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remove global canvas scroll offset, to provide no-scroll-parent == no-scroll behaviour

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This commit is contained in:
Paul Davis 2014-06-09 08:39:38 -04:00
parent 8fe593fcca
commit f0c18abf55
3 changed files with 4 additions and 11 deletions
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10
libs/canvas/canvas.cc
View file

@ -48,8 +48,6 @@ Canvas::Canvas ()
void
Canvas::scroll_to (Coord x, Coord y)
{
_scroll_offset = Duple (x, y);
/* We do things this way because we do not want to recurse through
the canvas for every scroll. In the presence of large MIDI
tracks this means traversing item lists that include
@ -61,7 +59,7 @@ Canvas::scroll_to (Coord x, Coord y)
*/
for (list<ScrollGroup*>::iterator i = scrollers.begin(); i != scrollers.end(); ++i) {
(*i)->scroll_to (_scroll_offset);
(*i)->scroll_to (Duple (x, y));
}
pick_current_item (0); // no current mouse position
@ -225,9 +223,7 @@ Canvas::window_to_canvas (Duple const & d) const
return d.translate (sg->scroll_offset());
}
/* fallback to global canvas offset ... it would be nice to remove this */
return d.translate (_scroll_offset);
return d;
}
Duple
@ -252,7 +248,7 @@ Canvas::canvas_to_window (Duple const & d, bool rounded) const
if (sg) {
wd = d.translate (-sg->scroll_offset());
} else {
wd = d.translate (-_scroll_offset);
wd = d;
}
/* Note that this intentionally almost always returns integer coordinates */

3
libs/canvas/canvas/canvas.h
View file

@ -107,7 +107,6 @@ public:
}
void scroll_to (Coord x, Coord y);
Duple scroll_offset() const { return _scroll_offset; }
void add_scroller (ScrollGroup& i);
virtual Rect visible_area () const = 0;
@ -126,8 +125,6 @@ protected:
/** our root group */
RootGroup _root;
Duple _scroll_offset;
virtual void pick_current_item (int state) = 0;
virtual void pick_current_item (Duple const &, int state) = 0;

2
libs/canvas/item.cc
View file

@ -114,7 +114,7 @@ Item::scroll_offset () const
if (_scroll_parent) {
return _scroll_parent->scroll_offset();
}
return _canvas->scroll_offset();
return Duple (0,0);
}
Duple