plugins/libstrcombo.c

   1 /* gAlan - Graphical Audio Language
   2  * Copyright (C) 1999 Tony Garnock-Jones
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <stddef.h>
  23
  24 #include <gdk/gdk.h>
  25 #include <gtk/gtk.h>
  26
  27 #include "global.h"
  28 #include "generator.h"
  29 #include "comp.h"
  30 #include "control.h"
  31 #include "gencomp.h"
  32 #include "msgbox.h"
  33
  34 #define GENERATOR_CLASS_NAME    "strcombo"
  35 #define GENERATOR_CLASS_PATH    "Controls/String Combobox"
  36
  37 #define EVT_VALUE 0
  38 #define EVT_OUTPUT 0
  39
  40 typedef struct Data {
  41     GList    *list;
  42 } Data;
  43
  44 typedef struct ControlData {
  45 } ControlData;
  46
  47 PRIVATE int init_instance(Generator *g) {
  48   Data *data = safe_malloc(sizeof(Data));
  49
  50   data->list = NULL;
  51
  52   g->data = data;
  53   return 1;
  54 }
  55
  56 PRIVATE void destroy_instance(Generator *g) {
  57     Data *data = g->data;
  58
  59     g_list_free( data->list );
  60     free(data);
  61 }
  62
  63
  64 PRIVATE void unpickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
  65
  66   Data *data = safe_malloc(sizeof(Data));
  67
  68   ObjectStoreDatum *array = objectstore_item_get(item, "strings");
  69   data->list = NULL;
  70
  71   if (array != NULL) {
  72       int i;
  73       int len = objectstore_datum_array_length(array);
  74       for (i = 0; i < len; i++) {
  75           ObjectStoreDatum *datum = objectstore_datum_array_get(array, i);
  76
  77           data->list = g_list_append(data->list,
  78                   (gpointer) objectstore_datum_string_value(datum));
  79       }
  80   }
  81
  82   g->data = data;
  83 }
  84
  85 PRIVATE void pickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
  86
  87   Data *data = g->data;
  88   int len = g_list_length( data->list );
  89   int i;
  90   GList *curr;
  91
  92   ObjectStoreDatum *array = objectstore_datum_new_array(len);
  93
  94   objectstore_item_set(item, "strings", array);
  95
  96   for( i=0, curr=data->list; i<len; i++, curr=g_list_next(curr) )
  97       objectstore_datum_array_set(array, i, objectstore_datum_new_string((char *) curr->data));
  98 }
  99
 100
 101 PRIVATE void entry_activated( GtkEntry *entry, Control *control ) {
 102
 103     Generator *g = control->g;
 104     AEvent event;
 105     gchar *str = gtk_editable_get_chars( GTK_EDITABLE( GTK_COMBO(control->widget)->entry ), 0, -1 );
 106
 107
 108     gen_init_aevent(&event, AE_STRING, NULL, 0, NULL, 0, gen_get_sampletime() );
 109     event.d.string = safe_string_dup( str );
 110     g_free( str );
 111
 112     gen_send_events(g, EVT_OUTPUT, -1, &event);
 113 }
 114
 115
 116
 117 PRIVATE void init_combo( Control *control ) {
 118
 119     GtkCombo *cb;
 120
 121     cb = GTK_COMBO( gtk_combo_new() );
 122     g_assert( cb != NULL );
 123
 124     gtk_combo_disable_activate( cb );
 125     if( ((Data *)control->g->data)->list != NULL )
 126         gtk_combo_set_popdown_strings( cb, ((Data *)control->g->data)->list );
 127
 128     gtk_signal_connect( GTK_OBJECT( cb->entry ), "activate", GTK_SIGNAL_FUNC(entry_activated), control );
 129
 130     control->widget = GTK_WIDGET(cb);
 131 }
 132
 133 PRIVATE void done_combo(Control *control) {
 134 }
 135
 136 PRIVATE void refresh_combo(Control *control) {
 137     Data *data = control->g->data;
 138
 139     if( ((Data *)control->g->data)->list != NULL )
 140         gtk_combo_set_popdown_strings( GTK_COMBO(control->widget), data->list );
 141
 142 }
 143
 144
 145 PRIVATE void evt_value_handler(Generator *g, AEvent *event) {
 146
 147   Data *data = g->data;
 148
 149   if( event->kind == AE_STRING ) {
 150
 151       gchar *str = safe_string_dup( event->d.string );
 152       data->list = g_list_append( data->list, str );
 153   }
 154
 155   gen_update_controls(g, -1);
 156 }
 157
 158 PRIVATE ControlDescriptor controls[] = {
 159   { CONTROL_KIND_USERDEF, "combo", 0,0,0,0, 0,FALSE, 0,0, init_combo, done_combo, refresh_combo },
 160   { CONTROL_KIND_NONE, }
 161 };
 162
 163
 164
 165 PRIVATE void setup_class(void) {
 166   GeneratorClass *k = gen_new_generatorclass(GENERATOR_CLASS_NAME, FALSE, 1, 1,
 167                                              NULL, NULL, controls,
 168                                              init_instance, destroy_instance,
 169                                              unpickle_instance, pickle_instance);
 170
 171   gen_configure_event_input(k, EVT_VALUE, "Value", evt_value_handler);
 172   gen_configure_event_output(k, EVT_OUTPUT, "Output");
 173
 174   gencomp_register_generatorclass(k, FALSE, GENERATOR_CLASS_PATH, NULL, NULL);
 175 }
 176
 177 PUBLIC void init_plugin(void) {
 178   setup_class();
 179 }