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6 ** This file is part of the documentation of the Qt Toolkit.
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39 ****************************************************************************/
40
41 #include <QtGui>
42
43 #include "mainwindow.h"
44
MainWindow()45 MainWindow::MainWindow()
46 {
47 QMenu *fileMenu = new QMenu(tr("&File"));
48
49 QAction *quitAction = fileMenu->addAction(tr("E&xit"));
50 quitAction->setShortcut(tr("Ctrl+Q"));
51
52 QMenu *itemsMenu = new QMenu(tr("&Items"));
53
54 insertAction = itemsMenu->addAction(tr("&Insert Item"));
55 removeAction = itemsMenu->addAction(tr("&Remove Item"));
56 removeAction->setEnabled(false);
57 itemsMenu->addSeparator();
58 ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));
59 descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));
60 autoSortAction = itemsMenu->addAction(tr("&Automatically Sort Items"));
61 autoSortAction->setCheckable(true);
62 itemsMenu->addSeparator();
63 QAction *findItemsAction = itemsMenu->addAction(tr("&Find Items"));
64 findItemsAction->setShortcut(tr("Ctrl+F"));
65
66 menuBar()->addMenu(fileMenu);
67 menuBar()->addMenu(itemsMenu);
68
69 /* For convenient quoting:
70 //! [0]
71 QTreeWidget *treeWidget = new QTreeWidget(this);
72 //! [0]
73 */
74 treeWidget = new QTreeWidget(this);
75 //! [1]
76 treeWidget->setColumnCount(2);
77 //! [1] //! [2]
78 QStringList headers;
79 headers << tr("Subject") << tr("Default");
80 treeWidget->setHeaderLabels(headers);
81 //! [2]
82
83 connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
84 connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending()));
85 connect(autoSortAction, SIGNAL(triggered()), this, SLOT(updateSortItems()));
86 connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending()));
87 connect(findItemsAction, SIGNAL(triggered()), this, SLOT(findItems()));
88 connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));
89 connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));
90 connect(treeWidget,
91 SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),
92 this, SLOT(updateMenus(QTreeWidgetItem *)));
93
94 setupTreeItems();
95 updateMenus(treeWidget->currentItem());
96
97 setCentralWidget(treeWidget);
98 setWindowTitle(tr("Tree Widget"));
99 }
100
setupTreeItems()101 void MainWindow::setupTreeItems()
102 {
103 //! [3]
104 QTreeWidgetItem *cities = new QTreeWidgetItem(treeWidget);
105 cities->setText(0, tr("Cities"));
106 QTreeWidgetItem *osloItem = new QTreeWidgetItem(cities);
107 osloItem->setText(0, tr("Oslo"));
108 osloItem->setText(1, tr("Yes"));
109 //! [3]
110
111 (new QTreeWidgetItem(cities))->setText(0, tr("Stockholm"));
112 (new QTreeWidgetItem(cities))->setText(0, tr("Helsinki"));
113 (new QTreeWidgetItem(cities))->setText(0, tr("Copenhagen"));
114
115 //! [4] //! [5]
116 QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget, cities);
117 //! [4]
118 planets->setText(0, tr("Planets"));
119 //! [5]
120 (new QTreeWidgetItem(planets))->setText(0, tr("Mercury"));
121 (new QTreeWidgetItem(planets))->setText(0, tr("Venus"));
122
123 QTreeWidgetItem *earthItem = new QTreeWidgetItem(planets);
124 earthItem->setText(0, tr("Earth"));
125 earthItem->setText(1, tr("Yes"));
126
127 (new QTreeWidgetItem(planets))->setText(0, tr("Mars"));
128 (new QTreeWidgetItem(planets))->setText(0, tr("Jupiter"));
129 (new QTreeWidgetItem(planets))->setText(0, tr("Saturn"));
130 (new QTreeWidgetItem(planets))->setText(0, tr("Uranus"));
131 (new QTreeWidgetItem(planets))->setText(0, tr("Neptune"));
132 (new QTreeWidgetItem(planets))->setText(0, tr("Pluto"));
133 }
134
findItems()135 void MainWindow::findItems()
136 {
137 QString itemText = QInputDialog::getText(this, tr("Find Items"),
138 tr("Text to find (including wildcards):"));
139
140 if (itemText.isEmpty())
141 return;
142
143 //! [6]
144 QTreeWidgetItem *item;
145 //! [6]
146 foreach (item, treeWidget->selectedItems())
147 treeWidget->setItemSelected(item, false);
148
149 //! [7]
150 QList<QTreeWidgetItem *> found = treeWidget->findItems(
151 itemText, Qt::MatchWildcard);
152
153 foreach (item, found) {
154 treeWidget->setItemSelected(item, true);
155 // Show the item->text(0) for each item.
156 }
157 //! [7]
158 }
159
insertItem()160 void MainWindow::insertItem()
161 {
162 QTreeWidgetItem *currentItem = treeWidget->currentItem();
163
164 if (!currentItem)
165 return;
166
167 QString itemText = QInputDialog::getText(this, tr("Insert Item"),
168 tr("Input text for the new item:"));
169
170 if (itemText.isEmpty())
171 return;
172
173 //! [8]
174 QTreeWidgetItem *parent = currentItem->parent();
175 QTreeWidgetItem *newItem;
176 if (parent)
177 newItem = new QTreeWidgetItem(parent, treeWidget->currentItem());
178 else
179 //! [8] //! [9]
180 newItem = new QTreeWidgetItem(treeWidget, treeWidget->currentItem());
181 //! [9]
182
183 newItem->setText(0, itemText);
184 }
185
removeItem()186 void MainWindow::removeItem()
187 {
188 QTreeWidgetItem *currentItem = treeWidget->currentItem();
189
190 if (!currentItem)
191 return;
192
193 //! [10]
194 QTreeWidgetItem *parent = currentItem->parent();
195 int index;
196
197 if (parent) {
198 index = parent->indexOfChild(treeWidget->currentItem());
199 delete parent->takeChild(index);
200 } else {
201 index = treeWidget->indexOfTopLevelItem(treeWidget->currentItem());
202 delete treeWidget->takeTopLevelItem(index);
203 //! [10] //! [11]
204 }
205 //! [11]
206 }
207
sortAscending()208 void MainWindow::sortAscending()
209 {
210 treeWidget->sortItems(0, Qt::AscendingOrder);
211 }
212
sortDescending()213 void MainWindow::sortDescending()
214 {
215 treeWidget->sortItems(0, Qt::DescendingOrder);
216 }
217
updateMenus(QTreeWidgetItem * current)218 void MainWindow::updateMenus(QTreeWidgetItem *current)
219 {
220 insertAction->setEnabled(current != 0);
221 removeAction->setEnabled(current != 0);
222 }
223
updateSortItems()224 void MainWindow::updateSortItems()
225 {
226 ascendingAction->setEnabled(!autoSortAction->isChecked());
227 descendingAction->setEnabled(!autoSortAction->isChecked());
228
229 treeWidget->setSortingEnabled(autoSortAction->isChecked());
230 }
231