- // we have to handle both: one for the normal case and the other for
- // wxCB_READONLY
- case WM_CTLCOLOREDIT:
- case WM_CTLCOLORSTATIC:
- WXHDC hdc;
- WXHWND hwnd;
- UnpackCtlColor(wParam, lParam, &hdc, &hwnd);
-
- return (WXLRESULT)OnCtlColor(hdc, hwnd, 0, nMsg, wParam, lParam);
-
- case CB_SETCURSEL:
- // Selection was set with SetSelection. Update the value too.
- if ((int)wParam > GetCount())
- m_value = wxEmptyString;
- else
- m_value = GetString(wParam);
- break;
-
+ case WM_SIZE:
+ // wxStaticBox can generate this message, when modifying the control's style.
+ // This causes the content of the combobox to be selected, for some reason.
+ case WM_STYLECHANGED:
+ {
+ // combobox selection sometimes spontaneously changes when its
+ // size changes, restore it to the old value if necessary
+ if ( !GetEditHWNDIfAvailable() )
+ break;
+
+ long fromOld, toOld;
+ GetSelection(&fromOld, &toOld);
+
+ // if an editable combobox has a not empty text not from the
+ // list, it tries to autocomplete it from the list when it is
+ // resized, but we don't want this to happen as it doesn't seem
+ // to make any sense, so we forcefully restore the old text
+ wxString textOld;
+ if ( !HasFlag(wxCB_READONLY) && GetCurrentSelection() == -1 )
+ textOld = GetValue();
+
+ // eliminate flickering during following hacks
+ wxWindowUpdateLocker lock(this);
+
+ WXLRESULT result = wxChoice::MSWWindowProc(nMsg, wParam, lParam);
+
+ if ( !textOld.empty() && GetValue() != textOld )
+ SetLabel(textOld);
+
+ long fromNew, toNew;
+ GetSelection(&fromNew, &toNew);
+
+ if ( fromOld != fromNew || toOld != toNew )
+ {
+ SetSelection(fromOld, toOld);
+ }
+
+ return result;
+ }