#!/usr/bin/python

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"""PySide2 QtDataVisualization example"""

import os
import sys
from PySide2.QtCore import QRect, QSize, QProcess, Qt
from PySide2.QtGui import QGuiApplication, QScreen, QWindow
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_())
