vcl: make slider ask if native drawing is supported

Slider drawing didn't we ask if native drawing is supported using
IsNativeControlSupported method.

Change-Id: I0672114337516ff763fd710d949ab6a982db2992

1 files changed, 24 insertions, 20 deletions

diff --git a/vcl/source/control/slider.cxx b/vcl/source/control/slider.cxx
index 61075e8b89e4..c2af3bf820bc 100644
--- a/vcl/source/control/slider.cxx
+++ b/vcl/source/control/slider.cxx
@@ -315,35 +315,39 @@ void Slider::ImplCalc( bool bUpdate )
 
 void Slider::ImplDraw(vcl::RenderContext& rRenderContext)
 {
-    DecorationView aDecoView(&rRenderContext);
-    DrawButtonFlags nStyle;
-    const StyleSettings& rStyleSettings = rRenderContext.GetSettings().GetStyleSettings();
-    bool bEnabled = IsEnabled();
-
     // do missing calculations
     if (mbCalcSize)
         ImplCalc(false);
 
     ControlPart nPart = (GetStyle() & WB_HORZ) ? ControlPart::TrackHorzArea : ControlPart::TrackVertArea;
-    ControlState nState = (IsEnabled() ? ControlState::ENABLED : ControlState::NONE);
-    nState |= (HasFocus() ? ControlState::FOCUSED : ControlState::NONE);
-    SliderValue sldValue;
 
-    sldValue.mnMin = mnMinRange;
-    sldValue.mnMax = mnMaxRange;
-    sldValue.mnCur = mnThumbPos;
-    sldValue.maThumbRect = maThumbRect;
-
-    if (IsMouseOver())
+    if (rRenderContext.IsNativeControlSupported(ControlType::Slider, nPart))
     {
-        if (maThumbRect.IsInside(GetPointerPosPixel()))
-            sldValue.mnThumbState |= ControlState::ROLLOVER;
+        ControlState nState = (IsEnabled() ? ControlState::ENABLED : ControlState::NONE);
+        nState |= (HasFocus() ? ControlState::FOCUSED : ControlState::NONE);
+
+        SliderValue aSliderValue;
+        aSliderValue.mnMin = mnMinRange;
+        aSliderValue.mnMax = mnMaxRange;
+        aSliderValue.mnCur = mnThumbPos;
+        aSliderValue.maThumbRect = maThumbRect;
+
+        if (IsMouseOver())
+        {
+            if (maThumbRect.IsInside(GetPointerPosPixel()))
+                aSliderValue.mnThumbState |= ControlState::ROLLOVER;
+        }
+
+        const tools::Rectangle aCtrlRegion(Point(0,0), GetOutputSizePixel());
+
+        if (rRenderContext.DrawNativeControl(ControlType::Slider, nPart, aCtrlRegion, nState, aSliderValue, OUString()))
+            return;
     }
 
-    const tools::Rectangle aCtrlRegion(Point(0,0), GetOutputSizePixel());
-    bool bNativeOK = rRenderContext.DrawNativeControl(ControlType::Slider, nPart, aCtrlRegion, nState, sldValue, OUString());
-    if (bNativeOK)
-        return;
+    DecorationView aDecoView(&rRenderContext);
+    DrawButtonFlags nStyle;
+    const StyleSettings& rStyleSettings = rRenderContext.GetSettings().GetStyleSettings();
+    bool bEnabled = IsEnabled();
 
     if (!maChannel1Rect.IsEmpty())
     {