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Update to CEF 78.2.10
- CustomTitleBar demo moved to the Javascript directory - Fixed issue #189
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@ -0,0 +1,521 @@
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// ************************************************************************
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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 � 2017 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 uCustomTitleBarExtension;
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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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Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
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System.Classes, Vcl.Graphics,
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Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls,
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Vcl.ComCtrls,
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{$ELSE}
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Windows, Messages, SysUtils, Variants, Classes, Graphics,
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Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ComCtrls,
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{$ENDIF}
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uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes,
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uCEFConstants,
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uCEFWinControl, uCEFSentinel;
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const
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MINIBROWSER_SHOWTEXTVIEWER = WM_APP + $100;
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MINIBROWSER_JSBINPARAM = WM_APP + $103;
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MINIBROWSER_CONTEXTMENU_SETJSEVENT = MENU_ID_USER_FIRST + 1;
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MINIBROWSER_CONTEXTMENU_JSVISITDOM = MENU_ID_USER_FIRST + 2;
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MINIBROWSER_CONTEXTMENU_MUTATIONOBSERVER = MENU_ID_USER_FIRST + 3;
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MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS = MENU_ID_USER_FIRST + 4;
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MOUSEOVER_MESSAGE_NAME = 'mousestate';
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WINDOW_MINIMIZE_MESSAGE = 'minimize';
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WINDOW_MAXIMIZE_MESSAGE = 'maximize';
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WINDOW_CLOSE_MESSAGE = 'close';
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BINARY_PARAM_JS = 'JSBinaryParameter';
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type
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TCTBForm = class(TForm)
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CEFWindowParent1: TCEFWindowParent;
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Chromium1: TChromium;
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Timer1: TTimer;
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CEFSentinel1: TCEFSentinel;
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Timer2: TTimer;
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procedure FormShow(Sender: TObject);
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procedure GoBtnClick(Sender: TObject);
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procedure Chromium1BeforeContextMenu(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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const params: ICefContextMenuParams; const model: ICefMenuModel);
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procedure Chromium1ContextMenuCommand(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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const params: ICefContextMenuParams; commandId: Integer;
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eventFlags: Cardinal; out Result: Boolean);
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procedure Chromium1ProcessMessageReceived(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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sourceProcess: TCefProcessId; const message: ICefProcessMessage;
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out Result: Boolean);
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procedure Chromium1AfterCreated(Sender: TObject;
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const browser: ICefBrowser);
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procedure Timer1Timer(Sender: TObject);
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procedure Chromium1BeforePopup(Sender: TObject; const browser: ICefBrowser;
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const frame: ICefFrame; const targetUrl, targetFrameName: ustring;
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targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean;
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const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo;
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var client: ICefClient; var settings: TCefBrowserSettings;
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var extra_info: ICefDictionaryValue; var noJavascriptAccess: Boolean;
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var Result: Boolean);
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procedure FormCreate(Sender: TObject);
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procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser;
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var aAction: TCefCloseBrowserAction);
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procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
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procedure CEFSentinel1Close(Sender: TObject);
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procedure executeJS(frame: ICefFrame);
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procedure Timer2Timer(Sender: TObject);
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procedure Button1Click(Sender: TObject);
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procedure Chromium1LoadEnd(Sender: TObject; const browser: ICefBrowser;
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const frame: ICefFrame; httpStatusCode: Integer);
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protected
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tp, tpc: TPoint;
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mouseDrag: Boolean;
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FText: string;
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// Variables to control when can we destroy the form safely
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FCanClose: Boolean; // Set to True in TChromium.OnBeforeClose
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FClosing: Boolean; // Set to True in the CloseQuery event.
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procedure BrowserCreatedMsg(var aMessage: TMessage);
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message CEF_AFTERCREATED;
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procedure BrowserDestroyMsg(var aMessage: TMessage); message CEF_DESTROY;
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procedure ShowTextViewerMsg(var aMessage: TMessage);
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message MINIBROWSER_SHOWTEXTVIEWER;
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procedure EvalJSBinParamMsg(var aMessage: TMessage);
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message MINIBROWSER_JSBINPARAM;
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procedure WMMove(var aMessage: TWMMove); message WM_MOVE;
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procedure WMMoving(var aMessage: TMessage); message WM_MOVING;
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public
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{ Public declarations }
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end;
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var
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CTBForm: TCTBForm;
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procedure CreateGlobalCEFApp;
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implementation
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{$R *.dfm}
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uses
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uCefBinaryValue, uCefProcessMessage, uCEFv8Handler, uTestExtension,
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uCEFMiscFunctions;
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// Please, read the code comments in the JSExtension demo (uJSExtension.pas) before using this demo!
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// This demo is almost identical to JSExtension but it uses a slightly easier
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// way to register JavaScript extensions inherited from the DCEF3 project.
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// Instead of creating a custom class inherited from TCefv8HandlerOwn and calling the
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// CefRegisterExtension function, this demo uses the TCefRTTIExtension.Register
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// class procedure to register the TTestExtension class, which is a custom Delphi
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// class with 2 class procedures.
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// TCefRTTIExtension uses the RTTI from the TTestExtension class to generate the
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// JS code and the ICefv8Handler parameters needed by CefRegisterExtension.
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// You still need to call TCefRTTIExtension.Register in the GlobalCEFApp.OnWebKitInitialized event
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// and use process messages to send information between processes.
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// TTestExtension can send information back to the browser with a process message.
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// The TTestExtension.mouseover function do this by calling
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// TCefv8ContextRef.Current.Browser.MainFrame.SendProcessMessage(PID_BROWSER, msg);
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// That message is received in the TChromium.OnProcessMessageReceived event.
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// Destruction steps
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// =================
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// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
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// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 in the main thread, which triggers the TChromium.OnBeforeClose event.
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// 3. TChromium.OnBeforeClose calls TCEFSentinel.Start, which will trigger TCEFSentinel.OnClose when the renderer processes are closed.
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// 4. TCEFSentinel.OnClose sets FCanClose := True and sends WM_CLOSE to the form.
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procedure GlobalCEFApp_OnWebKitInitialized;
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begin
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{$IFDEF DELPHI14_UP}
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// Registering the extension. Read this document for more details :
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// https://bitbucket.org/chromiumembedded/cef/wiki/JavaScriptIntegration.md
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if TCefRTTIExtension.Register('myextension', TTestExtension) then
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{$IFDEF DEBUG}CefDebugLog('JavaScript extension registered successfully!'){$ENDIF}
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else
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{$IFDEF DEBUG}CefDebugLog('There was an error registering the JavaScript extension!'){$ENDIF};
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{$ENDIF}
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end;
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procedure CreateGlobalCEFApp;
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begin
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GlobalCEFApp := TCefApplication.Create;
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GlobalCEFApp.OnWebKitInitialized := GlobalCEFApp_OnWebKitInitialized;
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{$IFDEF DEBUG}
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GlobalCEFApp.LogFile := 'debug.log';
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GlobalCEFApp.LogSeverity := LOGSEVERITY_INFO;
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{$ENDIF}
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end;
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procedure TCTBForm.GoBtnClick(Sender: TObject);
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begin
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Chromium1.LoadURL('file:///app_view.html');
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end;
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procedure TCTBForm.CEFSentinel1Close(Sender: TObject);
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begin
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FCanClose := True;
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PostMessage(Handle, WM_CLOSE, 0, 0);
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end;
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procedure TCTBForm.Chromium1AfterCreated(Sender: TObject;
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const browser: ICefBrowser);
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begin
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PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
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CTBForm.executeJS(Chromium1.browser.MainFrame);
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end;
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procedure TCTBForm.Chromium1BeforeContextMenu(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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const params: ICefContextMenuParams; const model: ICefMenuModel);
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begin
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// Adding some custom context menu entries
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model.AddSeparator;
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model.AddItem(MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS, 'Show DevTools');
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end;
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procedure TCTBForm.Chromium1BeforePopup(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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const targetUrl, targetFrameName: ustring;
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targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean;
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const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo;
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var client: ICefClient; var settings: TCefBrowserSettings;
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var extra_info: ICefDictionaryValue; var noJavascriptAccess: Boolean;
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var Result: Boolean);
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begin
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// For simplicity, this demo blocks all popup windows and new tabs
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Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB,
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WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
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end;
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procedure TCTBForm.executeJS(frame: ICefFrame);
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var
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TempJSCode: string;
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begin
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if (frame <> nil) and frame.IsValid then
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begin
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TempJSCode := 'document.body.addEventListener("mousedown", function(evt){' +
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'myextension.mousestate(getComputedStyle(evt.target).webkitAppRegion)' +
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'});' + chr(13);
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TempJSCode := TempJSCode + ' setAppCaption("' + CTBForm.caption + '");';
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frame.ExecuteJavaScript(TempJSCode, 'about:blank', 0);
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end;
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end;
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procedure TCTBForm.Chromium1ContextMenuCommand(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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const params: ICefContextMenuParams; commandId: Integer; eventFlags: Cardinal;
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out Result: Boolean);
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const
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ELEMENT_ID = 'keywords';
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// ID attribute in the search box at https://www.briskbard.com/forum/
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var
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TempPoint: TPoint;
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begin
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Result := False;
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// Here is the code executed for each custom context menu entry
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case commandId of
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MINIBROWSER_CONTEXTMENU_SETJSEVENT:
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CTBForm.executeJS(frame);
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MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS:
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begin
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TempPoint.x := params.XCoord;
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TempPoint.y := params.YCoord;
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Chromium1.ShowDevTools(TempPoint, nil);
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end;
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end;
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end;
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procedure TCTBForm.EvalJSBinParamMsg(var aMessage: TMessage);
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var
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TempMsg: ICefProcessMessage;
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TempOpenDialog: TOpenDialog;
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TempStream: TFileStream;
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TempBinValue: ICefBinaryValue;
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TempBuffer: TBytes;
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TempSize: NativeUInt;
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TempPointer: pointer;
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begin
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TempOpenDialog := nil;
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TempStream := nil;
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try
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try
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TempOpenDialog := TOpenDialog.Create(nil);
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TempOpenDialog.Filter := 'JPEG files (*.jpg)|*.JPG';
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if TempOpenDialog.Execute then
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begin
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TempStream := TFileStream.Create(TempOpenDialog.FileName, fmOpenRead);
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TempSize := TempStream.Size;
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if (TempSize > 0) then
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begin
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SetLength(TempBuffer, TempSize);
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TempSize := TempStream.Read(TempBuffer, TempSize);
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if (TempSize > 0) then
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begin
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TempPointer := @TempBuffer[0];
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TempBinValue := TCefBinaryValueRef.New(TempPointer, TempSize);
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TempMsg := TCefProcessMessageRef.New(BINARY_PARAM_JS);
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if TempMsg.ArgumentList.SetBinary(0, TempBinValue) then
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Chromium1.SendProcessMessage(PID_RENDERER, TempMsg);
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end;
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end;
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end;
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except
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on e: exception do
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if CustomExceptionHandler('TCTBForm.EvalJSBinParamMsg', e) then
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raise;
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end;
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finally
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if (TempOpenDialog <> nil) then
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FreeAndNil(TempOpenDialog);
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if (TempStream <> nil) then
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FreeAndNil(TempStream);
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SetLength(TempBuffer, 0);
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end;
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end;
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procedure TCTBForm.Chromium1LoadEnd(Sender: TObject; const browser: ICefBrowser;
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const frame: ICefFrame; httpStatusCode: Integer);
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begin
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CTBForm.executeJS(Chromium1.browser.MainFrame);
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end;
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procedure TCTBForm.Chromium1ProcessMessageReceived(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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sourceProcess: TCefProcessId; const message: ICefProcessMessage;
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out Result: Boolean);
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begin
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Result := False;
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if (message = nil) or (message.ArgumentList = nil) then
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exit;
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// This function receives the messages with the JavaScript results
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// Many of these events are received in different threads and the VCL
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// doesn't like to create and destroy components in different threads.
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// It's safer to store the results and send a message to the main thread to show them.
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// The message names are defined in the extension or in JS code.
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if (message.Name = MOUSEOVER_MESSAGE_NAME) then
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begin
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tp := Mouse.CursorPos;
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tp := CTBForm.ScreenToClient(tp);
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mouseDrag := False;
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if message.ArgumentList.GetString(0) = 'drag' then
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begin
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mouseDrag := True;
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Timer2.Enabled := True;
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end;
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Result := True;
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end;
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if (message.Name = WINDOW_MINIMIZE_MESSAGE) then
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begin
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CTBForm.WindowState := wsMinimized;
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end;
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if (message.Name = WINDOW_MAXIMIZE_MESSAGE) then
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begin
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if CTBForm.WindowState = wsNormal then
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begin
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CTBForm.WindowState := wsMaximized;
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end
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else if CTBForm.WindowState = wsMaximized then
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CTBForm.WindowState := wsNormal;
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end;
|
||||
|
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if (message.Name = WINDOW_CLOSE_MESSAGE) then
|
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begin
|
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CTBForm.close;
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end;
|
||||
|
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end;
|
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|
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procedure TCTBForm.FormShow(Sender: TObject);
|
||||
begin
|
||||
|
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Chromium1.DefaultURL := 'file:///app_view.html';
|
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|
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// GlobalCEFApp.GlobalContextInitialized has to be TRUE before creating any browser
|
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// If it's not initialized yet, we use a simple timer to create the browser later.
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if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) then
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Timer1.Enabled := True;
|
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|
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end;
|
||||
|
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procedure TCTBForm.WMMove(var aMessage: TWMMove);
|
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begin
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inherited;
|
||||
|
||||
if (Chromium1 <> nil) then
|
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Chromium1.NotifyMoveOrResizeStarted;
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||||
end;
|
||||
|
||||
procedure TCTBForm.WMMoving(var aMessage: TMessage);
|
||||
begin
|
||||
inherited;
|
||||
|
||||
if (Chromium1 <> nil) then
|
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Chromium1.NotifyMoveOrResizeStarted;
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||||
end;
|
||||
|
||||
procedure TCTBForm.ShowTextViewerMsg(var aMessage: TMessage);
|
||||
begin
|
||||
|
||||
end;
|
||||
|
||||
procedure TCTBForm.Timer1Timer(Sender: TObject);
|
||||
begin
|
||||
Timer1.Enabled := False;
|
||||
if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) and
|
||||
not(Chromium1.Initialized) then
|
||||
begin
|
||||
Timer1.Enabled := True;
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure TCTBForm.BrowserCreatedMsg(var aMessage: TMessage);
|
||||
begin
|
||||
|
||||
CEFWindowParent1.UpdateSize;
|
||||
|
||||
end;
|
||||
|
||||
procedure TCTBForm.Chromium1BeforeClose(Sender: TObject;
|
||||
const browser: ICefBrowser);
|
||||
begin
|
||||
CEFSentinel1.Start;
|
||||
end;
|
||||
|
||||
procedure TCTBForm.Chromium1Close(Sender: TObject; const browser: ICefBrowser;
|
||||
var aAction: TCefCloseBrowserAction);
|
||||
begin
|
||||
PostMessage(Handle, CEF_DESTROY, 0, 0);
|
||||
aAction := cbaDelay;
|
||||
end;
|
||||
|
||||
procedure TCTBForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
|
||||
begin
|
||||
CanClose := FCanClose;
|
||||
|
||||
if not(FClosing) then
|
||||
begin
|
||||
FClosing := True;
|
||||
Visible := False;
|
||||
Chromium1.CloseBrowser(True);
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure TCTBForm.FormCreate(Sender: TObject);
|
||||
begin
|
||||
FCanClose := False;
|
||||
FClosing := False;
|
||||
end;
|
||||
|
||||
procedure TCTBForm.BrowserDestroyMsg(var aMessage: TMessage);
|
||||
begin
|
||||
CEFWindowParent1.Free;
|
||||
end;
|
||||
|
||||
procedure TCTBForm.Button1Click(Sender: TObject);
|
||||
begin
|
||||
|
||||
end;
|
||||
|
||||
/// ////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
procedure TCTBForm.Timer2Timer(Sender: TObject);
|
||||
var
|
||||
MouseLBtnDown: Boolean;
|
||||
begin
|
||||
tpc := Mouse.CursorPos;
|
||||
|
||||
MouseLBtnDown := (GetKeyState(VK_LBUTTON) < 0);
|
||||
|
||||
if not MouseLBtnDown then
|
||||
begin
|
||||
mouseDrag := False;
|
||||
Timer2.Enabled := False;
|
||||
end;
|
||||
|
||||
if mouseDrag then
|
||||
begin
|
||||
CTBForm.Left := tpc.x - tp.x;
|
||||
CTBForm.top := tpc.y - tp.y;
|
||||
end;
|
||||
|
||||
end;
|
||||
|
||||
end.
|
Reference in New Issue
Block a user