59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2022 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef EMPTYSPINBOX_H
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#define EMPTYSPINBOX_H
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#include <QSpinBox>
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#include <QFontMetrics>
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class EmptySpinBox : public QSpinBox
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{
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public:
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EmptySpinBox(QWidget *parent)
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: QSpinBox(parent)
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{
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setKeyboardTracking(true);
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setMaximum(3000);
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}
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QSize sizeHint() const override {
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return QSpinBox::sizeHint()+QSize(fontMetrics().height()/2, 0);
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}
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protected:
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QValidator::State validate(QString &input, int &pos) const override {
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return input.isEmpty() ? QValidator::Acceptable : QSpinBox::validate(input, pos);
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}
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int valueFromText(const QString &text) const override {
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return text.isEmpty() ? minimum() : QSpinBox::valueFromText(text);
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}
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QString textFromValue(int val) const override {
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return val==minimum() ? QString() : QSpinBox::textFromValue(val);
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}
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};
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#endif
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