plugins/libctrl.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    "ctrl"
  35 #define GENERATOR_CLASS_PATH    "Controls/Control"
  36
  37 #define EVT_VALUE 0
  38 #define EVT_DISP 1
  39 #define EVT_NORM 2
  40 #define EVT_OUTPUT 0
  41
  42 typedef struct Data {
  43   gdouble min, max, step, page;
  44   gdouble value;
  45 } Data;
  46
  47 PRIVATE int init_instance(Generator *g) {
  48   Data *data = safe_malloc(sizeof(Data));
  49   g->data = data;
  50
  51   data->min = data->value = 0;
  52   data->max = 100;
  53   data->step = data->page = 1;
  54
  55   return 1;
  56 }
  57
  58 PRIVATE void destroy_instance(Generator *g) {
  59   free(g->data);
  60 }
  61
  62 PRIVATE void unpickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
  63   Data *data = safe_malloc(sizeof(Data));
  64   g->data = data;
  65
  66   data->min = objectstore_item_get_double(item, "ctrl_min", 0);
  67   data->max = objectstore_item_get_double(item, "ctrl_max", 0);
  68   data->step = objectstore_item_get_double(item, "ctrl_step", 0);
  69   data->page = objectstore_item_get_double(item, "ctrl_page", 0);
  70   data->value = objectstore_item_get_double(item, "ctrl_value", 0);
  71 }
  72
  73 PRIVATE void pickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
  74   Data *data = g->data;
  75   objectstore_item_set_double(item, "ctrl_min", data->min);
  76   objectstore_item_set_double(item, "ctrl_max", data->max);
  77   objectstore_item_set_double(item, "ctrl_step", data->step);
  78   objectstore_item_set_double(item, "ctrl_page", data->page);
  79   objectstore_item_set_double(item, "ctrl_value", data->value);
  80 }
  81
  82 PRIVATE void ctrl_setrange(Control *c) {
  83   Data *data= c->g->data;
  84
  85   c->min = data->min;
  86   c->max = data->max;
  87   c->step = data->step;
  88   c->page = data->page;
  89 }
  90
  91 PRIVATE void evt_value_handler(Generator *g, AEvent *event) {
  92   Data *data = g->data;
  93
  94
  95   data->value = event->d.number;
  96   gen_update_controls(g, -1);
  97   gen_send_events(g, EVT_OUTPUT, -1, event);
  98 }
  99
 100 PRIVATE void evt_disp_handler(Generator *g, AEvent *event) {
 101   Data *data = g->data;
 102
 103   data->value = event->d.number;
 104   gen_update_controls(g, -1);
 105 }
 106
 107 PRIVATE void evt_normal_value_handler(Generator *g, AEvent *event) {
 108   Data *data = g->data;
 109
 110   if( event->kind == AE_NUMBER ) {
 111       data->value = data->min + (event->d.number+1.0)*(data->max - data->min)/2.0;
 112       event->d.number=data->value;
 113       gen_update_controls(g, -1);
 114       gen_send_events(g, EVT_OUTPUT, -1, event);
 115   }
 116 }
 117
 118 PRIVATE ControlDescriptor controls[] = {
 119   { CONTROL_KIND_KNOB, "knob", 0,0,0,0,0,TRUE, 1,EVT_VALUE,
 120     ctrl_setrange,NULL, control_double_updater, (gpointer) offsetof(Data, value) },
 121   { CONTROL_KIND_SLIDER, "slider", 0,0,0,0,0,TRUE, 1,EVT_VALUE,
 122     ctrl_setrange,NULL, control_double_updater, (gpointer) offsetof(Data, value) },
 123   { CONTROL_KIND_TOGGLE, "toggle", 0,0,0,0,0,FALSE, 1,EVT_VALUE,
 124     ctrl_setrange,NULL, control_double_updater, (gpointer) offsetof(Data, value) },
 125   { CONTROL_KIND_BUTTON, "button", 0,0,0,0,0,FALSE, 1,EVT_VALUE,
 126     ctrl_setrange,NULL, control_double_updater, (gpointer) offsetof(Data, value) },
 127   { CONTROL_KIND_NONE, }
 128 };
 129
 130 PRIVATE GtkWidget *build_entry(GtkWidget *vbox, char *text, gdouble value) {
 131   GtkWidget *hbox = gtk_hbox_new(FALSE, 2);
 132   GtkWidget *label = gtk_label_new(text);
 133   GtkWidget *entry = gtk_entry_new();
 134   char buf[128];
 135
 136   gtk_box_pack_start(GTK_BOX(hbox), label, TRUE, TRUE, 0);
 137   gtk_box_pack_start(GTK_BOX(hbox), entry, TRUE, TRUE, 0);
 138   gtk_box_pack_start(GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
 139   gtk_widget_show(label);
 140   gtk_widget_show(entry);
 141   gtk_widget_show(hbox);
 142
 143   sprintf(buf, "%g", value);
 144   gtk_entry_set_text(GTK_ENTRY(entry), buf);
 145
 146   return entry;
 147 }
 148
 149 PRIVATE void props(Component *c, Generator *g) {
 150   Data *data = g->data;
 151   GtkWidget *min, *max, *step, *page;
 152   GtkWidget *vbox;
 153
 154   vbox = gtk_vbox_new(FALSE, 2);
 155
 156   min = build_entry(vbox, "Range Minimum:", data->min);
 157   max = build_entry(vbox, "Range Maximum:", data->max);
 158   step = build_entry(vbox, "Step Increment:", data->step);
 159   page = build_entry(vbox, "Page Increment:", data->page);
 160
 161   if (popup_dialog(g->name, MSGBOX_OK | MSGBOX_CANCEL, 0, MSGBOX_OK, vbox, NULL, 0) == MSGBOX_OK) {
 162     data->min = atof(gtk_entry_get_text(GTK_ENTRY(min)));
 163     data->max = atof(gtk_entry_get_text(GTK_ENTRY(max)));
 164     data->step = atof(gtk_entry_get_text(GTK_ENTRY(step)));
 165     data->page = atof(gtk_entry_get_text(GTK_ENTRY(page)));
 166
 167     g_list_foreach(g->controls, (GFunc) ctrl_setrange, NULL);
 168     g_list_foreach(g->controls, (GFunc) control_update_range, NULL);
 169   }
 170 }
 171
 172 #if 0
 173 PRIVATE void init_combo( Control *control ) {
 174
 175 }
 176
 177 PRIVATE void done_combo(Control *control) {
 178 }
 179
 180 PRIVATE void refresh_combo(Control *control) {
 181 }
 182 #endif
 183
 184 PRIVATE void setup_class(void) {
 185   GeneratorClass *k = gen_new_generatorclass(GENERATOR_CLASS_NAME, FALSE, 3, 1,
 186                                              NULL, NULL, controls,
 187                                              init_instance, destroy_instance,
 188                                              unpickle_instance, pickle_instance);
 189
 190   gen_configure_event_input(k, EVT_VALUE, "Value", evt_value_handler);
 191   gen_configure_event_input(k, EVT_DISP, "Display", evt_disp_handler);
 192   gen_configure_event_input(k, EVT_NORM, "Normal Value", evt_normal_value_handler );
 193   gen_configure_event_output(k, EVT_OUTPUT, "Output");
 194
 195   gencomp_register_generatorclass(k, FALSE, GENERATOR_CLASS_PATH, NULL, props);
 196 }
 197
 198 PUBLIC void init_plugin(void) {
 199   setup_class();
 200 }