svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / ui / cmd / CmdPan.java @ 109
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package org.cresques.ui.cmd; |
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import java.awt.geom.Point2D; |
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import org.cresques.ui.CQCursor; |
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import org.cresques.ui.CQMapCanvas; |
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/**
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* Comando pan.
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* A?ade al canvas la capacidad de desplazar la vista.
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es>
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*/
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public class CmdPan extends Cmd { |
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private Point2D ptIni = null; |
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/**
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* Construye un nuevo CmdPan para el Canvas.
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* @param canvas
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*/
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public CmdPan(CQMapCanvas canvas) {
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super(canvas);
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eventsWanted = LEFT | PRESS | RELEASE; |
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cursor = CQCursor.getCursor(CQCursor.PAN_CURSOR); |
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} |
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/**
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* Recibe los eventos del rat?n.
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*/
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public void cmd(Point2D pt, int btn, int mouseEvent) { |
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if (mouseEvent == Cmd.RELEASE) {
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pan(ptIni, pt); |
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} else if (mouseEvent == Cmd.PRESS) { |
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ptIni = pt; |
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} |
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} |
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/**
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* Realiza un desplazamiento de la vista.
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* @param ptIni Punto inicial.
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* @param ptFin Punto final.
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*/void pan(Point2D ptIni, Point2D ptFin) { |
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canvas.getVPData().pan(ptIni, ptFin); |
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canvas.viewPortChanged(); |
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canvas.repaint(); |
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} |
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} |