
class procedure AddControl(const AControl: TControl); override;
class function GetText(const AWinControl: TWinControl; var AText: String): Boolean; override;
class procedure SetBiDiMode(const AWinControl: TWinControl; UseRightToLeftAlign, UseRightToLeftReading, UseRightToLeftScrollBar : Boolean); override;
class procedure SetBounds(const AWinControl: TWinControl; const ALeft, ATop, AWidth, AHeight: Integer); override;
class procedure SetBorderStyle(const AWinControl: TWinControl; const ABorderStyle: TBorderStyle); override;
class procedure SetChildZPosition(const AWinControl, AChild: TWinControl;
const AOldPos, ANewPos: Integer;
const AChildren: TFPList); override;
class procedure SetColor(const AWinControl: TWinControl); override;
class procedure SetFont(const AWinControl: TWinControl; const AFont: TFont); override;
class procedure SetText(const AWinControl: TWinControl; const AText: string); override;
class procedure SetCursor(const AWinControl: TWinControl; const ACursor: HCursor); override;
class procedure SetShape(const AWinControl: TWinControl; const AShape: HBITMAP); override;
class procedure ConstraintsChange(const AWinControl: TWinControl); override;
class function CreateHandle(const AWinControl: TWinControl;
const AParams: TCreateParams): HWND; override;
class procedure DestroyHandle(const AWinControl: TWinControl); override;
class procedure Invalidate(const AWinControl: TWinControl); override;
class procedure PaintTo(const AWinControl: TWinControl; ADC: HDC; X, Y: Integer); override;
class procedure ShowHide(const AWinControl: TWinControl); override;
class procedure ScrollBy(const AWinControl: TWinControl; DeltaX, DeltaY: integer); override;
end;
{ TWin32WSGraphicControl }
TWin32WSGraphicControl = class(TWSGraphicControl)
published
end;
{ TWin32WSCustomControl }
TWin32WSCustomControl = class(TWSCustomControl)
published
end;
{ TWin32WSImageList }
TWin32WSImageList = class(TWSImageList)
published
end;
type
TCreateWindowExParams = record
Buddy, Parent, Window: HWND;
Left, Top, Height, Width: integer;
WindowInfo, BuddyWindowInfo: PWin32WindowInfo;
Flags, FlagsEx: dword;
SubClassWndProc: pointer;
StrCaption, WindowTitle: String;
pClassName: PChar;
pSubClassName: PChar;
end;
TNCCreateParams = record
WinControl: TWinControl;
DefWndProc: WNDPROC;
Handled: Boolean;
end;
PNCCreateParams = ^TNCCreateParams;
// TODO: better names?
procedure PrepareCreateWindow(const AWinControl: TWinControl;
const CreateParams: TCreateParams; out Params: TCreateWindowExParams);
procedure FinishCreateWindow(const AWinControl: TWinControl; var Params: TCreateWindowExParams;
const AlternateCreateWindow: boolean; SubClass: Boolean = False);
procedure WindowCreateInitBuddy(const AWinControl: TWinControl;
var Params: TCreateWindowExParams);
// Must be in win32proc but TCreateWindowExParams declared here
procedure SetStdBiDiModeParams(const AWinControl: TWinControl; var Params:TCreateWindowExParams);
implementation
uses
Win32Int;
{ Global helper routines }
procedure PrepareCreateWindow(const AWinControl: TWinControl;
const CreateParams: TCreateParams; out Params: TCreateWindowExParams);
begin
with Params do
begin
Window := HWND(nil);
Buddy := HWND(nil);
WindowTitle := '';
SubClassWndProc := @WindowProc;
Flags := CreateParams.Style;
FlagsEx := CreateParams.ExStyle;
Parent := CreateParams.WndParent;
StrCaption := CreateParams.Caption;
Left := CreateParams.X;
Top := CreateParams.Y;
Width := CreateParams.Width;
Height := CreateParams.Height;
LCLBoundsToWin32Bounds(AWinControl, Left, Top, Width, Height);
SetStdBiDiModeParams(AWinControl, Params);
if not (csDesigning in AWinControl.ComponentState) and not AWinControl.IsEnabled then
Flags := Flags or WS_DISABLED;
{$IFDEF VerboseSizeMsg}
DebugLn('PrepareCreateWindow ' + dbgsName(AWinControl) + ' ' +
Format('%d, %d, %d, %d', [Left, Top, Width, Height]));
{$ENDIF}
end;
end;
procedure FinishCreateWindow(const AWinControl: TWinControl; var Params: TCreateWindowExParams;
const AlternateCreateWindow: boolean; SubClass: Boolean = False);
var
lhFont: HFONT;
AErrorCode: Cardinal;
NCCreateParams: TNCCreateParams;
WindowClassW, DummyClassW: WndClassW;
begin
NCCreateParams.DefWndProc := nil;
NCCreateParams.WinControl := AWinControl;
NCCreateParams.Handled := False;
if not AlternateCreateWindow then
begin
with Params do
begin
if SubClass then
begin
if GetClassInfoW(System.HInstance, PWideChar(WideString(pClassName)), @WindowClassW) then
begin
NCCreateParams.DefWndProc := WndProc(WindowClassW.lpfnWndProc);
if not GetClassInfoW(System.HInstance, PWideChar(WideString(pSubClassName)), @DummyClassW) then
begin
with WindowClassW do
begin
LPFnWndProc := SubClassWndProc;
hInstance := System.HInstance;
lpszClassName := PWideChar(WideString(pSubClassName));
end;
Windows.RegisterClassW(@WindowClassW);
end;
pClassName := pSubClassName;
end;
end;
Window := CreateWindowExW(FlagsEx, PWideChar(WideString(pClassName)),
PWideChar(UTF8ToUTF16(WindowTitle)), Flags,
Left, Top, Width, Height, Parent, 0, HInstance, @NCCreateParams);
if Window = 0 then
begin
AErrorCode := GetLastError;
DebugLn(['Failed to create win32 control, error: ', AErrorCode, ' : ', GetLastErrorText(AErrorCode)]);
raise Exception.Create('Failed to create win32 control, error: ' + IntToStr(AErrorCode) + ' : ' + GetLastErrorText(AErrorCode));
end;
end;
{ after creating a child window the following happens:
1) the previously bottom window is thrown to the top
2) the created window is added at the bottom
undo this by throwing them both to the bottom again }
{ not needed anymore, tab order is handled entirely by LCL now
Windows.SetWindowPos(Windows.GetTopWindow(Parent), HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE or SWP_NOSIZE);
Windows.SetWindowPos(Window, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE or SWP_NOSIZE);
}
end;
with Params do
begin
if Window <> 0 then
begin
// some controls (combobox) immediately send a message upon setting font
if not NCCreateParams.Handled then
begin
WindowInfo := AllocWindowInfo(Window);
WindowInfo^.needParentPaint := GetWin32WindowInfo(Parent)^.needParentPaint;
WindowInfo^.WinControl := AWinControl;
AWinControl.Handle := Window;
if Assigned(SubClassWndProc) then
WindowInfo^.DefWndProc := Windows.WNDPROC(SetWindowLong(
Window, GWL_WNDPROC, PtrInt(SubClassWndProc)));
// Set control ID to map WinControl. This is required for messages that sent to parent
// to extract control from the passed ID.
// In case of subclassing this ID will be set in WM_NCCREATE message handler
SetWindowLong(Window, GWL_ID, PtrInt(AWinControl));
end;
if AWinControl.Font.IsDefault then
lhFont := Win32WidgetSet.DefaultFont
else
lhFont := AWinControl.Font.Reference.Handle;
Windows.SendMessage(Window, WM_SETFONT, WPARAM(lhFont), 0);
end;
end;
end;
procedure WindowCreateInitBuddy(const AWinControl: TWinControl;
var Params: TCreateWindowExParams);
var
lhFont: HFONT;
begin
with Params do
if Buddy <> HWND(Nil) then
begin
BuddyWindowInfo := AllocWindowInfo(Buddy);
BuddyWindowInfo^.AWinControl := AWinControl;
BuddyWindowInfo^.DefWndProc := Windows.WNDPROC(SetWindowLong(
Buddy, GWL_WNDPROC, PtrInt(SubClassWndProc)));
if AWinControl.Font.IsDefault then
lhFont := Win32Widgetset.DefaultFont
else
lhFont := AWinControl.Font.Reference.Handle;
Windows.SendMessage(Buddy, WM_SETFONT, WPARAM(lhFont), 0);
end
else
BuddyWindowInfo := nil;
end;
procedure SetStdBiDiModeParams(const AWinControl: TWinControl; var Params:TCreateWindowExParams);
begin
with Params do
begin
//remove old bidimode ExFlags
FlagsEx := FlagsEx and not(WS_EX_RTLREADING or WS_EX_RIGHT or WS_EX_LEFTSCROLLBAR);
if AWinControl.UseRightToLeftAlignment then
FlagsEx := FlagsEx or WS_EX_RIGHT;
if AWinControl.UseRightToLeftScrollBar then
FlagsEx := FlagsEx or WS_EX_LEFTSCROLLBAR;
if AWinControl.UseRightToLeftReading then
FlagsEx := FlagsEx or WS_EX_RTLREADING;
end;
end;
{ TWin32WSWinControl }
class function TWin32WSWinControl.CreateHandle(const AWinControl: TWinControl;
const AParams: TCreateParams): HWND;
var
Params: TCreateWindowExParams;
begin
// general initialization of Params
PrepareCreateWindow(AWinControl, AParams, Params);
// customization of Params
with Params do
begin
pClassName := @ClsName[0];
SubClassWndProc := nil;
end;
// create window
FinishCreateWindow(AWinControl, Params, false);
Result := Params.Window;
end;
class procedure TWin32WSWinControl.AddControl(const AControl: TControl);
var
ParentHandle, ChildHandle: HWND;
begin
{$ifdef OldToolbar}
if (AControl.Parent is TToolbar) then
exit;
{$endif}
with TWinControl(AControl) do
begin
ParentHandle := Parent.Handle;
ChildHandle := Handle;
end;
Windows.SetParent(ChildHandle, ParentHandle);
end;
class function TWin32WSWinControl.GetText(const AWinControl: TWinControl; var AText: String): Boolean;
begin
AText := '';
Result := false;
end;
class procedure TWin32WSWinControl.SetBiDiMode(const AWinControl : TWinControl;
UseRightToLeftAlign, UseRightToLeftReading, UseRightToLeftScrollBar : Boolean
);
var
FlagsEx: dword;
begin
if not WSCheckHandleAllocated(AWinControl, 'SetBiDiMode') then
Exit;
FlagsEx := GetWindowLong(AWinControl.Handle, GWL_EXSTYLE);
FlagsEx := FlagsEx and not (WS_EX_RTLREADING or WS_EX_RIGHT or WS_EX_LEFTSCROLLBAR);
if UseRightToLeftAlign then
FlagsEx := FlagsEx or WS_EX_RIGHT;
if UseRightToLeftReading then
FlagsEx := FlagsEx or WS_EX_RTLREADING ;
if UseRightToLeftScrollBar then
FlagsEx := FlagsEx or WS_EX_LEFTSCROLLBAR;
SetWindowLong(AWinControl.Handle, GWL_EXSTYLE, FlagsEx);
end;
class procedure TWin32WSWinControl.SetBorderStyle(const AWinControl: TWinControl; const ABorderStyle: TBorderStyle);
begin
RecreateWnd(AWinControl);
if AWinControl.HandleObjectShouldBeVisible then
AWinControl.HandleNeeded;
end;
class procedure TWin32WSWinControl.SetChildZPosition(
const AWinControl, AChild: TWinControl; const AOldPos, ANewPos: Integer;
const AChildren: TFPList);
var
AfterWnd: hWnd;
n, StopPos: Integer;
Child: TWinControl;
WindowInfo: PWin32WindowInfo;
begin
if not WSCheckHandleAllocated(AWincontrol, 'SetChildZPosition')
then Exit;
if not WSCheckHandleAllocated(AChild, 'SetChildZPosition (child)')
then Exit;
if ANewPos = 0 // bottom
then AfterWnd := HWND_BOTTOM
else if ANewPos >= AChildren.Count - 1
then AfterWnd := HWND_TOP
else begin
// Search for the first child above us with a handle
// the child list is reversed form the windows order.
// So the first window is the top window and is the last child
// if we don't find a allocated handle then we are effectively not moved
AfterWnd := 0;
if AOldPos > ANewPos
then StopPos := AOldPos // The child is moved to the bottom, oldpos is on top of it
else StopPos := AChildren.Count - 1; // the child is moved to the top
for n := ANewPos + 1 to StopPos do
begin
Child := TWinControl(AChildren[n]);
if Child.HandleAllocated
then begin
AfterWnd := Child.Handle;
Break;
end;
end;
if AfterWnd = 0 then Exit; // nothing to do
end;
WindowInfo := GetWin32WindowInfo(AChild.Handle);
if WindowInfo^.UpDown <> 0 then
begin
Windows.SetWindowPos(WindowInfo^.UpDown, AfterWnd, 0, 0, 0, 0,
SWP_NOACTIVATE or SWP_NOMOVE or SWP_NOOWNERZORDER or
SWP_NOSIZE or SWP_NOSENDCHANGING or SWP_DEFERERASE);
Windows.SetWindowPos(AChild.Handle, WindowInfo^.UpDown, 0, 0, 0, 0,
SWP_NOACTIVATE or SWP_NOMOVE or SWP_NOOWNERZORDER or
SWP_NOSIZE or SWP_NOSENDCHANGING or SWP_DEFERERASE);
end
else
Windows.SetWindowPos(AChild.Handle, AfterWnd, 0, 0, 0, 0,
SWP_NOACTIVATE or SWP_NOMOVE or SWP_NOOWNERZORDER or
SWP_NOSIZE or SWP_NOSENDCHANGING or SWP_DEFERERASE);
end;
{------------------------------------------------------------------------------
Method: SetBounds
Params: AWinControl - the object which invoked this function
ALeft, ATop, AWidth, AHeight - new dimensions for the control
Pre: AWinControl.HandleAllocated
Returns: Nothing
Resize a window
------------------------------------------------------------------------------}
class procedure TWin32WSWinControl.SetBounds(const AWinControl: TWinControl;
const ALeft, ATop, AWidth, AHeight: Integer);
var
IntfLeft, IntfTop, IntfWidth, IntfHeight: integer;
suppressMove: boolean;
Handle: HWND;
WindowPlacement: TWINDOWPLACEMENT;
begin
IntfLeft := ALeft;
IntfTop := ATop;
IntfWidth := AWidth;
IntfHeight := AHeight;
LCLBoundsToWin32Bounds(AWinControl, IntfLeft, IntfTop, IntfWidth, IntfHeight);
{$IFDEF VerboseSizeMsg}
DebugLn('TWin32WSWinControl.ResizeWindow A ', dbgsName(AWinControl),
' LCL=',Format('%d, %d, %d, %d', [ALeft,ATop,AWidth,AHeight]),
' Win32=',Format('%d, %d, %d, %d', [IntfLeft,IntfTop,IntfWidth,IntfHeight])
);
{$ENDIF}
suppressMove := False;
AdaptBounds(AWinControl, IntfLeft, IntfTop, IntfWidth, IntfHeight, suppressMove);
if not suppressMove then
begin
Handle := AWinControl.Handle;
WindowPlacement.length := SizeOf(WindowPlacement);
if IsIconic(Handle) and GetWindowPlacement(Handle, @WindowPlacement) then
begin
WindowPlacement.rcNormalPosition := Bounds(IntfLeft, IntfTop, IntfWidth, IntfHeight);
SetWindowPlacement(Handle, @WindowPlacement);
end
else
Windows.SetWindowPos(Handle, 0, IntfLeft, IntfTop, IntfWidth, IntfHeight, SWP_NOZORDER or SWP_NOACTIVATE);
end;
LCLControlSizeNeedsUpdate(AWinControl, True);
end;
class procedure TWin32WSWinControl.SetColor(const AWinControl: TWinControl);
begin
// TODO: to be implemented, had no implementation in LM_SETCOLOR message
end;
class procedure TWin32WSWinControl.SetFont(const AWinControl: TWinControl; const AFont: TFont);
begin
if not WSCheckHandleAllocated(AWinControl, 'SetFont')
then Exit;
Windows.SendMessage(AWinControl.Handle, WM_SETFONT, Windows.WParam(AFont.Reference.Handle), 1);
end;
class procedure TWin32WSWinControl.SetText(const AWinControl: TWinControl; const AText: string);
begin
if not WSCheckHandleAllocated(AWincontrol, 'SetText') then Exit;
SendMessageW(AWinControl.Handle, WM_SETTEXT, 0, LPARAM(PWideChar(UTF8ToUTF16(AText))));
end;
class procedure TWin32WSWinControl.SetCursor(const AWinControl: TWinControl; const ACursor: HCursor);
var
CursorPos, P: TPoint;
h: HWND;
HitTestCode: LResult;
begin
// in win32 controls have no cursor property. they can change their cursor
// by listening WM_SETCURSOR and adjusting global cursor
if csDesigning in AWinControl.ComponentState then
begin
Windows.SetCursor(ACursor);
Exit;
end;
if Screen.Cursor <> crDefault then exit;
Windows.GetCursorPos(CursorPos);
h := AWinControl.Handle;
P := CursorPos;
Windows.ScreenToClient(h, @P);
h := Windows.ChildWindowFromPointEx(h, Windows.POINT(P), CWP_SKIPINVISIBLE or CWP_SKIPDISABLED);
HitTestCode := SendMessage(h, WM_NCHITTEST, 0, LParam((CursorPos.X and $FFFF) or (CursorPos.Y shl 16)));
SendMessage(h, WM_SETCURSOR, WParam(h), Windows.MAKELONG(HitTestCode, WM_MOUSEMOVE));
end;
class procedure TWin32WSWinControl.SetShape(const AWinControl: TWinControl;
const AShape: HBITMAP);
var
Rgn: HRGN;
begin
if not WSCheckHandleAllocated(AWinControl, 'SetShape') then
Exit;
if AShape <> 0 then
Rgn := BitmapToRegion(AShape)
else
Rgn := 0;
Windows.SetWindowRgn(AWinControl.Handle, Rgn, True);
if Rgn <> 0 then
DeleteObject(Rgn);
end;
class procedure TWin32WSWinControl.ConstraintsChange(const AWinControl: TWinControl);
begin
// TODO: implement me!
end;
class procedure TWin32WSWinControl.DestroyHandle(const AWinControl: TWinControl);
var
Handle: HWND;
begin
Handle := AWinControl.Handle;
{$ifdef RedirectDestroyMessages}
SetWindowLong(Handle, GWL_WNDPROC, PtrInt(@DestroyWindowProc));
{$endif}
DestroyWindow(Handle);
end;
class procedure TWin32WSWinControl.Invalidate(const AWinControl: TWinControl);
begin
// lpRect = nil updates entire client area of window
InvalidateRect(AWinControl.Handle, nil, True);
end;
class procedure TWin32WSWinControl.PaintTo(const AWinControl: TWinControl;
ADC: HDC; X, Y: Integer);
var
SavedDC: Integer;
begin
SavedDC := SaveDC(ADC);
MoveWindowOrgEx(ADC, X, Y);
SendMessage(AWinControl.Handle, WM_PRINT, WParam(ADC),
PRF_CHECKVISIBLE or PRF_CHILDREN or PRF_CLIENT or PRF_NONCLIENT or PRF_OWNED);
RestoreDC(ADC, SavedDC);
end;
class procedure TWin32WSWinControl.ShowHide(const AWinControl: TWinControl);
const
VisibilityToFlag: array[Boolean] of UINT = (SWP_HIDEWINDOW, SWP_SHOWWINDOW);
begin
Windows.SetWindowPos(AWinControl.Handle, 0, 0, 0, 0, 0,
SWP_NOSIZE or SWP_NOMOVE or SWP_NOZORDER or SWP_NOACTIVATE or VisibilityToFlag[AWinControl.HandleObjectShouldBeVisible])
end;
class procedure TWin32WSWinControl.ScrollBy(const AWinControl: TWinControl;
DeltaX, DeltaY: integer);
begin
if AWinControl.HandleAllocated then
ScrollWindowEx(AWinControl.Handle, DeltaX, DeltaY, nil, nil, 0, nil,
SW_INVALIDATE or SW_ERASE or SW_SCROLLCHILDREN);
end;
{ TWin32WSDragImageListResolution }
class function TWin32WSDragImageListResolution.BeginDrag(
const ADragImageList: TDragImageListResolution; Window: HWND; AIndex, X,
Y: Integer): Boolean;
begin
// No check to Handle should be done, because if there is no handle (no needed)
// we must create it here. This is normal for imagelist (we can never need handle)
Result := ImageList_BeginDrag(ADragImageList.Reference.Handle, AIndex, X, Y);
end;
class function TWin32WSDragImageListResolution.DragMove(const ADragImageList: TDragImageListResolution;
X, Y: Integer): Boolean;
begin
Result := ImageList_DragMove(X, Y);
end;
class procedure TWin32WSDragImageListResolution.EndDrag(const ADragImageList: TDragImageListResolution);
begin
ImageList_EndDrag;
end;
class function TWin32WSDragImageListResolution.HideDragImage(const ADragImageList: TDragImageListResolution;
ALockedWindow: HWND; DoUnLock: Boolean): Boolean;
begin
if DoUnLock then
Result := ImageList_DragLeave(ALockedWindow)
else
Result := ImageList_DragShowNolock(False);
end;
class function TWin32WSDragImageListResolution.ShowDragImage(const ADragImageList: TDragImageListResolution;
ALockedWindow: HWND; X, Y: Integer; DoLock: Boolean): Boolean;
begin
if DoLock then
Result := ImageList_DragEnter(ALockedWindow, X, Y)
else
Result := ImageList_DragShowNolock(True);
end;
end.
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