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authorChris Toshok <toshok@helixcode.com>2000-06-09 07:16:22 +0800
committerChris Toshok <toshok@src.gnome.org>2000-06-09 07:16:22 +0800
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tree16fd9ebf869dd9fd82d265ce5a60a4ea7aeba652 /widgets/e-table/e-tree-example-1.c
parentf856d999c5cade657d045ea22b1fb64be481829d (diff)
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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
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* This code is GPL. */
+#include <stdio.h>
+#include <string.h>
+#include <gnome.h>
+#include "e-util/e-cursors.h"
+#include "e-tree-gnode.h"
+#include "e-table-header.h"
+#include "e-table-header-item.h"
+#include "e-table-item.h"
+#include "e-cell-text.h"
+#include "e-cell-tree.h"
+#include "e-cell-checkbox.h"
+#include "e-table.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#define ROWS 10
+#define COLS 4
+
+#define IMPORTANCE_COLUMN 4
+#define COLOR_COLUMN 5
+
+/*
+ * Here we define the initial layout of the table. This is an xml
+ * format that allows you to change the initial ordering of the
+ * columns or to do sorting or grouping initially. This specification
+ * shows all 5 columns, but moves the importance column nearer to the
+ * front. It also sorts by the "Full Name" column (ascending.)
+ * Sorting and grouping take the model column as their arguments
+ * (sorting is specified by the "column" argument to the leaf elemnt.
+ */
+
+#define INITIAL_SPEC "<ETableSpecification> \
+ <columns-shown> \
+ <column> 0 </column> \
+ <column> 4 </column> \
+ <column> 1 </column> \
+ <column> 2 </column> \
+ <column> 3 </column> \
+ </columns-shown> \
+ <grouping></grouping> \
+</ETableSpecification>"
+
+/*
+ * Virtual Column list:
+ * 0 Subject
+ * 1 Full Name
+ * 2 Email
+ * 3 Date
+ */
+char *headers [COLS] = {
+ "Subject",
+ "Full Name",
+ "Email",
+ "Date"
+};
+
+/*
+ * ETableSimple callbacks
+ * These are the callbacks that define the behavior of our custom model.
+ */
+
+/*
+ * Since our model is a constant size, we can just return its size in
+ * the column and row count fields.
+ */
+
+/* This function returns the number of columns in our ETableModel. */
+static int
+my_col_count (ETableModel *etc, void *data)
+{
+ return COLS;
+}
+
+/* This function returns the value at a particular point in our ETableModel. */
+static void *
+my_value_at (ETreeModel *etc, GNode *node, int col, void *data)
+{
+ switch (col) {
+ case 0: return "Re: Two things";
+ case 1: return "Chris Toshok";
+ case 2: return "toshok@helixcode.com";
+ case 3: return "Jun 07 2000";
+ default: return NULL;
+ }
+}
+
+/* This function sets the value at a particular point in our ETableModel. */
+static void
+my_set_value_at (ETableModel *etc, GNode *node, int col, const void *val, void *data)
+{
+}
+
+/* This function returns whether a particular cell is editable. */
+static gboolean
+my_is_editable (ETableModel *etc, GNode *node, int col, void *data)
+{
+ return FALSE;
+}
+
+/* This function duplicates the value passed to it. */
+static void *
+my_duplicate_value (ETableModel *etc, int col, const void *value, void *data)
+{
+ return g_strdup (value);
+}
+
+/* This function frees the value passed to it. */
+static void
+my_free_value (ETableModel *etc, int col, void *value, void *data)
+{
+ g_free (value);
+}
+
+/* This function is for when the model is unfrozen. This can mostly
+ be ignored for simple models. */
+static void
+my_thaw (ETableModel *etc, void *data)
+{
+}
+
+/* We create a window containing our new tree. */
+static void
+create_tree (void)
+{
+ GtkWidget *e_table, *window, *frame;
+ ECell *cell_left_just;
+ ECell *cell_tree;
+ ETableHeader *e_table_header;
+ int i, j;
+ ETreeModel *e_tree_model = NULL;
+ GNode *root_node;
+
+ /* create a root node with 5 children */
+ root_node = g_node_new (NULL);
+ for (i = 0; i < 5; i++){
+ GNode *n = g_node_insert (root_node, 0, g_node_new(NULL));
+ for (j = 0; j < 5; j ++) {
+ g_node_insert (n, 0, g_node_new(NULL));
+ }
+ }
+
+ /* Next we create our model. This uses the functions we defined
+ earlier. */
+ e_tree_model = e_tree_gnode_new (root_node,
+ my_value_at,
+ NULL);
+
+ /*
+ * Next we create a header. The ETableHeader is used in two
+ * different way. The first is the full_header. This is the
+ * list of possible columns in the view. The second use is
+ * completely internal. Many of the ETableHeader functions are
+ * for that purpose. The only functions we really need are
+ * e_table_header_new and e_table_header_add_col.
+ *
+ * First we create the header.
+ */
+ e_table_header = e_table_header_new ();
+
+ /*
+ * Next we have to build renderers for all of the columns.
+ * Since all our columns are text columns, we can simply use
+ * the same renderer over and over again. If we had different
+ * types of columns, we could use a different renderer for
+ * each column.
+ */
+ cell_left_just = e_cell_text_new (E_TABLE_MODEL(e_tree_model), NULL, GTK_JUSTIFY_LEFT);
+
+ /*
+ * This renderer is used for the tree column (the leftmost one), and
+ * has as its subcell renderer the text renderer. this means that
+ * text is displayed to the right of the tree pipes.
+ */
+ cell_tree = e_cell_tree_new (E_TABLE_MODEL(e_tree_model), TRUE, cell_left_just);
+
+ /*
+ * Next we create a column object for each view column and add
+ * them to the header. We don't create a column object for
+ * the importance column since it will not be shown.
+ */
+ for (i = 0; i < COLS; i++) {
+ /* Create the column. */
+ ETableCol *ecol = e_table_col_new (
+ i, headers [i],
+ 80, 20,
+ i == 0 ? cell_tree
+ : cell_left_just,
+ g_str_compare, TRUE);
+ /* Add it to the header. */
+ e_table_header_add_column (e_table_header, ecol, i);
+ }
+
+ /*
+ * Here we create a window for our new table. This window
+ * will get shown and the person will be able to test their
+ * item.
+ */
+ window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+
+ /* This frame is simply to get a bevel around our table. */
+ frame = gtk_frame_new (NULL);
+
+ /*
+ * Here we create the table. We give it the three pieces of
+ * the table we've created, the header, the model, and the
+ * initial layout. It does the rest.
+ */
+ e_table = e_table_new (e_table_header, E_TABLE_MODEL(e_tree_model), INITIAL_SPEC);
+
+ if (!e_table) printf ("BAH!");
+
+ /* Build the gtk widget hierarchy. */
+ gtk_container_add (GTK_CONTAINER (frame), e_table);
+ gtk_container_add (GTK_CONTAINER (window), frame);
+
+ /* Size the initial window. */
+ gtk_widget_set_usize (window, 200, 200);
+
+ /* Show it all. */
+ gtk_widget_show_all (window);
+}
+
+/* This is the main function which just initializes gnome and call our create_tree function */
+
+int
+main (int argc, char *argv [])
+{
+ gnome_init ("TableExample", "TableExample", argc, argv);
+ e_cursors_init ();
+
+ gtk_widget_push_visual (gdk_rgb_get_visual ());
+ gtk_widget_push_colormap (gdk_rgb_get_cmap ());
+
+ create_tree ();
+
+ gtk_main ();
+
+ e_cursors_shutdown ();
+ return 0;
+}
+