JButton - navrat k puvodnimu UI

Lukas Adamek | FAYN Telecommunications Thu, 21 Sep 2006 08:46:37 -0700

Zapomnel jsem uvest jednu dulezitou věc.

JPanelu, do ktereho JButton vkladam také definuji Background. A to je jadro pudla a problem, protože potom button.updateUI() nefunguje.

Zde uvadim kod:

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package test;

import java.awt.Color;

import java.awt.Container;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.plaf.metal.MetalButtonUI;

public class Main extends JFrame {

private JButton button;

private boolean prepnuti = false;

public Main() {

Container pane = this.getContentPane();

JPanel panel = new JPanel();

panel.setLayout(new FlowLayout());

panel.setBackground(new Color(0,0,250));

button = new JButton("Button");

button.setUI(new MetalButtonUI());

button.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

if (prepnuti) {

button.setBackground(new Color(255,0,0));

button.updateUI();

prepnuti = !prepnuti;

} else {

button.setBackground(null);

button.updateUI();

prepnuti = !prepnuti;

}

});

panel.add(button);

pane.add(panel);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

pack();

setVisible(true);

}

public static void main(String[] args) {

new Main();

}

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Ahoj.

Co treba takto:

updateUI

<http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JButton.html#updateUI%2

8%29> ()

Resets the UI property to a value from the current look and feel.

Vity

________________________________

From: konference-bounces na java.cz [mailto:konference-bounces na java.cz] On

Behalf Of Lukas Adamek | FAYN Telecommunications

Sent: Thursday, September 21, 2006 9:10 AM

To: konference na java.cz

Subject: JButton - navrat k puvodnimu UI

Ahoj

Potrebuji udelat blikajici

JButton activeButton;

Vzhled tlacitka nastavuji prikazem

activeButton.setUI(new MetalButtonUI());

Blikani delam jednoduse zmenou barvy pozadi, tj.

activeButton.setBackground(...);

Problem nastane, kdyz chci, aby tlacitko prestalo blikat. Tedy potrebuji

znovu nastavit vychozi UI. Nepomaha setBackground(null), znovupouziti setUI

a ani v prislusnem UI jsem nenasel zadnou funkci metodu, ktera by toho byla

schopna.

JButton - navrat k puvodnimu UI

Odpovedet emailem