custom widgets: Fix various warnings.

Change-Id: I5d657fa4d6f63b93ad3775a5641d08c6e0f3a615

vcl/inc/WidgetThemeLibrary.hxx

@@ -93,7 +93,7 @@ struct ControlDrawParameters
     int64_t nValue;
 };
 
-typedef struct _WidgetThemeLibrary WidgetThemeLibrary;
+typedef struct WidgetThemeLibrary_t WidgetThemeLibrary;
 
 typedef struct _rectangle
 {
@@ -101,7 +101,7 @@ typedef struct _rectangle
     long width, height;
 } rectangle_t;
 
-struct _WidgetThemeLibrary
+struct WidgetThemeLibrary_t
 {
     uint32_t nSize;
 

vcl/inc/headless/CustomWidgetDraw.hxx

@@ -28,7 +28,7 @@ private:
 
 public:
     CustomWidgetDraw(SvpSalGraphics& rGraphics);
-    virtual ~CustomWidgetDraw();
+    ~CustomWidgetDraw() override;
 
     bool isNativeControlSupported(ControlType eType, ControlPart ePart) override;
 

vcl/inc/salgdi.hxx

@@ -26,7 +26,7 @@
 #include "salgdiimpl.hxx"
 #include "sallayout.hxx"
 #include <basegfx/matrix/b2dhommatrix.hxx>
-#include <WidgetDrawInterface.hxx>
+#include "WidgetDrawInterface.hxx"
 
 #include <config_cairo_canvas.h>
 

vcl/source/window/menufloatingwindow.cxx

@@ -144,7 +144,7 @@ void MenuFloatingWindow::ApplySettings(vcl::RenderContext& rRenderContext)
         ImplGetFrame()->UpdateSettings(aSettings); // Update theme colors.
         StyleSettings aStyle(aSettings.GetStyleSettings());
         Color aHighlightTextColor = ImplGetSVData()->maNWFData.maMenuBarHighlightTextColor;
-        if (aHighlightTextColor != Color(COL_TRANSPARENT))
+        if (aHighlightTextColor != COL_TRANSPARENT)
         {
             aStyle.SetMenuHighlightTextColor(aHighlightTextColor);
         }