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Diffstat (limited to 'widgets/e-table/e-table-example-2.c')
| -rw-r--r-- | widgets/e-table/e-table-example-2.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/widgets/e-table/e-table-example-2.c b/widgets/e-table/e-table-example-2.c new file mode 100644 index 0000000000..bb05a1d198 --- /dev/null +++ b/widgets/e-table/e-table-example-2.c @@ -0,0 +1,296 @@ +/* -*- 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 VIEW_COLS 4 +#define PHYSICAL_COLS 5 +#define VIRTUAL_COLS 6 + +#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[VIEW_COLS] = { + "Email", + "Full Name", + "Address", + "Phone" +}; + +/* Virtual Column list: + 0 Full Name + 1 Email + 2 Address + 3 Phone + 4 Importance field. This field will be a boolean. It also has a + special header, so doesn't appear in the headers list. + 5 Color field. This column is also not displayed. It is also + not stored in the database. It's calculated based on the + Importance field. +*/ + +char *table_data[ROWS][VIEW_COLS]; +gboolean importance_data[ROWS]; + +/* + * 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. */ + +static GdkColor *color1; +static GdkColor *color2; + +static int +my_col_count (ETableModel *etc, void *data) +{ + return VIRTUAL_COLS; +} + +static int +my_row_count (ETableModel *etc, void *data) +{ + return ROWS; +} + +static void * +my_value_at (ETableModel *etc, int col, int row, void *data) +{ + if ( col == COLOR_COLUMN ) { + if ( importance_data[row] ) { + return color1; + } else { + return color2; + } + } else if ( col == IMPORTANCE_COLUMN ) { + return (gpointer) importance_data[row]; + } else { + return (void *) table_data [row][col]; + } +} + +static void +my_set_value_at (ETableModel *etc, int col, int row, const void *val, void *data) +{ + if ( col == COLOR_COLUMN ) { + } else if ( col == IMPORTANCE_COLUMN ) { + importance_data[row] = (gboolean) val; + } else { + g_free (table_data [row][col]); + table_data [row][col] = g_strdup (val); + } +} + +static gboolean +my_is_cell_editable (ETableModel *etc, int col, int row, void *data) +{ + if ( col == IMPORTANCE_COLUMN ) + return FALSE; + else + return TRUE; +} + +static void * +my_duplicate_value (ETableModel *etc, int col, const void *value, void *data) +{ + if ( col == COLOR_COLUMN ) { + return (void *) value; + } else if ( col == IMPORTANCE_COLUMN ) { + return (void *) value; + } else { + return g_strdup(value); + } +} + +static void +my_free_value (ETableModel *etc, int col, void *value, void *data) +{ + if ( col == COLOR_COLUMN ) { + } else if ( col == IMPORTANCE_COLUMN ) { + } else { + g_free(value); + } +} + +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; + ECell *cell_checkbox; + ETableHeader *e_table_header; + int i, j; + ETableModel *e_table_model = NULL; + ETableCol *ecol; + GdkPixbuf *pixbuf; + + /* First we fill in the simple data. */ + for ( i = 0; i < ROWS; i++ ) { + for ( j = 0; j < VIEW_COLS; j++ ) { + table_data[i][j] = g_strdup(""); + } + importance_data[i] = FALSE; + } + /* 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 < VIEW_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); + } + + /* Next we add a special column for the check box. */ + + cell_checkbox = e_cell_checkbox_new (); + pixbuf = gdk_pixbuf_new_from_file("clip.png"); + ecol = e_table_col_new_with_pixbuf (i, pixbuf, 18, 18, cell_checkbox, g_int_compare, TRUE); + e_table_header_add_column (e_table_header, ecol, i); + + /* + * Setup GUI + */ + /* 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); +} + + + +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; +} |