Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/ChartOutputTab.java @ 555:33b86f5b1168
Don't crash if there is no transformer.
flys-client/trunk@2078 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 08 Jun 2011 10:57:28 +0000 |
parents | 6050d49eaba3 |
children | 460b8e0f0563 |
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package de.intevation.flys.client.client.ui.chart; import java.util.Date; import java.util.HashMap; import java.util.Map; import com.google.gwt.core.client.GWT; import com.google.gwt.user.client.rpc.AsyncCallback; import com.smartgwt.client.widgets.Canvas; import com.smartgwt.client.widgets.Img; import com.smartgwt.client.widgets.layout.HLayout; import com.smartgwt.client.widgets.layout.VLayout; import com.smartgwt.client.widgets.events.ResizedEvent; import com.smartgwt.client.widgets.events.ResizedHandler; import de.intevation.flys.client.shared.Transform2D; import de.intevation.flys.client.shared.model.Axis; import de.intevation.flys.client.shared.model.ChartInfo; import de.intevation.flys.client.shared.model.Collection; import de.intevation.flys.client.shared.model.OutputMode; import de.intevation.flys.client.client.Config; import de.intevation.flys.client.client.event.OutputParameterChangeEvent; import de.intevation.flys.client.client.event.OutputParameterChangeHandler; import de.intevation.flys.client.client.event.PanEvent; import de.intevation.flys.client.client.event.PanHandler; import de.intevation.flys.client.client.event.ZoomEvent; import de.intevation.flys.client.client.event.ZoomHandler; import de.intevation.flys.client.client.services.ChartInfoService; import de.intevation.flys.client.client.services.ChartInfoServiceAsync; import de.intevation.flys.client.client.ui.CollectionView; import de.intevation.flys.client.client.ui.OutputTab; /** * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class ChartOutputTab extends OutputTab implements ResizedHandler, OutputParameterChangeHandler, ZoomHandler, PanHandler { public static final int DEFAULT_CHART_WIDTH = 600; public static final int DEFAULT_CHART_HEIGHT = 500; public static final int THEMEPANEL_MIN_WIDTH = 200; /** The service that is used to fetch chart information.*/ protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class); /** The ChartInfo object that provides information about the current * chart.*/ protected ChartInfo chartInfo; /** The transformer used to transform image pixels into chart coordinates.*/ protected Transform2D transformer; /** The collection view.*/ protected CollectionView view; /** The canvas that wraps the chart toolbar.*/ protected Canvas tbarPanel; /** The canvas that wraps the theme editor.*/ protected Canvas left; /** The canvas that wraps the chart.*/ protected Canvas right; /** Chart zoom options.*/ protected double[] xrange; protected double[] yrange; /** * The default constructor to create a new ChartOutputTab. * * @param title The title of this tab. * @param collection The Collection which this chart belongs to. * @param mode The OutputMode. */ public ChartOutputTab( String title, Collection collection, OutputMode mode, CollectionView collectionView ){ super(title, collection, mode); view = collectionView; left = new Canvas(); right = new Canvas(); tbarPanel = new ChartToolbar(collectionView, this); xrange = new double[2]; yrange = new double[2]; left.setBorder("1px solid black"); left.setWidth(THEMEPANEL_MIN_WIDTH); left.setMinWidth(THEMEPANEL_MIN_WIDTH); right.setWidth("*"); VLayout vLayout = new VLayout(); vLayout.setMembersMargin(2); HLayout hLayout = new HLayout(); hLayout.setWidth100(); hLayout.setHeight100(); hLayout.setMembersMargin(10); hLayout.addMember(left); hLayout.addMember(right); ChartThemePanel ctp = new ChartThemePanel(collection, mode); ctp.addOutputParameterChangeHandler(this); right.addChild(createChartPanel()); left.addChild(ctp); vLayout.addMember(tbarPanel); vLayout.addMember(hLayout); setPane(vLayout); right.addResizedHandler(this); } /** * This method is called after the chart panel has resized. It removes the * chart - if existing - and requests a new one with adjusted size. * * @param event The resize event. */ public void onResized(ResizedEvent event) { updateChartPanel(); updateTransformer(); } /** * Listens to change event in the chart them panel and updates chart after * receiving such an event. * * @param event The OutputParameterChangeEvent. */ public void onOutputParameterChanged(OutputParameterChangeEvent event) { updateChartPanel(); } /** * Listens to zoom events and refreshes the current chart in such case. * * @param evt The ZoomEvent that stores the coordinates for zooming. */ public void onZoom(ZoomEvent evt) { if (transformer == null) { return; } double[] lower = transformer.transform(evt.getStartX(), evt.getStartY()); double[] upper = transformer.transform(evt.getEndX(), evt.getEndY()); xrange[0] = lower[0]; xrange[1] = upper[0]; yrange[0] = upper[1]; yrange[1] = lower[1]; updateTransformer(); updateChartPanel(); } public void onPan(PanEvent event) { if (transformer == null) { return; } int[] start = event.getStartPos(); int[] end = event.getEndPos(); double[] startPos = transformer.transform(start[0], start[1]); double[] endPos = transformer.transform(end[0], end[1]); double diffX = startPos[0] - endPos[0]; double diffY = startPos[1] - endPos[1]; panTo(diffX, diffY); } /** * This method pans to chart with a given factor. */ public void panTo(double diffX, double diffY) { Axis xAxis = chartInfo.getXAxis(0); Axis yAxis = chartInfo.getYAxis(0); xrange[0] = xAxis.getFrom() + diffX; xrange[1] = xAxis.getTo() + diffX; yrange[0] = yAxis.getFrom() + diffY; yrange[1] = yAxis.getTo() + diffY; updateTransformer(); updateChartPanel(); } public void resetRanges() { xrange[0] = 0; xrange[1] = 0; yrange[0] = 0; yrange[1] = 0; updateTransformer(); updateChartPanel(); } /** * This method is used to zoom out. * * @param factor The factor should be between 0-100. */ public void zoomOut(int factor) { if (factor < 0 || factor > 100 || xrange == null || yrange == null) { return; } double xadd = (xrange[1] - xrange[0]) / 100 * factor; double yadd = (yrange[1] - yrange[0]) / 100 * factor; xrange[0] -= xadd; xrange[1] += xadd; yrange[0] -= yadd; yrange[1] += yadd; updateTransformer(); updateChartPanel(); } /** * Updates the Transform2D object using the chart info service. */ public void updateTransformer() { Config config = Config.getInstance(); String url = config.getServerUrl(); String locale = config.getLocale(); info.getChartInfo( view.getCollection(), url, locale, mode.getName(), getChartAttributes(), new AsyncCallback<ChartInfo>() { public void onFailure(Throwable caught) { GWT.log("ERROR: " + caught.getMessage()); } public void onSuccess(ChartInfo chartInfo) { setChartInfo(chartInfo); } }); } public void updateChartPanel() { Canvas[] children = right.getChildren(); for (Canvas child: children) { right.removeChild(child); } right.addChild(createChartPanel(right.getWidth(), right.getHeight())); } /** * Returns the existing chart panel. * * @return the existing chart panel. */ public Canvas getChartPanel() { Canvas[] children = right.getChildren(); if (children == null || children.length == 0) { GWT.log("=> No chart image in the panel."); return right; } return children[0]; } public ChartInfo getChartInfo() { return chartInfo; } protected void setChartInfo(ChartInfo chartInfo) { this.chartInfo = chartInfo; setTransformer(chartInfo.getTransformer()); } /** * Returns the Transform2D object used to transform image coordinates into * chart coordinates. * * @return the Transform2D object. */ public Transform2D getTransformer() { return transformer; } /** * Set a new Transform2D object for the chart. This should be the case, only * if the chart image size has changed. * * @param transformer The new Transform2D object. */ protected void setTransformer(Transform2D transformer) { this.transformer = transformer; } /** * Creates a new chart panel with default size. * * @return the created chart panel. */ protected Canvas createChartPanel() { return createChartPanel(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT); } /** * Creates a new chart panel with specified width and height. * * @param width The width for the chart panel. * @param height The height for the chart panel. * * @return the created chart panel. */ protected Canvas createChartPanel(int width, int height) { Img chart = getChartImg(width, height); chart.setWidth100(); chart.setHeight100(); return chart; } /** * Builds the chart image and returns it. * * @param width The chart width. * @param height The chart height. * * @return the chart image. */ protected Img getChartImg(int width, int height) { return new Img(getImgUrl(width, height)); } /** * Builds the URL that points to the chart image. * * @param width The width of the requested chart. * @param height The height of the requested chart. * @param xr Optional x range (used for zooming). * @param yr Optional y range (used for zooming). * * @return the URL to the chart image. */ protected String getImgUrl(int width, int height) { Config config = Config.getInstance(); String imgUrl = GWT.getModuleBaseURL(); imgUrl += "chart"; imgUrl += "?uuid=" + collection.identifier(); imgUrl += "&type=" + mode.getName(); imgUrl += "&server=" + config.getServerUrl(); imgUrl += "&locale=" + config.getLocale(); imgUrl += "×tamp=" + new Date().getTime(); imgUrl += "&width=" + Integer.toString(width); imgUrl += "&height=" + Integer.toString(height); if (xrange != null) { GWT.log("Zoom to xrange."); imgUrl += "&minx=" + Double.toString(xrange[0]); imgUrl += "&maxx=" + Double.toString(xrange[1]); } if (yrange != null) { GWT.log("Zoom to xrange."); imgUrl += "&miny=" + Double.toString(yrange[0]); imgUrl += "&maxy=" + Double.toString(yrange[1]); } return imgUrl; } public Map getChartAttributes() { Map<String, String> attr = new HashMap<String, String>(); Canvas chart = getChartPanel(); attr.put("width", chart.getWidth().toString()); attr.put("height", chart.getHeight().toString()); if (xrange != null) { attr.put("minx", Double.toString(xrange[0])); attr.put("maxx", Double.toString(xrange[1])); } if (yrange != null) { attr.put("miny", Double.toString(yrange[0])); attr.put("maxy", Double.toString(yrange[1])); } return attr; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :