| /******************************************************************************* |
| * 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(); |
| } |
| } |
| |
| |