Posted 15 years ago
by wpf.acp
Version: 9.1.0507
Platform: .NET 3.5
Environment: Windows Vista (32-bit)
I have discovered a rather annoying but probably quite a minor bug. I have emailed the sample project to support email.
The context is very specific. Consider a window with a ribbon. A ribbon contains a ComboBox with some items. Nothing fancy here yet and all works nice. Now consider a wizard is launched in a separate modal window as a response to some event. The wizard has just a few pages and one of them has RadioButtonList. After closing the window with the wizard about 2 out of 3 times one tries to show Combo's drop list and merely move a mouse down towards list entries, the Combo decides to simply close (without a mouse click). The item beneath the mouse cursor becomes a new selected item in the Combo. Strange!
I took me a while to strip down my application to bare bones needed to reproduce the issue. I have tried putting RadioButtonList on the main window and the bug did not occur. I tried getting rid of the wizard and just using RadioButtonList in a second window. Even then nothing strange happened.
To successfully reproduce the issue one must have a Combo in a ribbon on a main window and a RadioButtonList in one of the wizard's pages. I could not reproduce it in any other way. Unfortunately for me, the exact context that causes the bug is used in my own app.
I have been fooled before into thinking there was a bug in one of your controls only to be embarrassed by the fact that WPF's own controls displayed the same "buggy" behavior. This time I have compared your Combo to WPF's own and the latter shows no glitch in the same context.
The context is very specific. Consider a window with a ribbon. A ribbon contains a ComboBox with some items. Nothing fancy here yet and all works nice. Now consider a wizard is launched in a separate modal window as a response to some event. The wizard has just a few pages and one of them has RadioButtonList. After closing the window with the wizard about 2 out of 3 times one tries to show Combo's drop list and merely move a mouse down towards list entries, the Combo decides to simply close (without a mouse click). The item beneath the mouse cursor becomes a new selected item in the Combo. Strange!
I took me a while to strip down my application to bare bones needed to reproduce the issue. I have tried putting RadioButtonList on the main window and the bug did not occur. I tried getting rid of the wizard and just using RadioButtonList in a second window. Even then nothing strange happened.
To successfully reproduce the issue one must have a Combo in a ribbon on a main window and a RadioButtonList in one of the wizard's pages. I could not reproduce it in any other way. Unfortunately for me, the exact context that causes the bug is used in my own app.
I have been fooled before into thinking there was a bug in one of your controls only to be embarrassed by the fact that WPF's own controls displayed the same "buggy" behavior. This time I have compared your Combo to WPF's own and the latter shows no glitch in the same context.
