1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtWidgets module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QCOLUMNVIEW_P_H
41#define QCOLUMNVIEW_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtWidgets/private/qtwidgetsglobal_p.h>
55#include "qcolumnview.h"
56
57#include <private/qabstractitemview_p.h>
58
59#include <QtCore/qabstractitemmodel.h>
60#if QT_CONFIG(animation)
61#include <QtCore/qpropertyanimation.h>
62#endif
63#include <QtWidgets/qabstractitemdelegate.h>
64#include <QtWidgets/qabstractitemview.h>
65#include <QtWidgets/qitemdelegate.h>
66#include <qlistview.h>
67#include <qevent.h>
68#include <qscrollbar.h>
69
70QT_REQUIRE_CONFIG(columnview);
71
72QT_BEGIN_NAMESPACE
73
74class QColumnViewPreviewColumn : public QAbstractItemView {
75
76public:
77 explicit QColumnViewPreviewColumn(QWidget *parent) : QAbstractItemView(parent), previewWidget(nullptr) {
78 }
79
80 void setPreviewWidget(QWidget *widget) {
81 previewWidget = widget;
82 setMinimumWidth(previewWidget->minimumWidth());
83 }
84
85 void resizeEvent(QResizeEvent * event) override{
86 if (!previewWidget)
87 return;
88 previewWidget->resize(
89 w: qMax(a: previewWidget->minimumWidth(), b: event->size().width()),
90 h: previewWidget->height());
91 QSize p = viewport()->size();
92 QSize v = previewWidget->size();
93 horizontalScrollBar()->setRange(min: 0, max: v.width() - p.width());
94 horizontalScrollBar()->setPageStep(p.width());
95 verticalScrollBar()->setRange(min: 0, max: v.height() - p.height());
96 verticalScrollBar()->setPageStep(p.height());
97
98 QAbstractScrollArea::resizeEvent(event);
99 }
100
101 void scrollContentsBy(int dx, int dy) override
102 {
103 if (!previewWidget)
104 return;
105 scrollDirtyRegion(dx, dy);
106 viewport()->scroll(dx, dy);
107
108 QAbstractItemView::scrollContentsBy(dx, dy);
109 }
110
111 QRect visualRect(const QModelIndex &) const override
112 {
113 return QRect();
114 }
115 void scrollTo(const QModelIndex &, ScrollHint) override
116 {
117 }
118 QModelIndex indexAt(const QPoint &) const override
119 {
120 return QModelIndex();
121 }
122 QModelIndex moveCursor(CursorAction, Qt::KeyboardModifiers) override
123 {
124 return QModelIndex();
125 }
126 int horizontalOffset () const override {
127 return 0;
128 }
129 int verticalOffset () const override {
130 return 0;
131 }
132 QRegion visualRegionForSelection(const QItemSelection &) const override
133 {
134 return QRegion();
135 }
136 bool isIndexHidden(const QModelIndex &) const override
137 {
138 return false;
139 }
140 void setSelection(const QRect &, QItemSelectionModel::SelectionFlags) override
141 {
142 }
143private:
144 QWidget *previewWidget;
145};
146
147class Q_AUTOTEST_EXPORT QColumnViewPrivate : public QAbstractItemViewPrivate
148{
149 Q_DECLARE_PUBLIC(QColumnView)
150
151public:
152 QColumnViewPrivate();
153 ~QColumnViewPrivate();
154 void initialize();
155
156 QAbstractItemView *createColumn(const QModelIndex &index, bool show);
157
158 void updateScrollbars();
159 void closeColumns(const QModelIndex &parent = QModelIndex(), bool build = false);
160 void doLayout();
161 void setPreviewWidget(QWidget *widget);
162 void checkColumnCreation(const QModelIndex &parent);
163
164
165 void _q_gripMoved(int offset);
166 void _q_changeCurrentColumn();
167 void _q_clicked(const QModelIndex &index);
168 void _q_columnsInserted(const QModelIndex &parent, int start, int end) override;
169
170 QList<QAbstractItemView*> columns;
171 QVector<int> columnSizes; // used during init and corner moving
172 bool showResizeGrips;
173 int offset;
174#if QT_CONFIG(animation)
175 QPropertyAnimation currentAnimation;
176#endif
177 QWidget *previewWidget;
178 QAbstractItemView *previewColumn;
179};
180
181/*!
182 * This is a delegate that will paint the triangle
183 */
184// ### Qt6: QStyledItemDelegate
185class QColumnViewDelegate : public QItemDelegate
186{
187
188public:
189 explicit QColumnViewDelegate(QObject *parent = nullptr) : QItemDelegate(parent) {}
190 ~QColumnViewDelegate() {}
191
192 void paint(QPainter *painter,
193 const QStyleOptionViewItem &option,
194 const QModelIndex &index) const override;
195};
196
197QT_END_NAMESPACE
198
199#endif //QCOLUMNVIEW_P_H
200

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