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inline ScrollGroup::canvas_position() for no particular reason

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This commit is contained in:
Paul Davis 2014-05-21 19:13:26 -04:00
parent 893452b388
commit 2b361eecec
2 changed files with 19 additions and 12 deletions
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10
libs/canvas/canvas/scroll_group.h
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@ -35,8 +35,16 @@ class LIBCANVAS_API ScrollGroup : public Group
explicit ScrollGroup (Group *, Duple, ScrollSensitivity);
void scroll_to (Duple const& d);
Duple canvas_position() const;
/** return the normal "base" position of this item
rather its position as affected by any scroll
offset.
*/
Duple canvas_position() const {
return _position.translate (_scroll_offset);
}
Duple scroll_offset() const { return _scroll_offset; }
private:
ScrollSensitivity _scroll_sensitivity;
Duple _scroll_offset;

21
libs/canvas/scroll_group.cc
View file

@ -37,27 +37,26 @@ ScrollGroup::ScrollGroup (Group* parent, Duple position, ScrollSensitivity s)
void
ScrollGroup::scroll_to (Duple const& d)
{
Duple base_pos (position().translate (_scroll_offset));
/* get the nominal position of the group without scroll being in effect
*/
Duple base_pos (_position.translate (_scroll_offset));
/* compute a new position given our sensitivity to h- and v-scrolling
*/
if (_scroll_sensitivity & ScrollsHorizontally) {
base_pos.x -= d.x;
_scroll_offset.x = d.x;
}
}
if (_scroll_sensitivity & ScrollsVertically) {
base_pos.y -= d.y;
_scroll_offset.y = d.y;
}
/* move there */
set_position (base_pos);
}
Duple
ScrollGroup::canvas_position() const
{
/* return the normal "base" position of this item
rather its position as affected by any scroll
offset.
*/
return _position.translate (_scroll_offset);
}