ColorPickerView.java 文件源码

private void drawSatValPanel(Canvas canvas) {
    RectF rect = this.mSatValRect;
    this.mBorderPaint.setColor(this.mBorderColor);
    canvas.drawRect(this.mDrawingRect.left, this.mDrawingRect.top, BORDER_WIDTH_PX + rect.right, BORDER_WIDTH_PX + rect.bottom, this.mBorderPaint);
    if (this.mValShader == null) {
        this.mValShader = new LinearGradient(rect.left, rect.top, rect.left, rect.bottom, -1, ViewCompat.MEASURED_STATE_MASK, TileMode.CLAMP);
    }
    this.mSatShader = new LinearGradient(rect.left, rect.top, rect.right, rect.top, -1, Color.HSVToColor(new float[]{this.mHue, BORDER_WIDTH_PX, BORDER_WIDTH_PX}), TileMode.CLAMP);
    this.mSatValPaint.setShader(new ComposeShader(this.mValShader, this.mSatShader, Mode.MULTIPLY));
    canvas.drawRect(rect, this.mSatValPaint);
    Point p = satValToPoint(this.mSat, this.mVal);
    this.mSatValTrackerPaint.setColor(ViewCompat.MEASURED_STATE_MASK);
    canvas.drawCircle((float) p.x, (float) p.y, this.PALETTE_CIRCLE_TRACKER_RADIUS - (BORDER_WIDTH_PX * this.mDensity), this.mSatValTrackerPaint);
    this.mSatValTrackerPaint.setColor(0xffdddddd);
    canvas.drawCircle((float) p.x, (float) p.y, this.PALETTE_CIRCLE_TRACKER_RADIUS, this.mSatValTrackerPaint);
}