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lincoln's patch for scroomer pinching, from #3222

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git-svn-id: svn://localhost/ardour2/branches/3.0@7786 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2010-09-16 16:18:50 +00:00
parent 8e00b86ebb
commit 64ccab5227
2 changed files with 31 additions and 17 deletions
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1
libs/gtkmm2ext/gtkmm2ext/scroomer.h
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@ -81,6 +81,7 @@ private:
double grab_y;
double unzoomed_val;
double unzoomed_page;
bool pinch;
};
} // namespace

47
libs/gtkmm2ext/scroomer.cc
View File

@ -103,17 +103,33 @@ Scroomer::on_motion_notify_event (GdkEventMotion* ev)
unzoomed_val = max(unzoomed_val, adj.get_lower());
break;
case Handle1:
unzoomed_page += scale * fract * range;
unzoomed_page = min(unzoomed_page, adj.get_upper() - unzoomed_val);
unzoomed_page = max(unzoomed_page, min_page_size);
if (pinch){
temp = unzoomed_val + unzoomed_page;
unzoomed_val -= scale * fract * range * 0.5;
unzoomed_val = min(unzoomed_val, temp - min_page_size);
unzoomed_val = max(unzoomed_val, adj.get_lower());
}
break;
case Handle2:
temp = unzoomed_val + unzoomed_page;
unzoomed_val += scale * fract * range;
unzoomed_val = min(unzoomed_val, temp - min_page_size);
unzoomed_val = max(unzoomed_val, adj.get_lower());
unzoomed_page = temp - unzoomed_val;
if (pinch){
unzoomed_page -= scale * fract * range;
}
unzoomed_page = min(unzoomed_page, adj.get_upper() - unzoomed_val);
unzoomed_page = max(unzoomed_page, min_page_size);
break;
default:
@ -178,28 +194,18 @@ Scroomer::on_motion_notify_event (GdkEventMotion* ev)
val = unzoomed_val;
page = unzoomed_page;
}
adj.set_page_size(page);
if (val == adj.get_value()) {
adj.value_changed();
}
if (val < adj.get_lower()) {
adj.value_changed();
} else if (val > adj.get_upper()) {
adj.value_changed();
} else {
adj.set_value(val);
}
adj.set_page_size(page);
adj.set_value(val);
adj.value_changed();
return true;
}
bool
Scroomer::on_button_press_event (GdkEventButton* ev)
{
if (ev->button == 1) {
if (ev->button == 1 || ev->button == 3) {
Component comp = point_in(ev->y);
if (comp == Total || comp == None) {
@ -212,7 +218,14 @@ Scroomer::on_button_press_event (GdkEventButton* ev)
unzoomed_val = adj.get_value();
unzoomed_page = adj.get_page_size();
grab_window = ev->window;
if (ev->button == 3){
pinch = true;
} else {
pinch = false;
}
}
return false;
}
@ -229,7 +242,7 @@ Scroomer::on_button_release_event (GdkEventButton* ev)
return true;
}
if (ev->button != 1) {
if (ev->button != 1 && ev->button != 3) {
return true;
}