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Diffstat (limited to 'libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java')
| -rw-r--r-- | libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java | 592 |
1 files changed, 592 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java b/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java new file mode 100644 index 000000000..e52293812 --- /dev/null +++ b/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java @@ -0,0 +1,592 @@ +/* BasicDesktopIconUI.java -- + Copyright (C) 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.swing.plaf.basic; + +import java.awt.BorderLayout; +import java.awt.Color; +import java.awt.Component; +import java.awt.Dimension; +import java.awt.Graphics; +import java.awt.Insets; +import java.awt.Rectangle; +import java.awt.event.ActionEvent; +import java.awt.event.ActionListener; +import java.awt.event.MouseEvent; +import java.beans.PropertyChangeEvent; +import java.beans.PropertyChangeListener; +import java.beans.PropertyVetoException; + +import javax.swing.Icon; +import javax.swing.JButton; +import javax.swing.JComponent; +import javax.swing.JDesktopPane; +import javax.swing.JInternalFrame; +import javax.swing.JInternalFrame.JDesktopIcon; +import javax.swing.SwingConstants; +import javax.swing.border.Border; +import javax.swing.event.MouseInputAdapter; +import javax.swing.event.MouseInputListener; +import javax.swing.plaf.ComponentUI; +import javax.swing.plaf.DesktopIconUI; + +/** + * This class acts as the UI delegate for JDesktopIcons for the Basic look and feel. + */ +public class BasicDesktopIconUI extends DesktopIconUI +{ + /** + * This helper class handles mouse events that occur on the JDesktopIcon. + */ + public class MouseInputHandler extends MouseInputAdapter + { + /** The x offset from the MouseEvent coordinates to the top left corner. */ + private transient int xOffset; + + /** The y offset fromt he MouseEvent coordinates to the top left corner. */ + private transient int yOffset; + + /** A cached value of the JDesktopPane that parents this JDesktopIcon. */ + private transient JDesktopPane pane; + + /** + * This method is called when the mouse is dragged in the JDesktopIcon. + * + * @param e The MouseEvent. + */ + public void mouseDragged(MouseEvent e) + { + Rectangle b = desktopIcon.getBounds(); + + moveAndRepaint(desktopIcon, b.x + e.getX() - xOffset, + b.y + e.getY() - yOffset, b.width, b.height); + } + + /** + * This method is called when the mouse is moved in the JDesktopIcon. + * + * @param e The MouseEvent. + */ + public void mouseMoved(MouseEvent e) + { + // Nothing to do. + } + + /** + * This method is called when the mouse is pressed in the JDesktopIcon. + * + * @param e The MouseEvent. + */ + public void mousePressed(MouseEvent e) + { + xOffset = e.getX(); + yOffset = e.getY(); + pane = frame.getDesktopPane(); + if (pane != null) + pane.getDesktopManager().beginDraggingFrame(desktopIcon); + } + + /** + * This method is called when the mouse is released in the JDesktopIcon. + * + * @param e The MouseEvent. + */ + public void mouseReleased(MouseEvent e) + { + if (pane != null) + pane.getDesktopManager().endDraggingFrame(desktopIcon); + xOffset = 0; + yOffset = 0; + } + + /** + * This method moves and repaints the JDesktopIcon to the given bounds. + * + * @param f The JComponent to move and repaint. + * @param newX The new x coordinate. + * @param newY The new y coordinate. + * @param newWidth The new width. + * @param newHeight The new height. + */ + public void moveAndRepaint(JComponent f, int newX, int newY, int newWidth, + int newHeight) + { + if (pane != null) + pane.getDesktopManager().dragFrame(f, newX, newY); + else + desktopIcon.setBounds(newX, newY, newWidth, newHeight); + } + } + + /** + * This class acts as the border for the JDesktopIcon. + */ + private class DesktopIconBorder implements Border + { + /** The left inset value. */ + int left = 10; + + /** The top inset value. */ + int top = 4; + + /** The right inset value. */ + int right = top; + + /** The bottom inset value. */ + int bottom = top; + + /** + * This method returns the insets of the border. + * + * @param c The Component to find border insets for. + * + * @return The border insets. + */ + public Insets getBorderInsets(Component c) + { + return new Insets(top, left, bottom, right); + } + + /** + * This method returns whether the border is opaque. + * + * @return Whether the border is opaque. + */ + public boolean isBorderOpaque() + { + return true; + } + + /** + * This method paints the border. + * + * @param c The Component the border is in. + * @param g The Graphics object to paint with. + * @param x The x coordinate of the Component. + * @param y The y coordinate of the Component. + * @param width The width of the Component. + * @param height The height of the Component. + */ + public void paintBorder(Component c, Graphics g, int x, int y, int width, + int height) + { + g.translate(x, y); + Color saved = g.getColor(); + + g.setColor(Color.LIGHT_GRAY); + + g.fillRect(0, 0, left, height); + g.fillRect(0, 0, width, top); + g.fillRect(0, height - bottom, width, bottom); + g.fillRect(width - right, 0, right, height); + + g.setColor(Color.BLACK); + g.drawRect(0, 0, width - 1, height - 1); + + int fHeight = height / 4; + int hLeft = left / 2; + + g.setColor(Color.BLACK); + g.fillRect(hLeft, fHeight, 2, 2); + g.fillRect(hLeft, fHeight * 2, 2, 2); + g.fillRect(hLeft, fHeight * 3, 2, 2); + + g.setColor(saved); + g.translate(-x, -y); + } + } + + /** The static width and height of the iconSize. */ + private static final int iconSize = 16; + + /** + * This class represents the default frame icon when none + * is supplied by the JInternalFrame. + */ + static class InternalFrameDefaultMenuIcon implements Icon + { + /** + * This returns the icon height. + * + * @return The icon height. + */ + public int getIconHeight() + { + return iconSize; + } + + /** + * This returns the icon width. + * + * @return The icon width. + */ + public int getIconWidth() + { + return iconSize; + } + + /** + * This method paints the icon. + * + * @param c The Component this icon belongs to. + * @param g The Graphics object to paint with. + * @param x The x coordinate to paint at. + * @param y The y coordinate to paint at. + */ + public void paintIcon(Component c, Graphics g, int x, int y) + { + g.translate(x, y); + Color saved = g.getColor(); + + g.setColor(Color.BLUE); + g.fillRect(0, 0, iconSize, (int) ((double) iconSize / 3) + 1); + + g.setColor(Color.WHITE); + g.fillRect(0, (int) ((double) iconSize / 3), iconSize, iconSize * 5 / 6); + + g.setColor(Color.GRAY); + g.drawRect(0, 0, iconSize, iconSize); + + g.setColor(saved); + g.translate(-x, -y); + } + } + + /** The default JDesktopIcon width. */ + private static final int iconWidth = 160; + + /** The default JDesktopIcon height */ + private static final int iconHeight = 35; + + /** The JDesktopIcon this UI delegate represents. */ + protected JDesktopIcon desktopIcon; + + /** The JInternalFrame associated with the JDesktopIcon. */ + protected JInternalFrame frame; + + /** The MouseListener responsible for reacting to MouseEvents on the JDesktopIcon. */ + private transient MouseInputListener mouseHandler; + + /** The Button in the JDesktopIcon responsible for deiconifying it. + * This is package-private to avoid an accessor method. */ + transient BoundButton button; + + /** The PropertyChangeListener listening to the JDesktopIcon. */ + private transient PropertyChangeListener propertyHandler; + + /** The default icon used when no frame icon is given by the JInternalFrame. */ + static Icon defaultIcon = new InternalFrameDefaultMenuIcon(); + + /** + * This is a helper class that is used in JDesktopIcon and gives the Button a predetermined size. + */ + private class BoundButton extends JButton + { + /** + * Creates a new BoundButton object. + * + * @param title The title of the button. + */ + public BoundButton(String title) + { + super(title); + } + + /** + * This method returns a standard size (based on the defaults of the JDesktopIcon) and the insets. + * + * @return The preferred size of the JDesktopIcon. + */ + public Dimension getPreferredSize() + { + Insets insets = desktopIcon.getInsets(); + return new Dimension(iconWidth - insets.left - insets.right, + iconHeight - insets.top - insets.bottom); + } + + /** + * This method returns the minimum size of the button. + * + * @return The minimum size of the button. + */ + public Dimension getMinimumSize() + { + return getPreferredSize(); + } + + /** + * This method returns the maximum size of the button. + * + * @return The maximum size of the button. + */ + public Dimension getMaximumSize() + { + return getPreferredSize(); + } + } + + /** + * Creates a new BasicDesktopIconUI object. + */ + public BasicDesktopIconUI() + { + // Nothing to do here. + } + + /** + * This method creates a new BasicDesktopIconUI for the given JComponent. + * + * @param c The JComponent to create a UI for. + * + * @return A new BasicDesktopIconUI. + */ + public static ComponentUI createUI(JComponent c) + { + return new BasicDesktopIconUI(); + } + + /** + * This method installs the UI for the given JComponent. + * + * @param c The JComponent to install this UI for. + */ + public void installUI(JComponent c) + { + if (c instanceof JDesktopIcon) + { + desktopIcon = (JDesktopIcon) c; + desktopIcon.setLayout(new BorderLayout()); + frame = desktopIcon.getInternalFrame(); + + installDefaults(); + installComponents(); + installListeners(); + + desktopIcon.setOpaque(true); + } + } + + /** + * This method uninstalls the UI for the given JComponent. + * + * @param c The JComponent to uninstall this UI for. + */ + public void uninstallUI(JComponent c) + { + desktopIcon.setOpaque(false); + + uninstallListeners(); + uninstallComponents(); + uninstallDefaults(); + + frame = null; + desktopIcon.setLayout(null); + desktopIcon = null; + } + + /** + * This method installs the necessary sub components for the JDesktopIcon. + */ + protected void installComponents() + { + // Try to create a button based on what the frame's + // state is currently + button = new BoundButton(frame.getTitle()); + button.setHorizontalAlignment(SwingConstants.LEFT); + button.setHorizontalTextPosition(SwingConstants.TRAILING); + + Icon use = frame.getFrameIcon(); + if (use == null) + use = defaultIcon; + button.setIcon(use); + + desktopIcon.add(button, SwingConstants.CENTER); + } + + /** + * This method uninstalls the sub components for the JDesktopIcon. + */ + protected void uninstallComponents() + { + desktopIcon.remove(button); + + button = null; + } + + /** + * This method installs the listeners needed by this UI. + */ + protected void installListeners() + { + mouseHandler = createMouseInputListener(); + + desktopIcon.addMouseMotionListener(mouseHandler); + desktopIcon.addMouseListener(mouseHandler); + + propertyHandler = new PropertyChangeListener() + { + public void propertyChange(PropertyChangeEvent e) + { + if (e.getPropertyName().equals(JInternalFrame.TITLE_PROPERTY)) + button.setText(desktopIcon.getInternalFrame().getTitle()); + else if (e.getPropertyName().equals(JInternalFrame.FRAME_ICON_PROPERTY)) + { + Icon use = desktopIcon.getInternalFrame().getFrameIcon(); + if (use == null) + use = defaultIcon; + button.setIcon(use); + } + desktopIcon.revalidate(); + desktopIcon.repaint(); + } + }; + frame.addPropertyChangeListener(propertyHandler); + + button.addActionListener(new ActionListener() + { + public void actionPerformed(ActionEvent e) + { + deiconize(); + } + }); + } + + /** + * This method uninstalls the listeners needed by the UI. + */ + protected void uninstallListeners() + { + // button is nulled so no need to remove it. + + frame.removePropertyChangeListener(propertyHandler); + propertyHandler = null; + + desktopIcon.removeMouseMotionListener(mouseHandler); + desktopIcon.removeMouseListener(mouseHandler); + } + + /** + * This method installs the defaults for the JDesktopIcon. + */ + protected void installDefaults() + { + // FIXME: Move border to defaults. + desktopIcon.setBorder(new DesktopIconBorder()); + } + + /** + * This method uninstalls the defaults for the JDesktopIcon. + */ + protected void uninstallDefaults() + { + desktopIcon.setBorder(null); + } + + /** + * This method creates a new MouseInputListener for the JDesktopIcon. + * + * @return A new MouseInputListener. + */ + protected MouseInputListener createMouseInputListener() + { + return new MouseInputHandler(); + } + + /** + * This method returns the preferred size for the given JComponent. + * + * @param c The JComponent to find a preferred size for. + * + * @return The preferred size. + */ + public Dimension getPreferredSize(JComponent c) + { + return new Dimension(iconWidth, iconHeight); + } + + /** + * This method returns the minimum size for the given JComponent. + * + * @param c The JComponent to find a minimum size for. + * + * @return The minimum size. + */ + public Dimension getMinimumSize(JComponent c) + { + return getPreferredSize(c); + } + + /** + * This method returns the maximum size for the given JComponent. + * + * @param c The JComponent to find a maximum size for. + * + * @return The maximum size. + */ + public Dimension getMaximumSize(JComponent c) + { + return getPreferredSize(c); + } + + /** + * This method returns the insets of the given JComponent. + * + * @param c The JComponent to find insets for. + * + * @return The insets of the given JComponent. + */ + public Insets getInsets(JComponent c) + { + return c.getInsets(); + } + + /** + * This method deiconizes the JInternalFrame associated with the JDesktopIcon. + */ + public void deiconize() + { + try + { + frame.setIcon(false); + } + catch (PropertyVetoException pve) + { + // We do nothing if the attempt has been vetoed. + } + } +} |