Add galactic line of slight plot and galactic coords to Star Tracker

2026-08-17 00:43:50 -04:00 · 2021-06-25 13:00:59 +01:00
parent 40778f87ef
commit af21350b40
19 changed files with 675 additions and 246 deletions
@@ -0,0 +1,85 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2021 Jon Beniston, M7RCE                                        //
+//                                                                               //
+// This program 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 as version 3 of the License, or                  //
+// (at your option) any later version.                                           //
+//                                                                               //
+// This program 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 V3 for more details.                               //
+//                                                                               //
+// You should have received a copy of the GNU General Public License             //
+// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
+///////////////////////////////////////////////////////////////////////////////////
+
+#include <QMouseEvent>
+#include <QApplication>
+#include <QScrollBar>
+#include <qmath.h>
+
+#include "graphicsviewzoom.h"
+
+GraphicsViewZoom::GraphicsViewZoom(QGraphicsView* view) :
+    QObject(view),
+    m_view(view),
+    m_modifiers(Qt::NoModifier),
+    m_zoomFactorBase(1.0015)
+{
+    m_view->viewport()->installEventFilter(this);
+    m_view->setMouseTracking(true);
+}
+
+void GraphicsViewZoom::gentleZoom(double factor)
+{
+    m_view->scale(factor, factor);
+    m_view->centerOn(m_targetScenePos);
+    QPointF deltaViewportPos = m_targetViewportPos - QPointF(m_view->viewport()->width() / 2.0,
+                                                             m_view->viewport()->height() / 2.0);
+    QPointF viewportCenter = m_view->mapFromScene(m_targetScenePos) - deltaViewportPos;
+    m_view->centerOn(m_view->mapToScene(viewportCenter.toPoint()));
+    emit zoomed();
+}
+
+void GraphicsViewZoom::setModifiers(Qt::KeyboardModifiers modifiers)
+{
+    m_modifiers = modifiers;
+}
+
+void GraphicsViewZoom::setZoomFactorBase(double value)
+{
+    m_zoomFactorBase = value;
+}
+
+bool GraphicsViewZoom::eventFilter(QObject *object, QEvent *event)
+{
+    if (event->type() == QEvent::MouseMove)
+    {
+        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
+        QPointF delta = m_targetViewportPos - mouseEvent->pos();
+        if (qAbs(delta.x()) > 5 || qAbs(delta.y()) > 5)
+        {
+            m_targetViewportPos = mouseEvent->pos();
+            m_targetScenePos = m_view->mapToScene(mouseEvent->pos());
+        }
+    }
+    else if (event->type() == QEvent::Wheel)
+    {
+        QWheelEvent* wheelEvent = static_cast<QWheelEvent*>(event);
+        if (QApplication::keyboardModifiers() == m_modifiers)
+        {
+            if (wheelEvent->orientation() == Qt::Vertical)
+            {
+                double angle = wheelEvent->angleDelta().y();
+                double factor = qPow(m_zoomFactorBase, angle);
+                gentleZoom(factor);
+                return true;
+            }
+        }
+    }
+
+    Q_UNUSED(object)
+    return false;
+}