ingo@521: package de.intevation.flys.client.client.ui.chart;
ingo@521: 
ingo@521: import java.util.Date;
ingo@549: import java.util.HashMap;
ingo@549: import java.util.Map;
ingo@1280: import java.util.Stack;
ingo@521: 
ingo@521: import com.google.gwt.core.client.GWT;
ingo@538: import com.google.gwt.user.client.rpc.AsyncCallback;
ingo@521: 
ingo@610: import com.smartgwt.client.types.Overflow;
ingo@610: 
ingo@521: import com.smartgwt.client.widgets.Canvas;
ingo@521: import com.smartgwt.client.widgets.Img;
ingo@521: 
ingo@521: import com.smartgwt.client.widgets.layout.HLayout;
ingo@521: import com.smartgwt.client.widgets.layout.VLayout;
ingo@521: 
ingo@521: import com.smartgwt.client.widgets.events.ResizedEvent;
ingo@521: import com.smartgwt.client.widgets.events.ResizedHandler;
ingo@521: 
ingo@538: import de.intevation.flys.client.shared.Transform2D;
ingo@552: import de.intevation.flys.client.shared.model.Axis;
ingo@552: import de.intevation.flys.client.shared.model.ChartInfo;
ingo@521: import de.intevation.flys.client.shared.model.Collection;
ingo@521: import de.intevation.flys.client.shared.model.OutputMode;
ingo@1280: import de.intevation.flys.client.shared.model.ZoomObj;
ingo@521: import de.intevation.flys.client.client.Config;
ingo@531: import de.intevation.flys.client.client.event.OutputParameterChangeEvent;
ingo@531: import de.intevation.flys.client.client.event.OutputParameterChangeHandler;
ingo@552: import de.intevation.flys.client.client.event.PanEvent;
ingo@552: import de.intevation.flys.client.client.event.PanHandler;
felix@858: import de.intevation.flys.client.client.event.RedrawRequestHandler;
ingo@911: import de.intevation.flys.client.client.event.RedrawRequestEvent;
ingo@911: import de.intevation.flys.client.client.event.RedrawRequestEvent.Type;
ingo@541: import de.intevation.flys.client.client.event.ZoomEvent;
ingo@541: import de.intevation.flys.client.client.event.ZoomHandler;
ingo@538: import de.intevation.flys.client.client.services.ChartInfoService;
ingo@538: import de.intevation.flys.client.client.services.ChartInfoServiceAsync;
ingo@521: import de.intevation.flys.client.client.ui.CollectionView;
ingo@521: import de.intevation.flys.client.client.ui.OutputTab;
ingo@521: 
ingo@521: 
ingo@521: /**
ingo@521:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@521:  */
ingo@531: public class ChartOutputTab
ingo@531: extends      OutputTab
felix@855: implements   ResizedHandler,
felix@855:              OutputParameterChangeHandler,
felix@855:              ZoomHandler,
felix@858:              PanHandler,
felix@858:              RedrawRequestHandler
ingo@531: {
ingo@521:     public static final int DEFAULT_CHART_WIDTH  = 600;
ingo@521:     public static final int DEFAULT_CHART_HEIGHT = 500;
ingo@521: 
ingo@527:     public static final int THEMEPANEL_MIN_WIDTH = 200;
ingo@527: 
ingo@527: 
felix@855:     /** The service that is used to fetch chart information. */
ingo@538:     protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class);
ingo@538: 
ingo@552: 
ingo@552:     /** The ChartInfo object that provides information about the current
felix@855:      * chart. */
ingo@552:     protected ChartInfo chartInfo;
ingo@552: 
felix@855:     /** Transformer used to transform image pixels into chart coordinates. */
ingo@561:     protected Transform2D[] transformer;
ingo@538: 
ingo@538:     /** The collection view.*/
ingo@538:     protected CollectionView view;
ingo@538: 
ingo@911:     protected ChartThemePanel ctp;
ingo@911: 
ingo@538: 
felix@855:     /** The canvas that wraps the chart toolbar. */
ingo@521:     protected Canvas tbarPanel;
ingo@521: 
felix@855:     /** The canvas that wraps the theme editor. */
ingo@521:     protected Canvas left;
ingo@521: 
felix@855:     /** The canvas that wraps the chart. */
ingo@521:     protected Canvas right;
ingo@521: 
ingo@610:     protected Img chart;
ingo@610: 
ingo@521: 
felix@855:     /** Chart zoom options. */
ingo@561:     protected int[] xrange;
ingo@561:     protected int[] yrange;
ingo@561: 
ingo@1280:     protected Stack<ZoomObj> zoomStack;
ingo@1280:     protected double[]       zoom;
ingo@542: 
ingo@542: 
ingo@521:     /**
ingo@521:      * The default constructor to create a new ChartOutputTab.
ingo@521:      *
ingo@521:      * @param title The title of this tab.
ingo@521:      * @param collection The Collection which this chart belongs to.
ingo@521:      * @param mode The OutputMode.
felix@858:      * @param collectionView The shown collection.
ingo@521:      */
ingo@521:     public ChartOutputTab(
sascha@615:         String         title,
ingo@521:         Collection     collection,
ingo@521:         OutputMode     mode,
ingo@521:         CollectionView collectionView
ingo@521:     ){
ingo@521:         super(title, collection, mode);
ingo@521: 
ingo@538:         view      = collectionView;
ingo@521:         left      = new Canvas();
ingo@521:         right     = new Canvas();
ingo@561:         xrange    = new int[2];
ingo@561:         yrange    = new int[2];
ingo@561:         zoom      = new double[4];
ingo@1280:         zoomStack = new Stack<ZoomObj>();
ingo@521: 
ingo@521:         left.setBorder("1px solid black");
ingo@527:         left.setWidth(THEMEPANEL_MIN_WIDTH);
ingo@527:         left.setMinWidth(THEMEPANEL_MIN_WIDTH);
ingo@521:         right.setWidth("*");
ingo@521: 
ingo@521:         VLayout vLayout = new VLayout();
ingo@521:         vLayout.setMembersMargin(2);
ingo@521: 
ingo@521:         HLayout hLayout = new HLayout();
ingo@521:         hLayout.setWidth100();
ingo@521:         hLayout.setHeight100();
ingo@521:         hLayout.setMembersMargin(10);
ingo@521: 
ingo@521:         hLayout.addMember(left);
ingo@521:         hLayout.addMember(right);
ingo@521: 
felix@858:         // Output "cross_section" needs slightly modified ThemePanel
felix@858:         // (with action buttons).
felix@858:         if (mode.getName().equals("cross_section")) {
felix@858:             ctp = new CrossSectionChartThemePanel(collection, mode);
felix@858:         }
felix@858:         else {
felix@858:             ctp = new ChartThemePanel(collection, mode);
felix@858:         }
felix@858: 
felix@859:         ctp.addRedrawRequestHandler(this);
ingo@531:         ctp.addOutputParameterChangeHandler(this);
ingo@531: 
ingo@610:         chart = createChartImg();
ingo@610:         right.addChild(chart);
ingo@610:         right.setOverflow(Overflow.HIDDEN);
ingo@610:         //right.addChild(createChartPanel());
ingo@531:         left.addChild(ctp);
ingo@521: 
ingo@779:         tbarPanel = new ChartToolbar(collectionView, this);
ingo@521:         vLayout.addMember(tbarPanel);
ingo@521:         vLayout.addMember(hLayout);
ingo@521: 
ingo@521:         setPane(vLayout);
ingo@521: 
ingo@521:         right.addResizedHandler(this);
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@521:     /**
ingo@521:      * This method is called after the chart panel has resized. It removes the
ingo@521:      * chart - if existing - and requests a new one with adjusted size.
ingo@521:      *
ingo@521:      * @param event The resize event.
ingo@521:      */
ingo@521:     public void onResized(ResizedEvent event) {
ingo@531:         updateChartPanel();
ingo@561:         updateChartInfo();
ingo@531:     }
ingo@531: 
ingo@531: 
ingo@911:     public void onRedrawRequest(RedrawRequestEvent event) {
ingo@911:         if (event.getType() == Type.RESET) {
ingo@911:             resetRanges();
ingo@911:         }
ingo@911:         else {
ingo@911:             ctp.updateCollection();
ingo@911:             updateChartPanel();
ingo@911:             updateChartInfo();
ingo@911:         }
felix@858:     }
felix@858: 
felix@858: 
ingo@531:     /**
ingo@531:      * Listens to change event in the chart them panel and updates chart after
ingo@531:      * receiving such an event.
ingo@531:      *
ingo@531:      * @param event The OutputParameterChangeEvent.
ingo@531:      */
ingo@531:     public void onOutputParameterChanged(OutputParameterChangeEvent event) {
ingo@531:         updateChartPanel();
ingo@531:     }
ingo@531: 
ingo@531: 
ingo@538:     /**
ingo@541:      * Listens to zoom events and refreshes the current chart in such case.
ingo@541:      *
ingo@541:      * @param evt The ZoomEvent that stores the coordinates for zooming.
ingo@541:      */
ingo@541:     public void onZoom(ZoomEvent evt) {
ingo@1280:         zoomStack.push(new ZoomObj(zoom[0], zoom[1], zoom[2], zoom[3]));
ingo@1280: 
ingo@561:         xrange[0] = evt.getStartX();
ingo@561:         xrange[1] = evt.getEndX();
ingo@561:         yrange[0] = evt.getStartY();
ingo@561:         yrange[1] = evt.getEndY();
ingo@541: 
ingo@561:         xrange[0] = xrange[0] < xrange[1] ? xrange[0] : xrange[1];
ingo@561:         yrange[0] = yrange[0] < yrange[1] ? yrange[0] : yrange[1];
ingo@541: 
ingo@561:         translateCoordinates();
ingo@561: 
ingo@561:         updateChartInfo();
ingo@542:         updateChartPanel();
ingo@541:     }
ingo@541: 
ingo@541: 
ingo@561:     protected double[] translateCoordinates() {
ingo@561:         if (xrange == null || (xrange[0] == 0 && xrange[1] == 0)) {
ingo@561:             zoom[0] = 0d;
ingo@561:             zoom[1] = 1d;
ingo@561:         }
ingo@561:         else {
ingo@561:             translateXCoordinates();
ingo@561:         }
ingo@561: 
ingo@561:         if (yrange == null || (yrange[0] == 0 && yrange[1] == 0)) {
ingo@561:             zoom[2] = 0d;
ingo@561:             zoom[3] = 1d;
ingo@561:         }
ingo@561:         else {
ingo@561:             translateYCoordinates();
ingo@561:         }
ingo@561: 
ingo@561:         return zoom;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     protected void translateXCoordinates() {
ingo@561:         Axis xAxis = chartInfo.getXAxis(0);
ingo@561: 
ingo@561:         double xmin   = xAxis.getMin();
ingo@561:         double xmax   = xAxis.getMax();
ingo@561:         double xRange = xmax - xmin;
ingo@561: 
ingo@561:         Transform2D transformer = getTransformer(0);
ingo@561: 
ingo@561:         double[] start = transformer.transform(xrange[0], yrange[0]);
ingo@561:         double[] end   = transformer.transform(xrange[1], yrange[1]);
ingo@561: 
ingo@561:         zoom[0] = (start[0] - xmin) / xRange;
ingo@561:         zoom[1] = (end[0] - xmin) / xRange;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     protected void translateYCoordinates() {
ingo@561:         Axis yAxis = chartInfo.getYAxis(0);
ingo@561: 
ingo@561:         double ymin   = yAxis.getMin();
ingo@561:         double ymax   = yAxis.getMax();
ingo@561:         double yRange = ymax - ymin;
ingo@561: 
ingo@561:         Transform2D transformer = getTransformer(0);
ingo@561: 
ingo@561:         double[] start = transformer.transform(xrange[0], yrange[0]);
ingo@561:         double[] end   = transformer.transform(xrange[1], yrange[1]);
ingo@561: 
ingo@561:         zoom[2] = (start[1] - ymin) / yRange;
ingo@561:         zoom[3] = (end[1] - ymin) / yRange;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@552:     public void onPan(PanEvent event) {
ingo@561:         if (chartInfo == null) {
sascha@555:             return;
sascha@555:         }
ingo@561: 
ingo@552:         int[] start = event.getStartPos();
ingo@552:         int[] end   = event.getEndPos();
ingo@552: 
ingo@561:         Transform2D t = getTransformer();
ingo@552: 
ingo@561:         double[] ts = t.transform(start[0], start[1]);
ingo@561:         double[] tt = t.transform(end[0], end[1]);
ingo@552: 
ingo@561:         double diffX = ts[0] - tt[0];
ingo@561:         double diffY = ts[1] - tt[1];
ingo@561: 
ingo@552:         Axis xAxis = chartInfo.getXAxis(0);
ingo@552:         Axis yAxis = chartInfo.getYAxis(0);
ingo@552: 
ingo@561:         double[] x = panAxis(xAxis, diffX);
ingo@561:         double[] y = panAxis(yAxis, diffY);
ingo@552: 
ingo@561:         zoom[0] = x[0];
ingo@561:         zoom[1] = x[1];
ingo@561:         zoom[2] = y[0];
ingo@561:         zoom[3] = y[1];
ingo@561: 
ingo@561:         updateChartInfo();
ingo@552:         updateChartPanel();
ingo@552:     }
ingo@552: 
ingo@552: 
ingo@561:     protected double[] panAxis(Axis axis, double diff) {
ingo@561:         double min = axis.getFrom();
ingo@561:         double max = axis.getTo();
ingo@561: 
ingo@561:         min += diff;
ingo@561:         max += diff;
ingo@561: 
ingo@561:         return computeZoom(axis, min, max);
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@543:     public void resetRanges() {
ingo@1281:         zoomStack.push(new ZoomObj(zoom[0], zoom[1], zoom[2], zoom[3]));
ingo@1281: 
ingo@561:         zoom[0] = 0d;
ingo@561:         zoom[1] = 1d;
ingo@561:         zoom[2] = 0d;
ingo@561:         zoom[3] = 1d;
ingo@543: 
ingo@561:         updateChartInfo();
ingo@543:         updateChartPanel();
ingo@543:     }
ingo@543: 
ingo@543: 
ingo@541:     /**
ingo@1281:      * This method zooms the current chart out by a given <i>factor</i>.
ingo@1281:      *
ingo@1281:      * @param factor The factor should be between 0-100.
ingo@1281:      */
ingo@1281:     public void zoomOut(int factor) {
ingo@1281:         if (factor < 0 || factor > 100 || chartInfo == null) {
ingo@1281:             return;
ingo@1281:         }
ingo@1281: 
ingo@1281:         zoomStack.push(new ZoomObj(zoom[0], zoom[1], zoom[2], zoom[3]));
ingo@1281: 
ingo@1281:         Axis xAxis = chartInfo.getXAxis(0);
ingo@1281:         Axis yAxis = chartInfo.getYAxis(0);
ingo@1281: 
ingo@1281:         double[] x = zoomAxis(xAxis, factor);
ingo@1281:         double[] y = zoomAxis(yAxis, factor);
ingo@1281: 
ingo@1281:         zoom[0] = x[0];
ingo@1281:         zoom[1] = x[1];
ingo@1282:         zoom[2] = y[0];
ingo@1281:         zoom[3] = y[1];
ingo@1281: 
ingo@1281:         updateChartInfo();
ingo@1281:         updateChartPanel();
ingo@1281:     }
ingo@1281: 
ingo@1281: 
ingo@1281:     /**
ingo@1280:      * This method is used to zoom out. Zooming out is realizied with a stacked
ingo@1280:      * logic. Initially, you cannot zoom out. For each time you start a zoom-in
ingo@1280:      * action, the extent of the chart is stored and pushed onto a stack. A
ingo@1280:      * zoom-out will now lead you to the last extent that is poped from stack.
ingo@544:      *
ingo@544:      */
ingo@1280:     public void zoomOut() {
ingo@1280:         if (!zoomStack.empty()) {
ingo@1280:             zoom = zoomStack.pop().getZoom();
ingo@548: 
ingo@1280:             updateChartInfo();
ingo@1280:             updateChartPanel();
ingo@1280:         }
ingo@544:     }
ingo@544: 
ingo@544: 
ingo@561:     public double[] zoomAxis(Axis axis, int factor) {
ingo@1282:         GWT.log("Prepare Axis for zooming (factor: " + factor + ")");
ingo@561: 
ingo@1282:         double min   = axis.getMin();
ingo@1282:         double max   = axis.getMax();
ingo@1282:         double range = max > min ? max - min : min - max;
ingo@561: 
ingo@1282:         double curFrom = axis.getFrom();
ingo@1282:         double curTo   = axis.getTo();
ingo@561: 
ingo@1282:         double diff = curTo > curFrom ? curTo - curFrom : curFrom - curTo;
ingo@1282: 
ingo@1282:         GWT.log("    max from    : " + min);
ingo@1282:         GWT.log("    max to      : " + max);
ingo@1282:         GWT.log("    max range   : " + range);
ingo@1282:         GWT.log("    current from: " + curFrom);
ingo@1282:         GWT.log("    current to  : " + curTo);
ingo@1282:         GWT.log("    current diff: " + diff);
ingo@1282: 
ingo@1282:         double newFrom = curFrom - (diff * factor / 100);
ingo@1282:         double newTo   = curTo + (diff * factor / 100);
ingo@1282: 
ingo@1282:         GWT.log("    new from: " + newFrom);
ingo@1282:         GWT.log("    new to  : " + newTo);
ingo@1282: 
ingo@1282:         return new double[] {
ingo@1282:             (newFrom - min) / range,
ingo@1282:             (newTo - min) / range
ingo@1282:         };
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     public static double[] computeZoom(Axis axis, double min, double max) {
ingo@561:         double[] zoom = new double[2];
ingo@561: 
ingo@561:         double absMin = axis.getMin();
ingo@561:         double absMax = axis.getMax();
ingo@561:         double diff   = absMax > absMin ? absMax - absMin : absMin - absMax;
ingo@561: 
ingo@561:         zoom[0] = (min - absMin) / diff;
ingo@561:         zoom[1] = (max - absMin) / diff;
ingo@561: 
ingo@561:         return zoom;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@544:     /**
ingo@538:      * Updates the Transform2D object using the chart info service.
ingo@538:      */
ingo@561:     public void updateChartInfo() {
ingo@538:         Config config = Config.getInstance();
ingo@538:         String url    = config.getServerUrl();
ingo@538:         String locale = config.getLocale();
ingo@538: 
ingo@538:         info.getChartInfo(
ingo@538:             view.getCollection(),
ingo@538:             url,
ingo@538:             locale,
ingo@538:             mode.getName(),
ingo@549:             getChartAttributes(),
ingo@552:             new AsyncCallback<ChartInfo>() {
ingo@538:                 public void onFailure(Throwable caught) {
ingo@610:                     GWT.log("ChartInfo ERROR: " + caught.getMessage());
ingo@538:                 }
ingo@538: 
ingo@552:                 public void onSuccess(ChartInfo chartInfo) {
ingo@552:                     setChartInfo(chartInfo);
ingo@538:                 }
ingo@538:             });
ingo@538:     }
ingo@538: 
ingo@538: 
ingo@531:     public void updateChartPanel() {
ingo@610:         int w = right.getWidth();
ingo@610:         int h = right.getHeight();
ingo@521: 
ingo@610:         chart.setSrc(getImgUrl(w, h));
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@542:     /**
ingo@542:      * Returns the existing chart panel.
ingo@542:      *
ingo@542:      * @return the existing chart panel.
ingo@542:      */
ingo@534:     public Canvas getChartPanel() {
ingo@610:         return right;
ingo@610:     }
ingo@538: 
ingo@538: 
ingo@610:     public Canvas getChartImg() {
ingo@610:         return chart;
ingo@538:     }
ingo@538: 
ingo@538: 
ingo@552:     public ChartInfo getChartInfo() {
ingo@552:         return chartInfo;
ingo@552:     }
ingo@552: 
ingo@552: 
ingo@552:     protected void setChartInfo(ChartInfo chartInfo) {
ingo@552:         this.chartInfo = chartInfo;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     public Transform2D getTransformer() {
ingo@561:         if (chartInfo == null) {
ingo@561:             return null;
ingo@561:         }
ingo@561: 
ingo@561:         return chartInfo.getTransformer(0);
ingo@552:     }
ingo@552: 
ingo@552: 
ingo@538:     /**
ingo@538:      * Returns the Transform2D object used to transform image coordinates into
ingo@538:      * chart coordinates.
ingo@538:      *
ingo@561:      * @param pos The index of a specific transformer.
ingo@561:      *
ingo@538:      * @return the Transform2D object.
ingo@538:      */
ingo@561:     public Transform2D getTransformer(int pos) {
ingo@561:         if (chartInfo == null) {
ingo@561:             return null;
ingo@561:         }
ingo@538: 
ingo@561:         return chartInfo.getTransformer(pos);
ingo@534:     }
ingo@534: 
ingo@534: 
ingo@542:     /**
ingo@542:      * Creates a new chart panel with default size.
ingo@542:      *
ingo@542:      * @return the created chart panel.
ingo@542:      */
ingo@610:     protected Img createChartImg() {
ingo@610:         return createChartImg(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT);
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@542:     /**
ingo@542:      * Creates a new chart panel with specified width and height.
ingo@542:      *
ingo@542:      * @param width The width for the chart panel.
ingo@542:      * @param height The height for the chart panel.
ingo@542:      *
ingo@542:      * @return the created chart panel.
ingo@542:      */
ingo@610:     protected Img createChartImg(int width, int height) {
ingo@521:         Img chart  = getChartImg(width, height);
ingo@521:         chart.setWidth100();
ingo@521:         chart.setHeight100();
ingo@521: 
ingo@521:         return chart;
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@521:     /**
ingo@521:      * Builds the chart image and returns it.
ingo@521:      *
ingo@521:      * @param width The chart width.
ingo@521:      * @param height The chart height.
ingo@521:      *
ingo@521:      * @return the chart image.
ingo@521:      */
ingo@521:     protected Img getChartImg(int width, int height) {
ingo@521:         return new Img(getImgUrl(width, height));
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@521:     /**
ingo@521:      * Builds the URL that points to the chart image.
ingo@521:      *
ingo@521:      * @param width The width of the requested chart.
ingo@521:      * @param height The height of the requested chart.
ingo@542:      * @param xr Optional x range (used for zooming).
ingo@542:      * @param yr Optional y range (used for zooming).
ingo@521:      *
ingo@521:      * @return the URL to the chart image.
ingo@521:      */
ingo@521:     protected String getImgUrl(int width, int height) {
ingo@521:         Config config = Config.getInstance();
ingo@521: 
ingo@521:         String imgUrl = GWT.getModuleBaseURL();
ingo@521:         imgUrl += "chart";
ingo@521:         imgUrl += "?uuid=" + collection.identifier();
ingo@521:         imgUrl += "&type=" + mode.getName();
ingo@521:         imgUrl += "&server=" + config.getServerUrl();
ingo@521:         imgUrl += "&locale=" + config.getLocale();
ingo@521:         imgUrl += "&timestamp=" + new Date().getTime();
ingo@521:         imgUrl += "&width=" + Integer.toString(width);
ingo@521:         imgUrl += "&height=" + Integer.toString(height);
ingo@521: 
ingo@561:         double[] zoom = getZoomValues();
ingo@542: 
ingo@561:         if (zoom != null) {
ingo@612:             if (zoom[0] != 0 || zoom[1] != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@612:                 imgUrl += "&minx=" + Double.toString(zoom[0]);
ingo@612:                 imgUrl += "&maxx=" + Double.toString(zoom[1]);
ingo@612:             }
ingo@612:             if (zoom[2] != 0 || zoom[3] != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@612:                 imgUrl += "&miny=" + Double.toString(zoom[2]);
ingo@612:                 imgUrl += "&maxy=" + Double.toString(zoom[3]);
ingo@612:             }
ingo@542:         }
ingo@542: 
ingo@521:         return imgUrl;
ingo@521:     }
ingo@549: 
ingo@549: 
ingo@549:     public Map getChartAttributes() {
ingo@549:         Map<String, String> attr = new HashMap<String, String>();
ingo@549: 
ingo@549:         Canvas chart = getChartPanel();
ingo@549:         attr.put("width", chart.getWidth().toString());
ingo@549:         attr.put("height", chart.getHeight().toString());
ingo@549: 
ingo@561:         double[] zoom = getZoomValues();
ingo@549: 
ingo@561:         if (zoom != null) {
ingo@612:             if (zoom[0] != 0 || zoom[1] != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@612:                 attr.put("minx", Double.toString(zoom[0]));
ingo@612:                 attr.put("maxx", Double.toString(zoom[1]));
ingo@612:             }
ingo@612:             if (zoom[2] != 0 || zoom[3] != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@612:                 attr.put("miny", Double.toString(zoom[2]));
ingo@612:                 attr.put("maxy", Double.toString(zoom[3]));
ingo@612:             }
ingo@549:         }
ingo@549: 
ingo@549:         return attr;
ingo@549:     }
ingo@561: 
ingo@561: 
ingo@561:     protected double[] getZoomValues() {
ingo@561:         return zoom;
ingo@561:     }
ingo@521: }
ingo@521: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :