1 /*
2  * Strawberry Music Player
3  * This file was part of Clementine.
4  * Copyright 2010, David Sansome <me@davidsansome.com>
5  * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
6  *
7  * Strawberry is free software: you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation, either version 3 of the License, or
10  * (at your option) any later version.
11  *
12  * Strawberry is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
19  *
20  */
21 
22 #ifndef AUTOEXPANDINGTREEVIEW_H
23 #define AUTOEXPANDINGTREEVIEW_H
24 
25 #include "config.h"
26 
27 #include <QtGlobal>
28 #include <QObject>
29 #include <QString>
30 #include <QTreeView>
31 
32 class QMimeData;
33 class QWidget;
34 class QModelIndex;
35 class QKeyEvent;
36 class QMouseEvent;
37 
38 class AutoExpandingTreeView : public QTreeView {
39   Q_OBJECT
40 
41  public:
42   explicit AutoExpandingTreeView(QWidget *parent = nullptr);
43 
44   static const int kRowsToShow;
45 
SetAutoOpen(bool v)46   void SetAutoOpen(bool v) { auto_open_ = v; }
SetExpandOnReset(bool v)47   void SetExpandOnReset(bool v) { expand_on_reset_ = v; }
SetAddOnDoubleClick(bool v)48   void SetAddOnDoubleClick(bool v) { add_on_double_click_ = v; }
49 
50  public slots:
51   void RecursivelyExpandSlot(const QModelIndex &idx);
52   void UpAndFocus();
53   void DownAndFocus();
54 
55  signals:
56   void AddToPlaylistSignal(QMimeData *data);
57   void FocusOnFilterSignal(QKeyEvent *event);
58 
59  protected:
60   // QAbstractItemView
61   void reset() override;
62 
63   // QWidget
64   void mousePressEvent(QMouseEvent *event) override;
65   void mouseDoubleClickEvent(QMouseEvent *event) override;
66   void keyPressEvent(QKeyEvent *event) override;
67 
CanRecursivelyExpand(const QModelIndex & idx)68   virtual bool CanRecursivelyExpand(const QModelIndex &idx) const { Q_UNUSED(idx); return true; }
69 
70  private slots:
71   void ItemExpanded(const QModelIndex &idx);
72   void ItemClicked(const QModelIndex &idx);
73   void ItemDoubleClicked(const QModelIndex &idx);
74 
75  private:
76   bool RecursivelyExpand(const QModelIndex &idx, int *count);
77 
78  private:
79   bool auto_open_;
80   bool expand_on_reset_;
81   bool add_on_double_click_;
82   bool ignore_next_click_;
83 };
84 
85 #endif  // AUTOEXPANDINGTREEVIEW_H
86