Fixed size hint for combo box on windows

When you use larger fonts or DPI on windows, the combobox can
calculate a size hint that results of text eliding on items.
This fix removes some duplicate code in Vista style and adds
a dpi dependant size hint for XP style.

Task-number: QTBUG-7552
Reviewed-by: richard

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gui/styles/qwindowsxpstyle.cpp b/src/gui/styles/qwindowsxpstyle.cpp
index efb1224..8743807 100644
--- a/src/gui/styles/qwindowsxpstyle.cpp
+++ b/src/gui/styles/qwindowsxpstyle.cpp
@@ -3678,7 +3678,9 @@ QSize QWindowsXPStyle::sizeFromContents(ContentsType ct, const QStyleOption *opt
                     sz += QSize(borderSize.cxLeftWidth + borderSize.cxRightWidth - 2,
                                 borderSize.cyBottomHeight + borderSize.cyTopHeight - 2);
                 }
-                sz += QSize(23, 0); //arrow button
+                const int textMargins = 2*(proxy()->pixelMetric(PM_FocusFrameHMargin) + 1);
+                sz += QSize(qMax(pixelMetric(QStyle::PM_ScrollBarExtent, option, widget)
+                                 + textMargins, 23), 0); //arrow button
             }
         }
         break;