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{
***************************************************************************
* *
* This source is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This code is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* A copy of the GNU General Public License is available on the World *
* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
* obtain it by writing to the Free Software Foundation, *
* Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA. *
* *
***************************************************************************
Author: Mattias Gaertner
Abstract:
TFrameDesignerForm is a designer form to design TFrame.
}
unit FrameDesigner;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Math,
// LCL
LCLProc, Graphics, GraphType, Forms, Controls,
// IdeIntf
FormEditingIntf,
// IDE
DesignerProcs, CustomNonFormDesigner;
type
{ TFrameDesignerForm }
TFrameDesignerForm = class(TCustomNonFormDesignerForm, INonFormDesigner, IFrameDesigner)
protected
FChangingBounds: Boolean;
FResizing: Boolean;
procedure SetLookupRoot(const AValue: TComponent); override;
procedure OnControlChangeBounds(Sender: TObject);
procedure OnControlResize(Sender: TObject);
public
procedure Create; override;
constructor Create(ANonFormProxyDesignerForm: TNonFormProxyDesignerForm); override;
destructor Destroy; override;
procedure DoLoadBounds; override;
procedure DoSaveBounds; override;
procedure SetBounds(aLeft, aTop, aWidth, aHeight: integer); override;
end;
implementation
{ TFrameDesignerForm }
destructor TFrameDesignerForm.Destroy;
begin
if LookupRoot is TControl then
TControl(LookupRoot).RemoveAllHandlersOfObject(Self);
inherited Destroy;
end;
procedure TFrameDesignerForm.SetLookupRoot(const AValue: TComponent);
var
AControl: TControl;
begin
if AValue = LookupRoot then Exit;
if LookupRoot is TControl then
TControl(LookupRoot).RemoveAllHandlersOfObject(Self);
if (AValue is TControl) then
begin
AControl := TControl(AValue);
AControl.Parent := NonFormProxyDesignerForm;
AControl.AddHandlerOnChangeBounds(@OnControlChangeBounds, True);
AControl.AddHandlerOnResize(@OnControlResize, True);
end;
inherited SetLookupRoot(AValue);
end;
procedure TFrameDesignerForm.OnControlChangeBounds(Sender: TObject);
var
AControl: TControl;
a: TAnchorKind;
begin
if FChangingBounds then Exit;
AControl := TControl(LookupRoot);
FChangingBounds := True;
try
// reset anchors
for a := Low(TAnchorKind) to High(TAnchorKind) do
AControl.AnchorSide[a].Control := nil;
// reset left, top but save width and height
NonFormProxyDesignerForm.SetLookupRootBounds(0, 0, AControl.Width, AControl.Height);
finally
FChangingBounds := False;
end;
end;
procedure TFrameDesignerForm.OnControlResize(Sender: TObject);
var
AControl: TControl;
begin
if FResizing then Exit;
AControl := TControl(LookupRoot);
FResizing := True;
try
// update form bounds
with NonFormProxyDesignerForm do
SetPublishedBounds(Left, Top, AControl.Width, AControl.Height);
finally
FResizing := False;
end;
end;
procedure TFrameDesignerForm.Create;
begin
inherited Create;
// workaround problem with assumption that Width = ClientWidth, Height = ClientHeight
NonFormProxyDesignerForm.AutoScroll := False;
end;
constructor TFrameDesignerForm.Create(
ANonFormProxyDesignerForm: TNonFormProxyDesignerForm);
begin
inherited Create(ANonFormProxyDesignerForm);
NonFormProxyDesignerForm.Position := poDesigned;
end;
procedure TFrameDesignerForm.DoLoadBounds;
procedure SetNewBounds(NewLeft, NewTop, NewWidth, NewHeight: integer);
begin
with NonFormProxyDesignerForm do
begin
if NewWidth <= 0 then NewWidth := Width;
if NewHeight <= 0 then NewHeight := Height;
if DockedDesigner then
begin
NewLeft:=Max(0,NewLeft);
NewTop:=Max(0,NewTop);
end
else
begin
NewWidth := Max(20, Min(NewWidth, Screen.Width - 50));
NewHeight := Max(20, Min(NewHeight, Screen.Height - 50));
end;
SetPublishedBounds(NewLeft, NewTop, NewWidth, NewHeight);
end;
end;
var
CurControl: TControl;
NewLeft: SmallInt;
NewTop: SmallInt;
begin
inherited;
if LookupRoot is TControl then
begin
CurControl := TControl(LookupRoot);
// restore designer position
DesignInfoToLeftTop(LookupRoot.DesignInfo, NewLeft, NewTop);
// resize designer form
SetNewBounds(NewLeft,NewTop,CurControl.Width,CurControl.Height);
//DebugLn(['TFrameDesignerForm.DoLoadBounds ',NewLeft,',',NewTop]);
end
else
if LookupRoot <> nil then
DebugLn(['Unsupported component type in TFrameDesignerForm.DoLoadBounds: ', LookupRoot.ClassName])
end;
procedure TFrameDesignerForm.DoSaveBounds;
begin
if LookupRoot is TControl then
with NonFormProxyDesignerForm do
begin
// store designer position
LookupRoot.DesignInfo := LeftTopToDesignInfo(Left, Top);
// always fill the whole designer form
SetLookupRootBounds(0, 0, Width, Height);
//DebugLn(['TFrameDesignerForm.DoSaveBounds ',Left,',',Top,' ',LazLongRec(LookupRoot.DesignInfo).Lo,',',LazLongRec(LookupRoot.DesignInfo).hi]);
end
else
if LookupRoot <> nil then
DebugLn(['Unsupported component type in TFrameDesignerForm.DoSaveBounds: ', LookupRoot.ClassName]);
inherited;
end;
procedure TFrameDesignerForm.SetBounds(aLeft, aTop, aWidth, aHeight: integer);
begin
// auto apply width and height
inherited SetBounds(aLeft, aTop, aWidth, aHeight);
with NonFormProxyDesignerForm do
SetLookupRootBounds(0, 0, Width, Height);
end;
end.
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