Selection rectangle moved into a separate class

src/slic3r/GUI/GLSelectionRectangle.hpp

@@ -0,0 +1,49 @@
+#ifndef slic3r_GLSelectionRectangle_hpp_
+#define slic3r_GLSelectionRectangle_hpp_
+
+#include "libslic3r/Point.hpp"
+
+namespace Slic3r {
+namespace GUI {
+    
+class Camera;
+
+class GLSelectionRectangle {
+public:
+    enum EState {
+            Off,
+            SlaSelect,
+            SlaDeselect
+        };
+
+    // Initiates the rectangle. Width and height describe canvas size.
+    void start_dragging(const Vec2d& mouse_position, float width, float height, EState status);
+
+    // To be called on mouse move.
+    void dragging(const Vec2d& mouse_position);
+
+    // Given a vector of points in world coordinates, the function returns indices of those
+    // that are in the rectangle. It then disables the rectangle.
+    std::vector<unsigned int> end_dragging(const Camera& camera, const std::vector<Vec3d>& points);
+
+    void render() const;
+        
+    bool is_active() const { return m_status != Off; }
+    EState get_status() const { return m_status; }
+    
+    
+
+private:
+    EState m_status = Off;
+    Vec2d m_start_corner;
+    Vec2d m_end_corner;
+    float m_width;
+    float m_height;
+};
+
+    
+} // namespace GUI
+} // namespace Slic3r
+
+
+#endif // slic3r_GLGizmoSlaSupports_hpp_