private boolean motionZoom(MotionEvent event) {
switch (event.getActionMasked()) {
case MotionEvent.ACTION_MOVE:
if (m_status == STA_ZOOM) {
float dx = event.getX(0) - event.getX(1);
float dy = event.getY(0) - event.getY(1);
m_zoom_dis2 = Global.sqrtf(dx * dx + dy * dy);
float scale = m_zoom_scale * m_zoom_dis2 / m_zoom_dis1;
if (m_scale / scale > 1.0001 || m_scale / scale < 0.999) {
m_scale = scale;
vLayout();
vSetPos(m_zoom_pos, (int) m_holdx, (int) m_holdy);
}
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
case MotionEvent.ACTION_CANCEL:
if (m_status == STA_ZOOM) {
m_status = STA_NONE;
float dx = event.getX(0) - event.getX(1);
float dy = event.getY(0) - event.getY(1);
m_zoom_dis2 = Global.sqrtf(dx * dx + dy * dy);
float scale = m_zoom_scale * m_zoom_dis2 / m_zoom_dis1;
if (m_scale / scale > 1.0001 || m_scale / scale < 0.999) {
m_scale = scale;
vLayout();
vSetPos(m_zoom_pos, (int) m_holdx, (int) m_holdy);
}
if (m_listener != null) {
m_listener.OnPDFInvalidate(false);
m_listener.OnPDFZoomEnd();
}
vOnZoomEnd();
}
break;
}
return true;
}
