ardour/livetrax
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Handle discontiguous control point selections properly when dragging.

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git-svn-id: svn://localhost/ardour2/branches/3.0@12505 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Carl Hetherington 2012-05-31 17:08:00 +00:00
parent d4af4d99e9
commit 411a534c38
1 changed files with 30 additions and 22 deletions
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52
gtk2_ardour/automation_line.cc
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@ -465,7 +465,7 @@ AutomationLine::start_drag_common (double x, float fraction)
* @return x position and y fraction that were actually used (once clamped).
*/
pair<double, float>
AutomationLine::drag_motion (double x, float fraction, bool ignore_x, bool with_push)
AutomationLine::drag_motion (double const x, float fraction, bool ignore_x, bool with_push)
{
/* setup the points that are to be moved this time round */
list<ControlPoint*> points = _drag_points;
@ -477,28 +477,36 @@ AutomationLine::drag_motion (double x, float fraction, bool ignore_x, bool with_
double dx = ignore_x ? 0 : (x - _drag_x);
double dy = fraction - _last_drag_fraction;
/* find x limits */
ControlPoint* before = 0;
ControlPoint* after = 0;
for (vector<ControlPoint*>::iterator i = control_points.begin(); i != control_points.end(); ++i) {
if ((*i)->get_x() < points.front()->get_x()) {
before = *i;
}
if ((*i)->get_x() > points.back()->get_x() && after == 0) {
after = *i;
}
}
double const before_x = before ? before->get_x() : 0;
double const after_x = after ? after->get_x() : DBL_MAX;
/* clamp x */
for (list<ControlPoint*>::iterator i = points.begin(); i != points.end(); ++i) {
if ((*i)->can_slide() && !ignore_x) {
x = max (x, before_x);
x = min (x, after_x);
/* Find the points before and after this one on the control_points list */
ControlPoint* before = 0;
ControlPoint* after = 0;
ControlPoint* last = 0;
for (vector<ControlPoint*>::iterator j = control_points.begin(); j != control_points.end(); ++j) {
if (*j == *i) {
before = last;
vector<ControlPoint*>::iterator k = j;
++k;
if (k != control_points.end()) {
after = *k;
}
break;
}
last = *j;
}
/* Clamp dx for this point */
double const before_x = before ? before->get_x() : 0;
double const after_x = after ? after->get_x() : DBL_MAX;
double tx = (*i)->get_x() + dx;
tx = max (tx, before_x);
tx = min (tx, after_x);
dx = tx - (*i)->get_x ();
}
/* clamp y */
@ -514,7 +522,7 @@ AutomationLine::drag_motion (double x, float fraction, bool ignore_x, bool with_
pair<double, float> const clamped (_drag_x + dx, _last_drag_fraction + dy);
_drag_distance += dx;
_drag_x = x;
_drag_x += dx;
_last_drag_fraction = fraction;
for (list<ControlPoint*>::iterator i = _drag_points.begin(); i != _drag_points.end(); ++i) {