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CEF4Delphi/source/uCEFDragHandler.pas
Salvador Díaz Fau fd1e936198 Update to CEF 79.0.10
- Removed CEFSentinel from some demos because it's no longer necessary.
- Updated copyright year.
2020-01-01 12:48:10 +01:00

194 lines
6.9 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 uCEFDragHandler;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
type
TCefDragHandlerOwn = class(TCefBaseRefCountedOwn, ICefDragHandler)
protected
function OnDragEnter(const browser: ICefBrowser; const dragData: ICefDragData; mask: TCefDragOperations): Boolean; virtual;
procedure OnDraggableRegionsChanged(const browser: ICefBrowser; const frame: ICefFrame; regionsCount: NativeUInt; const regions: PCefDraggableRegionArray); virtual;
procedure RemoveReferences; virtual;
public
constructor Create; virtual;
end;
TCustomDragHandler = class(TCefDragHandlerOwn)
protected
FEvents : Pointer;
function OnDragEnter(const browser: ICefBrowser; const dragData: ICefDragData; mask: TCefDragOperations): Boolean; override;
procedure OnDraggableRegionsChanged(const browser: ICefBrowser; const frame: ICefFrame; regionsCount: NativeUInt; const regions: PCefDraggableRegionArray); override;
procedure RemoveReferences; override;
public
constructor Create(const events : IChromiumEvents); reintroduce; virtual;
destructor Destroy; override;
end;
implementation
uses
{$IFDEF DELPHI16_UP}
System.SysUtils,
{$ELSE}
SysUtils,
{$ENDIF}
uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFDragData, uCEFFrame;
function cef_drag_handler_on_drag_enter(self : PCefDragHandler;
browser : PCefBrowser;
dragData : PCefDragData;
mask : TCefDragOperations): Integer; stdcall;
var
TempObject : TObject;
begin
Result := Ord(False);
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefDragHandlerOwn) then
Result := Ord(TCefDragHandlerOwn(TempObject).OnDragEnter(TCefBrowserRef.UnWrap(browser),
TCefDragDataRef.UnWrap(dragData),
mask));
end;
procedure cef_drag_handler_on_draggable_regions_changed( self : PCefDragHandler;
browser : PCefBrowser;
frame : PCefFrame;
regionsCount : NativeUInt;
const regions : PCefDraggableRegionArray); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefDragHandlerOwn) then
TCefDragHandlerOwn(TempObject).OnDraggableRegionsChanged(TCefBrowserRef.UnWrap(browser),
TCefFrameRef.UnWrap(frame),
regionsCount,
regions);
end;
constructor TCefDragHandlerOwn.Create;
begin
inherited CreateData(SizeOf(TCefDragHandler));
with PCefDragHandler(FData)^ do
begin
on_drag_enter := {$IFDEF FPC}@{$ENDIF}cef_drag_handler_on_drag_enter;
on_draggable_regions_changed := {$IFDEF FPC}@{$ENDIF}cef_drag_handler_on_draggable_regions_changed;
end;
end;
function TCefDragHandlerOwn.OnDragEnter(const browser : ICefBrowser;
const dragData : ICefDragData;
mask : TCefDragOperations): Boolean;
begin
Result := False;
end;
procedure TCefDragHandlerOwn.OnDraggableRegionsChanged(const browser : ICefBrowser;
const frame : ICefFrame;
regionsCount : NativeUInt;
const regions : PCefDraggableRegionArray);
begin
//
end;
procedure TCefDragHandlerOwn.RemoveReferences;
begin
//
end;
// TCustomDragHandler
constructor TCustomDragHandler.Create(const events : IChromiumEvents);
begin
inherited Create;
FEvents := Pointer(events);
end;
destructor TCustomDragHandler.Destroy;
begin
RemoveReferences;
inherited Destroy;
end;
procedure TCustomDragHandler.RemoveReferences;
begin
FEvents := nil;
end;
function TCustomDragHandler.OnDragEnter(const browser : ICefBrowser;
const dragData : ICefDragData;
mask : TCefDragOperations): Boolean;
begin
if (FEvents <> nil) then
Result := IChromiumEvents(FEvents).doOnDragEnter(browser, dragData, mask)
else
Result := inherited OnDragEnter(browser, dragData, mask);
end;
procedure TCustomDragHandler.OnDraggableRegionsChanged(const browser : ICefBrowser;
const frame : ICefFrame;
regionsCount : NativeUInt;
const regions : PCefDraggableRegionArray);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnDraggableRegionsChanged(browser, frame, regionsCount, regions);
end;
end.