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WIP: how to walk the tree ? A first step : first row 0: (ROOT) next row 0: (D) (line 103)

This commit is contained in:
Jean Sirmai 2023-12-25 00:23:13 +01:00
parent 125aea2127
commit 7b364f0674
Signed by: jean
GPG Key ID: FB3115C340E057E3
1 changed files with 80 additions and 32 deletions
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112
demos/gtk-demo/tree_store.c
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@ -27,6 +27,7 @@
/* _ _ _ _ _ _ _ _ _ _ _ _ _ _ T R E E _ _ _ _ _ _ _ _ _ _ _ _ _ _ */ /* _ _ _ _ _ _ _ _ _ _ _ _ _ _ T R E E _ _ _ _ _ _ _ _ _ _ _ _ _ _ */
/* */ /* */
/* https://developer-old.gnome.org/gtk4/stable/GtkTreeView.html */ /* https://developer-old.gnome.org/gtk4/stable/GtkTreeView.html */
/* https://en.wikibooks.org/wiki/GTK%2B_By_Example/Tree_View/Custom_Models */
/* https://developer-old.gnome.org/gtk4/stable/GtkTreeSelection.html#GtkTreeSelection-struct */ /* https://developer-old.gnome.org/gtk4/stable/GtkTreeSelection.html#GtkTreeSelection-struct */
/* https://developer-old.gnome.org/gtk4/stable/GtkTreeView.html#gtk-tree-view-get-path-at-pos << get-path-at-pos */ /* https://developer-old.gnome.org/gtk4/stable/GtkTreeView.html#gtk-tree-view-get-path-at-pos << get-path-at-pos */
/* Finds the path at the point (x , y ), relative to bin_window coordinates. Use gtk_tree_view_convert_widget_to_bin_window_coords(). */ /* Finds the path at the point (x , y ), relative to bin_window coordinates. Use gtk_tree_view_convert_widget_to_bin_window_coords(). */
@ -40,6 +41,7 @@
#include <gtk/gtk.h> #include <gtk/gtk.h>
#include <stdio.h> #include <stdio.h>
#include "config.h" #include "config.h"
#include "custom-list.h"
G_GNUC_BEGIN_IGNORE_DEPRECATIONS G_GNUC_BEGIN_IGNORE_DEPRECATIONS
@ -49,27 +51,89 @@ enum
NUM_COLUMNS NUM_COLUMNS
}; };
static GObjectClass *parent_class = NULL; /* GObject stuff - nothing to worry about */
static void custom_list_finalize (GObject *object);
static void
custom_list_class_init (CustomListClass *klass)
{
GObjectClass *object_class;
parent_class = (GObjectClass*) g_type_class_peek_parent (klass);
object_class = (GObjectClass*) klass;
object_class->finalize = custom_list_finalize;
}
static void
custom_list_tree_model_init (GtkTreeModelIface *iface)
{
/* Here we override the GtkTreeModel
* interface functions that we implement */
iface->get_flags = NULL; // custom_list_get_flags;
iface->get_n_columns = NULL; // custom_list_get_n_columns;
iface->get_column_type = NULL; // custom_list_get_column_type;
iface->get_iter = NULL; // custom_list_get_iter;
iface->get_path = NULL; // custom_list_get_path;
iface->get_value = NULL; // custom_list_get_value;
iface->iter_next = NULL; // custom_list_iter_next;
iface->iter_children = NULL; // custom_list_iter_children;
iface->iter_has_child = NULL; // custom_list_iter_has_child;
iface->iter_n_children = NULL; // custom_list_iter_n_children;
iface->iter_nth_child = NULL; // custom_list_iter_nth_child;
iface->iter_parent = NULL; // custom_list_iter_parent;
}
// gtk_tree_model_foreach (model, TRUE, my_user_data); https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#GtkTreeModelForeachFunc
static void iterating_a_model_in_a_depth_first_fashion (GtkTreeModel *model) static void iterating_a_model_in_a_depth_first_fashion (GtkTreeModel *model)
{ {
// gtk_tree_model_foreach (model, TRUE, my_user_data); https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#GtkTreeModelForeachFunc
// gboolean (*GtkTreeModelForeachFunc) (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data); // gboolean (*GtkTreeModelForeachFunc) (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data);
GtkTreeIter iter; GtkTreeIter iter, iter_parent;
gboolean valid; gboolean valid = 0;
int row_count = 0;
valid = gtk_tree_model_get_iter_first (model, &iter);
while (valid)
{
char *str_data; char *str_data;
// Make sure you terminate calls to gtk_tree_model_get() with a “-1” value int row_count = 0;
gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
g_print ("Row %d: (%s) <> gtk_tree_model_get_iter_first (model, &iter) &iter = [%s] (line 67) ", row_count, str_data, &iter); valid = gtk_tree_model_get_iter_first (model, &iter);
g_free (str_data); if (valid) gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
valid = gtk_tree_model_iter_next (model, &iter); g_print ("first row %d: (%s)\n", row_count, str_data);
// valid = gtk_tree_model_iter_children (model, &iter, parent); << how to get the parent ??
g_print ("valid = %d = gtk_tree_model_iter_next (model, &iter) %s (line 71)\n",\ valid = gtk_tree_model_iter_children (model, &iter_parent, &iter);
valid, gtk_tree_model_get_string_from_iter (model, &iter)); valid = gtk_tree_model_iter_children (model, &iter, &iter_parent);
row_count++; //gtk_tree_model_iter_next (model, &iter);
if (valid) gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
g_print ("next row %d: (%s)\n", row_count, str_data);
/* while (valid) first row 0: (ROOT) next row 0: (D)*/
/* { */
/* char *str_data; */
/* // Make sure you terminate calls to gtk_tree_model_get() with a “-1” value */
/* gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1); */
/* g_print ("Row %d: (%s) <> gtk_tree_model_get_iter_first (model, &iter) &iter = [%s] (line 67) ", row_count, str_data, "xxx");//&iter); */
/* g_free (str_data); */
/* valid = gtk_tree_model_iter_next (model, &iter); */
/* // valid = gtk_tree_model_iter_children (model, &iter, parent); << how to get the parent ?? */
/* g_print ("valid = %d = gtk_tree_model_iter_next (model, &iter) %s (line 69)\n",\ */
/* valid, gtk_tree_model_get_string_from_iter (model, &iter)); */
/* row_count++; */
/* } */
} }
// Three ways of getting the iter pointing to the location https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#gtk-tree-row-reference-new
static void acquiring_a_GtkTreeIter (GtkTreeModel *my_tree_model, GtkTreePath *my_tree_path)
{
GtkTreeIter iter; // get the iterator from a string
gtk_tree_model_get_iter_from_string (my_tree_model, &iter, gtk_tree_path_to_string (my_tree_path));
g_print ("acquiring_a_GtkTreeIter from path : [ %s ] (lines 225 & 108)\n", gtk_tree_path_to_string (my_tree_path));
my_tree_path = gtk_tree_path_new_from_string (gtk_tree_path_to_string (my_tree_path)); // get the iterator from a path
gtk_tree_model_get_iter (my_tree_model, &iter, my_tree_path);
gtk_tree_path_free (my_tree_path);
/* GtkTreeIter parent_iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, NULL, 3); // walk the tree to find the iterator */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 2); */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 5); */
} }
static void /* https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#GtkTreePath-struct and #gtk-tree-row-reference-new */ static void /* https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#GtkTreePath-struct and #gtk-tree-row-reference-new */
@ -100,22 +164,6 @@ edit_a_cell (GtkTreeModel *my_tree_model,
gtk_tree_model_row_inserted (my_tree_model, path, iter); // Emits the “row-inserted” signal on tree_model . gtk_tree_model_row_inserted (my_tree_model, path, iter); // Emits the “row-inserted” signal on tree_model .
} }
// Three ways of getting the iter pointing to the location https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#gtk-tree-row-reference-new
static void acquiring_a_GtkTreeIter (GtkTreeModel *my_tree_model, GtkTreePath *my_tree_path)
{
GtkTreeIter iter; // get the iterator from a string
gtk_tree_model_get_iter_from_string (my_tree_model, &iter, "3:2:5");
g_print ("acquiring_a_GtkTreeIter from path : [ %s ] (lines 225 & 108)\n", gtk_tree_path_to_string (my_tree_path));
my_tree_path = gtk_tree_path_new_from_string ("3:2:5"); // get the iterator from a path
gtk_tree_model_get_iter (my_tree_model, &iter, my_tree_path);
gtk_tree_path_free (my_tree_path);
/* GtkTreeIter parent_iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, NULL, 3); // walk the tree to find the iterator */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 2); */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 5); */
}
/* TreeItem structure */ /* TreeItem structure */
typedef struct _TreeItem TreeItem; typedef struct _TreeItem TreeItem;
struct _TreeItem struct _TreeItem