Mousehover too much delay when pictures change (winforms)

Question

I'm facing a problem in windowsforms. When I change the backgroundimage of a menubutton the delay is way too long, it takes around 1/2 seconds to change it. The reason why it's happening is not because of my computerspeed, I'm sure of that. Here's my code, I'm looking forward to someone that could help me out.

private void button1_MouseHover(object sender, EventArgs e)
    {
        button1.BackgroundImage = Properties.Resources.Tomb_of_the_Ancients_Portal;
        label1.Visible = true;
    }

    private void button1_MouseLeave(object sender, EventArgs e)
    {
        button1.BackgroundImage = Properties.Resources.Toxic_Sewers_Portal;
        label1.Visible = false;
    }

I tried MouseEnter, it does not effect the delay on the backgroundImage change, thanks for suggesting it tho. — DutchJelly, Mar 08 '17 at 20:10
I just compared MouseHover and MouseEnter and MouseEnter was much quicker — Blake Thingstad, Mar 08 '17 at 20:16
`button1.MouseEnter += (s, e) => { button1.BackgroundImage = Properties.Resources.Toxic_Sewers_Portal; label1.Visible = false; };` — Blake Thingstad, Mar 08 '17 at 20:27
where exactly do I place that in the code? I've got a good feeling about it! — DutchJelly, Mar 08 '17 at 20:31
where ever the button is created or in the constructor if the button is made in the designer — Blake Thingstad, Mar 08 '17 at 20:32
Ok thanks alot, I'll have to restart my pc because I did not run with debugger. I'm trying it as soon as possible! — DutchJelly, Mar 08 '17 at 20:35
If you don't see any performance difference in using MouseEnter then the performance issue is probably with the image itself. It might be better to have a property that gets the value of your image once instead of using Resources every time. I saw another answer of a question mention image resizing every time can take a while too. Would be helpful if the image is already sized correctly before assigning it to the backgroundimage. — Blake Thingstad, Mar 08 '17 at 20:58
ok I'll try that. the previous thing did not work, there still is a delay. — DutchJelly, Mar 08 '17 at 21:03
I did remove the ImageLayout.Stretch, but there still is a little, annoying delay. Any other suggestions? — DutchJelly, Mar 08 '17 at 21:09
try some of the suggestions [here](http://stackoverflow.com/questions/778095/windows-forms-using-backgroundimage-slows-down-drawing-of-the-forms-controls) — Blake Thingstad, Mar 08 '17 at 21:16
I think that the "public static class ControlHelper" is outdated.. — DutchJelly, Mar 08 '17 at 21:52

score -1 · Answer 1 · answered Mar 08 '17 at 20:10

-1

You can call .Refresh() on the button so it can redraw its graphics.

answered Mar 08 '17 at 20:10

Тодор Иванов

357
3
18

where do I exactly call it? on the mouseenter or on the mouseleave? – DutchJelly Mar 08 '17 at 20:25
on mouse enter, after setting the image. – Тодор Иванов Mar 08 '17 at 20:25
It's still not completely instant, but I guess it's faster.. Do you know of any way to make it instant like the colorchange of pretty much all buttons? – DutchJelly Mar 08 '17 at 20:29
As far as I know, this is the fastest way, I'm sorry :( – Тодор Иванов Mar 08 '17 at 20:32

Mousehover too much delay when pictures change (winforms)

1 Answers1