1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*********
*
* In the name of the Father, and of the Son, and of the Holy Spirit.
*
* This file is part of BibleTime's source code, http://www.bibletime.info/.
*
* Copyright 1999-2016 by the BibleTime developers.
* The BibleTime source code is licensed under the GNU General Public License
* version 2.0.
*
**********/
#include "frontend/btmenuview.h"
#include <QActionGroup>
#include "util/btassert.h"
#include "util/btconnect.h"
BtMenuView::BtMenuView(QWidget *parent)
: QMenu(parent), m_model(nullptr), m_parentIndex(QModelIndex()), m_actions(nullptr)
{
BT_CONNECT(this, SIGNAL(aboutToShow()),
this, SLOT(slotAboutToShow()));
BT_CONNECT(this, SIGNAL(triggered(QAction*)),
this, SLOT(slotActionTriggered(QAction*)));
}
BtMenuView::~BtMenuView() {
delete m_actions;
}
void BtMenuView::setModel(QAbstractItemModel *model) {
m_model = model;
delete m_actions;
m_actions = nullptr;
m_indexMap.clear();
m_parentIndex = QModelIndex();
}
void BtMenuView::setParentIndex(const QModelIndex &parentIndex) {
if (parentIndex.isValid() && parentIndex.model() != m_model) return;
m_parentIndex = parentIndex;
}
void BtMenuView::preBuildMenu() {
// Intentionally empty. Reimplement in subclass if needed.
}
void BtMenuView::postBuildMenu() {
// Intentionally empty. Reimplement in subclass if needed.
}
QAction *BtMenuView::newAction(QMenu *parentMenu, const QModelIndex &itemIndex) {
QVariant displayData(m_model->data(itemIndex, Qt::DisplayRole));
QVariant iconData(m_model->data(itemIndex, Qt::DecorationRole));
QVariant toolTipData(m_model->data(itemIndex, Qt::ToolTipRole));
QVariant statusTipData(m_model->data(itemIndex, Qt::StatusTipRole));
QVariant whatsThisData(m_model->data(itemIndex, Qt::WhatsThisRole));
QAction *childAction = new QAction(parentMenu);
// Set text:
if (displayData.canConvert(QVariant::String)) {
childAction->setText(displayData.toString());
}
// Set icon:
if (iconData.canConvert(QVariant::Icon)) {
childAction->setIcon(iconData.value<QIcon>());
}
// Set tooltip:
if (toolTipData.canConvert(QVariant::String)) {
childAction->setToolTip(toolTipData.toString());
}
// Set status tip:
if (statusTipData.canConvert(QVariant::String)) {
childAction->setStatusTip(statusTipData.toString());
}
// Set whatsthis:
if (whatsThisData.canConvert(QVariant::String)) {
childAction->setWhatsThis(whatsThisData.toString());
}
// Set checkable:
if (m_model->flags(itemIndex).testFlag(Qt::ItemIsUserCheckable)) {
childAction->setCheckable(true);
}
// Set checked:
QVariant checkData(m_model->data(itemIndex, Qt::CheckStateRole));
bool ok;
Qt::CheckState const state =
static_cast<Qt::CheckState>(checkData.toInt(&ok));
if (ok)
childAction->setChecked(state == Qt::Checked);
return childAction;
}
QMenu *BtMenuView::newMenu(QMenu *parentMenu, const QModelIndex &itemIndex) {
QVariant displayData(m_model->data(itemIndex, Qt::DisplayRole));
QVariant iconData(m_model->data(itemIndex, Qt::DecorationRole));
QVariant toolTipData(m_model->data(itemIndex, Qt::ToolTipRole));
QVariant statusTipData(m_model->data(itemIndex, Qt::StatusTipRole));
QVariant whatsThisData(m_model->data(itemIndex, Qt::WhatsThisRole));
QMenu *childMenu = new QMenu(parentMenu);
// Set text:
if (displayData.canConvert(QVariant::String)) {
childMenu->setTitle(displayData.toString());
}
// Set icon:
if (iconData.canConvert(QVariant::Icon)) {
childMenu->setIcon(iconData.value<QIcon>());
}
// Set tooltip:
if (toolTipData.canConvert(QVariant::String)) {
childMenu->setToolTip(toolTipData.toString());
}
// Set status tip:
if (statusTipData.canConvert(QVariant::String)) {
childMenu->setStatusTip(statusTipData.toString());
}
// Set whatsthis:
if (whatsThisData.canConvert(QVariant::String)) {
childMenu->setWhatsThis(whatsThisData.toString());
}
return childMenu;
}
void BtMenuView::buildMenu(QMenu *parentMenu, const QModelIndex &parentIndex) {
BT_ASSERT(m_model);
BT_ASSERT(m_actions);
int children = m_model->rowCount(parentIndex);
for (int i = 0; i < children; i++) {
QModelIndex childIndex(m_model->index(i, 0, parentIndex));
if (m_model->rowCount(childIndex) > 0) {
QMenu *childMenu = newMenu(parentMenu, childIndex);
if (childMenu != nullptr) {
// Add the child menu and populate it:
parentMenu->addMenu(childMenu);
buildMenu(childMenu, childIndex);
}
} else {
QAction *childAction = newAction(parentMenu, childIndex);
if (childAction != nullptr) {
// Map index
m_indexMap.insert(childAction, childIndex);
// Add action to action group:
childAction->setActionGroup(m_actions);
// Add action to menu:
parentMenu->addAction(childAction);
}
}
}
}
void BtMenuView::slotAboutToShow() {
// The signal "aboutToHide" comes before the signal "triggered" and
// leads to executing a deleted action and a crash. It is much safer
// to remove the menus here.
removeMenus();
delete m_actions;
m_actions = nullptr;
m_indexMap.clear();
preBuildMenu();
if (m_model != nullptr) {
m_actions = new QActionGroup(this);
buildMenu(this, m_parentIndex);
}
postBuildMenu();
}
void BtMenuView::removeMenus() {
// QMenu::clear() is documented only to delete direct child actions:
clear();
// Delete submenus also:
Q_FOREACH (QObject * const child, children())
delete qobject_cast<QMenu *>(child);
}
void BtMenuView::slotActionTriggered(QAction *action) {
if (!m_indexMap.contains(action)) return;
QPersistentModelIndex itemIndex(m_indexMap.value(action));
if (itemIndex.isValid()) {
emit triggered(itemIndex);
}
}
|
