97 lines
3.0 KiB
C++
97 lines
3.0 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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OLIVE_NAMESPACE_ENTER
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TimelineWidget::ZoomTool::ZoomTool(TimelineWidget *parent) :
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Tool(parent)
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{
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}
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void TimelineWidget::ZoomTool::MousePress(TimelineViewMouseEvent *event)
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{
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Q_UNUSED(event)
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}
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void TimelineWidget::ZoomTool::MouseMove(TimelineViewMouseEvent *event)
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{
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Q_UNUSED(event)
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if (dragging_) {
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parent()->MoveRubberBandSelect(false, false);
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} else {
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parent()->StartRubberBandSelect(false, false);
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dragging_ = true;
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}
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}
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void TimelineWidget::ZoomTool::MouseRelease(TimelineViewMouseEvent *event)
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{
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if (dragging_) {
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// Zoom into the rubberband selection
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QRect screen_coords = parent()->rubberband_.geometry();
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parent()->EndRubberBandSelect();
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TimelineView* reference_view = parent()->views_.first()->view();
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QPointF scene_topleft = reference_view->mapToScene(reference_view->mapFrom(parent(), screen_coords.topLeft()));
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QPointF scene_bottomright = reference_view->mapToScene(reference_view->mapFrom(parent(), screen_coords.bottomRight()));
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double scene_left = scene_topleft.x();
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double scene_right = scene_bottomright.x();
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// Normalize scale to 1.0 scale
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double scene_width = (scene_right - scene_left) / parent()->GetScale();
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double new_scale = qMin(TimelineViewBase::kMaximumScale, static_cast<double>(reference_view->viewport()->width()) / scene_width);
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parent()->deferred_scroll_value_ = qMax(0, qRound(scene_left / parent()->GetScale() * new_scale));
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parent()->SetScale(new_scale);
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dragging_ = false;
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} else {
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// Simple zoom in/out at the cursor position
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double scale = parent()->GetScale();
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if (event->GetModifiers() & Qt::AltModifier) {
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// Zoom out if the user clicks while holding Alt
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scale *= 0.5;
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} else {
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// Otherwise zoom in
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scale *= 2.0;
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}
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parent()->SetScale(scale);
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// Adjust scroll location for new scale
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double frame_x = event->GetFrame().toDouble() * scale;
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parent()->deferred_scroll_value_ = qMax(0, qRound(frame_x - parent()->views_.first()->view()->viewport()->width()/2));
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}
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// (using a hacky singleShot so the scroll occurs after the scene and its scrollbars have updated)
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QTimer::singleShot(0, parent(), &TimelineWidget::DeferredScrollAction);
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}
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OLIVE_NAMESPACE_EXIT
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