1
0
mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-04 09:26:52 +02:00
CEF4Delphi/source/uCEFLinkedWindowParent.pas
2019-03-15 17:17:14 +01:00

169 lines
4.7 KiB
ObjectPascal

// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 to embed a chromium-based
// browser in Delphi applications.
//
// The original license of DCEF3 still applies to CEF4Delphi.
//
// For more information about CEF4Delphi visit :
// https://www.briskbard.com/index.php?lang=en&pageid=cef
//
// Copyright © 2019 Salvador Diaz Fau. All rights reserved.
//
// ************************************************************************
// ************ vvvv Original license and comments below vvvv *************
// ************************************************************************
(*
* Delphi Chromium Embedded 3
*
* Usage allowed under the restrictions of the Lesser GNU General Public License
* or alternatively the restrictions of the Mozilla Public License 1.1
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
* Web site : http://www.progdigy.com
* Repository : http://code.google.com/p/delphichromiumembedded/
* Group : http://groups.google.com/group/delphichromiumembedded
*
* Embarcadero Technologies, Inc is not permitted to use or redistribute
* this source code without explicit permission.
*
*)
unit uCEFLinkedWindowParent;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
{$IFDEF MSWINDOWS}WinApi.Windows, WinApi.Messages,{$ENDIF} System.Classes, Vcl.Controls, Vcl.Graphics,
{$ELSE}
{$IFDEF MSWINDOWS}Windows,{$ENDIF} Classes, Forms, Controls, Graphics,
{$IFDEF FPC}
LCLProc, LCLType, LCLIntf, LResources, LMessages, InterfaceBase,
{$ELSE}
Messages,
{$ENDIF}
{$ENDIF}
uCEFWinControl, uCEFTypes, uCEFInterfaces, uCEFChromium;
type
{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
TCEFLinkedWindowParent = class(TCEFWinControl)
protected
FChromium : TChromium;
procedure SetChromium(aValue : TChromium);
function GetChildWindowHandle : THandle; override;
{$IFDEF MSWINDOWS}
procedure WndProc(var aMessage: TMessage); override;
{$ENDIF}
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
public
constructor Create(AOwner : TComponent); override;
published
property Chromium : TChromium read FChromium write SetChromium;
end;
{$IFDEF FPC}
procedure Register;
{$ENDIF}
implementation
uses
uCEFMiscFunctions, uCEFClient, uCEFConstants;
constructor TCEFLinkedWindowParent.Create(AOwner : TComponent);
begin
inherited Create(AOwner);
FChromium := nil;
end;
function TCEFLinkedWindowParent.GetChildWindowHandle : THandle;
begin
Result := 0;
if (FChromium <> nil) then Result := FChromium.WindowHandle;
if (Result = 0) then Result := inherited GetChildWindowHandle;
end;
{$IFDEF MSWINDOWS}
procedure TCEFLinkedWindowParent.WndProc(var aMessage: TMessage);
var
TempHandle : THandle;
begin
case aMessage.Msg of
WM_SETFOCUS:
begin
if (FChromium <> nil) then
FChromium.SetFocus(True)
else
begin
TempHandle := ChildWindowHandle;
if (TempHandle <> 0) then PostMessage(TempHandle, WM_SETFOCUS, aMessage.WParam, 0);
end;
inherited WndProc(aMessage);
end;
WM_ERASEBKGND:
if (ChildWindowHandle = 0) then inherited WndProc(aMessage);
CM_WANTSPECIALKEY:
if not(TWMKey(aMessage).CharCode in [VK_LEFT .. VK_DOWN, VK_RETURN, VK_ESCAPE]) then
aMessage.Result := 1
else
inherited WndProc(aMessage);
WM_GETDLGCODE : aMessage.Result := DLGC_WANTARROWS or DLGC_WANTCHARS;
else inherited WndProc(aMessage);
end;
end;
{$ENDIF}
procedure TCEFLinkedWindowParent.Notification(AComponent: TComponent; Operation: TOperation);
begin
inherited Notification(AComponent, Operation);
if (Operation = opRemove) and (AComponent = FChromium) then FChromium := nil;
end;
procedure TCEFLinkedWindowParent.SetChromium(aValue : TChromium);
begin
FChromium := aValue;
if (aValue <> nil) then aValue.FreeNotification(Self);
end;
{$IFDEF FPC}
procedure Register;
begin
{$I res/tceflinkedwindowparent.lrs}
RegisterComponents('Chromium', [TCEFLinkedWindowParent]);
end;
{$ENDIF}
end.