Qt：QLineEdit

#include "widget.h" #include <QLineEdit> #include <QVBoxLayout> #include <QString> #include <QAction> #include <QRegExp> #include <QIntValidator> Widget::Widget(QWidget *parent) : QWidget(parent) { QLineEdit *pNormalLineEdit = new QLineEdit(this); QLineEdit *pNoEchoLineEdit = new QLineEdit(this); QLineEdit *pPasswordLineEdit = new QLineEdit(this); QLineEdit *pPasswordEchoOnEditLineEdit = new QLineEdit(this); pNormalLineEdit->setPlaceholderText("Normal"); pNoEchoLineEdit->setPlaceholderText("NoEcho"); pPasswordLineEdit->setPlaceholderText("Password"); pPasswordEchoOnEditLineEdit->setPlaceholderText("PasswordEchoOnEditLineEdit"); // 设置显示效果 pNormalLineEdit->setEchoMode(QLineEdit::Normal); pNoEchoLineEdit->setEchoMode(QLineEdit::NoEcho); pPasswordLineEdit->setEchoMode(QLineEdit::Password); pPasswordEchoOnEditLineEdit->setEchoMode(QLineEdit::PasswordEchoOnEdit); //************************************* m_pLineEdit = new QLineEdit(this); m_pLabel = new QLabel(this); m_pLineEdit->setPlaceholderText(QString::fromLocal8Bit("请输入搜索内容")); m_pLabel->setText(QString::fromLocal8Bit("输入内容为：")); QAction *pLeadingAction = new QAction(this); pLeadingAction->setIcon(QIcon("D:/qt/LineEdit/2.png")); m_pLineEdit->addAction(pLeadingAction, QLineEdit::LeadingPosition); QAction *pTrailingAction = new QAction(this); pTrailingAction->setIcon(QIcon("D:/qt/LineEdit/1.ico")); m_pLineEdit->addAction(pTrailingAction, QLineEdit::TrailingPosition); // 连接信号和槽 connect(pTrailingAction, SIGNAL(triggered(bool)), this, SLOT(onSearch(bool))); //************************************** //************************************** QLineEdit *pIntLineEdit = new QLineEdit(this); QLineEdit *pDoubleLineEdit = new QLineEdit(this); QLineEdit *pValidatorLineEdit = new QLineEdit(this); pIntLineEdit->setPlaceholderText(QString::fromLocal8Bit("整形")); pDoubleLineEdit->setPlaceholderText(QString::fromLocal8Bit("浮点型")); pValidatorLineEdit->setPlaceholderText(QString::fromLocal8Bit("字母和数字")); // 整形 范围：[1, 99] QIntValidator *pIntValidator = new QIntValidator(this); pIntValidator->setRange(1, 99); // 浮点型 范围：[-360, 360] 精度：小数点后2位 QDoubleValidator *pDoubleValidator = new QDoubleValidator(this); pDoubleValidator->setRange(-360, 360); pDoubleValidator->setNotation(QDoubleValidator::StandardNotation); pDoubleValidator->setDecimals(2); // 字符和数字 QRegExp reg("[a-zA-Z0-9]+$"); QRegExpValidator *pValidator = new QRegExpValidator(this); pValidator->setRegExp(reg); pIntLineEdit->setValidator(pIntValidator); pDoubleLineEdit->setValidator(pDoubleValidator); pValidatorLineEdit->setValidator(pValidator); //************************************ //************************************ QLineEdit *pIPLineEdit = new QLineEdit(this); QLineEdit *pMACLineEdit = new QLineEdit(this); QLineEdit *pDateLineEdit = new QLineEdit(this); QLineEdit *pLicenseLineEdit = new QLineEdit(this); pIPLineEdit->setInputMask("000.000.000.000;_"); pMACLineEdit->setInputMask("HH:HH:HH:HH:HH:HH;_"); pDateLineEdit->setInputMask("0000-00-00"); pLicenseLineEdit->setInputMask(">AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;#"); //************************************ QVBoxLayout *gLayout = new QVBoxLayout(this); gLayout->addWidget(pNormalLineEdit,0,0); gLayout->addWidget(pNoEchoLineEdit,1,0); gLayout->addWidget(pPasswordLineEdit,2,0); gLayout->addWidget(pPasswordEchoOnEditLineEdit,3,0); gLayout->addWidget(m_pLineEdit,4,0); gLayout->addWidget(m_pLabel,5,0); gLayout->addWidget(pIntLineEdit,6,0); gLayout->addWidget(pDoubleLineEdit,7,0); gLayout->addWidget(pValidatorLineEdit,8,0); gLayout->addWidget(pIPLineEdit,9,0); gLayout->addWidget(pMACLineEdit,10,0); gLayout->addWidget(pDateLineEdit,11,0); gLayout->addWidget(pLicenseLineEdit,12,0); this->setLayout(gLayout); } Widget::~Widget() { } void Widget::onSearch(bool checked) { QString strText = m_pLineEdit->text(); m_pLabel->setText(QString::fromLocal8Bit("输入内容为：%1").arg(strText)); }