/*******************************************************************************
* Copyright (c) 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* chris.gross@us.ibm.com - initial API and implementation
* Chuck.Mastrandrea@sas.com - wordwrapping in bug 222280
* smcduff@hotmail.com - wordwrapping in bug 222280
*******************************************************************************/
package org.eclipse.nebula.widgets.grid.internal;
import org.eclipse.nebula.widgets.grid.AbstractRenderer;
import org.eclipse.nebula.widgets.grid.GridColumn;
import org.eclipse.nebula.widgets.grid.GridItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.TextLayout;
/**
* The row header renderer.
*
* @author chris.gross@us.ibm.com
* @since 2.0.0
*/
public class DefaultRowHeaderRenderer extends AbstractRenderer
{
int leftMargin = 6;
int rightMargin = 8;
int topMargin = 3;
int bottomMargin = 3;
private TextLayout textLayout;
/**
* {@inheritDoc}
*/
public void paint(GC gc, Object value)
{
GridItem item = (GridItem) value;
String text = getHeaderText(item);
gc.setFont(getDisplay().getSystemFont());
Color background = getHeaderBackground(item);
if( background == null ) {
background = getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
}
gc.setBackground(background);
if (isSelected() && item.getParent().getCellSelectionEnabled())
{
gc.setBackground(item.getParent().getCellHeaderSelectionBackground());
}
gc.fillRectangle(getBounds().x, getBounds().y, getBounds().width, getBounds().height + 1);
if (!item.getParent().getCellSelectionEnabled())
{
if (isSelected())
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW));
}
else
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));
}
gc.drawLine(getBounds().x, getBounds().y, getBounds().x + getBounds().width - 1,
getBounds().y);
gc.drawLine(getBounds().x, getBounds().y, getBounds().x, getBounds().y + getBounds().height
- 1);
if (!isSelected())
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));
gc.drawLine(getBounds().x + 1, getBounds().y + 1,
getBounds().x + getBounds().width - 2, getBounds().y + 1);
gc.drawLine(getBounds().x + 1, getBounds().y + 1, getBounds().x + 1,
getBounds().y + getBounds().height - 2);
}
if (isSelected())
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW));
}
else
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_DARK_SHADOW));
}
gc.drawLine(getBounds().x + getBounds().width - 1, getBounds().y, getBounds().x
+ getBounds().width - 1,
getBounds().y + getBounds().height - 1);
gc.drawLine(getBounds().x, getBounds().y + getBounds().height - 1, getBounds().x
+ getBounds().width - 1,
getBounds().y + getBounds().height - 1);
if (!isSelected())
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW));
gc.drawLine(getBounds().x + getBounds().width - 2, getBounds().y + 1,
getBounds().x + getBounds().width - 2, getBounds().y + getBounds().height
- 2);
gc.drawLine(getBounds().x + 1, getBounds().y + getBounds().height - 2,
getBounds().x + getBounds().width - 2, getBounds().y + getBounds().height
- 2);
}
}
else
{
gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_DARK_SHADOW));
gc.drawLine(getBounds().x + getBounds().width - 1, getBounds().y, getBounds().x
+ getBounds().width - 1,
getBounds().y + getBounds().height - 1);
gc.drawLine(getBounds().x, getBounds().y + getBounds().height - 1, getBounds().x
+ getBounds().width - 1,
getBounds().y + getBounds().height - 1);
}
int x = leftMargin;
Image image = getHeaderImage(item);
if( image != null ) {
if( isSelected() && !item.getParent().getCellSelectionEnabled() ) {
gc.drawImage(image, x + 1, getBounds().y + 1 + (getBounds().height - image.getBounds().height)/2);
x += 1;
} else {
gc.drawImage(image, x, getBounds().y + (getBounds().height - image.getBounds().height)/2);
}
x += image.getBounds().width + 5;
}
int width = getBounds().width - x;
width -= rightMargin;
Color foreground = getHeaderForeground(item);
if( foreground == null ) {
foreground = getDisplay().getSystemColor(SWT.COLOR_WIDGET_FOREGROUND);
}
gc.setForeground(foreground);
int y = getBounds().y;
int selectionOffset = 0;
if (isSelected() && !item.getParent().getCellSelectionEnabled())
{
selectionOffset = 1;
}
if (!item.getParent().isWordWrapHeader())
{
y += (getBounds().height - gc.stringExtent(text).y) / 2;
gc.drawString(TextUtils.getShortString(gc, text, width), getBounds().x + x + selectionOffset, y + selectionOffset, true);
}
else
{
getTextLayout(gc, item);
textLayout.setWidth(width < 1 ? 1 : width);
textLayout.setText(text);
if (item.getParent().isAutoHeight())
{
// Look through all columns to get the max height needed for this item
int columnCount = item.getParent().getColumnCount();
int maxHeight = textLayout.getBounds().height + topMargin + bottomMargin;
for (int i=0; i<columnCount; i++)
{
GridColumn column = item.getParent().getColumn(i);
if (column.getWordWrap())
{
int height = column.getCellRenderer().computeSize(gc, column.getWidth(), SWT.DEFAULT, item).y;
maxHeight = Math.max(maxHeight, height);
}
}
if (maxHeight != item.getHeight())
{
item.setHeight(maxHeight);
}
}
textLayout.draw(gc, getBounds().x + x + selectionOffset, y + selectionOffset);
}
}
/**
* {@inheritDoc}
*/
public Point computeSize(GC gc, int wHint, int hHint, Object value)
{
GridItem item = (GridItem) value;
String text = getHeaderText(item);
Image image = getHeaderImage(item);
int x = 0;
x += leftMargin;
if( image != null ) {
x += image.getBounds().width + 5;
}
x += gc.stringExtent(text).x + rightMargin;
int y = 0;
y += topMargin;
if( image != null ) {
y += Math.max(gc.getFontMetrics().getHeight(),image.getBounds().height);
} else {
y += gc.getFontMetrics().getHeight();
}
y += bottomMargin;
return new Point(x, y);
}
private Image getHeaderImage(GridItem item) {
return item.getHeaderImage();
}
private String getHeaderText(GridItem item)
{
String text = item.getHeaderText();
if (text == null)
{
text = (item.getParent().indexOf(item) + 1) + "";
}
return text;
}
private Color getHeaderBackground(GridItem item) {
return item.getHeaderBackground();
}
private Color getHeaderForeground(GridItem item) {
return item.getHeaderForeground();
}
private void getTextLayout(GC gc, GridItem gridItem)
{
if (textLayout == null)
{
textLayout = new TextLayout(gc.getDevice());
textLayout.setFont(gc.getFont());
gridItem.getParent().addDisposeListener(new DisposeListener()
{
public void widgetDisposed(DisposeEvent e)
{
textLayout.dispose();
}
});
}
}
}