TouchImageView.java 文件源码

Fling(int velocityX, int velocityY) {
    setState(State.FLING);
    scroller = new CompatScroller(context);
    matrix.getValues(m);

    int startX = (int) m[Matrix.MTRANS_X];
    int startY = (int) m[Matrix.MTRANS_Y];
    int minX, maxX, minY, maxY;

    if (getImageWidth() > viewWidth) {
        minX = viewWidth - (int) getImageWidth();
        maxX = 0;

    } else {
        minX = maxX = startX;
    }

    if (getImageHeight() > viewHeight) {
        minY = viewHeight - (int) getImageHeight();
        maxY = 0;

    } else {
        minY = maxY = startY;
    }

    scroller.fling(startX, startY, velocityX, velocityY, minX,
            maxX, minY, maxY);
    currX = startX;
    currY = startY;
}