Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/shared/Transform2D.java @ 5462:f2371f3aaf03
Show top level folder icons only if node has no factory
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author | Andre Heinecke <aheinecke@intevation.de> |
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date | Tue, 26 Mar 2013 18:29:13 +0100 |
parents | ef745bc6bed9 |
children |
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package de.intevation.flys.client.shared; import java.io.Serializable; import java.util.Date; import com.google.gwt.core.client.GWT; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.i18n.client.DateTimeFormat.PredefinedFormat; import com.google.gwt.i18n.client.NumberFormat; /** * This object supports a linear transformation to transform xy coordinates into * an other coordinate system based on scale and translation values. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class Transform2D implements Serializable { protected String xType; protected String yType; protected double sx; protected double sy; protected double tx; protected double ty; public Transform2D() { } /** * Creates a new transformation with scale and translation factors. * * @param sx The scale factor for the x axis. * @param sy The scale factor for the y axis. * @param tx The translation factor for the x axis. * @param ty The translation factor for the y axis. */ public Transform2D(double sx, double sy, double tx, double ty) { this(sx, sy, tx, ty, "number", "number"); } public Transform2D( double sx, double sy, double tx, double ty, String xType, String yType ) { this.xType = xType; this.yType = yType; this.sx = sx; this.sy = sy; this.tx = tx; this.ty = ty; } /** * Transforms the pixel x and y into a new coordinate system based on the * scale and translation values specified in the constructor. */ public double[] transform(double x, double y) { double resX = sx * x + tx; double resY = sy * y + ty; return new double[] { resX, resY }; } public String[] format(Number[] xy) { String x = null; String y = null; if (xType.equals("date")) { x = formatDate(xy[0].longValue()); } else { x = formatNumber(xy[0].doubleValue()); } if (yType.equals("date")) { y = formatDate(xy[1].longValue()); } else { y = formatNumber(xy[1].doubleValue()); } return new String[] { x, y }; } protected String formatDate(long time) { Date date = new Date(time); DateTimeFormat df = getDateTimeFormat(); return df.format(date); } protected String formatNumber(double number) { NumberFormat nf = getNumberFormat(); return nf.format(number); } public DateTimeFormat getDateTimeFormat() { return DateTimeFormat.getFormat(PredefinedFormat.DATE_SHORT); } public NumberFormat getNumberFormat() { return NumberFormat.getDecimalFormat(); } public void dumpGWT() { GWT.log("SX = " + sx); GWT.log("SY = " + sy); GWT.log("TX = " + tx); GWT.log("TY = " + ty); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :