examples/org.eclipse.swt.opengl.examples/src/org/eclipse/swt/opengl/examples/OutlineTextTab.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.opengl.examples;


 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.opengl.*;
 import org.eclipse.swt.widgets.*;

 class OutlineTextTab extends OpenGLTab {
 	private Text messageText;
 	private FontData fontData;
 	private float[] textColor = { 1.0f, 0.0f, 0.0f };
 	private boolean fill = true;
 	private float extrude = 0.0f;
 	private float xPos = 0.0f, yPos = 0.0f, zPos = -10.0f;
 	private float xRot = 0.0f;
 	private int listIndexBase;
 	private final static int LIST_INDEX_SIZE = 256;
 	private final static int DEFAULT_FONT_SIZE = 24;
 	private final static String DEFAULT_FONT_NAME = "Arial";
 	private final static int SLEEP_LENGTH = 50;

 	/**
 	 * @see OpenGLTab#createControls(Composite)
 	 */
 	void createControls(final Composite composite) {
 		if (!SWT.getPlatform().startsWith("win32")) {
 			new Label(composite, SWT.NONE).setText("This tab requires win32.");
 			return;
 		}

 		Group movementGroup = new Group(composite, SWT.NONE);
 		movementGroup.setText("Translation");
 		movementGroup.setLayout(new GridLayout(2, false));

 		new Label(movementGroup, SWT.NONE).setText("X:");
 		final Slider xMove = new Slider(movementGroup, SWT.NONE);
 		xMove.setIncrement(1);
 		xMove.setMaximum(22);
 		xMove.setMinimum(0);
 		xMove.setThumb(2);
 		xMove.setPageIncrement(2);
 		xMove.setSelection(10);
 		xMove.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				xPos = xMove.getSelection() - 10;
 			}
 		});

 		new Label(movementGroup, SWT.NONE).setText("Y:");
 		final Slider yMove = new Slider(movementGroup, SWT.NONE);
 		yMove.setIncrement(1);
 		yMove.setMaximum(22);
 		yMove.setMinimum(0);
 		yMove.setThumb(2);
 		yMove.setPageIncrement(2);
 		yMove.setSelection(10);
 		yMove.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				yPos = yMove.getSelection() - 10;
 			}
 		});

 		new Label(movementGroup, SWT.NONE).setText("Z:");
 		final Slider zMove = new Slider(movementGroup, SWT.NONE);
 		zMove.setIncrement(1);
 		zMove.setMaximum(22);
 		zMove.setMinimum(0);
 		zMove.setThumb(2);
 		zMove.setPageIncrement(2);
 		zMove.setSelection(10);
 		zMove.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				zPos = zMove.getSelection() - 20;
 			}
 		});

 		Composite textGroup = new Composite(composite,SWT.NONE);
 		GridLayout layout = new GridLayout(2,false);
 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		textGroup.setLayout(layout);
 		textGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

 		new Label(textGroup, SWT.NONE).setText("Text:");
 		messageText = new Text(textGroup, SWT.BORDER);
 		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		data.grabExcessHorizontalSpace = true;
 		messageText.setLayoutData(data);
 		messageText.setText("OpenGL - SWT");

 		new Label(composite, SWT.NONE).setText("Extrude:");
 		final Slider extrudeSlider = new Slider(composite, SWT.NONE);
 		extrudeSlider.setIncrement(1);
 		extrudeSlider.setMaximum(22);
 		extrudeSlider.setMinimum(0);
 		extrudeSlider.setThumb(2);
 		extrudeSlider.setPageIncrement(2);
 		extrudeSlider.setSelection(0);
 		extrudeSlider.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				extrude = (float) extrudeSlider.getSelection() / 10;
 				getContext().loadOutlineFont(
 					fontData, extrudeSlider.getDisplay(),
 					listIndexBase, 0, 255, 0.0f, extrude,
 					fill ? GL.GL_POLYGON : GL.GL_LINE,
 					null);
 			}
 		});

 		final Button fontSelectButton = new Button(composite, SWT.NONE);
 		fontSelectButton.setText("Set Font");
 		final ColorSelectionGroup colorGroup =
 			new ColorSelectionGroup(composite, SWT.NONE);
 		colorGroup.setText("Text color");
 		colorGroup.addColorSelectionListener(new IColorSelectionListener() {
 			public void handleColorSelection(RGB rgb) {
 				GL.glColor3ub((byte) rgb.red, (byte) rgb.green, (byte) rgb.blue);
 			}
 		});

 		fontSelectButton.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				FontDialog fontDialog = new FontDialog(fontSelectButton.getShell());
 				fontDialog.setText("Choose Font Options");
 				double[] currentColor = new double[4];
 				GL.glGetDoublev(GL.GL_CURRENT_COLOR, currentColor);
 				fontDialog.setRGB(
 					new RGB(
 						(int) currentColor[0] * 255,
 						(int) currentColor[1] * 255,
 						(int) currentColor[2] * 255));
 				fontDialog.setFontData(fontData);
 				FontData result = fontDialog.open();
 				if (result != null) {
 					fontData = result;
 					RGB rgb = fontDialog.getRGB();
 					GL.glColor3ub((byte) rgb.red, (byte) rgb.green, (byte) rgb.blue);
 					colorGroup.setRGB(rgb);
 					getContext().loadOutlineFont(
 						fontData, fontSelectButton.getDisplay(),
 						listIndexBase, 0, 255, 0.0f, extrude,
 						fill ? GL.GL_POLYGON : GL.GL_LINE,
 						null);
 				}
 			}
 		});

 		final Button fillButton = new Button(composite, SWT.CHECK);
 		fillButton.setText("Fill");
 		fillButton.setSelection(true);
 		fillButton.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				fill = fillButton.getSelection();
 				getContext().loadOutlineFont(
 					fontData, fillButton.getDisplay(),
 					listIndexBase, 0, 255, 0.0f, extrude,
 					fill ? GL.GL_POLYGON : GL.GL_LINE,
 					null);
 			}
 		});
 	}

 	/**
 	 * @see OpenGLTab#dispose()
 	 */
 	void dispose() {
 		super.dispose();
 		GL.glDeleteLists(listIndexBase, LIST_INDEX_SIZE);
 	}

 	/**
 	 * Draws the text to the screen
 	 *
 	 * @param string the text to draw
 	 */
 	void drawText(String string) {
 		char[] stringChars = string.toCharArray();
 		int[] text = new int[stringChars.length];
 		for (int i = 0; i < text.length; i++) {
 			text[i] = (int) stringChars[i];
 		}
 		GL.glPushAttrib(GL.GL_LIST_BIT);
 		GL.glListBase(listIndexBase);
 		GL.glCallLists(text.length, GL.GL_UNSIGNED_INT, text);
 		GL.glPopAttrib();
 	}

 	/**
 	 * @see OpenGLTab#getSleepLength()
 	 */
 	int getSleepLength() {
 		return SLEEP_LENGTH;
 	}

 	/**
 	 * @see OpenGLTab#getTabText()
 	 */
 	String getTabText() {
 		return "Outline Text";
 	}

 	/**
 	 * @see OpenGLTab#init()
 	 */
 	void init() {
 		GL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
 		GL.glColor3fv(textColor);
 		GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
 		GL.glEnable(GL.GL_DEPTH_TEST);
 		GL.glEnable(GL.GL_BLEND);
 		// build the initial font
 		listIndexBase = GL.glGenLists(LIST_INDEX_SIZE);
 		fontData = new FontData();
 		fontData.setHeight(DEFAULT_FONT_SIZE);
 		fontData.setName(DEFAULT_FONT_NAME);
 		getContext().loadOutlineFont(
 			fontData, getGlCanvas().getDisplay(),
 			listIndexBase, 0, 255, 0f, extrude,
 			fill ? GL.GL_POLYGON : GL.GL_LINE,
 			null);
 	}

 	/**
 	 * @see OpenGLTab#renderScene()
 	 */
 	void renderScene() {
 		GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
 		GL.glLoadIdentity();
 		GL.glTranslatef(xPos, yPos, zPos);
 		GL.glRotatef(xRot, 1.0f, 0.0f, 0.0f); // rotate on X axis
 		// use GL.glScalef to change size since outline fonts
 		// don't support size
 		float size = (float) fontData.getHeight() / 24;
 		GL.glScalef(size, size, 1.0f);
 		// draw the text, assuming that we're running on win32
 		if (messageText != null) drawText(messageText.getText());
 		xRot += 1.2f;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.opengl.examples;


	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.opengl.*;
	import org.eclipse.swt.widgets.*;

	class OutlineTextTab extends OpenGLTab {
	private Text messageText;
	private FontData fontData;
	private float[] textColor = { 1.0f, 0.0f, 0.0f };
	private boolean fill = true;
	private float extrude = 0.0f;
	private float xPos = 0.0f, yPos = 0.0f, zPos = -10.0f;
	private float xRot = 0.0f;
	private int listIndexBase;
	private final static int LIST_INDEX_SIZE = 256;
	private final static int DEFAULT_FONT_SIZE = 24;
	private final static String DEFAULT_FONT_NAME = "Arial";
	private final static int SLEEP_LENGTH = 50;

	/**
	* @see OpenGLTab#createControls(Composite)
	*/
	void createControls(final Composite composite) {
	if (!SWT.getPlatform().startsWith("win32")) {
	new Label(composite, SWT.NONE).setText("This tab requires win32.");
	return;
	}

	Group movementGroup = new Group(composite, SWT.NONE);
	movementGroup.setText("Translation");
	movementGroup.setLayout(new GridLayout(2, false));

	new Label(movementGroup, SWT.NONE).setText("X:");
	final Slider xMove = new Slider(movementGroup, SWT.NONE);
	xMove.setIncrement(1);
	xMove.setMaximum(22);
	xMove.setMinimum(0);
	xMove.setThumb(2);
	xMove.setPageIncrement(2);
	xMove.setSelection(10);
	xMove.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	xPos = xMove.getSelection() - 10;
	}
	});

	new Label(movementGroup, SWT.NONE).setText("Y:");
	final Slider yMove = new Slider(movementGroup, SWT.NONE);
	yMove.setIncrement(1);
	yMove.setMaximum(22);
	yMove.setMinimum(0);
	yMove.setThumb(2);
	yMove.setPageIncrement(2);
	yMove.setSelection(10);
	yMove.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	yPos = yMove.getSelection() - 10;
	}
	});

	new Label(movementGroup, SWT.NONE).setText("Z:");
	final Slider zMove = new Slider(movementGroup, SWT.NONE);
	zMove.setIncrement(1);
	zMove.setMaximum(22);
	zMove.setMinimum(0);
	zMove.setThumb(2);
	zMove.setPageIncrement(2);
	zMove.setSelection(10);
	zMove.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	zPos = zMove.getSelection() - 20;
	}
	});

	Composite textGroup = new Composite(composite,SWT.NONE);
	GridLayout layout = new GridLayout(2,false);
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	textGroup.setLayout(layout);
	textGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

	new Label(textGroup, SWT.NONE).setText("Text:");
	messageText = new Text(textGroup, SWT.BORDER);
	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	data.grabExcessHorizontalSpace = true;
	messageText.setLayoutData(data);
	messageText.setText("OpenGL - SWT");

	new Label(composite, SWT.NONE).setText("Extrude:");
	final Slider extrudeSlider = new Slider(composite, SWT.NONE);
	extrudeSlider.setIncrement(1);
	extrudeSlider.setMaximum(22);
	extrudeSlider.setMinimum(0);
	extrudeSlider.setThumb(2);
	extrudeSlider.setPageIncrement(2);
	extrudeSlider.setSelection(0);
	extrudeSlider.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	extrude = (float) extrudeSlider.getSelection() / 10;
	getContext().loadOutlineFont(
	fontData, extrudeSlider.getDisplay(),
	listIndexBase, 0, 255, 0.0f, extrude,
	fill ? GL.GL_POLYGON : GL.GL_LINE,
	null);
	}
	});

	final Button fontSelectButton = new Button(composite, SWT.NONE);
	fontSelectButton.setText("Set Font");
	final ColorSelectionGroup colorGroup =
	new ColorSelectionGroup(composite, SWT.NONE);
	colorGroup.setText("Text color");
	colorGroup.addColorSelectionListener(new IColorSelectionListener() {
	public void handleColorSelection(RGB rgb) {
	GL.glColor3ub((byte) rgb.red, (byte) rgb.green, (byte) rgb.blue);
	}
	});

	fontSelectButton.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	FontDialog fontDialog = new FontDialog(fontSelectButton.getShell());
	fontDialog.setText("Choose Font Options");
	double[] currentColor = new double[4];
	GL.glGetDoublev(GL.GL_CURRENT_COLOR, currentColor);
	fontDialog.setRGB(
	new RGB(
	(int) currentColor[0] * 255,
	(int) currentColor[1] * 255,
	(int) currentColor[2] * 255));
	fontDialog.setFontData(fontData);
	FontData result = fontDialog.open();
	if (result != null) {
	fontData = result;
	RGB rgb = fontDialog.getRGB();
	GL.glColor3ub((byte) rgb.red, (byte) rgb.green, (byte) rgb.blue);
	colorGroup.setRGB(rgb);
	getContext().loadOutlineFont(
	fontData, fontSelectButton.getDisplay(),
	listIndexBase, 0, 255, 0.0f, extrude,
	fill ? GL.GL_POLYGON : GL.GL_LINE,
	null);
	}
	}
	});

	final Button fillButton = new Button(composite, SWT.CHECK);
	fillButton.setText("Fill");
	fillButton.setSelection(true);
	fillButton.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	fill = fillButton.getSelection();
	getContext().loadOutlineFont(
	fontData, fillButton.getDisplay(),
	listIndexBase, 0, 255, 0.0f, extrude,
	fill ? GL.GL_POLYGON : GL.GL_LINE,
	null);
	}
	});
	}

	/**
	* @see OpenGLTab#dispose()
	*/
	void dispose() {
	super.dispose();
	GL.glDeleteLists(listIndexBase, LIST_INDEX_SIZE);
	}

	/**
	* Draws the text to the screen
	*
	* @param string the text to draw
	*/
	void drawText(String string) {
	char[] stringChars = string.toCharArray();
	int[] text = new int[stringChars.length];
	for (int i = 0; i < text.length; i++) {
	text[i] = (int) stringChars[i];
	}
	GL.glPushAttrib(GL.GL_LIST_BIT);
	GL.glListBase(listIndexBase);
	GL.glCallLists(text.length, GL.GL_UNSIGNED_INT, text);
	GL.glPopAttrib();
	}

	/**
	* @see OpenGLTab#getSleepLength()
	*/
	int getSleepLength() {
	return SLEEP_LENGTH;
	}

	/**
	* @see OpenGLTab#getTabText()
	*/
	String getTabText() {
	return "Outline Text";
	}

	/**
	* @see OpenGLTab#init()
	*/
	void init() {
	GL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
	GL.glColor3fv(textColor);
	GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
	GL.glEnable(GL.GL_DEPTH_TEST);
	GL.glEnable(GL.GL_BLEND);
	// build the initial font
	listIndexBase = GL.glGenLists(LIST_INDEX_SIZE);
	fontData = new FontData();
	fontData.setHeight(DEFAULT_FONT_SIZE);
	fontData.setName(DEFAULT_FONT_NAME);
	getContext().loadOutlineFont(
	fontData, getGlCanvas().getDisplay(),
	listIndexBase, 0, 255, 0f, extrude,
	fill ? GL.GL_POLYGON : GL.GL_LINE,
	null);
	}

	/**
	* @see OpenGLTab#renderScene()
	*/
	void renderScene() {
	GL.glClear(GL.GL_COLOR_BUFFER_BIT \| GL.GL_DEPTH_BUFFER_BIT);
	GL.glLoadIdentity();
	GL.glTranslatef(xPos, yPos, zPos);
	GL.glRotatef(xRot, 1.0f, 0.0f, 0.0f); // rotate on X axis
	// use GL.glScalef to change size since outline fonts
	// don't support size
	float size = (float) fontData.getHeight() / 24;
	GL.glScalef(size, size, 1.0f);
	// draw the text, assuming that we're running on win32
	if (messageText != null) drawText(messageText.getText());
	xRot += 1.2f;
	}
	}