custom widgets: add Tab widgets

Change-Id: If9acc47b9a7751858d3394741e3984b3c2a49936

vcl/headless/CustomWidgetDraw.cxx

@@ -172,13 +172,25 @@ bool CustomWidgetDraw::drawNativeControl(ControlType eType, ControlPart ePart,
         }
         break;
         case ControlType::TabItem:
-            break;
+        {
+            bOK = s_pWidgetImplementation->drawTabItem(aParameters, nWidth, nHeight);
+        }
+        break;
         case ControlType::TabPane:
-            break;
+        {
+            bOK = s_pWidgetImplementation->drawTabPane(aParameters, nWidth, nHeight);
+        }
+        break;
         case ControlType::TabHeader:
-            break;
+        {
+            bOK = s_pWidgetImplementation->drawTabHeader(aParameters, nWidth, nHeight);
+        }
+        break;
         case ControlType::TabBody:
-            break;
+        {
+            bOK = s_pWidgetImplementation->drawTabBody(aParameters, nWidth, nHeight);
+        }
+        break;
         case ControlType::Scrollbar:
         {
             bOK = s_pWidgetImplementation->drawScrollbar(aParameters, nWidth, nHeight);

vcl/inc/WidgetThemeLibrary.hxx

@@ -53,6 +53,10 @@ public:
     virtual bool drawSpinButtons(ControlDrawParameters const& rParameters, long nWidth,
                                  long nHeight);
     virtual bool drawSpinbox(ControlDrawParameters const& rParameters, long nWidth, long nHeight);
+    virtual bool drawTabItem(ControlDrawParameters const& rParameters, long nWidth, long nHeight);
+    virtual bool drawTabPane(ControlDrawParameters const& rParameters, long nWidth, long nHeight);
+    virtual bool drawTabHeader(ControlDrawParameters const& rParameters, long nWidth, long nHeight);
+    virtual bool drawTabBody(ControlDrawParameters const& rParameters, long nWidth, long nHeight);
     virtual bool drawWindowsBackground(ControlDrawParameters const& rParameters, long nWidth,
                                        long nHeight);
     virtual bool drawListbox(ControlDrawParameters const& rParameters, long nWidth, long nHeight);