Navigation

    Qt Forum

    • Login
    • Search
    • Categories
    • Recent
    • Tags
    • Popular
    • Search
    • Unsolved
    1. Home
    2. Tags
    3. charts
    Log in to post

    • UNSOLVED Can multiple qml ChartView widgets share a single LineSeries widget?
      QML and Qt Quick • qml charts real time plot • • Rob McLean  

      1
      0
      Votes
      1
      Posts
      55
      Views

      No one has replied

    • UNSOLVED Fixed length auto update real time chart ploting In QML.
      General and Desktop • qml charts qml c++ real time plot • • vicky_mac  

      1
      0
      Votes
      1
      Posts
      90
      Views

      No one has replied

    • SOLVED Multiline labels or word wrap for BarCategoryAxis labels
      QML and Qt Quick • qml charts wordwrap labels • • voltron  

      3
      0
      Votes
      3
      Posts
      151
      Views

      Making the width and height of ChartView the same size as the project window (640x480) allows the text to display in full. Assuming you're not restricted on the size of your ChartView of course.
    • UNSOLVED How can i add a scroll bar for QCharts Legend
      General and Desktop • qt5 charts legend • • deleted286  

      4
      0
      Votes
      4
      Posts
      467
      Views

      @suslucoder There is no scrollBar by default but you can increase the space for your QLegend https://doc.qt.io/qt-5/qtcharts-legend-example.html#detaching-and-attaching-legends Or you put a custom legend in a QScrollArea
    • UNSOLVED The program has unexpectedly finished
      General and Desktop • qt5 charts • • deleted286  

      8
      0
      Votes
      8
      Posts
      529
      Views

      @Pl45m4 thank you
    • UNSOLVED Completely customizing charts
      General and Desktop • qml charts styles • • raketmus  

      7
      0
      Votes
      7
      Posts
      371
      Views

      Found this https://github.com/milosolutions/mcharts it might be what i need as chart.js seems to be very customizable.
    • UNSOLVED QT Pie chart labels are overlapping.
      General and Desktop • c++ charts labels • • SalmanKhaja  

      2
      0
      Votes
      2
      Posts
      214
      Views

      Same issue, any sollution ?
    • UNSOLVED Multiple Line Chart
      General and Desktop • qt5 charts multiple charts • • deleted286  

      7
      0
      Votes
      7
      Posts
      537
      Views

      @suslucoder There is no scrollbar. If you want one, you have to make one on your own, but it wouldn't make any sense. You have your data and you have your series. Now you can decide which parts you want to show in your chart (this is the "scrolling")
    • UNSOLVED How could I optimize a scrolling (not scrollable) QtQuick Chart?
      QML and Qt Quick • qtquick charts optimization • • tague  

      2
      0
      Votes
      2
      Posts
      224
      Views

      @tague Are you currently updating every time a point is added? If so, I wondered if you could buffer the incoming data so that you do not update so frequently? Perhaps use a QTimer to control update frequency.
    • UNSOLVED QtCharts::QLineSeries(0x2ea7560, There is no data on chart
      General and Desktop • qt5 charts threads • • deleted286  

      4
      0
      Votes
      4
      Posts
      325
      Views

      @suslucoder said in QtCharts::QLineSeries(0x2ea7560, There is no data on chart: error says QtCharts::QLineSeries(0x2ea7560) What "error"? qDebug()<< series; Maybe QtCharts::QLineSeries(0x2ea7560) is what that prints when you ask it to print a QLineSeries *? Since it is a pointer, maybe you intended to go qDebug()<< *series;?
    • UNSOLVED How can i get the data from my mythread object back to MainWindow.?
      General and Desktop • qt5 charts threads • • deleted286  

      10
      0
      Votes
      10
      Posts
      516
      Views

      @suslucoder
    • UNSOLVED Assign specific value to axis
      General and Desktop • charts read axis • • deleted286  

      2
      0
      Votes
      2
      Posts
      165
      Views

      @suslucoder said in Assign specific value to axis: I want to assign axis Y the 3rd column. How can i do it? The axis does not know anything about that file and columns inside it. You simply need to read your file and put data from that third column as data for Y axis. See https://doc.qt.io/qt-5/qxyseries.html If you read documentation https://doc.qt.io/qt-5/qxyseries.html#append you will see that you have to provide X AND Y...
    • UNSOLVED LineSeries with QAbstractListModel's roles
      QML and Qt Quick • qml charts qabstractlistmo line spline • • Tyrannic  

      12
      0
      Votes
      12
      Posts
      561
      Views

      @fcarney I put the QAbstractItemModelTester in both my model, and my proxy model, and... no errors. I also swapped it to FailureReportingMode::Fatal to double check, and nothing. The endless calls to data from VXYModelMapper continue.
    • UNSOLVED Latlong position over any world map image using at charts
      General and Desktop • qt5 image charts qtchart • • vicky_mac  

      3
      0
      Votes
      3
      Posts
      278
      Views

      @Kent-Dorfman thanx for reply. Actually I saw few java script programs for pointing accurate pixel values on image by using Mercator projection and it's formula. I checked it works fine in Java script. But in qt I want to display whole lat long trace so wanted to plot chart with image as it's background. But not able to correctly det the background image as per chart x and y axis values.
    • SOLVED Qt Chart is not updated after updating the series
      General and Desktop • charts • • milan  

      12
      0
      Votes
      12
      Posts
      9718
      Views

      seen https://doc.qt.io/qt-5/qxyseries.html#replace-5 ? even if you are doing it just for one point - by destroying and creating a series over and over you do this anyhow. has to be quicker/better. I belive that also invokes https://doc.qt.io/qt-5/qxyseries.html#pointsReplaced ChartView should handle redraw and everything for you.
    • UNSOLVED Plotting 2D data
      General and Desktop • charts data visualizat • • ionick  

      1
      0
      Votes
      1
      Posts
      300
      Views

      No one has replied

    • UNSOLVED QT charts use 50% of CPU
      General and Desktop • qtcharts charts qtchart qt 5.8 • • Swapnil_Shelke  

      6
      0
      Votes
      6
      Posts
      2267
      Views

      I'd recommend using https://doc.qt.io/qt-5.10/qxyseries.html#replace-5 Replacing points one by one destroys a cpu. The metrics for me was just not even worth measuring - it was just an immediate hell no - forget that - I need faster updates. I like declarative QML for gui as a preference but calling replace on a single point fires way too many signals and takes way too long. I throw my QML LineSeries to a QXYSeries and call replace in c++ In the future I'll probably just declare my series in C++. I wish I could have a better supported hybrid of c++ and QML charts but I have this working very fast using useOpenGL : true; (you can also c++ setUseOpenGL(true) )
    • UNSOLVED Gaps in QLineSeries
      General and Desktop • charts chart qlineseries • • fantaz  

      4
      1
      Votes
      4
      Posts
      1127
      Views

      When using line series, we've had severe performance problems. We end up with thousands of series to handle all of the gaps and have to create parallel scatter series because we want icons for each point that aren't part of the standard icon set. We pay a huge cost both constructing and destructing the series. Seems like it may be refreshing on each add series, but even removeAllSeries is slow. Have tried many things to suspend the painting, but with no timing effect. Any ideas on how to have many gaps without destroying performance?
    • UNSOLVED How to customize BarCategoryAxis labels and BarSeries?
      QML and Qt Quick • qtcharts charts barchart • • Praveen_2017  

      1
      0
      Votes
      1
      Posts
      611
      Views

      No one has replied

    • UNSOLVED Center background image in QChart
      General and Desktop • charts qchart qchartview • • EliSno  

      6
      0
      Votes
      6
      Posts
      3032
      Views

      I found a solution and post it here: link
    • UNSOLVED Draw on a QChart
      General and Desktop • charts draw graphics view • • Totoro  

      1
      0
      Votes
      1
      Posts
      915
      Views

      No one has replied

    • UNSOLVED QT Charts dragable
      General and Desktop • qml charts • • ht1723  

      1
      0
      Votes
      1
      Posts
      883
      Views

      No one has replied

    • Pass data from C++ to qml using signals to update charts at runtime
      QML and Qt Quick • c++ signal charts • • SaranshVora  

      1
      1
      Votes
      1
      Posts
      1422
      Views

      No one has replied

    • SOLVED Generating embedded charts via Qt ActiveX
      General and Desktop • charts excel qaxobject activex • • alizadeh91  

      24
      0
      Votes
      24
      Posts
      7559
      Views

      Super :) oh it must have "()" on. The syntax is pretty funky via the automation server. Good work.
    • SOLVED Qt Charts crash
      QML and Qt Quick • qt 5.7 charts chart controls 2 material design • • orzel1244  

      6
      0
      Votes
      6
      Posts
      4132
      Views

      @KRHC hi and welcome to devnet, You need QApplication if you use anything that relies on the widgets module. Otherwise, there's no need for it and you would just bloat your deployment for no good reason.
    • UNSOLVED VXYModelMapper: how to define x and y values
      QML and Qt Quick • qml c++ charts models • • corianderop  

      2
      0
      Votes
      2
      Posts
      1055
      Views

      @corianderop Hi I am also stuck in a similar situation did you figure out a solution for it ?
    • UNSOLVED Tools for plotting QVector3D data ?
      General and Desktop • charts data graph visualization • • mar77  

      1
      0
      Votes
      1
      Posts
      776
      Views

      No one has replied

    • UNSOLVED Qt Charts duplicating data ?
      General and Desktop • charts • • ericlemanissier  

      1
      1
      Votes
      1
      Posts
      438
      Views

      No one has replied

    • QtQuick Bar Charts - Example?
      General and Desktop • qtquick charts graphics barchart • • maximo  

      1
      0
      Votes
      1
      Posts
      662
      Views

      No one has replied