652 lines
22 KiB
C++
652 lines
22 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "widget/timelinewidget/timelinewidget.h"
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#include <QDebug>
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#include <QToolTip>
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#include "common/clamp.h"
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#include "common/flipmodifiers.h"
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#include "common/qtutils.h"
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#include "common/range.h"
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#include "common/timecodefunctions.h"
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#include "config/config.h"
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#include "core.h"
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#include "node/block/gap/gap.h"
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#include "node/block/transition/transition.h"
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#include "widget/nodeview/nodeviewundo.h"
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OLIVE_NAMESPACE_ENTER
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TimelineWidget::PointerTool::PointerTool(TimelineWidget *parent) :
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Tool(parent),
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movement_allowed_(true),
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trimming_allowed_(true),
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track_movement_allowed_(true),
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trim_overwrite_allowed_(false),
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gap_trimming_allowed_(false),
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rubberband_selecting_(false)
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{
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}
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void TimelineWidget::PointerTool::MousePress(TimelineViewMouseEvent *event)
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{
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// Determine if item clicked on is selectable
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clicked_item_ = GetItemAtScenePos(event->GetCoordinates());
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bool selectable_item = (clicked_item_
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&& clicked_item_->flags() & QGraphicsItem::ItemIsSelectable
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&& !parent()->GetTrackFromReference(clicked_item_->Track())->IsLocked());
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if (selectable_item) {
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// Cache the clip's type for use later
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drag_track_type_ = clicked_item_->Track().type();
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// If we haven't started dragging yet, we'll initiate a drag here
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// Record where the drag started in timeline coordinates
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drag_start_ = event->GetCoordinates();
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// Determine whether we're trimming or moving based on the position of the cursor
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drag_movement_mode_ = IsCursorInTrimHandle(clicked_item_,
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event->GetSceneX());
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// If we're not in a trim mode, we must be in a move mode (provided the tool allows movement and
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// the block is not a gap)
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if (drag_movement_mode_ == Timeline::kNone
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&& movement_allowed_
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&& clicked_item_->block()->type() != Block::kGap) {
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drag_movement_mode_ = Timeline::kMove;
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}
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// If this item is already selected, no further selection needs to be made
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if (clicked_item_->isSelected()) {
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// If shift is held, deselect it
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if (event->GetModifiers() & Qt::ShiftModifier) {
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clicked_item_->setSelected(false);
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// If not holding alt, deselect all links as well
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if (!(event->GetModifiers() & Qt::AltModifier)) {
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parent()->SetBlockLinksSelected(clicked_item_->block(), false);
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}
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}
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return;
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}
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}
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// If not holding shift, deselect all clips
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if (!(event->GetModifiers() & Qt::ShiftModifier)) {
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parent()->DeselectAll();
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}
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if (selectable_item) {
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// Select this item
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clicked_item_->setSelected(true);
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// If not holding alt, select all links as well
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if (!(event->GetModifiers() & Qt::AltModifier)) {
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parent()->SetBlockLinksSelected(clicked_item_->block(), true);
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}
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} else if (event->GetButton() == Qt::LeftButton) {
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// Start rubberband drag
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parent()->StartRubberBandSelect(true, !(event->GetModifiers() & Qt::AltModifier));
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rubberband_selecting_ = true;
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}
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}
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void TimelineWidget::PointerTool::MouseMove(TimelineViewMouseEvent *event)
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{
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if (rubberband_selecting_) {
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// Process rubberband select
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parent()->MoveRubberBandSelect(true, !(event->GetModifiers() & Qt::AltModifier));
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return;
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}
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if (!dragging_) {
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// Now that the cursor has moved, we will assume the intention is to drag
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// Clear snap points
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snap_points_.clear();
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// If we're performing an action, we can initiate ghosts
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if (drag_movement_mode_ != Timeline::kNone) {
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InitiateDrag(clicked_item_, drag_movement_mode_);
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}
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// Set dragging to true here so no matter what, the drag isn't re-initiated until it's completed
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dragging_ = true;
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}
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if (dragging_ && !parent()->ghost_items_.isEmpty()) {
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// We're already dragging AND we have ghosts to work with
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ProcessDrag(event->GetCoordinates());
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}
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}
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void TimelineWidget::PointerTool::MouseRelease(TimelineViewMouseEvent *event)
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{
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if (rubberband_selecting_) {
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// Finish rubberband select
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parent()->EndRubberBandSelect(true, !(event->GetModifiers() & Qt::AltModifier));
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rubberband_selecting_ = false;
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return;
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}
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if (dragging_) {
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if (!parent()->ghost_items_.isEmpty()) {
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FinishDrag(event);
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}
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parent()->ClearGhosts();
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snap_points_.clear();
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dragging_ = false;
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}
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}
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void TimelineWidget::PointerTool::HoverMove(TimelineViewMouseEvent *event)
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{
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if (trimming_allowed_) {
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// No dragging, but we still want to process cursors
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TimelineViewBlockItem* block_at_cursor = GetItemAtScenePos(event->GetCoordinates());
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if (block_at_cursor) {
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switch (IsCursorInTrimHandle(block_at_cursor, event->GetSceneX())) {
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case Timeline::kTrimIn:
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parent()->setCursor(Qt::SizeHorCursor);
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break;
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case Timeline::kTrimOut:
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parent()->setCursor(Qt::SizeHorCursor);
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break;
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default:
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parent()->unsetCursor();
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}
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} else {
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parent()->unsetCursor();
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}
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} else {
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parent()->unsetCursor();
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}
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}
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void TimelineWidget::PointerTool::FinishDrag(TimelineViewMouseEvent *event)
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{
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QList<TimelineViewGhostItem*> ghosts_moving;
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QList<Block*> blocks_moving;
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QList<TimelineViewGhostItem*> ghosts_trimming;
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QList<Block*> blocks_trimming;
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foreach (TimelineViewGhostItem* ghost, parent()->ghost_items_) {
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if (!ghost->HasBeenAdjusted()) {
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continue;
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}
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Block* b = Node::ValueToPtr<Block>(ghost->data(TimelineViewGhostItem::kAttachedBlock));
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if (ghost->mode() == Timeline::kMove) {
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ghosts_moving.append(ghost);
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blocks_moving.append(b);
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} else if (Timeline::IsATrimMode(ghost->mode())) {
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ghosts_trimming.append(ghost);
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blocks_trimming.append(b);
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}
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}
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if (blocks_moving.isEmpty() && blocks_trimming.isEmpty()) {
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// Likely means no block was adjusted, so we can skip the rest of the processing
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return;
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}
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// See if we're duplicated because ALT is held (only moved blocks can duplicate)
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bool duplicate_clips = (!blocks_moving.isEmpty() && event->GetModifiers() & Qt::AltModifier);
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bool inserting = (!blocks_moving.isEmpty() && event->GetModifiers() & Qt::ControlModifier);
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QUndoCommand* command = new QUndoCommand();
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for (int i=0;i<ghosts_trimming.size();i++) {
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TimelineViewGhostItem* ghost = ghosts_trimming.at(i);
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new BlockTrimCommand(parent()->GetTrackFromReference(ghost->GetAdjustedTrack()),
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blocks_trimming.at(i),
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ghost->AdjustedLength(),
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ghost->mode(),
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command);
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}
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if (!blocks_moving.isEmpty()) {
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// If we're not duplicating, "remove" the clips and replace them with gaps
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if (!duplicate_clips) {
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parent()->DeleteSelectedInternal(blocks_moving, false, false, command);
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}
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if (inserting) {
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// If we're inserting, ripple everything at the destination with gaps
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InsertGapsAtGhostDestination(parent()->ghost_items_, command);
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}
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/*
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QList<TrackReference> tracks_affected;
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*/
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// Now we can re-add each clip
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for (int i=0;i<ghosts_moving.size();i++) {
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TimelineViewGhostItem* ghost = ghosts_moving.at(i);
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Block* block = blocks_moving.at(i);
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/*
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if (!tracks_affected.contains(ghost->GetAdjustedTrack())) {
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tracks_affected.append(ghost->GetAdjustedTrack());
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}
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*/
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if (duplicate_clips) {
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// Duplicate rather than move
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Node* copy = block->copy();
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new NodeAddCommand(static_cast<NodeGraph*>(block->parent()),
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copy,
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command);
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new NodeCopyInputsCommand(block, copy, true, command);
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// Place the copy instead of the original block
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block = static_cast<Block*>(copy);
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/*
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} else if (!tracks_affected.contains(ghost->Track())) {
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// Block moved from its original position. Mark its track as affected.
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tracks_affected.append(ghost->Track());
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*/
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}
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const TrackReference& track_ref = ghost->GetAdjustedTrack();
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new TrackPlaceBlockCommand(parent()->GetConnectedNode()->track_list(track_ref.type()),
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track_ref.index(),
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block,
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ghost->GetAdjustedIn(),
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command);
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}
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/*
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foreach (const TrackReference& t, tracks_affected) {
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new TrackCleanGapsCommand(parent()->GetConnectedNode()->track_list(t.type()),
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t.index(),
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command);
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}
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*/
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// FIXME: Heavy optimization since MOST of the timeline does NOT change in this time
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}
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Core::instance()->undo_stack()->pushIfHasChildren(command);
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}
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void TimelineWidget::PointerTool::ProcessDrag(const TimelineCoordinate &mouse_pos)
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{
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// Calculate track movement
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int track_movement = track_movement_allowed_
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? mouse_pos.GetTrack().index() - drag_start_.GetTrack().index()
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: 0;
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// Determine frame movement
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rational time_movement = mouse_pos.GetFrame() - drag_start_.GetFrame();
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// Perform snapping if enabled (adjusts time_movement if it's close to any potential snap points)
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if (Core::instance()->snapping()) {
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SnapPoint(snap_points_, &time_movement);
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}
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// Validate movement (enforce all ghosts moving in legal ways)
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// NOTE: Always do this after snapping to ensure the snap hasn't made an illegal movement.
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time_movement = ValidateTimeMovement(time_movement, parent()->ghost_items_);
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time_movement = ValidateInTrimming(time_movement, parent()->ghost_items_, !trim_overwrite_allowed_);
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time_movement = ValidateOutTrimming(time_movement, parent()->ghost_items_, !trim_overwrite_allowed_);
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// Validate ghosts that are being moved (clips from other track types do NOT get moved)
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{
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QVector<TimelineViewGhostItem*> validate_track_ghosts = parent()->ghost_items_;
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for (int i=0;i<validate_track_ghosts.size();i++) {
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if (validate_track_ghosts.at(i)->Track().type() != drag_track_type_) {
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validate_track_ghosts.removeAt(i);
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i--;
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}
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}
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track_movement = ValidateTrackMovement(track_movement, validate_track_ghosts);
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}
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// Perform movement
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foreach (TimelineViewGhostItem* ghost, parent()->ghost_items_) {
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switch (ghost->mode()) {
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case Timeline::kNone:
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break;
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case Timeline::kTrimIn:
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ghost->SetInAdjustment(time_movement);
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break;
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case Timeline::kTrimOut:
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ghost->SetOutAdjustment(time_movement);
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break;
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case Timeline::kMove:
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{
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ghost->SetInAdjustment(time_movement);
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ghost->SetOutAdjustment(time_movement);
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// Track movement is only legal for moving, not for trimming
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// Also, we only move the clips on the same track type that the drag started from
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if (ghost->Track().type() == drag_track_type_) {
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ghost->SetTrackAdjustment(track_movement);
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const TrackReference& track = ghost->GetAdjustedTrack();
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ghost->SetYCoords(parent()->GetTrackY(track), parent()->GetTrackHeight(track));
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}
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break;
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}
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}
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}
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// Regenerate tooltip and force it to update (otherwise the tooltip won't move as written in the
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// documentation, and could get in the way of the cursor)
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QToolTip::hideText();
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QToolTip::showText(QCursor::pos(),
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Timecode::timestamp_to_timecode(Timecode::time_to_timestamp(time_movement, parent()->GetToolTipTimebase()),
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parent()->GetToolTipTimebase(),
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Core::instance()->GetTimecodeDisplay(),
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true),
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parent());
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}
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Timeline::MovementMode TimelineWidget::PointerTool::IsCursorInTrimHandle(TimelineViewBlockItem *block, qreal cursor_x)
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{
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double kTrimHandle = QFontMetricsWidth(parent()->fontMetrics(), "H");
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// Block is too narrow, no trimming allowed
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if (block->rect().width() <= kTrimHandle * 2) {
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return Timeline::kNone;
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}
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if (trimming_allowed_ && cursor_x <= block->x() + kTrimHandle) {
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return Timeline::kTrimIn;
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} else if (trimming_allowed_ && cursor_x >= block->x() + block->rect().right() - kTrimHandle) {
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return Timeline::kTrimOut;
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} else {
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return Timeline::kNone;
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}
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}
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void TimelineWidget::PointerTool::InitiateDrag(TimelineViewBlockItem* clicked_item,
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Timeline::MovementMode trim_mode)
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{
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// Get list of selected blocks
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QList<TimelineViewBlockItem*> clips = parent()->GetSelectedBlocks();
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if (trim_mode == Timeline::kMove) {
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// Create ghosts for moving
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foreach (TimelineViewBlockItem* clip_item, clips) {
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// Gaps are not allowed to move, so we ignore those here
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if (clip_item->block()->type() == Block::kGap) {
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continue;
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}
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AddGhostFromBlock(clip_item->block(), clip_item->Track(), trim_mode);
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}
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} else {
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// "Multi-trim" is trimming a clip on more than one track. Only the earliest (for in trimming)
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// or latest (for out trimming) clip on each track can be trimmed. Therefore, it's only enabled
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// if the clicked item is the earliest/latest on its track.
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bool multitrim_enabled = IsClipTrimmable(clicked_item, clips, trim_mode);
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// Create ghosts for trimming
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foreach (TimelineViewBlockItem* clip_item, clips) {
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if (clip_item != clicked_item
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&& (!multitrim_enabled || !IsClipTrimmable(clip_item, clips, trim_mode))) {
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// Either multitrim is disabled or this clip is NOT the earliest/latest in its track. We
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// won't include it.
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continue;
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}
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Block* block = clip_item->block();
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Timeline::MovementMode block_mode = trim_mode;
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// Some tools interpret "gap trimming" as equivalent to resizing the adjacent block. In that
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// scenario, we include the adjacent block instead.
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if (block->type() == Block::kGap && !gap_trimming_allowed_) {
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block = (trim_mode == Timeline::kTrimIn) ? block->previous() : block->next();
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block_mode = FlipTrimMode(trim_mode);
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// If there's no adjacent block, do nothing here
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if (!block) {
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continue;
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}
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}
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// Create ghost for this block
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AddGhostFromBlock(block, clip_item->Track(), block_mode);
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}
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}
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}
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TimelineViewGhostItem* TimelineWidget::PointerTool::AddGhostFromBlock(Block* block, const TrackReference& track, Timeline::MovementMode mode)
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{
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TimelineViewGhostItem* ghost = TimelineViewGhostItem::FromBlock(block,
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track,
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parent()->GetTrackY(track),
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parent()->GetTrackHeight(track));
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AddGhostInternal(ghost, mode);
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return ghost;
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}
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TimelineViewGhostItem* TimelineWidget::PointerTool::AddGhostFromNull(const rational &in, const rational &out, const TrackReference& track, Timeline::MovementMode mode)
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{
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TimelineViewGhostItem* ghost = new TimelineViewGhostItem();
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ghost->SetIn(in);
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ghost->SetOut(out);
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ghost->SetTrack(track);
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ghost->SetYCoords(parent()->GetTrackY(track), parent()->GetTrackHeight(track));
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AddGhostInternal(ghost, mode);
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return ghost;
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}
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void TimelineWidget::PointerTool::AddGhostInternal(TimelineViewGhostItem* ghost, Timeline::MovementMode mode)
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{
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ghost->SetMode(mode);
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// Prepare snap points (optimizes snapping for later)
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switch (mode) {
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case Timeline::kMove:
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snap_points_.append(ghost->In());
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snap_points_.append(ghost->Out());
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break;
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case Timeline::kTrimIn:
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snap_points_.append(ghost->In());
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break;
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case Timeline::kTrimOut:
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snap_points_.append(ghost->Out());
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break;
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default:
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break;
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}
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parent()->AddGhost(ghost);
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}
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bool TimelineWidget::PointerTool::IsClipTrimmable(TimelineViewBlockItem* clip,
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const QList<TimelineViewBlockItem*>& items,
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const Timeline::MovementMode& mode)
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{
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foreach (TimelineViewBlockItem* compare, items) {
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if (clip->Track() == compare->Track()
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&& clip != compare
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&& ((compare->block()->in() < clip->block()->in() && mode == Timeline::kTrimIn)
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|| (compare->block()->out() > clip->block()->out() && mode == Timeline::kTrimOut))) {
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return false;
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}
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}
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return true;
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}
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rational GetEarliestPointForClip(Block* block)
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{
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return qMax(rational(0), block->in() - block->media_in());
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}
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rational TimelineWidget::PointerTool::ValidateInTrimming(rational movement,
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const QVector<TimelineViewGhostItem *> ghosts,
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bool prevent_overwriting)
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{
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foreach (TimelineViewGhostItem* ghost, ghosts) {
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if (ghost->mode() != Timeline::kTrimIn) {
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continue;
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}
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Block* block = Node::ValueToPtr<Block>(ghost->data(TimelineViewGhostItem::kAttachedBlock));
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rational earliest_in = RATIONAL_MIN;
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rational latest_in = ghost->Out();
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if (block->type() == Block::kTransition) {
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// For transitions, validate with the attached block
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TransitionBlock* transition = static_cast<TransitionBlock*>(block);
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if (transition->connected_in_block() && transition->connected_out_block()) {
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// Here, we try to get the latest earliest point for both the in and out blocks, we do in here and out will
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// be calculated later
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earliest_in = GetEarliestPointForClip(transition->connected_in_block());
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// We set the block to the out block since that will be before the in block and will be the one we use to
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// prevent overwriting since we're trimming the in side of this transition
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block = transition->connected_out_block();
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latest_in = transition->in() + transition->out_offset();
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} else {
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// Use whatever block is attached
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block = transition->connected_in_block() ? transition->connected_in_block() : transition->connected_out_block();
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}
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}
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earliest_in = qMax(earliest_in, GetEarliestPointForClip(block));
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if (!ghost->CanHaveZeroLength()) {
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latest_in -= parent()->timebase();
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}
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if (prevent_overwriting) {
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// Look for a Block in the way
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Block* prev = block->previous();
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while (prev != nullptr) {
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if (prev->type() == Block::kClip) {
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earliest_in = qMax(earliest_in, prev->out());
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break;
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}
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prev = prev->previous();
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}
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}
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// Clamp adjusted value between the earliest and latest values
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rational adjusted = ghost->In() + movement;
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rational clamped = clamp(adjusted, earliest_in, latest_in);
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if (clamped != adjusted) {
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movement = clamped - ghost->In();
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}
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}
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return movement;
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}
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rational TimelineWidget::PointerTool::ValidateOutTrimming(rational movement,
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const QVector<TimelineViewGhostItem *> ghosts,
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bool prevent_overwriting)
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{
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foreach (TimelineViewGhostItem* ghost, ghosts) {
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if (ghost->mode() != Timeline::kTrimOut) {
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continue;
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}
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Block* block = Node::ValueToPtr<Block>(ghost->data(TimelineViewGhostItem::kAttachedBlock));
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// Determine earliest and latest out points
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rational earliest_out = ghost->In();
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if (!ghost->CanHaveZeroLength()) {
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earliest_out += parent()->timebase();
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}
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rational latest_out = RATIONAL_MAX;
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if (block->type() == Block::kTransition) {
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// For transitions, validate with the attached block
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TransitionBlock* transition = static_cast<TransitionBlock*>(block);
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|
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if (transition->connected_in_block() && transition->connected_out_block()) {
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// We set the block to the out block since that will be before the in block and will be the one we use to
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// prevent overwriting since we're trimming the in side of this transition
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|
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// FIXME: At some point we may add some better logic to `latest_out` akin to the logic in ValidateInTrimming
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// which is why this hasn't yet been collapsed into the ternary below.
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block = transition->connected_in_block();
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earliest_out = transition->out() - transition->in_offset();
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} else {
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block = transition->connected_in_block() ? transition->connected_in_block() : transition->connected_out_block();
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}
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}
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if (prevent_overwriting) {
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// Determine if there's a block in the way
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Block* next = block->next();
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while (next != nullptr) {
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if (next->type() == Block::kClip) {
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latest_out = qMin(latest_out, next->in());
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break;
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}
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next = next->next();
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}
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}
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// Clamp adjusted value between the earliest and latest values
|
|
rational adjusted = ghost->Out() + movement;
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rational clamped = clamp(adjusted, earliest_out, latest_out);
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|
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if (clamped != adjusted) {
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movement = clamped - ghost->Out();
|
|
}
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}
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return movement;
|
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}
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OLIVE_NAMESPACE_EXIT
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