This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Hi Im creating an app where I need that a rectangle be visible all the time over the background. So I created this:
But in this example the rectangle is draw using white color. How can I do something like a xor that react with the background color to make this rectangle visible with any background?
Thanks in advance!