如何从QWidget表单中删除此空间(边距) [英] How to remove this space(margin) from a QWidget form

问题描述

我有一个QWidget form，然后在表单上添加了QTextEdit，但顶部有一个空格(边距).

I have a QWidget form, then I have added QTextEdit on the form, but there is a space(margin) in the top.

我尝试使用以下内容:

QWidget *widget = new QWidget(this);
widget->layout()->setContentsMargins(0,0,0,0);

但是不幸的是，它没有实现我想要的功能.

But unfortunately, it did not do what I want.

如何像left，right和down那样删除该空格(边距)?

How to remove that space(margin) to be like the left, right and down side ?

完整代码

QWidget *widget = new QWidget(this);
QTextEdit *TextEdit = new QTextEdit(widget);
QMdiSubWindow *mdiWindows = ui->mdiArea->addSubWindow(widget);
mdiWindows->setGeometry(5, 5, 300, 250);
mdiWindows->setWindowTitle(finfo.baseName());
mdiWindows->setWindowState(Qt::WindowMaximized);
mdiWindows->layout()->addWidget(TextEdit);
mdiWindows->layout()->setContentsMargins(0,0,0,0);
TextEdit->setText(cache);
widget->setMaximumHeight(0);
mdiWindows->show();

推荐答案

尝试添加

widget->layout()->setSpacing(0);

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