X-Git-Url: https://git.gag.com/?a=blobdiff_plain;ds=sidebyside;f=android-libraries%2Fachartengine%2Fsrc%2Forg%2Fachartengine%2Fchart%2FDialChart.java;fp=android-libraries%2Fachartengine%2Fsrc%2Forg%2Fachartengine%2Fchart%2FDialChart.java;h=ebfcbbb1fbe24e1f84af886e8c0ad9c00ed7ee57;hb=9349577cdfdff682b2aabd6daa24fdc3a7449b58;hp=0000000000000000000000000000000000000000;hpb=30ba0a882f0c061176ba14dbf86d3d6fad096c02;p=debian%2Fopenrocket

diff --git a/android-libraries/achartengine/src/org/achartengine/chart/DialChart.java b/android-libraries/achartengine/src/org/achartengine/chart/DialChart.java
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+/**
+ * Copyright (C) 2009 - 2012 SC 4ViewSoft SRL
+ *  
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *  
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *  
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.achartengine.chart;
+
+import org.achartengine.model.CategorySeries;
+import org.achartengine.renderer.DefaultRenderer;
+import org.achartengine.renderer.DialRenderer;
+import org.achartengine.renderer.DialRenderer.Type;
+import org.achartengine.util.MathHelper;
+
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Paint.Align;
+import android.graphics.Paint.Style;
+
+/**
+ * The dial chart rendering class.
+ */
+public class DialChart extends RoundChart {
+  /** The radius of the needle. */
+  private static final int NEEDLE_RADIUS = 10;
+  /** The series renderer. */
+  private DialRenderer mRenderer;
+
+  /**
+   * Builds a new dial chart instance.
+   * 
+   * @param dataset the series dataset
+   * @param renderer the dial renderer
+   */
+  public DialChart(CategorySeries dataset, DialRenderer renderer) {
+    super(dataset, renderer);
+    mRenderer = renderer;
+  }
+
+  /**
+   * The graphical representation of the dial chart.
+   * 
+   * @param canvas the canvas to paint to
+   * @param x the top left x value of the view to draw to
+   * @param y the top left y value of the view to draw to
+   * @param width the width of the view to draw to
+   * @param height the height of the view to draw to
+   * @param paint the paint
+   */
+  @Override
+  public void draw(Canvas canvas, int x, int y, int width, int height, Paint paint) {
+    paint.setAntiAlias(mRenderer.isAntialiasing());
+    paint.setStyle(Style.FILL);
+    paint.setTextSize(mRenderer.getLabelsTextSize());
+    int legendSize = getLegendSize(mRenderer, height / 5, 0);
+    int left = x;
+    int top = y;
+    int right = x + width;
+
+    int sLength = mDataset.getItemCount();
+    String[] titles = new String[sLength];
+    for (int i = 0; i < sLength; i++) {
+      titles[i] = mDataset.getCategory(i);
+    }
+
+    if (mRenderer.isFitLegend()) {
+      legendSize = drawLegend(canvas, mRenderer, titles, left, right, y, width, height, legendSize,
+          paint, true);
+    }
+    int bottom = y + height - legendSize;
+    drawBackground(mRenderer, canvas, x, y, width, height, paint, false, DefaultRenderer.NO_COLOR);
+
+    int mRadius = Math.min(Math.abs(right - left), Math.abs(bottom - top));
+    int radius = (int) (mRadius * 0.35 * mRenderer.getScale());
+    if (mCenterX == NO_VALUE) {
+      mCenterX = (left + right) / 2;
+    }
+    if (mCenterY == NO_VALUE) {
+      mCenterY = (bottom + top) / 2;
+    }
+    float shortRadius = radius * 0.9f;
+    float longRadius = radius * 1.1f;
+    double min = mRenderer.getMinValue();
+    double max = mRenderer.getMaxValue();
+    double angleMin = mRenderer.getAngleMin();
+    double angleMax = mRenderer.getAngleMax();
+    if (!mRenderer.isMinValueSet() || !mRenderer.isMaxValueSet()) {
+      int count = mRenderer.getSeriesRendererCount();
+      for (int i = 0; i < count; i++) {
+        double value = mDataset.getValue(i);
+        if (!mRenderer.isMinValueSet()) {
+          min = Math.min(min, value);
+        }
+        if (!mRenderer.isMaxValueSet()) {
+          max = Math.max(max, value);
+        }
+      }
+    }
+    if (min == max) {
+      min = min * 0.5;
+      max = max * 1.5;
+    }
+
+    paint.setColor(mRenderer.getLabelsColor());
+    double minorTicks = mRenderer.getMinorTicksSpacing();
+    double majorTicks = mRenderer.getMajorTicksSpacing();
+    if (minorTicks == MathHelper.NULL_VALUE) {
+      minorTicks = (max - min) / 30;
+    }
+    if (majorTicks == MathHelper.NULL_VALUE) {
+      majorTicks = (max - min) / 10;
+    }
+    drawTicks(canvas, min, max, angleMin, angleMax, mCenterX, mCenterY, longRadius, radius,
+        minorTicks, paint, false);
+    drawTicks(canvas, min, max, angleMin, angleMax, mCenterX, mCenterY, longRadius, shortRadius,
+        majorTicks, paint, true);
+
+    int count = mRenderer.getSeriesRendererCount();
+    for (int i = 0; i < count; i++) {
+      double angle = getAngleForValue(mDataset.getValue(i), angleMin, angleMax, min, max);
+      paint.setColor(mRenderer.getSeriesRendererAt(i).getColor());
+      boolean type = mRenderer.getVisualTypeForIndex(i) == Type.ARROW;
+      drawNeedle(canvas, angle, mCenterX, mCenterY, shortRadius, type, paint);
+    }
+    drawLegend(canvas, mRenderer, titles, left, right, y, width, height, legendSize, paint, false);
+    drawTitle(canvas, x, y, width, paint);
+  }
+
+  /**
+   * Returns the angle for a specific chart value.
+   * 
+   * @param value the chart value
+   * @param minAngle the minimum chart angle value
+   * @param maxAngle the maximum chart angle value
+   * @param min the minimum chart value
+   * @param max the maximum chart value
+   * @return the angle
+   */
+  private double getAngleForValue(double value, double minAngle, double maxAngle, double min,
+      double max) {
+    double angleDiff = maxAngle - minAngle;
+    double diff = max - min;
+    return Math.toRadians(minAngle + (value - min) * angleDiff / diff);
+  }
+
+  /**
+   * Draws the chart tick lines.
+   * 
+   * @param canvas the canvas
+   * @param min the minimum chart value
+   * @param max the maximum chart value
+   * @param minAngle the minimum chart angle value
+   * @param maxAngle the maximum chart angle value
+   * @param centerX the center x value
+   * @param centerY the center y value
+   * @param longRadius the long radius
+   * @param shortRadius the short radius
+   * @param ticks the tick spacing
+   * @param paint the paint settings
+   * @param labels paint the labels
+   * @return the angle
+   */
+  private void drawTicks(Canvas canvas, double min, double max, double minAngle, double maxAngle,
+      int centerX, int centerY, double longRadius, double shortRadius, double ticks, Paint paint,
+      boolean labels) {
+    for (double i = min; i <= max; i += ticks) {
+      double angle = getAngleForValue(i, minAngle, maxAngle, min, max);
+      double sinValue = Math.sin(angle);
+      double cosValue = Math.cos(angle);
+      int x1 = Math.round(centerX + (float) (shortRadius * sinValue));
+      int y1 = Math.round(centerY + (float) (shortRadius * cosValue));
+      int x2 = Math.round(centerX + (float) (longRadius * sinValue));
+      int y2 = Math.round(centerY + (float) (longRadius * cosValue));
+      canvas.drawLine(x1, y1, x2, y2, paint);
+      if (labels) {
+        paint.setTextAlign(Align.LEFT);
+        if (x1 <= x2) {
+          paint.setTextAlign(Align.RIGHT);
+        }
+        String text = i + "";
+        if (Math.round(i) == (long) i) {
+          text = (long) i + "";
+        }
+        canvas.drawText(text, x1, y1, paint);
+      }
+    }
+  }
+
+  /**
+   * Returns the angle for a specific chart value.
+   * 
+   * @param canvas the canvas
+   * @param angle the needle angle value
+   * @param centerX the center x value
+   * @param centerY the center y value
+   * @param radius the radius
+   * @param arrow if a needle or an arrow to be painted
+   * @param paint the paint settings
+   * @return the angle
+   */
+  private void drawNeedle(Canvas canvas, double angle, int centerX, int centerY, double radius,
+      boolean arrow, Paint paint) {
+    double diff = Math.toRadians(90);
+    int needleSinValue = (int) (NEEDLE_RADIUS * Math.sin(angle - diff));
+    int needleCosValue = (int) (NEEDLE_RADIUS * Math.cos(angle - diff));
+    int needleX = (int) (radius * Math.sin(angle));
+    int needleY = (int) (radius * Math.cos(angle));
+    int needleCenterX = centerX + needleX;
+    int needleCenterY = centerY + needleY;
+    float[] points;
+    if (arrow) {
+      int arrowBaseX = centerX + (int) (radius * 0.85 * Math.sin(angle));
+      int arrowBaseY = centerY + (int) (radius * 0.85 * Math.cos(angle));
+      points = new float[] { arrowBaseX - needleSinValue, arrowBaseY - needleCosValue,
+          needleCenterX, needleCenterY, arrowBaseX + needleSinValue, arrowBaseY + needleCosValue };
+      float width = paint.getStrokeWidth();
+      paint.setStrokeWidth(5);
+      canvas.drawLine(centerX, centerY, needleCenterX, needleCenterY, paint);
+      paint.setStrokeWidth(width);
+    } else {
+      points = new float[] { centerX - needleSinValue, centerY - needleCosValue, needleCenterX,
+          needleCenterY, centerX + needleSinValue, centerY + needleCosValue };
+    }
+    drawPath(canvas, points, paint, true);
+  }
+
+}