8.6 实例：sql缓存表.txt

来自「qt的源代码」· 文本 代码 · 共 78 行

 #ifndef TABLEEDITOR_H
 #define TABLEEDITOR_H
 #include <QDialog>
 class QDialogButtonBox;
 class QPushButton;
 class QSqlTableModel;
 class TableEditor : public QDialog
 {
     Q_OBJECT
 public:
     TableEditor(const QString &tableName, QWidget 
 *parent = 0);
 private slots:
     void submit();
 private:
     QPushButton *submitButton;
     QPushButton *revertButton;
     QPushButton *quitButton;
     QDialogButtonBox *buttonBox;
     QSqlTableModel *model;
};
 #endif
#include <QtGui>
 #include <QtSql>
 #include "tableeditor.h"
 TableEditor::TableEditor(const QString &tableName, QWidget *parent)
     : QDialog(parent)
 {
     model = new QSqlTableModel(this);
     model->setTable(tableName);
     model->setEditStrategy(QSqlTableModel::OnManualSubmit);
     model->select();
     model->setHeaderData(0, Qt::Horizontal, tr("ID"));
     model->setHeaderData(1, Qt::Horizontal, tr("First name"));
     model->setHeaderData(2, Qt::Horizontal, tr("Last name"));
     QTableView *view = new QTableView;
     view->setModel(model);
     submitButton = new QPushButton(tr("Submit"));
     submitButton->setDefault(true);
     revertButton = new QPushButton(tr("&Revert"));
     quitButton = new QPushButton(tr("Quit"));
     buttonBox = new QDialogButtonBox(Qt::Vertical);
     buttonBox->addButton(submitButton, QDialogButtonBox::ActionRole);
     buttonBox->addButton(revertButton, QDialogButtonBox::ActionRole);
     buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
     connect(submitButton, SIGNAL(clicked()), this, SLOT(submit()));
     connect(revertButton, SIGNAL(clicked()), model, SLOT(revertAll()));
     connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
     QHBoxLayout *mainLayout = new QHBoxLayout;
     mainLayout->addWidget(view);
     mainLayout->addWidget(buttonBox);
     setLayout(mainLayout);
     setWindowTitle(tr("Cached Table"));
 }
 void TableEditor::submit()
 {
     model->database().transaction();
     if (model->submitAll()) {
         model->database().commit();
     } else {
         model->database().rollback();
         QMessageBox::warning(this, tr("Cached Table"),
                              tr("The database reported an error: %1")
                              .arg(model->lastError().text()));
     }
 }
 #include <QApplication>
 #include "../connection.h"
 #include "tableeditor.h"
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     if (!createConnection())
         return 1;
     TableEditor editor("person");
     editor.show();
     return editor.exec();
 }