"Horizontal bar with red axis negative labels"
import reportlab
from reportlab.graphics.charts.barcharts import HorizontalBarChart
from reportlab.graphics.shapes import Drawing, _DrawingEditorMixin
from reportlab.lib.colors import PCMYKColor
from reportlab.graphics.charts.textlabels import RedNegativeChanger

class HBarChartWRedXValueAxisNegLabels(_DrawingEditorMixin,Drawing):
    '''
Chart Features
--------------
This is a simple horizontal barchart whose XVAlueAxis is modified to make the negative tick labels turn red.

        - The xValueAxis has negative tick labels coloured red. That is accomplished by changing the Label attribute customDrawChanger to be an instance of
        reportlab.graphics.charts.textlabels.RedNegativeChanger.

        This chart was built with our [Diagra](http://www.reportlab.com/software/diagra/) solution.

        Not the kind of chart you looking for? Go [up](..) for more charts, or to see different types of charts click on [ReportLab Charts Gallery](/chartgallery/).
    '''
    def __init__(self,width=400,height=200,*args,**kw):
        Drawing.__init__(self,width,height,*args,**kw)
        self._add(self,HorizontalBarChart(),name='chart',validate=None,desc=None)
        self.chart.y                = 20
        self.chart.data             = [(100, -110, 120, 130), (70, 80, 85, 90)]
        self.chart.width       = self.width - 2*self.chart.x
        self.chart.height      = self.height-self.chart.y-5
        self.chart.valueAxis.labels.customDrawChanger=RedNegativeChanger()
        self.chart.bars[0].fillColor   = PCMYKColor(100,60,0,50,alpha=85)
        self.chart.bars[1].fillColor   = PCMYKColor(100,0,90,50,alpha=85)

if __name__=="__main__": #NORUNTESTS
    HBarChartWRedXValueAxisNegLabels().save(formats=['pdf'],outDir='.',fnRoot=None)