Determine correct checkbox size when using theme.

src/generic/datavgen.cpp

@@ -1152,9 +1152,7 @@ bool wxDataViewToggleRenderer::WXActivateCell(const wxRect& WXUNUSED(cellRect),
 
 wxSize wxDataViewToggleRenderer::GetSize() const
 {
-    // the window parameter is not used by GetCheckBoxSize() so it's
+    return wxRendererNative::Get().GetCheckBoxSize(GetView());
-    // safe to pass NULL
-    return wxRendererNative::Get().GetCheckBoxSize(NULL);
 }
 
 // ---------------------------------------------------------

src/generic/renderg.cpp

@@ -712,9 +712,9 @@ wxRendererGeneric::DrawCheckBox(wxWindow *WXUNUSED(win),
     }
 }
 
-wxSize wxRendererGeneric::GetCheckBoxSize(wxWindow *WXUNUSED(win))
+wxSize wxRendererGeneric::GetCheckBoxSize(wxWindow *win)
 {
-    return wxSize(16, 16);
+    return win->FromDIP(wxSize(16, 16));
 }
 
 void

src/msw/renderer.cpp

@@ -327,6 +327,8 @@ public:
                                     wxTitleBarButton button,
                                     int flags = 0);
 
+    virtual wxSize GetCheckBoxSize(wxWindow *win);
+
     virtual void DrawGauge(wxWindow* win,
                            wxDC& dc,
                            const wxRect& rect,
@@ -902,6 +904,21 @@ wxRendererXP::DrawTitleBarBitmap(wxWindow *win,
     DoDrawButtonLike(hTheme, part, dc, rect, flags);
 }
 
+wxSize wxRendererXP::GetCheckBoxSize(wxWindow* win)
+{
+    wxUxThemeHandle hTheme(win, L"BUTTON");
+    wxUxThemeEngine* const te = wxUxThemeEngine::Get();
+
+    if (te->IsThemePartDefined(hTheme, BP_CHECKBOX, 0))
+    {
+        SIZE checkSize;
+        te->GetThemePartSize(hTheme, NULL, BP_CHECKBOX, CBS_UNCHECKEDNORMAL, NULL, TS_DRAW, &checkSize);
+        return wxSize(checkSize.cx, checkSize.cy);
+    }
+    else
+        return m_rendererNative.GetCheckBoxSize(win);
+}
+
 void
 wxRendererXP::DrawCollapseButton(wxWindow *win,
                                  wxDC& dc,