blocks|key|313144|text|为此，Qt有一个名为Qt::MSWindowsFixedSizeDialogHint的windowFlag。根据您的实际需求，您需要将此标志与Qt::Widget、Qt::Window或Qt::Dialog结合使用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|313145|void+MyDialog::MyDialog()
{
++setWindowFlags(Qt::Dialog+%7C+Qt::MSWindowsFixedSizeDialogHint);

++...
}|code-block|syntax|javascript|313146|entityMap^0|A|W|1Z|A|2A|A|2L|A|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|L|$]]

Qt has a windowFlag called <code>Qt::MSWindowsFixedSizeDialogHint</code> for that. Depending on what you exactly want, you want to combine this flag with <code>Qt::Widget</code>, <code>Qt::Window</code> or <code>Qt::Dialog</code>.

<pre><code>void MyDialog::MyDialog()
{
 setWindowFlags(Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint);

 ...
}
</code></pre>

blocks|key|313253|text|如果您确切地知道所需的窗口大小，则使用一行代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313254|this->setFixedSize(QSize(750,+400));|code-block|syntax|javascript|313255|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

One-liner if you know exactly the required size of the window:

<pre><code>this-&gt;setFixedSize(QSize(750, 400));
</code></pre>

blocks|key|96095|text|尝试如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|96096|this->statusBar()->setSizeGripEnabled(false);|code-block|syntax|javascript|96097|如果这不起作用，您需要做的就是检测哪个小部件正在激活QSizeGrip。你可以通过在你的应用程序上安装一个事件过滤器并尝试捕获QSizeGrip的mouseMoveEvent来实现这一点。然后调试其父窗口小部件。|offset|length|96098|下面是您可以使用的eventFilter函数的示例：|96099|bool+MainWindow::eventFilter(QObject+*obj,+QEvent+*event)
{
++++if(event->type()+==+QEvent::MouseMove)
++++{
++++++++QSizeGrip+*sg+=+qobject_cast<QSizeGrip*>(obj);
++++++++if(sg)
++++++++++++qDebug()+<<+sg->parentWidget();
++++}
++++return+false;
}|96100|你可能也会看到它的展示事件，这取决于你。|96101|entityMap|0|LINK|mutability|MUTABLE|url|http://qt-project.org/doc/qt-4.8/qsizegrip.html^0|0|0|Q|9|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@$I|11|J|12|1|13]]|A|$]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Try something like this:

<pre><code>this-&gt;statusBar()-&gt;setSizeGripEnabled(false);
</code></pre>

If this doesn't work, all you need to do is detect what widget is activating <a href="http://qt-project.org/doc/qt-4.8/qsizegrip.html">QSizeGrip</a>. You can do this by installing an event filter on your app and try to catch the QSizeGrip's mouseMoveEvent. Then debug its parent widget.

Here's an example of the eventFilter function you could use:

<pre><code>bool MainWindow::eventFilter(QObject *obj, QEvent *event)
{
 if(event-&gt;type() == QEvent::MouseMove)
 {
 QSizeGrip *sg = qobject_cast&lt;QSizeGrip*&gt;(obj);
 if(sg)
 qDebug() &lt;&lt; sg-&gt;parentWidget();
 }
 return false;
}
</code></pre>

You could probably catch its show event as well, it's up to you.

blocks|key|96214|text|如果使用Qt设计器，请在垂直和水平方向上将窗口的"sizePolicy“属性设置为"Fixed”，并将最小尺寸和最大尺寸设置为相等的值。然后，右键单击窗口并选择“删除状态栏”，以摆脱右下角的“大小夹点”。或者，通过francis的建议仅删除尺寸夹点(而不是整个状态栏)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|96215|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If using Qt Designer, set your window's "sizePolicy" properties to "Fixed" in the vertical and horizontal directions and set minimum and maximum dimensions to equal values. Then, right-click on the window and select "Remove Status Bar" to get rid of the "size grip" in the bottom-right corner. Or, remove just the size grip via the suggestion from francis (rather than the entire status bar).

blocks|key|96382|text|我发现在布局上调用setSizeConstraint(QLayout::SetFixedSize)对我来说效果最好。具体地说，我从一个QMainWindow构造函数调用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|96383|this->layout()->setSizeConstraint(QLayout::SetFixedSize);|code-block|syntax|javascript|96384|这里有一个文档的链接：http://doc.qt.io/qt-4.8/qlayout.html#SizeConstraint-enum|offset|length|96385|(我使用的是Qt+4.8。)|96386|由于这也是解决OP问题的一种简单方法，我想我会分享它给其他人考虑。在Qt中似乎有很多方法可以实现这一点，但并不是所有的方法都适用于每种情况。我尝试了这里发布的其他几个选项，但它们有各种问题或限制，在我自己的情况下，我对这些问题或限制不满意。|96387|entityMap|0|LINK|mutability|MUTABLE|url|http://doc.qt.io/qt-4.8/qlayout.html#SizeConstraint-enum^0|0|0|B|1K|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

I found that calling setSizeConstraint(QLayout::SetFixedSize) on the layout worked the best for me. Specifically, from a QMainWindow constructor, I called:

<pre><code>this-&gt;layout()-&gt;setSizeConstraint(QLayout::SetFixedSize);
</code></pre>

Here's a link to the docs: <a href="http://doc.qt.io/qt-4.8/qlayout.html#SizeConstraint-enum" rel="noreferrer">http://doc.qt.io/qt-4.8/qlayout.html#SizeConstraint-enum</a>

(I'm using Qt 4.8.) 

Since this was also a simple way to solve the OP's question, I thought I would share it for others to consider. It appears that there are many ways to accomplish this in Qt, but not all may be ideal for every situation. I tried several of the other options posted here, but they had various issues or constraints that I wasn't happy with in my own situation.

blocks|key|96341|text|如果希望从UI窗体本身获取宽度和高度的值，而无需手动指定，则可以在项目类中添加以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|96342|this->setFixedSize(this->width(),+this->height());|code-block|syntax|javascript|96343|还可以使用以下命令为宽度和高度设置单独的参数(如果需要)：|96344|this->setFixedWidth(this->width());
this->setFixedHeight(this->height());|96345|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you wish to obtain the values of width and height from the UI form itself without manually specifying, then you can add the following command inside your project class:

<pre><code>this-&gt;setFixedSize(this-&gt;width(), this-&gt;height());
</code></pre>

You can also set separate parameters for width and height (if required) with:

<pre><code>this-&gt;setFixedWidth(this-&gt;width());
this-&gt;setFixedHeight(this-&gt;height());
</code></pre>

blocks|key|313073|text|这对我使用Qt+Creator+3.1.1很有帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313074|this->setFixedSize(this->maximumSize());|code-block|syntax|javascript|313075|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This helped me with Qt Creator 3.1.1:

<pre><code>this-&gt;setFixedSize(this-&gt;maximumSize());
</code></pre>

blocks|key|313199|text|您可以在Qt5中使用以下代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313200|this->setMinimumSize(sz);
this->setMaximumSize(sz);|code-block|syntax|javascript|313201|其中sz是QSize对象。|313202|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can in Qt5 use following code

<pre><code>this-&gt;setMinimumSize(sz);
this-&gt;setMaximumSize(sz);
</code></pre>

Where sz is QSize object.

blocks|key|313236|text|你也可以像这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313237|this->setFixedWidth(int);
this->setFixedHeight(int);|code-block|syntax|javascript|313238|箭头也不见了。|313239|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Also you can just do something like:

<pre><code>this-&gt;setFixedWidth(int);
this-&gt;setFixedHeight(int);
</code></pre>

The arrows are gone too.

blocks|key|313403|text|如果有人在寻找相同的东西，但是在Python中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313404|++++MainWindow.setWindowFlags(QtCore.Qt.MSWindowsFixedSizeDialogHint)|code-block|syntax|javascript|313405|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If someone looking for the same, but in Python:

<pre><code> MainWindow.setWindowFlags(QtCore.Qt.MSWindowsFixedSizeDialogHint)
</code></pre>

blocks|key|313304|text|要防止调整窗口大小，请添加以下行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313305|setFixedSize(width(),+height());|offset|length|style|CODE|313306|在您的QMainWindow构造函数中的行后面：ui->setupUi(this);。|313307|entityMap^0|0|0|W|0|O|I|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

To prevent resizing the window add this line:

<code>setFixedSize(width(), height());</code>

in your QMainWindow constructor after the line: <code>ui-&gt;setupUi(this);</code>.

blocks|key|313324|text|对我来说，在Windows10上真正有效的唯一解决方案是使用WinAPI：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313325|#ifdef+Q_OS_WIN
++++#include+<windows.h>

++++...

++++SetWindowLong((HWND)+window->winId(),+GWL_STYLE,+GetWindowLong((HWND)+window->winId(),+GWL_STYLE)&~WS_SIZEBOX);

#endif|code-block|syntax|javascript|313326|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The only solution that really worked for me on Windows 10 is using the WinAPI:

<pre><code>#ifdef Q_OS_WIN
 #include &lt;windows.h&gt;

 ...

 SetWindowLong((HWND) window-&gt;winId(), GWL_STYLE, GetWindowLong((HWND) window-&gt;winId(), GWL_STYLE)&amp;~WS_SIZEBOX);

#endif
</code></pre>

blocks|key|96470|text|大小只有在出现之前是未知的，并且可以根据系统设置(100%25，125%25，150%25)而有所不同，所以你可以尝试这样的设置(它还隐藏了resize-cursor)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|96471|void+QWidget::showEvent(QShowEvent+*event)
{
++++//+disable+vertical+resize
++++int+height+=+this->height();
++++if+(height+!=+minimumHeight()+%7C%7C+height+!=+maximumHeight())+{
++++++++setMinimumHeight(height);
++++++++setMaximumHeight(height);
++++}
}|code-block|syntax|javascript|96472|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The size is not known until the appearance and can vary by system settings too (100%, 125%, 150%), so you may try something like this (it also hides the resize-cursor):

<pre><code>void QWidget::showEvent(QShowEvent *event)
{
 // disable vertical resize
 int height = this-&gt;height();
 if (height != minimumHeight() || height != maximumHeight()) {
 setMinimumHeight(height);
 setMaximumHeight(height);
 }
}
</code></pre>

I used: 
<code>setFixedSize(size());</code>
to stop the window from resizing, but the resize arrows still appear when the mouse is over the border of the window.

Is there a better way to disable window resizing to avoid showing the arrows when crossing the border?

how can I fully disable resizing a window including the resize icon when the mouse hovers the border?

我使用：setFixedSize(size());来阻止窗口调整大小，但是当鼠标移到窗口边框上时，调整大小的箭头仍然会出现。有没有更好的方法来禁用窗口大小调整，以避免在穿越边界时显示箭头？

问当鼠标悬停在边框上时，如何完全禁止调整窗口大小？
EN

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问当鼠标悬停在边框上时，如何完全禁止调整窗口大小？EN

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问当鼠标悬停在边框上时，如何完全禁止调整窗口大小？
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