add support for alpha in color dialog on OSX, see #14127

[wxWidgets.git] / src / msw / anybutton.cpp

diff --git a/src/msw/anybutton.cpp b/src/msw/anybutton.cpp
index b8fc1ad197875ed900e1815a0192549dceb0c06f..cf561b548e5c32232f0b7f5c6bce458a1d23bd32 100644 (file)
--- a/src/msw/anybutton.cpp
+++ b/src/msw/anybutton.cpp
@@ -217,7 +217,7 @@ public:
     // the image list
     wxXPButtonImageData(wxAnyButton *btn, const wxBitmap& bitmap)
         : m_iml(bitmap.GetWidth(), bitmap.GetHeight(), true /* use mask */,
-                wxAnyButton::State_Max),
+                wxAnyButton::State_Max + 1 /* see "pulse" comment below */),
           m_hwndBtn(GetHwndOf(btn))
     {
         // initialize all bitmaps except for the disabled one to normal state
@@ -231,6 +231,20 @@ public:
 #endif
         }
 
+        // In addition to the states supported by wxWidgets such as normal,
+        // hot, pressed, disabled and focused, we need to add bitmap for
+        // another state when running under Windows 7 -- the so called "stylus
+        // hot" state corresponding to PBS_STYLUSHOT constant. While it's
+        // documented in MSDN as being only used with tablets, it is a lie as
+        // a focused button actually alternates between the image list elements
+        // with PBS_DEFAULTED and PBS_STYLUSHOT indices and, in particular,
+        // just disappears during half of the time if the latter is not set so
+        // we absolutely must set it.
+        //
+        // This also explains why we need to allocate an extra slot in the
+        // image list ctor above, the slot State_Max is used for this one.
+        m_iml.Add(bitmap);
+
         m_data.himl = GetHimagelistOf(&m_iml);
 
         // no margins by default
@@ -254,6 +268,11 @@ public:
     {
         m_iml.Replace(which, bitmap);
 
+        // As we want the focused button to always show its bitmap, we need to
+        // update the "stylus hot" one to match it to avoid any pulsing.
+        if ( which == wxAnyButton::State_Focused )
+            m_iml.Replace(wxAnyButton::State_Max, bitmap);
+
         UpdateImageInfo();
     }