69 lines
1.8 KiB
C++
69 lines
1.8 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/timelineview/timelineview.h"
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TimelineView::ZoomTool::ZoomTool(TimelineView* parent) :
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Tool(parent)
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{
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}
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void TimelineView::ZoomTool::MousePress(TimelineViewMouseEvent *event)
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{
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Q_UNUSED(event)
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}
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void TimelineView::ZoomTool::MouseMove(TimelineViewMouseEvent *event)
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{
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Q_UNUSED(event)
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}
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void TimelineView::ZoomTool::MouseRelease(TimelineViewMouseEvent *event)
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{
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double scale = parent()->scale_;
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// Get center of viewport
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QPoint viewport_center = parent()->viewport()->rect().center();
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QPointF scene_center = parent()->mapToScene(viewport_center);
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// Set X to time
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scene_center.setX(parent()->TimeToScreenCoord(event->GetCoordinates().GetFrame()));
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// Normalize zoom location for 1.0 scale
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double scaled_x = scene_center.x() / scale;
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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;
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}
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parent()->SetScale(scale);
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emit parent()->ScaleChanged(scale);
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// Adjust zoom location for new scale
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scaled_x *= scale;
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scene_center.setX(scaled_x);
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parent()->centerOn(scene_center);
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}
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