From: QElectroTech
Date: Fri, 23 May 2026
Subject: crossrefitem: fix power contact terminal pairing in Contacts mode

Remove alphanumeric sort of terminal names for power contacts in
drawContact(). The sort was breaking consecutive-pair grouping:
e.g. [L1,L2,L3,T1,T2,T3] was sorted then paired as L1/L2, L3/T1,
T2/T3 instead of the correct L1/T1, L2/T2, L3/T3.

Terminal names are now used in declaration order from the element
editor. Users must declare pairs consecutively:
  1,2,3,4,5,6     -> pole 0=1/2,   pole 1=3/4,   pole 2=5/6
  L1,T1,L2,T2,L3,T3 -> pole 0=L1/T1, pole 1=L2/T2, pole 2=L3/T3

---
 sources/ui/crossrefitem.cpp | 16 +-------
 1 file changed, 2 insertions(+), 14 deletions(-)

--- a/sources/ui/crossrefitem.cpp
+++ b/sources/ui/crossrefitem.cpp
@@ -750,24 +750,10 @@ QRectF CrossRefItem::drawContact(QPainter &painter, int flags, Element *elmt, in
 	}
 
 	if (is_power_ctc) {
-		// Sort terminals alphanumerically so names like "R1","R2"... or "1","2"...
-		// are ordered correctly. Extract trailing digits for numeric comparison;
-		// fall back to full string comparison when no digits are found.
-		std::sort(terminal_names.begin(), terminal_names.end(),
-			[](const QString &a, const QString &b){
-				// Extract trailing numeric part
-				int i_a = a.size();
-				while (i_a > 0 && a[i_a-1].isDigit()) --i_a;
-				int i_b = b.size();
-				while (i_b > 0 && b[i_b-1].isDigit()) --i_b;
-				bool a_ok = false, b_ok = false;
-				int ai = a.mid(i_a).toInt(&a_ok);
-				int bi = b.mid(i_b).toInt(&b_ok);
-				if (a_ok && b_ok && a.left(i_a) == b.left(i_b))
-					return ai < bi;
-				return a < b;
-			});
-		// Pick the pair for this pole: pole 0 -> [0,1], pole 1 -> [2,3], etc.
+		// No sorting: terminals are used in declaration order from the element editor.
+		// Users must declare terminals as consecutive pairs: [in1, out1, in2, out2, ...]
+		// e.g. 1,2,3,4,5,6   -> pole 0=1/2, pole 1=3/4, pole 2=5/6
+		// e.g. L1,T1,L2,T2,L3,T3 -> pole 0=L1/T1, pole 1=L2/T2, pole 2=L3/T3
 		int idx = pole_index * 2;
 		if (idx + 1 < terminal_names.size())
 			terminal_names = QStringList() << terminal_names[idx] << terminal_names[idx+1];