Minor fixes to GUIContext

X2UtService.GUIContext.Form.dfm

@@ -13,6 +13,7 @@ object X2ServiceContextGUIForm: TX2ServiceContextGUIForm
   Font.Name = 'Tahoma'
   Font.Style = []
   OldCreateOrder = False
+  Position = poScreenCenter
   OnCloseQuery = FormCloseQuery
   DesignSize = (
     285
@@ -27,7 +28,7 @@ object X2ServiceContextGUIForm: TX2ServiceContextGUIForm
     Anchors = [akLeft, akBottom]
     Caption = '&Close'
     TabOrder = 0
-    ExplicitTop = 180
+    OnClick = btnCloseClick
   end
   object gbStatus: TGroupBox
     AlignWithMargins = True
@@ -42,7 +43,6 @@ object X2ServiceContextGUIForm: TX2ServiceContextGUIForm
     Align = alTop
     Caption = ' Status '
     TabOrder = 1
-    ExplicitWidth = 261
     object lblStatus: TLabel
       Left = 34
       Top = 26
@@ -50,11 +50,13 @@ object X2ServiceContextGUIForm: TX2ServiceContextGUIForm
       Height = 13
       Caption = 'Starting...'
     end
-    object Shape1: TShape
+    object shpStatus: TShape
       Left = 12
       Top = 24
       Width = 16
       Height = 16
+      Brush.Color = 33023
+      Shape = stCircle
     end
   end
   object gbCustomControl: TGroupBox
@@ -89,7 +91,6 @@ object X2ServiceContextGUIForm: TX2ServiceContextGUIForm
       TabOrder = 0
       Text = '128'
       OnChange = edtControlCodeChange
-      ExplicitWidth = 173
     end
     object btnSend: TButton
       Left = 180
@@ -99,7 +100,7 @@ object X2ServiceContextGUIForm: TX2ServiceContextGUIForm
       Anchors = [akTop, akRight]
       Caption = '&Send'
       TabOrder = 1
-      ExplicitLeft = 251
+      OnClick = btnSendClick
     end
   end
 end

X2UtService.GUIContext.Form.pas

@@ -20,14 +20,16 @@ type
     btnClose: TButton;
     gbStatus: TGroupBox;
     lblStatus: TLabel;
-    Shape1: TShape;
+    shpStatus: TShape;
     gbCustomControl: TGroupBox;
     lblControlCode: TLabel;
     edtControlCode: TEdit;
     btnSend: TButton;
 
-    procedure edtControlCodeChange(Sender: TObject);
     procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
+    procedure edtControlCodeChange(Sender: TObject);
+    procedure btnSendClick(Sender: TObject);
+    procedure btnCloseClick(Sender: TObject);
   private
     FContext: IX2ServiceContext;
     FService: IX2Service;
@@ -35,6 +37,8 @@ type
     procedure DoShow; override;
 
     procedure CMAfterShow(var Msg: TMessage); message CM_AFTERSHOW;
+
+    function GetControlCode: Byte;
   public
     property Context: IX2ServiceContext read FContext write FContext;
     property Service: IX2Service read FService write FService;
@@ -45,12 +49,20 @@ implementation
 uses
   System.Math,
   System.SysUtils,
+  Vcl.Graphics,
   Winapi.Windows;
 
 
 {$R *.dfm}
 
 
+const
+  StatusColorStarting = $00B0FFB0;
+  StatusColorStarted = clGreen;
+  StatusColorStopping = $008080FF;
+  StatusColorStopped = clRed;
+
+
 // #ToDo1 -oMvR: 21-10-2016: separate service handling out to thread to prevent blocking of the UI
 
 
@@ -65,26 +77,45 @@ end;
 
 procedure TX2ServiceContextGUIForm.CMAfterShow(var Msg: TMessage);
 begin
+  shpStatus.Brush.Color := StatusColorStarting;
   lblStatus.Caption := 'Starting...';
-  lblStatus.Update;
+  Application.ProcessMessages;
 
   if Service.Start(Context) then
-    lblStatus.Caption := 'Started'
+  begin
-  else
+    shpStatus.Brush.Color := StatusColorStarted;
+    lblStatus.Caption := 'Started';
+  end else
+  begin
+    shpStatus.Brush.Color := StatusColorStopped;
     lblStatus.Caption := 'Failed to start';
   end;
+end;
 
 
 procedure TX2ServiceContextGUIForm.edtControlCodeChange(Sender: TObject);
 begin
-  edtControlCode.Text := IntToStr(Min(Max(StrToIntDef(edtControlCode.Text, 0), 128), 255));
+  edtControlCode.Text := IntToStr(GetControlCode);
+end;
+
+
+procedure TX2ServiceContextGUIForm.btnSendClick(Sender: TObject);
+begin
+  Service.DoCustomControl(GetControlCode);
+end;
+
+
+procedure TX2ServiceContextGUIForm.btnCloseClick(Sender: TObject);
+begin
+  Close;
 end;
 
 
 procedure TX2ServiceContextGUIForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
 begin
+  shpStatus.Brush.Color := StatusColorStopping;
   lblStatus.Caption := 'Stopping...';
-  lblStatus.Update;
+  Application.ProcessMessages;
 
   CanClose := Service.Stop;
 
@@ -92,4 +123,10 @@ begin
     lblStatus.Caption := 'Failed to stop';
 end;
 
+
+function TX2ServiceContextGUIForm.GetControlCode: Byte;
+begin
+  Result := Byte(Min(Max(StrToIntDef(edtControlCode.Text, 0), 128), 255));
+end;
+
 end.

X2UtService.GUIContext.pas

@@ -26,6 +26,8 @@ uses
 constructor TX2ServiceContextGUI.Create(AService: IX2Service);
 begin
   inherited Create;
+
+  StartService(AService);
 end;
 
 

X2UtService.Intf.pas

@@ -65,12 +65,14 @@ implementation
 function TX2CustomService.Start(AContext: IX2ServiceContext): Boolean;
 begin
   FContext := AContext;
+  Result := True;
 end;
 
 
 function TX2CustomService.Stop: Boolean;
 begin
   FContext := nil;
+  Result := True;
 end;