QML and Qt Quick

This is not sustainable. Cache the data to disk and load n points from this cache. Give yourself the ability to scroll through the data that was collected. Maybe a date time lookup. I like to use sqlite databases for stuff like this and then I just do queries using the qdatabase classes.

@Praveen-Illa There is currently no way to give each data point in the same series a different colour. As a workaround, you can split your data points into multiple series (for example, 1 point per series). This will allow you to set different colours to each of the points.

@chiyuwang Your model should provide a role name for the desired value, let's say value, then you can inform the combobox via its valueRole property. See the example below, copied from Qt documentation ApplicationWindow { width: 640 height: 480 visible: true // Used as an example of a backend - this would usually be // e.g. a C++ type exposed to QML. QtObject { id: backend property int modifier } ComboBox { textRole: "text" valueRole: "value" // When an item is selected, update the backend. onActivated: backend.modifier = currentValue // Set the initial currentIndex to the value stored in the backend. Component.onCompleted: currentIndex = indexOfValue(backend.modifier) model: [ { value: Qt.NoModifier, text: qsTr("No modifier") }, { value: Qt.ShiftModifier, text: qsTr("Shift") }, { value: Qt.ControlModifier, text: qsTr("Control") } ] } }

@Bob64 The fortune client/server apps are different from (at least) that point of view that the server sends messages to the client by a button on the client. It's way different from mine. Well, these two QML apps are considerably simple but I don't know why we (helpers and me) can't work it out and get them to work! :(

@jsulm I wrote the error message

@lemons working like charm ! @GrecKo thanks i will review

Hi again. This same behavior is described in this bug report: https://bugreports.qt.io/browse/QTBUG-90479 But how is Tumbler related to PathView? I tried to load the model dynamically, to change the currentIndex dynamically, etc. but I get the same result. Do you have any idea or workaround? Thanks!

@DavidIT said in How do I run a program in QT creator?: qt5-qtquickcontrols2. Installed what you wrote. it helped, thank you

In addition to what @lemons said, model property is not updated when you changed the check box from UI. Hence the issue. You can try with following piece of code inside the CheckBox. onClicked: { _root.ListView.view.model.setProperty(1, "mystatus",checked) }

when I rerun, I am told that QtWebView cannot contain more than one item, so I guess I cannot save a c++ class in QtWebView, going through the doc I found that the c++ classes I needed had already been extended to the quick module. So, I'm going to use the c++ classes in this module instead. Thank you very much for your help.

@fcarney Wow excellent, this work very well. Thank you very much for your help

Which Qt Quick version are you importing in your QML file? My guess is that you should replace import QtQuick 2.0 by import QtQuick 2.15.

@Snorlax In QMake you will have to write a custom build step, see https://doc.qt.io/qt-5/qmake-advanced-usage.html