pascal/CEF4Delphi
1
0
Fork 0
mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2025-06-12 22:07:39 +02:00
Code Issues Actions Releases Activity

Added TCEFSentinel to more demos

Browse Source 
- 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
Download Patch File Download Diff File Expand all files Collapse all files

24
demos/Delphi_VCL/JavaScript/JSEval/uJSEval.pas
View File

@ -51,7 +51,7 @@ uses
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, Types, ComCtrls, ClipBrd, EncdDecd,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants,
uCEFWinControl;
uCEFWinControl, uCEFSentinel;
const
MINIBROWSER_SHOWTEXTVIEWER = WM_APP + $101;
@ -74,6 +74,7 @@ type
GoBtn: TButton;
AddressEdt: TEdit;
Timer1: TTimer;
CEFSentinel1: TCEFSentinel;
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
procedure GoBtnClick(Sender: TObject);
procedure FormShow(Sender: TObject);
@ -102,6 +103,7 @@ type
var aAction : TCefCloseBrowserAction);
procedure Chromium1BeforeClose(Sender: TObject;
const browser: ICefBrowser);
procedure CEFSentinel1Close(Sender: TObject);
private
{ Private declarations }
@ -178,8 +180,14 @@ 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.
procedure TJSEvalFrm.CEFSentinel1Close(Sender: TObject);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
end;
procedure TJSEvalFrm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
@ -189,8 +197,7 @@ end;
procedure TJSEvalFrm.Chromium1BeforeClose(Sender: TObject;
const browser: ICefBrowser);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
CEFSentinel1.Start;
end;
procedure TJSEvalFrm.Chromium1BeforeContextMenu(Sender : TObject;
@ -435,7 +442,8 @@ begin
end;
end;
pFrame.SendProcessMessage(PID_BROWSER, pAnswer);
if (pFrame <> nil) and pFrame.IsValid then
pFrame.SendProcessMessage(PID_BROWSER, pAnswer);
end;
procedure ParseBinaryValue(const pBrowser : ICefBrowser; const pFrame : ICefFrame; const aBinaryValue : ICefBinaryValue);
@ -464,7 +472,7 @@ begin
TempString := 'Image size : ' + inttostr(TempSize) + #13 + #10 +
'Encoded image : ' + EncodeBase64(TempPointer, TempSize);
if pAnswer.ArgumentList.SetString(0, TempString) then
if (pFrame <> nil) and pFrame.IsValid and pAnswer.ArgumentList.SetString(0, TempString) then
pFrame.SendProcessMessage(PID_BROWSER, pAnswer);
end;
end;
@ -497,9 +505,9 @@ begin
begin
TempScript := pMessage.ArgumentList.GetString(0);
if (length(TempScript) > 0) then
if (length(TempScript) > 0) and (pFrame <> nil) and pFrame.IsValid then
begin
pV8Context := pBrowser.MainFrame.GetV8Context;
pV8Context := pFrame.GetV8Context;
if pV8Context.Enter then
begin