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qt 6.5.1 original
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40
examples/sql/querymodel/CMakeLists.txt
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40
examples/sql/querymodel/CMakeLists.txt
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# Copyright (C) 2022 The Qt Company Ltd.
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# SPDX-License-Identifier: BSD-3-Clause
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cmake_minimum_required(VERSION 3.16)
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project(querymodel LANGUAGES CXX)
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if(NOT DEFINED INSTALL_EXAMPLESDIR)
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set(INSTALL_EXAMPLESDIR "examples")
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endif()
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set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/sql/querymodel")
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find_package(Qt6 REQUIRED COMPONENTS Core Gui Sql Widgets)
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qt_standard_project_setup()
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qt_add_executable(querymodel
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../connection.h
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customsqlmodel.cpp customsqlmodel.h
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editablesqlmodel.cpp editablesqlmodel.h
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main.cpp
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)
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set_target_properties(querymodel PROPERTIES
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WIN32_EXECUTABLE TRUE
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MACOSX_BUNDLE TRUE
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)
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target_link_libraries(querymodel PRIVATE
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Qt6::Core
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Qt6::Gui
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Qt6::Sql
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Qt6::Widgets
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)
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install(TARGETS querymodel
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RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
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BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
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LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
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)
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27
examples/sql/querymodel/customsqlmodel.cpp
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examples/sql/querymodel/customsqlmodel.cpp
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include <QtWidgets>
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#include "customsqlmodel.h"
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CustomSqlModel::CustomSqlModel(QObject *parent)
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: QSqlQueryModel(parent)
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{
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}
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//! [0]
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QVariant CustomSqlModel::data(const QModelIndex &index, int role) const
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{
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QVariant value = QSqlQueryModel::data(index, role);
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if (value.isValid() && role == Qt::DisplayRole) {
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if (index.column() == 0)
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return value.toString().prepend('#');
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else if (index.column() == 2)
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return value.toString().toUpper();
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}
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if (role == Qt::ForegroundRole && index.column() == 1)
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return QVariant::fromValue(QColor(Qt::blue));
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return value;
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}
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//! [0]
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21
examples/sql/querymodel/customsqlmodel.h
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examples/sql/querymodel/customsqlmodel.h
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#ifndef CUSTOMSQLMODEL_H
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#define CUSTOMSQLMODEL_H
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#include <QSqlQueryModel>
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//! [0]
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class CustomSqlModel : public QSqlQueryModel
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{
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Q_OBJECT
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public:
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CustomSqlModel(QObject *parent = nullptr);
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QVariant data(const QModelIndex &item, int role) const override;
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};
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//! [0]
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#endif
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72
examples/sql/querymodel/editablesqlmodel.cpp
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examples/sql/querymodel/editablesqlmodel.cpp
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include <QtSql>
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#include "editablesqlmodel.h"
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EditableSqlModel::EditableSqlModel(QObject *parent)
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: QSqlQueryModel(parent)
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{
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}
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//! [0]
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Qt::ItemFlags EditableSqlModel::flags(
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const QModelIndex &index) const
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{
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Qt::ItemFlags flags = QSqlQueryModel::flags(index);
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if (index.column() == 1 || index.column() == 2)
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flags |= Qt::ItemIsEditable;
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return flags;
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}
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//! [0]
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//! [1]
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bool EditableSqlModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
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{
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if (index.column() < 1 || index.column() > 2)
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return false;
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QModelIndex primaryKeyIndex = QSqlQueryModel::index(index.row(), 0);
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int id = data(primaryKeyIndex).toInt();
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clear();
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bool ok;
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if (index.column() == 1) {
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ok = setFirstName(id, value.toString());
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} else {
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ok = setLastName(id, value.toString());
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}
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refresh();
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return ok;
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}
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//! [1]
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void EditableSqlModel::refresh()
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{
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setQuery("select * from person");
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setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
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setHeaderData(1, Qt::Horizontal, QObject::tr("First name"));
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setHeaderData(2, Qt::Horizontal, QObject::tr("Last name"));
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}
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//! [2]
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bool EditableSqlModel::setFirstName(int personId, const QString &firstName)
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{
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QSqlQuery query;
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query.prepare("update person set firstname = ? where id = ?");
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query.addBindValue(firstName);
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query.addBindValue(personId);
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return query.exec();
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}
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//! [2]
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bool EditableSqlModel::setLastName(int personId, const QString &lastName)
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{
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QSqlQuery query;
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query.prepare("update person set lastname = ? where id = ?");
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query.addBindValue(lastName);
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query.addBindValue(personId);
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return query.exec();
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}
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25
examples/sql/querymodel/editablesqlmodel.h
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examples/sql/querymodel/editablesqlmodel.h
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#ifndef EDITABLESQLMODEL_H
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#define EDITABLESQLMODEL_H
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#include <QSqlQueryModel>
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class EditableSqlModel : public QSqlQueryModel
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{
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Q_OBJECT
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public:
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EditableSqlModel(QObject *parent = nullptr);
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Qt::ItemFlags flags(const QModelIndex &index) const override;
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bool setData(const QModelIndex &index, const QVariant &value, int role) override;
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private:
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bool setFirstName(int personId, const QString &firstName);
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bool setLastName(int personId, const QString &lastName);
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void refresh();
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};
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#endif
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54
examples/sql/querymodel/main.cpp
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54
examples/sql/querymodel/main.cpp
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "../connection.h"
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#include "customsqlmodel.h"
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#include "editablesqlmodel.h"
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#include <QApplication>
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#include <QTableView>
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#include <stdlib.h>
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void initializeModel(QSqlQueryModel *model)
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{
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model->setQuery("select * from person");
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model->setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
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model->setHeaderData(1, Qt::Horizontal, QObject::tr("First name"));
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model->setHeaderData(2, Qt::Horizontal, QObject::tr("Last name"));
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}
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QTableView* createView(QSqlQueryModel *model, const QString &title = "")
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{
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QTableView *view = new QTableView;
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view->setModel(model);
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static int offset = 0;
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view->setWindowTitle(title);
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view->move(100 + offset, 100 + offset);
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offset += 20;
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view->show();
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return view;
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}
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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if (!createConnection())
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return EXIT_FAILURE;
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QSqlQueryModel plainModel;
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EditableSqlModel editableModel;
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CustomSqlModel customModel;
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initializeModel(&plainModel);
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initializeModel(&editableModel);
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initializeModel(&customModel);
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createView(&plainModel, QObject::tr("Plain Query Model"));
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createView(&editableModel, QObject::tr("Editable Query Model"));
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createView(&customModel, QObject::tr("Custom Query Model"));
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return app.exec();
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}
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13
examples/sql/querymodel/querymodel.pro
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13
examples/sql/querymodel/querymodel.pro
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HEADERS = ../connection.h \
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customsqlmodel.h \
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editablesqlmodel.h
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SOURCES = customsqlmodel.cpp \
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editablesqlmodel.cpp \
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main.cpp
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QT += sql widgets
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requires(qtConfig(tableview))
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# install
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target.path = $$[QT_INSTALL_EXAMPLES]/sql/querymodel
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INSTALLS += target
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