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mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-04 09:26:52 +02:00
CEF4Delphi/demos/PopupBrowser/uMainForm.pas
Salvador Díaz Fau a8c44bd87b Update to CEF 3.3578.1863.gbf8cff2
- Removed obsolete "Result" parameter in all OSR demos.
- Added more code comments to ResponseFilterBrowser.
- Now ResponseFilterBrowser modifies the HTTP request to receive uncompressed resources.
- Updated compiler properties in Delphinus.Install.json
2019-01-13 12:17:52 +01:00

350 lines
12 KiB
ObjectPascal

// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 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 © 2019 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 uMainForm;
{$I cef.inc}
interface
uses
{$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, System.SyncObjs,
{$ELSE}
Windows, Messages, SysUtils, Variants, Classes, Graphics,
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, SyncObjs,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFConstants, uCEFTypes, uChildForm,
Vcl.AppEvnts, uCEFWinControl;
const
CEF_CREATENEXTCHILD = WM_APP + $A50;
CEF_CHILDDESTROYED = WM_APP + $A51;
type
TMainForm = class(TForm)
AddressPnl: TPanel;
AddressEdt: TEdit;
GoBtn: TButton;
Timer1: TTimer;
Chromium1: TChromium;
CEFWindowParent1: TCEFWindowParent;
AppEvents: TApplicationEvents;
procedure GoBtnClick(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure AppEventsMessage(var Msg: tagMSG; var Handled: Boolean);
procedure FormShow(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
procedure Chromium1BeforePopup(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl, targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo; var client: ICefClient; var settings: TCefBrowserSettings; var noJavascriptAccess: Boolean; var Result: Boolean);
protected
FChildForm : TChildForm;
FCriticalSection : TCriticalSection;
FClosing : boolean;
function GetPopupChildCount : integer;
procedure ClosePopupChildren;
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
procedure CreateNextChildMsg(var aMessage : TMessage); message CEF_CREATENEXTCHILD;
procedure ChildDestroyedMsg(var aMessage : TMessage); message CEF_CHILDDESTROYED;
public
function CreateClientHandler(var windowInfo : TCefWindowInfo; var client : ICefClient; const targetFrameName : string; const popupFeatures : TCefPopupFeatures) : boolean;
property PopupChildCount : integer read GetPopupChildCount;
end;
var
MainForm: TMainForm;
implementation
{$R *.dfm}
uses
uCEFApplication, uCEFMiscFunctions;
// This is demo shows how to create popup windows in CEF.
// You need to understand The SimpleBrowser2 and SimpleOSRBrowser demos completely before trying to understand this demo.
// When TChromium needs to show a new popup window it executes TChromium.OnBeforePopup.
// VCL components *MUST* be created and destroyed in the main thread but CEF executes the
// TChromium.OnBeforePopup in a different thread.
// For this reason this demo creates a hidden popup form (TChildForm) in case CEF needs to show a popup window.
// TChromium.OnBeforePopup calls TChildForm.CreateClientHandler to initialize some parameters and create the new ICefClient.
// After that, it sends a CEF_CREATENEXTCHILD message to show the popup form and create a new one.
// All the child forms must be correctly destroyed before closing the main form. Read the code comments in uChildForm.pas
// to know how the popup windows are destroyed.
// The main form sends a WM_CLOSE to all active popup forms and waits until all of them have sent a CEF_CHILDDESTROYED message.
procedure TMainForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
FClosing := True;
Visible := False;
if (PopupChildCount > 0) then
begin
ClosePopupChildren;
CanClose := False;
end
else
CanClose := True;
end;
procedure TMainForm.FormCreate(Sender: TObject);
begin
FClosing := False;
FCriticalSection := TCriticalSection.Create;
Chromium1.Options.BackgroundColor := CefColorSetARGB($FF, $FF, $FF, $FF);
end;
procedure TMainForm.FormDestroy(Sender: TObject);
begin
FreeAndNil(FCriticalSection);
end;
procedure TMainForm.FormShow(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.
if not(Chromium1.CreateBrowser(CEFWindowParent1)) then Timer1.Enabled := True;
end;
procedure TMainForm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
// Now the browser is fully initialized we can send a message to the main form to load the initial web page.
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
end;
procedure TMainForm.Chromium1BeforePopup(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 noJavascriptAccess : Boolean;
var Result : Boolean);
begin
case targetDisposition of
WOD_NEW_FOREGROUND_TAB,
WOD_NEW_BACKGROUND_TAB,
WOD_NEW_WINDOW : Result := True; // For simplicity, this demo blocks new tabs and new windows.
WOD_NEW_POPUP : Result := not(CreateClientHandler(windowInfo, client, targetFrameName, popupFeatures));
else Result := False;
end;
end;
function TMainForm.CreateClientHandler(var windowInfo : TCefWindowInfo;
var client : ICefClient;
const targetFrameName : string;
const popupFeatures : TCefPopupFeatures) : boolean;
begin
try
FCriticalSection.Acquire;
Result := (FChildForm <> nil) and
FChildForm.CreateClientHandler(windowInfo, client, targetFrameName, popupFeatures) and
PostMessage(Handle, CEF_CREATENEXTCHILD, 0, 0);
finally
FCriticalSection.Release;
end;
end;
function TMainForm.GetPopupChildCount : integer;
var
i : integer;
TempForm : TCustomForm;
begin
Result := 0;
i := pred(screen.CustomFormCount);
while (i >= 0) do
begin
TempForm := screen.CustomForms[i];
// Only count the fully initialized child forms and not the one waiting to be used.
if (TempForm is TChildForm) and
TChildForm(TempForm).ClientInitialized then
inc(Result);
dec(i);
end;
end;
procedure TMainForm.ClosePopupChildren;
var
i : integer;
TempForm : TCustomForm;
begin
i := pred(screen.CustomFormCount);
while (i >= 0) do
begin
TempForm := screen.CustomForms[i];
// Only send WM_CLOSE to fully initialized child forms.
if (TempForm is TChildForm) and
TChildForm(TempForm).ClientInitialized and
not(TChildForm(TempForm).Closing) then
PostMessage(TChildForm(TempForm).Handle, WM_CLOSE, 0, 0);
dec(i);
end;
end;
procedure TMainForm.AppEventsMessage(var Msg: tagMSG; var Handled: Boolean);
begin
case Msg.message of
WM_SYSCHAR : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleSysCharMsg(Msg, Handled);
WM_SYSKEYDOWN : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleSysKeyDownMsg(Msg, Handled);
WM_SYSKEYUP : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleSysKeyUpMsg(Msg, Handled);
WM_KEYDOWN : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleKeyDownMsg(Msg, Handled);
WM_KEYUP : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleKeyUpMsg(Msg, Handled);
WM_CHAR : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleCharMsg(Msg, Handled);
WM_MOUSEWHEEL : if (screen.FocusedForm is TChildForm) then TChildForm(screen.FocusedForm).HandleMouseWheelMsg(Msg, Handled);
else Handled := False;
end;
end;
procedure TMainForm.BrowserCreatedMsg(var aMessage : TMessage);
begin
FChildForm := TChildForm.Create(self);
Caption := 'Popup Browser';
AddressPnl.Enabled := True;
GoBtn.Click;
end;
procedure TMainForm.CreateNextChildMsg(var aMessage : TMessage);
begin
try
FCriticalSection.Acquire;
if (FChildForm <> nil) then
begin
//FChildForm.ApplyPopupFeatures;
//FChildForm.Show;
PostMessage(FChildForm.Handle, CEF_SHOWCHILD, 0, 0);
end;
FChildForm := TChildForm.Create(self);
finally
FCriticalSection.Release;
end;
end;
procedure TMainForm.ChildDestroyedMsg(var aMessage : TMessage);
begin
if FClosing and (PopupChildCount = 0) then Close;
end;
procedure TMainForm.GoBtnClick(Sender: TObject);
begin
// This will load the URL in the edit box
Chromium1.LoadURL(AddressEdt.Text);
end;
procedure TMainForm.Timer1Timer(Sender: TObject);
begin
Timer1.Enabled := False;
if not(Chromium1.CreateBrowser(CEFWindowParent1)) and not(Chromium1.Initialized) then
Timer1.Enabled := True;
end;
procedure TMainForm.WMMove(var aMessage : TWMMove);
begin
inherited;
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
end;
procedure TMainForm.WMMoving(var aMessage : TMessage);
begin
inherited;
if (Chromium1 <> nil) then Chromium1.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.