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