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# button.cpp Example File
widgets/calculator/button.cpp

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        **
        ** This file is part of the example classes of the Qt Toolkit.
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        ** accordance with the Qt Preview License Agreement provided with the
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        #include <QtGui>

        #include "button.h"

        Button::Button(const QString &text, const QColor &color, QWidget *parent)
            : QToolButton(parent)
        {
            setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
            setText(text);

            QPalette newPalette = palette();
            newPalette.setColor(QPalette::Button, color);
            setPalette(newPalette);
        }

        QSize Button::sizeHint() const
        {
            QSize size = QToolButton::sizeHint();
            size.rheight() += 20;
            size.rwidth() = qMax(size.width(), size.height());
            return size;
        }