QCharts provides various 2D chart types to be used within Qt Widgets or Qt Quick applications.
Questions tagged [qchart]
120 questions
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QValueAxis show messy code (chinese language)?
in my chart the x axis need to show chinese and y axis need to show english, but x axis show messy code. can any one help me?
self.chart.createDefaultAxes()
axis_x, axis_y =…
jett chen
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1 answer
QChart add axis not show and when hovered info not work correct?
I am use pyqt5 to draw a simple chart and need to add custom axis, but when i add axis , the chart not show it, and when hovered signal emit, i need to show corresponding point , but it also not showing, it need to click to show.
class…
jett chen
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2 answers
Qt. Add widgets to QChart, QChartview
Currently, I am writing a code that plots some 2D-Data (splines) using QChartView and QChart. I want to add some graphics objects like rectangles or even images to the graphs. Is this possible? There seem to be no methods like draw rectangle within…
Angelina
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PySide2 How to place a detached legend to another widget?
Recently, I've found that my QChart legend can be detached and placed into another, independent widget. Qt documentation says that a QLegend class method QLegend::detachFromChart() may separate legend from the chart.
Unfortunately, when I try to add…
Artem
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How to include bars in in a QChart with QValueAxis?
I need a combined chart showing multiple lineseries (given by x,y values) and bars (given by x_start,x_end and y values; somewhat like a histogram) in QtCharts.
Unfortunately it is not possible to assign a QValueAxis to a QBarseries, so I can't…
ablerks
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- 6
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2 answers
AttributeError: 'QScatterSeries' object has no attribute 'points'
Pretty much what the title says. I have a QScatterSeries object. I can load data into it and add it to a QChart, but if I try to pull the data back out of it with something like...
from PyQt5.QtChart import QScatterSeries
from PyQt5.QtCore import…
J Webster
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1 answer
Qt, pass data to another class
I want to pass int testing to dialog.cpp when a push button is clicked from the mainwindow.cpp.
I got an error message as follows: "missing default argument on parameter testing"
What did I do wrong?
dialog.h
#include
namespace Ui…
lll
- 302
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1 answer
How to Remove Spacing between chartview and it's Plotarea in QML
1) My requirement is that Plotarea of chartview in Qml should acquire whole space.
2) I don't want spacing between chartview and plotarea grids.
3) For this, i made
margins.top: 0
margins.bottom: 0
margins.left: 0
margins.right: 0
4) After Doing…
BHUSHAN SURE
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1 answer
Draw a point on a QChart
I'm trying to draw a point where I click on a QChart. To do so I've created a "ChartWidget" class that inherits QChart and overrided the paint method like this :
void ChartWidget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,…
Kyew
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QChart not displaying any series data when using QDateTimeAxis
I want to display a real-time plot using QChart and QLineSeries where X values are timestamps. Everything works as expected when I use QValueAxis for X axis, but switching to QDateTimeAxis results in no data being plotted - just an empty…
w128
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1 answer
qt get child (Callout) from QChart
I implemented a custom Callout class like in this example Callout Example
QPolarChart *chart = new QPolarChart();
Callout *callout = new Callout(chart);
If I have only access to chart (callout went out of scope), how can I regain access to callout.…
user7431005
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2 answers
Updating QChart from QLineSeries in a running while loop
I want to make my QChart dynamically update whenever a point is added to the QLineSeries object attached to it, but it seems that this update only occurs after the while loop I am running has finished. I am using said while loop in interface.cpp…
random_0620
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How to change width of individual QBarSet in a QStackedBarSeries?
I'm trying to create a mosaic plot series to include in a widget.
QStackedBarSeries seems like the best place to start but I'm unable to change the width of individual bars in it. (please correct me if there is a better/simpler starting point!)
I…
XababaX
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1 answer
Qt: QPolarChart with categorial angular axis
I would like to replace the degrees of an angular axis in a QPolarChart with
some text like shown in the attached figure (e.g instead of 90.0 -> "Cat 1").
I tried QCategoryAxis but in this case the categories appeared between the axis (e.g between…
Michael
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1 answer
How to map QChart coordinate to QChartView point?
I want to make a rubber band window in QChart, but I don't know how to map a coordinate of QChart to QChartView.
e.g.
(0, 0) is a QChart coordinate, maybe it in QChartView is (10, 10), how to transform it?
I have saw the answer of Get mouse…
Jacky
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