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50
51 #include <QtWidgets>
52
53 #include "mainwindow.h"
54
MainWindow()55 MainWindow::MainWindow()
56 {
57 QMenu *fileMenu = new QMenu(tr("&File"));
58
59 QAction *quitAction = fileMenu->addAction(tr("E&xit"));
60 quitAction->setShortcut(tr("Ctrl+Q"));
61
62 QMenu *itemsMenu = new QMenu(tr("&Items"));
63
64 insertAction = itemsMenu->addAction(tr("&Insert Item"));
65 removeAction = itemsMenu->addAction(tr("&Remove Item"));
66 QAction *ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));
67 QAction *descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));
68
69 menuBar()->addMenu(fileMenu);
70 menuBar()->addMenu(itemsMenu);
71
72 /* For convenient quoting:
73 //! [0]
74 QListWidget *listWidget = new QListWidget(this);
75 //! [0]
76 */
77 listWidget = new QListWidget(this);
78 listWidget->setSelectionMode(QAbstractItemView::SingleSelection);
79
80 connect(quitAction, &QAction::triggered, this, &QWidget::close);
81 connect(ascendingAction, &QAction::triggered, this, &MainWindow::sortAscending);
82 connect(descendingAction, &QAction::triggered, this, &MainWindow::sortDescending);
83 connect(insertAction, &QAction::triggered, this, &MainWindow::insertItem);
84 connect(removeAction, &QAction::triggered, this, &MainWindow::removeItem);
85 connect(listWidget, &QListWidget::currentItemChanged,
86 this, &MainWindow::updateMenus);
87
88 setupListItems();
89 updateMenus(listWidget->currentItem());
90
91 setCentralWidget(listWidget);
92 setWindowTitle(tr("List Widget"));
93 }
94
setupListItems()95 void MainWindow::setupListItems()
96 {
97 //! [1]
98 new QListWidgetItem(tr("Oak"), listWidget);
99 new QListWidgetItem(tr("Fir"), listWidget);
100 new QListWidgetItem(tr("Pine"), listWidget);
101 //! [1]
102 new QListWidgetItem(tr("Birch"), listWidget);
103 //! [2]
104 new QListWidgetItem(tr("Hazel"), listWidget);
105 //! [2]
106 new QListWidgetItem(tr("Redwood"), listWidget);
107 //! [3]
108 new QListWidgetItem(tr("Sycamore"), listWidget);
109 new QListWidgetItem(tr("Chestnut"), listWidget);
110 new QListWidgetItem(tr("Mahogany"), listWidget);
111 //! [3]
112 }
113
sortAscending()114 void MainWindow::sortAscending()
115 {
116 //! [4]
117 listWidget->sortItems(Qt::AscendingOrder);
118 //! [4]
119 }
120
sortDescending()121 void MainWindow::sortDescending()
122 {
123 //! [5]
124 listWidget->sortItems(Qt::DescendingOrder);
125 //! [5]
126 }
127
insertItem()128 void MainWindow::insertItem()
129 {
130 if (!listWidget->currentItem())
131 return;
132
133 QString itemText = QInputDialog::getText(this, tr("Insert Item"),
134 tr("Input text for the new item:"));
135
136 if (itemText.isNull())
137 return;
138
139 //! [6]
140 QListWidgetItem *newItem = new QListWidgetItem;
141 newItem->setText(itemText);
142 //! [6]
143 int row = listWidget->row(listWidget->currentItem());
144 //! [7]
145 listWidget->insertItem(row, newItem);
146 //! [7]
147
148 QString toolTipText = tr("Tooltip:") + itemText;
149 QString statusTipText = tr("Status tip:") + itemText;
150 QString whatsThisText = tr("What's This?:") + itemText;
151 //! [8]
152 newItem->setToolTip(toolTipText);
153 newItem->setStatusTip(toolTipText);
154 newItem->setWhatsThis(whatsThisText);
155 //! [8]
156 }
157
removeItem()158 void MainWindow::removeItem()
159 {
160 listWidget->takeItem(listWidget->row(listWidget->currentItem()));
161 }
162
updateMenus(QListWidgetItem * current)163 void MainWindow::updateMenus(QListWidgetItem *current)
164 {
165 insertAction->setEnabled(current != 0);
166 removeAction->setEnabled(current != 0);
167 }
168