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/*******************************************************************************
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.graphics;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This tab demonstrates the use of paths. It allows the user to see the
* differences between filling, drawing and closing paths.
*/
public class PathTab extends GraphicsTab {
Button colorButton, fillButton, drawButton, closeButton;
GraphicsBackground fillColor;
Menu menu;
public PathTab(GraphicsExample example) {
super(example);
}
public String getCategory() {
return GraphicsExample.getResourceString("Path"); //$NON-NLS-1$
}
public String getText() {
return GraphicsExample.getResourceString("PathOper"); //$NON-NLS-1$
}
public String getDescription() {
return GraphicsExample.getResourceString("PathOperDescription"); //$NON-NLS-1$
}
public void dispose() {
if (menu != null) {
menu.dispose();
menu = null;
}
}
public void createControlPanel(Composite parent) {
Composite comp;
// create draw button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
drawButton = new Button(comp, SWT.TOGGLE);
drawButton.setText(GraphicsExample.getResourceString("DrawPath")); //$NON-NLS-1$
drawButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
example.redraw();
}
});
drawButton.setSelection(true);
// create fill button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
fillButton = new Button(comp, SWT.TOGGLE);
fillButton.setText(GraphicsExample.getResourceString("FillPath")); //$NON-NLS-1$
fillButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
example.redraw();
}
});
// create close button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
closeButton = new Button(comp, SWT.TOGGLE);
closeButton.setText(GraphicsExample.getResourceString("ClosePath")); //$NON-NLS-1$
closeButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
example.redraw();
}
});
// create color button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
ColorMenu cm = new ColorMenu();
cm.setPatternItems(example.checkAdvancedGraphics());
menu = cm.createMenu(parent.getParent(), new ColorListener() {
public void setColor(GraphicsBackground gb) {
fillColor = gb;
colorButton.setImage(gb.getThumbNail());
example.redraw();
}
});
// initialize the foreground to the 5th item in the menu (green)
fillColor = (GraphicsBackground)menu.getItem(3).getData();
// color button
colorButton = new Button(comp, SWT.PUSH);
colorButton.setText(GraphicsExample.getResourceString("FillColor")); //$NON-NLS-1$
colorButton.setImage(fillColor.getThumbNail());
colorButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
final Button button = (Button) event.widget;
final Composite parent = button.getParent();
Rectangle bounds = button.getBounds();
Point point = parent.toDisplay(new Point(bounds.x, bounds.y));
menu.setLocation(point.x, point.y + bounds.height);
menu.setVisible(true);
}
});
}
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
Pattern pattern = null;
if (fillColor.getBgColor1() != null) {
gc.setBackground(fillColor.getBgColor1());
} else if (fillColor.getBgImage() != null) {
pattern = new Pattern(device, fillColor.getBgImage());
gc.setBackgroundPattern(pattern);
}
gc.setLineWidth(5);
gc.setForeground(device.getSystemColor(SWT.COLOR_BLACK));
// arc
Path path = new Path(device);
path.addArc((width-250)/2, (height-400)/2, 500, 400, 90, 180);
if (closeButton.getSelection()) path.close();
if (fillButton.getSelection()) gc.fillPath(path);
if (drawButton.getSelection()) gc.drawPath(path);
path.dispose();
// shape on left
Transform transform = new Transform(device);
transform.translate((width-250)/4, height/2-150);
gc.setTransform(transform);
transform.dispose();
path = new Path(device);
path.cubicTo(-150, 100, 150, 200, 0, 300);
if (closeButton.getSelection()) path.close();
if (fillButton.getSelection()) gc.fillPath(path);
if (drawButton.getSelection()) gc.drawPath(path);
path.dispose();
gc.setTransform(null);
// shape on right
path = new Path(device);
path.moveTo(3*(width-250)/4 - 25 + 250, height/2);
path.lineTo(3*(width-250)/4 + 50 + 250, height/2 - 200);
path.lineTo(3*(width-250)/4 + 50 + 250, height/2 + 50);
path.lineTo(3*(width-250)/4 - 25 + 250, height/2 + 150);
path.lineTo(3*(width-250)/4 + 25 + 250, height/2 + 50);
if (closeButton.getSelection()) path.close();
if (fillButton.getSelection()) gc.fillPath(path);
if (drawButton.getSelection()) gc.drawPath(path);
path.dispose();
if (pattern != null) pattern.dispose();
}
}
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