1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QTREEVIEW_H
5#define QTREEVIEW_H
6
7#include <QtWidgets/qtwidgetsglobal.h>
8#include <QtWidgets/qabstractitemview.h>
9
10class tst_QTreeView;
11
12QT_REQUIRE_CONFIG(treeview);
13
14QT_BEGIN_NAMESPACE
15
16class QTreeViewPrivate;
17class QHeaderView;
18
19class Q_WIDGETS_EXPORT QTreeView : public QAbstractItemView
20{
21 Q_OBJECT
22 Q_PROPERTY(int autoExpandDelay READ autoExpandDelay WRITE setAutoExpandDelay)
23 Q_PROPERTY(int indentation READ indentation WRITE setIndentation RESET resetIndentation)
24 Q_PROPERTY(bool rootIsDecorated READ rootIsDecorated WRITE setRootIsDecorated)
25 Q_PROPERTY(bool uniformRowHeights READ uniformRowHeights WRITE setUniformRowHeights)
26 Q_PROPERTY(bool itemsExpandable READ itemsExpandable WRITE setItemsExpandable)
27 Q_PROPERTY(bool sortingEnabled READ isSortingEnabled WRITE setSortingEnabled)
28 Q_PROPERTY(bool animated READ isAnimated WRITE setAnimated)
29 Q_PROPERTY(bool allColumnsShowFocus READ allColumnsShowFocus WRITE setAllColumnsShowFocus)
30 Q_PROPERTY(bool wordWrap READ wordWrap WRITE setWordWrap)
31 Q_PROPERTY(bool headerHidden READ isHeaderHidden WRITE setHeaderHidden)
32 Q_PROPERTY(bool expandsOnDoubleClick READ expandsOnDoubleClick WRITE setExpandsOnDoubleClick)
33
34public:
35 explicit QTreeView(QWidget *parent = nullptr);
36 ~QTreeView();
37
38 void setModel(QAbstractItemModel *model) override;
39 void setRootIndex(const QModelIndex &index) override;
40 void setSelectionModel(QItemSelectionModel *selectionModel) override;
41
42 QHeaderView *header() const;
43 void setHeader(QHeaderView *header);
44
45 int autoExpandDelay() const;
46 void setAutoExpandDelay(int delay);
47
48 int indentation() const;
49 void setIndentation(int i);
50 void resetIndentation();
51
52 bool rootIsDecorated() const;
53 void setRootIsDecorated(bool show);
54
55 bool uniformRowHeights() const;
56 void setUniformRowHeights(bool uniform);
57
58 bool itemsExpandable() const;
59 void setItemsExpandable(bool enable);
60
61 bool expandsOnDoubleClick() const;
62 void setExpandsOnDoubleClick(bool enable);
63
64 int columnViewportPosition(int column) const;
65 int columnWidth(int column) const;
66 void setColumnWidth(int column, int width);
67 int columnAt(int x) const;
68
69 bool isColumnHidden(int column) const;
70 void setColumnHidden(int column, bool hide);
71
72 bool isHeaderHidden() const;
73 void setHeaderHidden(bool hide);
74
75 bool isRowHidden(int row, const QModelIndex &parent) const;
76 void setRowHidden(int row, const QModelIndex &parent, bool hide);
77
78 bool isFirstColumnSpanned(int row, const QModelIndex &parent) const;
79 void setFirstColumnSpanned(int row, const QModelIndex &parent, bool span);
80
81 bool isExpanded(const QModelIndex &index) const;
82 void setExpanded(const QModelIndex &index, bool expand);
83
84 void setSortingEnabled(bool enable);
85 bool isSortingEnabled() const;
86
87 void setAnimated(bool enable);
88 bool isAnimated() const;
89
90 void setAllColumnsShowFocus(bool enable);
91 bool allColumnsShowFocus() const;
92
93 void setWordWrap(bool on);
94 bool wordWrap() const;
95
96 void setTreePosition(int logicalIndex);
97 int treePosition() const;
98
99 void keyboardSearch(const QString &search) override;
100
101 QRect visualRect(const QModelIndex &index) const override;
102 void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override;
103 QModelIndex indexAt(const QPoint &p) const override;
104 QModelIndex indexAbove(const QModelIndex &index) const;
105 QModelIndex indexBelow(const QModelIndex &index) const;
106
107 void doItemsLayout() override;
108 void reset() override;
109
110 void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
111 const QList<int> &roles = QList<int>()) override;
112 void selectAll() override;
113
114Q_SIGNALS:
115 void expanded(const QModelIndex &index);
116 void collapsed(const QModelIndex &index);
117
118public Q_SLOTS:
119 void hideColumn(int column);
120 void showColumn(int column);
121 void expand(const QModelIndex &index);
122 void collapse(const QModelIndex &index);
123 void resizeColumnToContents(int column);
124 void sortByColumn(int column, Qt::SortOrder order);
125 void expandAll();
126 void expandRecursively(const QModelIndex &index, int depth = -1);
127 void collapseAll();
128 void expandToDepth(int depth);
129
130protected Q_SLOTS:
131 void columnResized(int column, int oldSize, int newSize);
132 void columnCountChanged(int oldCount, int newCount);
133 void columnMoved();
134 void reexpand();
135 void rowsRemoved(const QModelIndex &parent, int first, int last);
136 void verticalScrollbarValueChanged(int value) override;
137
138protected:
139 QTreeView(QTreeViewPrivate &dd, QWidget *parent = nullptr);
140 void scrollContentsBy(int dx, int dy) override;
141 void rowsInserted(const QModelIndex &parent, int start, int end) override;
142 void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) override;
143
144 QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers) override;
145 int horizontalOffset() const override;
146 int verticalOffset() const override;
147
148 void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command) override;
149 QRegion visualRegionForSelection(const QItemSelection &selection) const override;
150 QModelIndexList selectedIndexes() const override;
151
152 void changeEvent(QEvent *event) override;
153 void timerEvent(QTimerEvent *event) override;
154 void paintEvent(QPaintEvent *event) override;
155
156 void drawTree(QPainter *painter, const QRegion &region) const;
157 virtual void drawRow(QPainter *painter,
158 const QStyleOptionViewItem &options,
159 const QModelIndex &index) const;
160 virtual void drawBranches(QPainter *painter,
161 const QRect &rect,
162 const QModelIndex &index) const;
163
164 void mousePressEvent(QMouseEvent *event) override;
165 void mouseReleaseEvent(QMouseEvent *event) override;
166 void mouseDoubleClickEvent(QMouseEvent *event) override;
167 void mouseMoveEvent(QMouseEvent *event) override;
168 void keyPressEvent(QKeyEvent *event) override;
169#if QT_CONFIG(draganddrop)
170 void dragMoveEvent(QDragMoveEvent *event) override;
171#endif
172 bool viewportEvent(QEvent *event) override;
173
174 void updateGeometries() override;
175
176 QSize viewportSizeHint() const override;
177
178 int sizeHintForColumn(int column) const override;
179 int indexRowSizeHint(const QModelIndex &index) const;
180 int rowHeight(const QModelIndex &index) const;
181
182 void horizontalScrollbarAction(int action) override;
183
184 bool isIndexHidden(const QModelIndex &index) const override;
185 void selectionChanged(const QItemSelection &selected,
186 const QItemSelection &deselected) override;
187 void currentChanged(const QModelIndex &current, const QModelIndex &previous) override;
188
189private:
190 friend class ::tst_QTreeView;
191 friend class QAccessibleTable;
192 friend class QAccessibleTree;
193 friend class QAccessibleTableCell;
194 int visualIndex(const QModelIndex &index) const;
195
196 Q_DECLARE_PRIVATE(QTreeView)
197 Q_DISABLE_COPY(QTreeView)
198};
199
200QT_END_NAMESPACE
201
202#endif // QTREEVIEW_H
203

source code of qtbase/src/widgets/itemviews/qtreeview.h