Question

I want to build a desktop application – a map viewer , something like this : http://sunsite.ubc.ca/UBCMap/ in Java . Whenever someone hovers the mouse over a building on the map , there should be a balloon tool-tip saying something about that building on the map like its office phone number etc and that building should glow in the 2-d map. Can someone provide me some directions as to what framework should i use in Java to build something like this(e.g JavaFx) ? Is there any sample code which does something similar ?

Answer 1

If really all you have is an image and you want tooltips over it – here is a 30 second description.

• Subclass JPanel
• override paint() method to draw image
• Define some number of Shape objects (polygons, rects, etc…) as your “buildings” along with a text tooltip string
• override getTooltip in JPanel subclass. On each call iterate over your Shape objects, testing if the point is inside shape (shape has a method for this). return tooltip appropriate for Shape, or null if your mouse isn’t over shape
• if you want rollover effects, register MouseMotionListener and use it to find the “hover” shape. Call repaint() and render your “hover” in some special way.
• boom! you’re done

HINT: You will need to register your JPanel with TooltipManager most likely.