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oak-editor/app/widget/resizablescrollbar/resizablescrollbar.h
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2026-01-16 21:22:05 +08:00

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/***
Olive - Non-Linear Video Editor
Copyright (C) 2022 Olive Team
Modifications Copyright (C) 2025 mikesolar
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#ifndef RESIZABLESCROLLBAR_H
#define RESIZABLESCROLLBAR_H
#include <QScrollBar>
#include "common/define.h"
namespace olive
{
class ResizableScrollBar : public QScrollBar {
Q_OBJECT
public:
ResizableScrollBar(QWidget *parent = nullptr);
ResizableScrollBar(Qt::Orientation orientation, QWidget *parent = nullptr);
signals:
void ResizeBegan(int old_bar_width, bool top_handle);
void ResizeMoved(int movement);
void ResizeEnded();
protected:
virtual void mousePressEvent(QMouseEvent *event) override;
virtual void mouseMoveEvent(QMouseEvent *event) override;
virtual void mouseReleaseEvent(QMouseEvent *event) override;
private:
QRect GetScrollBarRect();
static const int kHandleWidth;
enum MouseHandleState { kNotInHandle, kInTopHandle, kInBottomHandle };
void Init();
int GetActiveMousePos(QMouseEvent *event);
int GetActiveBarSize();
MouseHandleState mouse_handle_state_;
bool dragging_;
int drag_start_point_;
};
}
#endif // RESIZABLESCROLLBAR_H