From 1c98dba72a4f7659dfd3f3b71aa8bcfe0ca50f7b Mon Sep 17 00:00:00 2001
From: denizdiktas <denizdiktas@gmail.com>
Date: Tue, 13 Jun 2023 16:23:40 +0300
Subject: [PATCH] small code refactor

---
 .../demo/earth/mainwidget.cpp                 | 32 +++++-----------
 .../demo/earth/mainwidget.h                   | 37 ++++++++++---------
 2 files changed, 29 insertions(+), 40 deletions(-)

diff --git a/Arrangement_on_surface_2/demo/earth/mainwidget.cpp b/Arrangement_on_surface_2/demo/earth/mainwidget.cpp
index 9b789e5f800..685234cfae4 100644
--- a/Arrangement_on_surface_2/demo/earth/mainwidget.cpp
+++ b/Arrangement_on_surface_2/demo/earth/mainwidget.cpp
@@ -1,5 +1,3 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #include "mainwidget.h"
 
@@ -17,18 +15,23 @@ MainWidget::~MainWidget()
   doneCurrent();
 }
 
-void MainWidget::mousePressEvent(QMouseEvent *e)
+
+void MainWidget::set_mouse_button_pressed_flag(QMouseEvent* e, bool flag)
 {
   switch (e->button())
   {
   case Qt::LeftButton:
-    m_left_mouse_button_down = true;
+    m_left_mouse_button_down = flag;
     break;
 
   case Qt::MiddleButton:
-    m_middle_mouse_button_down = true;
+    m_middle_mouse_button_down = flag;
     break;
   }
+}
+void MainWidget::mousePressEvent(QMouseEvent *e)
+{
+  set_mouse_button_pressed_flag(e, true);
   m_last_mouse_pos = QVector2D(e->position());
 }
 void MainWidget::mouseMoveEvent(QMouseEvent* e)
@@ -41,10 +44,9 @@ void MainWidget::mouseMoveEvent(QMouseEvent* e)
     const float rotation_scale_factor = 0.1f;
     const float theta_around_x = rotation_scale_factor * diff.y();
     const float theta_around_y = rotation_scale_factor * diff.x();
-  
     m_camera.rotate(theta_around_x, theta_around_y);
   }
-  else
+  else if(m_middle_mouse_button_down)
   {
     const float zoom_scale_factor = 0.01f;
     const auto distance = zoom_scale_factor * diff.y();
@@ -53,23 +55,9 @@ void MainWidget::mouseMoveEvent(QMouseEvent* e)
 
   m_last_mouse_pos = current_mouse_pos;
 }
-void MainWidget::wheelEvent(QWheelEvent* e)
-{
-  auto distance = e->angleDelta();
-  m_camera.move_forward(distance.x());
-}
 void MainWidget::mouseReleaseEvent(QMouseEvent *e)
 {
-  switch (e->button())
-  {
-  case Qt::LeftButton:
-    m_left_mouse_button_down = false;
-    break;
-
-  case Qt::MiddleButton:
-    m_middle_mouse_button_down = false;
-    break;
-  }
+  set_mouse_button_pressed_flag(e, false);
 }
 void MainWidget::timerEvent(QTimerEvent *)
 {
diff --git a/Arrangement_on_surface_2/demo/earth/mainwidget.h b/Arrangement_on_surface_2/demo/earth/mainwidget.h
index 86c3d7334b3..e29160be4cc 100644
--- a/Arrangement_on_surface_2/demo/earth/mainwidget.h
+++ b/Arrangement_on_surface_2/demo/earth/mainwidget.h
@@ -22,31 +22,32 @@
 
 class MainWidget : public QOpenGLWidget, protected OpenGLFunctionsBase
 {
-    Q_OBJECT
+  Q_OBJECT
 
 public:
-    using QOpenGLWidget::QOpenGLWidget;
-    ~MainWidget();
+  using QOpenGLWidget::QOpenGLWidget;
+  ~MainWidget();
 
 protected:
-    void mousePressEvent(QMouseEvent *e) override;
-    void mouseMoveEvent(QMouseEvent* e) override;
-    void wheelEvent(QWheelEvent* event) override;
-    void mouseReleaseEvent(QMouseEvent *e) override;
-    void timerEvent(QTimerEvent *e) override;
-
-    void initializeGL() override;
-    void resizeGL(int w, int h) override;
-    void paintGL() override;
+  void set_mouse_button_pressed_flag(QMouseEvent* e, bool flag);
+  void mousePressEvent(QMouseEvent *e) override;
+  void mouseMoveEvent(QMouseEvent* e) override;
+  void mouseReleaseEvent(QMouseEvent *e) override;
+  void timerEvent(QTimerEvent *e) override;
 
 
-    void add_shader(GLuint the_program, 
-                    const char* shader_code, 
-                    GLenum shader_type);
+  void initializeGL() override;
+  void resizeGL(int w, int h) override;
+  void paintGL() override;
+
+
+  void add_shader(GLuint the_program, 
+                  const char* shader_code, 
+                  GLenum shader_type);
     
-    void init_camera();
-    void init_geometry();
-    void init_shader_program();
+  void init_camera();
+  void init_geometry();
+  void init_shader_program();
 
 private:
   std::unique_ptr<Sphere>  m_sphere;