Qt 删除边距 [英] Qt remove margins

问题描述

我目前正在使用 QMainWindow 小部件，我想删除内部小部件周围的边距.我成功删除了窗口边框的边距，但没有删除窗口内的小部件.

I am currently using a QMainWindow widget and I would like to remove margins around the widget inside. I success to remove margins for window borders but not for the widgets inside my window.

这是我的代码，例如:

this->mainWidget = new QWidget(this);
this->mainLayout = new QHBoxLayout;
QLabel *foo = new QLabel("foo", this);
QLabel *bar = new QLabel("bar", this);

mainLayout->setContentsMargins(0, 0, 0, 0); // Remove margins for window borders

this->setWindowFlags(Qt::FramelessWindowHint);

foo->setStyleSheet("background-color: green");
bar->setStyleSheet("background-color: red");
foo->setContentsMargins(0, 0, 0, 0); // Has no effect
bar->setContentsMargins(0, 0, 0, 0); // Has no effect

this->mainLayout->addWidget(foo);
this->mainLayout->addWidget(bar);

this->mainWidget->setLayout(mainLayout);
this->setCentralWidget(mainWidget);

这是它呈现的内容:

我想去掉两个小部件之间的白色部分.

I would like to remove the white part between the two widgets.

你知道如何制作这种东西吗?

Have you an idea how to make that kind of things ?

谢谢.

推荐答案

你只需要设置spacing 你的盒子布局的属性为零:

You simply need to set the spacing attribute of your box layout to zero:

 this->mainLayout->setSpacing(0);

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