You've already forked CEF4Delphi
mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2025-06-12 22:07:39 +02:00
Added a Linux version of the SubProcess demo for Lazarus
GlobalCEFApp now uses the custom "ShowX11Message" procedure to show messages when the WidgetSet is not initialized.
This commit is contained in:
Salvador Diaz Fau
268
demos/Lazarus_Linux/SubProcess/uSubProcess.pas
Normal file
268
demos/Lazarus_Linux/SubProcess/uSubProcess.pas
Normal file
@ -0,0 +1,268 @@
|
||||
// ************************************************************************
|
||||
// ***************************** 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 uSubProcess;
|
||||
|
||||
{$mode objfpc}{$H+}
|
||||
|
||||
interface
|
||||
|
||||
uses
|
||||
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, ExtCtrls, StdCtrls, LMessages,
|
||||
uCEFChromium, uCEFWindowParent, uCEFConstants, uCEFTypes, uCEFInterfaces,
|
||||
uCEFChromiumEvents, uCEFLinkedWindowParent;
|
||||
|
||||
type
|
||||
|
||||
{ TForm1 }
|
||||
|
||||
TForm1 = class(TForm)
|
||||
AddressEdt: TEdit;
|
||||
CEFLinkedWindowParent1: TCEFLinkedWindowParent;
|
||||
GoBtn: TButton;
|
||||
Chromium1: TChromium;
|
||||
AddressPnl: TPanel;
|
||||
Timer1: TTimer;
|
||||
|
||||
procedure CEFLinkedWindowParent1Enter(Sender: TObject);
|
||||
procedure CEFLinkedWindowParent1Exit(Sender: TObject);
|
||||
|
||||
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
||||
procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
|
||||
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction: TCefCloseBrowserAction);
|
||||
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: Boolean; var Result: Boolean);
|
||||
procedure Chromium1OpenUrlFromTab(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; out Result: Boolean);
|
||||
|
||||
procedure FormCreate(Sender: TObject);
|
||||
procedure FormActivate(Sender: TObject);
|
||||
procedure FormCloseQuery(Sender: TObject; var CanClose: boolean);
|
||||
|
||||
procedure GoBtnClick(Sender: TObject);
|
||||
procedure Timer1Timer(Sender: TObject);
|
||||
private
|
||||
|
||||
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.
|
||||
|
||||
// CEF needs to handle these messages to call TChromium.NotifyMoveOrResizeStarted
|
||||
procedure WMMove(var Message: TLMMove); message LM_MOVE;
|
||||
procedure WMSize(var Message: TLMSize); message LM_SIZE;
|
||||
procedure WMWindowPosChanged(var Message: TLMWindowPosChanged); message LM_WINDOWPOSCHANGED;
|
||||
|
||||
procedure SendCompMessage(aMsg : cardinal);
|
||||
|
||||
procedure BrowserCreatedMsg(Data: PtrInt);
|
||||
procedure BrowserCloseFormMsg(Data: PtrInt);
|
||||
public
|
||||
|
||||
end;
|
||||
|
||||
var
|
||||
Form1: TForm1;
|
||||
|
||||
procedure CreateGlobalCEFApp;
|
||||
|
||||
implementation
|
||||
|
||||
{$R *.lfm}
|
||||
|
||||
// This is a demo based on the SimpleBrowser2 demo but it uses a different
|
||||
// executable for the Chromium subprocesses.
|
||||
|
||||
// Before running this demo you need to build the "SubProcess_sp.lpr" project.
|
||||
|
||||
// Destruction steps
|
||||
// =================
|
||||
// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
|
||||
// 2. TChromium.OnClose sets aAction to cbaClose to destroy the browser, which triggers the TChromium.OnBeforeClose event.
|
||||
// 3. TChromium.OnBeforeClose sets FCanClose := True and sends CEF_BEFORECLOSE to close the form.
|
||||
|
||||
uses
|
||||
uCEFApplication;
|
||||
|
||||
{ TForm1 }
|
||||
|
||||
|
||||
procedure CreateGlobalCEFApp;
|
||||
begin
|
||||
GlobalCEFApp := TCefApplication.Create;
|
||||
GlobalCEFApp.BrowserSubprocessPath := 'SubProcess_sp'; // This is the name of the executable used by CEF for the Chromium subprocesses
|
||||
end;
|
||||
|
||||
procedure TForm1.FormCreate(Sender: TObject);
|
||||
begin
|
||||
FCanClose := False;
|
||||
FClosing := False;
|
||||
|
||||
Chromium1.DefaultURL := UTF8Decode(AddressEdt.Text);
|
||||
end;
|
||||
|
||||
procedure TForm1.GoBtnClick(Sender: TObject);
|
||||
begin
|
||||
Chromium1.LoadURL(UTF8Decode(AddressEdt.Text));
|
||||
end;
|
||||
|
||||
procedure TForm1.Timer1Timer(Sender: TObject);
|
||||
begin
|
||||
Timer1.Enabled := False;
|
||||
if not(Chromium1.CreateBrowser(CEFLinkedWindowParent1.Handle, CEFLinkedWindowParent1.BoundsRect)) and
|
||||
not(Chromium1.Initialized) then
|
||||
Timer1.Enabled := True;
|
||||
end;
|
||||
|
||||
procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: boolean);
|
||||
begin
|
||||
CanClose := FCanClose;
|
||||
|
||||
if not(FClosing) then
|
||||
begin
|
||||
FClosing := True;
|
||||
Visible := False;
|
||||
Chromium1.CloseBrowser(True);
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure TForm1.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: Boolean; var Result: Boolean);
|
||||
begin
|
||||
// For simplicity, this demo blocks all popup windows and new tabs
|
||||
Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
|
||||
end;
|
||||
|
||||
procedure TForm1.Chromium1OpenUrlFromTab(Sender: TObject;
|
||||
const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring;
|
||||
targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; out
|
||||
Result: Boolean);
|
||||
begin
|
||||
// For simplicity, this demo blocks all popup windows and new tabs
|
||||
Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
|
||||
end;
|
||||
|
||||
procedure TForm1.FormActivate(Sender: TObject);
|
||||
begin
|
||||
// You *MUST* call CreateBrowser to create and initialize the browser.
|
||||
// This will trigger the AfterCreated event when the browser is fully
|
||||
// initialized and ready to receive commands.
|
||||
|
||||
// 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.
|
||||
|
||||
// Linux needs a visible form to create a browser so we need to use the
|
||||
// TForm.OnActivate event instead of the TForm.OnShow event
|
||||
|
||||
if not(Chromium1.Initialized) and
|
||||
not(Chromium1.CreateBrowser(CEFLinkedWindowParent1.Handle, CEFLinkedWindowParent1.BoundsRect)) then
|
||||
Timer1.Enabled := True;
|
||||
end;
|
||||
|
||||
procedure TForm1.Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction: TCefCloseBrowserAction);
|
||||
begin
|
||||
// continue closing the browser
|
||||
aAction := cbaClose;
|
||||
end;
|
||||
|
||||
procedure TForm1.Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
|
||||
begin
|
||||
// We must wait until all browsers trigger the TChromium.OnBeforeClose event
|
||||
// in order to close the application safely or we will have shutdown issues.
|
||||
FCanClose := True;
|
||||
SendCompMessage(CEF_BEFORECLOSE);
|
||||
end;
|
||||
|
||||
procedure TForm1.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
||||
begin
|
||||
// Now the browser is fully initialized we can initialize the UI.
|
||||
SendCompMessage(CEF_AFTERCREATED);
|
||||
end;
|
||||
|
||||
procedure TForm1.CEFLinkedWindowParent1Enter(Sender: TObject);
|
||||
begin
|
||||
If not(csDesigning in ComponentState) then Chromium1.SetFocus(True);
|
||||
end;
|
||||
|
||||
procedure TForm1.CEFLinkedWindowParent1Exit(Sender: TObject);
|
||||
begin
|
||||
if not(csDesigning in ComponentState) then Chromium1.SendCaptureLostEvent;
|
||||
end;
|
||||
|
||||
procedure TForm1.BrowserCreatedMsg(Data: PtrInt);
|
||||
begin
|
||||
Caption := 'SubProcess Browser';
|
||||
AddressPnl.Enabled := True;
|
||||
end;
|
||||
|
||||
procedure TForm1.BrowserCloseFormMsg(Data: PtrInt);
|
||||
begin
|
||||
Close;
|
||||
end;
|
||||
|
||||
procedure TForm1.SendCompMessage(aMsg : cardinal);
|
||||
begin
|
||||
case aMsg of
|
||||
CEF_AFTERCREATED : Application.QueueAsyncCall(@BrowserCreatedMsg, 0);
|
||||
CEF_BEFORECLOSE : Application.QueueAsyncCall(@BrowserCloseFormMsg, 0);
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure TForm1.WMMove(var Message: TLMMove);
|
||||
begin
|
||||
inherited;
|
||||
Chromium1.NotifyMoveOrResizeStarted;
|
||||
end;
|
||||
|
||||
procedure TForm1.WMSize(var Message: TLMSize);
|
||||
begin
|
||||
inherited;
|
||||
Chromium1.NotifyMoveOrResizeStarted;
|
||||
end;
|
||||
|
||||
procedure TForm1.WMWindowPosChanged(var Message: TLMWindowPosChanged);
|
||||
begin
|
||||
inherited;
|
||||
Chromium1.NotifyMoveOrResizeStarted;
|
||||
end;
|
||||
|
||||
|
||||
end.
|
||||
|
||||
Reference in New Issue
Block a user