Add separate plus and minus signs.

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)
+
+

share/library/Misc/voltage-source.lua

@@ -14,8 +14,7 @@ local names_dc =
 }
 
 -- Render area in base units (X1, Y1, X2, Y2)
-local area_ac = {-2, -2, 2, 2}
-local area_dc = {-2, -2, 3, 2}
+local area = {-2, -2, 2, 2}
 
 -- Terminal points
 local terminals = {{-2, 0}, {2, 0}, {0, -2}, {0, 2}}
@@ -51,18 +50,11 @@ local render_dc = function (cr)
 	cr.move_to (0.2, 0.25)
 	cr.line_to (1, 0.25)
 
-	-- Polarity sign
-	cr.move_to (2.6, -0.6)
-	cr.line_to (2.6, -1.4)
-
-	cr.move_to (2.2, -1)
-	cr.line_to (3.0, -1)
-
 	cr.stroke ()
 end
 
--- Register the symbol
-logdiag.register ("ACSource", names_ac, area_ac, terminals, render_ac)
-logdiag.register ("DCSource", names_dc, area_dc, terminals, render_dc)
+-- Register the symbols
+logdiag.register ("ACSource", names_ac, area, terminals, render_ac)
+logdiag.register ("DCSource", names_dc, area, terminals, render_dc)