ui/listbox.c

   1 /* $Id: listbox.c,v 1.4 2005-01-24 22:19:10 schaffner Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 #ifdef RCS
  16 static char rcsid[] = "$Id: listbox.c,v 1.4 2005-01-24 22:19:10 schaffner Exp $";
  17 #endif
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "conf.h"
  21 #endif
  22
  23 #include <stdlib.h>
  24
  25 #include "fix.h"
  26 #include "pstypes.h"
  27 #include "gr.h"
  28 #include "ui.h"
  29 #include "key.h"
  30
  31 #define TICKER (*(volatile int *)0x46C)
  32
  33 void ui_draw_listbox( UI_GADGET_LISTBOX * listbox )
  34 {
  35         int i, x, y, stop;
  36         int w, h,  aw;
  37
  38         //if (listbox->current_item<0)
  39         //    listbox->current_item=0;
  40         //if (listbox->current_item>=listbox->num_items)
  41         //    listbox->current_item = listbox->num_items-1;
  42         //if (listbox->first_item<0)
  43         //   listbox->first_item=0;
  44         //if (listbox->first_item>(listbox->num_items-listbox->num_items_displayed))
  45         //    listbox->first_item=(listbox->num_items-listbox->num_items_displayed);
  46
  47         if ((listbox->status!=1) && !listbox->moved )
  48                 return;
  49
  50         stop = listbox->first_item+listbox->num_items_displayed;
  51         if (stop>listbox->num_items) stop = listbox->num_items;
  52
  53         listbox->status = 0;
  54
  55         x = y = 0;
  56         ui_mouse_hide();
  57         gr_set_current_canvas( listbox->canvas );
  58
  59         for (i= listbox->first_item; i< stop; i++ )
  60         {
  61                 if (i !=listbox->current_item)
  62                 {
  63                         if ((listbox->current_item == -1) && (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox) && (i == listbox->first_item)  )
  64                                 gr_set_fontcolor( CRED, CBLACK );
  65                         else
  66                                 gr_set_fontcolor( CWHITE, CBLACK );
  67                 }
  68                 else
  69                 {
  70                         if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox)
  71                                 gr_set_fontcolor( CRED, CGREY );
  72                         else
  73                                 gr_set_fontcolor( CBLACK, CGREY );
  74                 }
  75                 gr_string( x+2, y, listbox->list+i*listbox->text_width );
  76                 gr_get_string_size(listbox->list+i*listbox->text_width, &w, &h,&aw );
  77
  78                 if (i==listbox->current_item)
  79                         gr_setcolor( CGREY );
  80                 else
  81                         gr_setcolor( CBLACK );
  82
  83                 gr_rect( x+w+2, y, listbox->width-1, y+h-1 );
  84                 gr_rect( x, y, x+1, y+h-1 );
  85
  86                 y += h;
  87         }
  88
  89         if (stop < listbox->num_items_displayed-1 )
  90         {
  91                 gr_setcolor(CBLACK);
  92                 gr_rect( x, y, listbox->width-1, listbox->height-1 );
  93         }
  94
  95         //gr_ubox( -1, -1, listbox->width, listbox->height);
  96         ui_mouse_show();
  97
  98 }
  99
 100
 101 void gr_draw_sunken_border( short x1, short y1, short x2, short y2 )
 102 {
 103
 104         gr_setcolor( CGREY );
 105         Hline( x1-1, x2+1, y1-1);
 106         Vline( y1-1, y2+1, x1-1);
 107
 108         gr_setcolor( CBRIGHT );
 109         Hline( x1-1, x2+1, y2+1);
 110         Vline( y1, y2+1, x2+1);
 111
 112 }
 113
 114
 115 UI_GADGET_LISTBOX * ui_add_gadget_listbox( UI_WINDOW * wnd, short x, short y, short w, short h, short numitems, char * list, int text_width )
 116 {
 117         int tw, th, taw, i;
 118
 119         UI_GADGET_LISTBOX * listbox;
 120
 121         gr_get_string_size("*", &tw, &th, &taw );
 122
 123         i = h / th;
 124         h = i * th;
 125
 126         listbox = (UI_GADGET_LISTBOX *)ui_gadget_add( wnd, 2, x, y, x+w-1, y+h-1 );
 127
 128         listbox->list = list;
 129         listbox->text_width = text_width;
 130         listbox->width = w;
 131         listbox->height = h;
 132         listbox->num_items = numitems;
 133         listbox->num_items_displayed = i;
 134         listbox->first_item = 0;
 135         listbox->current_item = -1;
 136         listbox->last_scrolled = 0;
 137         listbox->textheight = th;
 138         listbox->dragging = 0;
 139         listbox->selected_item = -1;
 140         listbox->moved = 1;
 141
 142         listbox->scrollbar = ui_add_gadget_scrollbar( wnd, x+w+3, y, 0, h, 0, numitems-i, 0, i );
 143         listbox->scrollbar->parent = (UI_GADGET *)listbox;
 144
 145         gr_set_current_canvas( listbox->canvas );
 146
 147         gr_setcolor(CBLACK);
 148         gr_rect( 0, 0, w-1, h-1);
 149
 150         gr_draw_sunken_border( -2, -2, w+listbox->scrollbar->width+4, h+1);
 151
 152         return listbox;
 153
 154 }
 155
 156 void ui_listbox_do( UI_GADGET_LISTBOX * listbox, int keypress )
 157 {
 158         int OnMe, mitem, oldfakepos, kf;
 159
 160         listbox->selected_item = -1;
 161
 162         listbox->moved = 0;
 163
 164         if (listbox->num_items < 1 ) {
 165                 listbox->current_item = -1;
 166                 listbox->first_item = 0;
 167                 listbox->old_current_item = listbox->current_item;
 168                 listbox->old_first_item = listbox->first_item;
 169                 ui_draw_listbox( listbox );
 170
 171                 if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox)
 172                 {
 173                         CurWindow->keyboard_focus_gadget = ui_gadget_get_next((UI_GADGET *)listbox);
 174                 }
 175
 176                 return;
 177         }
 178
 179         listbox->old_current_item = listbox->current_item;
 180         listbox->old_first_item = listbox->first_item;
 181
 182         OnMe = ui_mouse_on_gadget( (UI_GADGET *)listbox );
 183
 184
 185         if (listbox->scrollbar->moved )
 186         {
 187                 listbox->moved = 1;
 188
 189                 listbox->first_item = listbox->scrollbar->position;
 190
 191                 if (listbox->current_item<listbox->first_item)
 192                         listbox->current_item = listbox->first_item;
 193
 194                 if (listbox->current_item>(listbox->first_item+listbox->num_items_displayed-1))
 195                         listbox->current_item = listbox->first_item + listbox->num_items_displayed-1;
 196
 197         }
 198
 199         if (!B1_PRESSED )
 200                 listbox->dragging = 0;
 201
 202         if (B1_PRESSED && OnMe )
 203                 listbox->dragging = 1;
 204
 205         if ( CurWindow->keyboard_focus_gadget==(UI_GADGET *)listbox )
 206         {
 207                 if (keypress==KEY_ENTER)   {
 208                         listbox->selected_item = listbox->current_item;
 209                 }
 210
 211                 kf = 0;
 212
 213                 switch(keypress)
 214                 {
 215                         case (KEY_UP):
 216                                 listbox->current_item--;
 217                                 kf = 1;
 218                                 break;
 219                         case (KEY_DOWN):
 220                                 listbox->current_item++;
 221                                 kf = 1;
 222                                 break;
 223                         case (KEY_HOME):
 224                                 listbox->current_item=0;
 225                                 kf = 1;
 226                                 break;
 227                         case (KEY_END):
 228                                 listbox->current_item=listbox->num_items-1;
 229                                 kf = 1;
 230                                 break;
 231                         case (KEY_PAGEUP):
 232                                 listbox->current_item -= listbox->num_items_displayed;
 233                                 kf = 1;
 234                                 break;
 235                         case (KEY_PAGEDOWN):
 236                                 listbox->current_item += listbox->num_items_displayed;
 237                                 kf = 1;
 238                                 break;
 239                 }
 240
 241                 if (kf==1)
 242                 {
 243                         listbox->moved = 1;
 244
 245                         if (listbox->current_item<0)
 246                                 listbox->current_item=0;
 247
 248                         if (listbox->current_item>=listbox->num_items)
 249                                 listbox->current_item = listbox->num_items-1;
 250
 251                         if (listbox->current_item<listbox->first_item)
 252                                 listbox->first_item = listbox->current_item;
 253
 254                         if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
 255                                 listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
 256
 257                         if (listbox->num_items <= listbox->num_items_displayed )
 258                                 listbox->first_item = 0;
 259                         else
 260                         {
 261                                 oldfakepos = listbox->scrollbar->position;
 262                                 listbox->scrollbar->position = listbox->first_item;
 263
 264                                 listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
 265                                 listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
 266                                 listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
 267
 268                                 if (listbox->scrollbar->fake_position<0)
 269                                 {
 270                                         listbox->scrollbar->fake_position = 0;
 271                                 }
 272                                 if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
 273                                 {
 274                                         listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
 275                                 }
 276
 277                                 if (oldfakepos != listbox->scrollbar->position )
 278                                         listbox->scrollbar->status = 1;
 279                         }
 280                 }
 281         }
 282
 283
 284         if (selected_gadget==(UI_GADGET *)listbox)
 285         {
 286                 if (B1_PRESSED && listbox->dragging)
 287                 {
 288                         if (Mouse.y < listbox->y1)
 289                                 mitem = -1;
 290                         else
 291                                 mitem = (Mouse.y - listbox->y1)/listbox->textheight;
 292
 293                         if  ( (mitem < 0 ) && ( TICKER > listbox->last_scrolled+1) )
 294                         {
 295                                 listbox->current_item--;
 296                                 listbox->last_scrolled = TICKER;
 297                                 listbox->moved = 1;
 298                         }
 299
 300                         if ( ( mitem >= listbox->num_items_displayed ) &&
 301                                  ( TICKER > listbox->last_scrolled+1)         )
 302                         {
 303                                 listbox->current_item++;
 304                                 listbox->last_scrolled = TICKER;
 305                                 listbox->moved = 1;
 306                         }
 307
 308                         if ((mitem>=0) && (mitem<listbox->num_items_displayed))
 309                         {
 310                                 listbox->current_item = mitem+listbox->first_item;
 311                                 listbox->moved=1;
 312                         }
 313
 314                         if (listbox->current_item <0 )
 315                                 listbox->current_item = 0;
 316
 317                         if (listbox->current_item >= listbox->num_items )
 318                                 listbox->current_item = listbox->num_items-1;
 319
 320                         if (listbox->current_item<listbox->first_item)
 321                                 listbox->first_item = listbox->current_item;
 322
 323                         if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
 324                                 listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
 325
 326                         if (listbox->num_items <= listbox->num_items_displayed )
 327                                 listbox->first_item = 0;
 328                         else
 329                         {
 330                                 oldfakepos = listbox->scrollbar->position;
 331                                 listbox->scrollbar->position = listbox->first_item;
 332
 333                                 listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
 334                                 listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
 335                                 listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
 336
 337                                 if (listbox->scrollbar->fake_position<0)
 338                                 {
 339                                         listbox->scrollbar->fake_position = 0;
 340                                 }
 341                                 if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
 342                                 {
 343                                         listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
 344                                 }
 345
 346                                 if (oldfakepos != listbox->scrollbar->position )
 347                                         listbox->scrollbar->status = 1;
 348                         }
 349
 350                 }
 351
 352                 if (B1_DOUBLE_CLICKED )
 353                 {
 354                         listbox->selected_item = listbox->current_item;
 355                 }
 356
 357         }
 358
 359         ui_draw_listbox( listbox );
 360
 361 }
 362
 363 void ui_listbox_change( UI_WINDOW * wnd, UI_GADGET_LISTBOX * listbox, short numitems, char * list, int text_width )
 364 {
 365         int stop, start;
 366         UI_GADGET_SCROLLBAR * scrollbar;
 367
 368         wnd = wnd;
 369
 370         listbox->list = list;
 371         listbox->text_width = text_width;
 372         listbox->num_items = numitems;
 373         listbox->first_item = 0;
 374         listbox->current_item = -1;
 375         listbox->last_scrolled = TICKER;
 376         listbox->dragging = 0;
 377         listbox->selected_item = -1;
 378         listbox->status = 1;
 379         listbox->first_item = 0;
 380         listbox->current_item = listbox->old_current_item = 0;
 381         listbox->moved = 0;
 382
 383         scrollbar = listbox->scrollbar;
 384
 385         start=0;
 386         stop= numitems - listbox->num_items_displayed;
 387
 388         if (stop < start) stop = start;
 389
 390         scrollbar->horz = 0;
 391         scrollbar->start = start;
 392         scrollbar->stop = stop;
 393         scrollbar->fake_length = scrollbar->height;
 394         scrollbar->fake_position =  0;
 395         if (stop!=start)
 396                 scrollbar->fake_size = (listbox->num_items_displayed * scrollbar->height)/(stop-start+1+listbox->num_items_displayed);
 397         else
 398                 scrollbar->fake_size = scrollbar->height;
 399
 400         if (scrollbar->fake_size < 7) scrollbar->fake_size = 7;
 401         scrollbar->dragging = 0;
 402         scrollbar->moved=0;
 403         scrollbar->status=1;
 404
 405
 406 }