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Thread: Multiple colors QLineSeries in QtCharts

  1. #1
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    Default Multiple colors QLineSeries in QtCharts

    Hi everybody!

    I'd like to plot a custom QLineSeries in a QtChart. I need to split a QLineSeries in multiple sections, each one with a different color. I have tried to change the QPen, the QBrush and the QColor of the series, but it affects all the plotted data, and that's not what i want.

    What I am looking for is to call a QLineSeries method which changes the color of the plotted data, but maintaining old data with the color it was painted. Is it posible to do it?

    Thank you in advance!

    Cristian

  2. #2
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    Default Re: Multiple colors QLineSeries in QtCharts

    Is it posible to do it?
    Nope. QtCharts is the most brain-dead, inflexible library ever released as part of Qt. You can't customize anything, because everything is hidden away in private base classes, there are no virtual methods, and so you can't derive a custom class from anything. You are stuck with what you get, and if you don't like what you get, you're stuck.

    The only way to get different colors for any QSeries is to break the QSeries into multiple series, with one color for each series.
    <=== The Great Pumpkin says ===>
    Please use CODE tags when posting source code so it is more readable. Click "Go Advanced" and then the "#" icon to insert the tags. Paste your code between them.

  3. #3
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    Default Re: Multiple colors QLineSeries in QtCharts

    Hi d_stranz,

    thank you for your answer. That is exactly what I thought, but I was hoping to be wrong.

    I will have to think in another way of doing it...

    Thank you!

    Cristian

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