unused/ui/listbox.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 #pragma off (unreferenced)
  15 static char rcsid[] = "$Id: listbox.c,v 1.1.1.1 2001-01-19 03:30:14 bradleyb Exp $";
  16 #pragma on (unreferenced)
  17 #include <stdlib.h>
  18
  19 #include "fix.h"
  20 #include "types.h"
  21 #include "gr.h"
  22 #include "ui.h"
  23 #include "key.h"
  24
  25 #define TICKER (*(volatile int *)0x46C)
  26
  27 void ui_draw_listbox( UI_GADGET_LISTBOX * listbox )
  28 {
  29         int i, x, y, stop;
  30         int w, h,  aw;
  31
  32         //if (listbox->current_item<0)
  33         //    listbox->current_item=0;
  34         //if (listbox->current_item>=listbox->num_items)
  35         //    listbox->current_item = listbox->num_items-1;
  36         //if (listbox->first_item<0)
  37         //   listbox->first_item=0;
  38         //if (listbox->first_item>(listbox->num_items-listbox->num_items_displayed))
  39         //    listbox->first_item=(listbox->num_items-listbox->num_items_displayed);
  40
  41         if ((listbox->status!=1) && !listbox->moved )
  42                 return;
  43
  44         stop = listbox->first_item+listbox->num_items_displayed;
  45         if (stop>listbox->num_items) stop = listbox->num_items;
  46
  47         listbox->status = 0;
  48
  49         x = y = 0;
  50         ui_mouse_hide();
  51         gr_set_current_canvas( listbox->canvas );
  52
  53         for (i= listbox->first_item; i< stop; i++ )
  54         {
  55                 if (i !=listbox->current_item)
  56                 {
  57                         if ((listbox->current_item == -1) && (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox) && (i == listbox->first_item)  )
  58                                 gr_set_fontcolor( CRED, CBLACK );
  59                         else
  60                                 gr_set_fontcolor( CWHITE, CBLACK );
  61                 }
  62                 else
  63                 {
  64                         if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox)
  65                                 gr_set_fontcolor( CRED, CGREY );
  66                         else
  67                                 gr_set_fontcolor( CBLACK, CGREY );
  68                 }
  69                 gr_string( x+2, y, listbox->list+i*listbox->text_width );
  70                 gr_get_string_size(listbox->list+i*listbox->text_width, &w, &h,&aw );
  71
  72                 if (i==listbox->current_item)
  73                         gr_setcolor( CGREY );
  74                 else
  75                         gr_setcolor( CBLACK );
  76
  77                 gr_rect( x+w+2, y, listbox->width-1, y+h-1 );
  78                 gr_rect( x, y, x+1, y+h-1 );
  79
  80                 y += h;
  81         }
  82
  83         if (stop < listbox->num_items_displayed-1 )
  84         {
  85                 gr_setcolor(CBLACK);
  86                 gr_rect( x, y, listbox->width-1, listbox->height-1 );
  87         }
  88
  89         //gr_ubox( -1, -1, listbox->width, listbox->height);
  90         ui_mouse_show();
  91
  92 }
  93
  94
  95 void gr_draw_sunken_border( short x1, short y1, short x2, short y2 )
  96 {
  97
  98         gr_setcolor( CGREY );
  99         Hline( x1-1, x2+1, y1-1);
 100         Vline( y1-1, y2+1, x1-1);
 101
 102         gr_setcolor( CBRIGHT );
 103         Hline( x1-1, x2+1, y2+1);
 104         Vline( y1, y2+1, x2+1);
 105
 106 }
 107
 108
 109 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 )
 110 {
 111         int tw, th, taw, i;
 112
 113         UI_GADGET_LISTBOX * listbox;
 114
 115         gr_get_string_size("*", &tw, &th, &taw );
 116
 117         i = h / th;
 118         h = i * th;
 119
 120         listbox = (UI_GADGET_LISTBOX *)ui_gadget_add( wnd, 2, x, y, x+w-1, y+h-1 );
 121
 122         listbox->list = list;
 123         listbox->text_width = text_width;
 124         listbox->width = w;
 125         listbox->height = h;
 126         listbox->num_items = numitems;
 127         listbox->num_items_displayed = i;
 128         listbox->first_item = 0;
 129         listbox->current_item = -1;
 130         listbox->last_scrolled = 0;
 131         listbox->textheight = th;
 132         listbox->dragging = 0;
 133         listbox->selected_item = -1;
 134         listbox->moved = 1;
 135
 136         listbox->scrollbar = ui_add_gadget_scrollbar( wnd, x+w+3, y, 0, h, 0, numitems-i, 0, i );
 137         listbox->scrollbar->parent = (UI_GADGET *)listbox;
 138
 139         gr_set_current_canvas( listbox->canvas );
 140
 141         gr_setcolor(CBLACK);
 142         gr_rect( 0, 0, w-1, h-1);
 143
 144         gr_draw_sunken_border( -2, -2, w+listbox->scrollbar->width+4, h+1);
 145
 146         return listbox;
 147
 148 }
 149
 150 void ui_listbox_do( UI_GADGET_LISTBOX * listbox, int keypress )
 151 {
 152         int OnMe, mitem, oldfakepos, kf;
 153
 154         listbox->selected_item = -1;
 155
 156         listbox->moved = 0;
 157
 158         if (listbox->num_items < 1 ) {
 159                 listbox->current_item = -1;
 160                 listbox->first_item = 0;
 161                 listbox->old_current_item = listbox->current_item;
 162                 listbox->old_first_item = listbox->first_item;
 163                 ui_draw_listbox( listbox );
 164
 165                 if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox)
 166                 {
 167                         CurWindow->keyboard_focus_gadget = ui_gadget_get_next((UI_GADGET *)listbox);
 168                 }
 169
 170                 return;
 171         }
 172
 173         listbox->old_current_item = listbox->current_item;
 174         listbox->old_first_item = listbox->first_item;
 175
 176         OnMe = ui_mouse_on_gadget( (UI_GADGET *)listbox );
 177
 178
 179         if (listbox->scrollbar->moved )
 180         {
 181                 listbox->moved = 1;
 182
 183                 listbox->first_item = listbox->scrollbar->position;
 184
 185                 if (listbox->current_item<listbox->first_item)
 186                         listbox->current_item = listbox->first_item;
 187
 188                 if (listbox->current_item>(listbox->first_item+listbox->num_items_displayed-1))
 189                         listbox->current_item = listbox->first_item + listbox->num_items_displayed-1;
 190
 191         }
 192
 193         if (!B1_PRESSED )
 194                 listbox->dragging = 0;
 195
 196         if (B1_PRESSED && OnMe )
 197                 listbox->dragging = 1;
 198
 199         if ( CurWindow->keyboard_focus_gadget==(UI_GADGET *)listbox )
 200         {
 201                 if (keypress==KEY_ENTER)   {
 202                         listbox->selected_item = listbox->current_item;
 203                 }
 204
 205                 kf = 0;
 206
 207                 switch(keypress)
 208                 {
 209                         case (KEY_UP):
 210                                 listbox->current_item--;
 211                                 kf = 1;
 212                                 break;
 213                         case (KEY_DOWN):
 214                                 listbox->current_item++;
 215                                 kf = 1;
 216                                 break;
 217                         case (KEY_HOME):
 218                                 listbox->current_item=0;
 219                                 kf = 1;
 220                                 break;
 221                         case (KEY_END):
 222                                 listbox->current_item=listbox->num_items-1;
 223                                 kf = 1;
 224                                 break;
 225                         case (KEY_PAGEUP):
 226                                 listbox->current_item -= listbox->num_items_displayed;
 227                                 kf = 1;
 228                                 break;
 229                         case (KEY_PAGEDOWN):
 230                                 listbox->current_item += listbox->num_items_displayed;
 231                                 kf = 1;
 232                                 break;
 233                 }
 234
 235                 if (kf==1)
 236                 {
 237                         listbox->moved = 1;
 238
 239                         if (listbox->current_item<0)
 240                                 listbox->current_item=0;
 241
 242                         if (listbox->current_item>=listbox->num_items)
 243                                 listbox->current_item = listbox->num_items-1;
 244
 245                         if (listbox->current_item<listbox->first_item)
 246                                 listbox->first_item = listbox->current_item;
 247
 248                         if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
 249                                 listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
 250
 251                         if (listbox->num_items <= listbox->num_items_displayed )
 252                                 listbox->first_item = 0;
 253                         else
 254                         {
 255                                 oldfakepos = listbox->scrollbar->position;
 256                                 listbox->scrollbar->position = listbox->first_item;
 257
 258                                 listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
 259                                 listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
 260                                 listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
 261
 262                                 if (listbox->scrollbar->fake_position<0)
 263                                 {
 264                                         listbox->scrollbar->fake_position = 0;
 265                                 }
 266                                 if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
 267                                 {
 268                                         listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
 269                                 }
 270
 271                                 if (oldfakepos != listbox->scrollbar->position )
 272                                         listbox->scrollbar->status = 1;
 273                         }
 274                 }
 275         }
 276
 277
 278         if (selected_gadget==(UI_GADGET *)listbox)
 279         {
 280                 if (B1_PRESSED && listbox->dragging)
 281                 {
 282                         if (Mouse.y < listbox->y1)
 283                                 mitem = -1;
 284                         else
 285                                 mitem = (Mouse.y - listbox->y1)/listbox->textheight;
 286
 287                         if  ( (mitem < 0 ) && ( TICKER > listbox->last_scrolled+1) )
 288                         {
 289                                 listbox->current_item--;
 290                                 listbox->last_scrolled = TICKER;
 291                                 listbox->moved = 1;
 292                         }
 293
 294                         if ( ( mitem >= listbox->num_items_displayed ) &&
 295                                  ( TICKER > listbox->last_scrolled+1)         )
 296                         {
 297                                 listbox->current_item++;
 298                                 listbox->last_scrolled = TICKER;
 299                                 listbox->moved = 1;
 300                         }
 301
 302                         if ((mitem>=0) && (mitem<listbox->num_items_displayed))
 303                         {
 304                                 listbox->current_item = mitem+listbox->first_item;
 305                                 listbox->moved=1;
 306                         }
 307
 308                         if (listbox->current_item <0 )
 309                                 listbox->current_item = 0;
 310
 311                         if (listbox->current_item >= listbox->num_items )
 312                                 listbox->current_item = listbox->num_items-1;
 313
 314                         if (listbox->current_item<listbox->first_item)
 315                                 listbox->first_item = listbox->current_item;
 316
 317                         if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
 318                                 listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
 319
 320                         if (listbox->num_items <= listbox->num_items_displayed )
 321                                 listbox->first_item = 0;
 322                         else
 323                         {
 324                                 oldfakepos = listbox->scrollbar->position;
 325                                 listbox->scrollbar->position = listbox->first_item;
 326
 327                                 listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
 328                                 listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
 329                                 listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
 330
 331                                 if (listbox->scrollbar->fake_position<0)
 332                                 {
 333                                         listbox->scrollbar->fake_position = 0;
 334                                 }
 335                                 if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
 336                                 {
 337                                         listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
 338                                 }
 339
 340                                 if (oldfakepos != listbox->scrollbar->position )
 341                                         listbox->scrollbar->status = 1;
 342                         }
 343
 344                 }
 345
 346                 if (B1_DOUBLE_CLICKED )
 347                 {
 348                         listbox->selected_item = listbox->current_item;
 349                 }
 350
 351         }
 352
 353         ui_draw_listbox( listbox );
 354
 355 }
 356
 357 void ui_listbox_change( UI_WINDOW * wnd, UI_GADGET_LISTBOX * listbox, short numitems, char * list, int text_width )
 358 {
 359         int stop, start;
 360         UI_GADGET_SCROLLBAR * scrollbar;
 361
 362         wnd = wnd;
 363
 364         listbox->list = list;
 365         listbox->text_width = text_width;
 366         listbox->num_items = numitems;
 367         listbox->first_item = 0;
 368         listbox->current_item = -1;
 369         listbox->last_scrolled = TICKER;
 370         listbox->dragging = 0;
 371         listbox->selected_item = -1;
 372         listbox->status = 1;
 373         listbox->first_item = 0;
 374         listbox->current_item = listbox->old_current_item = 0;
 375         listbox->moved = 0;
 376
 377         scrollbar = listbox->scrollbar;
 378
 379         start=0;
 380         stop= numitems - listbox->num_items_displayed;
 381
 382         if (stop < start) stop = start;
 383
 384         scrollbar->horz = 0;
 385         scrollbar->start = start;
 386         scrollbar->stop = stop;
 387         scrollbar->fake_length = scrollbar->height;
 388         scrollbar->fake_position =  0;
 389         if (stop!=start)
 390                 scrollbar->fake_size = (listbox->num_items_displayed * scrollbar->height)/(stop-start+1+listbox->num_items_displayed);
 391         else
 392                 scrollbar->fake_size = scrollbar->height;
 393
 394         if (scrollbar->fake_size < 7) scrollbar->fake_size = 7;
 395         scrollbar->dragging = 0;
 396         scrollbar->moved=0;
 397         scrollbar->status=1;
 398
 399
 400 }