Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java @ 1067:f364410c7bc9
Refactored (state access) to ease future development of more trivial artifacts.
flys-artifacts/trunk@2549 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 24 Aug 2011 09:44:31 +0000 |
parents | 8873c43119ca |
children | f16b66839e59 |
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package de.intevation.flys.jfree; import org.apache.log4j.Logger; import java.util.Iterator; import java.awt.Shape; import java.awt.geom.Rectangle2D; import java.awt.geom.Line2D; import org.jfree.chart.annotations.XYTextAnnotation; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.util.LineUtilities; import org.jfree.text.TextUtilities; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.entity.XYAnnotationEntity; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.chart.ChartRenderingInfo; import org.jfree.chart.plot.Plot; import org.jfree.ui.RectangleEdge; /** * Custom Annotations class that is drawn only if no collisions with other * already drawn CustomAnnotations in current plot are found. * Draws a given text and a line to it from either axis. */ public class StickyAxisAnnotation extends XYTextAnnotation { /** Logger for this class. */ private static Logger logger = Logger.getLogger(StickyAxisAnnotation.class); /** Simplified view on axes. */ public static enum SimpleAxis { X_AXIS, /** Usually "horizontal". */ Y_AXIS /** Usually "vertical". */ } /** Which axis to stick to. */ protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS; /** * Trivial constructor. * * @param text Text to display. * @param x X-position in dataspace (typical horizontal, in km). * @param y Y-position in dataspace (typical vertical, in m). */ public StickyAxisAnnotation(String text, float x, float y) { super(text, x, y); } /** * Sets the "sticky axis" (whether to draw annotations at the * X- or the Y-Axis. * * @param stickyAxis axis to stick to. */ public void setStickyAxis(SimpleAxis stickyAxis) { this.stickyAxis = stickyAxis; } /** * Draws a small line at axis where this annotation resides. * * @param g2 the graphics device. * @param dataArea the data area. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param domainEdge the domain edge. * @param rangeEdge the range edge. * @param orientation the plot orientation. */ protected void drawAxisMark( java.awt.Graphics2D g2, java.awt.geom.Rectangle2D dataArea, ValueAxis domainAxis, ValueAxis rangeAxis, RectangleEdge domainEdge, RectangleEdge rangeEdge, PlotOrientation orientation) { float j2DX1 = 0.0f; float j2DX2 = 0.0f; float j2DY1 = 0.0f; float j2DY2 = 0.0f; float x = (float) getX(); float y = (float) getY(); /* When dependent on X/Y-Axis and orientation, following can be used as a base: if (orientation == PlotOrientation.VERTICAL) { j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge); j2DY1 = (float) rangeAxis.valueToJava2D(y, dataArea, rangeEdge); j2DX2 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge); j2DY2 = (float) rangeAxis.valueToJava2D(y, dataArea, rangeEdge); } else if (orientation == PlotOrientation.HORIZONTAL) { j2DY1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge); j2DX1 = (float) rangeAxis.valueToJava2D(y, dataArea, rangeEdge); j2DY2 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge); j2DX2 = (float) rangeAxis.valueToJava2D(y, dataArea, rangeEdge); } g2.setPaint(this.paint); g2.setStroke(this.stroke); */ j2DY1 = (float) RectangleEdge.coordinate(dataArea, domainEdge); double rangeLow = rangeAxis.getRange().getLowerBound(); // Line ends at 1.5% of full distance. j2DY2 = (float) rangeAxis.valueToJava2D( (1f - 0.015f) * rangeLow + 0.015f * rangeAxis.getRange().getUpperBound(), dataArea, rangeEdge); j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge); j2DX2 = j2DX1; Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2); // line is clipped to avoid JRE bug 6574155, for more info // see JFreeChart bug 2221495 boolean visible = LineUtilities.clipLine(line, dataArea); if (visible) { g2.draw(line); } } /** * Draw the Annotiation if it does not collide with other already drawn * Annotations. * * @param g2 the graphics device. * @param plot the plot. * @param dataArea the data area. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param rendererIndex the render index. * @param info state information, escpecially collects info about * already drawn shapes (and thus annotations), used * for collision detection. */ @Override public void draw( java.awt.Graphics2D g2, XYPlot plot, java.awt.geom.Rectangle2D dataArea, ValueAxis domainAxis, ValueAxis rangeAxis, int rendererIndex, PlotRenderingInfo info) { if (info == null) return; // Calculate the bounding box. ChartRenderingInfo chartInfo = info.getOwner(); PlotOrientation orientation = plot.getOrientation(); RectangleEdge domainEdge = Plot.resolveDomainAxisLocation( plot.getDomainAxisLocation(), orientation); RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation( plot.getRangeAxisLocation(), orientation); float anchorX = (float) domainAxis.valueToJava2D( getX(), dataArea, domainEdge); float anchorY = (float) rangeAxis.valueToJava2D( getY(), dataArea, rangeEdge); if (orientation == PlotOrientation.HORIZONTAL) { float tempAnchor = anchorX; anchorX = anchorY; anchorY = tempAnchor; } // Always draw the small line at axis. drawAxisMark(g2, dataArea, domainAxis, rangeAxis, domainEdge, rangeEdge, orientation); g2.setFont(getFont()); Shape hotspot = TextUtilities.calculateRotatedStringBounds( getText(), g2, anchorX, anchorY, getTextAnchor(), getRotationAngle(), getRotationAnchor()); Rectangle2D hotspotBox = hotspot.getBounds2D(); // Check for collisions with other XYAnnotations. for (Iterator i = chartInfo.getEntityCollection().iterator(); i.hasNext(); ) { Object next = i.next(); // Collision with other stuff than XYAnnotations are okay. if (next instanceof XYAnnotationEntity) { XYAnnotationEntity drawnShape = (XYAnnotationEntity) next; if (drawnShape.getArea().intersects(hotspotBox)) { // Found collision, early stop. return; } } } // Actuall drawing. if (getBackgroundPaint() != null) { g2.setPaint(getBackgroundPaint()); g2.fill(hotspot); } g2.setPaint(getPaint()); TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY, getTextAnchor(), getRotationAngle(), getRotationAnchor()); // Draw outline. if (false) { g2.setStroke(getOutlineStroke()); g2.setPaint(getOutlinePaint()); g2.draw(hotspot); } // Add info that we have drawn this Annotation. addEntity(info, hotspot, rendererIndex, getToolTipText(), getURL()); } }