unit uMainForm; {$I ..\..\..\source\cef.inc} interface uses {$IFDEF DELPHI16_UP} Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls, {$ELSE} Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls, {$ENDIF} uCEFChromium, uCEFWindowParent, uCEFChromiumWindow, uCEFInterfaces, uCustomResourceHandler, uCEFConstants, uCEFTypes, uCEFWinControl, uCEFLinkedWinControlBase; type TMainForm = class(TForm) ChromiumWindow1: TChromiumWindow; AddressBarPnl: TPanel; Edit1: TEdit; Button1: TButton; Timer1: TTimer; procedure FormCreate(Sender: TObject); procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean); procedure FormShow(Sender: TObject); procedure Button1Click(Sender: TObject); procedure Timer1Timer(Sender: TObject); procedure ChromiumWindow1Close(Sender: TObject); procedure ChromiumWindow1BeforeClose(Sender: TObject); private procedure WMMove(var aMessage : TWMMove); message WM_MOVE; procedure WMMoving(var aMessage : TMessage); message WM_MOVING; procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP; procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP; protected // Variables to control when can we destroy the form safely FCanClose : boolean; // Set to True in TChromium.OnBeforeClose FClosing : boolean; // Set to True in the CloseQuery event. FHandler : ICefResourceHandler; procedure Chromium_OnAfterCreated(Sender: TObject); procedure Chromium_OnGetResourceHandler(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const request: ICefRequest; var aResourceHandler : ICefResourceHandler); procedure Chromium_OnBeforePopup(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: Boolean; var Result: Boolean); public { Public declarations } end; var MainForm: TMainForm; procedure CreateGlobalCEFApp; implementation {$R *.dfm} uses uCEFMiscFunctions, uCEFApplication; // Destruction steps // ================= // 1. The FormCloseQuery event sets CanClose to False and calls TChromiumWindow.CloseBrowser, which triggers the TChromiumWindow.OnClose event. // 2. The TChromiumWindow.OnClose event calls TChromiumWindow.DestroyChildWindow which triggers the TChromiumWindow.OnBeforeClose event. // 3. TChromiumWindow.OnBeforeClose sets FCanClose := True and sends WM_CLOSE to the form. procedure CreateGlobalCEFApp; begin GlobalCEFApp := TCefApplication.Create; //GlobalCEFApp.LogFile := 'cef.log'; //GlobalCEFApp.LogSeverity := LOGSEVERITY_VERBOSE; end; procedure TMainForm.Button1Click(Sender: TObject); begin ChromiumWindow1.LoadURL(Edit1.Text); end; procedure TMainForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean); begin CanClose := FCanClose; if not(FClosing) then begin FClosing := True; Visible := False; FHandler := nil; ChromiumWindow1.CloseBrowser(True); end; end; procedure TMainForm.FormCreate(Sender: TObject); var TempStream : TStringStream; begin TempStream := nil; FCanClose := False; FClosing := False; try try TempStream := TStringStream.Create('

test

', TEncoding.UTF8, false); FHandler := TCustomResourceHandler.Create(nil, nil, '', nil, TStream(TempStream), CefGetMimeType('html')); except on e : exception do if CustomExceptionHandler('TMainForm.FormCreate', e) then raise; end; finally if (TempStream <> nil) then FreeAndNil(TempStream); end; end; procedure TMainForm.FormShow(Sender: TObject); begin ChromiumWindow1.OnAfterCreated := Chromium_OnAfterCreated; ChromiumWindow1.ChromiumBrowser.OnGetResourceHandler := Chromium_OnGetResourceHandler; ChromiumWindow1.ChromiumBrowser.OnBeforePopup := Chromium_OnBeforePopup; // GlobalCEFApp.GlobalContextInitialized has to be TRUE before creating any browser // If it's not initialized yet, we use a simple timer to create the browser later. if not(ChromiumWindow1.CreateBrowser) then Timer1.Enabled := True; end; procedure TMainForm.Timer1Timer(Sender: TObject); begin Timer1.Enabled := False; if not(ChromiumWindow1.CreateBrowser) and not(ChromiumWindow1.Initialized) then Timer1.Enabled := True; end; procedure TMainForm.ChromiumWindow1BeforeClose(Sender: TObject); begin FCanClose := True; PostMessage(Handle, WM_CLOSE, 0, 0); end; procedure TMainForm.ChromiumWindow1Close(Sender: TObject); begin // DestroyChildWindow will destroy the child window created by CEF at the top of the Z order. if not(ChromiumWindow1.DestroyChildWindow) then begin FCanClose := True; PostMessage(Handle, WM_CLOSE, 0, 0); end; end; procedure TMainForm.Chromium_OnAfterCreated(Sender: TObject); begin ChromiumWindow1.UpdateSize; AddressBarPnl.Enabled := True; end; procedure TMainForm.Chromium_OnGetResourceHandler( Sender : TObject; const browser : ICefBrowser; const frame : ICefFrame; const request : ICefRequest; var aResourceHandler : ICefResourceHandler); begin aResourceHandler := FHandler; end; procedure TMainForm.Chromium_OnBeforePopup( Sender : TObject; const browser : ICefBrowser; const frame : ICefFrame; const targetUrl : ustring; const targetFrameName : ustring; targetDisposition : TCefWindowOpenDisposition; userGesture : Boolean; const popupFeatures : TCefPopupFeatures; var windowInfo : TCefWindowInfo; var client : ICefClient; var settings : TCefBrowserSettings; var extra_info : ICefDictionaryValue; var noJavascriptAccess : Boolean; var Result : Boolean); begin // For simplicity, this demo blocks all popup windows and new tabs Result := (targetDisposition in [CEF_WOD_NEW_FOREGROUND_TAB, CEF_WOD_NEW_BACKGROUND_TAB, CEF_WOD_NEW_POPUP, CEF_WOD_NEW_WINDOW]); end; procedure TMainForm.WMMove(var aMessage : TWMMove); begin inherited; if (ChromiumWindow1 <> nil) then ChromiumWindow1.NotifyMoveOrResizeStarted; end; procedure TMainForm.WMMoving(var aMessage : TMessage); begin inherited; if (ChromiumWindow1 <> nil) then ChromiumWindow1.NotifyMoveOrResizeStarted; end; procedure TMainForm.WMEnterMenuLoop(var aMessage: TMessage); begin inherited; if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True; end; procedure TMainForm.WMExitMenuLoop(var aMessage: TMessage); begin inherited; if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False; end; end.