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timeline: show transition tool overlay

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This commit is contained in:
itsmattkc
2021-07-20 20:07:44 -07:00
parent a0719701cf
commit 841e9086bc
6 changed files with 145 additions and 42 deletions
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app/widget/timelinewidget/tool/transition.cpp
+74 -41
View File
@@ -34,64 +34,49 @@ TransitionTool::TransitionTool(TimelineWidget *parent) :
{
}
void TransitionTool::HoverMove(TimelineViewMouseEvent *event)
{
ClipBlock *primary = nullptr;
ClipBlock *secondary = nullptr;
Timeline::MovementMode trim_mode;
rational transition_start_point;
GetBlocksAtCoord(event->GetCoordinates(), &primary, &secondary, &trim_mode, &transition_start_point);
if (trim_mode == Timeline::kTrimIn) {
std::swap(primary, secondary);
}
parent()->SetViewTransitionOverlay(primary, secondary);
}
void TransitionTool::MousePress(TimelineViewMouseEvent *event)
{
const Track::Reference& track = event->GetTrack();
Track* t = parent()->GetTrackFromReference(track);
rational cursor_frame = event->GetFrame();
if (!t || t->IsLocked()) {
return;
}
Block* block_at_time = t->BlockAtTime(event->GetFrame());
if (!dynamic_cast<ClipBlock*>(block_at_time)) {
return;
}
// Determine which side of the clip the transition belongs to
rational transition_start_point;
ClipBlock *primary, *secondary;
Timeline::MovementMode trim_mode;
rational halfway_point = block_at_time->in() + block_at_time->length() / 2;
rational tenth_point = block_at_time->in() + block_at_time->length() / 10;
Block* other_block = nullptr;
if (cursor_frame < halfway_point) {
transition_start_point = block_at_time->in();
trim_mode = Timeline::kTrimIn;
if (cursor_frame < tenth_point
&& dynamic_cast<ClipBlock*>(block_at_time->previous())) {
other_block = block_at_time->previous();
}
} else {
transition_start_point = block_at_time->out();
trim_mode = Timeline::kTrimOut;
dual_transition_ = (cursor_frame > block_at_time->length() - tenth_point);
if (cursor_frame > block_at_time->length() - tenth_point
&& dynamic_cast<ClipBlock*>(block_at_time->next())) {
other_block = block_at_time->next();
}
rational transition_start_point;
if (!GetBlocksAtCoord(event->GetCoordinates(), &primary, &secondary, &trim_mode, &transition_start_point)) {
return;
}
// Create ghost
ghost_ = new TimelineViewGhostItem();
ghost_->SetTrack(track);
ghost_->SetTrack(event->GetTrack());
ghost_->SetIn(transition_start_point);
ghost_->SetOut(transition_start_point);
ghost_->SetMode(trim_mode);
ghost_->SetData(TimelineViewGhostItem::kAttachedBlock, Node::PtrToValue(block_at_time));
ghost_->SetData(TimelineViewGhostItem::kAttachedBlock, Node::PtrToValue(primary));
dual_transition_ = (other_block);
if (other_block)
ghost_->SetData(TimelineViewGhostItem::kReferenceBlock, Node::PtrToValue(other_block));
dual_transition_ = (secondary);
if (secondary)
ghost_->SetData(TimelineViewGhostItem::kReferenceBlock, Node::PtrToValue(secondary));
parent()->AddGhost(ghost_);
snap_points_.append(transition_start_point);
// Set the drag start point
drag_start_point_ = cursor_frame;
drag_start_point_ = event->GetFrame();
}
void TransitionTool::MouseMove(TimelineViewMouseEvent *event)
@@ -175,4 +160,52 @@ void TransitionTool::MouseRelease(TimelineViewMouseEvent *event)
}
}
bool TransitionTool::GetBlocksAtCoord(const TimelineCoordinate &coord, ClipBlock **primary, ClipBlock **secondary, Timeline::MovementMode *ptrim_mode, rational *start_point)
{
const Track::Reference& track = coord.GetTrack();
Track* t = parent()->GetTrackFromReference(track);
rational cursor_frame = coord.GetFrame();
if (!t || t->IsLocked()) {
return false;
}
Block* block_at_time = t->BlockAtTime(coord.GetFrame());
if (!dynamic_cast<ClipBlock*>(block_at_time)) {
return false;
}
// Determine which side of the clip the transition belongs to
rational transition_start_point;
Timeline::MovementMode trim_mode;
rational halfway_point = block_at_time->in() + block_at_time->length() / 2;
rational tenth_point = block_at_time->in() + block_at_time->length() / 10;
Block* other_block = nullptr;
if (cursor_frame < halfway_point) {
transition_start_point = block_at_time->in();
trim_mode = Timeline::kTrimIn;
if (cursor_frame < tenth_point
&& dynamic_cast<ClipBlock*>(block_at_time->previous())) {
other_block = block_at_time->previous();
}
} else {
transition_start_point = block_at_time->out();
trim_mode = Timeline::kTrimOut;
dual_transition_ = (cursor_frame > block_at_time->length() - tenth_point);
if (cursor_frame > block_at_time->length() - tenth_point
&& dynamic_cast<ClipBlock*>(block_at_time->next())) {
other_block = block_at_time->next();
}
}
*primary = static_cast<ClipBlock*>(block_at_time);
*secondary = static_cast<ClipBlock*>(other_block);
*ptrim_mode = trim_mode;
*start_point = transition_start_point;
return true;
}
}