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Improved track drop code

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This commit is contained in:
Joel Holdsworth 2009-01-21 18:20:11 +00:00
parent 78e0f9bbe6
commit 1472a2ebe4
2 changed files with 26 additions and 18 deletions
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40
src/gui/widgets/timeline/timeline-layout-helper.cpp
View file

@ -138,11 +138,13 @@ TimelineLayoutHelper::begin_dragging_track(
if(!draggingTrack)
return shared_ptr<timeline::Track>();
dragPoint = Gdk::Point(mouse_point.get_x(),
mouse_point.get_y() + timelineWidget.get_y_scroll_offset());
const Gdk::Rectangle &rect = headerBoxes[draggingTrack];
dragStartOffset = Gdk::Point(
mouse_point.get_x() - rect.get_x(),
mouse_point.get_y() - rect.get_y() +
timelineWidget.get_y_scroll_offset());
dragPoint.get_x() - rect.get_x(),
dragPoint.get_y() - rect.get_y());
const shared_ptr<model::Track> model_track =
draggingTrack->get_model_track();
@ -176,9 +178,21 @@ void
TimelineLayoutHelper::drag_to_point(const Gdk::Point &point)
{
// Apply the scroll offset
const Gdk::Point last_point(dragPoint);
dragPoint = Gdk::Point(point.get_x(),
point.get_y() + timelineWidget.get_y_scroll_offset());
// Get a test-point
// We probe on the bottom edge of the dragging branch if the track is
// being dragged downward, and on the top edge if it's being dragged
// upward.
Gdk::Point test_point(dragPoint.get_x(),
dragPoint.get_y() - dragStartOffset.get_y());
if(last_point.get_y() > dragPoint.get_y())
test_point.set_y(test_point.get_y());
else
test_point.set_y(test_point.get_y() + dragBranchHeight);
// Search the headers
TrackTree::pre_order_iterator iterator;
@ -208,10 +222,11 @@ TimelineLayoutHelper::drag_to_point(const Gdk::Point &point)
const int x_mid = rect.get_x() + rect.get_width() / 2;
// Do hit test
if(attempt_drop_upper(iterator, y, full_width, half_height))
if(attempt_drop_upper(iterator, test_point, y,
full_width, half_height))
break;
if(attempt_drop_lower(iterator,
if(attempt_drop_lower(iterator, test_point,
x_mid, full_width, y_mid, half_height))
break;
}
@ -221,13 +236,9 @@ TimelineLayoutHelper::drag_to_point(const Gdk::Point &point)
bool
TimelineLayoutHelper::attempt_drop_upper(
TrackTree::pre_order_iterator target, const int y,
const int full_width, const int half_height)
{
const Gdk::Point point(dragPoint.get_x(),
dragPoint.get_y() - dragStartOffset.get_y() +
dragBranchHeight);
TrackTree::pre_order_iterator target, const Gdk::Point &point,
const int y, const int full_width, const int half_height)
{
if(pt_in_rect(point, Gdk::Rectangle(0, y, full_width, half_height)))
{
draggingTrackIter = layoutTree.move_before(
@ -239,15 +250,12 @@ TimelineLayoutHelper::attempt_drop_upper(
bool
TimelineLayoutHelper::attempt_drop_lower(
TrackTree::pre_order_iterator target,
TrackTree::pre_order_iterator target, const Gdk::Point &point,
const int x_mid, const int full_width, const int y_mid,
const int half_height)
{
const shared_ptr<model::Track> model_track(*target);
REQUIRE(model_track);
const Gdk::Point point(dragPoint.get_x(),
dragPoint.get_y() - dragStartOffset.get_y());
if(!pt_in_rect(point, Gdk::Rectangle(0, y_mid,
full_width, half_height)))

4
src/gui/widgets/timeline/timeline-layout-helper.hpp
View file

@ -223,11 +223,11 @@ protected:
bool on_animation_tick();
bool
attempt_drop_upper(TrackTree::pre_order_iterator target, const int y, const int full_width, const int half_height);
attempt_drop_upper(TrackTree::pre_order_iterator target, const Gdk::Point &point, const int y, const int full_width, const int half_height);
bool
attempt_drop_lower(TrackTree::pre_order_iterator target, const int x_mid, const int full_width, const int y_mid, const int half_height);
attempt_drop_lower(TrackTree::pre_order_iterator target, const Gdk::Point &point, const int x_mid, const int full_width, const int y_mid, const int half_height);
protected: