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/*******************************************************************************
* Copyright (c) 2010, 2011 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.widgets;
import org.eclipse.swt.graphics.*;
/**
* Instances of this class represent sources of touch input that generate <code>Touch</code> objects.
* They also provide information about the input source, which is important for interpreting the
* information in the <code>Touch</code> object.
* <p>
* Instances of this class can be marked as direct or indirect:
* <ul>
* <li>When an instance is <em>direct</em>, the touch source is a touch-sensitive digitizer surface such
* as a tablet or a touch screen. There is a one-to-one mapping between a touch point and a location in
* a window.
* </li><li>
* When an instance is <em>indirect</em> (more precisely, not direct), the touch source is a track pad or
* other device that normally moves the cursor, but is also able to interpret multiple touches on its surface.
* In this case there is not a one-to-one mapping between the location of the touch on the device and a
* location on the display because the user can remove their finger or stylus and touch another part of
* the device and resume what they were doing.
* </li>
* </ul>
*
* @see Touch
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*
* @since 3.7
*/
public final class TouchSource {
long /*int*/ handle;
boolean direct;
Rectangle bounds;
/**
* Constructs a new touch source from the given inputs.
*
* @param direct Is the touch source direct or indirect?
* @param height height of the source in pixels.
* @param width width of the source in pixels.
*/
TouchSource (long /*int*/ handle, boolean direct, Rectangle bounds) {
this.handle = handle;
this.direct = direct;
this.bounds = bounds;
}
/**
* Returns the type of touch input this source generates, <code>true</code> for direct or <code>false</code> for indirect.
*
* @return <code>true</code> if the input source is direct, or <code>false</code> otherwise
*/
public boolean isDirect () {
return direct;
}
/**
* Returns the bounding rectangle of the device. For a direct source, this corresponds to the bounds of
* the display device in pixels. For an indirect source, this contains the size of the device in pixels.
* <p>
* Note that the x and y values may not necessarily be 0 if the TouchSource is a direct source.
*
* @return the bounding rectangle of the input source
*/
public Rectangle getBounds () {
return new Rectangle (bounds.x, bounds.y, bounds.width, bounds.height);
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the event
*/
public String toString () {
return "TouchSource {handle=" + handle + " direct=" + direct + " bounds=" + bounds + "}";
}
}
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