Add separate plus and minus signs.

1 files changed, 46 insertions, 0 deletions

diff --git a/share/library/Misc/signs.lua b/share/library/Misc/signs.lua
new file mode 100644
index 0000000..2f197a1
--- /dev/null
+++ b/share/library/Misc/signs.lua
@@ -0,0 +1,46 @@
+-- Symbol names
+local names_plus =
+{
+	en = "Plus sign",
+	cs = "Znaménko plus",
+	sk = "Znamienko plus"
+}
+
+local names_minus =
+{
+	en = "Minus sign",
+	cs = "Znaménko mínus",
+	sk = "Znamienko mínus"
+}
+
+-- Render area in base units (X1, Y1, X2, Y2)
+local area = {-0.5, -0.5, 0.5, 0.5}
+
+-- Terminal points
+local terminals = {}
+
+-- Rendering
+local render_plus = function (cr)
+	-- The plus sign
+	cr.move_to (0, -0.4)
+	cr.line_to (0, 0.4)
+
+	cr.move_to (-0.4, 0)
+	cr.line_to (0.4, 0)
+
+	cr.stroke ()
+end
+
+local render_minus = function (cr)
+	-- The minus sign
+	cr.move_to (-0.4, 0)
+	cr.line_to (0.4, 0)
+
+	cr.stroke ()
+end
+
+-- Register the symbols
+logdiag.register ("SignPlus",  names_plus,  area, terminals, render_plus)
+logdiag.register ("SignMinus", names_minus, area, terminals, render_minus)
+
+