/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */
 
// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage

/*
 * Conversion parameters:
 * inFile  = 
 * outPack = gtk
 * outFile = TreeModelIF
 * strct   = GtkTreeModel
 * realStrct=
 * ctorStrct=
 * clss    = TreeModelT
 * interf  = TreeModelIF
 * class Code: Yes
 * interface Code: Yes
 * template for:
 * extend  = 
 * implements:
 * prefixes:
 * 	- gtk_tree_model_
 * omit structs:
 * 	- GtkTreeIter
 * omit prefixes:
 * 	- gtk_tree_row_reference_
 * 	- gtk_tree_path_
 * 	- gtk_tree_iter_
 * omit code:
 * 	- gtk_tree_model_get_value
 * 	- gtk_tree_model_get_iter
 * omit signals:
 * imports:
 * 	- glib.Str
 * 	- gobject.Value
 * 	- gtk.TreeIter
 * 	- gtk.TreePath
 * structWrap:
 * 	- GValue* -> Value
 * 	- GtkTreeIter* -> TreeIter
 * 	- GtkTreePath* -> TreePath
 * module aliases:
 * local aliases:
 * overrides:
 */

module gtk.TreeModelIF;

public  import gtkc.gtktypes;

private import gtkc.gtk;
private import glib.ConstructionException;
private import gobject.ObjectG;

private import gobject.Signals;
public  import gtkc.gdktypes;
private import glib.Str;
private import gobject.Value;
private import gtk.TreeIter;
private import gtk.TreePath;



/**
 * The GtkTreeModel interface defines a generic tree interface for
 * use by the GtkTreeView widget. It is an abstract interface, and
 * is designed to be usable with any appropriate data structure. The
 * programmer just has to implement this interface on their own data
 * type for it to be viewable by a GtkTreeView widget.
 *
 * The model is represented as a hierarchical tree of strongly-typed,
 * columned data. In other words, the model can be seen as a tree where
 * every node has different values depending on which column is being
 * queried. The type of data found in a column is determined by using
 * the GType system (ie. G_TYPE_INT, GTK_TYPE_BUTTON, G_TYPE_POINTER,
 * etc). The types are homogeneous per column across all nodes. It is
 * important to note that this interface only provides a way of examining
 * a model and observing changes. The implementation of each individual
 * model decides how and if changes are made.
 *
 * In order to make life simpler for programmers who do not need to
 * write their own specialized model, two generic models are provided
 * — the GtkTreeStore and the GtkListStore. To use these, the
 * developer simply pushes data into these models as necessary. These
 * models provide the data structure as well as all appropriate tree
 * interfaces. As a result, implementing drag and drop, sorting, and
 * storing data is trivial. For the vast majority of trees and lists,
 * these two models are sufficient.
 *
 * Models are accessed on a node/column level of granularity. One can
 * query for the value of a model at a certain node and a certain
 * column on that node. There are two structures used to reference
 * a particular node in a model. They are the GtkTreePath and the
 * GtkTreeIter[4]. Most of the interface
 * consists of operations on a GtkTreeIter.
 *
 * A path is essentially a potential node. It is a location on a model
 * that may or may not actually correspond to a node on a specific
 * model. The GtkTreePath struct can be converted into either an
 * array of unsigned integers or a string. The string form is a list
 * of numbers separated by a colon. Each number refers to the offset
 * at that level. Thus, the path “0” refers to the root
 * node and the path “2:4” refers to the fifth child of
 * the third node.
 *
 * By contrast, a GtkTreeIter is a reference to a specific node on
 * a specific model. It is a generic struct with an integer and three
 * generic pointers. These are filled in by the model in a model-specific
 * way. One can convert a path to an iterator by calling
 * gtk_tree_model_get_iter(). These iterators are the primary way
 * of accessing a model and are similar to the iterators used by
 * GtkTextBuffer. They are generally statically allocated on the
 * stack and only used for a short time. The model interface defines
 * a set of operations using them for navigating the model.
 *
 * It is expected that models fill in the iterator with private data.
 * For example, the GtkListStore model, which is internally a simple
 * linked list, stores a list node in one of the pointers. The
 * GtkTreeModelSort stores an array and an offset in two of the
 * pointers. Additionally, there is an integer field. This field is
 * generally filled with a unique stamp per model. This stamp is for
 * catching errors resulting from using invalid iterators with a model.
 *
 * The lifecycle of an iterator can be a little confusing at first.
 * Iterators are expected to always be valid for as long as the model
 * is unchanged (and doesn't emit a signal). The model is considered
 * to own all outstanding iterators and nothing needs to be done to
 * free them from the user's point of view. Additionally, some models
 * guarantee that an iterator is valid for as long as the node it refers
 * to is valid (most notably the GtkTreeStore and GtkListStore).
 * Although generally uninteresting, as one always has to allow for
 * the case where iterators do not persist beyond a signal, some very
 * important performance enhancements were made in the sort model.
 * As a result, the GTK_TREE_MODEL_ITERS_PERSIST flag was added to
 * indicate this behavior.
 *
 * To help show some common operation of a model, some examples are
 * provided. The first example shows three ways of getting the iter at
 * the location “3:2:5”. While the first method shown is
 * easier, the second is much more common, as you often get paths from
 * callbacks.
 *
 * $(DDOC_COMMENT example)
 *
 * This second example shows a quick way of iterating through a list
 * and getting a string and an integer from each row. The
 * populate_model function used below is not
 * shown, as it is specific to the GtkListStore. For information on
 * how to write such a function, see the GtkListStore documentation.
 *
 * $(DDOC_COMMENT example)
 *
 * The GtkTreeModel interface contains two methods for reference
 * counting: gtk_tree_model_ref_node() and gtk_tree_model_unref_node().
 * These two methods are optional to implement. The reference counting
 * is meant as a way for views to let models know when nodes are being
 * displayed. GtkTreeView will take a reference on a node when it is
 * visible, which means the node is either in the toplevel or expanded.
 * Being displayed does not mean that the node is currently directly
 * visible to the user in the viewport. Based on this reference counting
 * scheme a caching model, for example, can decide whether or not to cache
 * a node based on the reference count. A file-system based model would
 * not want to keep the entire file hierarchy in memory, but just the
 * folders that are currently expanded in every current view.
 *
 * When working with reference counting, the following rules must be taken
 * into account:
 *
 * Never take a reference on a node without owning a
 * reference on its parent. This means that all parent nodes of a referenced
 * node must be referenced as well.
 *
 * Outstanding references on a deleted node are not released.
 * This is not possible because the node has already been deleted by the
 * time the row-deleted signal is received.
 *
 * Models are not obligated to emit a signal on rows of
 * which none of its siblings are referenced. To phrase this differently,
 * signals are only required for levels in which nodes are referenced. For
 * the root level however, signals must be emitted at all times (however the
 * root level is always referenced when any view is attached).
 */
public interface TreeModelIF
{
	
	
	/** Get the main Gtk struct */
	public GtkTreeModel* getTreeModelTStruct();
	
	/** the main Gtk struct as a void* */
	protected void* getStruct();
	
	
	/**
	 * Get the value of a column as a char array.
	 * this is the same calling getValue and get the string from the value object
	 */
	string getValueString(TreeIter iter, int column);
	
	/**
	 * Get the value of a column as a char array.
	 * this is the same calling getValue and get the int from the value object
	 */
	int getValueInt(TreeIter iter, int column);
	
	/**
	 * Sets iter to a valid iterator pointing to path.
	 * Params:
	 *  iter = The uninitialized GtkTreeIter.
	 *  path = The GtkTreePath.
	 * Returns:
	 *  TRUE, if iter was set.
	 */
	public int getIter(TreeIter iter, TreePath path);
	
	/**
	 * Initializes and sets value to that at column.
	 * When done with value, g_value_unset() needs to be called
	 * to free any allocated memory.
	 * Params:
	 * iter = The GtkTreeIter.
	 * column = The column to lookup the value at.
	 * value = (inout) (transfer none) An empty GValue to set.
	 */
	public Value getValue(TreeIter iter, int column, Value value = null);
	
	/**
	 */
	
	@property void delegate(TreePath, TreeIter, TreeModelIF)[] onRowChangedListeners();
	/**
	 * This signal is emitted when a row in the model has changed.
	 */
	void addOnRowChanged(void delegate(TreePath, TreeIter, TreeModelIF) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0);
	@property void delegate(TreePath, TreeModelIF)[] onRowDeletedListeners();
	/**
	 * This signal is emitted when a row has been deleted.
	 * Note that no iterator is passed to the signal handler,
	 * since the row is already deleted.
	 * This should be called by models after a row has been removed.
	 * The location pointed to by path should be the location that
	 * the row previously was at. It may not be a valid location anymore.
	 */
	void addOnRowDeleted(void delegate(TreePath, TreeModelIF) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0);
	@property void delegate(TreePath, TreeIter, TreeModelIF)[] onRowHasChildToggledListeners();
	/**
	 * This signal is emitted when a row has gotten the first child
	 * row or lost its last child row.
	 */
	void addOnRowHasChildToggled(void delegate(TreePath, TreeIter, TreeModelIF) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0);
	@property void delegate(TreePath, TreeIter, TreeModelIF)[] onRowInsertedListeners();
	/**
	 * This signal is emitted when a new row has been inserted in
	 * the model.
	 * Note that the row may still be empty at this point, since
	 * it is a common pattern to first insert an empty row, and
	 * then fill it with the desired values.
	 */
	void addOnRowInserted(void delegate(TreePath, TreeIter, TreeModelIF) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0);
	@property void delegate(TreePath, TreeIter, void*, TreeModelIF)[] onRowsReorderedListeners();
	/**
	 * This signal is emitted when the children of a node in the
	 * GtkTreeModel have been reordered.
	 * Note that this signal is not emitted
	 * when rows are reordered by DND, since this is implemented
	 * by removing and then reinserting the row.
	 * See Also
	 * GtkTreeView, GtkTreeStore, GtkListStore,
	 *  GtkTreeDnd,
	 *  GtkTreeSortable
	 * [4] Here, iter is short
	 * for “iterator”
	 */
	void addOnRowsReordered(void delegate(TreePath, TreeIter, void*, TreeModelIF) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0);
	
	/**
	 * Returns a set of flags supported by this interface.
	 * The flags are a bitwise combination of GtkTreeModelFlags.
	 * The flags supported should not change during the lifetime
	 * of the tree_model.
	 * Returns: the flags supported by this interface
	 */
	public GtkTreeModelFlags getFlags();
	
	/**
	 * Returns the number of columns supported by tree_model.
	 * Returns: the number of columns
	 */
	public int getNColumns();
	
	/**
	 * Returns the type of the column.
	 * Params:
	 * index = the column index
	 * Returns: the type of the column. [transfer none]
	 */
	public GType getColumnType(int index);
	
	/**
	 * Sets iter to a valid iterator pointing to path_string, if it
	 * exists. Otherwise, iter is left invalid and FALSE is returned.
	 * Params:
	 * iter = an uninitialized GtkTreeIter. [out]
	 * pathString = a string representation of a GtkTreePath
	 * Returns: TRUE, if iter was set
	 */
	public int getIterFromString(TreeIter iter, string pathString);
	
	/**
	 * Initializes iter with the first iterator in the tree
	 * (the one at the path "0") and returns TRUE. Returns
	 * FALSE if the tree is empty.
	 * Params:
	 * iter = the uninitialized GtkTreeIter. [out]
	 * Returns: TRUE, if iter was set
	 */
	public int getIterFirst(TreeIter iter);
	
	/**
	 * Returns a newly-created GtkTreePath referenced by iter.
	 * This path should be freed with gtk_tree_path_free().
	 * Params:
	 * iter = the GtkTreeIter
	 * Returns: a newly-created GtkTreePath
	 */
	public TreePath getPath(TreeIter iter);
	
	/**
	 * Sets iter to point to the node following it at the current level.
	 * If there is no next iter, FALSE is returned and iter is set
	 * to be invalid.
	 * Params:
	 * iter = the GtkTreeIter. [in]
	 * Returns: TRUE if iter has been changed to the next node
	 */
	public int iterNext(TreeIter iter);
	
	/**
	 * Sets iter to point to the previous node at the current level.
	 * If there is no previous iter, FALSE is returned and iter is
	 * set to be invalid.
	 * Params:
	 * iter = the GtkTreeIter. [in]
	 * Returns: TRUE if iter has been changed to the previous node Since 3.0
	 */
	public int iterPrevious(TreeIter iter);
	
	/**
	 * Sets iter to point to the first child of parent.
	 * If parent has no children, FALSE is returned and iter is
	 * set to be invalid. parent will remain a valid node after this
	 * function has been called.
	 * If parent is NULL returns the first node, equivalent to
	 * gtk_tree_model_get_iter_first (tree_model, iter);
	 * Params:
	 * iter = the new GtkTreeIter to be set to the child. [out]
	 * parent = the GtkTreeIter, or NULL. [allow-none]
	 * Returns: TRUE, if child has been set to the first child
	 */
	public int iterChildren(TreeIter iter, TreeIter parent);
	
	/**
	 * Returns TRUE if iter has children, FALSE otherwise.
	 * Params:
	 * iter = the GtkTreeIter to test for children
	 * Returns: TRUE if iter has children
	 */
	public int iterHasChild(TreeIter iter);
	
	/**
	 * Returns the number of children that iter has.
	 * As a special case, if iter is NULL, then the number
	 * of toplevel nodes is returned.
	 * Params:
	 * iter = the GtkTreeIter, or NULL. [allow-none]
	 * Returns: the number of children of iter
	 */
	public int iterNChildren(TreeIter iter);
	
	/**
	 * Sets iter to be the child of parent, using the given index.
	 * The first index is 0. If n is too big, or parent has no children,
	 * iter is set to an invalid iterator and FALSE is returned. parent
	 * will remain a valid node after this function has been called. As a
	 * special case, if parent is NULL, then the nth root node
	 * is set.
	 * Params:
	 * iter = the GtkTreeIter to set to the nth child. [out]
	 * parent = the GtkTreeIter to get the child from, or NULL. [allow-none]
	 * n = the index of the desired child
	 * Returns: TRUE, if parent has an nth child
	 */
	public int iterNthChild(TreeIter iter, TreeIter parent, int n);
	
	/**
	 * Sets iter to be the parent of child.
	 * If child is at the toplevel, and doesn't have a parent, then
	 * iter is set to an invalid iterator and FALSE is returned.
	 * child will remain a valid node after this function has been
	 * called.
	 * Params:
	 * iter = the new GtkTreeIter to set to the parent. [out]
	 * child = the GtkTreeIter
	 * Returns: TRUE, if iter is set to the parent of child
	 */
	public int iterParent(TreeIter iter, TreeIter child);
	
	/**
	 * Generates a string representation of the iter.
	 * This string is a ':' separated list of numbers.
	 * For example, "4:10:0:3" would be an acceptable
	 * return value for this string.
	 * Since 2.2
	 * Params:
	 * iter = a GtkTreeIter
	 * Returns: a newly-allocated string. Must be freed with g_free().
	 */
	public string getStringFromIter(TreeIter iter);
	
	/**
	 * Lets the tree ref the node.
	 * This is an optional method for models to implement.
	 * To be more specific, models may ignore this call as it exists
	 * primarily for performance reasons.
	 * This function is primarily meant as a way for views to let
	 * caching models know when nodes are being displayed (and hence,
	 * whether or not to cache that node). Being displayed means a node
	 * is in an expanded branch, regardless of whether the node is currently
	 * visible in the viewport. For example, a file-system based model
	 * would not want to keep the entire file-hierarchy in memory,
	 * just the sections that are currently being displayed by
	 * every current view.
	 * A model should be expected to be able to get an iter independent
	 * of its reffed state.
	 * Params:
	 * iter = the GtkTreeIter
	 */
	public void refNode(TreeIter iter);
	
	/**
	 * Lets the tree unref the node.
	 * This is an optional method for models to implement.
	 * To be more specific, models may ignore this call as it exists
	 * primarily for performance reasons. For more information on what
	 * this means, see gtk_tree_model_ref_node().
	 * Please note that nodes that are deleted are not unreffed.
	 * Params:
	 * iter = the GtkTreeIter
	 */
	public void unrefNode(TreeIter iter);
	
	/**
	 * See gtk_tree_model_get(), this version takes a va_list
	 * for language bindings to use.
	 * Params:
	 * iter = a row in tree_model
	 * varArgs = va_list of column/return location pairs
	 */
	public void getValist(TreeIter iter, void* varArgs);
	
	/**
	 * Calls func on each node in model in a depth-first fashion.
	 * If func returns TRUE, then the tree ceases to be walked,
	 * and gtk_tree_model_foreach() returns.
	 * Params:
	 * func = a function to be called on each row. [scope call]
	 * userData = user data to passed to func
	 */
	public void foreac(GtkTreeModelForeachFunc func, void* userData);
	
	/**
	 * Emits the "row-changed" signal on tree_model.
	 * Params:
	 * path = a GtkTreePath pointing to the changed row
	 * iter = a valid GtkTreeIter pointing to the changed row
	 */
	public void rowChanged(TreePath path, TreeIter iter);
	
	/**
	 * Emits the "row-inserted" signal on tree_model.
	 * Params:
	 * path = a GtkTreePath pointing to the inserted row
	 * iter = a valid GtkTreeIter pointing to the inserted row
	 */
	public void rowInserted(TreePath path, TreeIter iter);
	
	/**
	 * Emits the "row-has-child-toggled" signal on
	 * tree_model. This should be called by models after the child
	 * state of a node changes.
	 * Params:
	 * path = a GtkTreePath pointing to the changed row
	 * iter = a valid GtkTreeIter pointing to the changed row
	 */
	public void rowHasChildToggled(TreePath path, TreeIter iter);
	
	/**
	 * Emits the "row-deleted" signal on tree_model.
	 * This should be called by models after a row has been removed.
	 * The location pointed to by path should be the location that
	 * the row previously was at. It may not be a valid location anymore.
	 * Nodes that are deleted are not unreffed, this means that any
	 * outstanding references on the deleted node should not be released.
	 * Params:
	 * path = a GtkTreePath pointing to the previous location of
	 * the deleted row
	 */
	public void rowDeleted(TreePath path);
	
	/**
	 * Emits the "rows-reordered" signal on tree_model.
	 * This should be called by models when their rows have been
	 * reordered.
	 * Params:
	 * path = a GtkTreePath pointing to the tree node whose children
	 * have been reordered
	 * iter = a valid GtkTreeIter pointing to the node whose children
	 * have been reordered, or NULL if the depth of path is 0
	 * newOrder = an array of integers mapping the current position of
	 * each child to its old position before the re-ordering,
	 * i.e. new_order[newpos] = oldpos
	 * Signal Details
	 * The "row-changed" signal
	 * void user_function (GtkTreeModel *tree_model,
	 *  GtkTreePath *path,
	 *  GtkTreeIter *iter,
	 *  gpointer user_data) : Run Last
	 * This signal is emitted when a row in the model has changed.
	 * path = a GtkTreePath identifying the changed row
	 * iter = a valid GtkTreeIter pointing to the changed row
	 */
	public void rowsReordered(TreePath path, TreeIter iter, int[] newOrder);
}