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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
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package javax.swing.plaf.basic;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import javax.swing.text.View;
import sun.swing.SwingUtilities2;
import sun.awt.AppContext;


RadioButtonUI implementation for BasicRadioButtonUI
Author:Jeff Dinkins
/** * RadioButtonUI implementation for BasicRadioButtonUI * * @author Jeff Dinkins */
public class BasicRadioButtonUI extends BasicToggleButtonUI { private static final Object BASIC_RADIO_BUTTON_UI_KEY = new Object(); protected Icon icon; private boolean defaults_initialized = false; private final static String propertyPrefix = "RadioButton" + "."; // ******************************** // Create PLAF // ******************************** public static ComponentUI createUI(JComponent b) { AppContext appContext = AppContext.getAppContext(); BasicRadioButtonUI radioButtonUI = (BasicRadioButtonUI) appContext.get(BASIC_RADIO_BUTTON_UI_KEY); if (radioButtonUI == null) { radioButtonUI = new BasicRadioButtonUI(); appContext.put(BASIC_RADIO_BUTTON_UI_KEY, radioButtonUI); } return radioButtonUI; } protected String getPropertyPrefix() { return propertyPrefix; } // ******************************** // Install PLAF // ******************************** protected void installDefaults(AbstractButton b){ super.installDefaults(b); if(!defaults_initialized) { icon = UIManager.getIcon(getPropertyPrefix() + "icon"); defaults_initialized = true; } } // ******************************** // Uninstall PLAF // ******************************** protected void uninstallDefaults(AbstractButton b){ super.uninstallDefaults(b); defaults_initialized = false; } public Icon getDefaultIcon() { return icon; } /* These Dimensions/Rectangles are allocated once for all * RadioButtonUI.paint() calls. Re-using rectangles * rather than allocating them in each paint call substantially * reduced the time it took paint to run. Obviously, this * method can't be re-entered. */ private static Dimension size = new Dimension(); private static Rectangle viewRect = new Rectangle(); private static Rectangle iconRect = new Rectangle(); private static Rectangle textRect = new Rectangle();
paint the radio button
/** * paint the radio button */
public synchronized void paint(Graphics g, JComponent c) { AbstractButton b = (AbstractButton) c; ButtonModel model = b.getModel(); Font f = c.getFont(); g.setFont(f); FontMetrics fm = SwingUtilities2.getFontMetrics(c, g, f); Insets i = c.getInsets(); size = b.getSize(size); viewRect.x = i.left; viewRect.y = i.top; viewRect.width = size.width - (i.right + viewRect.x); viewRect.height = size.height - (i.bottom + viewRect.y); iconRect.x = iconRect.y = iconRect.width = iconRect.height = 0; textRect.x = textRect.y = textRect.width = textRect.height = 0; Icon altIcon = b.getIcon(); Icon selectedIcon = null; Icon disabledIcon = null; String text = SwingUtilities.layoutCompoundLabel( c, fm, b.getText(), altIcon != null ? altIcon : getDefaultIcon(), b.getVerticalAlignment(), b.getHorizontalAlignment(), b.getVerticalTextPosition(), b.getHorizontalTextPosition(), viewRect, iconRect, textRect, b.getText() == null ? 0 : b.getIconTextGap()); // fill background if(c.isOpaque()) { g.setColor(b.getBackground()); g.fillRect(0,0, size.width, size.height); } // Paint the radio button if(altIcon != null) { if(!model.isEnabled()) { if(model.isSelected()) { altIcon = b.getDisabledSelectedIcon(); } else { altIcon = b.getDisabledIcon(); } } else if(model.isPressed() && model.isArmed()) { altIcon = b.getPressedIcon(); if(altIcon == null) { // Use selected icon altIcon = b.getSelectedIcon(); } } else if(model.isSelected()) { if(b.isRolloverEnabled() && model.isRollover()) { altIcon = b.getRolloverSelectedIcon(); if (altIcon == null) { altIcon = b.getSelectedIcon(); } } else { altIcon = b.getSelectedIcon(); } } else if(b.isRolloverEnabled() && model.isRollover()) { altIcon = b.getRolloverIcon(); } if(altIcon == null) { altIcon = b.getIcon(); } altIcon.paintIcon(c, g, iconRect.x, iconRect.y); } else { getDefaultIcon().paintIcon(c, g, iconRect.x, iconRect.y); } // Draw the Text if(text != null) { View v = (View) c.getClientProperty(BasicHTML.propertyKey); if (v != null) { v.paint(g, textRect); } else { paintText(g, b, textRect, text); } if(b.hasFocus() && b.isFocusPainted() && textRect.width > 0 && textRect.height > 0 ) { paintFocus(g, textRect, size); } } } protected void paintFocus(Graphics g, Rectangle textRect, Dimension size){ } /* These Insets/Rectangles are allocated once for all * RadioButtonUI.getPreferredSize() calls. Re-using rectangles * rather than allocating them in each call substantially * reduced the time it took getPreferredSize() to run. Obviously, * this method can't be re-entered. */ private static Rectangle prefViewRect = new Rectangle(); private static Rectangle prefIconRect = new Rectangle(); private static Rectangle prefTextRect = new Rectangle(); private static Insets prefInsets = new Insets(0, 0, 0, 0);
The preferred size of the radio button
/** * The preferred size of the radio button */
public Dimension getPreferredSize(JComponent c) { if(c.getComponentCount() > 0) { return null; } AbstractButton b = (AbstractButton) c; String text = b.getText(); Icon buttonIcon = b.getIcon(); if(buttonIcon == null) { buttonIcon = getDefaultIcon(); } Font font = b.getFont(); FontMetrics fm = b.getFontMetrics(font); prefViewRect.x = prefViewRect.y = 0; prefViewRect.width = Short.MAX_VALUE; prefViewRect.height = Short.MAX_VALUE; prefIconRect.x = prefIconRect.y = prefIconRect.width = prefIconRect.height = 0; prefTextRect.x = prefTextRect.y = prefTextRect.width = prefTextRect.height = 0; SwingUtilities.layoutCompoundLabel( c, fm, text, buttonIcon, b.getVerticalAlignment(), b.getHorizontalAlignment(), b.getVerticalTextPosition(), b.getHorizontalTextPosition(), prefViewRect, prefIconRect, prefTextRect, text == null ? 0 : b.getIconTextGap()); // find the union of the icon and text rects (from Rectangle.java) int x1 = Math.min(prefIconRect.x, prefTextRect.x); int x2 = Math.max(prefIconRect.x + prefIconRect.width, prefTextRect.x + prefTextRect.width); int y1 = Math.min(prefIconRect.y, prefTextRect.y); int y2 = Math.max(prefIconRect.y + prefIconRect.height, prefTextRect.y + prefTextRect.height); int width = x2 - x1; int height = y2 - y1; prefInsets = b.getInsets(prefInsets); width += prefInsets.left + prefInsets.right; height += prefInsets.top + prefInsets.bottom; return new Dimension(width, height); } }