TouchImageView.java 文件源码

DoubleTapZoom(float targetZoom, float focusX, float focusY, boolean stretchImageToSuper) {
    setState(State.ANIMATE_ZOOM);
    startTime = System.currentTimeMillis();
    this.startZoom = normalizedScale;
    this.targetZoom = targetZoom;
    this.stretchImageToSuper = stretchImageToSuper;
    PointF bitmapPoint = transformCoordTouchToBitmap(focusX, focusY, false);
    this.bitmapX = bitmapPoint.x;
    this.bitmapY = bitmapPoint.y;

    //
    // Used for translating image during scaling
    //
    startTouch = transformCoordBitmapToTouch(bitmapX, bitmapY);
    endTouch = new PointF(viewWidth / 2, viewHeight / 2);
}