1st installment of gizmos

xs/src/slic3r/GUI/GLGizmo.hpp

@@ -0,0 +1,78 @@
+#ifndef slic3r_GLGizmo_hpp_
+#define slic3r_GLGizmo_hpp_
+
+#include "../../slic3r/GUI/GLTexture.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+class GLGizmoBase
+{
+public:
+    enum EState
+    {
+        Off,
+        Hover,
+        On,
+        Num_States
+    };
+
+protected:
+    EState m_state;
+    // textures are assumed to be all the same size in pixels
+    // no internal check is done
+    GLTexture m_textures[Num_States];
+
+public:
+    GLGizmoBase();
+    virtual ~GLGizmoBase();
+
+    bool init();
+
+    EState get_state() const;
+
+    unsigned int get_textures_id() const;
+    int get_textures_height() const;
+    int get_textures_width() const;
+
+    virtual void render() const = 0;
+
+protected:
+    virtual bool on_init() = 0;
+};
+
+class GLGizmoRotate : public GLGizmoBase
+{
+    float m_angle_x;
+    float m_angle_y;
+    float m_angle_z;
+
+public:
+    GLGizmoRotate();
+
+    void render() const;
+
+protected:
+    virtual bool on_init();
+};
+
+class GLGizmoScale : public GLGizmoBase
+{
+    float m_scale_x;
+    float m_scale_y;
+    float m_scale_z;
+
+public:
+    GLGizmoScale();
+
+    void render() const;
+
+protected:
+    virtual bool on_init();
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLGizmo_hpp_
+