光标仍然出现在 LineEdit 中，尽管它不再聚焦

Question

我需要将一个 LineEdit 和一个 Button 组合成这样一个元素，我希望 lineEdit 像往常一样工作。但是当我点击 lineEdit 时，光标没有出现，只有当我点击 3 次时，光标出现但不闪烁。

然后我点击另一个地方失去了lineEdit的焦点，我希望光标不再在那里但是光标仍然在那里。

我知道问题出在我的样式表中，但我找不到出处。你们能帮帮我吗？

这是我的代码：

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->lineEdit1->setPlaceholderText("another LineEdit to lose focus for the LineEdit below");
    QHBoxLayout *lineEditWithButtonForm = new QHBoxLayout( this );
    lineEditWithButtonForm->setSpacing(0);
    lineEditWithButtonForm->setContentsMargins(0,0,0,0);
    ui->m_lineEdit->setContentsMargins(10,0,10,0);
    ui->m_lineEdit->setFixedHeight( 25 );
    ui->m_lineEdit->setStyleSheet("QLineEdit{ padding-left: 10px; padding-right: 10px; border-width: 1px 0px 1px 1px; border-style: solid; border-color: rgb(204,204,204); }");
    lineEditWithButtonForm->addWidget(ui->m_lineEdit);
    ui->m_button->setFixedHeight( 25 );
    ui->m_button->setCursor( QCursor( Qt::PointingHandCursor ) );
    ui->m_button->setFocusPolicy(Qt::ClickFocus);
    ui->m_button->setStyleSheet( "QAbstractButton{ border-width: 1px 1px 1px 0px; border-style: solid; border-color: rgb(204,204,204); }");
    lineEditWithButtonForm->addWidget(ui->m_lineEdit);

    ui->m_lineEdit->installEventFilter( this );
}

bool MainWindow::eventFilter( QObject *obj, QEvent *event )
{
    if ( obj == ui->m_lineEdit )
    {
        if ( event->type() == QEvent::FocusIn )
        {
            ui->m_lineEdit->setStyleSheet( "QLineEdit{padding-left: 10px; padding-right: 10px; border-width: 1px 0px 1px 1px; border-style: solid; border-color:rgb(249,125,25)}" );
            ui->m_button->setStyleSheet( "QAbstractButton{ border-width: 1px 1px 1px 0px; border-style: solid; border-color: rgb(249,125,25)}" );
            return true;
        }
        else if ( event->type() == QEvent::FocusOut)
        {
            ui->m_lineEdit->setStyleSheet( "QLineEdit{ padding-left: 10px; padding-right: 10px; border-width: 1px 0px 1px 1px; border-style: solid; border-color: rgb(204,204,204)}" );
            ui->m_button->setStyleSheet( "QAbstractButton{ border-width: 1px 1px 1px 0px; border-style: solid; border-color: rgb(204,204,204) } ");
            return true;
        }
        else
        {
            return false;
        }
    }
    else
    {
        return MainWindow::eventFilter( obj, event );
    }
 }

Answer 1

当您 return 在 eventFilter() 中为 True 时，您将阻止要发送事件的小部件不接收它，在这种情况下，FocusIn 和 FocusOut 事件由 QLineEdit 接收。考虑到这一点，可以提出以下解决方案：

bool MainWindow::eventFilter( QObject *obj, QEvent *event )
{
    if ( obj == ui->m_lineEdit )
    {
        if ( event->type() == QEvent::FocusIn )
        {
            ui->m_lineEdit->setStyleSheet( "QLineEdit{padding-left: 10px; padding-right: 10px; border-width: 1px 0px 1px 1px; border-style: solid; border-color:rgb(249,125,25)}" );
            ui->m_button->setStyleSheet( "QAbstractButton{ border-width: 1px 1px 1px 0px; border-style: solid; border-color: rgb(249,125,25)}" );
        }
        else if ( event->type() == QEvent::FocusOut)
        {
            ui->m_lineEdit->setStyleSheet( "QLineEdit{ padding-left: 10px; padding-right: 10px; border-width: 1px 0px 1px 1px; border-style: solid; border-color: rgb(204,204,204)}" );
            ui->m_button->setStyleSheet( "QAbstractButton{ border-width: 1px 1px 1px 0px; border-style: solid; border-color: rgb(204,204,204) } ");
        }
    }
    return QMainWindow::eventFilter( obj, event );
}

Answer 2

FocusIn 和 FocusOut 足以用于 QLineEdit 事件。剩下的所有事件都需要由 QMainWindow 处理。通过删除 else 部分中的 return false 语句可以解决问题。

光标仍然出现在 LineEdit 中，尽管它不再聚焦

Cursor still appears in LineEdit although it is not focused any more

c++

qt

qlineedit

qt5

qstylesheet