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50
51#include "connectionwidget.h"
52
53#include <QtWidgets>
54#include <QtSql>
55
56ConnectionWidget::ConnectionWidget(QWidget *parent)
57 : QWidget(parent)
58{
59 QVBoxLayout *layout = new QVBoxLayout(this);
60 tree = new QTreeWidget(this);
61 tree->setObjectName(QLatin1String("tree"));
62 tree->setHeaderLabels(QStringList(tr(s: "database")));
63 tree->header()->setSectionResizeMode(QHeaderView::Stretch);
64 QAction *refreshAction = new QAction(tr(s: "Refresh"), tree);
65 metaDataAction = new QAction(tr(s: "Show Schema"), tree);
66 connect(sender: refreshAction, signal: &QAction::triggered, receiver: this, slot: &ConnectionWidget::refresh);
67 connect(sender: metaDataAction, signal: &QAction::triggered, receiver: this, slot: &ConnectionWidget::showMetaData);
68 tree->addAction(action: refreshAction);
69 tree->addAction(action: metaDataAction);
70 tree->setContextMenuPolicy(Qt::ActionsContextMenu);
71
72 layout->addWidget(tree);
73
74 QMetaObject::connectSlotsByName(o: this);
75}
76
77ConnectionWidget::~ConnectionWidget()
78{
79}
80
81static QString qDBCaption(const QSqlDatabase &db)
82{
83 QString nm = db.driverName();
84 nm.append(c: QLatin1Char(':'));
85 if (!db.userName().isEmpty())
86 nm.append(s: db.userName()).append(c: QLatin1Char('@'));
87 nm.append(s: db.databaseName());
88 return nm;
89}
90
91void ConnectionWidget::refresh()
92{
93 tree->clear();
94 QStringList connectionNames = QSqlDatabase::connectionNames();
95
96 bool gotActiveDb = false;
97 for (int i = 0; i < connectionNames.count(); ++i) {
98 QTreeWidgetItem *root = new QTreeWidgetItem(tree);
99 QSqlDatabase db = QSqlDatabase::database(connectionName: connectionNames.at(i), open: false);
100 root->setText(column: 0, atext: qDBCaption(db));
101 if (connectionNames.at(i) == activeDb) {
102 gotActiveDb = true;
103 setActive(root);
104 }
105 if (db.isOpen()) {
106 QStringList tables = db.tables();
107 for (int t = 0; t < tables.count(); ++t) {
108 QTreeWidgetItem *table = new QTreeWidgetItem(root);
109 table->setText(column: 0, atext: tables.at(i: t));
110 }
111 }
112 }
113 if (!gotActiveDb) {
114 activeDb = connectionNames.value(i: 0);
115 setActive(tree->topLevelItem(index: 0));
116 }
117
118 tree->doItemsLayout(); // HACK
119}
120
121QSqlDatabase ConnectionWidget::currentDatabase() const
122{
123 return QSqlDatabase::database(connectionName: activeDb);
124}
125
126static void qSetBold(QTreeWidgetItem *item, bool bold)
127{
128 QFont font = item->font(column: 0);
129 font.setBold(bold);
130 item->setFont(column: 0, afont: font);
131}
132
133void ConnectionWidget::setActive(QTreeWidgetItem *item)
134{
135 for (int i = 0; i < tree->topLevelItemCount(); ++i) {
136 if (tree->topLevelItem(index: i)->font(column: 0).bold())
137 qSetBold(item: tree->topLevelItem(index: i), bold: false);
138 }
139
140 if (!item)
141 return;
142
143 qSetBold(item, bold: true);
144 activeDb = QSqlDatabase::connectionNames().value(i: tree->indexOfTopLevelItem(item));
145}
146
147void ConnectionWidget::on_tree_itemActivated(QTreeWidgetItem *item, int /* column */)
148{
149 if (!item)
150 return;
151
152 if (!item->parent()) {
153 setActive(item);
154 } else {
155 setActive(item->parent());
156 emit tableActivated(table: item->text(column: 0));
157 }
158}
159
160void ConnectionWidget::showMetaData()
161{
162 QTreeWidgetItem *cItem = tree->currentItem();
163 if (!cItem || !cItem->parent())
164 return;
165 setActive(cItem->parent());
166 emit metaDataRequested(tableName: cItem->text(column: 0));
167}
168
169void ConnectionWidget::on_tree_currentItemChanged(QTreeWidgetItem *current, QTreeWidgetItem *)
170{
171 metaDataAction->setEnabled(current && current->parent());
172}
173
174

source code of qtbase/examples/sql/sqlbrowser/connectionwidget.cpp