Fixed issue #202

- Updated the OnBeforeClose event in all demos using TChromiumWindow to send a WM_CLOSE message instead of calling "close".
- Fixed all MDI demos. Now the demo will not close automatically when the last browser is closed manually.

demos/Delphi_VCL/CustomResourceBrowser/uMainForm.pas

@@ -182,7 +182,7 @@ end;
 procedure TMainForm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TMainForm.ChromiumWindow1Close(Sender: TObject);

demos/Delphi_VCL/DLLBrowser/uWebBrowser.pas

@@ -160,7 +160,7 @@ end;
 procedure TWebBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TWebBrowserFrm.ChromiumWindow1Close(Sender: TObject);

demos/Delphi_VCL/JavaScript/JSDialog/uJSDialogBrowser.pas

@@ -240,7 +240,7 @@ end;
 procedure TJSDialogBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TJSDialogBrowserFrm.ChromiumWindow1Close(Sender: TObject);

demos/Delphi_VCL/MDIBrowser/uMainForm.pas

@@ -184,7 +184,7 @@ end;
 procedure TMainForm.ChildDestroyedMsg(var aMessage : TMessage);
 begin
   // If there are no more child forms we can destroy the main form
-  if (MDIChildCount = 0) then
+  if FClosing and (MDIChildCount = 0) then
     begin
       ButtonPnl.Enabled := False;
       FCanClose := True;

demos/Delphi_VCL/MDIExternalPumpBrowser/uMainForm.pas

@@ -195,7 +195,7 @@ end;
 procedure TMainForm.ChildDestroyedMsg(var aMessage : TMessage);
 begin
   // If there are no more child forms we can destroy the main form
-  if (MDIChildCount = 0) then
+  if FClosing and (MDIChildCount = 0) then
     begin
       ButtonPnl.Enabled := False;
       FCanClose := True;

demos/Delphi_VCL/SimpleBrowser/uSimpleBrowser.pas

@@ -150,7 +150,7 @@ end;
 procedure TForm1.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TForm1.ChromiumWindow1Close(Sender: TObject);

demos/Delphi_VCL/SimpleExternalPumpBrowser/uSimpleExternalPumpBrowser.pas

@@ -175,7 +175,7 @@ end;
 procedure TSimpleExternalPumpBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TSimpleExternalPumpBrowserFrm.ChromiumWindow1Close(Sender: TObject);

demos/Delphi_VCL/SubProcess/uSimpleBrowser.pas

@@ -157,7 +157,7 @@ end;
 procedure TForm1.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TForm1.Chromium_OnBeforePopup(Sender: TObject;

demos/Lazarus/CustomResourceBrowser/CRBrowser.lps

@@ -8,9 +8,8 @@
       <Unit0>
         <Filename Value="CRBrowser.lpr"/>
         <IsPartOfProject Value="True"/>
-        <IsVisibleTab Value="True"/>
         <TopLine Value="40"/>
-        <CursorPos X="10" Y="71"/>
+        <CursorPos X="61" Y="62"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <DefaultSyntaxHighlighter Value="Delphi"/>
@@ -21,9 +20,10 @@
         <ComponentName Value="MainForm"/>
         <HasResources Value="True"/>
         <ResourceBaseClass Value="Form"/>
+        <IsVisibleTab Value="True"/>
         <EditorIndex Value="1"/>
-        <TopLine Value="89"/>
+        <TopLine Value="166"/>
-        <CursorPos Y="106"/>
+        <CursorPos Y="169"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>
@@ -71,7 +71,7 @@
         <Loaded Value="True"/>
       </Unit6>
     </Units>
-    <JumpHistory Count="13" HistoryIndex="12">
+    <JumpHistory Count="14" HistoryIndex="13">
       <Position1>
         <Filename Value="uMainForm.pas"/>
       </Position1>
@@ -123,6 +123,10 @@
         <Filename Value="uMainForm.pas"/>
         <Caret Line="117" Column="69" TopLine="109"/>
       </Position13>
+      <Position14>
+        <Filename Value="uMainForm.pas"/>
+        <Caret Line="73" Column="30" TopLine="59"/>
+      </Position14>
     </JumpHistory>
     <RunParams>
       <FormatVersion Value="2"/>

demos/Lazarus/CustomResourceBrowser/uMainForm.lfm

@@ -1,7 +1,7 @@
 object MainForm: TMainForm
-  Left = 150
+  Left = 386
   Height = 658
-  Top = 86
+  Top = 91
   Width = 781
   Caption = 'Custom Resource Browser'
   ClientHeight = 658

demos/Lazarus/CustomResourceBrowser/uMainForm.pas

@@ -166,7 +166,7 @@ end;
 procedure TMainForm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TMainForm.ChromiumWindow1Close(Sender: TObject);

demos/Lazarus/JavaScript/JSDialog/JSDialogBrowser.lps

@@ -22,15 +22,15 @@
         <ResourceBaseClass Value="Form"/>
         <IsVisibleTab Value="True"/>
         <EditorIndex Value="1"/>
-        <TopLine Value="107"/>
+        <TopLine Value="247"/>
-        <CursorPos X="40" Y="105"/>
+        <CursorPos X="41" Y="251"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>
         <DefaultSyntaxHighlighter Value="Delphi"/>
       </Unit1>
     </Units>
-    <JumpHistory Count="4" HistoryIndex="3">
+    <JumpHistory Count="5" HistoryIndex="4">
       <Position1>
         <Filename Value="JSDialogBrowser.lpr"/>
       </Position1>
@@ -46,6 +46,10 @@
         <Filename Value="uJSDialogBrowser.pas"/>
         <Caret Line="88" Column="386" TopLine="70"/>
       </Position4>
+      <Position5>
+        <Filename Value="uJSDialogBrowser.pas"/>
+        <Caret Line="72" Column="32" TopLine="64"/>
+      </Position5>
     </JumpHistory>
     <RunParams>
       <FormatVersion Value="2"/>

demos/Lazarus/JavaScript/JSDialog/uJSDialogBrowser.pas

@@ -248,7 +248,7 @@ end;
 procedure TJSDialogBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TJSDialogBrowserFrm.ChromiumWindow1Close(Sender: TObject);

demos/Lazarus/SimpleBrowser/SimpleBrowser.lps

@@ -22,8 +22,8 @@
         <HasResources Value="True"/>
         <ResourceBaseClass Value="Form"/>
         <IsVisibleTab Value="True"/>
-        <TopLine Value="135"/>
+        <TopLine Value="149"/>
-        <CursorPos X="64" Y="129"/>
+        <CursorPos X="41" Y="170"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>

demos/Lazarus/SimpleBrowser/uSimpleBrowser.pas

@@ -167,7 +167,7 @@ end;
 procedure TForm1.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TForm1.ChromiumWindow1Close(Sender: TObject);

demos/Lazarus/SimpleExternalPumpBrowser/SimpleExternalPumpBrowser.lps

@@ -22,8 +22,8 @@
         <ResourceBaseClass Value="Form"/>
         <IsVisibleTab Value="True"/>
         <EditorIndex Value="1"/>
-        <TopLine Value="111"/>
+        <TopLine Value="150"/>
-        <CursorPos X="41" Y="122"/>
+        <CursorPos X="41" Y="179"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>

demos/Lazarus/SimpleExternalPumpBrowser/uSimpleExternalPumpBrowser.pas

@@ -176,7 +176,7 @@ end;
 procedure TSimpleExternalPumpBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TSimpleExternalPumpBrowserFrm.ChromiumWindow1Close(Sender: TObject);

demos/Lazarus/SubProcess/SimpleBrowser.lps

@@ -20,9 +20,10 @@
         <ComponentName Value="Form1"/>
         <HasResources Value="True"/>
         <ResourceBaseClass Value="Form"/>
+        <IsVisibleTab Value="True"/>
         <EditorIndex Value="2"/>
-        <TopLine Value="75"/>
+        <TopLine Value="147"/>
-        <CursorPos X="39" Y="169"/>
+        <CursorPos X="41" Y="160"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>
@@ -31,9 +32,8 @@
       <Unit2>
         <Filename Value="uCEFLoader.pas"/>
         <IsPartOfProject Value="True"/>
-        <IsVisibleTab Value="True"/>
         <EditorIndex Value="1"/>
-        <TopLine Value="51"/>
+        <TopLine Value="36"/>
         <CursorPos Y="65"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>

demos/Lazarus/SubProcess/uSimpleBrowser.pas

@@ -157,7 +157,7 @@ end;
 procedure TForm1.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TForm1.Chromium_OnBeforePopup(Sender: TObject;

source/uCEFChromiumWindow.pas

@@ -78,7 +78,6 @@ type
       procedure   WndProc(var aMessage: TMessage); override;
 
       procedure   OnCloseMsg(var aMessage : TMessage); message CEF_DOONCLOSE;
-      procedure   OnBeforeCloseMsg(var aMessage : TMessage); message CEF_DOONBEFORECLOSE;
       procedure   OnAfterCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
       {$ENDIF}
       procedure   WebBrowser_OnClose(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
@@ -203,9 +202,7 @@ end;
 
 procedure TChromiumWindow.WebBrowser_OnBeforeClose(Sender: TObject; const browser: ICefBrowser);
 begin
-  {$IFDEF MSWINDOWS}
+  if assigned(FOnBeforeClose) then FOnBeforeClose(self);
-  if assigned(FOnBeforeClose) then PostMessage(Handle, CEF_DOONBEFORECLOSE, 0, 0);
-  {$ENDIF}
 end;
 
 procedure TChromiumWindow.WebBrowser_OnAfterCreated(Sender: TObject; const browser: ICefBrowser);
@@ -221,11 +218,6 @@ begin
   if assigned(FOnClose) then FOnClose(self);
 end;
 
-procedure TChromiumWindow.OnBeforeCloseMsg(var aMessage : TMessage);
-begin
-  if assigned(FOnBeforeClose) then FOnBeforeClose(self);
-end;
-
 procedure TChromiumWindow.OnAfterCreatedMsg(var aMessage : TMessage);
 begin
   UpdateSize;

update_CEF4Delphi.json

@@ -1,8 +1,8 @@
 {
   "UpdateLazPackages" : [
     {
-      "ForceNotify" : false,
+      "ForceNotify" : true,
-      "InternalVersion" : 14,
+      "InternalVersion" : 15,
       "Name" : "cef4delphi_lazarus.lpk",
       "Version" : "75.0.13.0"
     }