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Add a pair of recursive expand/contract functions.

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This commit is contained in:
Michael Drake 2013-09-03 11:06:07 +01:00
parent 472108576e
commit b56d684a31
2 changed files with 97 additions and 3 deletions
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80
desktop/treeview.c
View File

@ -1338,8 +1338,7 @@ nserror treeview_destroy(treeview *tree)
/* Exported interface, documented in treeview.h */
nserror treeview_node_expand(treeview *tree,
treeview_node *node)
nserror treeview_node_expand(treeview *tree, treeview_node *node)
{
treeview_node *child;
struct treeview_node_entry *e;
@ -1423,6 +1422,7 @@ nserror treeview_node_expand(treeview *tree,
}
/** Treewalk node callback for handling node contraction. */
static nserror treeview_node_contract_cb(treeview_node *n, void *ctx,
bool *skip_children, bool *end)
@ -1482,6 +1482,82 @@ nserror treeview_node_contract(treeview *tree, treeview_node *node)
}
/* Exported interface, documented in treeview.h */
nserror treeview_contract(treeview *tree, bool all)
{
bool selected;
treeview_node *n;
assert(tree != NULL);
assert(tree->root != NULL);
for (n = tree->root->children; n != NULL; n = n->next_sib) {
if ((n->flags & TREE_NODE_EXPANDED) == false) {
continue;
}
if (n->type == TREE_NODE_FOLDER || all) {
selected = n->flags & TREE_NODE_SELECTED;
/* Contract children. */
treeview_walk_internal(n, false, NULL,
treeview_node_contract_cb, NULL);
/* Contract node */
treeview_node_contract_cb(n, NULL, false, false);
if (selected)
n->flags |= TREE_NODE_SELECTED;
}
}
/* Inform front end of change in dimensions */
tree->cw_t->update_size(tree->cw_h, -1, tree->root->height);
return NSERROR_OK;
}
struct treeview_contract_data {
treeview *tree;
bool only_folders;
};
/** Treewalk node callback for handling recursive node expansion. */
static nserror treeview_expand_cb(treeview_node *n, void *ctx,
bool *skip_children, bool *end)
{
struct treeview_contract_data *data = ctx;
nserror err;
assert(n != NULL);
assert(n->type != TREE_NODE_ROOT);
if (n->flags & TREE_NODE_EXPANDED ||
(data->only_folders && n->type != TREE_NODE_FOLDER)) {
/* Nothing to do. */
return NSERROR_OK;
}
err = treeview_node_expand(data->tree, n);
return err;
}
/* Exported interface, documented in treeview.h */
nserror treeview_expand(treeview *tree, bool only_folders)
{
struct treeview_contract_data data;
assert(tree != NULL);
assert(tree->root != NULL);
data.tree = tree;
data.only_folders = only_folders;
return treeview_walk_internal(tree->root, true, NULL,
treeview_expand_cb, &data);
}
/* Exported interface, documented in treeview.h */
void treeview_redraw(treeview *tree, int x, int y, struct rect *clip,
const struct redraw_context *ctx)

20
desktop/treeview.h
View File

@ -301,7 +301,7 @@ nserror treeview_delete_node(treeview *tree, treeview_node *n,
/**
* Expand a treeview node
*
* \param tree Treeview object to expande node in
* \param tree Treeview object to expand node in
* \param node Node to expand
* \return NSERROR_OK on success, appropriate error otherwise
*/
@ -316,6 +316,24 @@ nserror treeview_node_expand(treeview *tree, treeview_node *node);
*/
nserror treeview_node_contract(treeview *tree, treeview_node *node);
/**
* Expand a treeview's nodes
*
* \param tree Treeview object to expand nodes in
* \param only_folders Iff true, only folders are expanded.
* \return NSERROR_OK on success, appropriate error otherwise
*/
nserror treeview_expand(treeview *tree, bool only_folders);
/**
* Contract a treeview's nodes
*
* \param tree Treeview object to contract nodes in
* \param all Iff false, only entries are contracted.
* \return NSERROR_OK on success, appropriate error otherwise
*/
nserror treeview_contract(treeview *tree, bool all);
/**
* Redraw a treeview object
*