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"""PySide2 QtDataVisualization example"""

import sys
from PySide2.QtCore import Qt
from PySide2.QtGui import QGuiApplication
from PySide2.QtWidgets import QApplication, QSizePolicy, QMainWindow, QWidget
from PySide2.QtDataVisualization import QtDataVisualization

def dataToBarDataRow(data):
    return list(QtDataVisualization.QBarDataItem(d) for d in data)

def dataToBarDataArray(data):
    return list(dataToBarDataRow(row) for row in data)

class MainWindow(QMainWindow):

    def __init__(self):
        super(MainWindow, self).__init__()

        self.setWindowTitle('Qt DataVisualization 3D Bars')

        self.bars = QtDataVisualization.Q3DBars()

        self.columnAxis = QtDataVisualization.QCategory3DAxis()
        self.columnAxis.setTitle('Columns')
        self.columnAxis.setTitleVisible(True)
        self.columnAxis.setLabels(['Column1', 'Column2'])
        self.columnAxis.setLabelAutoRotation(30)

        self.rowAxis = QtDataVisualization.QCategory3DAxis()
        self.rowAxis.setTitle('Rows')
        self.rowAxis.setTitleVisible(True)
        self.rowAxis.setLabels(['Row1', 'Row2'])
        self.rowAxis.setLabelAutoRotation(30)

        self.valueAxis = QtDataVisualization.QValue3DAxis()
        self.valueAxis.setTitle('Values')
        self.valueAxis.setTitleVisible(True)
        self.valueAxis.setRange(0, 5)

        self.bars.setRowAxis(self.rowAxis)
        self.bars.setColumnAxis(self.columnAxis)
        self.bars.setValueAxis(self.valueAxis)

        self.series = QtDataVisualization.QBar3DSeries()
        self.arrayData = [[1, 2], [3, 4]]
        self.series.dataProxy().addRows(dataToBarDataArray(self.arrayData))

        self.bars.setPrimarySeries(self.series)

        self.container = QWidget.createWindowContainer(self.bars)

        if not self.bars.hasContext():
            print("Couldn't initialize the OpenGL context.")
            sys.exit(-1)

        camera = self.bars.scene().activeCamera()
        camera.setYRotation(22.5)

        geometry = QGuiApplication.primaryScreen().geometry()
        size = geometry.height() * 3 / 4
        self.container.setMinimumSize(size, size)

        self.container.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.container.setFocusPolicy(Qt.StrongFocus)
        self.setCentralWidget(self.container)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWin = MainWindow()
    mainWin.show()
    sys.exit(app.exec_())
