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Update to CEF 74.1.19
- Converted almost all the demos to Lazarus thanks to avra - Reorganized "demos" directory.
This commit is contained in:
Salvador Díaz Fau
211
demos/Delphi_VCL/DLLBrowser/uWebBrowser.pas
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211
demos/Delphi_VCL/DLLBrowser/uWebBrowser.pas
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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 CEF3 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 � 2019 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 uWebBrowser;
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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, System.Classes, Vcl.Graphics,
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Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls,
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{$ELSE}
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Windows, Messages, SysUtils, Variants, Classes, Graphics,
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Controls, Forms, Dialogs, ExtCtrls,
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{$ENDIF}
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uCEFApplication, uCEFWindowParent, uCEFChromiumWindow, uCEFInterfaces, uCEFTypes, uCEFConstants;
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type
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TWebBrowserFrm = class(TForm)
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ChromiumWindow1: TChromiumWindow;
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Timer1: TTimer;
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procedure FormShow(Sender: TObject);
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procedure ChromiumWindow1AfterCreated(Sender: TObject);
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procedure Chromium_OnBeforePopup(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
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targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition;
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userGesture: Boolean; const popupFeatures: TCefPopupFeatures;
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var windowInfo: TCefWindowInfo; var client: ICefClient;
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var settings: TCefBrowserSettings; var noJavascriptAccess: Boolean;
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var Result: Boolean);
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procedure Timer1Timer(Sender: TObject);
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procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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procedure FormCreate(Sender: TObject);
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procedure ChromiumWindow1BeforeClose(Sender: TObject);
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procedure ChromiumWindow1Close(Sender: TObject);
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private
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// You have to handle this two messages to call NotifyMoveOrResizeStarted or some page elements will be misaligned.
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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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// You also have to handle these two messages to set GlobalCEFApp.OsmodalLoop
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procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
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procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
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protected
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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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end;
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var
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WebBrowserFrm: TWebBrowserFrm;
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implementation
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{$R *.dfm}
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// This is a demo with the simplest web browser you can build using CEF4Delphi and
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// it doesn't show any sign of progress like other web browsers do.
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// Remember that it may take a few seconds to load if Windows update, your antivirus or
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// any other windows service is using your hard drive.
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// Depending on your internet connection it may take longer than expected.
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// Please check that your firewall or antivirus are not blocking this application
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// or the domain "google.com". If you don't live in the US, you'll be redirected to
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// another domain which will take a little time too.
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// Destruction steps
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// =================
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// 1. The FormCloseQuery event sets CanClose to False and calls TChromiumWindow.CloseBrowser, which triggers the TChromiumWindow.OnClose event.
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// 2. The TChromiumWindow.OnClose event calls TChromiumWindow.DestroyChildWindow which triggers the TChromiumWindow.OnBeforeClose event.
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// 3. TChromiumWindow.OnBeforeClose sets FCanClose to True and closes the form.
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procedure TWebBrowserFrm.ChromiumWindow1AfterCreated(Sender: TObject);
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begin
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ChromiumWindow1.LoadURL('https://www.google.com');
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end;
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procedure TWebBrowserFrm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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begin
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CanClose := FCanClose;
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if not(FClosing) then
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begin
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FClosing := True;
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Visible := False;
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ChromiumWindow1.CloseBrowser(True);
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end;
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end;
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procedure TWebBrowserFrm.FormCreate(Sender: TObject);
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begin
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FCanClose := False;
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FClosing := False;
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end;
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procedure TWebBrowserFrm.FormShow(Sender: TObject);
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begin
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// For simplicity, this demo blocks all popup windows and new tabs
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ChromiumWindow1.ChromiumBrowser.OnBeforePopup := Chromium_OnBeforePopup;
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// You *MUST* call CreateBrowser to create and initialize the browser.
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// This will trigger the AfterCreated event when the browser is fully
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// initialized and ready to receive commands.
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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(ChromiumWindow1.CreateBrowser) then Timer1.Enabled := True;
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end;
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procedure TWebBrowserFrm.Timer1Timer(Sender: TObject);
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begin
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Timer1.Enabled := False;
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if not(ChromiumWindow1.CreateBrowser) and not(ChromiumWindow1.Initialized) then
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Timer1.Enabled := True;
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end;
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procedure TWebBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
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begin
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FCanClose := True;
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Close;
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end;
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procedure TWebBrowserFrm.ChromiumWindow1Close(Sender: TObject);
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begin
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// DestroyChildWindow will destroy the child window created by CEF at the top of the Z order.
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if not(ChromiumWindow1.DestroyChildWindow) then
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begin
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FCanClose := True;
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Close;
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end;
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end;
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procedure TWebBrowserFrm.Chromium_OnBeforePopup(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
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targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition;
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userGesture: Boolean; const popupFeatures: TCefPopupFeatures;
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var windowInfo: TCefWindowInfo; var client: ICefClient;
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var settings: TCefBrowserSettings; 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, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
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end;
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procedure TWebBrowserFrm.WMMove(var aMessage : TWMMove);
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begin
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inherited;
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if (ChromiumWindow1 <> nil) then ChromiumWindow1.NotifyMoveOrResizeStarted;
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end;
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procedure TWebBrowserFrm.WMMoving(var aMessage : TMessage);
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begin
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inherited;
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if (ChromiumWindow1 <> nil) then ChromiumWindow1.NotifyMoveOrResizeStarted;
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end;
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procedure TWebBrowserFrm.WMEnterMenuLoop(var aMessage: TMessage);
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begin
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inherited;
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if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
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end;
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procedure TWebBrowserFrm.WMExitMenuLoop(var aMessage: TMessage);
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begin
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inherited;
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if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
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end;
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end.
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