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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtGui>
#include "mainwindow.h"
#include "model.h"
/*!
The main window constructor creates and populates a model with values
from a string list then displays the contents of the model using a
QListView widget.
*/
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
QMenu *fileMenu = new QMenu(tr("&File"));
QAction *quitAction = fileMenu->addAction(tr("E&xit"));
quitAction->setShortcut(tr("Ctrl+Q"));
QMenu *itemsMenu = new QMenu(tr("&Items"));
insertAction = itemsMenu->addAction(tr("&Insert Item"));
removeAction = itemsMenu->addAction(tr("&Remove Item"));
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(itemsMenu);
QStringList numbers;
numbers << tr("One") << tr("Two") << tr("Three") << tr("Four") << tr("Five")
<< tr("Six") << tr("Seven") << tr("Eight") << tr("Nine") << tr("Ten");
model = new StringListModel(numbers);
QListView *view = new QListView(this);
view->setModel(model);
selectionModel = view->selectionModel();
connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));
connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));
connect(selectionModel,
SIGNAL(currentChanged(QModelIndex,QModelIndex)),
this, SLOT(updateMenus(QModelIndex)));
setCentralWidget(view);
setWindowTitle("View onto a string list model");
}
void MainWindow::insertItem()
{
if (!selectionModel->currentIndex().isValid())
return;
QString itemText = QInputDialog::getText(this, tr("Insert Item"),
tr("Input text for the new item:"));
if (itemText.isNull())
return;
int row = selectionModel->currentIndex().row();
if (model->insertRows(row, 1))
model->setData(model->index(row, 0), itemText, Qt::EditRole);
}
void MainWindow::removeItem()
{
if (!selectionModel->currentIndex().isValid())
return;
int row = selectionModel->currentIndex().row();
model->removeRows(row, 1);
}
void MainWindow::updateMenus(const QModelIndex ¤tIndex)
{
insertAction->setEnabled(currentIndex.isValid());
removeAction->setEnabled(currentIndex.isValid());
}
|
