Qt QLineEdit 限制输入类型以及大小Int 和double

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1.QLineEdit 限制整数

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m_LineEditIterate = new QLineEdit();

m_LineEditIterate->setFixedWidth(100);

m_LineEditIterate->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

m_LineEditIterate->setText("2");

m_LineEditIterate->setValidator(new QIntValidator(1, 9, m_LineEditIterate));

2. QLieEdit限制double类型,以及小数点,{0,2}这个是控制位数,

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QRegExp double_rx100("100|([0-9]{0,2}[\.][0-9]{1,3})");

QRegExp double_rx10000("10000|([0-9]{0,4}[\.][0-9]{1,3})");

QRegExp double_rx10("10|([0-9]{0,1}[\.][0-9]{1,3})");

m_LineEditDensity = new QLineEdit;

m_LineEditDensity->setValidator(new QRegExpValidator(double_rx100, m_LineEditDensity));

m_LineEditParA = new QLineEdit;

m_LineEditParA->setValidator(new QRegExpValidator(double_rx10000, m_LineEditParA));

m_LineEditParB = new QLineEdit;

m_LineEditParB->setValidator(new QRegExpValidator(double_rx10, m_LineEditParB));

3.QLineEdit只输入字母和数字 收藏

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QRegExp regx("[a-zA-Z0-9]+$");

QValidator *validator = new QRegExpValidator(regx, lined );

lined->setValidator( validator );