我如何在两个QHBoxLayout之间保持纵横比?
例如,我想让一个QHBoxLayout占整个窗口宽度的三分之一,另一个QHBoxLayout占整个窗口宽度的三分之二:
我该如何实现这个目标?我尝试调整它们中的控件的大小提示,但没有成功。
void QSizePolicy::setHorizontalStretch(uchar stretchFactor)
示例:
QHBoxLayout* layout = new QHBoxLayout(form);
QWidget* left = new QWidget(form);
QSizePolicy spLeft(QSizePolicy::Preferred, QSizePolicy::Preferred);
spLeft.setHorizontalStretch(1);
left->setSizePolicy(spLeft);
layout->addWidget(left);
QWidget* right = new QWidget(form);
QSizePolicy spRight(QSizePolicy::Preferred, QSizePolicy::Preferred);
spRight.setHorizontalStretch(2);
right->setSizePolicy(spRight);
layout->addWidget(right);
QHBoxLayout *layout = new QHBoxLayout( this );
layout->setContentsMargins( 0, 0, 0, 0 );
layout->setSpacing( 0 );
QPushButton *left = new QPushButton( "133px", this );
left->setStyleSheet( "QPushButton{border: 1px solid red;}" );
QPushButton *right = new QPushButton( "267px", this );
right->setStyleSheet( "QPushButton{border: 1px solid blue;}" );
layout->addWidget( left, 33 );
layout->addWidget( right, 66 );
this->setLayout( layout );
this->setFixedWidth( 400 );
你也可以使用layoutStretch属性:
https://doc.qt.io/qt-5/layout.html#stretch-factors
在你的情况下,它将是<layout class="QHBoxLayout" name="horizontalLayout" stretch="1,2">
setStretchFactor
方法:layout->addWidget(left);
layout->addWidget(right);
layout->setStretchFactor(left, 1);
layout->setStretchFactor(right, 2);