<![CDATA[Resize the "setGeometry" from cpp]]>Hai everyone. I want to resize my widget by its geometry. This is the code

void MainGUI::resizeEvent(QResizeEvent *e)
{
	heightsize = e->size().height();
	float spacing = heightsize/700.0;

	QWidget * channel = new QWidget(this);
	channelFrame * cF = new channelFrame(channel);
	cF->setGeometry(10, 40 + ( 75 * spacing), 1115, 35);
	cF->show();
}

But it also add the widget, not resizing it. how can I only resize the spacing? Sorry I'm a newbie here

]]>https://forum.qt.io/topic/131328/resize-the-setgeometry-from-cppRSS for NodeSun, 12 Apr 2026 12:44:07 GMTFri, 22 Oct 2021 06:38:17 GMT60<![CDATA[Reply to Resize the "setGeometry" from cpp on Tue, 26 Oct 2021 13:14:14 GMT]]>@ChrisW67 I'm using another method, I'm not reccommend this method because its for newbie like me. hehe. So I build one per one of channel frame like this...
81e093f8-de90-48b3-bce0-2f4238d2d423-image.png

I think it solved but I have to make more codes for this methods

]]>https://forum.qt.io/post/686842https://forum.qt.io/post/686842Tue, 26 Oct 2021 13:14:14 GMT<![CDATA[Reply to Resize the "setGeometry" from cpp on Fri, 22 Oct 2021 22:39:58 GMT]]>@mimamrafi Can you confirm that you want the individual sub-widgets (i.e. the Off, +, - buttons, sliders etc.) to stay exactly the same size and only the space between them to grow if the total available space grows?

Can you post the UI file that you seem to have for your channelFrame?

]]>https://forum.qt.io/post/686319https://forum.qt.io/post/686319Fri, 22 Oct 2021 22:39:58 GMT<![CDATA[Reply to Resize the "setGeometry" from cpp on Fri, 22 Oct 2021 09:08:08 GMT]]>@mimamrafi
It's difficult to answer your questions. You need a basic understanding of Qt and widgets, which seems to be lacking.

How to update my widget? How to avoid "new" QWidget?

Do whatever on your existing widget, don't create a new one. Can't answer any clearer than that.

I know there's layout feature, but in my case I have to make it dynamic from cpp

QLayouts can be created from C++ code, not just from e.g. Qt Designer/.ui file. You should be doing all of your desired layout via suitable QLayouts, not setGeomtetry() or any coordinate positioning of widgets, as @ChrisW67 indicated. Your case looks like a QGridLayout.

]]>https://forum.qt.io/post/686203https://forum.qt.io/post/686203Fri, 22 Oct 2021 09:08:08 GMT<![CDATA[Reply to Resize the "setGeometry" from cpp on Fri, 22 Oct 2021 08:30:27 GMT]]>@ChrisW67 I know there's layout feature, but in my case I have to make it dynamic from cpp

]]>https://forum.qt.io/post/686198https://forum.qt.io/post/686198Fri, 22 Oct 2021 08:30:27 GMT<![CDATA[Reply to Resize the "setGeometry" from cpp on Fri, 22 Oct 2021 08:20:03 GMT]]>@JonB the channelFrame is a class that contain many widget.
ebbfc997-23c8-423c-96f7-27d335997bcc-image.png
this is the channelframe.ui and I created it repeatedly. Like this
31eb2e3b-f3ee-4a72-96c1-5ab65a377c1d-image.png

And I want the channelSpacing more wider when size changed to be like this
e644eaaf-a573-44e0-bb38-c9a6b56f1406-image.png

You are right it cannot be solved because I just create new widget again. How to update my widget? How to avoid "new" QWidget? i'm so sorry this is my senior code and I'm newbie in QT

]]>https://forum.qt.io/post/686196https://forum.qt.io/post/686196Fri, 22 Oct 2021 08:20:03 GMT<![CDATA[Reply to Resize the "setGeometry" from cpp on Fri, 22 Oct 2021 07:23:00 GMT]]>@mimamrafi In Qt, if you are manually resizing widgets inside other widgets then you are usually going about your UI the wrong way. Qt has a layout system to arrange contained widgets and this is almost always a set-and-forget problem.

]]>https://forum.qt.io/post/686174https://forum.qt.io/post/686174Fri, 22 Oct 2021 07:23:00 GMT<![CDATA[Reply to Resize the "setGeometry" from cpp on Fri, 22 Oct 2021 07:17:53 GMT]]>@mimamrafi
Hello and welcome.

But it also add the widget

You go QWidget * channel = new QWidget(this);, so, yes, that creates and adds a new widget.

We don't know what your new channelFrame(channel) is.

I want to resize my widget

What widget? Some existing one?? The newly created channel one? The newly created channelFrame, which we don't even know whether it is a widget?

]]>https://forum.qt.io/post/686172https://forum.qt.io/post/686172Fri, 22 Oct 2021 07:17:53 GMT