<![CDATA[How to acces ui elements from another page?]]>I have a this code for get avaiable serial ports on Main Window.

QString parsedPortName = QSerialPortInfo::availablePorts().at(ui -> comboBoxDevices -> currentIndex()).portName();

I need access this avaiable ports from another Page. Hiw can I do that?

Here, on my Second Window I need replace avaiable comports with (QString("COM3")

if (serialStartStop.begin(QString("COM3"), 9600, 8, 0, 1, 0, false)  ) {
           serialStartStop.send("B" + ui->baslatmaedit->text().toLatin1() + "D"+  ui->durdurmaedit->text().toLatin1());

       }
]]>https://forum.qt.io/topic/138150/how-to-acces-ui-elements-from-another-pageRSS for NodeThu, 23 Apr 2026 15:05:49 GMTMon, 25 Jul 2022 12:16:30 GMT60<![CDATA[Reply to How to acces ui elements from another page? on Mon, 25 Jul 2022 17:42:12 GMT]]>@mangekoyu
You already know that: QSerialPortInfo::availablePorts().

Call that where you want them, or have main window call it and pass the result to some other window/page if that is how you want to do it.

]]>https://forum.qt.io/post/722638https://forum.qt.io/post/722638Mon, 25 Jul 2022 17:42:12 GMT<![CDATA[Reply to How to acces ui elements from another page? on Mon, 25 Jul 2022 14:55:28 GMT]]>@JonB said in How to acces ui elements from another page?:

a pencere diğer pencereyi/sayfayı oluşturuyorsa, neden o pencerede/sayfada hangi bağlantı noktası

So, How can I get avaiable serial ports? I just need get avaiabvle serial ports.

]]>https://forum.qt.io/post/722613https://forum.qt.io/post/722613Mon, 25 Jul 2022 14:55:28 GMT<![CDATA[Reply to How to acces ui elements from another page? on Mon, 25 Jul 2022 14:24:21 GMT]]>@mangekoyu
It is not a good design decision to have other windows know about/call things in a main window you have. It makes them dependent on there being a main window, and accessing it.

If the main window creates the other window/page why not have it call a public method in that window/page to tell it which port has been selected? Or emit a signal when the choice changes to which it has attached a slot in the other page/window which wants to know?

]]>https://forum.qt.io/post/722587https://forum.qt.io/post/722587Mon, 25 Jul 2022 14:24:21 GMT<![CDATA[Reply to How to acces ui elements from another page? on Mon, 25 Jul 2022 12:46:38 GMT]]>@jsulm said in How to acces ui elements from another page?:

I don't want select comport again on second wondow. Just I want get selected port on second window.

]]>https://forum.qt.io/post/722572https://forum.qt.io/post/722572Mon, 25 Jul 2022 12:46:38 GMT<![CDATA[Reply to How to acces ui elements from another page? on Mon, 25 Jul 2022 12:26:46 GMT]]>@mangekoyu said in How to acces ui elements from another page?:

QSerialPortInfo::availablePorts()

availablePorts is a static method, so simply do it in the same way you are doing in MainWindow.
Or what is the problem?

]]>https://forum.qt.io/post/722569https://forum.qt.io/post/722569Mon, 25 Jul 2022 12:26:46 GMT