How do you get scrollbars to work in C?
 

Dear all,

As you probably know by now I am trying to build an app to output some info to a window. I have got to the stage where I can put the text into the window and allow the user to resize and move it, updating the window as necessary.

I now want to add a horizontal and vertical scroll gadget so that the user can scroll the text if the window is smaller than the data in it.

There is a thread here -> http://eab.abime.net/showthread.php?...=scroll+gadget on these forums showing how to do it in assembler but I cannot find any information as to how to do it in c.

So far I think you need to set up a list of your gadgets and pass this to something and then watch for various signals. I'm already doing the latter for the resize so have a good handle on these - although I am not sure which signals to look for, or what tags I need to add to my open window.

Could someone point me at an easy to follow example for setting up and reading the status etc of a horizontal and vertical scroll bar in C?

Many thanks.

Here is a full working example. Not sure if it helps, it lacks any comments.

Hi Thomas,

Many thanks for the code and sorry for not replying sooner. You are correct though without comments I'm doing a lot of head scratching. Is it OK if I come back asking about the bits I'm stumped on?

I added comments to the source code already some time ago. But without any feedback from you I didn't bother to upload it.

Of course you are welcome to ask about anything you don't understand.

Note: the tabulator size in my code is 4. The comments and indention might look a bit unaligned if you use a different tab size.

4 for a tab , everyone knows it should be three :)