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/*
* Copyright (c) 2009 Albert Kurucz.
*
* This file, SortButtonRenderer.java is part of JTStand.
*
* JTStand is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JTStand 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GTStand. If not, see
* This class (and also BevelArrowIcon) is adapted from original code by Nobuo Tamemasa (version
* 1.0, 26-Feb-1999) posted on www.codeguru.com.
*
* @author David Gilbert
*/
public class SortButtonRenderer implements TableCellRenderer {
/**
* Useful constant indicating NO sorting.
*/
public static final int NONE = 0;
/**
* Useful constant indicating ASCENDING (that is, arrow pointing down) sorting in the table.
*/
public static final int DOWN = 1;
/**
* Useful constant indicating DESCENDING (that is, arrow pointing up) sorting in the table.
*/
public static final int UP = 2;
/**
* The current pressed column (-1 for no column).
*/
private int pressedColumn = -1;
/**
* The three buttons that are used to render the table header cells.
*/
private JButton normalButton;
/**
* The three buttons that are used to render the table header cells.
*/
private JButton ascendingButton;
/**
* The three buttons that are used to render the table header cells.
*/
private JButton descendingButton;
/**
* Used to allow the class to work out whether to use the buttuns
* or labels. Labels are required when using the aqua look and feel cos the
* buttons won't fit.
*/
private boolean useLabels;
/**
* The normal label (only used with MacOSX).
*/
private JLabel normalLabel;
/**
* The ascending label (only used with MacOSX).
*/
private JLabel ascendingLabel;
/**
* The descending label (only used with MacOSX).
*/
private JLabel descendingLabel;
/**
* Creates a new button renderer.
*/
public SortButtonRenderer() {
this.pressedColumn = -1;
this.useLabels = UIManager.getLookAndFeel().getID().equals("Aqua");
final Border border = UIManager.getBorder("TableHeader.cellBorder");
if (this.useLabels) {
this.normalLabel = new JLabel();
this.normalLabel.setHorizontalAlignment(SwingConstants.LEADING);
this.ascendingLabel = new JLabel();
this.ascendingLabel.setHorizontalAlignment(SwingConstants.LEADING);
this.ascendingLabel.setHorizontalTextPosition(SwingConstants.LEFT);
this.ascendingLabel.setIcon(new BevelArrowIcon(BevelArrowIcon.DOWN, false, false));
this.descendingLabel = new JLabel();
this.descendingLabel.setHorizontalAlignment(SwingConstants.LEADING);
this.descendingLabel.setHorizontalTextPosition(SwingConstants.LEFT);
this.descendingLabel.setIcon(new BevelArrowIcon(BevelArrowIcon.UP, false, false));
this.normalLabel.setBorder(border);
this.ascendingLabel.setBorder(border);
this.descendingLabel.setBorder(border);
}
else {
this.normalButton = new JButton();
this.normalButton.setMargin(new Insets(0, 0, 0, 0));
this.normalButton.setHorizontalAlignment(SwingConstants.LEADING);
this.ascendingButton = new JButton();
this.ascendingButton.setMargin(new Insets(0, 0, 0, 0));
this.ascendingButton.setHorizontalAlignment(SwingConstants.LEADING);
this.ascendingButton.setHorizontalTextPosition(SwingConstants.LEFT);
this.ascendingButton.setIcon(new BevelArrowIcon(BevelArrowIcon.DOWN, false, false));
this.ascendingButton.setPressedIcon(new BevelArrowIcon(BevelArrowIcon.DOWN, false, true));
this.descendingButton = new JButton();
this.descendingButton.setMargin(new Insets(0, 0, 0, 0));
this.descendingButton.setHorizontalAlignment(SwingConstants.LEADING);
this.descendingButton.setHorizontalTextPosition(SwingConstants.LEFT);
this.descendingButton.setIcon(new BevelArrowIcon(BevelArrowIcon.UP, false, false));
this.descendingButton.setPressedIcon(new BevelArrowIcon(BevelArrowIcon.UP, false, true));
this.normalButton.setBorder(border);
this.ascendingButton.setBorder(border);
this.descendingButton.setBorder(border);
}
}
/**
* Returns the renderer component.
*
* @param table the table.
* @param value the value.
* @param isSelected selected?
* @param hasFocus focussed?
* @param row the row.
* @param column the column.
* @return the renderer.
*/
public Component getTableCellRendererComponent(final JTable table,
final Object value,
final boolean isSelected,
final boolean hasFocus,
final int row, final int column) {
if (table == null) {
throw new NullPointerException("Table must not be null.");
}
final JComponent component;
final SortableTableModel model = (SortableTableModel) table.getModel();
final int cc = table.convertColumnIndexToModel(column);
final boolean isSorting = (model.getSortingColumn() == cc);
final boolean isAscending = model.isAscending();
final JTableHeader header = table.getTableHeader();
final boolean isPressed = (cc == this.pressedColumn);
if (this.useLabels) {
final JLabel label = getRendererLabel(isSorting, isAscending);
label.setText((value == null) ? "" : value.toString());
component = label;
}
else {
final JButton button = getRendererButton(isSorting, isAscending);
button.setText((value == null) ? "" : value.toString());
button.getModel().setPressed(isPressed);
button.getModel().setArmed(isPressed);
component = button;
}
if (header != null) {
component.setForeground(header.getForeground());
component.setBackground(header.getBackground());
component.setFont(header.getFont());
}
return component;
}
/**
* Returns the correct button component.
*
* @param isSorting whether the render component represents the sort column.
* @param isAscending whether the model is ascending.
* @return either the ascending, descending or normal button.
*/
private JButton getRendererButton(final boolean isSorting, final boolean isAscending) {
if (isSorting) {
if (isAscending) {
return this.ascendingButton;
}
else {
return this.descendingButton;
}
}
else {
return this.normalButton;
}
}
/**
* Returns the correct label component.
*
* @param isSorting whether the render component represents the sort column.
* @param isAscending whether the model is ascending.
* @return either the ascending, descending or normal label.
*/
private JLabel getRendererLabel(final boolean isSorting, final boolean isAscending) {
if (isSorting) {
if (isAscending) {
return this.ascendingLabel;
}
else {
return this.descendingLabel;
}
}
else {
return this.normalLabel;
}
}
/**
* Sets the pressed column.
*
* @param column the column.
*/
public void setPressedColumn(final int column) {
this.pressedColumn = column;
}
}