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CEF4Delphi/source/uCEFMenuButtonComponent.pas
Salvador Díaz Fau 318318c85c Added Views Framework support #244
Added ToolBoxBrowser2 demo
Added TCEFBrowserViewComponent.
Added TCEFLabelButtonComponent.
Added TCEFMenuButtonComponent.
Added TCEFPanelComponent.
Added TCEFTextfieldComponent.
Added TCEFScrollViewComponent.
Added TCEFWindowComponent.
2020-05-05 18:10:33 +02:00

224 lines
7.4 KiB
ObjectPascal

// ************************************************************************
// ***************************** 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 uCEFMenuButtonComponent;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
{$IFDEF MSWINDOWS}WinApi.Windows,{$ENDIF} System.Classes,
{$ELSE}
{$IFDEF MSWINDOWS}Windows,{$ENDIF} Classes,
{$IFDEF FPC}
LCLProc, LCLType, LCLIntf, LResources, InterfaceBase,
{$ENDIF}
{$ENDIF}
uCEFTypes, uCEFInterfaces, uCEFViewsFrameworkEvents, uCEFLabelButtonComponent;
type
{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
TCEFMenuButtonComponent = class(TCEFLabelButtonComponent, ICefMenuButtonDelegateEvents)
protected
FMenuButton : ICefMenuButton;
// ICefMenuButtonDelegateEvents
FOnMenuButtonPressed : TOnMenuButtonPressedEvent;
procedure DestroyView; override;
procedure Initialize; override;
function GetInitialized : boolean; override;
function GetAsView : ICefView; override;
function GetAsButton : ICefButton; override;
function GetAsLabelButton : ICefLabelButton; override;
function GetAsMenuButton : ICefMenuButton; override;
// ICefMenuButtonDelegateEvents
procedure doOnMenuButtonPressed(const menu_button: ICefMenuButton; const screen_point: TCefPoint; const button_pressed_lock: ICefMenuButtonPressedLock);
// ICefViewDelegateEvents
procedure doCreateCustomView; override;
public
procedure CreateMenuButton(const aText : ustring);
procedure ShowMenu(const menu_model: ICefMenuModel; const screen_point: TCefPoint; anchor_position: TCefMenuAnchorPosition);
procedure TriggerMenu;
published
property OnMenuButtonPressed : TOnMenuButtonPressedEvent read FOnMenuButtonPressed write FOnMenuButtonPressed;
end;
{$IFDEF FPC}
procedure Register;
{$ENDIF}
// *********************************************************
// ********************** ATTENTION ! **********************
// *********************************************************
// ** **
// ** MANY OF THE EVENTS IN CEF4DELPHI COMPONENTS LIKE **
// ** TCHROMIUM, TFMXCHROMIUM OR TCEFAPPLICATION ARE **
// ** EXECUTED IN A CEF THREAD BY DEFAULT. **
// ** **
// ** WINDOWS CONTROLS MUST BE CREATED AND DESTROYED IN **
// ** THE SAME THREAD TO AVOID ERRORS. **
// ** SOME OF THEM RECREATE THE HANDLERS IF THEY ARE **
// ** MODIFIED AND CAN CAUSE THE SAME ERRORS. **
// ** **
// ** DON'T CREATE, MODIFY OR DESTROY WINDOWS CONTROLS **
// ** INSIDE THE CEF4DELPHI EVENTS AND USE **
// ** SYNCHRONIZATION OBJECTS TO PROTECT VARIABLES AND **
// ** FIELDS IF THEY ARE ALSO USED IN THE MAIN THREAD. **
// ** **
// ** READ THIS FOR MORE INFORMATION : **
// ** https://www.briskbard.com/index.php?pageid=cef **
// ** **
// ** USE OUR FORUMS FOR MORE QUESTIONS : **
// ** https://www.briskbard.com/forum/ **
// ** **
// *********************************************************
// *********************************************************
implementation
uses
uCEFMenuButtonDelegate, uCEFMenuButton;
procedure TCEFMenuButtonComponent.CreateMenuButton(const aText : ustring);
begin
CreateLabelButton(aText);
end;
procedure TCEFMenuButtonComponent.doCreateCustomView;
var
TempDelegate : ICefMenuButtonDelegate;
begin
if (FMenuButton = nil) then
try
TempDelegate := TCustomMenuButtonDelegate.Create(self);
FMenuButton := TCefMenuButtonRef.CreateMenuButton(TempDelegate, FText);
finally
TempDelegate := nil;
end;
end;
procedure TCEFMenuButtonComponent.Initialize;
begin
inherited Initialize;
FMenuButton := nil;
FOnMenuButtonPressed := nil;
end;
procedure TCEFMenuButtonComponent.DestroyView;
begin
FMenuButton := nil;
end;
function TCEFMenuButtonComponent.GetInitialized : boolean;
begin
Result := (FMenuButton <> nil);
end;
function TCEFMenuButtonComponent.GetAsView : ICefView;
begin
Result := FMenuButton as ICefView;
end;
function TCEFMenuButtonComponent.GetAsButton : ICefButton;
begin
if Initialized then
Result := FMenuButton as ICefButton
else
Result := nil;
end;
function TCEFMenuButtonComponent.GetAsLabelButton : ICefLabelButton;
begin
if Initialized then
Result := FMenuButton as ICefLabelButton
else
Result := nil;
end;
function TCEFMenuButtonComponent.GetAsMenuButton : ICefMenuButton;
begin
Result := FMenuButton;
end;
procedure TCEFMenuButtonComponent.doOnMenuButtonPressed(const menu_button : ICefMenuButton;
const screen_point : TCefPoint;
const button_pressed_lock : ICefMenuButtonPressedLock);
begin
if assigned(FOnMenuButtonPressed) then
FOnMenuButtonPressed(self, menu_button, screen_point, button_pressed_lock);
end;
procedure TCEFMenuButtonComponent.ShowMenu(const menu_model : ICefMenuModel;
const screen_point : TCefPoint;
anchor_position : TCefMenuAnchorPosition);
begin
if Initialized then
FMenuButton.ShowMenu(menu_model, screen_point, anchor_position);
end;
procedure TCEFMenuButtonComponent.TriggerMenu;
begin
if Initialized then
FMenuButton.TriggerMenu;
end;
{$IFDEF FPC}
procedure Register;
begin
{$I res/tcefmenubuttoncomponent.lrs}
RegisterComponents('Chromium Views Framework', [TCEFMenuButtonComponent]);
end;
{$ENDIF}
end.