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Added TCEFSentinel to more demos

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- Check that all frames are valid before using them
- Added an error page to MiniBrowser.
This commit is contained in:
Salvador Díaz Fau
2019-10-13 18:50:23 +02:00
parent 9391d68ee0
commit 77121dc510
89 changed files with 1097 additions and 522 deletions
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5
demos/Delphi_VCL/JavaScript/JSExtensionWithFunction/uJSExtensionWithFunction.dfm
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@ -87,4 +87,9 @@ object JSExtensionWithFunctionFrm: TJSExtensionWithFunctionFrm
Left = 32
Top = 288
end
object CEFSentinel1: TCEFSentinel
OnClose = CEFSentinel1Close
Left = 32
Top = 352
end
end

16
demos/Delphi_VCL/JavaScript/JSExtensionWithFunction/uJSExtensionWithFunction.pas
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@ -50,7 +50,7 @@ uses
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ComCtrls,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants,
uCEFWinControl;
uCEFWinControl, uCEFSentinel;
type
TJSExtensionWithFunctionFrm = class(TForm)
@ -61,6 +61,7 @@ type
Chromium1: TChromium;
Timer1: TTimer;
StatusBar1: TStatusBar;
CEFSentinel1: TCEFSentinel;
procedure FormShow(Sender: TObject);
procedure GoBtnClick(Sender: TObject);
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
@ -82,6 +83,7 @@ type
var aAction : TCefCloseBrowserAction);
procedure Chromium1BeforeClose(Sender: TObject;
const browser: ICefBrowser);
procedure CEFSentinel1Close(Sender: TObject);
protected
// Variables to control when can we destroy the form safely
FCanClose : boolean; // Set to True in TChromium.OnBeforeClose
@ -121,7 +123,8 @@ uses
// =================
// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 in the main thread, which triggers the TChromium.OnBeforeClose event.
// 3. TChromium.OnBeforeClose sets FCanClose := True and sends WM_CLOSE to the form.
// 3. TChromium.OnBeforeClose calls TCEFSentinel.Start, which will trigger TCEFSentinel.OnClose when the renderer processes are closed.
// 4. TCEFSentinel.OnClose sets FCanClose := True and sends WM_CLOSE to the form.
{$IFDEF DELPHI12_UP}procedure
{$ELSE}class procedure TJSSimpleExtensionFrm.{$ENDIF}GlobalCEFApp_OnWebKitInitializedEvent;
@ -159,6 +162,12 @@ begin
Chromium1.LoadURL(Edit1.Text);
end;
procedure TJSExtensionWithFunctionFrm.CEFSentinel1Close(Sender: TObject);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
end;
procedure TJSExtensionWithFunctionFrm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
@ -167,8 +176,7 @@ end;
procedure TJSExtensionWithFunctionFrm.Chromium1BeforeClose(Sender: TObject;
const browser: ICefBrowser);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
CEFSentinel1.Start;
end;
procedure TJSExtensionWithFunctionFrm.Chromium1BeforePopup(Sender: TObject;

31
demos/Delphi_VCL/JavaScript/JSExtensionWithFunction/uMyV8Handler.pas
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@ -61,19 +61,28 @@ function TMyV8Handler.Execute(const name : ustring;
var retval : ICefv8Value;
var exception : ustring): Boolean;
var
msg: ICefProcessMessage;
TempMessage : ICefProcessMessage;
TempFrame : ICefFrame;
begin
if (name = 'myfunc') then
begin
msg := TCefProcessMessageRef.New(TEST_MESSAGE_NAME);
msg.ArgumentList.SetString(0, 'Message received!');
TCefv8ContextRef.Current.Browser.MainFrame.SendProcessMessage(PID_BROWSER, msg);
Result := False;
retval := TCefv8ValueRef.NewString('My Value!');
Result := True;
end
else
Result := False;
try
if (name = 'myfunc') then
begin
TempMessage := TCefProcessMessageRef.New(TEST_MESSAGE_NAME);
TempMessage.ArgumentList.SetString(0, 'Message received!');
TempFrame := TCefv8ContextRef.Current.Browser.MainFrame;
if (TempFrame <> nil) and TempFrame.IsValid then
TempFrame.SendProcessMessage(PID_BROWSER, TempMessage);
retval := TCefv8ValueRef.NewString('My Value!');
Result := True;
end;
finally
TempMessage := nil;
end;
end;