[reportlab-users] barchart background (repost for archive)

[Dirk Datzert]

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Hi,

I missed a background option for barcharts and modified my local
version.
I sent my changes for discussion or integration purpose.

chart.background = ShadedRect()
chart.background.fillColorStart = colors.blue
chart.background.fillColorEnd = colors.red

chart.background.x,y,width,height will be set in makeBackground()

default is chart.background = None
and the default makeBackground() mechanism will be used.

Regards,
Dirk
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--- barcharts.py.orig	Sat Jul 27 12:42:21 2002
+++ barcharts.py	Sun Jul 28 22:56:40 2002
@@ -65,6 +65,7 @@
 		barLabelFormat = AttrMapValue(None, desc='Formatting string or function used for bar labels.'),
 		reversePlotOrder = AttrMapValue(isBoolean, desc='If true, reverse common category plot order.'),
 		naLabel = AttrMapValue(NoneOrInstanceOfNA_Label, desc='Label to use for N/A values.'),
+        background = AttrMapValue(None, desc='Handle to background object.'),
 		)
 
 	def __init__(self):
@@ -129,9 +130,20 @@
 		self.bars[2].fillColor = colors.blue
 		self.naLabel = None#NA_Label()
 
+	self.background = None
+
 	def makeBackground(self):
 		strokeColor,strokeWidth,fillColor=self.strokeColor, self.strokeWidth, self.fillColor
-		if (strokeWidth and strokeColor) or fillColor:
+        if self.background is not None:
+            g = Group()
+            bg = self.background
+            bg.x = self.x
+            bg.y = self.y
+            bg.width = self.width
+            bg.height = self.height
+            g.add(bg)
+            return g
+        elif (strokeWidth and strokeColor) or fillColor:
 			g = Group()
 			g.add(Rect(self.x, self.y, self.width, self.height,
 				strokeColor=strokeColor, strokeWidth=strokeWidth, fillColor=fillColor))



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