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Re: JTabbedPane when smoo

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  To: comp.lang.java.gui
In article <4886fab2$1@news.uni-rostock.de>,
 Stefan Rybacki <noemail@noemail.foobar> wrote:

> Hi there,
> 
> I try to implement a JTabbedPane version that provides a smooth 
> transition when changing tabs.
> This is done by overriding setSelectedIndex. There the current content
> is stored in a BufferedImage and then super.setSelectedIndex is called.
> In the paint method the bufferedImage is used to draw above content 
> painted by super.paint using an AlphaComposite with alpha values from 0 
> to 1.
> This works as expected as long as there are no JTextFields in the target 
> tab. In that case the text fields pop up for an instant on tab change 
> (just the text fields no other component like JButton, JCheckBox etc.)
> After that the transition goes smoothly.
> Also weird is that this happens only the first time that tab is 
> displayed, afterwards changing to that tab works as expected.
> The effect only occurs again, when the tabbed pane changes its bounds.
> 
> Any ideas on where to look to solve this issue?

If the image is not completely opaque, might this be the problem:

<http://java.sun.com/javase/6/docs/api/javax/swing/JComponent.html#paintC
omponent(java.awt.Graphics)>

-- 
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews

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JTabbedPane when smooth t "Stefan Rybacki" <stefan.rybacki@THRWHITE.remove-dii-this> - 2011-04-27 15:47 +0000
  Re: JTabbedPane when smoo "John B. Matthews" <john.b..matthews@THRWHITE.remove-dii-this> - 2011-04-27 15:47 +0000

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