From 73ba96381e3c7fbaf45dec9ed624733ca1bf4c6e Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Mon, 13 Aug 2018 10:30:36 +0200
Subject: [PATCH] Drag&Drop test on Linux and OSX

---
 xs/src/slic3r/GUI/GUI_ObjectParts.cpp | 59 +++++++++++++++++++++++++++
 xs/src/slic3r/GUI/GUI_ObjectParts.hpp |  5 +++
 2 files changed, 64 insertions(+)

diff --git a/xs/src/slic3r/GUI/GUI_ObjectParts.cpp b/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
index bcd1846fb9..90fc615658 100644
--- a/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
+++ b/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
@@ -323,6 +323,9 @@ wxBoxSizer* content_objects_list(wxWindow *win)
     });
 #endif //__WXMSW__
 
+    m_objects_ctrl->Bind(wxEVT_DATAVIEW_ITEM_BEGIN_DRAG,    [](wxDataViewEvent& e) {on_begin_drag(e);});
+    m_objects_ctrl->Bind(wxEVT_DATAVIEW_ITEM_DROP_POSSIBLE, [](wxDataViewEvent& e) {on_drop_possible(e); });
+    m_objects_ctrl->Bind(wxEVT_DATAVIEW_ITEM_DROP,          [](wxDataViewEvent& e) {on_drop(e);});
 	return objects_sz;
 }
 
@@ -1528,5 +1531,61 @@ void update_rotation_value(const double angle, const std::string& axis)
     og->set_value("rotation_"+axis, deg);
 }
 
+void on_begin_drag(wxDataViewEvent &event)
+{
+    wxDataViewItem item(event.GetItem());
+
+    // only allow drags for item, not containers
+    if (m_objects_model->GetParent(item) == wxDataViewItem(0))
+    {
+        event.Veto();
+        return;
+    }
+
+    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    wxTextDataObject *obj = new wxTextDataObject;
+    obj->SetText(node->m_name);
+    event.SetDataObject(obj);
+    event.SetDragFlags(wxDrag_AllowMove); // allows both copy and move;
+}
+
+void on_drop_possible(wxDataViewEvent &event)
+{
+    wxDataViewItem item(event.GetItem());
+
+    // only allow drags for item or background, not containers
+    if (item.IsOk() && m_objects_model->GetParent(item) == wxDataViewItem(0))
+        event.Veto();
+
+    if (event.GetDataFormat() != wxDF_UNICODETEXT)
+        event.Veto();
+}
+
+void on_drop(wxDataViewEvent &event)
+{
+    wxDataViewItem item(event.GetItem());
+
+    // only allow drops for item, not containers
+    if (item.IsOk() && m_objects_model->GetParent(item) == wxDataViewItem(0))
+    {
+        event.Veto();
+        return;
+    }
+
+    if (event.GetDataFormat() != wxDF_UNICODETEXT)
+    {
+        event.Veto();
+        return;
+    }
+
+    wxTextDataObject obj;
+    obj.SetData(wxDF_UNICODETEXT, event.GetDataSize(), event.GetDataBuffer());
+
+    if (item.IsOk())
+        wxMessageBox(wxString::Format("Text dropped on item %s: %s", m_objects_model->GetName(item), obj.GetText()));
+    else
+        wxMessageBox(wxString::Format("Text dropped on background: %s", obj.GetText()));
+}
+
 } //namespace GUI
 } //namespace Slic3r 
\ No newline at end of file
diff --git a/xs/src/slic3r/GUI/GUI_ObjectParts.hpp b/xs/src/slic3r/GUI/GUI_ObjectParts.hpp
index 17c99f65c5..8c35bea35f 100644
--- a/xs/src/slic3r/GUI/GUI_ObjectParts.hpp
+++ b/xs/src/slic3r/GUI/GUI_ObjectParts.hpp
@@ -7,6 +7,7 @@ class wxBoxSizer;
 class wxString;
 class wxArrayString;
 class wxMenu;
+class wxDataViewEvent;
 
 namespace Slic3r {
 class ModelObject;
@@ -109,6 +110,10 @@ void update_rotation_values();
 // update rotation value after "gizmos"
 void update_rotation_value(const double angle, const std::string& axis);
 
+void on_begin_drag(wxDataViewEvent &event);
+void on_drop_possible(wxDataViewEvent &event);
+void on_drop(wxDataViewEvent &event);
+
 } //namespace GUI
 } //namespace Slic3r 
 #endif  //slic3r_GUI_ObjectParts_hpp_
\ No newline at end of file