Home/ Questions/Q 167537
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-11T12:17:34+00:00

I am creating a custom control using C# GDI+. Quick explanation…the control will be

  • 0

I am creating a custom control using C# GDI+.

Quick explanation…the control will be say 500 pixels on screen but will contain perhaps 500000 pixels of information. So although i’m only showing 500px at a time i need to obviously scroll in the horizontal plane (left & right). The tricky part is that each 500px chunk of bitmap takes a while (between 100ms – 1000ms) to render.

So my plan is to maintain a 1500px bitmap in memory. i.e. the 500px visible part and 500px either side of the visible area and draw the off-screen parts asynchronously as the user scrolls.

I would like some feedback, advice, criticism or examples of code to help me achieve this. It seems fairly straight forward but after a few initial test attempts its proving more difficult than one would imagine.

Thanks.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. The effectiveness of this approach depends on, amongst other things, the amount of moving around the user will do. If the user is making small movement, then stopping to consider the new information, this could work. However, if the user is whizzing back and forth, you’ll still have an issue.

    Does your application lend itself to gradually improving the quality of the image – i.e. providing a quick usable image and then improving it as the user stops to consider it?

    • 0