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Stop automation drags when they hit their lowest point, so as to prevent automation curves being lost by dragging things too far downwards. 

git-svn-id: svn://localhost/ardour2/branches/3.0@6434 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Carl Hetherington 2010-01-02 01:32:14 +00:00
parent 85d0894475
commit 9a6532def2
1 changed files with 9 additions and 2 deletions
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11
gtk2_ardour/automation_line.cc
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@ -767,10 +767,17 @@ AutomationLine::drag_motion (nframes_t x, float fraction, bool with_push)
drag_distance += dx;
drag_x = x;
double const dy = fraction - _last_drag_fraction;
double dy = fraction - _last_drag_fraction;
_last_drag_fraction = fraction;
/* clamp y so that the "lowest" point hits the bottom but goes no further */
for (list<ControlPoint*>::iterator i = _drag_points.begin(); i != _drag_points.end(); ++i) {
double const y = ((_height - (*i)->get_y()) / _height) + dy;
if (y < 0) {
dy -= y;
}
}
for (list<ControlPoint*>::iterator i = _drag_points.begin(); i != _drag_points.end(); ++i) {
modify_view_point (