Source Code Cross Referenced for SortedColumnHeaderRenderer.java in  » Swing-Library » abeille-forms-designer » com » jeta » swingbuilder » gui » components » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Swing Library » abeille forms designer » com.jeta.swingbuilder.gui.components 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (C) 2005 Jeff Tassin
003:         *
004:         * This library is free software; you can redistribute it and/or
005:         * modify it under the terms of the GNU Lesser General Public
006:         * License as published by the Free Software Foundation; either
007:         * version 2.1 of the License, or (at your option) any later version.
008:         *
009:         * This library is distributed in the hope that it will be useful,
010:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
011:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
012:         * Lesser General Public License for more details.
013:         *
014:         * You should have received a copy of the GNU Lesser General Public
015:         * License along with this library; if not, write to the Free Software
016:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
017:         */
018:
019:        package com.jeta.swingbuilder.gui.components;
020:
021:        import java.awt.Component;
022:
023:        import javax.swing.ImageIcon;
024:        import javax.swing.JLabel;
025:        import javax.swing.JTable;
026:        import javax.swing.table.AbstractTableModel;
027:        import javax.swing.table.JTableHeader;
028:        import javax.swing.table.TableCellRenderer;
029:
030:        import com.jeta.swingbuilder.gui.utils.FormDesignerUtils;
031:        import com.jeta.swingbuilder.resources.Icons;
032:
033:        /**
034:         * The main purpose of this class is to display an icon in the header cell that
035:         * shows how the column is currently sorted. There can be one of three modes for
036:         * this: ASCENDING - show up arrow DESCENDING - show down arrow NONE - no image
037:         * 
038:         * @author Jeff Tassin
039:         */
040:
041:        class SortedColumnHeaderRenderer extends JLabel implements 
042:                TableCellRenderer {
043:            static final ImageIcon m_upimage;
044:            static final ImageIcon m_downimage;
045:            static final ImageIcon m_emptyheaderimage;
046:
047:            private SortMode m_sortmode; // the current sorting for a given column
048:
049:            static {
050:                m_upimage = FormDesignerUtils.loadImage(Icons.UP_16);
051:                m_downimage = FormDesignerUtils.loadImage(Icons.DOWN_16);
052:                m_emptyheaderimage = FormDesignerUtils
053:                        .loadImage("emptytableheader16.gif");
054:
055:            }
056:
057:            public SortedColumnHeaderRenderer() {
058:                super ();
059:                this .setHorizontalAlignment(JLabel.CENTER);
060:            }
061:
062:            /**
063:             * Gets the sort mode for this renderer. Each column has a separate
064:             * renderer. When the user sorts a given column, we put an icon in the
065:             * header that shows whether the column is ascending, descending, or natural
066:             * ordering.
067:             * 
068:             * @return mode the sort mode to set. We get the sort mode from the SortMode
069:             *         class: ASCENDING, DESCENDING, or NONE
070:             */
071:            public SortMode getSortMode() {
072:                return m_sortmode;
073:            }
074:
075:            /**
076:             * TableCellRenderer implementation
077:             */
078:            public Component getTableCellRendererComponent(JTable table,
079:                    Object value, boolean isSelected, boolean hasFocus,
080:                    int row, int column) {
081:                // Try to set default fore- and background colors
082:                if (table != null) {
083:                    JTableHeader header = table.getTableHeader();
084:                    if (header != null) {
085:                        setForeground(header.getForeground());
086:                        setBackground(header.getBackground());
087:                        setFont(header.getFont());
088:                        AbstractTableModel model = (AbstractTableModel) table
089:                                .getModel();
090:
091:                        column = table.convertColumnIndexToModel(column);
092:                        setText(model.getColumnName(column));
093:                        // set normal border
094:                        setBorder(javax.swing.UIManager
095:                                .getBorder("TableHeader.cellBorder"));
096:
097:                        if (m_sortmode == SortMode.ASCENDING)
098:                            setIcon(m_upimage);
099:                        else if (m_sortmode == SortMode.DESCENDING)
100:                            setIcon(m_downimage);
101:                        else
102:                            // if NONE
103:                            setIcon(m_emptyheaderimage);
104:                    }
105:                }
106:                return this ;
107:            }
108:
109:            /**
110:             * Sets the sort mode for this renderer. Each column has a separate
111:             * renderer. When the user sorts a given column, we put an icon in the
112:             * header that shows whether the column is ascending, descending, or natural
113:             * ordering.
114:             * 
115:             * @param mode
116:             *            the sort mode to set. We get the sort mode from the SortMode
117:             *            class: ASCENDING, DESCENDING, or NONE
118:             */
119:            public void setSortMode(SortMode mode) {
120:                m_sortmode = mode;
121:            }
122:        }
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