Example usage for java.awt.geom Rectangle2D getCenterX

Introduction

In this page you can find the example usage for java.awt.geom Rectangle2D getCenterX.

Prototype

public double getCenterX() 

Source Link

Document

Returns the X coordinate of the center of the framing rectangle of the Shape in double precision.

Usage

From source file:net.sf.fspdfs.chartthemes.spring.ScaledDialPointer.java

/**
 * Draws the pointer.//from  w w w .j  av a2s .c o m
 *
 * @param g2  the graphics target.
 * @param plot  the plot.
 * @param frame  the dial's reference frame.
 * @param view  the dial's view.
 */
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    g2.setStroke(new BasicStroke(1.0f));
    Rectangle2D lengthRect = DialPlot.rectangleByRadius(frame, this.getRadius(), this.getRadius());
    Rectangle2D widthRect = DialPlot.rectangleByRadius(frame, this.getWidthRadius(), this.getWidthRadius());
    double value = ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale);
    DialScale scale = plot.getScaleForDataset(this.getDatasetIndex());
    double angle = scale.valueToAngle(value);

    Arc2D arc1 = new Arc2D.Double(lengthRect, angle, 0, Arc2D.OPEN);
    Point2D pt1 = arc1.getEndPoint();
    Arc2D arc2 = new Arc2D.Double(widthRect, angle - 90.0, 180.0, Arc2D.OPEN);
    Point2D pt2 = arc2.getStartPoint();
    Point2D pt3 = arc2.getEndPoint();
    Arc2D arc3 = new Arc2D.Double(widthRect, angle - 180.0, 0.0, Arc2D.OPEN);
    Point2D pt4 = arc3.getStartPoint();

    GeneralPath gp = new GeneralPath();
    gp.moveTo((float) pt1.getX(), (float) pt1.getY());
    gp.lineTo((float) pt2.getX(), (float) pt2.getY());
    gp.lineTo((float) pt4.getX(), (float) pt4.getY());
    gp.lineTo((float) pt3.getX(), (float) pt3.getY());
    gp.closePath();
    g2.setPaint(this.fillPaint);
    g2.fill(gp);

    g2.setPaint(this.getOutlinePaint());
    Line2D line = new Line2D.Double(frame.getCenterX(), frame.getCenterY(), pt1.getX(), pt1.getY());
    //      g2.draw(line);

    line.setLine(pt2, pt3);
    g2.draw(line);

    line.setLine(pt3, pt1);
    g2.draw(line);

    line.setLine(pt2, pt1);
    g2.draw(line);

    line.setLine(pt2, pt4);
    g2.draw(line);

    line.setLine(pt3, pt4);
    g2.draw(line);
}

---

From source file:net.sf.jasperreports.chartthemes.spring.ScaledDialPointer.java

/**
 * Draws the pointer.//  ww  w .ja v a 2 s . c  om
 *
 * @param g2  the graphics target.
 * @param plot  the plot.
 * @param frame  the dial's reference frame.
 * @param view  the dial's view.
 */
@Override
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    g2.setStroke(new BasicStroke(1.0f));
    Rectangle2D lengthRect = DialPlot.rectangleByRadius(frame, this.getRadius(), this.getRadius());
    Rectangle2D widthRect = DialPlot.rectangleByRadius(frame, this.getWidthRadius(), this.getWidthRadius());
    double value = ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale);
    DialScale scale = plot.getScaleForDataset(this.getDatasetIndex());
    double angle = scale.valueToAngle(value);

    Arc2D arc1 = new Arc2D.Double(lengthRect, angle, 0, Arc2D.OPEN);
    Point2D pt1 = arc1.getEndPoint();
    Arc2D arc2 = new Arc2D.Double(widthRect, angle - 90.0, 180.0, Arc2D.OPEN);
    Point2D pt2 = arc2.getStartPoint();
    Point2D pt3 = arc2.getEndPoint();
    Arc2D arc3 = new Arc2D.Double(widthRect, angle - 180.0, 0.0, Arc2D.OPEN);
    Point2D pt4 = arc3.getStartPoint();

    GeneralPath gp = new GeneralPath();
    gp.moveTo((float) pt1.getX(), (float) pt1.getY());
    gp.lineTo((float) pt2.getX(), (float) pt2.getY());
    gp.lineTo((float) pt4.getX(), (float) pt4.getY());
    gp.lineTo((float) pt3.getX(), (float) pt3.getY());
    gp.closePath();
    g2.setPaint(this.fillPaint);
    g2.fill(gp);

    g2.setPaint(this.getOutlinePaint());
    Line2D line = new Line2D.Double(frame.getCenterX(), frame.getCenterY(), pt1.getX(), pt1.getY());
    //      g2.draw(line);

    line.setLine(pt2, pt3);
    g2.draw(line);

    line.setLine(pt3, pt1);
    g2.draw(line);

    line.setLine(pt2, pt1);
    g2.draw(line);

    line.setLine(pt2, pt4);
    g2.draw(line);

    line.setLine(pt3, pt4);
    g2.draw(line);
}

---

From source file:diet.gridr.g5k.util.ExtendedStackedBarRenderer.java

/**
 * Draws a stacked bar for a specific item.
 *
 * @param g2  the graphics device./* ww w  .ja v a2s. c  om*/
 * @param state  the renderer state.
 * @param dataArea  the plot area.
 * @param plot  the plot.
 * @param domainAxis  the domain (category) axis.
 * @param rangeAxis  the range (value) axis.
 * @param dataset  the data.
 * @param row  the row index (zero-based).
 * @param column  the column index (zero-based).
 * @param pass  the pass index.
 */
public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot,
        CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) {

    // nothing is drawn for null values...
    Number dataValue = dataset.getValue(row, column);
    if (dataValue == null) {
        return;
    }

    double value = dataValue.doubleValue();

    PlotOrientation orientation = plot.getOrientation();
    double barW0 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea, plot.getDomainAxisEdge())
            - state.getBarWidth() / 2.0;

    double positiveBase = 0.0;
    double negativeBase = 0.0;

    for (int i = 0; i < row; i++) {
        Number v = dataset.getValue(i, column);
        if (v != null) {
            double d = v.doubleValue();
            if (d > 0) {
                positiveBase = positiveBase + d;
            } else {
                negativeBase = negativeBase + d;
            }
        }
    }

    double translatedBase;
    double translatedValue;
    RectangleEdge location = plot.getRangeAxisEdge();
    if (value > 0.0) {
        translatedBase = rangeAxis.valueToJava2D(positiveBase, dataArea, location);
        translatedValue = rangeAxis.valueToJava2D(positiveBase + value, dataArea, location);
    } else {
        translatedBase = rangeAxis.valueToJava2D(negativeBase, dataArea, location);
        translatedValue = rangeAxis.valueToJava2D(negativeBase + value, dataArea, location);
    }
    double barL0 = Math.min(translatedBase, translatedValue);
    double barLength = Math.max(Math.abs(translatedValue - translatedBase), getMinimumBarLength());

    Rectangle2D bar = null;
    if (orientation == PlotOrientation.HORIZONTAL) {
        bar = new Rectangle2D.Double(barL0, barW0, barLength, state.getBarWidth());
    } else {
        bar = new Rectangle2D.Double(barW0, barL0, state.getBarWidth(), barLength);
    }
    Paint seriesPaint = getItemPaint(row, column);
    g2.setPaint(seriesPaint);
    g2.fill(bar);
    if (isDrawBarOutline() && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
        g2.setStroke(getItemStroke(row, column));
        g2.setPaint(getItemOutlinePaint(row, column));
        g2.draw(bar);
    }

    CategoryItemLabelGenerator generator = getItemLabelGenerator(row, column);
    if (generator != null && isItemLabelVisible(row, column)) {
        drawItemLabel(g2, dataset, row, column, plot, generator, bar, (value < 0.0));
    }

    if (value > 0.0) {
        if (this.showPositiveTotal) {
            if (isLastPositiveItem(dataset, row, column)) {
                g2.setPaint(Color.black);
                g2.setFont(this.totalLabelFont);
                double total = calculateSumOfPositiveValuesForCategory(dataset, column);
                TextUtilities.drawRotatedString(this.totalFormatter.format(total), g2, (float) bar.getCenterX(),
                        (float) (bar.getMinY() - 4.0), TextAnchor.BOTTOM_CENTER, 0.0, TextAnchor.BOTTOM_CENTER);
            }
        }
    } else {
        if (this.showNegativeTotal) {
            if (isLastNegativeItem(dataset, row, column)) {
                g2.setPaint(Color.black);
                g2.setFont(this.totalLabelFont);
                double total = calculateSumOfNegativeValuesForCategory(dataset, column);
                TextUtilities.drawRotatedString(String.valueOf(total), g2, (float) bar.getCenterX(),
                        (float) (bar.getMaxY() + 4.0), TextAnchor.TOP_CENTER, 0.0, TextAnchor.TOP_CENTER);
            }
        }
    }

    // collect entity and tool tip information...
    if (state.getInfo() != null) {
        EntityCollection entities = state.getEntityCollection();
        if (entities != null) {
            String tip = null;
            CategoryToolTipGenerator tipster = getToolTipGenerator(row, column);
            if (tipster != null) {
                tip = tipster.generateToolTip(dataset, row, column);
            }
            String url = null;
            if (getItemURLGenerator(row, column) != null) {
                url = getItemURLGenerator(row, column).generateURL(dataset, row, column);
            }
            CategoryItemEntity entity = new CategoryItemEntity(bar, tip, url, dataset, row,
                    dataset.getColumnKey(column), column);
            entities.add(entity);
        }
    }

}

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From source file:org.gvsig.remotesensing.scatterplot.chart.ScatterPlotDiagram.java

/**
 * @param selection .//w  w w .j a  v  a  2s.  c  om
 * @return range[] rangos del rectangulo
 */
public Range[] getRange(Rectangle2D selection) {

    Range[] rangos = new Range[2];

    // get the origin of the zoom selection in the Java2D space used for
    // drawing the chart (that is, before any scaling to fit the panel)
    Point2D selectOrigin = translateScreenToJava2D(
            new Point((int) Math.ceil(selection.getX()), (int) Math.ceil(selection.getY())));
    PlotRenderingInfo plotInfo = this.info.getPlotInfo();
    Rectangle2D scaledDataArea = getScreenDataArea((int) selection.getCenterX(), (int) selection.getCenterY());
    if ((selection.getHeight() > 0) && (selection.getWidth() > 0)) {

        double hLower = (selection.getMinX() - scaledDataArea.getMinX()) / scaledDataArea.getWidth();
        double hUpper = (selection.getMaxX() - scaledDataArea.getMinX()) / scaledDataArea.getWidth();
        double vLower = (scaledDataArea.getMaxY() - selection.getMaxY()) / scaledDataArea.getHeight();
        double vUpper = (scaledDataArea.getMaxY() - selection.getMinY()) / scaledDataArea.getHeight();

        Plot p = this.chart.getPlot();
        if (p instanceof ScatterPlotChart) {
            ScatterPlotChart z = (ScatterPlotChart) p;
            if (z.getOrientation() == PlotOrientation.HORIZONTAL) {
                rangos[0] = z.getRangeX(vLower, vUpper, plotInfo, selectOrigin);
                rangos[1] = z.getRangeY(hLower, hUpper, plotInfo, selectOrigin);
            } else {
                // devolver las coordenadas del rectangulo.
                rangos[0] = z.getRangeX(hLower, hUpper, plotInfo, selectOrigin);
                rangos[1] = z.getRangeY(vLower, vUpper, plotInfo, selectOrigin);
            }
        }

    }

    return rangos;
}

---

From source file:genlab.gui.jfreechart.EnhancedSpiderWebPlot.java

/**
 * Returns the location for a label/*from  www  .java  2 s .c  o m*/
 *
 * @param labelBounds the label bounds.
 * @param ascent the ascent (height of font).
 * @param plotArea the plot area
 * @param startAngle the start angle for the pie series.
 *
 * @return The location for a label.
 */
protected Point2D calculateLabelLocation(Rectangle2D labelBounds, double ascent, Rectangle2D plotArea,
        double startAngle) {
    Arc2D arc1 = new Arc2D.Double(plotArea, startAngle, 0, Arc2D.OPEN);
    Point2D point1 = arc1.getEndPoint();

    double deltaX = -(point1.getX() - plotArea.getCenterX()) * this.axisLabelGap;
    double deltaY = -(point1.getY() - plotArea.getCenterY()) * this.axisLabelGap;

    double labelX = point1.getX() - deltaX;
    double labelY = point1.getY() - deltaY;

    if (labelX < plotArea.getCenterX()) {
        labelX -= labelBounds.getWidth();
    }

    if (labelX == plotArea.getCenterX()) {
        labelX -= labelBounds.getWidth() / 2;
    }

    if (labelY > plotArea.getCenterY()) {
        labelY += ascent;
    }

    return new Point2D.Double(labelX, labelY);
}

---

From source file:edu.ucla.stat.SOCR.chart.gui.ExtendedStackedBarRenderer.java

/**
 * Draws a stacked bar for a specific item.
 *
 * @param g2  the graphics device.//from   w  w w .j  a  v  a  2s  .com
 * @param state  the renderer state.
 * @param dataArea  the plot area.
 * @param plot  the plot.
 * @param domainAxis  the domain (category) axis.
 * @param rangeAxis  the range (value) axis.
 * @param dataset  the data.
 * @param row  the row index (zero-based).
 * @param column  the column index (zero-based).
 * @param pass  the pass index.
 */
public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot,
        CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) {

    // nothing is drawn for null values...
    Number dataValue = dataset.getValue(row, column);
    if (dataValue == null) {
        return;
    }

    double value = dataValue.doubleValue();

    PlotOrientation orientation = plot.getOrientation();
    double barW0 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea, plot.getDomainAxisEdge())
            - state.getBarWidth() / 2.0;

    double positiveBase = 0.0;
    double negativeBase = 0.0;

    for (int i = 0; i < row; i++) {
        Number v = dataset.getValue(i, column);
        if (v != null) {
            double d = v.doubleValue();
            if (d > 0) {
                positiveBase = positiveBase + d;
            } else {
                negativeBase = negativeBase + d;
            }
        }
    }

    double translatedBase;
    double translatedValue;
    RectangleEdge location = plot.getRangeAxisEdge();
    if (value > 0.0) {
        translatedBase = rangeAxis.valueToJava2D(positiveBase, dataArea, location);
        translatedValue = rangeAxis.valueToJava2D(positiveBase + value, dataArea, location);
    } else {
        translatedBase = rangeAxis.valueToJava2D(negativeBase, dataArea, location);
        translatedValue = rangeAxis.valueToJava2D(negativeBase + value, dataArea, location);
    }
    double barL0 = Math.min(translatedBase, translatedValue);
    double barLength = Math.max(Math.abs(translatedValue - translatedBase), getMinimumBarLength());

    Rectangle2D bar = null;
    if (orientation == PlotOrientation.HORIZONTAL) {
        bar = new Rectangle2D.Double(barL0, barW0, barLength, state.getBarWidth());
    } else {
        bar = new Rectangle2D.Double(barW0, barL0, state.getBarWidth(), barLength);
    }
    Paint seriesPaint = getItemPaint(row, column);
    g2.setPaint(seriesPaint);
    g2.fill(bar);
    if (isDrawBarOutline() && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
        g2.setStroke(getItemStroke(row, column));
        g2.setPaint(getItemOutlinePaint(row, column));
        g2.draw(bar);
    }

    CategoryItemLabelGenerator generator = getItemLabelGenerator(row, column);
    if (generator != null && isItemLabelVisible(row, column)) {
        drawItemLabel(g2, dataset, row, column, plot, generator, bar, (value < 0.0));
    }

    if (value > 0.0) {
        if (this.showPositiveTotal) {
            if (isLastPositiveItem(dataset, row, column)) {
                g2.setPaint(Color.black);
                g2.setFont(this.totalLabelFont);
                double total = calculateSumOfPositiveValuesForCategory(dataset, column);
                if (orientation == PlotOrientation.HORIZONTAL)
                    TextUtilities.drawRotatedString(this.totalFormatter.format(total), g2,
                            (float) (bar.getMaxX() + 5.0), (float) bar.getCenterY(), TextAnchor.CENTER_LEFT,
                            0.0, TextAnchor.CENTER_LEFT);

                else
                    TextUtilities.drawRotatedString(this.totalFormatter.format(total), g2,
                            (float) bar.getCenterX(), (float) (bar.getMinY() - 4.0), TextAnchor.BOTTOM_CENTER,
                            0.0, TextAnchor.BOTTOM_CENTER);
            }
        }
    } else {
        if (this.showNegativeTotal) {
            if (isLastNegativeItem(dataset, row, column)) {
                g2.setPaint(Color.black);
                g2.setFont(this.totalLabelFont);
                double total = calculateSumOfNegativeValuesForCategory(dataset, column);
                if (orientation == PlotOrientation.HORIZONTAL)
                    TextUtilities.drawRotatedString(String.valueOf(total), g2, (float) (bar.getMinX() - 5.0),
                            (float) bar.getCenterY(), TextAnchor.CENTER_RIGHT, 0.0, TextAnchor.CENTER_RIGHT);
                else
                    TextUtilities.drawRotatedString(String.valueOf(total), g2, (float) bar.getCenterX(),
                            (float) (bar.getMaxY() + 4.0), TextAnchor.TOP_CENTER, 0.0, TextAnchor.TOP_CENTER);
            }
        }
    }

    // collect entity and tool tip information...
    if (state.getInfo() != null) {
        EntityCollection entities = state.getEntityCollection();
        if (entities != null) {
            String tip = null;
            CategoryToolTipGenerator tipster = getToolTipGenerator(row, column);
            if (tipster != null) {
                tip = tipster.generateToolTip(dataset, row, column);
            }
            String url = null;
            if (getItemURLGenerator(row, column) != null) {
                url = getItemURLGenerator(row, column).generateURL(dataset, row, column);
            }
            CategoryItemEntity entity = new CategoryItemEntity(bar, tip, url, dataset, dataset.getRowKey(row),
                    dataset.getColumnKey(column));
            entities.add(entity);
        }
    }

}

---

From source file:com.igormaznitsa.mindmap.swing.panel.MindMapPanel.java

private int calcDropPosition(final AbstractElement destination, final Point dropPoint) {
    int result = DRAG_POSITION_UNKNOWN;
    if (destination.getClass() == ElementRoot.class) {
        result = dropPoint.getX() < destination.getBounds().getCenterX() ? DRAG_POSITION_LEFT
                : DRAG_POSITION_RIGHT;/*from   www  . j  a v a 2  s . c  o  m*/
    } else {
        final boolean destinationIsLeft = destination.isLeftDirection();
        final Rectangle2D bounds = destination.getBounds();

        if (bounds != null && dropPoint != null) {
            final double edgeOffset = bounds.getWidth() * 0.2d;
            if (dropPoint.getX() >= (bounds.getX() + edgeOffset)
                    && dropPoint.getX() <= (bounds.getMaxX() - edgeOffset)) {
                result = dropPoint.getY() < bounds.getCenterY() ? DRAG_POSITION_TOP : DRAG_POSITION_BOTTOM;
            } else if (destinationIsLeft) {
                result = dropPoint.getX() < bounds.getCenterX() ? DRAG_POSITION_LEFT : DRAG_POSITION_UNKNOWN;
            } else {
                result = dropPoint.getX() > bounds.getCenterX() ? DRAG_POSITION_RIGHT : DRAG_POSITION_UNKNOWN;
            }
        }
    }
    return result;
}

---

From source file:spinworld.gui.RadarPlot.java

private void drawTickLabel(Graphics2D g2, Rectangle2D radarArea, Point2D middlePoint, double _axisAngle,
        int cat, double tick) {
    double axisAngle = normalize(_axisAngle);
    double _origin = getOrigin(cat).doubleValue();
    double max = getMaxValue(cat).doubleValue();
    double tickValue = ((max - _origin) * tick) + _origin;
    String label = "" + Math.round(tickValue * 1000) / 1000d;
    FontRenderContext frc = g2.getFontRenderContext();
    Rectangle2D labelBounds = getLabelFont().getStringBounds(label, frc);
    int labelW = (int) labelBounds.getWidth();
    int labelH = (int) labelBounds.getHeight();

    double centerX = radarArea.getCenterX();
    double centerY = radarArea.getCenterY();

    double adj = middlePoint.distance(centerX, centerY);
    double opp = TICK_MARK_LENGTH / 2 + 4;
    double hyp = Math.sqrt(Math.pow(opp, 2) + Math.pow(adj, 2));
    double angle = Math.toDegrees(Math.atan(opp / adj));
    int charHeight = g2.getFontMetrics().getHeight();
    int charWidth = g2.getFontMetrics().charWidth('M');

    double alphaRad = Math.toRadians(axisAngle - angle);
    double labelX = centerX + (hyp * Math.cos(alphaRad));
    double labelY = centerY - (hyp * Math.sin(alphaRad)) + labelH;

    //        g2.draw(new Line2D.Double(centerX, centerY, labelX, labelY - labelH)); // test line

    double sinGap = Math.pow(Math.sin(Math.toRadians(axisAngle)), 2);
    if (axisAngle > 90 && axisAngle < 270) {
        labelY -= labelH;/*from w  ww  .  jav a2  s.  c  o m*/
        labelY += (charHeight * sinGap / 2);
    } else {
        labelY -= (charHeight * sinGap / 2);
    }
    double cosGap = Math.pow(Math.cos(Math.toRadians(axisAngle)), 2);
    if (axisAngle > 180) {
        labelX -= labelW;
        labelX += (charWidth * cosGap / 2);
    } else {
        labelX -= (charWidth * cosGap / 2);
    }
    //        g2.drawRect((int) labelX, (int) labelY - labelH, labelW, labelH); // test rectangle
    g2.setPaint(getLabelPaint());
    g2.setFont(getLabelFont());
    g2.drawString(label, (float) labelX, (float) labelY);
}

---

From source file:com.isti.traceview.common.TraceViewChartPanel.java

/**
 * Zooms in on a selected region./*from   w ww .j ava  2  s  . c o  m*/
 * 
 * @param selection
 *            the selected region.
 */
public void zoom(Rectangle2D selection) {

    // get the origin of the zoom selection in the Java2D space used for
    // drawing the chart (that is, before any scaling to fit the panel)
    Point2D selectOrigin = translateScreenToJava2D(
            new Point((int) Math.ceil(selection.getX()), (int) Math.ceil(selection.getY())));
    PlotRenderingInfo plotInfo = this.info.getPlotInfo();
    Rectangle2D scaledDataArea = getScreenDataArea((int) selection.getCenterX(), (int) selection.getCenterY());
    if ((selection.getHeight() > 0) && (selection.getWidth() > 0)) {

        double hLower = (selection.getMinX() - scaledDataArea.getMinX()) / scaledDataArea.getWidth();
        double hUpper = (selection.getMaxX() - scaledDataArea.getMinX()) / scaledDataArea.getWidth();
        double vLower = (scaledDataArea.getMaxY() - selection.getMaxY()) / scaledDataArea.getHeight();
        double vUpper = (scaledDataArea.getMaxY() - selection.getMinY()) / scaledDataArea.getHeight();

        Plot p = this.chart.getPlot();
        if (p instanceof Zoomable) {
            Zoomable z = (Zoomable) p;
            if (z.getOrientation() == PlotOrientation.HORIZONTAL) {
                z.zoomDomainAxes(vLower, vUpper, plotInfo, selectOrigin);
                z.zoomRangeAxes(hLower, hUpper, plotInfo, selectOrigin);
            } else {
                z.zoomDomainAxes(hLower, hUpper, plotInfo, selectOrigin);
                z.zoomRangeAxes(vLower, vUpper, plotInfo, selectOrigin);
            }
        }
    }
}

---

From source file:org.rdv.viz.chart.ChartPanel.java

/**
 * Zooms in on a selected region.//from  w  w  w.j a v  a  2s  .com
 *
 * @param selection  the selected region.
 */
public void zoom(Rectangle2D selection) {

    // get the origin of the zoom selection in the Java2D space used for
    // drawing the chart (that is, before any scaling to fit the panel)
    Point2D selectOrigin = translateScreenToJava2D(
            new Point((int) Math.ceil(selection.getX()), (int) Math.ceil(selection.getY())));
    PlotRenderingInfo plotInfo = this.info.getPlotInfo();
    Rectangle2D scaledDataArea = getScreenDataArea((int) selection.getCenterX(), (int) selection.getCenterY());
    if ((selection.getHeight() > 0) && (selection.getWidth() > 0)) {

        double hLower = (selection.getMinX() - scaledDataArea.getMinX()) / scaledDataArea.getWidth();
        double hUpper = (selection.getMaxX() - scaledDataArea.getMinX()) / scaledDataArea.getWidth();
        double vLower = (scaledDataArea.getMaxY() - selection.getMaxY()) / scaledDataArea.getHeight();
        double vUpper = (scaledDataArea.getMaxY() - selection.getMinY()) / scaledDataArea.getHeight();

        Plot p = this.chart.getPlot();
        if (p instanceof Zoomable) {
            // save previous ranges for use later when zooming out
            if (p instanceof XYPlot && rangeHistory.empty()) {
                XYPlot xyPlot = (XYPlot) p;
                rangeHistory.push(xyPlot.getDomainAxis().getRange());
                rangeHistory.push(xyPlot.getRangeAxis().getRange());
            }

            Zoomable z = (Zoomable) p;
            if (z.getOrientation() == PlotOrientation.HORIZONTAL) {
                z.zoomDomainAxes(vLower, vUpper, plotInfo, selectOrigin);
                z.zoomRangeAxes(hLower, hUpper, plotInfo, selectOrigin);
            } else {
                z.zoomDomainAxes(hLower, hUpper, plotInfo, selectOrigin);
                z.zoomRangeAxes(vLower, vUpper, plotInfo, selectOrigin);
            }

            // save current ranges for use later when zooming out
            if (p instanceof XYPlot) {
                XYPlot xyPlot = (XYPlot) p;
                rangeHistory.push(xyPlot.getDomainAxis().getRange());
                rangeHistory.push(xyPlot.getRangeAxis().getRange());
            }
        }

    }

}

---

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