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#include <gtk/gtk.h>
typedef GtkListStore MyModel;
typedef GtkListStoreClass MyModelClass;
static void my_model_drag_source_init (GtkTreeDragSourceIface *iface);
G_DEFINE_TYPE_WITH_CODE (MyModel, my_model, GTK_TYPE_LIST_STORE,
G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_SOURCE,
my_model_drag_source_init))
static void
my_model_class_init (MyModelClass *class)
{
}
static void
my_model_init (MyModel *object)
{
GType types[1] = { G_TYPE_STRING };
gtk_list_store_set_column_types (GTK_LIST_STORE (object), G_N_ELEMENTS (types), types);
}
static gboolean
my_model_drag_data_get (GtkTreeDragSource *source,
GtkTreePath *path,
GtkSelectionData *data)
{
GtkTreeIter iter;
gchar *text;
gtk_tree_model_get_iter (GTK_TREE_MODEL (source), &iter, path);
gtk_tree_model_get (GTK_TREE_MODEL (source), &iter, 0, &text, -1);
gtk_selection_data_set_text (data, text, -1);
g_free (text);
return TRUE;
}
static void
my_model_drag_source_init (GtkTreeDragSourceIface *iface)
{
static GtkTreeDragSourceIface *parent;
parent = g_type_interface_peek_parent (iface);
iface->row_draggable = parent->row_draggable;
iface->drag_data_delete = parent->drag_data_delete;
iface->drag_data_get = my_model_drag_data_get;
}
static GtkTreeModel *
get_model (void)
{
MyModel *model;
model = g_object_new (my_model_get_type (), NULL);
gtk_list_store_insert_with_values (GTK_LIST_STORE (model), NULL, -1, 0, "Item 1", -1);
gtk_list_store_insert_with_values (GTK_LIST_STORE (model), NULL, -1, 0, "Item 2", -1);
gtk_list_store_insert_with_values (GTK_LIST_STORE (model), NULL, -1, 0, "Item 3", -1);
return GTK_TREE_MODEL (model);
}
static const char *entries[] = {
"text/plain"
};
static GtkWidget *
get_dragsource (void)
{
GtkTreeView *tv;
GtkCellRenderer *renderer;
GtkTreeViewColumn *column;
GdkContentFormats *targets;
tv = (GtkTreeView*) gtk_tree_view_new ();
renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes ("Text", renderer, "text", 0, NULL);
gtk_tree_view_append_column (tv, column);
gtk_tree_view_set_model (tv, get_model ());
targets = gdk_content_formats_new (entries, G_N_ELEMENTS (entries));
gtk_tree_view_enable_model_drag_source (tv, GDK_BUTTON1_MASK, targets, GDK_ACTION_COPY);
gdk_content_formats_unref (targets);
return GTK_WIDGET (tv);
}
static void
got_text (GObject *source,
GAsyncResult *result,
gpointer data)
{
GtkDropTarget *dest = GTK_DROP_TARGET (source);
GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
gchar *text;
GtkSelectionData *selda;
selda = gtk_drop_target_read_selection_finish (dest, result, NULL);
text = (gchar*) gtk_selection_data_get_text (selda);
gtk_label_set_label (GTK_LABEL (widget), text);
g_free (text);
gtk_selection_data_free (selda);
}
static void
drag_drop (GtkDropTarget *dest,
GdkDrop *drop,
int x,
int y,
gpointer dada)
{
gtk_drop_target_read_selection (dest, "text/plain", NULL, got_text, dada);
}
static GtkWidget *
get_droptarget (void)
{
GtkWidget *label;
GdkContentFormats *targets;
GtkDropTarget *dest;
label = gtk_label_new ("Drop here");
targets = gdk_content_formats_new (entries, G_N_ELEMENTS (entries));
dest = gtk_drop_target_new (targets, GDK_ACTION_COPY);
g_signal_connect (dest, "drag-drop", G_CALLBACK (drag_drop), NULL);
gtk_widget_add_controller (label, GTK_EVENT_CONTROLLER (dest));
gdk_content_formats_unref (targets);
return label;
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *box;
gtk_init ();
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_container_add (GTK_CONTAINER (window), box);
gtk_container_add (GTK_CONTAINER (box), get_dragsource ());
gtk_container_add (GTK_CONTAINER (box), get_droptarget ());
gtk_widget_show (window);
while (TRUE)
g_main_context_iteration (NULL, TRUE);
return 0;
}
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