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CEF4Delphi/source/uCEFFMXWindowParent.pas

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// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF 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 � 2020 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 uCEFFMXWindowParent;
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
System.Classes, System.Types, System.UITypes,
{$IFDEF MSWINDOWS}
WinApi.Windows,
{$ENDIF}
FMX.Controls, FMX.Types, FMX.Forms;
type
{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
TFMXWindowParent = class(TCommonCustomForm)
protected
{$IFDEF MSWINDOWS}
function GetChildWindowHandle : HWND;
procedure UpdateSize;
{$ENDIF}
procedure Resize; override;
public
{$IFDEF MSWINDOWS}
procedure Reparent(const aNewParentHandle : TWindowHandle);
property ChildWindowHandle : HWND read GetChildWindowHandle;
{$ENDIF}
published
property Visible;
property Height;
property Width;
property Touch;
property OnGesture;
end;
implementation
// This class inherits from TCommonCustomForm because CEF needs a Windows handle
// to create the browser in normal mode.
// TFMXWindowParent has to be created and resized at runtime.
// It's also necessary to call "Reparent" to add this component as a child component to your form.
uses
System.SysUtils, FMX.Platform, FMX.Platform.Win;
procedure TFMXWindowParent.Resize;
begin
inherited Resize;
{$IFDEF MSWINDOWS}
UpdateSize;
{$ENDIF}
end;
{$IFDEF MSWINDOWS}
function TFMXWindowParent.GetChildWindowHandle : HWND;
var
TempHWND : HWND;
begin
TempHWND := FmxHandleToHWND(Handle);
Result := WinApi.Windows.GetWindow(TempHWND, GW_CHILD);
end;
procedure TFMXWindowParent.UpdateSize;
var
TempHWND, TempChildHWND : HWND;
TempRect : System.Types.TRect;
TempClientRect : TRectF;
begin
TempChildHWND := ChildWindowHandle;
if (TempChildHWND = 0) then exit;
TempHWND := BeginDeferWindowPos(1);
try
TempClientRect := ClientRect;
TempRect.Left := round(TempClientRect.Left);
TempRect.Top := round(TempClientRect.Top);
TempRect.Right := round(TempClientRect.Right);
TempRect.Bottom := round(TempClientRect.Bottom);
TempHWND := DeferWindowPos(TempHWND, TempChildHWND, HWND_TOP,
TempRect.left, TempRect.top, TempRect.right - TempRect.left, TempRect.bottom - TempRect.top,
SWP_NOZORDER);
finally
EndDeferWindowPos(TempHWND);
end;
end;
procedure TFMXWindowParent.Reparent(const aNewParentHandle : TWindowHandle);
var
TempChildHandle, TempParentHandle : HWND;
begin
if (aNewParentHandle <> nil) then
begin
TempChildHandle := FmxHandleToHWND(Handle);
TempParentHandle := FmxHandleToHWND(aNewParentHandle);
if (TempChildHandle <> 0) and (TempParentHandle <> 0) then
begin
SetWindowLong(TempChildHandle, GWL_STYLE, WS_CHILDWINDOW);
WinApi.Windows.SetParent(TempChildHandle, TempParentHandle);
end;
end;
end;
{$ENDIF}
end.