main.cpp 范例文件

widgets/validators/main.cpp
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#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"