From d8efcf6da2c391c0b9bb2269f072e03e6f64ed07 Mon Sep 17 00:00:00 2001 From: Paul Davis Date: Mon, 24 Oct 2005 13:43:53 +0000 Subject: [PATCH] added files git-svn-id: svn://localhost/trunk/ardour2@67 d708f5d6-7413-0410-9779-e7cbd77b26cf --- libs/gtkmm2ext/dndtreeview.cc | 103 +++++++++++++++++++++++++ libs/gtkmm2ext/gtkmm2ext/dndtreeview.h | 67 ++++++++++++++++ 2 files changed, 170 insertions(+) create mode 100644 libs/gtkmm2ext/dndtreeview.cc create mode 100644 libs/gtkmm2ext/gtkmm2ext/dndtreeview.h diff --git a/libs/gtkmm2ext/dndtreeview.cc b/libs/gtkmm2ext/dndtreeview.cc new file mode 100644 index 0000000000..f230fc42b2 --- /dev/null +++ b/libs/gtkmm2ext/dndtreeview.cc @@ -0,0 +1,103 @@ +#include + +#include + +using namespace std; +using namespace sigc; +using namespace Gdk; +using namespace Gtk; +using namespace Glib; +using namespace Gtkmm2ext; + +DnDTreeView::DnDTreeView () + : TreeView () +{ + draggable.push_back (TargetEntry ("GTK_TREE_MODEL_ROW", TARGET_SAME_WIDGET)); + + enable_model_drag_source (draggable); + enable_model_drag_dest (draggable); + + suggested_action = Gdk::DragAction (0); +} + +void +DnDTreeView::add_object_drag (int column, string type_name) +{ + draggable.push_back (TargetEntry (type_name, TargetFlags(0))); + data_column = column; + + enable_model_drag_source (draggable); + enable_model_drag_dest (draggable); +} + +DnDTreeView::SerializedObjectPointers* +DnDTreeView::serialize_pointers (RefPtr model, TreeSelection::ListHandle_Path* selection, ustring type) +{ + uint32_t cnt = selection->size(); + uint32_t sz = (sizeof (void*) * cnt) + sizeof (SerializedObjectPointers); + + char* buf = new char[sz]; + SerializedObjectPointers* sr = new (buf) SerializedObjectPointers; + + sr->cnt = cnt; + sr->size = sz; + + snprintf (sr->type, sizeof (sr->type), "%s", type.c_str()); + + cnt = 0; + + for (TreeSelection::ListHandle_Path::iterator x = selection->begin(); x != selection->end(); ++x, ++cnt) { + TreeModel::Row row = *(model->get_iter (*x)); + row.get_value (data_column, sr->ptr[cnt]); + } + + return sr; +} + +void +DnDTreeView::on_drag_data_get(const RefPtr& context, SelectionData& selection_data, guint info, guint time) +{ + if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") { + + TreeView::on_drag_data_get (context, selection_data, info, time); + + } else { + + Gtk::TreeSelection::ListHandle_Path selection = get_selection()->get_selected_rows (); + SerializedObjectPointers* sr = serialize_pointers (get_model(), &selection, selection_data.get_target()); + selection_data.set (8, (guchar*)sr, sr->size); + + } +} + +void +DnDTreeView::on_drag_data_received(const RefPtr& context, int x, int y, const SelectionData& selection_data, guint info, guint time) +{ + if (suggested_action) { + /* this is a drag motion callback. just update the status to + say that we are still dragging, and that's it. + */ + suggested_action = Gdk::DragAction (0); + TreeView::on_drag_data_received (context, x, y, selection_data, info, time); + return; + } + + if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") { + + TreeView::on_drag_data_received (context, x, y, selection_data, info, time); + + } else { + /* object D-n-D */ + + const SerializedObjectPointers* sr = reinterpret_cast(selection_data.get_data()); + + if (sr) { + signal_object_drop (sr->type, sr->cnt, const_cast(sr->ptr)); + } + + context->drag_finish (true, false, time); + + } +} + + diff --git a/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h b/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h new file mode 100644 index 0000000000..1c91396987 --- /dev/null +++ b/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h @@ -0,0 +1,67 @@ +#ifndef __gtkmm2ext_dndtreeview_h__ +#define __gtkmm2ext_dndtreeview_h__ + +#include +#include +#include +#include +#include + +namespace Gtkmm2ext { + +class DnDTreeView : public Gtk::TreeView +{ + + private: + public: + DnDTreeView (); + ~DnDTreeView() {} + + void add_object_drag (int column, std::string type_name); + sigc::signal signal_object_drop; + + void on_drag_begin(const Glib::RefPtr& context) { + TreeView::on_drag_begin (context); + } + void on_drag_end(const Glib::RefPtr& context) { + TreeView::on_drag_end (context); + } + void on_drag_data_delete(const Glib::RefPtr& context) { + TreeView::on_drag_data_delete (context); + } + void on_drag_leave(const Glib::RefPtr& context, guint time) { + suggested_action = context->get_suggested_action(); + TreeView::on_drag_leave (context, time); + } + bool on_drag_motion(const Glib::RefPtr& context, int x, int y, guint time) { + suggested_action = context->get_suggested_action(); + return TreeView::on_drag_motion (context, x, y, time); + } + bool on_drag_drop(const Glib::RefPtr& context, int x, int y, guint time) { + suggested_action = Gdk::DragAction (0); + return TreeView::on_drag_drop (context, x, y, time); + } + + void on_drag_data_get(const Glib::RefPtr& context, Gtk::SelectionData& selection_data, guint info, guint time); + void on_drag_data_received(const Glib::RefPtr& context, int x, int y, const Gtk::SelectionData& selection_data, guint info, guint time); + + private: + std::list draggable; + Gdk::DragAction suggested_action; + int data_column; + + struct SerializedObjectPointers { + uint32_t size; + uint32_t cnt; + char type[32]; + void* ptr[0]; + }; + + SerializedObjectPointers* serialize_pointers (Glib::RefPtr m, + Gtk::TreeSelection::ListHandle_Path*, + Glib::ustring type); +}; + +} // namespace + +#endif /* __gtkmm2ext_dndtreeview_h__ */