@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (mScroller != null) {
mScroller.onSizeChanged(w, h, oldw, oldh);
}
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
// Overlay index bar
if (mScroller != null) mScroller.draw(canvas);
}
@Override
public void setAdapter(ListAdapter adapter) {
super.setAdapter(adapter);
if (mScroller != null) {
mScroller.setAdapter(adapter);
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if (mScroller.contains(ev.getX(), ev.getY())) {
return true;
}
return super.onInterceptTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
// Intercept ListView's touch event
if (mScroller != null && mScroller.onTouchEvent(ev)) {
return true;
}
if (mGestureDetector == null) {
// Create a new GestureDetector -- 手势探测器
mGestureDetector =
new GestureDetector(
getContext(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onFling(
MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
if (mScroller != null) {
mScroller.show();
}
return super.onFling(e1, e2, velocityX, velocityY);
}
});
}
mGestureDetector.onTouchEvent(ev);
return super.onTouchEvent(ev);
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (mScroller != null) {
mScroller.draw(canvas);
}
}
// @Override
public void setFastScrollEnabled(boolean enabled) {
mIsFastScrollEnabled = enabled;
if (mIsFastScrollEnabled) {
if (mScroller == null) mScroller = new IndexScroller(getContext(), this);
} else {
if (mScroller != null) {
mScroller.hide();
mScroller = null;
}
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
// Intercept ListView's touch event
if (mScroller != null && mScroller.onTouchEvent(ev)) return true;
if (mGestureDetector == null) {
mGestureDetector =
new GestureDetector(
getContext(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onFling(
MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
// If fling happens, index bar shows
if (mScroller != null) mScroller.show();
return super.onFling(e1, e2, velocityX, velocityY);
}
});
}
mGestureDetector.onTouchEvent(ev);
return super.onTouchEvent(ev);
}