TechDraw: Implement smart dimension tool.

src/Mod/TechDraw/Gui/TechDrawHandler.cpp

@@ -0,0 +1,107 @@
+/***************************************************************************
+ *   Copyright (c) 2024 Pierre-Louis Boyer <development@ondsel.com>        *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  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 Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "PreCompiled.h"
+#ifndef _PreComp_
+#include <cmath>
+
+#include <QGuiApplication>
+#include <QPainter>
+
+#include <Inventor/events/SoKeyboardEvent.h>
+#endif  // #ifndef _PreComp_
+
+#include <Base/Console.h>
+#include <Base/Exception.h>
+#include <Gui/Application.h>
+#include <Gui/CommandT.h>
+#include <Gui/MainWindow.h>
+#include <Gui/View3DInventor.h>
+#include <Gui/View3DInventorViewer.h>
+
+#include "MDIViewPage.h"
+#include "QGVPage.h"
+#include "TechDrawHandler.h"
+
+
+using namespace TechDrawGui;
+
+/**************************** TechDrawHandler *******************************************/
+
+TechDrawHandler::TechDrawHandler() : Gui::ToolHandler(), viewPage(nullptr)
+{}
+
+TechDrawHandler::~TechDrawHandler()
+{}
+
+void TechDrawHandler::activate(QGVPage* vp)
+{
+    viewPage = vp;
+
+    if (!Gui::ToolHandler::activate()) {
+        viewPage->deactivateHandler();
+    }
+}
+
+void TechDrawHandler::keyReleaseEvent(QKeyEvent* event)
+{
+    // the default behaviour is to quit - specific handler categories may
+    // override this behaviour, for example to implement a continuous mode
+    if (event->key() == Qt::Key_Escape) {
+        quit();
+        event->accept();
+    }
+}
+
+bool TechDrawHandler::mousePressEvent(QMouseEvent* event)
+{
+    // the default behaviour is to quit - specific handler categories may
+    // override this behaviour, for example to implement a continuous mode
+    if (event->button() == Qt::RightButton) {
+        quit();
+        event->accept();
+    }
+    return true;
+}
+
+void TechDrawHandler::quit()
+{
+    viewPage->deactivateHandler();
+}
+
+QWidget* TechDrawHandler::getCursorWidget()
+{
+    return viewPage;
+}
+
+void TechDrawHandler::setWidgetCursor(QCursor cursor)
+{
+    if (viewPage) {
+        viewPage->setCursor(cursor);
+        viewPage->viewport()->setCursor(cursor);
+    }
+}
+
+TechDraw::DrawPage* TechDrawHandler::getPage()
+{
+    return viewPage->getDrawPage();
+}