dive4elements/river: flys-artifacts/src/main/java/de/intevation/flys/jfree/StableXYDifferenceRenderer.java comparison

comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/StableXYDifferenceRenderer.java @ 2667:b75681c09ef8

Respect area label bg text style, draw label roughly at centroid of polygons (sofar, better but not yet good). flys-artifacts/trunk@4346 c6561f87-3c4e-4783-a992-168aeb5c3f6f

author	Felix Wolfsteller <felix.wolfsteller@intevation.de>
date	Fri, 04 May 2012 13:47:37 +0000
parents	6da7e064ae90
children	5642a83420f2

comparison

equal deleted inserted replaced

-:6da7e064ae90
+:b75681c09ef8
 import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Graphics2D;
 import java.awt.Font;
 import java.awt.Paint;
+import java.awt.geom.Point2D;
 import java.awt.Shape;
 import java.awt.Stroke;
 import java.awt.geom.GeneralPath;
 import java.awt.geom.Line2D;
 import java.awt.geom.Rectangle2D;
 protected boolean drawOriginalSeries;
 /** The color of the label showing the calculated area. */
 protected Color labelColor;
+/** The background color of the label showing the calculated area. */
+protected Color labelBGColor;
 /** Font to draw label of calculated area with. */
 protected Font labelFont;
 protected int areaCalculationMode;
 protected double positiveArea;
 protected double negativeArea;
 /** Whether or not to draw a label in the area. */
 protected boolean labelArea = true;
+/** Arithmetic centroid of drawn polygons. */
+protected Point2D.Double centroid;
+/** Number of points that contributed to the centroid. */
+protected int centroidNPoints = 0;
 /**
 * This flag controls whether or not the x-coordinates (in Java2D space)
 * are rounded to integers.  When set to true, this can avoid the vertical
 this.drawOutline   = true;
 this.outlineStroke = new BasicStroke(1);
 this.outlinePaint  = Color.black;
 this.drawOriginalSeries = false;
 this.areaCalculationMode = areaCalculationMode;
+this.labelBGColor  = null;
+this.centroid      = new Point2D.Double(0,0);
 }
 public int getAreaCalculationMode() {
 return areaCalculationMode;
 }
 /** Get color with which label is painted. */
 public Color getLabelColor() {
 return this.labelColor;
+}
+/** Set color with which to paint label bg. */
+public void setLabelBGColor(Color color) {
+this.labelBGColor = color;
+}
+/** Get color with which label is painted. */
+public Color getLabelBGColor() {
+return this.labelBGColor;
 }
 public double getCalculatedArea() {
 return positiveArea + negativeArea;
 }
 // Find geometric middle, calculate area and paint a string with it here.
 // TODO also i18n
 if (pass == 1 && this.labelArea) {
-float center_x = 100f;
+double center_x = centroid.getX();
-float center_y = 100f+ pass*50f;
+double center_y = centroid.getY();
+center_x = domainAxis.valueToJava2D(center_x, dataArea,
+plot.getDomainAxisEdge());
+center_y = rangeAxis.valueToJava2D(center_y, dataArea,
+plot.getRangeAxisEdge());
+// Respect text-extend if text should appear really centered.
 float area = 0f;
 if (areaCalculationMode == CALCULATE_POSITIVE_AREA
 || areaCalculationMode == CALCULATE_ALL_AREA) {
 area += Math.abs(positiveArea);
 }
 if (areaCalculationMode == CALCULATE_NEGATIVE_AREA
 || areaCalculationMode == CALCULATE_ALL_AREA) {
 area += Math.abs(negativeArea);
 }
-// TODO respect text bg settings.
 if (area != 0f) {
 Color oldColor = g2.getColor();
 Font oldFont = g2.getFont();
 g2.setFont(labelFont);
+String labelText = "Area= " + area + "m2";
+if (labelBGColor != null) {
+EnhancedLineAndShapeRenderer.drawTextBox(g2, labelText,
+(float)center_x, (float)center_y, labelBGColor);
+}
 g2.setColor(labelColor);
-g2.drawString("Area= "+area+"m2", center_x, center_y);
+g2.drawString(labelText, (float)center_x, (float)center_y);
 g2.setFont(oldFont);
 g2.setColor(oldColor);
 }
 }
 }
 return ((l_minuendLast < l_subtrahendFirst)
 || (l_subtrahendLast < l_minuendFirst));
 }
+public void updateCentroid(Object [] xValues, Object [] yValues) {
+double x = 0d, y = 0d;
+for (int i = 0, N = xValues.length; i < N; ++i) {
+x += ((Double)xValues[i]).doubleValue();
+y += ((Double)yValues[i]).doubleValue();
+}
+x /= xValues.length;
+y /= yValues.length;
+centroidNPoints++;
+double factorNew = 1d / centroidNPoints;
+double factorOld = 1d - factorNew;
+centroid = new Point2D.Double((factorNew * x + factorOld * centroid.x),
+(factorNew * y + factorOld * centroid.y));
+}
 public static double calculateArea(Object [] xValues, Object [] yValues) {
 double area = 0d;
 for (int i = 0, N = xValues.length; i < N; ++i) {
 int j = (i + 1) % N;
 double xj = ((Double)xValues[j]).doubleValue();
 double yj = ((Double)yValues[j]).doubleValue();
 area += xi*yj;
 area -= xj*yi;
+// TODO centroid calculation here?
 }
 return 0.5d*area;
 }
 Object[] l_yValues = x_yValues.toArray();
 double area = calculateArea(l_xValues, l_yValues);
 if (x_positive) positiveArea += area;
 else            negativeArea += area;
+updateCentroid(l_xValues, l_yValues);
 GeneralPath l_path = new GeneralPath();
 if (PlotOrientation.VERTICAL == l_orientation) {
 double l_x = x_domainAxis.valueToJava2D((

Mercurial > dive4elements > river

comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/StableXYDifferenceRenderer.java @ 2667:b75681c09ef8