control scroll without window scroll

[delorian0815]

Hi,
I programmed a windows forms application. it contains several pictureBoxes, each showing the first picture in a folder. When the mouse is over the pictureBox and you turn your mousewheel, it shows the next/prev picture.

This works fine. The picturebox is getting focus when the mouse enters and the picture changes with the wheel.

But the window is scrolling, too.

How can i prevent the window scroll when one of the pictureBoxes has focus?

[tlhintoq]

You could change the display mode to 'zoom' so the entire image fits in the PictureBox; then there is nothing to scroll.

[delorian0815]

I use Zoom already. It's not that I want to scroll the image. I use the mousewheel to go to the next/prev image in that folder.

I have a folder with (let's say) 100 subfolders containing pictures. for each subfolder there is a picturebox (400x400 Pixels) showing the first picture in the subfolder. When I move the mouse onto the picture and use the wheel I want it to show the next or the previous picture.
It does that, but it scrolls the the main window up or down, too. And the is what I want to prevent.

[tlhintoq]

It does that, but it scrolls the the main window up or down, too. And the is what I want to prevent.

Oh... the main window. I thought it was scrolling the newly placed image in the PictureWindow. My mistake.

Have you tried putting a handler in the main window as an override of the scroll?

You may want to have a bool that changes when you go in and out of the picturebox. When in the picture box the main window handler does not call the base.scroll. When NOT in the picturebox is does call the base.scroll so the window behaves normally.

I haven't tested this personally but think it should work.

[delorian0815]

Thank you it worked just fine.
I had to put a bool in both the main window and the picturebox, because the picturebox wouldn't lose focus when the mouse leaves.

thanks again.