4
我正在嘗試創建具有可互換皮膚組件的自定義JButton
。使用CardLayout
作爲切換機制,我難以在JButton
上橫跨JComponent
(即皮膚組件)。JButton的可互換JComponent皮膚
例如,
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
public final class SkinsDemo {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI(){
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new FlowLayout());
frame.add(new JSkinnableButton());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static final class JSkinnableButton extends JButton{
private static final long serialVersionUID = -5167346969674067012L;
protected JSkinnableButton(){
super();
setLayout(new CardLayout()); // for interchangeability
add(new JSkinComponent(), "Skin");
}
}
private static final class JSkinComponent extends JComponent{
private static final long serialVersionUID = 2172542865655802012L;
protected JSkinComponent(){
super();
setOpaque(true);
setLayout(new FlowLayout()); // need layout manager
setBackground(Color.CYAN);
add(new JLabel("Skin"));
}
@Override
protected void paintComponent(Graphics g){
Graphics gCopy = g.create();
gCopy.setColor(getBackground());
gCopy.fillRect(0, 0, getWidth(), getHeight());
gCopy.dispose();
}
}
}
這是一個非常原始的例子,但我認爲它明確地傳達了我的意圖。
而這JButton
將偵聽來自域對象的屬性更改事件,並將相應地更新它的顯示。
回來, '1)'你想通過使用LayoutManager,'3)'你想要多少皮膚來填充Color.CYAN整個JButton'2)',''4)'皮膚取決於JButton Events? – mKorbel
@mKorbel,我想通過'JComponent'的背景來填充整個'JButton'並使用'CardLayout'管理器,我希望能夠在3個不同的皮膚之間輕鬆切換,這些皮膚在接收到一個PropertyChangeEvent '。 – mre
爲什麼不只是改變'Icon',或者不太方便的'ButtonUI'? – trashgod