New files. A tree model using a GNode structure to store it's info.

2000-06-08  Chris Toshok  <toshok@helixcode.com>

	* e-tree-gnode.c, e-tree-gnode.h: New files.  A tree model using a
	GNode structure to store it's info.

	* e-tree-model.c, e-tree-model.h: New files.  A proxy model
	sitting between a table model and the real tree model (of which
	ETreeGNode is an example).

	* e-cell-tree.c, e-cell-tree.h: New files.  A cell renderer
	capable of wrapping up a subcell and drawing the tree controls for
	expanding/collapsing trees.

	* tree-expanded.xpm, tree-unexpanded.xpm: New files.  the standard
	+ and - icons.

	* e-tree-example-1.c: New file, giving a (pretty poor :) example
	of using ETreeGNode.

	* Makefile.am: at the tree stuff to the build, and build
	tree-example-1.

	* .cvsignore: ignore tree-example-1.

svn path=/trunk/; revision=3483

1 files changed, 72 insertions, 0 deletions

diff --git a/widgets/table/e-tree-model.h b/widgets/table/e-tree-model.h
new file mode 100644
index 0000000000..6924f3ea0e
--- /dev/null
+++ b/widgets/table/e-tree-model.h
@@ -0,0 +1,72 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+#ifndef _E_TREE_MODEL_H_
+#define _E_TREE_MODEL_H_
+
+#include "e-table-model.h"
+
+#define E_TREE_MODEL_TYPE        (e_tree_model_get_type ())
+#define E_TREE_MODEL(o)          (GTK_CHECK_CAST ((o), E_TREE_MODEL_TYPE, ETreeModel))
+#define E_TREE_MODEL_CLASS(k)    (GTK_CHECK_CLASS_CAST((k), E_TREE_MODEL_TYPE, ETreeModelClass))
+#define E_IS_TREE_MODEL(o)       (GTK_CHECK_TYPE ((o), E_TREE_MODEL_TYPE))
+#define E_IS_TREE_MODEL_CLASS(k) (GTK_CHECK_CLASS_TYPE ((k), E_TREE_MODEL_TYPE))
+
+typedef gpointer ETreePathItem;
+typedef GList ETreePath;
+
+typedef struct {
+	ETableModel base;
+
+	ETableModel *source;
+
+	ETreePath *root_node;
+
+	GArray  *array;
+
+} ETreeModel;
+
+typedef struct {
+	ETableModelClass parent_class;
+
+	/*
+	 * Virtual methods
+	 */
+	ETreePath *(*get_root)      (ETreeModel *etm);
+
+	ETreePath *(*get_next)      (ETreeModel *etm, ETreePath* node);
+	ETreePath *(*get_prev)      (ETreeModel *etm, ETreePath* node);
+
+	void      *(*value_at)      (ETreeModel *etm, ETreePath* node, int col);
+	void       (*set_value_at)  (ETreeModel *etm, ETreePath* node, int col, const void *val);
+	gboolean   (*is_editable)   (ETreeModel *etm, ETreePath* node, int col);
+
+	guint      (*get_children)  (ETreeModel *etm, ETreePath* node, ETreePath ***paths);
+	void       (*release_paths) (ETreeModel *etm, ETreePath **paths, guint num_paths);
+	gboolean   (*is_expanded)   (ETreeModel *etm, ETreePath* node);
+	void       (*set_expanded)  (ETreeModel *etm, ETreePath* node, gboolean expanded);
+
+	/*
+	 * Signals
+	 */
+
+} ETreeModelClass;
+
+GtkType     e_tree_model_get_type (void);
+
+ETreeModel *e_tree_model_new (void);
+
+/* operations on "nodes" in the tree */
+ETreePath * e_tree_model_get_root (ETreeModel *etree);
+ETreePath * e_tree_model_node_at_row (ETreeModel *etree, int row);
+guint e_tree_model_node_depth (ETreeModel *etree, ETreePath *path);
+ETreePath *e_tree_model_node_get_parent (ETreeModel *etree, ETreePath *path);
+ETreePath *e_tree_model_node_get_next (ETreeModel *etree, ETreePath *path);
+ETreePath *e_tree_model_node_get_prev (ETreeModel *etree, ETreePath *path);
+gboolean e_tree_model_node_is_root (ETreeModel *etree, ETreePath *path);
+
+gboolean e_tree_model_node_is_expandable (ETreeModel *etree, ETreePath *path);
+gboolean e_tree_model_node_is_expanded (ETreeModel *etree, ETreePath *path);
+guint e_tree_model_node_get_children (ETreeModel *etree, ETreePath *path, ETreePath ***paths);
+void e_tree_model_release_paths (ETreeModel *etree, ETreePath **paths, guint num_paths);
+guint e_tree_model_node_num_visible_descendents (ETreeModel *etm, ETreePath *node);
+
+#endif /* _E_TREE_MODEL_H */