| /* |
| * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.swing.plaf.basic; |
| |
| import sun.swing.SwingUtilities2; |
| import sun.awt.AppContext; |
| |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.io.Serializable; |
| import javax.swing.*; |
| import javax.swing.border.*; |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Set; |
| import javax.swing.plaf.ButtonUI; |
| import javax.swing.plaf.UIResource; |
| import javax.swing.plaf.ComponentUI; |
| import javax.swing.text.View; |
| |
| /** |
| * BasicButton implementation |
| * |
| * @author Jeff Dinkins |
| */ |
| public class BasicButtonUI extends ButtonUI{ |
| // Visual constants |
| // NOTE: This is not used or set any where. Were we allowed to remove |
| // fields, this would be removed. |
| /** |
| * The default gap between a text and an icon. |
| */ |
| protected int defaultTextIconGap; |
| |
| // Amount to offset text, the value of this comes from |
| // defaultTextShiftOffset once setTextShiftOffset has been invoked. |
| private int shiftOffset = 0; |
| // Value that is set in shiftOffset once setTextShiftOffset has been |
| // invoked. The value of this comes from the defaults table. |
| /** |
| * The default offset of a text. |
| */ |
| protected int defaultTextShiftOffset; |
| |
| private static final String propertyPrefix = "Button" + "."; |
| |
| private static final Object BASIC_BUTTON_UI_KEY = new Object(); |
| |
| private KeyListener keyListener = null; |
| |
| // ******************************** |
| // Create PLAF |
| // ******************************** |
| /** |
| * Returns an instance of {@code BasicButtonUI}. |
| * |
| * @param c a component |
| * @return an instance of {@code BasicButtonUI} |
| */ |
| public static ComponentUI createUI(JComponent c) { |
| AppContext appContext = AppContext.getAppContext(); |
| BasicButtonUI buttonUI = |
| (BasicButtonUI) appContext.get(BASIC_BUTTON_UI_KEY); |
| if (buttonUI == null) { |
| buttonUI = new BasicButtonUI(); |
| appContext.put(BASIC_BUTTON_UI_KEY, buttonUI); |
| } |
| return buttonUI; |
| } |
| |
| /** |
| * Returns the property prefix. |
| * |
| * @return the property prefix |
| */ |
| protected String getPropertyPrefix() { |
| return propertyPrefix; |
| } |
| |
| |
| // ******************************** |
| // Install PLAF |
| // ******************************** |
| public void installUI(JComponent c) { |
| installDefaults((AbstractButton) c); |
| installListeners((AbstractButton) c); |
| installKeyboardActions((AbstractButton) c); |
| BasicHTML.updateRenderer(c, ((AbstractButton) c).getText()); |
| } |
| |
| /** |
| * Installs default properties. |
| * |
| * @param b an abstract button |
| */ |
| protected void installDefaults(AbstractButton b) { |
| // load shared instance defaults |
| String pp = getPropertyPrefix(); |
| |
| defaultTextShiftOffset = UIManager.getInt(pp + "textShiftOffset"); |
| |
| // set the following defaults on the button |
| if (b.isContentAreaFilled()) { |
| LookAndFeel.installProperty(b, "opaque", Boolean.TRUE); |
| } else { |
| LookAndFeel.installProperty(b, "opaque", Boolean.FALSE); |
| } |
| |
| if(b.getMargin() == null || (b.getMargin() instanceof UIResource)) { |
| b.setMargin(UIManager.getInsets(pp + "margin")); |
| } |
| |
| LookAndFeel.installColorsAndFont(b, pp + "background", |
| pp + "foreground", pp + "font"); |
| LookAndFeel.installBorder(b, pp + "border"); |
| |
| Object rollover = UIManager.get(pp + "rollover"); |
| if (rollover != null) { |
| LookAndFeel.installProperty(b, "rolloverEnabled", rollover); |
| } |
| |
| LookAndFeel.installProperty(b, "iconTextGap", Integer.valueOf(4)); |
| } |
| |
| /** |
| * Registers listeners. |
| * |
| * @param b an abstract button |
| */ |
| protected void installListeners(AbstractButton b) { |
| BasicButtonListener listener = createButtonListener(b); |
| if(listener != null) { |
| b.addMouseListener(listener); |
| b.addMouseMotionListener(listener); |
| b.addFocusListener(listener); |
| b.addPropertyChangeListener(listener); |
| b.addChangeListener(listener); |
| } |
| |
| if (b instanceof JToggleButton) { |
| keyListener = createKeyListener(); |
| b.addKeyListener(keyListener); |
| |
| // Need to get traversal key event |
| b.setFocusTraversalKeysEnabled(false); |
| |
| // Map actions to the arrow keys |
| b.getActionMap().put("Previous", new BasicButtonUI.SelectPreviousBtn()); |
| b.getActionMap().put("Next", new BasicButtonUI.SelectNextBtn()); |
| |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT). |
| put(KeyStroke.getKeyStroke("UP"), "Previous"); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT). |
| put(KeyStroke.getKeyStroke("DOWN"), "Next"); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT). |
| put(KeyStroke.getKeyStroke("LEFT"), "Previous"); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT). |
| put(KeyStroke.getKeyStroke("RIGHT"), "Next"); |
| } |
| } |
| |
| /** |
| * Registers keyboard actions. |
| * |
| * @param b an abstract button |
| */ |
| protected void installKeyboardActions(AbstractButton b){ |
| BasicButtonListener listener = getButtonListener(b); |
| |
| if(listener != null) { |
| listener.installKeyboardActions(b); |
| } |
| } |
| |
| |
| // ******************************** |
| // Uninstall PLAF |
| // ******************************** |
| public void uninstallUI(JComponent c) { |
| uninstallKeyboardActions((AbstractButton) c); |
| uninstallListeners((AbstractButton) c); |
| uninstallDefaults((AbstractButton) c); |
| BasicHTML.updateRenderer(c, ""); |
| } |
| |
| /** |
| * Unregisters keyboard actions. |
| * |
| * @param b an abstract button |
| */ |
| protected void uninstallKeyboardActions(AbstractButton b) { |
| BasicButtonListener listener = getButtonListener(b); |
| if(listener != null) { |
| listener.uninstallKeyboardActions(b); |
| } |
| } |
| |
| /** |
| * Unregisters listeners. |
| * |
| * @param b an abstract button |
| */ |
| protected void uninstallListeners(AbstractButton b) { |
| BasicButtonListener listener = getButtonListener(b); |
| if(listener != null) { |
| b.removeMouseListener(listener); |
| b.removeMouseMotionListener(listener); |
| b.removeFocusListener(listener); |
| b.removeChangeListener(listener); |
| b.removePropertyChangeListener(listener); |
| } |
| if (b instanceof JToggleButton) { |
| // Unmap actions from the arrow keys |
| b.getActionMap().remove("Previous"); |
| b.getActionMap().remove("Next"); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) |
| .remove(KeyStroke.getKeyStroke("UP")); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) |
| .remove(KeyStroke.getKeyStroke("DOWN")); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) |
| .remove(KeyStroke.getKeyStroke("LEFT")); |
| b.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) |
| .remove(KeyStroke.getKeyStroke("RIGHT")); |
| |
| if (keyListener != null) { |
| b.removeKeyListener(keyListener); |
| keyListener = null; |
| } |
| } |
| } |
| |
| /** |
| * Uninstalls default properties. |
| * |
| * @param b an abstract button |
| */ |
| protected void uninstallDefaults(AbstractButton b) { |
| LookAndFeel.uninstallBorder(b); |
| } |
| |
| // ******************************** |
| // Create Listeners |
| // ******************************** |
| /** |
| * Returns a new instance of {@code BasicButtonListener}. |
| * |
| * @param b an abstract button |
| * @return a new instance of {@code BasicButtonListener} |
| */ |
| protected BasicButtonListener createButtonListener(AbstractButton b) { |
| return new BasicButtonListener(b); |
| } |
| |
| /** |
| * Returns the default gap between a text and an icon. |
| * |
| * @param b an abstract button |
| * @return the default gap between text and an icon |
| */ |
| public int getDefaultTextIconGap(AbstractButton b) { |
| return defaultTextIconGap; |
| } |
| |
| /* These rectangles/insets are allocated once for all |
| * ButtonUI.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 Rectangle viewRect = new Rectangle(); |
| private static Rectangle textRect = new Rectangle(); |
| private static Rectangle iconRect = new Rectangle(); |
| |
| // ******************************** |
| // Paint Methods |
| // ******************************** |
| |
| public void paint(Graphics g, JComponent c) |
| { |
| AbstractButton b = (AbstractButton) c; |
| ButtonModel model = b.getModel(); |
| |
| String text = layout(b, SwingUtilities2.getFontMetrics(b, g), |
| b.getWidth(), b.getHeight()); |
| |
| clearTextShiftOffset(); |
| |
| // perform UI specific press action, e.g. Windows L&F shifts text |
| if (model.isArmed() && model.isPressed()) { |
| paintButtonPressed(g,b); |
| } |
| |
| // Paint the Icon |
| if(b.getIcon() != null) { |
| paintIcon(g,c,iconRect); |
| } |
| |
| if (text != null && !text.equals("")){ |
| View v = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (v != null) { |
| v.paint(g, textRect); |
| } else { |
| paintText(g, b, textRect, text); |
| } |
| } |
| |
| if (b.isFocusPainted() && b.hasFocus()) { |
| // paint UI specific focus |
| paintFocus(g,b,viewRect,textRect,iconRect); |
| } |
| } |
| |
| /** |
| * Paints an icon of the current button. |
| * |
| * @param g an instance of {@code Graphics} |
| * @param c a component |
| * @param iconRect a bounding rectangle to render the icon |
| */ |
| protected void paintIcon(Graphics g, JComponent c, Rectangle iconRect){ |
| AbstractButton b = (AbstractButton) c; |
| ButtonModel model = b.getModel(); |
| Icon icon = b.getIcon(); |
| Icon tmpIcon = null; |
| |
| if(icon == null) { |
| return; |
| } |
| |
| Icon selectedIcon = null; |
| |
| /* the fallback icon should be based on the selected state */ |
| if (model.isSelected()) { |
| selectedIcon = b.getSelectedIcon(); |
| if (selectedIcon != null) { |
| icon = selectedIcon; |
| } |
| } |
| |
| if(!model.isEnabled()) { |
| if(model.isSelected()) { |
| tmpIcon = b.getDisabledSelectedIcon(); |
| if (tmpIcon == null) { |
| tmpIcon = selectedIcon; |
| } |
| } |
| |
| if (tmpIcon == null) { |
| tmpIcon = b.getDisabledIcon(); |
| } |
| } else if(model.isPressed() && model.isArmed()) { |
| tmpIcon = b.getPressedIcon(); |
| if(tmpIcon != null) { |
| // revert back to 0 offset |
| clearTextShiftOffset(); |
| } |
| } else if(b.isRolloverEnabled() && model.isRollover()) { |
| if(model.isSelected()) { |
| tmpIcon = b.getRolloverSelectedIcon(); |
| if (tmpIcon == null) { |
| tmpIcon = selectedIcon; |
| } |
| } |
| |
| if (tmpIcon == null) { |
| tmpIcon = b.getRolloverIcon(); |
| } |
| } |
| |
| if(tmpIcon != null) { |
| icon = tmpIcon; |
| } |
| |
| if(model.isPressed() && model.isArmed()) { |
| icon.paintIcon(c, g, iconRect.x + getTextShiftOffset(), |
| iconRect.y + getTextShiftOffset()); |
| } else { |
| icon.paintIcon(c, g, iconRect.x, iconRect.y); |
| } |
| |
| } |
| |
| /** |
| * Method which renders the text of the current button. |
| * |
| * As of Java 2 platform v 1.4 this method should not be used or overriden. |
| * Use the paintText method which takes the AbstractButton argument. |
| * |
| * @param g an instance of {@code Graphics} |
| * @param c a component |
| * @param textRect a bounding rectangle to render the text |
| * @param text a string to render |
| */ |
| protected void paintText(Graphics g, JComponent c, Rectangle textRect, String text) { |
| AbstractButton b = (AbstractButton) c; |
| ButtonModel model = b.getModel(); |
| FontMetrics fm = SwingUtilities2.getFontMetrics(c, g); |
| int mnemonicIndex = b.getDisplayedMnemonicIndex(); |
| |
| /* Draw the Text */ |
| if(model.isEnabled()) { |
| /*** paint the text normally */ |
| g.setColor(b.getForeground()); |
| SwingUtilities2.drawStringUnderlineCharAt(c, g,text, mnemonicIndex, |
| textRect.x + getTextShiftOffset(), |
| textRect.y + fm.getAscent() + getTextShiftOffset()); |
| } |
| else { |
| /*** paint the text disabled ***/ |
| g.setColor(b.getBackground().brighter()); |
| SwingUtilities2.drawStringUnderlineCharAt(c, g,text, mnemonicIndex, |
| textRect.x, textRect.y + fm.getAscent()); |
| g.setColor(b.getBackground().darker()); |
| SwingUtilities2.drawStringUnderlineCharAt(c, g,text, mnemonicIndex, |
| textRect.x - 1, textRect.y + fm.getAscent() - 1); |
| } |
| } |
| |
| /** |
| * Method which renders the text of the current button. |
| * |
| * @param g Graphics context |
| * @param b Current button to render |
| * @param textRect Bounding rectangle to render the text |
| * @param text String to render |
| * @since 1.4 |
| */ |
| protected void paintText(Graphics g, AbstractButton b, Rectangle textRect, String text) { |
| paintText(g, (JComponent)b, textRect, text); |
| } |
| |
| // Method signature defined here overriden in subclasses. |
| // Perhaps this class should be abstract? |
| /** |
| * Paints a focused button. |
| * |
| * @param g an instance of {@code Graphics} |
| * @param b an abstract button |
| * @param viewRect a bounding rectangle to render the button |
| * @param textRect a bounding rectangle to render the text |
| * @param iconRect a bounding rectangle to render the icon |
| */ |
| protected void paintFocus(Graphics g, AbstractButton b, |
| Rectangle viewRect, Rectangle textRect, Rectangle iconRect){ |
| } |
| |
| |
| /** |
| * Paints a pressed button. |
| * |
| * @param g an instance of {@code Graphics} |
| * @param b an abstract button |
| */ |
| protected void paintButtonPressed(Graphics g, AbstractButton b){ |
| } |
| |
| /** |
| * Clears the offset of the text. |
| */ |
| protected void clearTextShiftOffset(){ |
| this.shiftOffset = 0; |
| } |
| |
| /** |
| * Sets the offset of the text. |
| */ |
| protected void setTextShiftOffset(){ |
| this.shiftOffset = defaultTextShiftOffset; |
| } |
| |
| /** |
| * Returns the offset of the text. |
| * |
| * @return the offset of the text |
| */ |
| protected int getTextShiftOffset() { |
| return shiftOffset; |
| } |
| |
| // ******************************** |
| // Layout Methods |
| // ******************************** |
| public Dimension getMinimumSize(JComponent c) { |
| Dimension d = getPreferredSize(c); |
| View v = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (v != null) { |
| d.width -= v.getPreferredSpan(View.X_AXIS) - v.getMinimumSpan(View.X_AXIS); |
| } |
| return d; |
| } |
| |
| public Dimension getPreferredSize(JComponent c) { |
| AbstractButton b = (AbstractButton)c; |
| return BasicGraphicsUtils.getPreferredButtonSize(b, b.getIconTextGap()); |
| } |
| |
| public Dimension getMaximumSize(JComponent c) { |
| Dimension d = getPreferredSize(c); |
| View v = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (v != null) { |
| d.width += v.getMaximumSpan(View.X_AXIS) - v.getPreferredSpan(View.X_AXIS); |
| } |
| return d; |
| } |
| |
| /** |
| * Returns the baseline. |
| * |
| * @throws NullPointerException {@inheritDoc} |
| * @throws IllegalArgumentException {@inheritDoc} |
| * @see javax.swing.JComponent#getBaseline(int, int) |
| * @since 1.6 |
| */ |
| public int getBaseline(JComponent c, int width, int height) { |
| super.getBaseline(c, width, height); |
| AbstractButton b = (AbstractButton)c; |
| String text = b.getText(); |
| if (text == null || "".equals(text)) { |
| return -1; |
| } |
| FontMetrics fm = b.getFontMetrics(b.getFont()); |
| layout(b, fm, width, height); |
| return BasicHTML.getBaseline(b, textRect.y, fm.getAscent(), |
| textRect.width, textRect.height); |
| } |
| |
| /** |
| * Returns an enum indicating how the baseline of the component |
| * changes as the size changes. |
| * |
| * @throws NullPointerException {@inheritDoc} |
| * @see javax.swing.JComponent#getBaseline(int, int) |
| * @since 1.6 |
| */ |
| public Component.BaselineResizeBehavior getBaselineResizeBehavior( |
| JComponent c) { |
| super.getBaselineResizeBehavior(c); |
| if (c.getClientProperty(BasicHTML.propertyKey) != null) { |
| return Component.BaselineResizeBehavior.OTHER; |
| } |
| switch(((AbstractButton)c).getVerticalAlignment()) { |
| case AbstractButton.TOP: |
| return Component.BaselineResizeBehavior.CONSTANT_ASCENT; |
| case AbstractButton.BOTTOM: |
| return Component.BaselineResizeBehavior.CONSTANT_DESCENT; |
| case AbstractButton.CENTER: |
| return Component.BaselineResizeBehavior.CENTER_OFFSET; |
| } |
| return Component.BaselineResizeBehavior.OTHER; |
| } |
| |
| private String layout(AbstractButton b, FontMetrics fm, |
| int width, int height) { |
| Insets i = b.getInsets(); |
| viewRect.x = i.left; |
| viewRect.y = i.top; |
| viewRect.width = width - (i.right + viewRect.x); |
| viewRect.height = height - (i.bottom + viewRect.y); |
| |
| textRect.x = textRect.y = textRect.width = textRect.height = 0; |
| iconRect.x = iconRect.y = iconRect.width = iconRect.height = 0; |
| |
| // layout the text and icon |
| return SwingUtilities.layoutCompoundLabel( |
| b, fm, b.getText(), b.getIcon(), |
| b.getVerticalAlignment(), b.getHorizontalAlignment(), |
| b.getVerticalTextPosition(), b.getHorizontalTextPosition(), |
| viewRect, iconRect, textRect, |
| b.getText() == null ? 0 : b.getIconTextGap()); |
| } |
| |
| /** |
| * Returns the ButtonListener for the passed in Button, or null if one |
| * could not be found. |
| */ |
| private BasicButtonListener getButtonListener(AbstractButton b) { |
| MouseMotionListener[] listeners = b.getMouseMotionListeners(); |
| |
| if (listeners != null) { |
| for (MouseMotionListener listener : listeners) { |
| if (listener instanceof BasicButtonListener) { |
| return (BasicButtonListener) listener; |
| } |
| } |
| } |
| return null; |
| } |
| |
| /////////////////////////// Private functions //////////////////////// |
| /** |
| * Creates the key listener to handle tab navigation in JToggleButton Group. |
| */ |
| private KeyListener createKeyListener() { |
| if (keyListener == null) { |
| keyListener = new BasicButtonUI.KeyHandler(); |
| } |
| return keyListener; |
| } |
| |
| |
| private boolean isValidToggleButtonObj(Object obj) { |
| return ((obj instanceof JToggleButton) && |
| ((JToggleButton) obj).isVisible() && |
| ((JToggleButton) obj).isEnabled()); |
| } |
| |
| /** |
| * Select toggle button based on "Previous" or "Next" operation |
| * |
| * @param event, the event object. |
| * @param next, indicate if it's next one |
| */ |
| private void selectToggleButton(ActionEvent event, boolean next) { |
| // Get the source of the event. |
| Object eventSrc = event.getSource(); |
| |
| // Check whether the source is JToggleButton, it so, whether it is visible |
| if (!isValidToggleButtonObj(eventSrc)) |
| return; |
| |
| BasicButtonUI.ButtonGroupInfo btnGroupInfo = new BasicButtonUI.ButtonGroupInfo((JToggleButton)eventSrc); |
| btnGroupInfo.selectNewButton(next); |
| } |
| |
| /////////////////////////// Inner Classes //////////////////////// |
| @SuppressWarnings("serial") |
| private class SelectPreviousBtn extends AbstractAction { |
| public SelectPreviousBtn() { |
| super("Previous"); |
| } |
| |
| public void actionPerformed(ActionEvent e) { |
| BasicButtonUI.this.selectToggleButton(e, false); |
| } |
| } |
| |
| @SuppressWarnings("serial") |
| private class SelectNextBtn extends AbstractAction{ |
| public SelectNextBtn() { |
| super("Next"); |
| } |
| |
| public void actionPerformed(ActionEvent e) { |
| BasicButtonUI.this.selectToggleButton(e, true); |
| } |
| } |
| |
| /** |
| * ButtonGroupInfo, used to get related info in button group |
| * for given toggle button |
| */ |
| private class ButtonGroupInfo { |
| |
| JToggleButton activeBtn = null; |
| |
| JToggleButton firstBtn = null; |
| JToggleButton lastBtn = null; |
| |
| JToggleButton previousBtn = null; |
| JToggleButton nextBtn = null; |
| |
| HashSet<JToggleButton> btnsInGroup = null; |
| |
| boolean srcFound = false; |
| public ButtonGroupInfo(JToggleButton btn) { |
| activeBtn = btn; |
| btnsInGroup = new HashSet<JToggleButton>(); |
| } |
| |
| // Check if given object is in the button group |
| boolean containsInGroup(Object obj){ |
| return btnsInGroup.contains(obj); |
| } |
| |
| // Check if the next object to gain focus belongs |
| // to the button group or not |
| Component getFocusTransferBaseComponent(boolean next){ |
| return firstBtn; |
| } |
| |
| boolean getButtonGroupInfo() { |
| if (activeBtn == null) |
| return false; |
| |
| btnsInGroup.clear(); |
| |
| // Get the button model from the source. |
| ButtonModel model = activeBtn.getModel(); |
| if (!(model instanceof DefaultButtonModel)) |
| return false; |
| |
| // If the button model is DefaultButtonModel, and use it, otherwise return. |
| DefaultButtonModel bm = (DefaultButtonModel) model; |
| |
| // get the ButtonGroup of the button from the button model |
| ButtonGroup group = bm.getGroup(); |
| if (group == null) |
| return false; |
| |
| // Get all the buttons in the group |
| Enumeration<AbstractButton> e = group.getElements(); |
| if (e == null) |
| return false; |
| |
| while (e.hasMoreElements()) { |
| AbstractButton curElement = e.nextElement(); |
| if (!isValidToggleButtonObj(curElement)) |
| continue; |
| |
| btnsInGroup.add((JToggleButton) curElement); |
| |
| // If firstBtn is not set yet, curElement is that first button |
| if (null == firstBtn) |
| firstBtn = (JToggleButton) curElement; |
| |
| if (activeBtn == curElement) |
| srcFound = true; |
| else if (!srcFound) { |
| // The source has not been yet found and the current element |
| // is the last previousBtn |
| previousBtn = (JToggleButton) curElement; |
| } else if (nextBtn == null) { |
| // The source has been found and the current element |
| // is the next valid button of the list |
| nextBtn = (JToggleButton) curElement; |
| } |
| |
| // Set new last "valid" JToggleButton of the list |
| lastBtn = (JToggleButton) curElement; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Find the new toggle button that focus needs to be |
| * moved to in the group, select the button |
| * |
| * @param next, indicate if it's arrow up/left or down/right |
| */ |
| void selectNewButton(boolean next) { |
| if (!getButtonGroupInfo()) |
| return; |
| |
| if (srcFound) { |
| JToggleButton newSelectedBtn = null; |
| if (next) { |
| // Select Next button. Cycle to the first button if the source |
| // button is the last of the group. |
| newSelectedBtn = (null == nextBtn) ? firstBtn : nextBtn; |
| } else { |
| // Select previous button. Cycle to the last button if the source |
| // button is the first button of the group. |
| newSelectedBtn = (null == previousBtn) ? lastBtn : previousBtn; |
| } |
| if (newSelectedBtn != null && |
| (newSelectedBtn != activeBtn)) { |
| ButtonModel btnModel = newSelectedBtn.getModel(); |
| btnModel.setPressed(true); |
| btnModel.setArmed(true); |
| newSelectedBtn.requestFocusInWindow(); |
| newSelectedBtn.setSelected(true); |
| btnModel.setPressed(false); |
| btnModel.setArmed(false); |
| } |
| } |
| } |
| |
| /** |
| * Find the button group the passed in JToggleButton belongs to, and |
| * move focus to next component of the last button in the group |
| * or previous component of first button |
| * |
| * @param next, indicate if jump to next component or previous |
| */ |
| void jumpToNextComponent(boolean next) { |
| if (!getButtonGroupInfo()){ |
| // In case the button does not belong to any group, it needs |
| // to be treated as a component |
| if (activeBtn != null){ |
| lastBtn = activeBtn; |
| firstBtn = activeBtn; |
| } |
| else |
| return; |
| } |
| |
| // Update the component we will use as base to transfer |
| // focus from |
| JComponent compTransferFocusFrom = activeBtn; |
| |
| // If next component in the parent window is not in |
| // the button group, current active button will be |
| // base, otherwise, the base will be first or last |
| // button in the button group |
| Component focusBase = getFocusTransferBaseComponent(next); |
| if (focusBase != null){ |
| if (next) { |
| KeyboardFocusManager. |
| getCurrentKeyboardFocusManager().focusNextComponent(focusBase); |
| } else { |
| KeyboardFocusManager. |
| getCurrentKeyboardFocusManager().focusPreviousComponent(focusBase); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Togglebutton KeyListener |
| */ |
| private class KeyHandler implements KeyListener { |
| |
| // This listener checks if the key event is a focus traversal key event |
| // on a toggle button, consume the event if so and move the focus |
| // to next/previous component |
| public void keyPressed(KeyEvent e) { |
| AWTKeyStroke stroke = AWTKeyStroke.getAWTKeyStrokeForEvent(e); |
| if (stroke != null && e.getSource() instanceof JToggleButton) { |
| JToggleButton source = (JToggleButton) e.getSource(); |
| boolean next = isFocusTraversalKey(source, |
| KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, |
| stroke); |
| if (next || isFocusTraversalKey(source, |
| KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, |
| stroke)) { |
| e.consume(); |
| BasicButtonUI.ButtonGroupInfo btnGroupInfo = new BasicButtonUI.ButtonGroupInfo(source); |
| btnGroupInfo.jumpToNextComponent(next); |
| } |
| } |
| } |
| |
| private boolean isFocusTraversalKey(JComponent c, int id, |
| AWTKeyStroke stroke) { |
| Set<AWTKeyStroke> keys = c.getFocusTraversalKeys(id); |
| return keys != null && keys.contains(stroke); |
| } |
| |
| public void keyReleased(KeyEvent e) { |
| } |
| |
| public void keyTyped(KeyEvent e) { |
| } |
| } |
| |
| } |
