/*
- * This file is part of DisOrder
* Copyright (C) 2009 Richard Kettlewell
*
- * 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 3 of the License, or
- * (at your option) any later version.
+ * Note that this license ONLY applies to multidrag.c and multidrag.h, not to
+ * the rest of DisOrder.
*
- * 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, see <http://www.gnu.org/licenses/>.
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE
+ * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file disobedience/multidrag.c
* @brief Drag multiple rows of a GtkTreeView
int *where = g_object_get_data(G_OBJECT(w), "multidrag-where");
if(!where) {
where = g_malloc(2 * sizeof (int));
- g_object_set_data(G_OBJECT(w), "multidrag-where", where);
+ g_object_set_data_full(G_OBJECT(w), "multidrag-where", where,
+ g_free);
}
where[0] = x;
where[1] = y;
- // TODO release 'where' when object is destroyed
}
static gboolean multidrag_button_press_event(GtkWidget *w,
if(event->state & GDK_MODIFIER_MASK)
return FALSE;
/* We are only interested if a well-defined path is clicked */
- GtkTreePath *path;
+ GtkTreePath *path = NULL;
if(!gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(w),
event->x, event->y,
&path,
NULL,
NULL, NULL))
return FALSE;
- //gtk_widget_grab_focus(w); // TODO why??
/* We are only interested if a selected row is clicked */
GtkTreeSelection *s = gtk_tree_view_get_selection(GTK_TREE_VIEW(w));
- if(!gtk_tree_selection_path_is_selected(s, path))
- return FALSE;
- /* We block subsequent selection changes and remember where the
- * click was */
- block_selection(w, FALSE, event->x, event->y);
+ if(gtk_tree_selection_path_is_selected(s, path)) {
+ /* We block subsequent selection changes and remember where the
+ * click was */
+ block_selection(w, FALSE, event->x, event->y);
+ }
+ if(path)
+ gtk_tree_path_free(path);
return FALSE; /* propagate */
}
if(x == event->x && y == event->y) {
// If the up-click is at the same location as the down-click,
// it's not a drag.
- GtkTreePath *path;
+ GtkTreePath *path = NULL;
GtkTreeViewColumn *col;
if(gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(w),
event->x, event->y,
NULL, NULL)) {
gtk_tree_view_set_cursor(GTK_TREE_VIEW(w), path, col, FALSE);
}
+ if(path)
+ gtk_tree_path_free(path);
}
}
return FALSE; /* propagate */
/** @brief State for multidrag_begin() and its callbacks */
struct multidrag_begin_state {
GtkTreeView *view;
+ multidrag_row_predicate *predicate;
int rows;
int index;
GdkPixmap **pixmaps;
/** @brief Callback to construct a row pixmap */
static void multidrag_make_row_pixmaps(GtkTreeModel attribute((unused)) *model,
GtkTreePath *path,
- GtkTreeIter attribute((unused)) *iter,
+ GtkTreeIter *iter,
gpointer data) {
struct multidrag_begin_state *qdbs = data;
- qdbs->pixmaps[qdbs->index++]
- = gtk_tree_view_create_row_drag_icon(qdbs->view, path);
+ if(qdbs->predicate(path, iter)) {
+ qdbs->pixmaps[qdbs->index++]
+ = gtk_tree_view_create_row_drag_icon(qdbs->view, path);
+ }
}
/** @brief Called when a drag operation starts
* @param w Source widget (the tree view)
* @param dc Drag context
- * @param user_data Not used
+ * @param user_data Row predicate
*/
static void multidrag_drag_begin(GtkWidget *w,
GdkDragContext attribute((unused)) *dc,
- gpointer attribute((unused)) user_data) {
+ gpointer user_data) {
struct multidrag_begin_state qdbs[1];
GdkPixmap *icon;
GtkTreeSelection *sel;
//fprintf(stderr, "drag-begin\n");
memset(qdbs, 0, sizeof *qdbs);
qdbs->view = GTK_TREE_VIEW(w);
+ qdbs->predicate = (multidrag_row_predicate *)user_data;
sel = gtk_tree_view_get_selection(qdbs->view);
/* Find out how many rows there are */
if(!(qdbs->rows = gtk_tree_selection_count_selected_rows(sel)))
gtk_tree_selection_selected_foreach(sel,
multidrag_make_row_pixmaps,
qdbs);
+ /* Might not have used all rows */
+ qdbs->rows = qdbs->index;
/* Determine the size of the final icon */
int height = 0, width = 0;
for(int n = 0; n < qdbs->rows; ++n) {
NULL);
}
+static gboolean multidrag_default_predicate(GtkTreePath attribute((unused)) *path,
+ GtkTreeIter attribute((unused)) *iter) {
+ return TRUE;
+}
+
/** @brief Allow multi-row drag for @p w
* @param w A GtkTreeView widget
+ * @param predicate Function called to test rows for draggability, or NULL
+ *
+ * Suppresses the restriction of selections when a drag is started, and
+ * intercepts drag-begin to construct an icon.
*
- * Suppresses the restriction of selections when a drag is started.
+ * @p predicate should return TRUE for draggable rows and FALSE otherwise, to
+ * control what goes in the icon. If NULL, equivalent to a function that
+ * always returns TRUE.
*/
-void make_treeview_multidrag(GtkWidget *w) {
+void make_treeview_multidrag(GtkWidget *w,
+ multidrag_row_predicate *predicate) {
+ if(!predicate)
+ predicate = multidrag_default_predicate;
g_signal_connect(w, "button-press-event",
G_CALLBACK(multidrag_button_press_event), NULL);
g_signal_connect(w, "button-release-event",
G_CALLBACK(multidrag_button_release_event), NULL);
g_signal_connect(w, "drag-begin",
- G_CALLBACK(multidrag_drag_begin), NULL);
+ G_CALLBACK(multidrag_drag_begin), predicate);
}
/*
~mdw / disorder / blobdiff