synthtableui.java

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

/*
 * @(#)SynthTableUI.java	1.28 08/06/16
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing.plaf.synth;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.text.DateFormat;
import java.text.Format;
import java.text.NumberFormat;
import java.util.Date;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.LookAndFeel;
import javax.swing.border.Border;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicTableUI;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

import sun.swing.plaf.synth.SynthUI;

/**
 * SynthTableUI implementation
 *
 * @version 1.28, 06/16/08
 * @author Philip Milne
 */
class SynthTableUI extends BasicTableUI implements SynthUI,
        PropertyChangeListener {
//
// Instance Variables
//

    private SynthStyle style;

    private boolean useTableColors;
    private boolean useUIBorder;
    private Color alternateColor; //the background color to use for cells for alternate cells

    // TableCellRenderer installed on the JTable at the time we're installed,
    // cached so that we can reinstall them at uninstallUI time.
    private TableCellRenderer dateRenderer;
    private TableCellRenderer numberRenderer;
    private TableCellRenderer doubleRender;
    private TableCellRenderer floatRenderer;
    private TableCellRenderer iconRenderer;
    private TableCellRenderer imageIconRenderer;
    private TableCellRenderer booleanRenderer;
    private TableCellRenderer objectRenderer;

//
//  The installation/uninstall procedures and support
//

    public static ComponentUI createUI(JComponent c) {
        return new SynthTableUI();
    }

    /**
     * Initialize JTable properties, e.g. font, foreground, and background.
     * The font, foreground, and background properties are only set if their
     * current value is either null or a UIResource, other properties are set
     * if the current value is null.
     *
     * @see #installUI
     */
    protected void installDefaults() {
        dateRenderer = installRendererIfPossible(Date.class, null);
        numberRenderer = installRendererIfPossible(Number.class, null);
        doubleRender = installRendererIfPossible(Double.class, null);
        floatRenderer = installRendererIfPossible(Float.class, null);
        iconRenderer = installRendererIfPossible(Icon.class, null);
        imageIconRenderer = installRendererIfPossible(ImageIcon.class, null);
        booleanRenderer = installRendererIfPossible(Boolean.class,
                                 new SynthBooleanTableCellRenderer());
        objectRenderer = installRendererIfPossible(Object.class,
                                        new SynthTableCellRenderer());
        updateStyle(table);
    }

    private TableCellRenderer installRendererIfPossible(Class objectClass,
                                     TableCellRenderer renderer) {
        TableCellRenderer currentRenderer = table.getDefaultRenderer(
                                 objectClass);
        if (currentRenderer instanceof UIResource) {
            table.setDefaultRenderer(objectClass, renderer);
        }
        return currentRenderer;
    }

    private void updateStyle(JTable c) {
        SynthContext context = getContext(c, ENABLED);
        SynthStyle oldStyle = style;
        style = SynthLookAndFeel.updateStyle(context, this);
        if (style != oldStyle) {
            context.setComponentState(ENABLED | SELECTED);

            Color sbg = table.getSelectionBackground();
            if (sbg == null || sbg instanceof UIResource) {
                table.setSelectionBackground(style.getColor(
                                        context, ColorType.TEXT_BACKGROUND));
            }

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

            context.setComponentState(ENABLED);

            Color gridColor = table.getGridColor();
            if (gridColor == null || gridColor instanceof UIResource) {
                gridColor = (Color)style.get(context, "Table.gridColor");
                if (gridColor == null) {
                    gridColor = style.getColor(context, ColorType.FOREGROUND);
                }
                table.setGridColor(gridColor);
            }

            useTableColors = style.getBoolean(context,
                                  "Table.rendererUseTableColors", true);
            useUIBorder = style.getBoolean(context,
                                  "Table.rendererUseUIBorder", true);

            Object rowHeight = style.get(context, "Table.rowHeight");
            if (rowHeight != null) {
                LookAndFeel.installProperty(table, "rowHeight", rowHeight);
            }
            boolean showGrid = style.getBoolean(context, "Table.showGrid", true);
            if (!showGrid) {
                table.setShowGrid(false);
            }
            Dimension d = table.getIntercellSpacing();
//            if (d == null || d instanceof UIResource) {
            if (d != null) {
                d = (Dimension)style.get(context, "Table.intercellSpacing");
            }
            alternateColor = (Color)style.get(context, "Table.alternateRowColor");
            if (d != null) {
                table.setIntercellSpacing(d);
            }


            if (oldStyle != null) {
                uninstallKeyboardActions();
                installKeyboardActions();
            }
        }
        context.dispose();
    }

    /**
     * Attaches listeners to the JTable.
     */
    protected void installListeners() {
        super.installListeners();
        table.addPropertyChangeListener(this);
    }

    protected void uninstallDefaults() {
        table.setDefaultRenderer(Date.class, dateRenderer);
        table.setDefaultRenderer(Number.class, numberRenderer);
        table.setDefaultRenderer(Double.class, doubleRender);
        table.setDefaultRenderer(Float.class, floatRenderer);
        table.setDefaultRenderer(Icon.class, iconRenderer);
        table.setDefaultRenderer(ImageIcon.class, imageIconRenderer);
        table.setDefaultRenderer(Boolean.class, booleanRenderer);
        table.setDefaultRenderer(Object.class, objectRenderer);

	if (table.getTransferHandler() instanceof UIResource) {
	    table.setTransferHandler(null);
	}
        SynthContext context = getContext(table, ENABLED);
        style.uninstallDefaults(context);
        context.dispose();
        style = null;
    }

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

    //
    // SynthUI
    //
    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);
    }

//
//  Paint methods and support
//

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

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

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

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

        paint(context, g);
        context.dispose();
    }

    protected void paint(SynthContext context, Graphics g) {
        Rectangle clip = g.getClipBounds();

        Rectangle bounds = table.getBounds();
        // account for the fact that the graphics has already been translated
        // into the table's bounds
        bounds.x = bounds.y = 0;

        if (table.getRowCount() <= 0 || table.getColumnCount() <= 0 ||
                // this check prevents us from painting the entire table
                // when the clip doesn't intersect our bounds at all
                !bounds.intersects(clip)) {

            paintDropLines(context, g);
	    return;
	}

        boolean ltr = table.getComponentOrientation().isLeftToRight();

        Point upperLeft = clip.getLocation();
        if (!ltr) {
            upperLeft.x++;
        }

        Point lowerRight = new Point(clip.x + clip.width - (ltr ? 1 : 0),
                                     clip.y + clip.height);

        int rMin = table.rowAtPoint(upperLeft);
        int rMax = table.rowAtPoint(lowerRight);
        // This should never happen (as long as our bounds intersect the clip,
        // which is why we bail above if that is the case).
        if (rMin == -1) {
	    rMin = 0;
        }
        // If the table does not have enough rows to fill the view we'll get -1.
        // (We could also get -1 if our bounds don't intersect the clip,
        // which is why we bail above if that is the case).
        // Replace this with the index of the last row.
        if (rMax == -1) {
	    rMax = table.getRowCount()-1;
        }

        int cMin = table.columnAtPoint(ltr ? upperLeft : lowerRight); 
        int cMax = table.columnAtPoint(ltr ? lowerRight : upperLeft);        
        // This should never happen.
        if (cMin == -1) {
	    cMin = 0;
        }
	// If the table does not have enough columns to fill the view we'll get -1.
        // Replace this with the index of the last column.
        if (cMax == -1) {
	    cMax = table.getColumnCount()-1;
        }

        // Paint the grid.
        paintGrid(context, g, rMin, rMax, cMin, cMax);

        // Paint the cells.
	paintCells(context, g, rMin, rMax, cMin, cMax);

        paintDropLines(context, g);
    }

    private void paintDropLines(SynthContext context, Graphics g) {
        JTable.DropLocation loc = table.getDropLocation();
        if (loc == null) {
            return;
        }

        Color color = (Color)style.get(context, "Table.dropLineColor");
        Color shortColor = (Color)style.get(context, "Table.dropLineShortColor");
        if (color == null && shortColor == null) {
            return;
        }

        Rectangle rect;

        rect = getHDropLineRect(loc);
        if (rect != null) {
            int x = rect.x;
            int w = rect.width;
            if (color != null) {
                extendRect(rect, true);
                g.setColor(color);
                g.fillRect(rect.x, rect.y, rect.width, rect.height);
            }
            if (!loc.isInsertColumn() && shortColor != null) {
                g.setColor(shortColor);
                g.fillRect(x, rect.y, w, rect.height);
            }
        }

        rect = getVDropLineRect(loc);
        if (rect != null) {
            int y = rect.y;
            int h = rect.height;
            if (color != null) {
                extendRect(rect, false);
                g.setColor(color);
                g.fillRect(rect.x, rect.y, rect.width, rect.height);
            }
            if (!loc.isInsertRow() && shortColor != null) {
                g.setColor(shortColor);
                g.fillRect(rect.x, y, rect.width, h);
            }
        }
    }

    private Rectangle getHDropLineRect(JTable.DropLocation loc) {
        if (!loc.isInsertRow()) {
            return null;
        }

        int row = loc.getRow();
        int col = loc.getColumn();
        if (col >= table.getColumnCount()) {
            col--;
        }

        Rectangle rect = table.getCellRect(row, col, true);

        if (row >= table.getRowCount()) {
            row--;
            Rectangle prevRect = table.getCellRect(row, col, true);
            rect.y = prevRect.y + prevRect.height;
        }

        if (rect.y == 0) {
            rect.y = -1;
        } else {
            rect.y -= 2;
        }

        rect.height = 3;