timelinewidget.h

/***

    Olive - Non-Linear Video Editor
    Copyright (C) 2019  Olive Team

    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 TIMELINEWIDGET_H
#define TIMELINEWIDGET_H

#include <QTimer>
#include <QWidget>
#include "timelinetools.h"

#define GHOST_THICKNESS 2 // thiccccc
#define CLIP_TEXT_PADDING 3

#define TRACK_MIN_HEIGHT 30
#define TRACK_HEIGHT_INCREMENT 10

struct Sequence;
class Clip;
struct FootageStream;
class Timeline;
class TimelineAction;
class QScrollBar;
class SetSelectionsCommand;
class QPainter;
class Media;

bool same_sign(int a, int b);
void draw_waveform(Clip* clip, const FootageStream *ms, long media_length, QPainter* p, const QRect& clip_rect, int waveform_start, int waveform_limit, double zoom);

class TimelineWidget : public QWidget {
    Q_OBJECT
public:
    explicit TimelineWidget(QWidget *parent = 0);
    QScrollBar* scrollBar;
    bool bottom_align;
protected:
    void paintEvent(QPaintEvent*);

    void resizeEvent(QResizeEvent *event);

    void mouseDoubleClickEvent(QMouseEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void leaveEvent(QEvent *event);

    void dragEnterEvent(QDragEnterEvent *event);
    void dragLeaveEvent(QDragLeaveEvent *event);
    void dropEvent(QDropEvent* event);
    void dragMoveEvent(QDragMoveEvent *event);

    void wheelEvent(QWheelEvent *event);
private:
    void init_ghosts();
    void update_ghosts(const QPoint& mouse_pos, bool lock_frame);
    bool is_track_visible(int track);
    int getTrackFromScreenPoint(int y);
    int getScreenPointFromTrack(int track);
    int getClipIndexFromCoords(long frame, int track);

    int track_resize_mouse_cache;
    int track_resize_old_value;
    bool track_resizing;
    int track_target;

    QVector<Clip*> pre_clips;
    QVector<Clip*> post_clips;

    Media* rc_reveal_media;

    Sequence* self_created_sequence;

    QTimer tooltip_timer;
    int tooltip_clip;

    int scroll;

    SetSelectionsCommand* selection_command;
signals:

public slots:
    void setScroll(int);

private slots:
    void reveal_media();
    void show_context_menu(const QPoint& pos);
    void toggle_autoscale();
    void tooltip_timer_timeout();
    void rename_clip();
    void show_stabilizer_diag();
    void open_sequence_properties();
};

#endif // TIMELINEWIDGET_H