Draws the foreground for this scene.
        
        :param      painter | <QPainter>
                    rect    | <QRect>

def drawForeground(self, painter, rect):
        """
        Draws the foreground for this scene.
        
        :param      painter | <QPainter>
                    rect    | <QRect>
        """
        gantt  = self.ganttWidget()
        header = gantt.treeWidget().header()
        width  = self.sceneRect().width()
        height = header.height()
        
        for tile_rect, tile in self._tiles:
            painter.drawPixmap(tile_rect.x(), rect.top(), tile)
        
        palette = self.palette()
        textColor = palette.color(palette.Button).darker(125)
        painter.setPen(textColor)
        painter.drawLine(0, rect.top() + height, width, rect.top() + height)