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472 lines
15 KiB
472 lines
15 KiB
/*
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* Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*/
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package javax.swing.plaf.basic;
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import sun.swing.SwingUtilities2;
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import sun.awt.AppContext;
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import java.awt.*;
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import java.awt.event.*;
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import java.io.Serializable;
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import javax.swing.*;
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import javax.swing.border.*;
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.plaf.ButtonUI;
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import javax.swing.plaf.UIResource;
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import javax.swing.plaf.ComponentUI;
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import javax.swing.text.View;
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/**
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* BasicButton implementation
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*
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* @author Jeff Dinkins
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*/
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public class BasicButtonUI extends ButtonUI{
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// Visual constants
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// NOTE: This is not used or set any where. Were we allowed to remove
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// fields, this would be removed.
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protected int defaultTextIconGap;
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// Amount to offset text, the value of this comes from
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// defaultTextShiftOffset once setTextShiftOffset has been invoked.
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private int shiftOffset = 0;
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// Value that is set in shiftOffset once setTextShiftOffset has been
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// invoked. The value of this comes from the defaults table.
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protected int defaultTextShiftOffset;
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private final static String propertyPrefix = "Button" + ".";
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private static final Object BASIC_BUTTON_UI_KEY = new Object();
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// ********************************
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// Create PLAF
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// ********************************
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public static ComponentUI createUI(JComponent c) {
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AppContext appContext = AppContext.getAppContext();
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BasicButtonUI buttonUI =
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(BasicButtonUI) appContext.get(BASIC_BUTTON_UI_KEY);
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if (buttonUI == null) {
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buttonUI = new BasicButtonUI();
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appContext.put(BASIC_BUTTON_UI_KEY, buttonUI);
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}
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return buttonUI;
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}
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protected String getPropertyPrefix() {
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return propertyPrefix;
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}
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// ********************************
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// Install PLAF
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// ********************************
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public void installUI(JComponent c) {
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installDefaults((AbstractButton) c);
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installListeners((AbstractButton) c);
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installKeyboardActions((AbstractButton) c);
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BasicHTML.updateRenderer(c, ((AbstractButton) c).getText());
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}
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protected void installDefaults(AbstractButton b) {
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// load shared instance defaults
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String pp = getPropertyPrefix();
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defaultTextShiftOffset = UIManager.getInt(pp + "textShiftOffset");
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// set the following defaults on the button
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if (b.isContentAreaFilled()) {
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LookAndFeel.installProperty(b, "opaque", Boolean.TRUE);
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} else {
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LookAndFeel.installProperty(b, "opaque", Boolean.FALSE);
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}
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if(b.getMargin() == null || (b.getMargin() instanceof UIResource)) {
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b.setMargin(UIManager.getInsets(pp + "margin"));
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}
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LookAndFeel.installColorsAndFont(b, pp + "background",
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pp + "foreground", pp + "font");
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LookAndFeel.installBorder(b, pp + "border");
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Object rollover = UIManager.get(pp + "rollover");
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if (rollover != null) {
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LookAndFeel.installProperty(b, "rolloverEnabled", rollover);
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}
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LookAndFeel.installProperty(b, "iconTextGap", Integer.valueOf(4));
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}
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protected void installListeners(AbstractButton b) {
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BasicButtonListener listener = createButtonListener(b);
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if(listener != null) {
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b.addMouseListener(listener);
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b.addMouseMotionListener(listener);
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b.addFocusListener(listener);
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b.addPropertyChangeListener(listener);
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b.addChangeListener(listener);
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}
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}
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protected void installKeyboardActions(AbstractButton b){
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BasicButtonListener listener = getButtonListener(b);
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if(listener != null) {
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listener.installKeyboardActions(b);
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}
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}
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// ********************************
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// Uninstall PLAF
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// ********************************
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public void uninstallUI(JComponent c) {
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uninstallKeyboardActions((AbstractButton) c);
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uninstallListeners((AbstractButton) c);
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uninstallDefaults((AbstractButton) c);
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BasicHTML.updateRenderer(c, "");
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}
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protected void uninstallKeyboardActions(AbstractButton b) {
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BasicButtonListener listener = getButtonListener(b);
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if(listener != null) {
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listener.uninstallKeyboardActions(b);
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}
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}
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protected void uninstallListeners(AbstractButton b) {
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BasicButtonListener listener = getButtonListener(b);
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if(listener != null) {
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b.removeMouseListener(listener);
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b.removeMouseMotionListener(listener);
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b.removeFocusListener(listener);
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b.removeChangeListener(listener);
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b.removePropertyChangeListener(listener);
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}
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}
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protected void uninstallDefaults(AbstractButton b) {
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LookAndFeel.uninstallBorder(b);
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}
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// ********************************
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// Create Listeners
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// ********************************
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protected BasicButtonListener createButtonListener(AbstractButton b) {
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return new BasicButtonListener(b);
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}
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public int getDefaultTextIconGap(AbstractButton b) {
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return defaultTextIconGap;
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}
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/* These rectangles/insets are allocated once for all
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* ButtonUI.paint() calls. Re-using rectangles rather than
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* allocating them in each paint call substantially reduced the time
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* it took paint to run. Obviously, this method can't be re-entered.
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*/
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private static Rectangle viewRect = new Rectangle();
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private static Rectangle textRect = new Rectangle();
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private static Rectangle iconRect = new Rectangle();
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// ********************************
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// Paint Methods
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// ********************************
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public void paint(Graphics g, JComponent c)
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{
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AbstractButton b = (AbstractButton) c;
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ButtonModel model = b.getModel();
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String text = layout(b, SwingUtilities2.getFontMetrics(b, g),
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b.getWidth(), b.getHeight());
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clearTextShiftOffset();
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// perform UI specific press action, e.g. Windows L&F shifts text
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if (model.isArmed() && model.isPressed()) {
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paintButtonPressed(g,b);
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}
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// Paint the Icon
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if(b.getIcon() != null) {
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paintIcon(g,c,iconRect);
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}
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if (text != null && !text.equals("")){
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View v = (View) c.getClientProperty(BasicHTML.propertyKey);
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if (v != null) {
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v.paint(g, textRect);
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} else {
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paintText(g, b, textRect, text);
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}
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}
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if (b.isFocusPainted() && b.hasFocus()) {
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// paint UI specific focus
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paintFocus(g,b,viewRect,textRect,iconRect);
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}
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}
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protected void paintIcon(Graphics g, JComponent c, Rectangle iconRect){
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AbstractButton b = (AbstractButton) c;
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ButtonModel model = b.getModel();
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Icon icon = b.getIcon();
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Icon tmpIcon = null;
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if(icon == null) {
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return;
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}
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Icon selectedIcon = null;
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/* the fallback icon should be based on the selected state */
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if (model.isSelected()) {
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selectedIcon = b.getSelectedIcon();
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if (selectedIcon != null) {
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icon = selectedIcon;
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}
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}
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if(!model.isEnabled()) {
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if(model.isSelected()) {
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tmpIcon = b.getDisabledSelectedIcon();
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if (tmpIcon == null) {
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tmpIcon = selectedIcon;
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}
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}
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if (tmpIcon == null) {
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tmpIcon = b.getDisabledIcon();
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}
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} else if(model.isPressed() && model.isArmed()) {
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tmpIcon = b.getPressedIcon();
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if(tmpIcon != null) {
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// revert back to 0 offset
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clearTextShiftOffset();
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}
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} else if(b.isRolloverEnabled() && model.isRollover()) {
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if(model.isSelected()) {
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tmpIcon = b.getRolloverSelectedIcon();
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if (tmpIcon == null) {
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tmpIcon = selectedIcon;
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}
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}
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if (tmpIcon == null) {
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tmpIcon = b.getRolloverIcon();
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}
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}
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if(tmpIcon != null) {
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icon = tmpIcon;
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}
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if(model.isPressed() && model.isArmed()) {
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icon.paintIcon(c, g, iconRect.x + getTextShiftOffset(),
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iconRect.y + getTextShiftOffset());
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} else {
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icon.paintIcon(c, g, iconRect.x, iconRect.y);
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}
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}
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/**
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* As of Java 2 platform v 1.4 this method should not be used or overriden.
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* Use the paintText method which takes the AbstractButton argument.
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*/
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protected void paintText(Graphics g, JComponent c, Rectangle textRect, String text) {
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AbstractButton b = (AbstractButton) c;
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ButtonModel model = b.getModel();
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FontMetrics fm = SwingUtilities2.getFontMetrics(c, g);
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int mnemonicIndex = b.getDisplayedMnemonicIndex();
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/* Draw the Text */
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if(model.isEnabled()) {
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/*** paint the text normally */
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g.setColor(b.getForeground());
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SwingUtilities2.drawStringUnderlineCharAt(c, g,text, mnemonicIndex,
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textRect.x + getTextShiftOffset(),
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textRect.y + fm.getAscent() + getTextShiftOffset());
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}
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else {
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/*** paint the text disabled ***/
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g.setColor(b.getBackground().brighter());
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SwingUtilities2.drawStringUnderlineCharAt(c, g,text, mnemonicIndex,
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textRect.x, textRect.y + fm.getAscent());
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g.setColor(b.getBackground().darker());
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SwingUtilities2.drawStringUnderlineCharAt(c, g,text, mnemonicIndex,
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textRect.x - 1, textRect.y + fm.getAscent() - 1);
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}
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}
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/**
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* Method which renders the text of the current button.
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* <p>
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* @param g Graphics context
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* @param b Current button to render
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* @param textRect Bounding rectangle to render the text.
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* @param text String to render
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* @since 1.4
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*/
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protected void paintText(Graphics g, AbstractButton b, Rectangle textRect, String text) {
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paintText(g, (JComponent)b, textRect, text);
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}
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// Method signature defined here overriden in subclasses.
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// Perhaps this class should be abstract?
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protected void paintFocus(Graphics g, AbstractButton b,
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Rectangle viewRect, Rectangle textRect, Rectangle iconRect){
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}
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protected void paintButtonPressed(Graphics g, AbstractButton b){
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}
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protected void clearTextShiftOffset(){
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this.shiftOffset = 0;
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}
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protected void setTextShiftOffset(){
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this.shiftOffset = defaultTextShiftOffset;
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}
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protected int getTextShiftOffset() {
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return shiftOffset;
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}
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// ********************************
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// Layout Methods
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// ********************************
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public Dimension getMinimumSize(JComponent c) {
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Dimension d = getPreferredSize(c);
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View v = (View) c.getClientProperty(BasicHTML.propertyKey);
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if (v != null) {
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d.width -= v.getPreferredSpan(View.X_AXIS) - v.getMinimumSpan(View.X_AXIS);
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}
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return d;
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}
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public Dimension getPreferredSize(JComponent c) {
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AbstractButton b = (AbstractButton)c;
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return BasicGraphicsUtils.getPreferredButtonSize(b, b.getIconTextGap());
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}
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public Dimension getMaximumSize(JComponent c) {
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Dimension d = getPreferredSize(c);
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View v = (View) c.getClientProperty(BasicHTML.propertyKey);
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if (v != null) {
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d.width += v.getMaximumSpan(View.X_AXIS) - v.getPreferredSpan(View.X_AXIS);
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}
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return d;
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}
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/**
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* Returns the baseline.
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*
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* @throws NullPointerException {@inheritDoc}
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* @throws IllegalArgumentException {@inheritDoc}
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* @see javax.swing.JComponent#getBaseline(int, int)
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* @since 1.6
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*/
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public int getBaseline(JComponent c, int width, int height) {
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super.getBaseline(c, width, height);
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AbstractButton b = (AbstractButton)c;
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String text = b.getText();
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if (text == null || "".equals(text)) {
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return -1;
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}
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FontMetrics fm = b.getFontMetrics(b.getFont());
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layout(b, fm, width, height);
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return BasicHTML.getBaseline(b, textRect.y, fm.getAscent(),
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textRect.width, textRect.height);
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}
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/**
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* Returns an enum indicating how the baseline of the component
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* changes as the size changes.
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*
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* @throws NullPointerException {@inheritDoc}
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* @see javax.swing.JComponent#getBaseline(int, int)
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* @since 1.6
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*/
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public Component.BaselineResizeBehavior getBaselineResizeBehavior(
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JComponent c) {
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super.getBaselineResizeBehavior(c);
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if (c.getClientProperty(BasicHTML.propertyKey) != null) {
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return Component.BaselineResizeBehavior.OTHER;
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}
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switch(((AbstractButton)c).getVerticalAlignment()) {
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case AbstractButton.TOP:
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return Component.BaselineResizeBehavior.CONSTANT_ASCENT;
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case AbstractButton.BOTTOM:
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return Component.BaselineResizeBehavior.CONSTANT_DESCENT;
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case AbstractButton.CENTER:
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return Component.BaselineResizeBehavior.CENTER_OFFSET;
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}
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return Component.BaselineResizeBehavior.OTHER;
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}
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private String layout(AbstractButton b, FontMetrics fm,
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int width, int height) {
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Insets i = b.getInsets();
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viewRect.x = i.left;
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viewRect.y = i.top;
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viewRect.width = width - (i.right + viewRect.x);
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viewRect.height = height - (i.bottom + viewRect.y);
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textRect.x = textRect.y = textRect.width = textRect.height = 0;
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iconRect.x = iconRect.y = iconRect.width = iconRect.height = 0;
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// layout the text and icon
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return SwingUtilities.layoutCompoundLabel(
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b, fm, b.getText(), b.getIcon(),
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b.getVerticalAlignment(), b.getHorizontalAlignment(),
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b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
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viewRect, iconRect, textRect,
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b.getText() == null ? 0 : b.getIconTextGap());
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}
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/**
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* Returns the ButtonListener for the passed in Button, or null if one
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* could not be found.
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*/
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private BasicButtonListener getButtonListener(AbstractButton b) {
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MouseMotionListener[] listeners = b.getMouseMotionListeners();
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if (listeners != null) {
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for (MouseMotionListener listener : listeners) {
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if (listener instanceof BasicButtonListener) {
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return (BasicButtonListener) listener;
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}
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}
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}
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return null;
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}
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}
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