javax.swing.JSlider#setOpaque ( )源码实例Demo

private void initializeComponents() {
	qualitySlider = new JSlider(10, 100, 50) {
		private static final long serialVersionUID = -3633632766184431178L;

		@Override
		public Dimension getPreferredSize() {
			return new Dimension(super.getPreferredSize().width/2, new JLabel(" ").getPreferredSize().height);
		}
	};
	qualitySlider.addChangeListener(ce -> r.refresh());
	
	qualitySlider.setOpaque(false);
	statusLabel = new JLabel();
	skipFrames = new JCheckBox("Skip frames", false);
	skipFrames.setOpaque(false);
}
 

private JSlider createSlider() {
	final JSlider slider = new JSlider();
	slider.setOpaque(false);
	slider.setMinimum(10);
	slider.setMaximum(200);
	slider.setValue(100);
	slider.setLabelTable(slider.createStandardLabels(50));
	slider.setMajorTickSpacing(100);
	slider.setMinorTickSpacing(10);
	slider.setExtent(20);
	// slider.setPaintLabels(true);
	// slider.setPaintTicks(true);
	// slider.setSnapToTicks(true);
	slider.addChangeListener(new ChangeListener() {
		@Override
		public void stateChanged(ChangeEvent e) {
			final int value = slider.getValue();
			refreshZoom(value);
		}
	});
	return slider;
}
 

protected JSlider createSlider() {
	JSlider slider = new JSlider(0, 1000);
	slider.setOpaque(false);
	slider.setName(SLIDER_NAME);
	installSliderListener(slider);
	return slider;
}
 

@Override
protected void installListeners(JSlider slider) {
	super.installListeners(slider);
	slider.removeMouseListener(trackListener);
	slider.removeMouseMotionListener(trackListener);
	slider.addMouseListener(myMouseListener);
	slider.addMouseMotionListener(myMouseListener);
	slider.setOpaque(false);
}
 

@Override
protected void installListeners(JSlider slider) {
	super.installListeners(slider);
	slider.removeMouseListener(trackListener);
	slider.removeMouseMotionListener(trackListener);
	slider.addMouseListener(myMouseListener);
	slider.addMouseMotionListener(myMouseListener);
	slider.setOpaque(false);
}
 

/**
 * Format animation controls and add them to a container. This includes
 * assigning the borders of all the components, assigning the PanelUI of the
 * container, assigning the preferred size of the container, and making a
 * spacebar on the slider trigger the toggle play button.
 * 
 * @param container
 *            this container is emptied, assigned a GridBagLayout, and the
 *            other arguments are added to this container.
 * @param togglePlayButton
 *            this button will be the left-most button. It is expected to
 *            always be visible.
 * @param buttons
 *            an optional collection of buttons to display after the
 *            togglePlayButton.
 * @param slider
 *            the slider that stretches to fill the remaining width.
 */
public static void format(JPanel container, final JButton togglePlayButton,
		JButton[] buttons, JSlider slider) {
	if (buttons == null)
		buttons = new JButton[] {};
	container.setUI(new GradientPanelUI(new Color(0xebebeb), Color.white));
	container.removeAll();
	container.setLayout(new GridBagLayout());
	GridBagConstraints c = new GridBagConstraints();
	c.gridx = 0;
	c.gridy = 0;
	c.weightx = 0;
	c.weighty = 1;
	c.fill = GridBagConstraints.VERTICAL;
	container.add(togglePlayButton, c);
	for (int a = 0; a < buttons.length; a++) {
		c.gridx++;
		container.add(buttons[a], c);
		buttons[a].setOpaque(false);
		buttons[a].setContentAreaFilled(false);
		buttons[a].setRolloverIcon(new DarkenedIcon(buttons[a], .5f));
		buttons[a].setPressedIcon(new DarkenedIcon(buttons[a], .75f));
		buttons[a].setBorder(new PartialLineBorder(Color.gray, new Insets(
				1, 0, 1, 1)));
	}
	c.weightx = 1;
	c.gridx++;
	c.fill = GridBagConstraints.BOTH;
	container.add(slider, c);

	togglePlayButton.setOpaque(false);
	togglePlayButton.setContentAreaFilled(false);
	togglePlayButton.setBorder(new LineBorder(Color.gray));
	slider.setOpaque(false);
	slider.setBorder(new PartialLineBorder(Color.gray, new Insets(1, 0, 1,
			1)));
	Dimension d = slider.getPreferredSize();
	d.width = 60;
	d.height = 25;
	slider.setPreferredSize((Dimension) d.clone());
	d.width = d.height;
	togglePlayButton.setPreferredSize(d);
	for (int a = 0; a < buttons.length; a++) {
		buttons[a].setPreferredSize(d);
	}

	InputMap inputMap = slider.getInputMap(JComponent.WHEN_FOCUSED);
	inputMap.put(KeyStroke.getKeyStroke(' '), "togglePlay");
	slider.getActionMap().put("togglePlay", new AbstractAction() {
		private static final long serialVersionUID = 1L;

		public void actionPerformed(ActionEvent e) {
			togglePlayButton.doClick();
		}
	});

	togglePlayButton.setFocusPainted(false);
	setInsetFocusBorder(togglePlayButton);
	for (JButton button : buttons) {
		button.setFocusPainted(false);
		setInsetFocusBorder(button);
	}
	setInsetFocusBorder(slider);
}