# HG changeset patch # User Felix Wolfsteller # Date 1313586293 0 # Node ID cf39205df113ad09bf28377407dbff20a058b02a # Parent 4dcc635d6ca6f93a2b21abb41154e2774975cb4f Part of refactoring (see next commit). flys-artifacts/trunk@2500 c6561f87-3c4e-4783-a992-168aeb5c3f6f diff -r 4dcc635d6ca6 -r cf39205df113 flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java Wed Aug 17 13:04:53 2011 +0000 @@ -0,0 +1,226 @@ +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); + j2DY2 = j2DY1 - 0.10f * (float) + (rangeAxis.getRange().getUpperBound() + - rangeAxis.getRange().getLowerBound()); + 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()); + } +} + +