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/*
Copyright (C) 2000-2007 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cstdio>
#include <iostream>
#include <gtkmm2ext/dndtreeview.h>
using namespace std;
using namespace sigc;
using namespace Gdk;
using namespace Gtk;
using namespace Glib;
using namespace Gtkmm2ext;
DnDTreeViewBase::DragData DnDTreeViewBase::drag_data;
DnDTreeViewBase::DnDTreeViewBase ()
: TreeView ()
, _drag_column (-1)
{
draggable.push_back (TargetEntry ("GTK_TREE_MODEL_ROW", TARGET_SAME_WIDGET));
data_column = -1;
enable_model_drag_source (draggable);
enable_model_drag_dest (draggable);
suggested_action = Gdk::DragAction (0);
}
void
DnDTreeViewBase::on_drag_begin (Glib::RefPtr<Gdk::DragContext> const & context) {
if (_drag_column >= 0) {
/* this code is a customized drop-in replacement for
* Gtk::TreeView::on_drag_begin().
* We can use it's cleanup function for the generated Pixmap
*/
TreeModel::Path path;
TreeViewColumn* column;
int cell_x;
int cell_y;
if (!get_path_at_pos ((int)press_start_x, (int)press_start_y, path, column, cell_x, cell_y)) {
return;
}
TreeIter iter = get_model()->get_iter (path);
int x_offset, y_offset, width, height;
Gdk::Rectangle unused;
TreeViewColumn* clm = get_column(_drag_column);
clm->cell_set_cell_data (get_model(), iter, false, false);
clm->cell_get_size (unused, x_offset, y_offset, width, height);
Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (get_root_window(), width, height);
CellRenderer* cell_renderer = clm->get_first_cell ();
Gdk::Rectangle cell_background (0, 0, width, height);
Gdk::Rectangle cell_size (x_offset, y_offset, width, height);
// the cell-renderer only clears the background if
// cell->cell_background_set and priv->cell_background
Gdk::Color clr = get_style()->get_bg(STATE_NORMAL);
// code dup from gtk_cell_renderer_render() to clear the background:
cairo_t *cr = gdk_cairo_create (Glib::unwrap(pixmap));
gdk_cairo_rectangle (cr, (cell_background).gobj());
gdk_cairo_set_source_color (cr, clr.gobj());
cairo_fill (cr);
cairo_destroy (cr);
// gtkmm wants a "window", gtk itself is happy with a "drawable",
// cell_renderer->render (pixmap, *this, cell_area, cell_area, cell_area, 0);
// We ain't got no window, so use gtk directly:
gtk_cell_renderer_render (cell_renderer->gobj(),
Glib::unwrap(pixmap), ((Gtk::Widget*)this)->gobj(),
(cell_background).gobj(),
(cell_size).gobj(),
(cell_size).gobj(),
((GtkCellRendererState)(0)));
context->set_icon (pixmap->get_colormap(),
pixmap, Glib::RefPtr<Gdk::Bitmap>(NULL),
width / 2 + 1, cell_y + 1);
} else {
Gtk::TreeView::on_drag_begin (context);
}
start_object_drag ();
}
void
DnDTreeViewBase::on_drag_end (Glib::RefPtr<Gdk::DragContext> const & context) {
Gtk::TreeView::on_drag_end (context);
end_object_drag ();
}
void
DnDTreeViewBase::add_drop_targets (list<TargetEntry>& targets)
{
for (list<TargetEntry>::iterator i = targets.begin(); i != targets.end(); ++i) {
draggable.push_back (*i);
}
enable_model_drag_source (draggable);
enable_model_drag_dest (draggable);
}
void
DnDTreeViewBase::add_object_drag (int column, string type_name)
{
draggable.push_back (TargetEntry (type_name, TargetFlags(0)));
data_column = column;
object_type = type_name;
enable_model_drag_source (draggable);
enable_model_drag_dest (draggable);
}
bool
DnDTreeViewBase::on_drag_drop(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, guint time)
{
suggested_action = Gdk::DragAction (0);
drag_data.source = 0;
return TreeView::on_drag_drop (context, x, y, time);
}
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