PAINT COLORFUL BUBBLES WITH YOUR MOUSE!
In the next three chapters, we’ll build BubbleDraw, an interactive, animated drawing app that lets the user draw floating, bouncy, colorful bubbles with their mouse in the desktop version and with their fingers in the mobile version!
The first version of the BubbleDraw app will look like Figure 9-1, with each bubble in a different random color. It will let the user draw bubbles of random colors whenever they click and drag the mouse on the app window. The user will also be able to change the size of the bubbles by scrolling the mouse wheel up and down or by using a scroll gesture on a trackpad or touchscreen. ...