org.jfree.chart.fx.ChartCanvas Java Examples

/**
 * Handles a mouse pressed event by recording the initial mouse pointer
 * location.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
@Override
public void handleMousePressed(ChartCanvas canvas, MouseEvent e) {
    Plot plot = canvas.getChart().getPlot();
    if (!(plot instanceof Pannable)) {
        canvas.clearLiveHandler();
        return;
    }
    Pannable pannable = (Pannable) plot;
    if (pannable.isDomainPannable() || pannable.isRangePannable()) {
        Point2D point = new Point2D.Double(e.getX(), e.getY());
        Rectangle2D dataArea = canvas.findDataArea(point);
        if (dataArea != null && dataArea.contains(point)) {
            this.panW = dataArea.getWidth();
            this.panH = dataArea.getHeight();
            this.panLast = point;
            canvas.setCursor(javafx.scene.Cursor.MOVE);
        }
    }
    // the actual panning occurs later in the mouseDragged() method
}
 

/**
 * 
 * @param canvas the canvas ({@code null} not permitted).
 * @param e the event ({@code null} not permitted).
 */
@Override
public void handleMouseReleased(ChartCanvas chartPanel, MouseEvent eOrig) {
  if (gestureHandlers == null || gestureHandlers.isEmpty() || !listensFor(Event.RELEASED))
    return;

  MouseEventWrapper e = new MouseEventWrapper(eOrig);
  ChartEntity entity = findChartEntity(e);
  ChartGesture.Entity gestureEntity = ChartGesture.getGestureEntity(entity);
  Button button = Button.getButton(e.getButton());

  // last gesture was dragged? keep the same chartEntity
  if (lastDragEvent != null) {
    entity = lastDragEvent.getEntity();
    gestureEntity = lastDragEvent.getGesture().getEntity();
  }
  // handle event
  handleEvent(new ChartGestureEvent(cw, e, entity,
      new ChartGesture(gestureEntity, Event.RELEASED, button)));

  // reset drag
  lastDragEvent = null;
}
 

/**
 * Returns the tooltip text.
 * 
 * @param canvas  the canvas that is displaying the chart.
 * @param x  the x-coordinate of the mouse pointer.
 * @param y  the y-coordinate of the mouse pointer.
 * 
 * @return String The tooltip text (possibly <code>null</code>).
  */
private String getTooltipText(ChartCanvas canvas, double x, double y) {
    ChartRenderingInfo info = canvas.getRenderingInfo();
    if (info == null) {
        return null;
    }
    EntityCollection entities = info.getEntityCollection();
    if (entities == null) {
        return null;
    }
    ChartEntity entity = entities.getEntity(x, y);
    if (entity == null) {
        return null;
    }
    return entity.getToolTipText();
}
 

/**
 * Find chartentities like JFreeChartEntity, AxisEntity, PlotEntity, TitleEntity, XY...
 * 
 * @param chart
 * @return
 */
public static ChartEntity findChartEntity(ChartCanvas chart, double mx, double my) {
  // TODO check if insets were needed
  // coordinates to find chart entities
  int x = (int) (mx / chart.getScaleX());
  int y = (int) (my / chart.getScaleY());

  ChartRenderingInfo info = chart.getRenderingInfo();
  ChartEntity entity = null;
  if (info != null) {
    EntityCollection entities = info.getEntityCollection();
    if (entities != null) {
      entity = entities.getEntity(x, y);
    }
  }
  return entity;
}
 

/**
 * 
 * @param canvas the canvas ({@code null} not permitted).
 * @param e the event ({@code null} not permitted).
 */
@Override
public void handleMouseReleased(ChartCanvas chartPanel, MouseEvent eOrig) {
  if (gestureHandlers == null || gestureHandlers.isEmpty() || !listensFor(Event.RELEASED))
    return;

  MouseEventWrapper e = new MouseEventWrapper(eOrig);
  ChartEntity entity = findChartEntity(e);
  ChartGesture.Entity gestureEntity = ChartGesture.getGestureEntity(entity);
  Button button = Button.getButton(e.getButton());

  // last gesture was dragged? keep the same chartEntity
  if (lastDragEvent != null) {
    entity = lastDragEvent.getEntity();
    gestureEntity = lastDragEvent.getGesture().getEntity();
  }
  // handle event
  handleEvent(new ChartGestureEvent(cw, e, entity,
      new ChartGesture(gestureEntity, Event.RELEASED, button)));

  // reset drag
  lastDragEvent = null;
}
 

/**
 * Handle the case where a plot implements the {@link Zoomable} interface.
 *
 * @param zoomable  the zoomable plot.
 * @param e  the mouse wheel event.
 */
private void handleZoomable(ChartCanvas canvas, Zoomable zoomable, 
        ScrollEvent e) {
    // don't zoom unless the mouse pointer is in the plot's data area
    ChartRenderingInfo info = canvas.getRenderingInfo();
    PlotRenderingInfo pinfo = info.getPlotInfo();
    Point2D p = new Point2D.Double(e.getX(), e.getY());
    if (pinfo.getDataArea().contains(p)) {
        Plot plot = (Plot) zoomable;
        // do not notify while zooming each axis
        boolean notifyState = plot.isNotify();
        plot.setNotify(false);
        int clicks = (int) e.getDeltaY();
        double zf = 1.0 + this.zoomFactor;
        if (clicks < 0) {
            zf = 1.0 / zf;
        }
        if (true) { //this.chartPanel.isDomainZoomable()) {
            zoomable.zoomDomainAxes(zf, pinfo, p, true);
        }
        if (true) { //this.chartPanel.isRangeZoomable()) {
            zoomable.zoomRangeAxes(zf, pinfo, p, true);
        }
        plot.setNotify(notifyState);  // this generates the change event too
    } 
}
 

/**
 * Handles a mouse pressed event by recording the initial mouse pointer
 * location.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
@Override
public void handleMousePressed(ChartCanvas canvas, MouseEvent e) {
    Plot plot = canvas.getChart().getPlot();
    if (!(plot instanceof Pannable)) {
        canvas.clearLiveHandler();
        return;
    }
    Pannable pannable = (Pannable) plot;
    if (pannable.isDomainPannable() || pannable.isRangePannable()) {
        Point2D point = new Point2D.Double(e.getX(), e.getY());
        Rectangle2D dataArea = canvas.findDataArea(point);
        if (dataArea != null && dataArea.contains(point)) {
            this.panW = dataArea.getWidth();
            this.panH = dataArea.getHeight();
            this.panLast = point;
            canvas.setCursor(javafx.scene.Cursor.MOVE);
        }
    }
    // the actual panning occurs later in the mouseDragged() method
}
 

/**
 * Handle the case where a plot implements the {@link Zoomable} interface.
 *
 * @param zoomable  the zoomable plot.
 * @param e  the mouse wheel event.
 */
private void handleZoomable(ChartCanvas canvas, Zoomable zoomable, 
        ScrollEvent e) {
    // don't zoom unless the mouse pointer is in the plot's data area
    ChartRenderingInfo info = canvas.getRenderingInfo();
    PlotRenderingInfo pinfo = info.getPlotInfo();
    Point2D p = new Point2D.Double(e.getX(), e.getY());
    if (pinfo.getDataArea().contains(p)) {
        Plot plot = (Plot) zoomable;
        // do not notify while zooming each axis
        boolean notifyState = plot.isNotify();
        plot.setNotify(false);
        int clicks = (int) e.getDeltaY();
        double zf = 1.0 + this.zoomFactor;
        if (clicks < 0) {
            zf = 1.0 / zf;
        }
        if (true) { //this.chartPanel.isDomainZoomable()) {
            zoomable.zoomDomainAxes(zf, pinfo, p, true);
        }
        if (true) { //this.chartPanel.isRangeZoomable()) {
            zoomable.zoomRangeAxes(zf, pinfo, p, true);
        }
        plot.setNotify(notifyState);  // this generates the change event too
    } 
}
 

/**
 * Handles a mouse dragged event. This implementation does nothing, override the method if
 * required.
 * 
 * @param canvas the canvas ({@code null} not permitted).
 * @param e the event ({@code null} not permitted).
 */
@Override
public void handleMouseDragged(ChartCanvas chartPanel, MouseEvent eOrig) {
  if (gestureHandlers == null || gestureHandlers.isEmpty() || !listensFor(Event.DRAGGED))
    return;

  MouseEventWrapper e = new MouseEventWrapper(eOrig);
  // keep the same chartEntity
  ChartEntity entity = lastDragEvent.getEntity();
  ChartGesture.Entity gestureEntity = lastDragEvent.getGesture().getEntity();
  Button button = lastDragEvent.getGesture().getButton();

  // handle event
  lastDragEvent = new ChartGestureEvent(cw, e, entity,
      new ChartGesture(gestureEntity, Event.DRAGGED, button));
  handleEvent(lastDragEvent);
}
 

/**
 * Find chartentities like JFreeChartEntity, AxisEntity, PlotEntity, TitleEntity, XY...
 * 
 * @param chart
 * @return
 */
public static ChartEntity findChartEntity(ChartCanvas chart, double mx, double my) {
  // TODO check if insets were needed
  // coordinates to find chart entities
  int x = (int) (mx / chart.getScaleX());
  int y = (int) (my / chart.getScaleY());

  ChartRenderingInfo info = chart.getRenderingInfo();
  ChartEntity entity = null;
  if (info != null) {
    EntityCollection entities = info.getEntityCollection();
    if (entities != null) {
      entity = entities.getEntity(x, y);
    }
  }
  return entity;
}
 

@Override
public void handleScroll(ChartCanvas canvas, ScrollEvent e) {
    JFreeChart chart = canvas.getChart();
    if (chart == null) {
        return;
    }
    Plot plot = chart.getPlot();
    if (plot instanceof Zoomable) {
        Zoomable zoomable = (Zoomable) plot;
        handleZoomable(canvas, zoomable, e);
    }
    else if (plot instanceof PiePlot) {
        PiePlot pp = (PiePlot) plot;
        pp.handleMouseWheelRotation((int) e.getDeltaY());
    }
}
 

/**
 * Handle the case where a plot implements the {@link Zoomable} interface.
 *
 * @param zoomable  the zoomable plot.
 * @param e  the mouse wheel event.
 */
private void handleZoomable(ChartCanvas canvas, Zoomable zoomable, 
        ScrollEvent e) {
    // don't zoom unless the mouse pointer is in the plot's data area
    ChartRenderingInfo info = canvas.getRenderingInfo();
    PlotRenderingInfo pinfo = info.getPlotInfo();
    Point2D p = new Point2D.Double(e.getX(), e.getY());
    if (pinfo.getDataArea().contains(p)) {
        Plot plot = (Plot) zoomable;
        // do not notify while zooming each axis
        boolean notifyState = plot.isNotify();
        plot.setNotify(false);
        int clicks = (int) e.getDeltaY();
        double zf = 1.0 + this.zoomFactor;
        if (clicks < 0) {
            zf = 1.0 / zf;
        }
        if (true) { //this.chartPanel.isDomainZoomable()) {
            zoomable.zoomDomainAxes(zf, pinfo, p, true);
        }
        if (true) { //this.chartPanel.isRangeZoomable()) {
            zoomable.zoomRangeAxes(zf, pinfo, p, true);
        }
        plot.setNotify(notifyState);  // this generates the change event too
    } 
}
 

/**
 * Returns the tooltip text.
 * 
 * @param canvas  the canvas that is displaying the chart.
 * @param x  the x-coordinate of the mouse pointer.
 * @param y  the y-coordinate of the mouse pointer.
 * 
 * @return String The tooltip text (possibly {@code null}).
  */
private String getTooltipText(ChartCanvas canvas, double x, double y) {
    ChartRenderingInfo info = canvas.getRenderingInfo();
    if (info == null) {
        return null;
    }
    EntityCollection entities = info.getEntityCollection();
    if (entities == null) {
        return null;
    }
    ChartEntity entity = entities.getEntity(x, y);
    if (entity == null) {
        return null;
    }
    return entity.getToolTipText();
}
 

/**
 * Handles a mouse moved event. This implementation does nothing, override the method if required.
 * 
 * @param canvas the canvas ({@code null} not permitted).
 * @param e the event ({@code null} not permitted).
 */
@Override
public void handleMouseMoved(ChartCanvas chartPanel, MouseEvent eOrig) {
  if (gestureHandlers == null || gestureHandlers.isEmpty() || !listensFor(Event.MOVED))
    return;

  MouseEventWrapper e = new MouseEventWrapper(eOrig);
  ChartViewWrapper cw = new ChartViewWrapper(chartViewer);
  ChartEntity entity = findChartEntity(e);
  ChartGesture.Entity gestureEntity = ChartGesture.getGestureEntity(entity);
  GestureButton button = GestureButton.getButton(e.getButton());

  // handle event
  handleEvent(
      new ChartGestureEvent(cw, e, entity, new ChartGesture(gestureEntity, Event.MOVED, button)));
}
 

/**
 * Handles a mouse moved event. This implementation does nothing, override the method if required.
 * 
 * @param canvas the canvas ({@code null} not permitted).
 * @param e the event ({@code null} not permitted).
 */
@Override
public void handleMouseMoved(ChartCanvas chartPanel, MouseEvent eOrig) {
  if (gestureHandlers == null || gestureHandlers.isEmpty() || !listensFor(Event.MOVED))
    return;

  MouseEventWrapper e = new MouseEventWrapper(eOrig);
  ChartViewWrapper cw = new ChartViewWrapper(chartViewer);
  ChartEntity entity = findChartEntity(e);
  ChartGesture.Entity gestureEntity = ChartGesture.getGestureEntity(entity);
  Button button = Button.getButton(e.getButton());

  // handle event
  handleEvent(
      new ChartGestureEvent(cw, e, entity, new ChartGesture(gestureEntity, Event.MOVED, button)));
}
 

/**
 * 
 * @param canvas the canvas ({@code null} not permitted).
 * @param e the event ({@code null} not permitted).
 */
@Override
public void handleMouseReleased(ChartCanvas chartPanel, MouseEvent eOrig) {
  if (gestureHandlers == null || gestureHandlers.isEmpty() || !listensFor(Event.RELEASED))
    return;

  MouseEventWrapper e = new MouseEventWrapper(eOrig);
  ChartEntity entity = findChartEntity(e);
  ChartGesture.Entity gestureEntity = ChartGesture.getGestureEntity(entity);
  GestureButton button = GestureButton.getButton(e.getButton());

  // last gesture was dragged? keep the same chartEntity
  if (lastDragEvent != null) {
    entity = lastDragEvent.getEntity();
    gestureEntity = lastDragEvent.getGesture().getEntity();
  }
  // handle event
  handleEvent(new ChartGestureEvent(cw, e, entity,
      new ChartGesture(gestureEntity, Event.RELEASED, button)));

  // reset drag
  lastDragEvent = null;
}
 

/**
 * Handles a mouse pressed event by recording the initial mouse pointer
 * location.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
@Override
public void handleMousePressed(ChartCanvas canvas, MouseEvent e) {
    Plot plot = canvas.getChart().getPlot();
    if (!(plot instanceof Pannable)) {
        canvas.clearLiveHandler();
        return;
    }
    Pannable pannable = (Pannable) plot;
    if (pannable.isDomainPannable() || pannable.isRangePannable()) {
        Point2D point = new Point2D.Double(e.getX(), e.getY());
        Rectangle2D dataArea = canvas.findDataArea(point);
        if (dataArea != null && dataArea.contains(point)) {
            this.panW = dataArea.getWidth();
            this.panH = dataArea.getHeight();
            this.panLast = point;
            canvas.setCursor(javafx.scene.Cursor.MOVE);
        }
    }
    // the actual panning occurs later in the mouseDragged() method
}
 

/**
 * Returns the tooltip text.
 * 
 * @param canvas  the canvas that is displaying the chart.
 * @param x  the x-coordinate of the mouse pointer.
 * @param y  the y-coordinate of the mouse pointer.
 * 
 * @return String The tooltip text (possibly <code>null</code>).
  */
private String getTooltipText(ChartCanvas canvas, double x, double y) {
    ChartRenderingInfo info = canvas.getRenderingInfo();
    if (info == null) {
        return null;
    }
    EntityCollection entities = info.getEntityCollection();
    if (entities == null) {
        return null;
    }
    ChartEntity entity = entities.getEntity(x, y);
    if (entity == null) {
        return null;
    }
    return entity.getToolTipText();
}
 

/**
 * Handles a mouse pressed event by recording the initial mouse pointer
 * location.
 * 
 * @param canvas  the JavaFX canvas ({@code null} not permitted).
 * @param e  the mouse event ({@code null} not permitted).
 */
@Override
public void handleMousePressed(ChartCanvas canvas, MouseEvent e) {
	if (canvas.getChart() == null) {
		return;
	}
    Plot plot = canvas.getChart().getPlot();
    if (!(plot instanceof Pannable)) {
        canvas.clearLiveHandler();
        return;
    }
    Pannable pannable = (Pannable) plot;
    if (pannable.isDomainPannable() || pannable.isRangePannable()) {
        Point2D point = new Point2D.Double(e.getX(), e.getY());
        Rectangle2D dataArea = canvas.findDataArea(point);
        if (dataArea != null && dataArea.contains(point)) {
            this.panW = dataArea.getWidth();
            this.panH = dataArea.getHeight();
            this.panLast = point;
            canvas.setCursor(javafx.scene.Cursor.MOVE);
        }
    }
    // the actual panning occurs later in the mouseDragged() method
}
 

public void handleMouseReleased(ChartCanvas canvas, MouseEvent e) {  
    //if we have been panning reset the cursor
    //unregister in any case
    if (this.panLast != null) {
        canvas.setCursor(javafx.scene.Cursor.DEFAULT);
    }
    this.panLast = null;
    canvas.clearLiveHandler();
}
 

/**
 * Handles a mouse clicked event by setting the anchor point for the
 * canvas and redrawing the chart (the anchor point is a reference point
 * used by the chart to determine crosshair lines).
 * 
 * @param canvas  the chart canvas ({@code null} not permitted).
 * @param e  the mouse event ({@code null} not permitted).
 */
@Override
public void handleMouseClicked(ChartCanvas canvas, MouseEvent e) {
    if (this.mousePressedPoint == null || canvas.getChart() == null) {
        return;
    }
    double x = e.getX();
    double y = e.getY();
    ChartEntity entity = canvas.getRenderingInfo().getEntityCollection().getEntity(x, y);
    ChartMouseEventFX event = new ChartMouseEventFX(canvas.getChart(), e, entity);
    for (ChartMouseListenerFX listener : canvas.getChartMouseListeners()) {
        listener.chartMouseClicked(event);
    }
}
 

/**
 * Handles a mouse clicked event by setting the anchor point for the
 * canvas and redrawing the chart (the anchor point is a reference point
 * used by the chart to determine crosshair lines).
 * 
 * @param canvas  the chart canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
@Override
public void handleMouseClicked(ChartCanvas canvas, MouseEvent e) {
    if (this.mousePressedPoint == null) {
        return;
    }
    Point2D currPt = new Point2D.Double(e.getX(), e.getY());
    if (this.mousePressedPoint.distance(currPt) < 2) {
        canvas.setAnchor(currPt);
    }
    this.mousePressedPoint = null;
}
 

/**
 * Handles a mouse dragged event by calculating the distance panned and
 * updating the axes accordingly.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
public void handleMouseDragged(ChartCanvas canvas, MouseEvent e) {
    if (this.panLast == null) {
        //handle panning if we have a start point else unregister
        canvas.clearLiveHandler();
        return;
    }

    JFreeChart chart = canvas.getChart();
    double dx = e.getX() - this.panLast.getX();
    double dy = e.getY() - this.panLast.getY();
    if (dx == 0.0 && dy == 0.0) {
        return;
    }
    double wPercent = -dx / this.panW;
    double hPercent = dy / this.panH;
    boolean old = chart.getPlot().isNotify();
    chart.getPlot().setNotify(false);
    Pannable p = (Pannable) chart.getPlot();
    PlotRenderingInfo info = canvas.getRenderingInfo().getPlotInfo();
    if (p.getOrientation().isVertical()) {
        p.panDomainAxes(wPercent, info, this.panLast);
        p.panRangeAxes(hPercent, info, this.panLast);
    }
    else {
        p.panDomainAxes(hPercent, info, this.panLast);
        p.panRangeAxes(wPercent, info, this.panLast);
    }
    this.panLast = new Point2D.Double(e.getX(), e.getY());
    chart.getPlot().setNotify(old);
}
 

/**
 * Handles a mouse dragged event by calculating the distance panned and
 * updating the axes accordingly.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
public void handleMouseDragged(ChartCanvas canvas, MouseEvent e) {
    if (this.panLast == null) {
        //handle panning if we have a start point else unregister
        canvas.clearLiveHandler();
        return;
    }

    JFreeChart chart = canvas.getChart();
    double dx = e.getX() - this.panLast.getX();
    double dy = e.getY() - this.panLast.getY();
    if (dx == 0.0 && dy == 0.0) {
        return;
    }
    double wPercent = -dx / this.panW;
    double hPercent = dy / this.panH;
    boolean old = chart.getPlot().isNotify();
    chart.getPlot().setNotify(false);
    Pannable p = (Pannable) chart.getPlot();
    PlotRenderingInfo info = canvas.getRenderingInfo().getPlotInfo();
    if (p.getOrientation().isVertical()) {
        p.panDomainAxes(wPercent, info, this.panLast);
        p.panRangeAxes(hPercent, info, this.panLast);
    }
    else {
        p.panDomainAxes(hPercent, info, this.panLast);
        p.panRangeAxes(wPercent, info, this.panLast);
    }
    this.panLast = new Point2D.Double(e.getX(), e.getY());
    chart.getPlot().setNotify(old);
}
 

/**
 * Handles a mouse pressed event by recording the initial mouse pointer
 * location.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
@Override
public void handleMousePressed(ChartCanvas canvas, MouseEvent e) {
    Point2D pt = new Point2D.Double(e.getX(), e.getY());
    Rectangle2D dataArea = canvas.findDataArea(pt);
    if (dataArea != null) {
        this.startPoint = ShapeUtilities.getPointInRectangle(e.getX(),
                e.getY(), dataArea);
    } else {
        this.startPoint = null;
        canvas.clearLiveHandler();
    }
}
 

/**
 * Handles a mouse dragged event by calculating the distance panned and
 * updating the axes accordingly.
 * 
 * @param canvas  the JavaFX canvas (<code>null</code> not permitted).
 * @param e  the mouse event (<code>null</code> not permitted).
 */
public void handleMouseDragged(ChartCanvas canvas, MouseEvent e) {
    if (this.panLast == null) {
        //handle panning if we have a start point else unregister
        canvas.clearLiveHandler();
        return;
    }

    JFreeChart chart = canvas.getChart();
    double dx = e.getX() - this.panLast.getX();
    double dy = e.getY() - this.panLast.getY();
    if (dx == 0.0 && dy == 0.0) {
        return;
    }
    double wPercent = -dx / this.panW;
    double hPercent = dy / this.panH;
    boolean old = chart.getPlot().isNotify();
    chart.getPlot().setNotify(false);
    Pannable p = (Pannable) chart.getPlot();
    PlotRenderingInfo info = canvas.getRenderingInfo().getPlotInfo();
    if (p.getOrientation().isVertical()) {
        p.panDomainAxes(wPercent, info, this.panLast);
        p.panRangeAxes(hPercent, info, this.panLast);
    }
    else {
        p.panDomainAxes(hPercent, info, this.panLast);
        p.panRangeAxes(wPercent, info, this.panLast);
    }
    this.panLast = new Point2D.Double(e.getX(), e.getY());
    chart.getPlot().setNotify(old);
}
 

/**
 * Handles a mouse moved event by updating the tooltip.
 * 
 * @param canvas  the chart canvas ({@code null} not permitted).
 * @param e  the mouse event.
 */
@Override
public void handleMouseMoved(ChartCanvas canvas, MouseEvent e) {
    if (canvas.getChart() == null || !canvas.isTooltipEnabled()) {
        return;
    }
    String text = getTooltipText(canvas, e.getX(), e.getY());
    canvas.setTooltip(text, e.getScreenX(), e.getScreenY());
}
 

@Override
public void handleScroll(ChartCanvas canvas, ScrollEvent e) {
    JFreeChart chart = canvas.getChart();
    Plot plot = chart.getPlot();
    if (plot instanceof Zoomable) {
        Zoomable zoomable = (Zoomable) plot;
        handleZoomable(canvas, zoomable, e);
    }
    else if (plot instanceof PiePlot) {
        PiePlot pp = (PiePlot) plot;
        pp.handleMouseWheelRotation((int) e.getDeltaY());
    }
}
 

@Override
public void handleMouseReleased(ChartCanvas canvas, MouseEvent e) {  
    //if we have been panning reset the cursor
    //unregister in any case
    if (this.panLast != null) {
        canvas.setCursor(javafx.scene.Cursor.DEFAULT);
    }
    this.panLast = null;
    canvas.clearLiveHandler();
}
 

@Override
public void handleScroll(ChartCanvas canvas, ScrollEvent e) {
    JFreeChart chart = canvas.getChart();
    Plot plot = chart.getPlot();
    if (plot instanceof Zoomable) {
        Zoomable zoomable = (Zoomable) plot;
        handleZoomable(canvas, zoomable, e);
    }
    else if (plot instanceof PiePlot) {
        PiePlot pp = (PiePlot) plot;
        pp.handleMouseWheelRotation((int) e.getDeltaY());
    }
}