Swing Hacks

Blur Disabled Components #9

Chapter 1, Basic JComponents

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HACK

with each frame. For the second half of the animation, it shrinks and moves

to the right, making it appear to fade into nothing. Once the blind is calcu-

lated,

VenetianPane

draws the blind multiple times to cover the entire tab

content area, creating the effect seen in Figure 1-25.

This hack is quite extensible. With the power of Java2D you could add

translucency, blurs, OS X-like genie effects, or anything else you can dream

up. As a future enhancement, you could include more animation settings to

control the frame rate and transition time. If you do create more, please post

them on the Web for others to share.

H A C K

#9

Blur Disabled Components Hack #9

This hack explores creating how to perform a blur transformation on a Swing

component.

Every Swing component draws to the screen via the paintComponent( )

method. This is true even for components that offload the actual drawing to

Look and Feel UI objects. Because all drawing goes through the

paintComponent( ) method at some point, this point is where you can do

some interesting things by manipulating the graphics object during the paint

process.

Swing components draw to the

Graphics object passed in through the

paintComponent( ) method. This means that if you replace the Graphics

object with a custom version, you can capture a component’s drawing into a

bitmap instead of going straight to ...