Question

我有一个我要添加动画的组合框。我创建了自定义组框类并实现了mouster进入和离开事件。在鼠标输入时，我检查高度并减少或增加动画，但似乎不起作用。

int height = groupBox->height();

if ( height >= 40 ) // if height is already increased set , decrease it. 
    {

       int groupBoxHeight = 15;

       QPropertyAnimation *animation = new QPropertyAnimation(groupBox, "geometry");
       animation->setDuration(2000);
       animation->setStartValue(QRect(this->x(), this->y(), this->width(), this->height()));
       animation->setEndValue(QRect(this->x(), this->y(), this->width(), groupBoxHeight));
       animation->setEasingCurve(QEasingCurve::OutBounce);
       animation->start(QAbstractAnimation::DeleteWhenStopped);
    }
    else
    {
        int groupboxHeight = 50;
        groupBox->setGeometry(groupBox->geometry().x(), groupBox->geometry().y(), groupBox->width(), groupboxHeight);

        QPropertyAnimation *animation = new QPropertyAnimation(groupBox, "geometry");
       animation->setDuration(2000);
       animation->setStartValue(QRect(this->x(), this->y(), this->width(), this->height()));
       animation->setEndValue(QRect(this->x(), this->y(), this->width(), groupboxHeight));
       animation->setEasingCurve(QEasingCurve::OutBounce);
       animation->start(QAbstractAnimation::DeleteWhenStopped);

    }

Answer 1

如果您将QSpacerItem添加到包含的布局，或者更好地将groupbox的大小设置为FixedSize，它可能会有效。当您动态添加和删除项目时，固定大小可能会导致问题，但它可以帮助

组合框的Qt动画

1 个答案: