crossrefitem: display terminal names on contact symbols in Xref

When a slave element has named terminals in its element definition
(.elmt), the terminal names (e.g. 13/14 for NO, 11/12 for NC,
12/13/14 for SW) are now displayed on each side of the contact
symbol in the cross-reference view.

- NO/NC contacts: name[0] on the left, name[1] on the right
- SW contacts: name[0] (NO) top-left, name[1] (common) top-right,
  name[2] (NC) bottom-left

Terminal names are read from Terminal::name() which is populated
from TerminalData::m_name during element parsing. If terminals are
not named, nothing is displayed (fully backward compatible).

Users are expected to name their own terminals in the element
editor to avoid duplicating elements in the official collection.

.github/workflows/windows-msi.yml

@@ -75,10 +75,21 @@ jobs:
           $count = git rev-list HEAD --count 2>$null
           $rev = [int]$count + 473
           $verDisplay = "${ver}-r${rev}-${sha}_x86_64-win64"
+          # Generate a unique ProductCode GUID from the commit SHA
+          # This ensures MajorUpgrade always triggers, even for same-version builds
+          $fullSha = git rev-parse HEAD 2>$null
+          if (-not $fullSha) { $fullSha = [System.Guid]::NewGuid().ToString() }
+          $bytes = [System.Text.Encoding]::UTF8.GetBytes($fullSha)
+          $md5 = [System.Security.Cryptography.MD5]::Create().ComputeHash($bytes)
+          $guidBytes = [byte[]]$md5[0..15]
+          $productGuid = [System.Guid]::new($guidBytes).ToString().ToUpper()
+
           echo "VERSION_MSI=$verMsi"         >> $env:GITHUB_OUTPUT
           echo "VERSION_DISPLAY=$verDisplay" >> $env:GITHUB_OUTPUT
+          echo "PRODUCT_GUID=$productGuid"   >> $env:GITHUB_OUTPUT
           Write-Host "Version MSI     : $verMsi"
           Write-Host "Version display : $verDisplay"
+          Write-Host "Product GUID    : $productGuid"
 
       # ----------------------------------------------------------------
       # 4. Install WiX v7, accept EULA and install WixUI extension
@@ -202,10 +213,13 @@ jobs:
           Write-Host " LicenseRtf : $licRtf"
           Write-Host " Output     : dist\$outputName"
 
+          $productGuid = "${{ steps.version.outputs.PRODUCT_GUID }}"
+
           wix build $wxs `
             -arch x64 `
             -d "Version=$version" `
             -d "ProductVersion=$verDisplay" `
+            -d "ProductCode=$productGuid" `
             -d "FilesDir=$filesDir" `
             -d "LicenseRtf=$licRtf" `
             -ext WixToolset.UI.wixext `

build-aux/windows/QElectroTech.wxs

@@ -16,6 +16,7 @@
     Name="QElectroTech"
     Manufacturer="QElectroTech Team"
     Version="$(var.Version)"
+    ProductCode="$(var.ProductCode)"
     UpgradeCode="A1B2C3D4-E5F6-7890-ABCD-EF1234567890"
     Language="1033"
     Codepage="1252"
@@ -28,6 +29,7 @@
     <!-- In-place upgrade: automatically uninstalls the previous version -->
     <MajorUpgrade
       DowngradeErrorMessage="A newer version of QElectroTech is already installed."
+      AllowSameVersionUpgrades="yes"
       Schedule="afterInstallInitialize" />
 
     <!-- Installation directory -->

sources/qetgraphicsitem/crossrefitem.cpp

@@ -25,6 +25,7 @@
 #include "element.h"
 #include "elementtextitemgroup.h"
 #include "qgraphicsitemutility.h"
+#include "terminal.h"
 
 //define the height of the header.
 static int header = 5;
@@ -627,6 +628,16 @@ void CrossRefItem::drawAsContacts(QPainter &painter)
 QRectF CrossRefItem::drawContact(QPainter &painter, int flags, Element *elmt)
 {
 	QString str = elementPositionText(elmt);
+
+	// Collect terminal names from the element definition (.elmt)
+	// e.g. name="13" and name="14" on each terminal
+	QStringList terminal_names;
+	for (Terminal *t : elmt->terminals()) {
+		const QString tname = t->name();
+		if (!tname.isEmpty())
+			terminal_names << tname;
+	}
+
 	int offset = m_drawed_contacts*10;
 	QRectF bounding_rect = QRectF(0, offset, 24, 10);
 	
@@ -643,15 +654,19 @@ QRectF CrossRefItem::drawContact(QPainter &painter, int flags, Element *elmt)
 		painter.drawLine(0, offset+6, 8, offset+6);
 		painter.drawLine(16, offset+6, 24, offset+6);
 
-		///take example of this code for display the terminal text
-		/*QFont font = QETApp::diagramTextsFont(4);
-		font.setBold(true);
-		painter.setFont(font);
-		QRectF bt(0, offset, 24, 10);
-		int txt = 10 + m_drawed_contacts;
-		painter.drawText(bt, Qt::AlignLeft|Qt::AlignTop, QString::number(txt));
-		painter.drawText(bt, Qt::AlignRight|Qt::AlignTop, QString::number(txt));
-		painter.setFont(QETApp::diagramTextsFont(5));*/
+		// Draw terminal names on each side of the contact symbol
+		// terminal_names[0] on the left, terminal_names[1] on the right
+		if (!terminal_names.isEmpty()) {
+			QFont font = QETApp::diagramTextsFont(4);
+			font.setBold(true);
+			painter.setFont(font);
+			QRectF bt(0, offset, 24, 10);
+			if (terminal_names.size() >= 1)
+				painter.drawText(bt, Qt::AlignLeft|Qt::AlignTop, terminal_names[0]);
+			if (terminal_names.size() >= 2)
+				painter.drawText(bt, Qt::AlignRight|Qt::AlignTop, terminal_names[1]);
+			painter.setFont(QETApp::diagramTextsFont(5));
+		}
 
 		//draw open contact
 		if (flags &NO) {
@@ -768,6 +783,28 @@ QRectF CrossRefItem::drawContact(QPainter &painter, int flags, Element *elmt)
 		};
 		painter.drawPolyline(p2, 3);
 
+		// Draw terminal names for switch contact (3 terminals)
+		// terminal_names[0] = NO side (top left)
+		// terminal_names[1] = NC side (bottom left)
+		// terminal_names[2] = common side (right)
+		if (!terminal_names.isEmpty()) {
+			QFont font = QETApp::diagramTextsFont(4);
+			font.setBold(true);
+			painter.setFont(font);
+			// Sort order from parseTerminal (top->bottom, left->right):
+			// [0]=12 (NO, top-left), [1]=14 (common, top-center), [2]=13 (NC, bottom-center)
+			if (terminal_names.size() >= 1)
+				painter.drawText(QRectF(0, offset, 8, 8),
+						Qt::AlignLeft|Qt::AlignTop, terminal_names[0]);   // 12 NO left
+			if (terminal_names.size() >= 2)
+				painter.drawText(QRectF(16, offset+4, 8, 6),
+						Qt::AlignRight|Qt::AlignTop, terminal_names[1]); // 14 common right
+			if (terminal_names.size() >= 3)
+				painter.drawText(QRectF(0, offset+9, 8, 6),
+						Qt::AlignLeft|Qt::AlignTop, terminal_names[2]); // 13 NC left-bottom
+			painter.setFont(QETApp::diagramTextsFont(5));
+		}
+
 			//Draw the half ellipse off delay
 		if (flags &Delay)
 		{