Don't animate widgets on first show in Vista

Checkboxes would animate when first shown if they were checked.
This is unintentional and looks a bit odd in wizard for instance.
To fix this we simply check if the old state was set. Note that
this is safe because we will at least require the enabled state
flag to be set.

Task-number:253075
Reviewed-by: ogoffart

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gui/styles/qwindowsvistastyle.cpp b/src/gui/styles/qwindowsvistastyle.cpp
index 298207d..6f3017a 100644
--- a/src/gui/styles/qwindowsvistastyle.cpp
+++ b/src/gui/styles/qwindowsvistastyle.cpp
@@ -364,7 +364,8 @@ void QWindowsVistaStyle::drawPrimitive(PrimitiveElement element, const QStyleOpt
             w->setProperty("_q_stylestate", (int)option->state);
             w->setProperty("_q_stylerect", w->rect());
 
-            bool doTransition = ((state & State_Sunken)     != (oldState & State_Sunken) ||
+            bool doTransition = oldState && 
+                                ((state & State_Sunken)     != (oldState & State_Sunken) ||
                                  (state & State_On)         != (oldState & State_On)     ||
                                  (state & State_MouseOver)  != (oldState & State_MouseOver));