Initial comit to use drag and drop

sources/TerminalStrip/ui/terminalstriptreewidget.cpp

@@ -0,0 +1,78 @@
+/*
+        Copyright 2006-2021 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 2 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/>.
+*/
+#include "terminalstriptreewidget.h"
+#include "../../qeticons.h"
+
+#include <QDebug>
+#include <QDrag>
+#include <QMimeData>
+#include <QDragMoveEvent>
+
+int TerminalStripTreeWidget::UUID_USER_ROLE = Qt::UserRole + 1;
+
+TerminalStripTreeWidget::TerminalStripTreeWidget(QWidget *parent) :
+    QTreeWidget(parent)
+{}
+
+QStringList TerminalStripTreeWidget::mimeTypes() const
+{
+	QStringList strl(QStringLiteral("application/x-qet-terminal-strip-tree-item"));
+
+	return strl;
+}
+
+void TerminalStripTreeWidget::startDrag(Qt::DropActions supportedActions)
+{
+	Q_UNUSED(supportedActions)
+
+	auto item = currentItem();
+
+	if (!item ||
+		item->type() != TerminalStripTreeWidget::FreeTerminal) {
+		return;
+	}
+
+	QDrag drag(this);
+	auto mime_data = new QMimeData();
+	mime_data->setData("application/x-qet-terminal-strip-tree-item", item->data(0, UUID_USER_ROLE).toString().toLatin1());
+
+	drag.setMimeData(mime_data);
+	drag.setPixmap(QET::Icons::ElementTerminal.pixmap(16,16));
+	drag.exec(Qt::MoveAction);
+}
+
+void TerminalStripTreeWidget::dragMoveEvent(QDragMoveEvent *event)
+{
+	QTreeWidget::dragMoveEvent(event);
+
+	auto item = itemAt(event->pos());
+
+	if (item &&
+		item->type() == TerminalStripTreeWidget::Strip) {
+		event->accept();
+	} else {
+		event->ignore();
+	}
+}
+
+void TerminalStripTreeWidget::dropEvent(QDropEvent *event)
+{}
+
+Qt::DropActions TerminalStripTreeWidget::supportedDropActions() const {
+	return Qt::MoveAction;
+}