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authorChristopher James Lahey <clahey@helixcode.com>2000-03-01 05:07:06 +0800
committerChris Lahey <clahey@src.gnome.org>2000-03-01 05:07:06 +0800
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Test frozen columns
2000-02-29 Christopher James Lahey <clahey@helixcode.com> * test-table.c: Test frozen columns * e-table.c: Make frozen columns available through the xml file. * e-table-header.c, e-table-header.h, e-table-header-item.c: Added frozen columns API to let you specify some number of leading columns as undraggable. * Makefile.am: Add e-table-example-1.c and e-table-example-2.c. * e-table-example-1.c, e-table-example-2.c: New files. A couple of examples of ETable use. svn path=/trunk/; revision=1993
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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-table-simple.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-checkbox.h"
+#include "e-table.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "table-test.h"
+
+/*
+One way in which we make it simpler to build an ETableModel is through
+the ETableSimple class. Instead of creating your own ETableModel
+class, you simply create a new object of the ETableSimple class. You
+give it a bunch of functions that act as callbacks.
+
+You also get to pass a void * to ETableSimple and it gets passed to
+your callbacks. This would be for having multiple models of the same
+type. This is just an example though, so we statically define all the
+data and ignore the void *data parameter.
+
+In our example we will be creating a table model with 6 columns and 10
+rows. This corresponds to having 6 different types of information and
+10 different sets of data in our database.
+
+The headers will be hard coded, as will be the example data.
+
+*/
+
+/*
+ There are two different meanings to the word "column". The first is
+ the model column. A model column corresponds to a specific type of
+ data. This is very much like the usage in a database table where a
+ column is a field in the database.
+
+ The second type of column is a view column. A view column
+ corresponds to a visually displayed column. Each view column
+ corresponds to a specific model column, though a model column may
+ have any number of view columns associated with it, from zero to
+ greater than one.
+
+ Also, a view column doesn't necessarily depend on only one model
+ column. In some cases, the view column renderer can be given a
+ reference to another column to get extra information about its
+ display.
+*/
+
+#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> <leaf column=\"1\" ascending=\"1\"/> </grouping> \
+</ETableSpecification>"
+
+char *headers[COLS] = {
+ "Email",
+ "Full Name",
+ "Address",
+ "Phone"
+};
+
+/* Virtual Column list:
+ 0 Email
+ 1 Full Name
+ 2 Address
+ 3 Phone
+*/
+
+char *table_data[ROWS][COLS];
+
+/*
+ * 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 number of rows in our ETableModel. */
+static int
+my_row_count (ETableModel *etc, void *data)
+{
+ return ROWS;
+}
+
+/* This function returns the value at a particular point in our ETableModel. */
+static void *
+my_value_at (ETableModel *etc, int col, int row, void *data)
+{
+ return (void *) table_data [row][col];
+}
+
+/* This function sets the value at a particular point in our ETableModel. */
+static void
+my_set_value_at (ETableModel *etc, int col, int row, const void *val, void *data)
+{
+ g_free (table_data [row][col]);
+ table_data [row][col] = g_strdup (val);
+}
+
+/* This function returns whether a particular cell is editable. */
+static gboolean
+my_is_cell_editable (ETableModel *etc, int col, int row, void *data)
+{
+ return TRUE;
+}
+
+/* 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 table. */
+static void
+create_table()
+{
+ GtkWidget *e_table, *window, *frame;
+ ECell *cell_left_just;
+ ETableHeader *e_table_header;
+ int i, j;
+ ETableModel *e_table_model = NULL;
+
+ /* First we fill in the simple data. */
+ for ( i = 0; i < ROWS; i++ ) {
+ for ( j = 0; j < COLS; j++ ) {
+ table_data[i][j] = g_strdup("");
+ }
+ }
+ /* Next we create our model. This uses the functions we defined
+ earlier. */
+ e_table_model = e_table_simple_new (
+ my_col_count, my_row_count, my_value_at,
+ my_set_value_at, my_is_cell_editable,
+ my_duplicate_value, my_free_value, my_thaw, 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, NULL, GTK_JUSTIFY_LEFT, TRUE);
+
+ /* 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, 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, INITIAL_SPEC);
+
+ /* 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_table 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_table();
+
+ gtk_main ();
+
+ e_cursors_shutdown ();
+ return 0;
+}