/**
* 绘制最外围的标签及主轴的刻度线标签
*
* @param canvas 画布
*/
private void renderAxisLabels(Canvas canvas) {
// 标签个数决定角的个数
int labelsCount = getPlotAgentNumber();
// 轴线tick总数
int dataAxisTickCount = getAxisTickCount();
for (int i = 0; i < dataAxisTickCount; i++) {
for (int j = 0; j < labelsCount; j++) {
// 绘制最外围的标签
if (i == dataAxisTickCount - 1) {
// 绘制最外围的标签
String label = CategoryAxis.getDataSet().get(j);
canvas.drawText(label, mArrayLabelX[i][j], mArrayLabelY[i][j], getLabelPaint());
}
// 绘制主轴的刻度线与标签
if (0 == j) { // 显示在第一轴线上(即270度的那根线)
// 绘制主轴(DataAxis)的刻度线
double tick = this.dataAxis.getAxisSteps() * i + dataAxis.getAxisMin();
dataAxis.renderAxisHorizontalTick(
this, canvas, mArrayDotX[i][j], mArrayDotY[i][j], Double.toString(tick));
}
} // end for labels
} // end for data
}
private void initChart() {
dataAxis = new DataAxisRender();
CategoryAxis = new CategoryAxisRender();
dataAxis.setHorizontalTickAlign(Align.LEFT);
dataAxis.getTickLabelPaint().setTextAlign(Align.RIGHT);
dataAxis.setTickMarksVisible(false);
showKeyLabels();
}
/**
* 绘制数据区网络
*
* @param canvas 画布
*/
private void renderDataArea(Canvas canvas) {
float cirX = plotArea.getCenterX();
float cirY = plotArea.getCenterY();
for (RadarData lineData : mDataSet) {
// 画各自的网
List<Double> dataset = lineData.getLinePoint();
int dataSize = dataset.size();
if (dataSize < 3) {
Log.e(TAG, "这几个数据可不够，最少三个起步.");
continue;
}
Float[] arrayDataX = new Float[dataSize];
Float[] arrayDataY = new Float[dataSize];
int i = 0;
for (Double data : dataset) {
Double per = (data - dataAxis.getAxisMin()) / dataAxis.getAxisRange();
float curRadius = (float) (getRadius() * per);
// 计算位置
MathHelper.getInstance().calcArcEndPointXY(cirX, cirY, curRadius, mArrayLabelAgent[i]);
// 依Path还是Line来决定画线风格
arrayDataX[i] = MathHelper.getInstance().getPosX();
arrayDataY[i] = MathHelper.getInstance().getPosY();
i++; // 标签
}
// 画线或填充
switch (lineData.getAreaStyle()) {
case FILL:
drawDataPath(canvas, lineData, arrayDataX, arrayDataY);
break;
case STROKE:
renderDataLine(canvas, lineData, arrayDataX, arrayDataY);
break;
default:
Log.e(TAG, "这类型不认识.");
}
}
}
/**
* 轴线上tick总个数
*
* @return 总个数
*/
private int getAxisTickCount() {
return (int) Math.round(dataAxis.getAixTickCount() + 1);
}