Best way to implement dynamic resizing of gadgets/windows

[Mafi]

Hi all!

If you've followed my previous threads, you'll know I'm writing a Reaction app in assembler. So far I've managed to workaround, or figure out all my issues, however I've got a question I'd like to throw out there. My app contains a button gadget (Reaction class) that renders an image in it (it's actually the image from an arbitrary .info file, so an icon). It renders fine; all good. However, sometimes the icon's width/height exceed the size of the button gadget and it's rendered outside the bounds, resizing the window to make it bigger fixes this. How should I best handle this scenario? 1. Detect that the gadget is too small and issue ChangeWindowBox() to scale the window by some factor; or 2. just scale the image so it fits in the gadget.

The layout class is a little primitive I feel, at least I haven't figured out a way that would have the gadget auto-resized (I've tried calling SetGadgetAttrs to modify the dimensions of the button, but the layout itself prevents it from resizing). Appreciate any feedback folks may have on this!

Cheers,
-Matt

I've attached screenshots showing what I'm talking about!

[thomas]

You use SetAttrs() to tell the button about the new GA_Image and then call WM_RETHINK on the window object. The window will resize itself if required.

[Mafi]

Thanks Thomas - will try this when I get home!

[Mafi]

Ok, I used SetAttrsA to update GA_Image (this works) of the button; but sending WM_RETHINK to the window object doesn't appear to do anything

-M

[thomas]

Check out this example. It does almost the same as your program.

First argument is path to directory with pictures.

[Mafi]

Originally Posted by thomas

Check out this example. It does almost the same as your program.

First argument is path to directory with pictures.

Thanks Thomas, yes this is what I had in mind. The only difference I can see is that in your code GA_Image is a pointer to a bitmap class object whereas mine is a pointer to the bitmap at do_Gadget->gg_GadgetRender. I wouldn’t have thought that would matter though?

[thomas]

Well, I changed the example to use icons rather than bitmaps and it still works for me.

[Mafi]

Originally Posted by thomas

Well, I changed the example to use icons rather than bitmaps and it still works for me.

Ok, fixed. I had CHILD_MinWidth and CHILD_MinHeight set. Even though some bitmaps were larger than that, the button wouldn’t resize after WM_RETHINK. I removed these and now it’s working perfectly.

Thanks again.
-M