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Added TabbedBrowser2 demo
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Salvador Díaz Fau
281
demos/Lazarus/TabbedBrowser2/uBrowserFrame.pas
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281
demos/Lazarus/TabbedBrowser2/uBrowserFrame.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 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 © 2020 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 uBrowserFrame;
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{$MODE Delphi}
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{$I cef.inc}
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interface
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uses
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LCLIntf, LCLType, LMessages, Messages, SysUtils, Variants,
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Classes, Graphics, Controls, Forms, Dialogs,
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ExtCtrls, ComCtrls, StdCtrls,
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uCEFWinControl, uCEFWindowParent, uCEFChromiumCore, uCEFChromium,
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uCEFInterfaces, uCEFTypes, uCEFConstants;
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type
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TBrowserTitleEvent = procedure(Sender: TObject; const aTitle : string) of object;
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TBrowserFrame = class(TFrame)
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NavControlPnl: TPanel;
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NavButtonPnl: TPanel;
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BackBtn: TButton;
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ForwardBtn: TButton;
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ReloadBtn: TButton;
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StopBtn: TButton;
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URLEditPnl: TPanel;
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URLCbx: TComboBox;
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ConfigPnl: TPanel;
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GoBtn: TButton;
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StatusBar1: TStatusBar;
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Chromium1: TChromium;
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CEFWindowParent1: TCEFWindowParent;
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procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
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procedure Chromium1AddressChange(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
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procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
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procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction: TCefCloseBrowserAction);
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procedure Chromium1LoadError(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; errorCode: Integer; const errorText, failedUrl: ustring);
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procedure Chromium1LoadingStateChange(Sender: TObject; const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
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procedure Chromium1StatusMessage(Sender: TObject; const browser: ICefBrowser; const value: ustring);
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procedure Chromium1TitleChange(Sender: TObject; const browser: ICefBrowser; const title: ustring);
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procedure Chromium1BeforePopup(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl, targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo; var client: ICefClient; var settings: TCefBrowserSettings; var extra_info: ICefDictionaryValue; var noJavascriptAccess, Result: Boolean);
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procedure Chromium1OpenUrlFromTab(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; out Result: Boolean);
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procedure BackBtnClick(Sender: TObject);
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procedure ForwardBtnClick(Sender: TObject);
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procedure ReloadBtnClick(Sender: TObject);
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procedure StopBtnClick(Sender: TObject);
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procedure GoBtnClick(Sender: TObject);
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protected
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FClosing : boolean; // Indicates that this frame is destroying the browser
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FHomepage : string;
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FOnBrowserDestroyed : TNotifyEvent;
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FOnBrowserTitleChange : TBrowserTitleEvent;
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procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
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procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
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public
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constructor Create(AOwner : TComponent); override;
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procedure NotifyMoveOrResizeStarted;
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procedure CreateBrowser;
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procedure CloseBrowser;
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property Closing : boolean read FClosing;
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property Homepage : string read FHomepage write FHomepage;
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property OnBrowserDestroyed : TNotifyEvent read FOnBrowserDestroyed write FOnBrowserDestroyed;
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property OnBrowserTitleChange : TBrowserTitleEvent read FOnBrowserTitleChange write FOnBrowserTitleChange;
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end;
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implementation
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{$R *.lfm}
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constructor TBrowserFrame.Create(AOwner : TComponent);
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begin
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inherited Create(AOwner);
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FClosing := False;
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FHomepage := '';
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FOnBrowserDestroyed := nil;
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FOnBrowserTitleChange := nil;
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end;
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procedure TBrowserFrame.NotifyMoveOrResizeStarted;
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begin
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Chromium1.NotifyMoveOrResizeStarted;
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end;
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procedure TBrowserFrame.ReloadBtnClick(Sender: TObject);
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begin
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Chromium1.Reload;
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end;
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procedure TBrowserFrame.StopBtnClick(Sender: TObject);
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begin
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Chromium1.StopLoad;
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end;
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procedure TBrowserFrame.CreateBrowser;
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begin
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Chromium1.DefaultURL := FHomepage;
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Chromium1.CreateBrowser(CEFWindowParent1);
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end;
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procedure TBrowserFrame.CloseBrowser;
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begin
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if not(FClosing) then
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begin
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FClosing := True;
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NavControlPnl.Enabled := False;
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Chromium1.CloseBrowser(True);
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end;
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end;
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procedure TBrowserFrame.ForwardBtnClick(Sender: TObject);
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begin
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Chromium1.GoForward;
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end;
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procedure TBrowserFrame.GoBtnClick(Sender: TObject);
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begin
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Chromium1.LoadURL(URLCbx.Text);
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end;
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procedure TBrowserFrame.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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end;
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procedure TBrowserFrame.BackBtnClick(Sender: TObject);
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begin
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Chromium1.GoBack;
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end;
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procedure TBrowserFrame.Chromium1AddressChange(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
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begin
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if (URLCbx.Items.IndexOf(url) < 0) then URLCbx.Items.Add(url);
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URLCbx.Text := url;
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end;
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procedure TBrowserFrame.Chromium1BeforeClose(Sender: TObject;
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const browser: ICefBrowser);
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begin
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if assigned(FOnBrowserDestroyed) then FOnBrowserDestroyed(self);
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end;
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procedure TBrowserFrame.Chromium1BeforePopup(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 extra_info: ICefDictionaryValue;
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var noJavascriptAccess, 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 TBrowserFrame.Chromium1Close(Sender: TObject;
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const browser: ICefBrowser; var aAction: TCefCloseBrowserAction);
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begin
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PostMessage(Handle, CEF_DESTROY, 0, 0);
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aAction := cbaDelay;
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end;
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procedure TBrowserFrame.Chromium1LoadError(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; errorCode: Integer;
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const errorText, failedUrl: ustring);
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var
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TempString : string;
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begin
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if (errorCode = ERR_ABORTED) then exit;
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TempString := '<html><body bgcolor="white">' +
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'<h2>Failed to load URL ' + failedUrl +
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' with error ' + errorText +
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' (' + inttostr(errorCode) + ').</h2></body></html>';
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Chromium1.LoadString(TempString, frame);
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end;
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procedure TBrowserFrame.Chromium1LoadingStateChange(Sender: TObject;
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const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
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begin
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BackBtn.Enabled := canGoBack;
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ForwardBtn.Enabled := canGoForward;
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if isLoading then
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begin
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ReloadBtn.Enabled := False;
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StopBtn.Enabled := True;
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end
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else
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begin
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ReloadBtn.Enabled := True;
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StopBtn.Enabled := False;
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end;
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end;
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procedure TBrowserFrame.Chromium1OpenUrlFromTab(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring;
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targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean;
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out 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 TBrowserFrame.Chromium1StatusMessage(Sender: TObject;
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const browser: ICefBrowser; const value: ustring);
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begin
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StatusBar1.Panels[0].Text := value;
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end;
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procedure TBrowserFrame.Chromium1TitleChange(Sender: TObject;
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const browser: ICefBrowser; const title: ustring);
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begin
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if not(assigned(FOnBrowserTitleChange)) then exit;
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if (length(title) > 0) then
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FOnBrowserTitleChange(self, title)
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else
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FOnBrowserTitleChange(self, Chromium1.DocumentURL);
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end;
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procedure TBrowserFrame.BrowserCreatedMsg(var aMessage : TMessage);
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begin
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CEFWindowParent1.UpdateSize;
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NavControlPnl.Enabled := True;
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end;
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procedure TBrowserFrame.BrowserDestroyMsg(var aMessage : TMessage);
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begin
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CEFWindowParent1.Free;
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end;
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end.
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