protected void calcDataValueRange() {
double maxValue = Double.MIN_VALUE;
double minValue = Double.MAX_VALUE;
IMeasurable first = this.stickData.get(0);
// 第一个stick为停盘的情况
if (first.getHigh() == 0 && first.getLow() == 0) {
} else {
maxValue = first.getHigh();
minValue = first.getLow();
}
// 判断显示为方柱或显示为线条
for (int i = this.displayFrom; i < this.displayFrom + this.displayNumber; i++) {
IMeasurable stick = this.stickData.get(i);
if (stick.getLow() < minValue) {
minValue = stick.getLow();
}
if (stick.getHigh() > maxValue) {
maxValue = stick.getHigh();
}
}
this.maxValue = maxValue;
this.minValue = minValue;
}
protected void drawSticks(Canvas canvas) {
if (null == stickData) {
return;
}
if (stickData.size() == 0) {
return;
}
Paint mPaintStick = new Paint();
mPaintStick.setColor(stickFillColor);
float stickWidth = getDataQuadrantPaddingWidth() / displayNumber - stickSpacing;
float stickX = getDataQuadrantPaddingStartX();
for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
IMeasurable stick = stickData.get(i);
float highY =
(float)
((1f - (stick.getHigh() - minValue) / (maxValue - minValue))
* (getDataQuadrantPaddingHeight())
+ getDataQuadrantPaddingStartY());
float lowY =
(float)
((1f - (stick.getLow() - minValue) / (maxValue - minValue))
* (getDataQuadrantPaddingHeight())
+ getDataQuadrantPaddingStartY());
// stick or line?
if (stickWidth >= 2f) {
canvas.drawRect(stickX, highY, stickX + stickWidth, lowY, mPaintStick);
} else {
canvas.drawLine(stickX, highY, stickX, lowY, mPaintStick);
}
// next x
stickX = stickX + stickSpacing + stickWidth;
}
}