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Qt Chart custom line series with labels

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  • S Offline
    S Offline
    St.Stanislav
    wrote on last edited by
    #1

    Hello everyone!

    I'm trying to implement custom line series with the following behaviour and appearance: Instead of points I need to display labels in appropriate y-coordinate, but with the fixed x-coordinate (that can be set different). Text that should be displayed should be equal to real x-coordinate. When I have tried to implement it with built-in plots I have faces with the issue that pointLabelsFormat property can be used with only x and y coordinate. In my case I need to use some constant x coordinate but display the real one. So this approach isn't suitable for me (looks like).

    Then I have tried to implement manually custom plot with the QGraphicsItem but in this case I have received incorrect drawing out of chart bounds (some graphical artefacts can be found there while scrolling the plot e.g.).

    What is the correct way to implement such behaviour? As I supposed this question not only about QML, but about base Qt QChart widget.

    V 1 Reply Last reply
    1
    • S St.Stanislav

      Hello everyone!

      I'm trying to implement custom line series with the following behaviour and appearance: Instead of points I need to display labels in appropriate y-coordinate, but with the fixed x-coordinate (that can be set different). Text that should be displayed should be equal to real x-coordinate. When I have tried to implement it with built-in plots I have faces with the issue that pointLabelsFormat property can be used with only x and y coordinate. In my case I need to use some constant x coordinate but display the real one. So this approach isn't suitable for me (looks like).

      Then I have tried to implement manually custom plot with the QGraphicsItem but in this case I have received incorrect drawing out of chart bounds (some graphical artefacts can be found there while scrolling the plot e.g.).

      What is the correct way to implement such behaviour? As I supposed this question not only about QML, but about base Qt QChart widget.

      V Offline
      V Offline
      Vijaykarthikeyan
      wrote on last edited by
      #2

      @St-Stanislav No,you can't modify pointdLabel

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