Revision 20098 trunk/libraries/libFMap/src/com/iver/cit/gvsig/fmap/tools/ZoomOutListenerImpl.java
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/** |
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* Implementaci?n de la interfaz PointListener como herramienta para realizar |
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* un zoom menos. |
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* <p>Listener for doing a <i>zoom out</i> operation on the extent of the <code>ViewPort</code> of the associated {@link MapControl MapControl}
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* object, selecting a point of the <code>MapControl</code> by a single click of any mouse's button.</p> |
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* |
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* <p>Calculates the new extent <i>r</i> with this equations: |
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* <code><br> |
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* ViewPort vp = mapControl.getMapContext().getViewPort();<br> |
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* Point2D p2 = vp.toMapPoint(event.getPoint());<br> |
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* double factor = 1/MapContext.ZOOMOUTFACTOR;<br> |
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* Rectangle2D.Double r = new Rectangle2D.Double();<br> |
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* double nuevoX = p2.getX() - ((vp.getExtent().getWidth() * factor) / 2.0);<br> |
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* double nuevoY = p2.getY() - ((vp.getExtent().getHeight() * factor) / 2.0);<br> |
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* r.x = nuevoX;<br> |
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* r.y = nuevoY;<br> |
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* r.width = vp.getExtent().getWidth() * factor;<br> |
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* r.height = vp.getExtent().getHeight() * factor;<br> |
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* vp.setExtent(r); |
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* </code> |
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* </p> |
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* |
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* <p>The ultimately extent will be an adaptation from that, calculated by the <code>ViewPort</code> |
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* bearing in mind the ratio of the available rectangle.</p> |
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* |
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* @see MapContext#ZOOMOUTFACTOR |
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* @see ViewPort#setExtent(Rectangle2D) |
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* @see ZoomInListenerImpl |
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* @see ZoomOutRightButtonListener |
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* |
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* @author Vicente Caballero Navarro |
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*/ |
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public class ZoomOutListenerImpl implements PointListener {
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/** |
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* The image to display when the cursor is active. |
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*/ |
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private final Image izoomout = new ImageIcon(MapControl.class.getResource( |
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"images/ZoomOutCursor.gif")).getImage(); |
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/** |
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* The cursor used to work with this tool listener. |
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* |
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* @see #getCursor() |
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*/ |
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private Cursor cur = Toolkit.getDefaultToolkit().createCustomCursor(izoomout, |
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new Point(16, 16), ""); |
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/** |
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* Reference to the <code>MapControl</code> object that uses. |
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*/ |
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private MapControl mapControl; |
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/** |
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* Crea un nuevo ZoomOutListenerImpl.
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* |
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* @param mapControl MapControl.
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* <p>Creates a new <code>ZoomOutListenerImpl</code> object.</p>
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*
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* @param mapControl the <code>MapControl</code> where will be applied the changes
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*/ |
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public ZoomOutListenerImpl(MapControl mapControl) {
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this.mapControl = mapControl; |
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} |
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/** |
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#point(com.iver.cit.gvsig.fmap.tools.PointEvent) |
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/* |
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* (non-Javadoc) |
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#point(com.iver.cit.gvsig.fmap.tools.Events.PointEvent) |
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*/ |
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public void point(PointEvent event) {
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ViewPort vp = mapControl.getMapContext().getViewPort(); |
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// mapControl.drawMap(false); |
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} |
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/** |
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/* |
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* (non-Javadoc) |
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#getCursor() |
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*/ |
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public Cursor getCursor() {
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return cur; |
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} |
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/** |
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/* |
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* (non-Javadoc) |
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#cancelDrawing() |
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*/ |
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public boolean cancelDrawing() {
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return true; |
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} |
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/* |
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* (non-Javadoc) |
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#pointDoubleClick(com.iver.cit.gvsig.fmap.tools.Events.PointEvent) |
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*/ |
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public void pointDoubleClick(PointEvent event) {
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// TODO Auto-generated method stub |
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} |
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} |
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