Ben, if you could edit the PNGs to add a 1% tone to the transparent areas (maybe with a batch process) this allows LC to accept the clicks within the image area.
The advantage of this is you could have a 1 % tone inside the area you need be active and completely transparent where you don’t want clicks to be active for example a circular button. The 1% tone should be indistinguishable from the transparent area and will still show the background through. Paul > On Mar 30, 2017, at 10:52 AM, Ben Rubinstein via use-livecode > <[email protected]> wrote: > > I have a group containing a grid of square images. > > Some of the images are gifs, some are pngs, and some of the latter have an > alpha channel with some transparent bits. > > The images are all used as buttons, to control something else - the images in > essence are labels or icons for the buttons. The images have 3d borders to > make them look more button-like. > > The problem is that the if the user happens to click in the transparent area > of an image, the target of the mouseup isn't the image but the card. But the > image is a button, so I want to catch mouseup anywhere in this square image. > > I thought that I might be able to use 'the mousecontrol', when the target was > the card, to find out which image the mouse was in when; but this too takes > account of the transparency of the image. > > I can see this is a really useful feature - but in this case I want the > opposite! Is there a flag somewhere, or another easy way to achieve this? > > The non-easy ways I'm aware of are: > - hide all the images and replace them with buttons referencing the > images > - re-compositing the images to flatten the alpha channel > - iterating through all the images - there are many, in a scrolling > group - testing for the mouseloc within the rect of each > > > Is there anything simpler than this, to treat an image as opaque for the > purposes of hit-testing? > > TIA > > Ben > > > > _______________________________________________ > use-livecode mailing list > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
