| /******************************************************************************* |
| * 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 presents a count down from 5 to 1, then displays SWT. |
| * */ |
| public class CountDownTab extends AnimatedGraphicsTab { |
| |
| final int startNumber = 5; // number at which to start the countdown |
| int nextNumber = startNumber; // next number to be displayed |
| int angle = -90; // angle used to rotate the bar |
| |
| Spinner lineWidthSpinner; // spinner for line width |
| Combo aliasCombo, lineCapCombo; // combo for alias type and line cap |
| int antialias, lineCap; // antialias and linecap values |
| int[] capValues = { SWT.CAP_FLAT, SWT.CAP_SQUARE, SWT.CAP_ROUND }; |
| int[] aliasValues = { SWT.DEFAULT, SWT.OFF, SWT.ON }; |
| |
| /** |
| * Constructor |
| * |
| * @param example |
| * A GraphicsExample |
| */ |
| public CountDownTab(GraphicsExample example) { |
| super(example); |
| } |
| |
| /** |
| * This method creates the controls specific to the tab. The call to the |
| * createControlPanel method in the super class create the controls that are |
| * defined in the super class. |
| * |
| * @param parent |
| * The parent composite |
| */ |
| public void createControlPanel(Composite parent) { |
| super.createControlPanel(parent); |
| |
| if (nextNumber < 1) |
| nextNumber = startNumber; |
| |
| // add selection listener to reset nextNumber after |
| // the sequence has completed |
| playItem.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| if (nextNumber < 1) |
| nextNumber = startNumber; |
| } |
| }); |
| |
| Composite comp; |
| GridLayout gridLayout = new GridLayout(2, false); |
| |
| // create spinner for line width |
| comp = new Composite(parent, SWT.NONE); |
| comp.setLayout(gridLayout); |
| new Label(comp, SWT.CENTER).setText(GraphicsExample |
| .getResourceString("LineWidth")); //$NON-NLS-1$ |
| lineWidthSpinner = new Spinner(comp, SWT.BORDER | SWT.WRAP); |
| lineWidthSpinner.setSelection(20); |
| lineWidthSpinner.setMinimum(1); |
| lineWidthSpinner.setMaximum(100); |
| lineWidthSpinner.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| if (!pauseItem.isEnabled()) { |
| example.redraw(); |
| } |
| } |
| }); |
| |
| // create drop down combo for antialiasing |
| comp = new Composite(parent, SWT.NONE); |
| comp.setLayout(gridLayout); |
| new Label(comp, SWT.CENTER).setText(GraphicsExample |
| .getResourceString("Antialiasing")); //$NON-NLS-1$ |
| aliasCombo = new Combo(comp, SWT.DROP_DOWN); |
| aliasCombo.add("DEFAULT"); |
| aliasCombo.add("OFF"); |
| aliasCombo.add("ON"); |
| aliasCombo.select(0); |
| antialias = aliasValues[0]; |
| aliasCombo.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| antialias = aliasValues[aliasCombo.getSelectionIndex()]; |
| if (!pauseItem.isEnabled()) { |
| example.redraw(); |
| } |
| } |
| }); |
| |
| // create drop down combo for line cap |
| comp = new Composite(parent, SWT.NONE); |
| comp.setLayout(gridLayout); |
| new Label(comp, SWT.CENTER).setText(GraphicsExample |
| .getResourceString("LineCap")); //$NON-NLS-1$ |
| lineCapCombo = new Combo(comp, SWT.DROP_DOWN); |
| lineCapCombo.add("FLAT"); |
| lineCapCombo.add("SQUARE"); |
| lineCapCombo.add("ROUND"); |
| lineCapCombo.select(0); |
| lineCap = capValues[0]; |
| lineCapCombo.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| lineCap = capValues[lineCapCombo.getSelectionIndex()]; |
| if (!pauseItem.isEnabled()) { |
| example.redraw(); |
| } |
| } |
| }); |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Misc"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("Countdown"); //$NON-NLS-1$ |
| } |
| |
| public String getDescription() { |
| return GraphicsExample.getResourceString("CountdownDescription"); //$NON-NLS-1$ |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.swt.examples.graphics.AnimatedGraphicsTab#getAnimationTime() |
| */ |
| public int getInitialAnimationTime() { |
| return 28; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.swt.examples.graphics.AnimatedGraphicsTab#next(int, int) |
| */ |
| public void next(int width, int height) { |
| |
| if (angle == 270) { |
| nextNumber--; |
| if (nextNumber < 1) { |
| // stop animation |
| setAnimation(false); |
| } |
| angle = -90; |
| } |
| angle += 10; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.swt.examples.graphics.GraphicsTab#paint(org.eclipse.swt.graphics.GC, |
| * int, int) |
| */ |
| public void paint(GC gc, int width, int height) { |
| if (!example.checkAdvancedGraphics()) return; |
| Device device = gc.getDevice(); |
| |
| // diameter of the circle in pixels |
| int diameter = ((width < height) ? width - 25 : height - 25); |
| |
| if (!getAnimation() && nextNumber == 0) { |
| Font font = new Font(device, getPlatformFontFace(1), diameter/2, |
| SWT.NONE); |
| gc.setFont(font); |
| |
| // display "SWT" |
| gc.setForeground(device.getSystemColor(SWT.COLOR_DARK_BLUE)); |
| gc.setTextAntialias(SWT.ON); |
| |
| // determine the dimensions of the word |
| String text = GraphicsExample.getResourceString("SWT"); |
| Point point = gc.stringExtent(text); |
| int textWidth = point.x; |
| int textHeight = point.y; |
| gc.drawString(text, (width-textWidth)/2, |
| (height-textHeight)/2, true); |
| font.dispose(); |
| |
| } else { |
| |
| Font font = new Font(device, getPlatformFontFace(0), |
| 6*diameter/10, SWT.NONE); |
| gc.setFont(font); |
| |
| // set attributes from controls |
| gc.setLineWidth(lineWidthSpinner.getSelection()); |
| gc.setLineCap(lineCap); // round line ends |
| gc.setAntialias(antialias); // smooth jagged edges |
| gc.setTextAntialias(antialias); // smooth jagged edges |
| |
| // draw the circles |
| Path path = new Path(device); |
| path.addArc((width-diameter)/2, (height-diameter)/2, |
| diameter, diameter, 0, 360); |
| path.addArc((width-diameter+50)/2, |
| (height-diameter+50)/2, diameter-50, diameter-50, |
| 0, 360); |
| gc.drawPath(path); |
| gc.setBackground(device.getSystemColor(SWT.COLOR_RED)); |
| gc.fillPath(path); |
| path.dispose(); |
| |
| Point point = gc.stringExtent(new Integer(nextNumber).toString()); |
| int textWidth = point.x; |
| int textHeight = point.y; |
| |
| // draw the number |
| gc.drawString(new Integer(nextNumber).toString(), |
| (width-textWidth)/2, (height-textHeight)/2, true); |
| |
| // draw the rotating arm |
| Transform transform = new Transform(device); |
| transform.translate(width/2, height/2); |
| transform.rotate(angle); |
| gc.setTransform(transform); |
| gc.setForeground(device.getSystemColor(SWT.COLOR_RED)); |
| gc.drawLine(0, 0, diameter/2, 0); |
| transform.dispose(); |
| |
| font.dispose(); |
| } |
| } |
| |
| /** |
| * Returns the name of a valid font for the resident platform. |
| * |
| * @param index |
| * index is used to determine the appropriate font face |
| */ |
| static String getPlatformFontFace(int index) { |
| if (SWT.getPlatform() == "win32") { |
| return new String[] { "Courier", "Impact" }[index]; |
| } else if (SWT.getPlatform() == "motif") { |
| return new String[] { "Courier", "URW Gothic L" }[index]; |
| } else if (SWT.getPlatform() == "gtk") { |
| return new String[] { "Courier", "Baekmuk Headline" }[index]; |
| } else if (SWT.getPlatform() == "carbon") { |
| return new String[] { "Courier", "Impact" }[index]; |
| } else { // photon, etc ... |
| return new String[] { "Courier", "Verdana" }[index]; |
| } |
| } |
| } |