Reapply "Add cable management: drawing, cores, numbering, cross-references and cable list"

This reverts commit 2bb3343d2d.

sources/cablelist/cablequerywidget.h

@@ -0,0 +1,71 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef CABLEQUERYWIDGET_H
+#define CABLEQUERYWIDGET_H
+
+#include <QWidget>
+
+class ConfigSaveLoaderWidget;
+class QListWidget;
+class QListWidgetItem;
+class QPushButton;
+
+/**
+	@brief The CableQueryWidget class
+	The content tab of the dialog which puts a cable list on a sheet:
+	which columns the list shows, and in which order. Shaped after
+	SummaryQueryWidget -- two lists with arrows between them, a saved
+	configuration per name -- but the columns are chosen out of the
+	fixed set of CableList instead of out of a SQL query, so there is no
+	query line to edit.
+*/
+class CableQueryWidget : public QWidget
+{
+	Q_OBJECT
+
+	public:
+		explicit CableQueryWidget(QWidget *parent = nullptr);
+		~CableQueryWidget();
+
+		static QString modelIdentifier() {return "cable_list";}
+			/// The chosen columns, in order
+		QStringList selectedKeys() const;
+			/// Put exactly these columns in the right list, in that
+			/// order; keys this list does not know are ignored
+		void setFields(const QStringList &fields);
+
+	private slots:
+		void on_m_available_list_itemDoubleClicked(QListWidgetItem *item);
+		void on_m_choosen_list_itemDoubleClicked(QListWidgetItem *item);
+		void addField();
+		void removeField();
+		void moveFieldUp();
+		void moveFieldDown();
+		void saveConfig();
+		void loadConfig();
+
+	private:
+		void setUpItems();
+		void fillSavedQuery();
+
+		QListWidget *m_available_list = nullptr;
+		QListWidget *m_choosen_list = nullptr;
+		ConfigSaveLoaderWidget *m_config_gb = nullptr;
+};
+
+#endif // CABLEQUERYWIDGET_H