Revision 19516 trunk/extensions/extRasterTools-SE/src/org/gvsig/raster/beans/canvas/layers/GraphicHistogram.java
| GraphicHistogram.java | ||
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* @author Nacho Brodin (nachobrodin@gmail.com) |
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*/ |
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public class GraphicHistogram extends DrawableElement {
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public static final int TYPE_LINE = 1; |
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public static final int TYPE_FILL = 2; |
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public static final int TYPE_LINE = 1; |
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public static final int TYPE_FILL = 2; |
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private int border = 2; |
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public static final int VIEW_LINEAL = 0; |
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public static final int VIEW_ACUMMULATED = 1; |
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public static final int VIEW_LOGARITHMIC = 2; |
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public static final int VIEW_ACUMMULATEDLOG = 3; |
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private int border = 2; |
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// Valores de la funci?n original |
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private double[] histogramValues = null; |
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// Valores que se pintan en la gr?fica |
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private double[] valuesLineal = null; |
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private double[] valuesAcummulated = null; |
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private double[] valuesLogarithmic = null; |
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private double[] valuesAcummulatedLog = null; |
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private int typeViewed = 0; |
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private int type = TYPE_LINE; |
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//Valores de la funci?n original |
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private double[] hValues = null; |
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//Valores que se pintan en la gr?fica |
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private double[] valuesY = null; |
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private int type = TYPE_LINE; |
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private double min, max; |
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/** |
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* Constructor. Asigna el color |
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* @param c |
| ... | ... | |
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* Dibujado de la l?nea de incremento exponencial sobre el canvas. |
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*/ |
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protected void paint(Graphics g) {
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if (valuesY == null) |
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double[] valuesToDraw = recalcHistogram(typeViewed); |
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if (valuesToDraw == null) |
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return; |
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g.setColor(color); |
| ... | ... | |
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switch (type) {
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case TYPE_FILL: |
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width = canvas.getCanvasMaxX() - canvas.getCanvasMinX(); |
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for (int i = 0; i < valuesY.length; i++) {
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int x1 = (int) Math.round(((double) i - 0.5D) * (width / (valuesY.length - 1.0D)));
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int x2 = (int) Math.round(((double) i + 0.5D) * (width / (valuesY.length - 1.0D)));
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for (int i = 0; i < valuesToDraw.length; i++) {
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int x1 = (int) Math.round(((double) i - 0.5D) * (width / (valuesToDraw.length - 1.0D)));
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int x2 = (int) Math.round(((double) i + 0.5D) * (width / (valuesToDraw.length - 1.0D)));
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x1 += canvas.getCanvasMinX(); |
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x2 += canvas.getCanvasMinX(); |
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int y1 = valueToPixelY(valuesY[i]);
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int y1 = valueToPixelY(valuesToDraw[i]);
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if (x1 < (canvas.getCanvasMinX() + border)) |
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x1 = canvas.getCanvasMinX() + border; |
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if (x2 > (canvas.getCanvasMaxX() - border)) |
| ... | ... | |
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break; |
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default: |
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width = canvas.getCanvasMaxX() - canvas.getCanvasMinX(); |
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for (int i = 1; i < valuesY.length; i++) {
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int x1 = (int) Math.round(canvas.getCanvasMinX() + ((i - 1.0D) * (width / (valuesY.length - 1.0D))));
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int x2 = (int) Math.round(canvas.getCanvasMinX() + (i * (width / (valuesY.length - 1.0D))));
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g.drawLine(x1, valueToPixelY(valuesY[i - 1]), x2, valueToPixelY(valuesY[i]));
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for (int i = 1; i < valuesToDraw.length; i++) {
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int x1 = (int) Math.round(canvas.getCanvasMinX() + ((i - 1.0D) * (width / (valuesToDraw.length - 1.0D))));
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int x2 = (int) Math.round(canvas.getCanvasMinX() + (i * (width / (valuesToDraw.length - 1.0D))));
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g.drawLine(x1, valueToPixelY(valuesToDraw[i - 1]), x2, valueToPixelY(valuesToDraw[i]));
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} |
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break; |
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} |
| ... | ... | |
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} |
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/** |
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* Obtiene el m?nimo valor de la gr?fica
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* @return
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* Asigna el tipo de vista para el histograma a mostrar. No hace un repintado
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* @param type
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*/ |
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public double getMin() {
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return min;
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public void setTypeViewed(int type) {
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this.typeViewed = type;
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} |
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/** |
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* Obtiene el m?ximo valor de la gr?fica |
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* @return |
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* Convertimos los valores del histograma a visualizar a una escala de |
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* porcentajes que es lo que representa visualmente el componente |
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* @param values |
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*/ |
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public double getMax() {
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return max; |
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private void convertToPercent(double[] values) {
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double max = Double.NEGATIVE_INFINITY; |
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for (int i = 0; i < values.length; i++) |
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if (values[i] > max) |
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max = values[i]; |
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for (int i = 0; i < values.length; i++) |
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values[i] = values[i] / max; |
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} |
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/** |
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* Asigna el m?nimo valor para el histograma |
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* @param min |
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* Calculamos el histograma a dibujar en cuestion. Los tipos son:<p> |
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* VIEW_LINEAL<br> |
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* VIEW_ACUMMULATED<br> |
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* VIEW_LOGARITHMIC |
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* |
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* @param type |
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* @return |
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*/ |
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public void setMin(double min) {
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this.min = min; |
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private double[] recalcHistogram(int type) {
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double min; |
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switch (type) {
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// Calcular la grafica acumulada |
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case VIEW_ACUMMULATED: |
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// Si ya estan calculados, no los vuelve a calcular |
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if (valuesAcummulated != null) return valuesAcummulated; |
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valuesAcummulated = new double[histogramValues.length]; |
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if (valuesAcummulated.length >= 1) {
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valuesAcummulated[0] = histogramValues[0]; |
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for (int i = 1; i < histogramValues.length; i++) |
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valuesAcummulated[i] = histogramValues[i] + valuesAcummulated[i - 1]; |
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} |
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convertToPercent(valuesAcummulated); |
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return valuesAcummulated; |
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// Calcular la grafica logaritmica |
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case VIEW_LOGARITHMIC: |
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// Si ya estan calculados, no los vuelve a calcular |
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if (valuesLogarithmic != null) return valuesLogarithmic; |
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/** Falta Codigo para la logaritmica **/ |
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min = Double.MAX_VALUE; |
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for (int i = 0; i < histogramValues.length; i++) |
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if (histogramValues[i] < min) |
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min = histogramValues[i]; |
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valuesLogarithmic = new double[histogramValues.length]; |
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for (int i = 0; i < histogramValues.length; i++) |
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valuesLogarithmic[i] = java.lang.Math.log(histogramValues[i] - min + 1.0); |
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convertToPercent(valuesLogarithmic); |
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return valuesLogarithmic; |
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// Calcular la grafica acumulada |
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case VIEW_ACUMMULATEDLOG: |
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// Si ya estan calculados, no los vuelve a calcular |
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if (valuesAcummulatedLog != null) return valuesAcummulatedLog; |
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valuesAcummulatedLog = new double[histogramValues.length]; |
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if (valuesAcummulatedLog.length >= 1) {
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valuesAcummulatedLog[0] = histogramValues[0]; |
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for (int i = 1; i < histogramValues.length; i++) |
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valuesAcummulatedLog[i] = histogramValues[i] + valuesAcummulatedLog[i - 1]; |
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} |
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min = Double.MAX_VALUE; |
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for (int i = 0; i < valuesAcummulatedLog.length; i++) |
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if (valuesAcummulatedLog[i] < min) |
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min = valuesAcummulatedLog[i]; |
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for (int i = 0; i < valuesAcummulatedLog.length; i++) |
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valuesAcummulatedLog[i] = java.lang.Math.log(valuesAcummulatedLog[i] - min + 1.0); |
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convertToPercent(valuesAcummulatedLog); |
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return valuesAcummulatedLog; |
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// Si no es logaritmica ni acumulada, lo tratamos como si fuera lineal |
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default: |
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// Si ya estan calculados, no los vuelve a calcular |
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if (valuesLineal != null) return valuesLineal; |
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valuesLineal = new double[histogramValues.length]; |
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for (int i = 0; i < histogramValues.length; i++) |
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valuesLineal[i] = histogramValues[i]; |
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convertToPercent(valuesLineal); |
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return valuesLineal; |
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} |
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} |
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/** |
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* Asigna el m?ximo valor para el histograma |
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* @param max |
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*/ |
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public void setMax(double max) {
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this.max = max; |
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} |
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/** |
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* Asigna el histograma a visualizar |
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* @param histogramDrawed |
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*/ |
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public void setHistogramDrawed(double[] histogramDrawed) {
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hValues = histogramDrawed; |
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histogramValues = histogramDrawed; |
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valuesLineal = null; |
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valuesAcummulated = null; |
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valuesLogarithmic = null; |
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valuesAcummulatedLog = null; |
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max = Double.NEGATIVE_INFINITY; |
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for (int i = 0; i < histogramDrawed.length; i++) {
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if (histogramDrawed[i] > max) |
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max = histogramDrawed[i]; |
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} |
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valuesY = new double[histogramDrawed.length]; |
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for (int i = 0; i < histogramDrawed.length; i++) |
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valuesY[i] = histogramDrawed[i] / max; |
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if (canvas != null) |
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canvas.repaint(); |
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} |
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