| /******************************************************************************* |
| * 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 various line caps applicable to a line. |
| */ |
| public class LineCapTab extends GraphicsTab { |
| |
| Button colorButton; |
| GraphicsBackground foreground; |
| Menu menu; |
| |
| public LineCapTab(GraphicsExample example) { |
| super(example); |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Lines"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("LineCap"); //$NON-NLS-1$ |
| } |
| |
| public String getDescription() { |
| return GraphicsExample.getResourceString("LineCapDescription"); //$NON-NLS-1$ |
| } |
| |
| public void dispose() { |
| if (menu != null) { |
| menu.dispose(); |
| menu = null; |
| } |
| } |
| |
| public void createControlPanel(Composite parent) { |
| |
| Composite comp; |
| |
| // 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) { |
| foreground = gb; |
| colorButton.setImage(gb.getThumbNail()); |
| example.redraw(); |
| } |
| }); |
| |
| // initialize the foreground to the 3rd item in the menu (red) |
| foreground = (GraphicsBackground)menu.getItem(2).getData(); |
| |
| // color button |
| colorButton = new Button(comp, SWT.PUSH); |
| colorButton.setText(GraphicsExample |
| .getResourceString("Color")); //$NON-NLS-1$ |
| colorButton.setImage(foreground.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) { |
| Device device = gc.getDevice(); |
| |
| // draw side lines |
| gc.setLineWidth(1); |
| gc.setLineStyle(SWT.LINE_DOT); |
| gc.setForeground(device.getSystemColor(SWT.COLOR_BLACK)); |
| gc.drawLine(3*width/16, height/6, 3*width/16, 5*height/6); |
| gc.drawLine(13*width/16, height/6, 13*width/16, 5*height/6); |
| gc.setLineStyle(SWT.LINE_SOLID); |
| |
| // draw labels |
| Font font = new Font(device, getPlatformFont(), 20, SWT.NORMAL); |
| gc.setFont(font); |
| |
| String text = GraphicsExample.getResourceString("Flat"); //$NON-NLS-1$ |
| Point size = gc.stringExtent(text); |
| gc.drawString(text, (width-size.x)/2, 3*height/12, true); |
| text = GraphicsExample.getResourceString("Square"); //$NON-NLS-1$ |
| size = gc.stringExtent(text); |
| gc.drawString(text, (width-size.x)/2, 5*height/12, true); |
| text = GraphicsExample.getResourceString("Round"); //$NON-NLS-1$ |
| size = gc.stringExtent(text); |
| gc.drawString(text, (width-size.x)/2, 7*height/12, true); |
| font.dispose(); |
| |
| Pattern pattern = null; |
| if (foreground.getBgColor1() != null) { |
| gc.setForeground(foreground.getBgColor1()); |
| } else if (foreground.getBgImage() != null) { |
| pattern = new Pattern(device, foreground.getBgImage()); |
| gc.setForegroundPattern(pattern); |
| } |
| |
| // draw lines with caps |
| gc.setLineWidth(20); |
| gc.setLineCap(SWT.CAP_FLAT); |
| gc.drawLine(3*width/16, 2*height/6, 13*width/16, 2*height/6); |
| gc.setLineCap(SWT.CAP_SQUARE); |
| gc.drawLine(3*width/16, 3*height/6, 13*width/16, 3*height/6); |
| gc.setLineCap(SWT.CAP_ROUND); |
| gc.drawLine(3*width/16, 4*height/6, 13*width/16, 4*height/6); |
| |
| if (pattern != null) pattern.dispose(); |
| } |
| |
| /** |
| * Returns the name of a valid font for the resident platform. |
| */ |
| static String getPlatformFont() { |
| if(SWT.getPlatform() == "win32") { |
| return "Arial"; |
| } else if (SWT.getPlatform() == "motif") { |
| return "Helvetica"; |
| } else if (SWT.getPlatform() == "gtk") { |
| return "Baekmuk Batang"; |
| } else if (SWT.getPlatform() == "carbon") { |
| return "Arial"; |
| } else { // photon, etc ... |
| return "Verdana"; |
| } |
| } |
| } |