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  1. #1
    Join Date
    Jan 2017
    Qt products

    Default Place two pie charts side by side on one gridLayout

    Using QChart and QChartView I show a single pie chart on a Ui with a gridLayout built in Qt Creator/Designer. I would now like to show two piecharts on the same grid layout -- side by side - with each chart taking up half the grid (vertically speaking) -- essentially making two big, equal-sized columns.
    I use this code to show the first pie:
    Qt Code:
    1. series = QPieSeries()
    2. chart = QChart()
    3. # the pie chart is made here
    4. self.chartView = QChartView(chart)
    5. self.ui.gridLayout.addWidget(self.chartView)
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    and have duplicate code (with different pie data) below it for the second pie.
    The resulting charts show one on top of the other stretching across the UI, and the top pie takes up 3/4 of vertical space and the other gets 1/4 of the vertical space.

    I have played around with various combinations of positioning, like:
    Qt Code:
    1. self.ui.gridLayout.addWidget(self.chartView, 0, 1)
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    but nothing works. Is there a way to get what I want without redesigning the UI with two grid layouts?

  2. #2
    Join Date
    Jan 2008
    Alameda, CA, USA
    Thanked 711 Times in 701 Posts
    Qt products
    Windows Android

    Default Re: Place two pie charts side by side on one gridLayout

    According to the QGridLayout docs, there is no addWidget() method that takes only a single argument. So, PyQt must be defaulting these arguments to something, but I don't know what. You should at least provide 0, 0 as the second two arguments.

    You can't add the same chartView instance to a layout more than once. So the instances in cell 0, 0 and 0, 1 must be different.

    Unless you also plan to put other things in this layout, why don't you just use a QHBoxLayout instead? Then you simply call addWidget() without the need for row or column numbers.
    <=== 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.

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