74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
from qtpy import QtCore as QC
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try:
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from qtpy import QtCharts as QCh
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QT_CHARTS_OK = True
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class BarChartBandwidthHistory( QCh.QtCharts.QChartView ):
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def __init__( self, parent, monthly_usage ):
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QCh.QtCharts.QChartView.__init__( self, parent )
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divisor = 1.0
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unit = 'B'
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highest_usage = max( ( m[1] for m in monthly_usage ) )
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lines = [ ( 1073741824.0, 'GB' ), ( 1048576.0, 'MB' ), ( 1024.0, 'KB' ) ]
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for ( line_divisor, line_unit ) in lines:
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if highest_usage > line_divisor:
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divisor = line_divisor
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unit = line_unit
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break
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monthly_usage = [ ( month_str, month_value / divisor ) for ( month_str, month_value ) in monthly_usage ]
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( month_strs, month_values ) = zip( *monthly_usage )
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bar_set = QCh.QtCharts.QBarSet( 'Bandwidth' )
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x_category_axis = QCh.QtCharts.QBarCategoryAxis()
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bar_set.append( month_values )
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x_category_axis.append( month_strs )
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y_value_axis = QCh.QtCharts.QValueAxis()
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y_value_axis.setRange( 0.0, ( highest_usage * 1.2 ) / line_divisor )
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y_value_axis.setTitleText( '({})'.format( unit ) )
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y_value_axis.applyNiceNumbers()
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bar_series = QCh.QtCharts.QBarSeries()
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bar_series.append( bar_set )
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chart = QCh.QtCharts.QChart()
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chart.addSeries( bar_series )
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chart.addAxis( x_category_axis, QC.Qt.AlignBottom )
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chart.addAxis( y_value_axis, QC.Qt.AlignLeft )
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chart.legend().setVisible( False )
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bar_series.attachAxis( x_category_axis )
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bar_series.attachAxis( y_value_axis )
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self.setChart( chart )
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except:
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QT_CHARTS_OK = False
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