Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have a tabpage. And I have a combobox in it.
When I hover my mouse over it, my tabpage’s paint function runs.
Why?
The Combobox has no functions handled. It is just a Combobox.
I move the combobox out of the tabpage, and now the tabpage won’t paint when I hover my mouse over the combobox. Weird..
This isn’t specific to a TabPage, the same thing happens when you put the combo on a form. It is affected by visual styles, the container paint requests stop when you turn that off. I’m guessing it has something to do with the rounded corners you get when the DropDown property is set to DropDownList, the combo glows on a mouse hover. With it probably asking the container control to draw the pixels in the corner. Explaining it for DropDown = DropDown is harder.
Same thing happens with a Button, the container control paint is documented in the Reference Source to support transparency effects. Even if the button doesn’t have anything transparent. Visual styles is less than optimized like this, perhaps. It is otherwise very similar to what WPF does. Long story short, this is normal.