filebot/source/net/sourceforge/tuned/ui/SelectButton.java

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Java
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package net.sourceforge.tuned.ui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.GeneralPath;
import java.awt.geom.Path2D;
import java.util.List;
import java.util.Map;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.SwingConstants;
public class SelectButton<T> extends JButton implements ActionListener {
private boolean hover = false;
private Color beginColor = Color.decode("#F0EEE4");
private Color endColor = Color.decode("#E0DED4");
private Color beginColorHover = beginColor;
private Color endColorHover = Color.decode("#D8D7CD");
private T selectedValue = null;
private List<T> options;
private Map<T, ? extends Icon> icons;
public static final String SELECTED_VALUE_PROPERTY = "SELECTED_VALUE_PROPERTY";
public SelectButton(List<T> options, Map<T, ? extends Icon> icons) {
this.options = options;
this.icons = icons;
setContentAreaFilled(false);
setFocusable(false);
addActionListener(this);
setHorizontalAlignment(SwingConstants.CENTER);
setVerticalAlignment(SwingConstants.CENTER);
addMouseListener(new MouseInputListener());
// select first option
setSelectedValue(options.iterator().next());
setPreferredSize(new Dimension(32, 22));
}
public void setSelectedValue(T value) {
if (selectedValue == value)
return;
T oldSelectedValue = selectedValue;
selectedValue = value;
Icon icon = icons.get(selectedValue);
setIcon(new SelectIcon(icon));
firePropertyChange(SELECTED_VALUE_PROPERTY, oldSelectedValue, selectedValue);
}
public T getSelectedValue() {
return selectedValue;
}
public void actionPerformed(ActionEvent e) {
JPopupMenu popup = new JPopupMenu();
for (T option : options) {
popup.add(new SelectMenuIem(option));
}
popup.show(this, 0, getHeight() - 1);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
if (hover)
g2d.setPaint(GradientStyle.TOP_TO_BOTTOM.getGradientPaint(getBounds(), beginColorHover, endColorHover));
else
g2d.setPaint(GradientStyle.TOP_TO_BOTTOM.getGradientPaint(getBounds(), beginColor, endColor));
g2d.fill(getBounds());
super.paintComponent(g);
}
private class SelectMenuIem extends JMenuItem implements ActionListener {
private T value;
public SelectMenuIem(T value) {
super(value.toString(), icons.get(value));
this.value = value;
this.setMargin(new Insets(3, 0, 3, 0));
this.addActionListener(this);
if (this.value == getSelectedValue())
this.setFont(this.getFont().deriveFont(Font.BOLD));
}
public void actionPerformed(ActionEvent e) {
setSelectedValue(value);
}
}
private static class SelectIcon implements Icon {
private Icon icon;
private GeneralPath arrow;
public SelectIcon(Icon icon) {
this.icon = icon;
arrow = new GeneralPath(Path2D.WIND_EVEN_ODD, 3);
int x = 25;
int y = 10;
arrow.moveTo(x - 2, y);
arrow.lineTo(x, y + 3);
arrow.lineTo(x + 3, y);
arrow.lineTo(x - 2, y);
}
public synchronized void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2d = (Graphics2D) g;
icon.paintIcon(c, g2d, 4, 3);
g2d.setPaint(Color.BLACK);
g2d.fill(arrow);
}
public int getIconWidth() {
return 30;
}
public int getIconHeight() {
return 20;
}
}
private class MouseInputListener extends MouseAdapter {
@Override
public void mouseEntered(MouseEvent e) {
hover = true;
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
hover = false;
repaint();
}
}
}