2018-09-16 10:39:41 +02:00
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// ************************************************************************
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// ***************************** CEF4Delphi *******************************
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// ************************************************************************
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//
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2019-10-19 10:58:34 +02:00
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// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
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2018-09-16 10:39:41 +02:00
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// browser in Delphi applications.
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//
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// The original license of DCEF3 still applies to CEF4Delphi.
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//
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// For more information about CEF4Delphi visit :
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// https://www.briskbard.com/index.php?lang=en&pageid=cef
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//
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2020-01-01 13:48:10 +02:00
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// Copyright � 2020 Salvador Diaz Fau. All rights reserved.
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2018-09-16 10:39:41 +02:00
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//
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// ************************************************************************
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// ************ vvvv Original license and comments below vvvv *************
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// ************************************************************************
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(*
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* Delphi Chromium Embedded 3
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*
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* Usage allowed under the restrictions of the Lesser GNU General Public License
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* or alternatively the restrictions of the Mozilla Public License 1.1
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
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* the specific language governing rights and limitations under the License.
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*
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* Unit owner : Henri Gourvest <hgourvest@gmail.com>
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* Web site : http://www.progdigy.com
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* Repository : http://code.google.com/p/delphichromiumembedded/
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* Group : http://groups.google.com/group/delphichromiumembedded
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*
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* Embarcadero Technologies, Inc is not permitted to use or redistribute
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* this source code without explicit permission.
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*
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*)
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unit uCEFWinControl;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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2018-11-22 16:02:21 +02:00
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{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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{$I cef.inc}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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{$IFDEF MSWINDOWS}WinApi.Windows, {$ENDIF} System.Classes, Vcl.Controls, Vcl.Graphics,
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{$ELSE}
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{$IFDEF MSWINDOWS}Windows,{$ENDIF} Classes, Forms, Controls, Graphics,
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{$IFDEF FPC}
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LCLProc, LCLType, LCLIntf, LResources, InterfaceBase,
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{$ENDIF}
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{$ENDIF}
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uCEFTypes, uCEFInterfaces;
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type
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TCEFWinControl = class(TWinControl)
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protected
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function GetChildWindowHandle : THandle; virtual;
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procedure Resize; override;
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public
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2019-03-15 18:17:14 +02:00
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function TakeSnapshot(var aBitmap : TBitmap) : boolean;
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function DestroyChildWindow : boolean;
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procedure CreateHandle; override;
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procedure InvalidateChildren;
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procedure UpdateSize;
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2018-09-16 10:39:41 +02:00
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2019-03-15 18:17:14 +02:00
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property ChildWindowHandle : THandle read GetChildWindowHandle;
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2018-09-16 10:39:41 +02:00
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published
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property Align;
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property Anchors;
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property Color;
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property Constraints;
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property TabStop;
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property TabOrder;
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property Visible;
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property Enabled;
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property ShowHint;
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property Hint;
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property OnResize;
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property DoubleBuffered;
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{$IFDEF DELPHI12_UP}
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property ParentDoubleBuffered;
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{$ENDIF}
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end;
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implementation
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uses
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uCEFMiscFunctions, uCEFClient, uCEFConstants;
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function TCEFWinControl.GetChildWindowHandle : THandle;
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begin
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{$IFDEF MSWINDOWS}
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if not(csDesigning in ComponentState) and HandleAllocated then
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Result := GetWindow(Handle, GW_CHILD)
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else
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{$ENDIF}
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Result := 0;
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end;
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procedure TCEFWinControl.CreateHandle;
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begin
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inherited CreateHandle;
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end;
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2018-10-20 20:43:06 +02:00
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procedure TCEFWinControl.InvalidateChildren;
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begin
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if HandleAllocated then RedrawWindow(Handle, nil, 0, RDW_INVALIDATE or RDW_ALLCHILDREN);
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end;
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procedure TCEFWinControl.UpdateSize;
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var
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TempRect : TRect;
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TempHWND : THandle;
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begin
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TempHWND := ChildWindowHandle;
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if (TempHWND = 0) then exit;
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TempRect := GetClientRect;
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SetWindowPos(TempHWND, 0,
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0, 0, TempRect.right, TempRect.bottom,
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SWP_NOZORDER);
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end;
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function TCEFWinControl.TakeSnapshot(var aBitmap : TBitmap) : boolean;
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{$IFDEF MSWINDOWS}
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var
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TempHWND : HWND;
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TempDC : HDC;
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TempRect : TRect;
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TempWidth : Integer;
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TempHeight : Integer;
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{$ENDIF}
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begin
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Result := False;
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{$IFDEF MSWINDOWS}
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if (aBitmap = nil) then exit;
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TempHWND := ChildWindowHandle;
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if (TempHWND = 0) then exit;
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{$IFDEF DELPHI16_UP}Winapi.{$ENDIF}Windows.GetClientRect(TempHWND, TempRect);
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TempDC := GetDC(TempHWND);
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TempWidth := TempRect.Right - TempRect.Left;
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TempHeight := TempRect.Bottom - TempRect.Top;
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aBitmap := TBitmap.Create;
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aBitmap.Height := TempHeight;
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aBitmap.Width := TempWidth;
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Result := BitBlt(aBitmap.Canvas.Handle, 0, 0, TempWidth, TempHeight,
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TempDC, 0, 0, SRCCOPY);
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ReleaseDC(TempHWND, TempDC);
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{$ENDIF}
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end;
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function TCEFWinControl.DestroyChildWindow : boolean;
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{$IFDEF MSWINDOWS}
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var
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TempHWND : HWND;
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{$ENDIF}
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begin
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{$IFDEF MSWINDOWS}
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TempHWND := ChildWindowHandle;
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Result := (TempHWND <> 0) and DestroyWindow(TempHWND);
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{$ELSE}
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Result := False;
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{$ENDIF}
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end;
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procedure TCEFWinControl.Resize;
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begin
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inherited Resize;
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UpdateSize;
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end;
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end.
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