> Thanks. I have use resize function to resize the window, and > it's widget, it is OK.
That's good. > But has one problem, if the widget has > image in it, the image will not scale with it. How to make > the image also scale together with the widget? Well, scaling of images is actually quite a hard thing to do well. Fltk can do it for you, but the method it uses is deliberately simplistic to make it "low cost" to do quickly. The downside to that is that you can get some image degradation, and if you scale an image back and forth a few times, the image will probably be ruined... So, we need to understand how your images are being used: If your image is "fixed", e.g. it is known at build time and is being used to decorate the widget, e.g. as a background or etc., then you are actually best to store two copies of the image, one optimised for "portrait" layout, the other optimised for "landscape" layout, then switch between them accordingly as you resize the widget. If your widget is loaded dynamically, then you can resize it by manipulating the image data directly - I think that you are using fltk-2? (despite advice to the contrary...) in which case you want to study the test examples image.cxx and pixmap_browser.cxx and see how they scale the image to fit the widget. However, if you are likely to be flipping back and forth between orientations, you might still be better off caching a version of the image, so if you start out in portrait mode (for example) and switch to landscape mode, rather than discarding the portrait version of the image you should maybe cache it for later use, if the user later switches back to portrait you can re-use the cached version rather than resizing the active image again... SELEX Galileo Ltd Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England & Wales. Company no. 02426132 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
