synthlistui.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

/*
 * @(#)SynthListUI.java	1.13 06/03/16
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing.plaf.synth;

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.text.Position;

import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.*;

import java.util.ArrayList;
import java.util.TooManyListenersException;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import sun.swing.plaf.synth.SynthUI;

/**
 * Synth's ListUI.
 *
 * @version 1.13, 03/16/06
 * @author Scott Violet
 */
class SynthListUI extends BasicListUI implements PropertyChangeListener,
                               SynthUI {
    private SynthStyle style;
    private boolean useListColors;
    private boolean useUIBorder;

    public static ComponentUI createUI(JComponent list) {
        return new SynthListUI();
    }

    public void update(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);
        context.getPainter().paintListBackground(context,
                          g, 0, 0, c.getWidth(), c.getHeight());
        context.dispose();
        paint(g, c);
    }

    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintListBorder(context, g, x, y, w, h);
    }

    protected void installListeners() {
        super.installListeners();
        list.addPropertyChangeListener(this);
    }

    public void propertyChange(PropertyChangeEvent e) {
        if (SynthLookAndFeel.shouldUpdateStyle(e)) {
            updateStyle((JList)e.getSource());
        }
    }

    protected void uninstallListeners() {
        super.uninstallListeners();
        list.removePropertyChangeListener(this);
    }

    protected void installDefaults() {
        if (list.getCellRenderer() == null ||
                 (list.getCellRenderer() instanceof UIResource)) {
            list.setCellRenderer(new SynthListCellRenderer());
        }
        updateStyle(list);
    }

    private void updateStyle(JComponent c) {
        SynthContext context = getContext(list, ENABLED);
        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {
            context.setComponentState(SELECTED);
            Color sbg = list.getSelectionBackground();
            if (sbg == null || sbg instanceof UIResource) {
                list.setSelectionBackground(style.getColor(
                                 context, ColorType.TEXT_BACKGROUND));
            }

            Color sfg = list.getSelectionForeground();
            if (sfg == null || sfg instanceof UIResource) {
                list.setSelectionForeground(style.getColor(
                                 context, ColorType.TEXT_FOREGROUND));
            }

            useListColors = style.getBoolean(context,
                                  "List.rendererUseListColors", true);
            useUIBorder = style.getBoolean(context,
                                  "List.rendererUseUIBorder", true);

            int height = style.getInt(context, "List.cellHeight", -1);
            if (height != -1) {
                list.setFixedCellHeight(height);
            }
            if (oldStyle != null) {
                uninstallKeyboardActions();
                installKeyboardActions();
            }
        }
        context.dispose();
    }

    protected void uninstallDefaults() {
        super.uninstallDefaults();

        SynthContext context = getContext(list, ENABLED);

        style.uninstallDefaults(context);
        context.dispose();
        style = null;
    }

    public SynthContext getContext(JComponent c) {
        return getContext(c, getComponentState(c));
    }

    private SynthContext getContext(JComponent c, int state) {
        return SynthContext.getContext(SynthContext.class, c,
                    SynthLookAndFeel.getRegion(c), style, state);
    }

    private Region getRegion(JComponent c) {
        return SynthLookAndFeel.getRegion(c);
    }

    private int getComponentState(JComponent c) {
        return SynthLookAndFeel.getComponentState(c);
    }


    private class SynthListCellRenderer extends DefaultListCellRenderer.UIResource {
        public String getName() {
            return "List.cellRenderer";
        }

        public void setBorder(Border b) {
            if (useUIBorder || b instanceof SynthBorder) {
                super.setBorder(b);
            }
        }

        public Component getListCellRendererComponent(JList list, Object value,
                  int index, boolean isSelected, boolean cellHasFocus) {
            if (!useListColors && (isSelected || cellHasFocus)) {
                SynthLookAndFeel.setSelectedUI((SynthLabelUI)SynthLookAndFeel.
                             getUIOfType(getUI(), SynthLabelUI.class),
                                   isSelected, cellHasFocus, list.isEnabled(), false);
            }
            else {
                SynthLookAndFeel.resetSelectedUI();
            }
            
            super.getListCellRendererComponent(list, value, index,
                                               isSelected, cellHasFocus);
            return this;
        }

        public void paint(Graphics g) {
            super.paint(g);
            SynthLookAndFeel.resetSelectedUI();
        }
    }
}