Get QtGraphs with XYModelMapper working
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Try to expose the xMin and xMan as properties with a NOTIFY signal instead to make the min and max binding automatically update. I guess it is currently calling returnXmin/max initially when the model is maybe empty, and then it isn't called again.
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@Igor23 add the following in your model
Q_PROPERTY( float minX MEMBER m_fMinX NOTIFY minXChanged )
define m_fMinX and signal minXChanged in your model.Do the same for maxX.
and
ValueAxis { id: axisX min: Graphsmodel.minX max: Graphsmodel.maxX titleText: "X-Achse" } -
And I have a second additional question: is there maximum number of points I can draw via Lineseries and XYModelMapper? It seems to me as there is a limit by Qt framework ...
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The LineSeries type has a count property that returns the number of data points in the series so I would venture that the maximum int value is the limit but I wouldn't try to show that many data point anyway because it does not make sense. If anything, I would rather allow the user to zoom in/out of sections of a LineSeries if they need more precise data.
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@Igor23 add the following in your model
Q_PROPERTY( float minX MEMBER m_fMinX NOTIFY minXChanged )
define m_fMinX and signal minXChanged in your model.Do the same for maxX.
and
ValueAxis { id: axisX min: Graphsmodel.minX max: Graphsmodel.maxX titleText: "X-Achse" } -
I Igor23 has marked this topic as solved
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I Igor23 has marked this topic as unsolved
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Sorry, I still have a question: How can I make a logarithmic scale to one axis? I didn't find in the web - only for 3D.
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