这篇文章主要为大家详细介绍了Qt实现密码显示按钮，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
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
#ifndef PASSWORDLINEEDIT_H #define PASSWORDLINEEDIT_H #include#include #include 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
#include "passwordlineedit.h" PasswordLineEdit::PasswordLineEdit(QWidget *parent) : QLineEdit(parent) { setEchoMode(QLineEdit::Password); QAction *action = addAction(QIcon(":/eyeOff"), QLineEdit::TrailingPosition); button = qobject_cast(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(sender()); button->setIcon(QIcon(":/eyeOn")); setEchoMode(QLineEdit::Normal); } void PasswordLineEdit::onReleased() { QToolButton *button = qobject_cast(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
#include "passwordlineedit.h" #include#include 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(); }
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