Hello20et1/connectionwidget.cpp at master · ledormeurduval/Hello20et1 · GitHub

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
/*
/*  CODE ADAPTE DE DEMOS QT EN LIGNE
/*
*/


#include "connectionwidget.h"

#include <QtWidgets>
#include <QtSql>
#include <iostream>

ConnectionWidget::ConnectionWidget(QWidget *parent,QString nom)
    : QWidget(parent),nomTable(nom)
{
    QVBoxLayout *layout = new QVBoxLayout(this);
    tree = new QTreeWidget(this);
    tree->setObjectName(QLatin1String("tree"));
    tree->setHeaderLabels(QStringList(tr("database")));
    tree->header()->setSectionResizeMode(QHeaderView::Stretch);
    QAction *refreshAction = new QAction(tr("Refresh"), tree);
    metaDataAction = new QAction(tr("Show Schema"), tree);
    connect(refreshAction, SIGNAL(triggered()), SLOT(refresh()));
    connect(metaDataAction, SIGNAL(triggered()), SLOT(showMetaData()));
    tree->addAction(refreshAction);
    tree->addAction(metaDataAction);
    tree->setContextMenuPolicy(Qt::ActionsContextMenu);

    layout->addWidget(tree);

    emit tableActivated(nomTable);

    QMetaObject::connectSlotsByName(this);
}

ConnectionWidget::~ConnectionWidget()
{
}

static QString qDBCaption(const QSqlDatabase &db)
{
    QString nm = db.driverName();
    nm.append(QLatin1Char(':'));
    if (!db.userName().isEmpty())
        nm.append(db.userName()).append(QLatin1Char('@'));
    nm.append(db.databaseName());
    return nm;
}

void ConnectionWidget::refresh()
{
    tree->clear();
    QStringList connectionNames = QSqlDatabase::connectionNames();

    bool gotActiveDb = false;
    for (int i = 0; i < connectionNames.count(); ++i) {
        QTreeWidgetItem *root = new QTreeWidgetItem(tree);
        QSqlDatabase db = QSqlDatabase::database(connectionNames.at(i), false);
        root->setText(0, qDBCaption(db));
        if (connectionNames.at(i) == activeDb) {
            gotActiveDb = true;
            setActive(root);
        }
        if (db.isOpen()) {
            QStringList tables = db.tables();
            for (int t = 0; t < tables.count(); ++t) {
                QTreeWidgetItem *table = new QTreeWidgetItem(root);
                table->setText(0, tables.at(t));
            }
        }
    }
    if (!gotActiveDb) {
        activeDb = connectionNames.value(0);
        setActive(tree->topLevelItem(0));
    }

    emit tableActivated(nomTable);

    tree->doItemsLayout();
}

QSqlDatabase ConnectionWidget::currentDatabase() const
{
    QSqlDatabase db = QSqlDatabase::database(activeDb) ;
    return db;
}

static void qSetBold(QTreeWidgetItem *item, bool bold)
{
    QFont font = item->font(0);
    font.setBold(bold);
    item->setFont(0, font);
}

void ConnectionWidget::setActive(QTreeWidgetItem *item)
{
    for (int i = 0; i < tree->topLevelItemCount(); ++i) {
        if (tree->topLevelItem(i)->font(0).bold())
            qSetBold(tree->topLevelItem(i), false);
    }

    if (!item)
        return;

    qSetBold(item, true);
    activeDb = QSqlDatabase::connectionNames().value(tree->indexOfTopLevelItem(item));
}

void ConnectionWidget::on_tree_itemActivated(QTreeWidgetItem *item, int /* column */)
{

    if (!item)
        return;

    if (!item->parent()) {
        setActive(item);
    } else {
        setActive(item->parent());
        emit tableActivated(item->text(0));
    }
}

void ConnectionWidget::showMetaData()
{
    QTreeWidgetItem *cItem = tree->currentItem();
    if (!cItem || !cItem->parent())
        return;
    setActive(cItem->parent());
    emit metaDataRequested(cItem->text(0));
}

void ConnectionWidget::on_tree_currentItemChanged(QTreeWidgetItem *current, QTreeWidgetItem *)
{
    metaDataAction->setEnabled(current && current->parent());
}