/*
 * 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 = TreeIter
 * strct   = GtkTreeIter
 * realStrct=
 * ctorStrct=
 * clss    = TreeIter
 * interf  = 
 * class Code: Yes
 * interface Code: No
 * template for:
 * extend  = 
 * implements:
 * prefixes:
 * 	- gtk_tree_iter_
 * omit structs:
 * omit prefixes:
 * omit code:
 * 	- gtk_tree_iter_copy
 * 	- gtk_tree_iter_free
 * omit signals:
 * 	- row-changed
 * 	- row-deleted
 * 	- row-has-child-toggled
 * 	- row-inserted
 * 	- rows-reordered
 * imports:
 * 	- glib.Str
 * 	- gobject.Value
 * 	- gtk.TreeIterError
 * 	- gtk.TreeModelIF
 * 	- gtk.TreePath
 * structWrap:
 * 	- GtkTreeIter* -> TreeIter
 * module aliases:
 * local aliases:
 * overrides:
 */

module gtk.TreeIter;

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.TreeIterError;
private import gtk.TreeModelIF;
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 class TreeIter
{
	
	/** the main Gtk struct */
	protected GtkTreeIter* gtkTreeIter;
	
	
	/** Get the main Gtk struct */
	public GtkTreeIter* getTreeIterStruct()
	{
		return gtkTreeIter;
	}
	
	
	/** the main Gtk struct as a void* */
	protected void* getStruct()
	{
		return cast(void*)gtkTreeIter;
	}
	
	/**
	 * Sets our main struct and passes it to the parent class
	 */
	public this (GtkTreeIter* gtkTreeIter)
	{
		this.gtkTreeIter = gtkTreeIter;
	}
	
	/**
	 * this will be set only when the iter
	 * is created from the model.
	 */
	GtkTreeModel* gtkTreeModel;
	
	/** */
	public void setModel(GtkTreeModel* gtkTreeModel)
	{
		this.gtkTreeModel = gtkTreeModel;
	}
	
	/** */
	public void setModel(TreeModelIF treeModel)
	{
		this.gtkTreeModel = treeModel.getTreeModelTStruct();
	}
	
	/**
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(TreeModelIF treeModel, string treePath)
	{
		this(treeModel, new TreePath(treePath));
	}
	
	/**
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(TreeModelIF treeModel, TreePath treePath)
	{
		this();
		setModel(treeModel);
		if ( !gtk_tree_model_get_iter_from_string(
		treeModel.getTreeModelTStruct(),
		getTreeIterStruct(), Str.toStringz(treePath.toString())) )
		{
			throw new ConstructionException("null returned by gtk_tree_model_get_iter_from_string");
		}
	}
	
	/**
	 * creates a new tree iteractor.
	 * used TreeView.createIter and TreeView.append() to create iteractor for a tree or list
	 */
	this()
	{
		this(new GtkTreeIter);
	}
	
	/**
	 * Creates a dynamically allocated tree iterator as a copy of iter.
	 */
	TreeIter copy(TreeIter iter)
	{
		TreeIter cp = new TreeIter();
		 *(cp.gtkTreeIter) = *(iter.gtkTreeIter);
		
		return cp;
	}
	
	/**
	 * Get Value
	 * Params:
	 *  column =
	 *  value =
	 */
	void getValue(int column, Value value)
	{
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getValue","Tree model not set");
		}
		gtk_tree_model_get_value(gtkTreeModel, gtkTreeIter, column, value.getValueStruct());
	}
	
	/**
	 * Get the value of a column as a string
	 * Params:
	 *  column = the column number
	 * Returns: a string representing the value of the column
	 */
	string getValueString(int column)
	{
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getValueString","Tree model not set");
		}
		Value value = new Value();
		gtk_tree_model_get_value(gtkTreeModel, gtkTreeIter, column, value.getValueStruct());
		//printf("TreeIter.getValuaString = %.*s\n", value.getString().toString());
		return value.getString();
	}
	
	/**
	 * Get the value of a column as an int
	 * Params:
	 *  column = the column number
	 * Returns: a string representing the value of the column
	 */
	int getValueInt(int column)
	{
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getValueInt", "Tree model not set");
		}
		Value value = new Value();
		gtk_tree_model_get_value(gtkTreeModel, gtkTreeIter, column, value.getValueStruct());
		return value.getInt();
	}
	
	/** */
	TreePath getTreePath()
	{
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getTreePath","Tree model not set");
		}
		return new TreePath(gtk_tree_model_get_path(gtkTreeModel, gtkTreeIter));
	}
	
	/**
	 * This return the path visible to the user.
	 */
	string getVisiblePath(string separator)
	{
		string vPath;
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getVisiblePath", "Tree model not set");
		}
		
		vPath = getValueString(0);
		TreeIter parent = getParent();
		while ( parent !is  null )
		{
			//printf("TreeIter.getVisiblePath parent = %.*s\n",parent.getValueString(0).toString());
			vPath = parent.getValueString(0) ~ separator ~ vPath;
			parent = parent.getParent();
		}
		
		//printf("TreeIter.getVisiblePath = %.*s\n", vPath.toString());
		
		return vPath;
	}
	
	/**
	 * Gets the parent of this iter
	 * Returns: the parent iter or null if can't get parent or an error occured
	 */
	TreeIter getParent()
	{
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getParent", "Tree model not set");
		}
		TreeIter parent = new TreeIter();
		bool gotParent = gtk_tree_model_iter_parent(gtkTreeModel, parent.getTreeIterStruct(), gtkTreeIter) == 0 ? false : true;
		if ( !gotParent )
		{
			return null;
		}
		parent.setModel(gtkTreeModel);
		return parent;
	}
	
	/** */
	TreeIter getGrandParent()
	{
		if ( gtkTreeModel  is  null )
		{
			throw new TreeIterError("getGrandParent", "Tree model not set");
		}
		TreeIter grandParent = this;
		TreeIter parent = grandParent.getParent();
		while ( parent !is null )
		{
			grandParent = parent;
			parent = grandParent.getParent();
		}
		
		return grandParent;
	}
	
	/** A unique stamp to catch invalid iterators */
	public int stamp()
	{
		return gtkTreeIter.stamp;
	}
	
	/** Ditto */
	public void stamp(int stamp)
	{
		gtkTreeIter.stamp = stamp;
	}
	
	/** Model specific data */
	public void* userData()
	{
		return gtkTreeIter.userData;
	}
	
	/** Ditto */
	public void userData(void* data)
	{
		gtkTreeIter.userData = data;
	}
	
	public struct IterData
	{
		/// Data fields.
		union
		{
			int     dataInt;
			long    dataLong;
			double  dataFloat;
			double  dataDouble;
			string  dataString;
			
			void*   dataUser;
		}
		
		TypeInfo type = typeid(void);
	}
	
	/**
	 * setUserData and getUserData provide simple boxing
	 * around the userData field in the TreeIter struct.
	 * Throws: TreeIterError for unsuported types or a type mismatch.
	 * Example:
	 * ---
	 * Treeiter iter = new TreeIter();
	 *
	 * iter.setUserData(20);
	 * int i = iter.getUserData!(int)();
	 * ---
	 */
	public void setUserData(T)(T data)
	{
		IterData* itData = new IterData;
		itData.type = typeid(T);
		
		static if(is(T == int))
		{
			itData.dataInt = data;
		}
		else static if(is(T == long))
		{
			itData.dataLong = data;
		}
		else static if(is(T == float))
		{
			itData.dataFloat = data;
		}
		else static if(is(T == double))
		{
			itData.dataDouble = data;
		}
		else static if(is(T == string))
		{
			itData.dataString = data;
		}
		else static if(is(T == void*))
		{
			itData.dataUser = data;
		}
		else
		{
			pragma(msg, "IterData Type not Suported");
			
			throw new TreeIterError("getUserData", "IterData Type not Suported");
		}
		
		gtkTreeIter.userData = itData;
	}
	
	/** Ditto */
	public T getUserData(T)()
	{
		IterData* itData = cast(IterData*)gtkTreeIter.userData;
		
		static if(is(T == int))
		{
			if(itData.type is typeid(T))
			{
				return itData.dataInt;
			}
			else
			{
				throw new TreeIterError("getUserData", "IterData is not: int");
			}
		}
		else static if(is(T == long))
		{
			if(itData.type is typeid(T))
			{
				return itData.dataLong;
			}
			else
			{
				throw new TreeIterError("getUserData", "IterData is not: long");
			}
		}
		else static if(is(T == float))
		{
			if(itData.type is typeid(T))
			{
				return itData.dataFloat;
			}
			else
			{
				throw new TreeIterError("getUserData", "IterData is not: float");
			}
		}
		else static if(is(T == double))
		{
			if(itData.type is typeid(T))
			{
				return itData.dataDouble;
			}
			else
			{
				throw new TreeIterError("getUserData", "IterData is not: double");
			}
		}
		else static if(is(T == string))
		{
			if(itData.type is typeid(T))
			{
				return itData.dataString;
			}
			else
			{
				throw new TreeIterError("getUserData", "IterData is not: string");
			}
		}
		else static if(is(T == void*))
		{
			if(itData.type is typeid(T))
			{
				return itData.dataUser;
			}
			else
			{
				throw new TreeIterError("getUserData", "IterData is not: void*");
			}
		}
		else
		{
			pragma(msg, "IterData Type not Suported");
			
			throw new TreeIterError("getUserData", "IterData Type not Suported");
		}
	}
	
	/**
	 */
}