mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-12-14 09:42:54 +02:00
243 lines
7.5 KiB
ObjectPascal
243 lines
7.5 KiB
ObjectPascal
// ************************************************************************
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// ***************************** CEF4Delphi *******************************
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// ************************************************************************
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//
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// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
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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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// Copyright © 2021 Salvador Diaz Fau. All rights reserved.
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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 uCEFScrollViewComponent;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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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,
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{$ELSE}
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{$IFDEF MSWINDOWS}Windows,{$ENDIF} Classes,
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{$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, uCEFViewsFrameworkEvents, uCEFViewComponent;
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type
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{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
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TCEFScrollViewComponent = class(TCEFViewComponent)
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protected
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FScrollView : ICefScrollView;
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procedure DestroyView; override;
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procedure Initialize; override;
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function GetInitialized : boolean; override;
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function GetAsView : ICefView; override;
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function GetAsScrollView : ICefScrollView; override;
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function GetContentView : ICefView;
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function GetVisibleContentRect : TCefRect;
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function GetHasHorizontalScrollbar : boolean;
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function GetHorizontalScrollbarHeight : Integer;
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function GetHasVerticalScrollbar : boolean;
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function GetVerticalScrollbarWidth : Integer;
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procedure SetContentView(const view: ICefView);
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// ICefViewDelegateEvents
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procedure doCreateCustomView; override;
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public
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procedure CreateScrollView;
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property ContentView : ICefView read GetContentView write SetContentView;
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property VisibleContentRect : TCefRect read GetVisibleContentRect;
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property HorizontalScrollbarHeight : Integer read GetHorizontalScrollbarHeight;
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property VerticalScrollbarWidth : Integer read GetVerticalScrollbarWidth;
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property HasHorizontalScrollbar : boolean read GetHasHorizontalScrollbar;
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property HasVerticalScrollbar : boolean read GetHasVerticalScrollbar;
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end;
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{$IFDEF FPC}
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procedure Register;
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{$ENDIF}
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// *********************************************************
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// ********************** ATTENTION ! **********************
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// *********************************************************
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// ** **
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// ** MANY OF THE EVENTS IN CEF4DELPHI COMPONENTS LIKE **
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// ** TCHROMIUM, TFMXCHROMIUM OR TCEFAPPLICATION ARE **
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// ** EXECUTED IN A CEF THREAD BY DEFAULT. **
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// ** **
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// ** WINDOWS CONTROLS MUST BE CREATED AND DESTROYED IN **
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// ** THE SAME THREAD TO AVOID ERRORS. **
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// ** SOME OF THEM RECREATE THE HANDLERS IF THEY ARE **
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// ** MODIFIED AND CAN CAUSE THE SAME ERRORS. **
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// ** **
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// ** DON'T CREATE, MODIFY OR DESTROY WINDOWS CONTROLS **
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// ** INSIDE THE CEF4DELPHI EVENTS AND USE **
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// ** SYNCHRONIZATION OBJECTS TO PROTECT VARIABLES AND **
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// ** FIELDS IF THEY ARE ALSO USED IN THE MAIN THREAD. **
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// ** **
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// ** READ THIS FOR MORE INFORMATION : **
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// ** https://www.briskbard.com/index.php?pageid=cef **
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// ** **
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// ** USE OUR FORUMS FOR MORE QUESTIONS : **
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// ** https://www.briskbard.com/forum/ **
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// ** **
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// *********************************************************
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// *********************************************************
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implementation
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uses
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uCEFScrollView, uCEFMiscFunctions, uCEFViewDelegate;
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procedure TCEFScrollViewComponent.CreateScrollView;
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begin
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CreateView;
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end;
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procedure TCEFScrollViewComponent.doCreateCustomView;
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var
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TempDelegate : ICefViewDelegate;
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begin
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if (FScrollView = nil) then
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try
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TempDelegate := TCustomViewDelegate.Create(self);
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FScrollView := TCefScrollViewRef.CreateScrollView(TempDelegate);
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finally
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TempDelegate := nil;
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end;
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end;
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procedure TCEFScrollViewComponent.Initialize;
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begin
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inherited Initialize;
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FScrollView := nil;
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end;
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procedure TCEFScrollViewComponent.DestroyView;
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begin
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FScrollView := nil;
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end;
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function TCEFScrollViewComponent.GetInitialized : boolean;
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begin
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Result := (FScrollView <> nil);
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end;
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function TCEFScrollViewComponent.GetAsView : ICefView;
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begin
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Result := FScrollView as ICefView;
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end;
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function TCEFScrollViewComponent.GetAsScrollView : ICefScrollView;
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begin
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Result := FScrollView;
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end;
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procedure TCEFScrollViewComponent.SetContentView(const view: ICefView);
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begin
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if Initialized then FScrollView.SetContentView(view);
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end;
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function TCEFScrollViewComponent.GetContentView : ICefView;
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begin
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if Initialized then
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Result := FScrollView.GetContentView
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else
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Result := nil;
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end;
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function TCEFScrollViewComponent.GetVisibleContentRect : TCefRect;
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var
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TempRect : TCefRect;
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begin
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if Initialized then
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TempRect := FScrollView.GetVisibleContentRect
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else
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begin
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TempRect.x := 0;
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TempRect.y := 0;
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TempRect.width := 0;
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TempRect.height := 0;
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end;
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Result := TempRect;
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end;
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function TCEFScrollViewComponent.GetHasHorizontalScrollbar : boolean;
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begin
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Result := Initialized and FScrollView.HasHorizontalScrollbar;
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end;
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function TCEFScrollViewComponent.GetHorizontalScrollbarHeight : Integer;
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begin
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if Initialized then
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Result := FScrollView.GetHorizontalScrollbarHeight
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else
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Result := 0;
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end;
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function TCEFScrollViewComponent.GetHasVerticalScrollbar : boolean;
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begin
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Result := Initialized and FScrollView.HasVerticalScrollbar;
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end;
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function TCEFScrollViewComponent.GetVerticalScrollbarWidth : Integer;
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begin
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if Initialized then
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Result := FScrollView.GetVerticalScrollbarWidth
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else
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Result := 0;
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end;
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{$IFDEF FPC}
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procedure Register;
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begin
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{$I res/tcefscrollviewcomponent.lrs}
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RegisterComponents('Chromium Views Framework', [TCEFScrollViewComponent]);
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end;
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{$ENDIF}
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end.
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