Paul Davis
ea6de825fa
git-svn-id: svn://localhost/ardour2/trunk@919 d708f5d6-7413-0410-9779-e7cbd77b26cf
128 lines
3.5 KiB
C++
128 lines
3.5 KiB
C++
#include <cstdio>
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#include <iostream>
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#include <gtkmm2ext/dndtreeview.h>
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using namespace std;
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using namespace sigc;
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using namespace Gdk;
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using namespace Gtk;
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using namespace Glib;
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using namespace Gtkmm2ext;
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DnDTreeView::DnDTreeView ()
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: TreeView ()
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{
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draggable.push_back (TargetEntry ("GTK_TREE_MODEL_ROW", TARGET_SAME_WIDGET));
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data_column = -1;
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enable_model_drag_source (draggable);
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enable_model_drag_dest (draggable);
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suggested_action = Gdk::DragAction (0);
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}
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void
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DnDTreeView::add_drop_targets (list<TargetEntry>& targets)
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{
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for (list<TargetEntry>::iterator i = targets.begin(); i != targets.end(); ++i) {
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draggable.push_back (*i);
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}
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enable_model_drag_source (draggable);
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enable_model_drag_dest (draggable);
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}
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void
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DnDTreeView::add_object_drag (int column, string type_name)
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{
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draggable.push_back (TargetEntry (type_name, TargetFlags(0)));
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data_column = column;
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enable_model_drag_source (draggable);
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enable_model_drag_dest (draggable);
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}
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DnDTreeView::SerializedObjectPointers*
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DnDTreeView::serialize_pointers (RefPtr<TreeModel> model, TreeSelection::ListHandle_Path* selection, ustring type)
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{
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uint32_t cnt = selection->size();
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uint32_t sz = (sizeof (void*) * cnt) + sizeof (SerializedObjectPointers);
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cerr << "lets plan to serialize " << cnt << " from selection\n";
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char* buf = new char[sz];
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SerializedObjectPointers* sr = new (buf) SerializedObjectPointers;
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sr->cnt = cnt;
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sr->size = sz;
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snprintf (sr->type, sizeof (sr->type), "%s", type.c_str());
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cnt = 0;
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for (TreeSelection::ListHandle_Path::iterator x = selection->begin(); x != selection->end(); ++x, ++cnt) {
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cerr << "getting next item\n";
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TreeModel::Row row = *(model->get_iter (*x));
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row.get_value (data_column, sr->ptr[cnt]);
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}
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cerr << "returning an SR with size = " << sr->size << endl;
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return sr;
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}
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void
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DnDTreeView::on_drag_data_get(const RefPtr<DragContext>& context, SelectionData& selection_data, guint info, guint time)
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{
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if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
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TreeView::on_drag_data_get (context, selection_data, info, time);
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} else if (data_column >= 0) {
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Gtk::TreeSelection::ListHandle_Path selection = get_selection()->get_selected_rows ();
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SerializedObjectPointers* sr = serialize_pointers (get_model(), &selection, selection_data.get_target());
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selection_data.set (8, (guchar*)sr, sr->size);
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cerr << "selection data set to contain " << sr->size << endl;
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}
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}
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void
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DnDTreeView::on_drag_data_received(const RefPtr<DragContext>& context, int x, int y, const SelectionData& selection_data, guint info, guint time)
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{
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if (suggested_action) {
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/* this is a drag motion callback. just update the status to
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say that we are still dragging, and that's it.
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*/
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suggested_action = Gdk::DragAction (0);
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TreeView::on_drag_data_received (context, x, y, selection_data, info, time);
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return;
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}
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if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
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TreeView::on_drag_data_received (context, x, y, selection_data, info, time);
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} else if (data_column >= 0) {
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/* object D-n-D */
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const SerializedObjectPointers* sr = reinterpret_cast<const SerializedObjectPointers *>(selection_data.get_data());
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if (sr) {
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signal_object_drop (sr->type, sr->cnt, const_cast<void**>(sr->ptr));
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}
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} else {
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/* some kind of target type added by the app, which will be handled by a signal handler */
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}
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}
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bool
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DnDTreeView::on_drag_drop(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, guint time)
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{
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suggested_action = Gdk::DragAction (0);
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return TreeView::on_drag_drop (context, x, y, time);
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}
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