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Make node delete callback msg differentiate between deletes caused by user interaction and other deletes (e.g. treeview destruction).

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This commit is contained in:
Michael Drake 2013-07-15 14:34:56 +01:00
parent 9f72b5e046
commit ec9608c4de
2 changed files with 13 additions and 5 deletions
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15
desktop/treeview.c
View File

@ -576,6 +576,7 @@ static nserror treeview_walk_internal(treeview_node *root, bool full,
struct treeview_node_delete {
treeview *tree;
int height_reduction;
bool user_interaction;
};
/** Treewalk node callback deleting nodes. */
static nserror treeview_delete_node_walk_cb(treeview_node *n,
@ -584,6 +585,7 @@ static nserror treeview_delete_node_walk_cb(treeview_node *n,
struct treeview_node_delete *nd = (struct treeview_node_delete *)ctx;
struct treeview_node_msg msg;
msg.msg = TREE_MSG_NODE_DELETE;
msg.data.delete.user = nd->user_interaction;
assert(n->children == NULL);
@ -651,7 +653,8 @@ static nserror treeview_delete_node_internal(treeview *tree, treeview_node *n,
treeview_node *p = n->parent;
struct treeview_node_delete nd = {
.tree = tree,
.height_reduction = 0
.height_reduction = 0,
.user_interaction = interaction
};
if (interaction && (tree->flags & TREEVIEW_NO_DELETES)) {
@ -691,13 +694,14 @@ static nserror treeview_delete_node_internal(treeview *tree, treeview_node *n,
* Delete a treeview node
*
* \param tree Treeview object to delete empty nodes from
* \param interaction Delete is result of user interaction with treeview
* \return NSERROR_OK on success, appropriate error otherwise
*
* Note this must not be called within a treeview_walk. It may delete the
* walker's 'current' node, making it impossible to move on without invalid
* reads.
*/
static nserror treeview_delete_empty_nodes(treeview *tree)
static nserror treeview_delete_empty_nodes(treeview *tree, bool interaction)
{
treeview_node *node, *child, *parent, *next_sibling;
treeview_node *root = tree->root;
@ -705,7 +709,8 @@ static nserror treeview_delete_empty_nodes(treeview *tree)
nserror err;
struct treeview_node_delete nd = {
.tree = tree,
.height_reduction = 0
.height_reduction = 0,
.user_interaction = interaction
};
node = root;
@ -778,7 +783,7 @@ nserror treeview_delete_node(treeview *tree, treeview_node *n)
if (tree->flags & TREEVIEW_DEL_EMPTY_DIRS) {
/* Delete any empty nodes */
err = treeview_delete_empty_nodes(tree);
err = treeview_delete_empty_nodes(tree, false);
if (err != NSERROR_OK)
return err;
}
@ -1686,7 +1691,7 @@ bool treeview_keypress(treeview *tree, uint32_t key)
if (tree->flags & TREEVIEW_DEL_EMPTY_DIRS) {
/* Delete any empty nodes */
err = treeview_delete_empty_nodes(tree);
err = treeview_delete_empty_nodes(tree, true);
r.y0 = 0;
}
break;

3
desktop/treeview.h
View File

@ -59,6 +59,9 @@ enum treeview_msg {
struct treeview_node_msg {
enum treeview_msg msg; /**< The message type */
union {
struct {
bool user; /* True iff delete by user interaction */
} delete;
struct {
lwc_string *feild; /* The field being edited */
const char *text; /* The proposed new value */