You can dynamically create a new line series, keep appending data till u need gap, after gap again create a new line series and keep appending data to the recently created line series.
Using count you can keep track of how many line series has been created, and using removeallseries/removeseries(index) you can clear the dynamically created series.

If you have more gaps, it will affect the performance, since we are creating a line series dynamically, load time will increase.

This how I handled the above scenario,

Yes, in another project.
QGraphicsView lays a top of QAbstaractScrollArea, so scroll bars appears there out of a box. But it requires a few lines of code to add scrolling by drag a scene.
This time I needed QML way.

You're welcome !

Since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

@vishnu The control will go ahead if and only if both properties are initialized. Its a normal & operation.

Hi @Hedge,
You have following ways to do it:

Defining QML Types from C++
In short create a QObject derived class and register it using qmlRegisterType so that it is available in QML. Exposing Attributes of C++ Types to QML
Create a QObject derived class , add some public slots or Q_INVOKABLE functions and make these available by setting that class as a contextProperty.

In both the cases it will be good idea to provide some properties defined as Q_PROPERTY with their respective signals so that QML gets notified on changes in the values of these properties from C++.

Hi,

QtCharts is a commercial package, you should rather contact the Qt Company through your Qt Account Support Center link.

BarSeries { id: currentPlot axisX: BarCategoryAxis { id: categoryAxis labelsFont:Qt.font({pointSize: 6})

Qt.font function accept an javascript object with all keys relevant to font.

The most commonly used properties are:
string font.family
bool font.bold
bool font.italic
bool font.underline
real font.pointSize
int font.pixelSize

vertexData() returns only the data in ram and not the real VBO which is stored in GPU-ram.
As soon as you mark it as dirty it gets completely copied into GPU.

Meanwhile I have implemented a direct opengl-way where I create the VBO myself.

Thanks anyway!
cu

Hi and welcome to devnet,

The best way to have information for 1 and 2 is to contact the Qt Company directly. These two modules are available to the commercial customers but you can try them with the trial package.

AFAIK, Qwt only provides widgets

I don't know that one

Hope it helps