1

我需要将 LineEdit 和 Button 组合成这样的元素,并且我希望 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,光标才会出现但不闪烁。 在此处输入图像描述

之后,我单击另一个位置以失去 lineEdit 的焦点,我希望光标不再存在,但光标仍然存在。

在此处输入图像描述

我知道问题出在我的样式表中,但我不知道在哪里。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 );
    }
 }
4

2 回答 2

2

当您在中返回 True 时,eventFilter()您将阻止要发送事件的小部件不接收它,在这种情况下,有FocusIn必要FocusOutQLineEdit. 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 );
}
于 2018-08-02T05:30:38.860 回答
0

FocusIn 和 FocusOut 对于 QLineEdit 事件就足够了。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。

于 2018-08-02T06:33:16.987 回答