Trying to engage support creation when the gizmo gets disabled.

src/slic3r/GUI/GLGizmo.cpp

@@ -11,6 +11,8 @@
 #include <igl/unproject_onto_mesh.h>
 #include <GL/glew.h>
 
+#include <SLA/SLASupportTree.hpp>
+
 #include <iostream>
 #include <numeric>
 
@@ -1599,6 +1601,29 @@ void GLGizmoSlaSupports::update_mesh()
     }
 }
 
+void GLGizmoSlaSupports::on_deactivate() {
+    if(!m_model_object) return;
+
+    sla::Controller supportctl;
+    std::cout << "Generating supports:" << std::endl;
+
+    // TODO: somehow get the global status indicator
+    supportctl.statuscb = [] (unsigned st, const std::string& msg) {
+        std::cout << st << "% "  << msg << std::endl;
+    };
+
+    const Model& model = *m_model_object->get_model();
+    auto emesh = sla::to_eigenmesh(model);
+    sla::PointSet input = sla::support_points(model);
+    sla::SupportConfig cfg;
+
+    sla::SLASupportTree stree(input, emesh, cfg, supportctl);
+
+    TriangleMesh output;
+    stree.merged_mesh(output);
+    m_model_object->add_volume(output);
+}
+
 Vec3f GLGizmoSlaSupports::unproject_on_mesh(const Vec2d& mouse_pos)
 {
     // if the gizmo doesn't have the V, F structures for igl, calculate them first:

src/slic3r/GUI/GLGizmo.hpp

@@ -78,7 +78,17 @@ public:
     void set_group_id(int id) { m_group_id = id; }
 
     EState get_state() const { return m_state; }
-    void set_state(EState state) { m_state = state; on_set_state(); }
+    void set_state(EState state) {
+        // FIXME: this is my workaround to react on the disabling event (Tamas)
+        bool call_deactivate = ((m_state == On || m_state == Hover) &&
+                                state == Off);
+
+        m_state = state; on_set_state();
+
+        if(call_deactivate) {
+            on_deactivate();
+        }
+    }
 
     bool is_activable(const GLCanvas3D::Selection& selection) const { return on_is_activable(selection); }
 
@@ -110,6 +120,7 @@ protected:
     virtual bool on_init() = 0;
     virtual std::string on_get_name() const = 0;
     virtual void on_set_state() {}
+    virtual void on_deactivate() {}     // FIXME: how to react to disabling the Gizmo? (Tamas)
     virtual void on_set_hover_id() {}
     virtual bool on_is_activable(const GLCanvas3D::Selection& selection) const { return true; }
     virtual void on_enable_grabber(unsigned int id) {}
@@ -415,9 +426,13 @@ private:
 
 protected:
     void on_set_state() override {
-        if (m_state == On && is_mesh_update_necessary())
+        if (m_state == On && is_mesh_update_necessary()) {
             update_mesh();
+        }
     }
+
+    void on_deactivate() override;
+
     std::string on_get_name() const override;
 };