[TD]implement navigation styles

src/Mod/TechDraw/Gui/QGVNavStyleCAD.cpp

@@ -0,0 +1,150 @@
+/***************************************************************************
+ *   Copyright (c) 2022 Wanderer Fan <wandererfan@gmail.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 <QApplication>
+#include <QGuiApplication>
+#include <QMouseEvent>
+#endif
+
+#include "QGVPage.h"
+#include "QGVNavStyleCAD.h"
+
+using namespace TechDrawGui;
+
+namespace TechDrawGui {
+
+QGVNavStyleCAD::QGVNavStyleCAD()
+{
+}
+
+QGVNavStyleCAD::~QGVNavStyleCAD()
+{
+}
+
+void QGVNavStyleCAD::handleKeyReleaseEvent(QKeyEvent *event)
+{
+    //zoom mode 2
+    if ( ((event->key() == Qt::Key_Control) ||
+          (event->key() == Qt::Key_Shift)) && zoomingActive) {
+        zoomingActive = false;
+        event->accept();
+    }
+
+    //pan mode 2
+    if ((event->key() == Qt::Key_Control) && panningActive) {
+        stopPan();
+        event->accept();
+    }
+}
+
+void QGVNavStyleCAD::handleMousePressEvent(QMouseEvent *event)
+{
+    //pan mode 1 hold MMB + mouse movement
+    if (event->button() == Qt::MiddleButton) {
+        startClick(Qt::MiddleButton);   //for MMB center view
+        startPan(event->pos());
+        event->accept();
+    }
+
+    //zoom mode 2 Control + Shift + RMB click
+    if ((event->button() == Qt::RightButton) &&
+        QApplication::keyboardModifiers() == (Qt::ControlModifier | Qt::ShiftModifier)) {
+        startClick(Qt::RightButton);
+        event->accept();
+    }
+
+    //pan mode 2 Control + RMB click
+    if ((event->button() == Qt::RightButton) &&
+        QApplication::keyboardModifiers() == Qt::ControlModifier) {
+        startClick(Qt::RightButton);
+        event->accept();
+    }
+}
+
+void QGVNavStyleCAD::handleMouseMoveEvent(QMouseEvent *event)
+{
+    if (getViewer()->isBalloonPlacing()) {
+        getViewer()->setBalloonCursorPos(event->pos());
+    }
+
+    //if the mouse moves between press and release, then it isn't a click
+    if (m_clickPending) {
+        stopClick();
+        event->accept();
+        return;
+    }
+
+    if (panningActive) {
+        pan(event->pos());
+        event->accept();
+    }
+
+    if (zoomingActive) {
+        zoom(mouseZoomFactor(event->pos()));
+        event->accept();
+    }
+}
+
+void QGVNavStyleCAD::handleMouseReleaseEvent(QMouseEvent *event)
+{
+    if (getViewer()->isBalloonPlacing()) {
+        placeBalloon(event->pos());
+    }
+
+    if (event->button() == Qt::MiddleButton) {
+        if (m_clickPending && (m_clickButton == Qt::MiddleButton)) {
+            stopClick();
+            getViewer()->centerOn(getViewer()->mapToScene(event->pos()));
+            event->accept();
+        }
+        //pan mode 1 hold MMB + mouse move
+        if (panningActive) {
+            stopPan();
+            event->accept();
+        }
+    }
+
+    //zoom mode 2 Control + Shift + RMB click
+    if ((event->button() == Qt::RightButton) &&
+         QApplication::keyboardModifiers() == (Qt::ControlModifier | Qt::ShiftModifier) &&
+         m_clickPending) {
+        stopClick();
+        startZoom(event->pos());
+        event->accept();
+        return;
+    }
+
+    //pan mode 2 starts with Control + RMB click
+    if ((event->button() == Qt::RightButton) &&
+         QApplication::keyboardModifiers() == (Qt::ControlModifier) &&
+         m_clickPending) {
+        stopClick();
+        startPan(event->pos());
+        event->accept();
+    }
+
+
+}
+
+}  // namespace TechDrawGui