本文实例为大家分享了Qt实现密码显示按钮的具体代码，供大家参考，具体内容如下
PasswordLineEdit.h
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#ifndef PASSWORDLINEEDIT_H#define PASSWORDLINEEDIT_H#include <QAction>#include <QLineEdit>#include <QToolButton>class PasswordLineEdit : public QLineEdit {public: PasswordLineEdit(QWidget *parent = nullptr);private slots: void onPressed(); void onReleased();protected: void enterEvent(QEvent *event); void leaveEvent(QEvent *event); void focusInEvent(QFocusEvent *event); void focusOutEvent(QFocusEvent *event);private: QToolButton *button;};#endif // PASSWORDLINEEDIT_H |
PasswordLineEdit.cpp
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#include "passwordlineedit.h"PasswordLineEdit::PasswordLineEdit(QWidget *parent) : QLineEdit(parent){ setEchoMode(QLineEdit::Password); QAction *action = addAction(QIcon(":/eyeOff"), QLineEdit::TrailingPosition); button = qobject_cast<QToolButton *>(action->associatedWidgets().last()); button->hide(); button->setCursor(QCursor(Qt::PointingHandCursor)); connect(button, &QToolButton::pressed, this, &PasswordLineEdit::onPressed); connect(button, &QToolButton::released, this, &PasswordLineEdit::onReleased);}void PasswordLineEdit::onPressed(){ QToolButton *button = qobject_cast<QToolButton *>(sender()); button->setIcon(QIcon(":/eyeOn")); setEchoMode(QLineEdit::Normal);}void PasswordLineEdit::onReleased(){ QToolButton *button = qobject_cast<QToolButton *>(sender()); button->setIcon(QIcon(":/eyeOff")); setEchoMode(QLineEdit::Password);}void PasswordLineEdit::enterEvent(QEvent *event){ button->show(); QLineEdit::enterEvent(event);}void PasswordLineEdit::leaveEvent(QEvent *event){ button->hide(); QLineEdit::leaveEvent(event);}void PasswordLineEdit::focusInEvent(QFocusEvent *event){ button->show(); QLineEdit::focusInEvent(event);}void PasswordLineEdit::focusOutEvent(QFocusEvent *event){ button->hide(); QLineEdit::focusOutEvent(event);} |
main.cpp
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#include "passwordlineedit.h"#include <QApplication>#include <QFormLayout>int main(int argc, char *argv[]){ QApplication a(argc, argv); QWidget w; PasswordLineEdit *w1 = new PasswordLineEdit; QLineEdit *w2 = new QLineEdit; QFormLayout *lay = new QFormLayout(&w); lay->addRow("PasswordLineEdit: ", w1); lay->addRow("QLineEdit: ", w2); w.show(); return a.exec();} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/TM1695648164/article/details/119686737
