org.geomajas.gwt2.client.gfx.AnchoredImage Maven / Gradle / Ivy
/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2014 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.gwt2.client.gfx;
import org.vaadin.gwtgraphics.client.Image;
/**
* A non-scaling image that is anchored to its world space location on a specific pixel or anchor location (useful for
* location markers).
*
* @author Jan De Moerloose
*
*/
public class AnchoredImage extends Image {
private int anchorX;
private int anchorY;
/**
* Creates an image at the specified world location with a specified size and anchor point. E.g., if
* (anchorX,anchorY)=(width/2, height/2), the center of the image will be positioned the world location.
*
* @param userX x-location in world coordinates
* @param userY y-location in world coordinates
* @param width width in pixels
* @param height height in pixels
* @param href URL of the image (use absolute URLs, not GWT-based !)
* @param anchorX x-location of the anchor point (image-relative)
* @param anchorY y-location of the anchor point (image-relative)
*/
public AnchoredImage(double userX, double userY, int width, int height, String href, int anchorX, int anchorY) {
super(userX, userY, width, height, href);
this.anchorX = anchorX;
this.anchorY = anchorY;
}
@Override
protected void drawTransformed() {
getImpl().setX(getElement(), (int) Math.round(getUserX() * getScaleX() + getDeltaX()) - anchorX, isAttached());
getImpl().setY(getElement(), (int) Math.round(getUserY() * getScaleY() + getDeltaY()) - anchorY, isAttached());
// don't scale, but have to set width/height here !
setWidth((int) getUserWidth());
setHeight((int) getUserHeight());
}
}