qt5base-lts/examples/widgets/validators/main.cpp

137 lines
4.6 KiB
C++
Raw Normal View History

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qdebug.h>
#include <QApplication>
#include <QLineEdit>
#include <QValidator>
#include "ui_validators.h"
class ValidatorWidget : public QWidget, public Ui::ValidatorsForm
{
Q_OBJECT
public:
ValidatorWidget(QWidget *parent = 0);
private slots:
void updateValidator();
void updateDoubleValidator();
void _setLocale(const QLocale &l) { setLocale(l); updateValidator(); updateDoubleValidator(); }
private:
QIntValidator *validator;
QDoubleValidator *doubleValidator;
};
ValidatorWidget::ValidatorWidget(QWidget *parent)
: QWidget(parent)
{
setupUi(this);
connect(localeSelector, SIGNAL(localeSelected(QLocale)), this, SLOT(_setLocale(QLocale)));
connect(minVal, SIGNAL(editingFinished()), this, SLOT(updateValidator()));
connect(maxVal, SIGNAL(editingFinished()), this, SLOT(updateValidator()));
connect(editor, SIGNAL(editingFinished()), ledWidget, SLOT(flash()));
connect(doubleMaxVal, SIGNAL(editingFinished()), this, SLOT(updateDoubleValidator()));
connect(doubleMinVal, SIGNAL(editingFinished()), this, SLOT(updateDoubleValidator()));
connect(doubleDecimals, SIGNAL(valueChanged(int)), this, SLOT(updateDoubleValidator()));
connect(doubleFormat, SIGNAL(activated(int)), this, SLOT(updateDoubleValidator()));
connect(doubleEditor, SIGNAL(editingFinished()), doubleLedWidget, SLOT(flash()));
validator = 0;
doubleValidator = 0;
updateValidator();
updateDoubleValidator();
};
void ValidatorWidget::updateValidator()
{
QIntValidator *v = new QIntValidator(minVal->value(), maxVal->value(), this);
v->setLocale(locale());
editor->setValidator(v);
delete validator;
validator = v;
QString s = editor->text();
int i = 0;
if (validator->validate(s, i) == QValidator::Invalid) {
editor->clear();
} else {
editor->setText(s);
}
}
void ValidatorWidget::updateDoubleValidator()
{
QDoubleValidator *v
= new QDoubleValidator(doubleMinVal->value(), doubleMaxVal->value(),
doubleDecimals->value(), this);
v->setNotation(static_cast<QDoubleValidator::Notation>(doubleFormat->currentIndex()));
v->setLocale(locale());
doubleEditor->setValidator(v);
delete doubleValidator;
doubleValidator = v;
QString s = doubleEditor->text();
int i = 0;
if (doubleValidator->validate(s, i) == QValidator::Invalid) {
doubleEditor->clear();
} else {
doubleEditor->setText(s);
}
}
int main(int argc, char **argv)
{
Q_INIT_RESOURCE(validators);
QApplication app(argc, argv);
ValidatorWidget w;
w.show();
return app.exec();
}
#include "main.moc"