diff options
Diffstat (limited to 'cut-n-paste-code/libegg/eggtreemultidnd.c')
| -rw-r--r-- | cut-n-paste-code/libegg/eggtreemultidnd.c | 417 |
1 files changed, 0 insertions, 417 deletions
diff --git a/cut-n-paste-code/libegg/eggtreemultidnd.c b/cut-n-paste-code/libegg/eggtreemultidnd.c deleted file mode 100644 index 062bb57e..00000000 --- a/cut-n-paste-code/libegg/eggtreemultidnd.c +++ /dev/null @@ -1,417 +0,0 @@ -/* eggtreemultidnd.c - * Copyright (C) 2001 Red Hat, Inc. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, - * Boston, MA 02110-1301, USA. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <string.h> -#include <gtk/gtk.h> -#include "eggtreemultidnd.h" - -#define EGG_TREE_MULTI_DND_STRING "EggTreeMultiDndString" - -typedef struct -{ - guint pressed_button; - gint x; - gint y; - guint motion_notify_handler; - guint button_release_handler; - guint drag_data_get_handler; - GSList *event_list; -} EggTreeMultiDndData; - -/* CUT-N-PASTE from gtktreeview.c */ -typedef struct _TreeViewDragInfo TreeViewDragInfo; -struct _TreeViewDragInfo -{ - GdkModifierType start_button_mask; - GtkTargetList *source_target_list; - GdkDragAction source_actions; - - GtkTargetList *dest_target_list; - - guint source_set : 1; - guint dest_set : 1; -}; - - -GType -egg_tree_multi_drag_source_get_type (void) -{ - static GType our_type = 0; - - if (!our_type) - { - const GTypeInfo our_info = - { - sizeof (EggTreeMultiDragSourceIface), /* class_size */ - NULL, /* base_init */ - NULL, /* base_finalize */ - NULL, - NULL, /* class_finalize */ - NULL, /* class_data */ - 0, - 0, /* n_preallocs */ - NULL - }; - - our_type = g_type_register_static (G_TYPE_INTERFACE, "EggTreeMultiDragSource", &our_info, 0); - } - - return our_type; -} - - -/** - * egg_tree_multi_drag_source_row_draggable: - * @drag_source: a #EggTreeMultiDragSource - * @path: row on which user is initiating a drag - * - * Asks the #EggTreeMultiDragSource whether a particular row can be used as - * the source of a DND operation. If the source doesn't implement - * this interface, the row is assumed draggable. - * - * Return value: %TRUE if the row can be dragged - **/ -gboolean -egg_tree_multi_drag_source_row_draggable (EggTreeMultiDragSource *drag_source, - GList *path_list) -{ - EggTreeMultiDragSourceIface *iface = EGG_TREE_MULTI_DRAG_SOURCE_GET_IFACE (drag_source); - - g_return_val_if_fail (EGG_IS_TREE_MULTI_DRAG_SOURCE (drag_source), FALSE); - g_return_val_if_fail (iface->row_draggable != NULL, FALSE); - g_return_val_if_fail (path_list != NULL, FALSE); - - if (iface->row_draggable) - return (* iface->row_draggable) (drag_source, path_list); - else - return TRUE; -} - - -/** - * egg_tree_multi_drag_source_drag_data_delete: - * @drag_source: a #EggTreeMultiDragSource - * @path: row that was being dragged - * - * Asks the #EggTreeMultiDragSource to delete the row at @path, because - * it was moved somewhere else via drag-and-drop. Returns %FALSE - * if the deletion fails because @path no longer exists, or for - * some model-specific reason. Should robustly handle a @path no - * longer found in the model! - * - * Return value: %TRUE if the row was successfully deleted - **/ -gboolean -egg_tree_multi_drag_source_drag_data_delete (EggTreeMultiDragSource *drag_source, - GList *path_list) -{ - EggTreeMultiDragSourceIface *iface = EGG_TREE_MULTI_DRAG_SOURCE_GET_IFACE (drag_source); - - g_return_val_if_fail (EGG_IS_TREE_MULTI_DRAG_SOURCE (drag_source), FALSE); - g_return_val_if_fail (iface->drag_data_delete != NULL, FALSE); - g_return_val_if_fail (path_list != NULL, FALSE); - - return (* iface->drag_data_delete) (drag_source, path_list); -} - -/** - * egg_tree_multi_drag_source_drag_data_get: - * @drag_source: a #EggTreeMultiDragSource - * @path: row that was dragged - * @selection_data: a #EggSelectionData to fill with data from the dragged row - * - * Asks the #EggTreeMultiDragSource to fill in @selection_data with a - * representation of the row at @path. @selection_data->target gives - * the required type of the data. Should robustly handle a @path no - * longer found in the model! - * - * Return value: %TRUE if data of the required type was provided - **/ -gboolean -egg_tree_multi_drag_source_drag_data_get (EggTreeMultiDragSource *drag_source, - GList *path_list, - GtkSelectionData *selection_data) -{ - EggTreeMultiDragSourceIface *iface = EGG_TREE_MULTI_DRAG_SOURCE_GET_IFACE (drag_source); - - g_return_val_if_fail (EGG_IS_TREE_MULTI_DRAG_SOURCE (drag_source), FALSE); - g_return_val_if_fail (iface->drag_data_get != NULL, FALSE); - g_return_val_if_fail (path_list != NULL, FALSE); - g_return_val_if_fail (selection_data != NULL, FALSE); - - return (* iface->drag_data_get) (drag_source, path_list, selection_data); -} - -static void -stop_drag_check (GtkWidget *widget) -{ - EggTreeMultiDndData *priv_data; - GSList *l; - - priv_data = g_object_get_data (G_OBJECT (widget), EGG_TREE_MULTI_DND_STRING); - - for (l = priv_data->event_list; l != NULL; l = l->next) - gdk_event_free (l->data); - - g_slist_free (priv_data->event_list); - priv_data->event_list = NULL; - g_signal_handler_disconnect (widget, priv_data->motion_notify_handler); - g_signal_handler_disconnect (widget, priv_data->button_release_handler); -} - -static gboolean -egg_tree_multi_drag_button_release_event (GtkWidget *widget, - GdkEventButton *event, - gpointer data) -{ - EggTreeMultiDndData *priv_data; - GSList *l; - - priv_data = g_object_get_data (G_OBJECT (widget), EGG_TREE_MULTI_DND_STRING); - - for (l = priv_data->event_list; l != NULL; l = l->next) - gtk_propagate_event (widget, l->data); - - stop_drag_check (widget); - - return FALSE; -} - -static void -selection_foreach (GtkTreeModel *model, - GtkTreePath *path, - GtkTreeIter *iter, - gpointer data) -{ - GList **list_ptr; - - list_ptr = (GList **) data; - - *list_ptr = g_list_prepend (*list_ptr, gtk_tree_row_reference_new (model, path)); -} - -static void -path_list_free (GList *path_list) -{ - g_list_foreach (path_list, (GFunc) gtk_tree_row_reference_free, NULL); - g_list_free (path_list); -} - -static void -set_context_data (GdkDragContext *context, - GList *path_list) -{ - g_object_set_data_full (G_OBJECT (context), - "egg-tree-view-multi-source-row", - path_list, - (GDestroyNotify) path_list_free); -} - -static GList * -get_context_data (GdkDragContext *context) -{ - return g_object_get_data (G_OBJECT (context), - "egg-tree-view-multi-source-row"); -} - -/* CUT-N-PASTE from gtktreeview.c */ -static TreeViewDragInfo* -get_info (GtkTreeView *tree_view) -{ - return g_object_get_data (G_OBJECT (tree_view), "gtk-tree-view-drag-info"); -} - - -static void -egg_tree_multi_drag_drag_data_get (GtkWidget *widget, - GdkDragContext *context, - GtkSelectionData *selection_data, - guint info, - guint time) -{ - GtkTreeView *tree_view; - GtkTreeModel *model; - TreeViewDragInfo *di; - GList *path_list; - - tree_view = GTK_TREE_VIEW (widget); - - model = gtk_tree_view_get_model (tree_view); - - if (model == NULL) - return; - - di = get_info (GTK_TREE_VIEW (widget)); - - if (di == NULL) - return; - - path_list = get_context_data (context); - - if (path_list == NULL) - return; - - /* We can implement the GTK_TREE_MODEL_ROW target generically for - * any model; for DragSource models there are some other targets - * we also support. - */ - - if (EGG_IS_TREE_MULTI_DRAG_SOURCE (model)) - { - egg_tree_multi_drag_source_drag_data_get (EGG_TREE_MULTI_DRAG_SOURCE (model), - path_list, - selection_data); - } -} - -static gboolean -egg_tree_multi_drag_motion_event (GtkWidget *widget, - GdkEventMotion *event, - gpointer data) -{ - EggTreeMultiDndData *priv_data; - - priv_data = g_object_get_data (G_OBJECT (widget), EGG_TREE_MULTI_DND_STRING); - - if (gtk_drag_check_threshold (widget, - priv_data->x, - priv_data->y, - event->x, - event->y)) - { - GList *path_list = NULL; - GtkTreeSelection *selection; - GtkTreeModel *model; - GdkDragContext *context; - TreeViewDragInfo *di; - - di = get_info (GTK_TREE_VIEW (widget)); - - if (di == NULL) - return FALSE; - - selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget)); - stop_drag_check (widget); - gtk_tree_selection_selected_foreach (selection, selection_foreach, &path_list); - path_list = g_list_reverse (path_list); - model = gtk_tree_view_get_model (GTK_TREE_VIEW (widget)); - if (egg_tree_multi_drag_source_row_draggable (EGG_TREE_MULTI_DRAG_SOURCE (model), path_list)) - { - - context = gtk_drag_begin_with_coordinates (widget, - gtk_drag_source_get_target_list (widget), - di->source_actions, - priv_data->pressed_button, - (GdkEvent*)event, - event->x, - event->y); - set_context_data (context, path_list); - gtk_drag_set_icon_default (context); - - } - else - { - path_list_free (path_list); - } - } - - return TRUE; -} - -static gboolean -egg_tree_multi_drag_button_press_event (GtkWidget *widget, - GdkEventButton *event, - gpointer data) -{ - GtkTreeView *tree_view; - GtkTreePath *path = NULL; - GtkTreeViewColumn *column = NULL; - gint cell_x, cell_y; - GtkTreeSelection *selection; - EggTreeMultiDndData *priv_data; - - tree_view = GTK_TREE_VIEW (widget); - priv_data = g_object_get_data (G_OBJECT (tree_view), EGG_TREE_MULTI_DND_STRING); - if (priv_data == NULL) - { - priv_data = g_new0 (EggTreeMultiDndData, 1); - g_object_set_data (G_OBJECT (tree_view), EGG_TREE_MULTI_DND_STRING, priv_data); - } - - if (g_slist_find (priv_data->event_list, event)) - return FALSE; - - if (priv_data->event_list) - { - /* save the event to be propagated in order */ - priv_data->event_list = g_slist_append (priv_data->event_list, gdk_event_copy ((GdkEvent*)event)); - return TRUE; - } - - if (event->type == GDK_2BUTTON_PRESS) - return FALSE; - - gtk_tree_view_get_path_at_pos (tree_view, - event->x, event->y, - &path, &column, - &cell_x, &cell_y); - - selection = gtk_tree_view_get_selection (tree_view); - - if (path && gtk_tree_selection_path_is_selected (selection, path)) - { - priv_data->pressed_button = event->button; - priv_data->x = event->x; - priv_data->y = event->y; - priv_data->event_list = g_slist_append (priv_data->event_list, gdk_event_copy ((GdkEvent*)event)); - priv_data->motion_notify_handler = - g_signal_connect (G_OBJECT (tree_view), "motion_notify_event", G_CALLBACK (egg_tree_multi_drag_motion_event), NULL); - priv_data->button_release_handler = - g_signal_connect (G_OBJECT (tree_view), "button_release_event", G_CALLBACK (egg_tree_multi_drag_button_release_event), NULL); - - if (priv_data->drag_data_get_handler == 0) - { - priv_data->drag_data_get_handler = - g_signal_connect (G_OBJECT (tree_view), "drag_data_get", G_CALLBACK (egg_tree_multi_drag_drag_data_get), NULL); - } - - gtk_tree_path_free (path); - - return TRUE; - } - - if (path) - { - gtk_tree_path_free (path); - } - - return FALSE; -} - -void -egg_tree_multi_drag_add_drag_support (GtkTreeView *tree_view) -{ - g_return_if_fail (GTK_IS_TREE_VIEW (tree_view)); - g_signal_connect (G_OBJECT (tree_view), "button_press_event", G_CALLBACK (egg_tree_multi_drag_button_press_event), NULL); -} - |