From 9d9b8eb7ed399f214b2561c7a06097a8a9639ad0 Mon Sep 17 00:00:00 2001
From: Michael Schindler <m-schindler@users.sourceforge.net>
Date: Tue, 25 Mar 2008 14:07:10 +0000
Subject: [PATCH] added an example for varying the symbol and line styles

git-svn-id: https://pyx.svn.sourceforge.net/svnroot/pyx/trunk/pyx@2970 069f4177-920e-0410-937b-c2a4a81bcd90
---
 examples/graphstyles/INDEX         |  1 +
 examples/graphstyles/usesymbol.py  | 18 ++++++++++++++++++
 examples/graphstyles/usesymbol.txt | 11 +++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 examples/graphstyles/usesymbol.py
 create mode 100644 examples/graphstyles/usesymbol.txt

diff --git a/examples/graphstyles/INDEX b/examples/graphstyles/INDEX
index 82f1d034..3cd0a0d4 100644
--- a/examples/graphstyles/INDEX
+++ b/examples/graphstyles/INDEX
@@ -1,4 +1,5 @@
 errorbar
 histogram
+usesymbol
 changesymbol
 cal
diff --git a/examples/graphstyles/usesymbol.py b/examples/graphstyles/usesymbol.py
new file mode 100644
index 00000000..91c04a2d
--- /dev/null
+++ b/examples/graphstyles/usesymbol.py
@@ -0,0 +1,18 @@
+from pyx import *
+
+# colors and symbols to use (alternatingly)
+colors = [color.rgb.red, color.rgb.green, color.rgb.blue, color.gray.black]
+symbols = [graph.style._diamondsymbol, graph.style._trianglesymbol, graph.style._circlesymbol]
+
+# create the graph styles to be used below
+symbol = graph.style.symbol(symbol=attr.changelist(symbols),
+                            symbolattrs=[deco.stroked.clear,
+                                         attr.changelist([deco.filled([cc]) for cc in colors])])
+line = graph.style.line(lineattrs=[attr.changelist(colors),
+                                   attr.changelist([style.linestyle.solid])])
+
+g = graph.graphxy(width=8, x=graph.axis.linear(min=0, max=1))
+g.plot([graph.data.function("y(x) = x**%d" % i, points=8) for i in range(1, 7)],
+       styles=[line, symbol])
+g.writeEPSfile("usesymbol")
+g.writePDFfile("usesymbol")
diff --git a/examples/graphstyles/usesymbol.txt b/examples/graphstyles/usesymbol.txt
new file mode 100644
index 00000000..5f0bed4c
--- /dev/null
+++ b/examples/graphstyles/usesymbol.txt
@@ -0,0 +1,11 @@
+Using the functionality of existing graph styles
+
+This example demonstrates how linestyles, symboltypes, colors, and other
+decorations can be changed in existing graph styles. ... We make use of the
+`changelist' feature as an argument when using a style. Generally, all items in
+the attribute lists can be iterable `changelists'. If the end of such a list is
+reached, the changelist restarts from its beginning (see e.g. the colors which
+are used several times).
+
+The `attr.stroked.clear' in the symbol deletes the default property of the
+symbols, which says to stroke the symbol outline.
-- 
2.11.4.GIT