ui/listbox.c

   1 /* $Id: listbox.c,v 1.5 2005-01-25 19:44:27 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 1.5 2005-01-25 19:44:27 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 #include "timer.h"
  31
  32 void ui_draw_listbox( UI_GADGET_LISTBOX * listbox )
  33 {
  34         int i, x, y, stop;
  35         int w, h,  aw;
  36
  37         //if (listbox->current_item<0)
  38         //    listbox->current_item=0;
  39         //if (listbox->current_item>=listbox->num_items)
  40         //    listbox->current_item = listbox->num_items-1;
  41         //if (listbox->first_item<0)
  42         //   listbox->first_item=0;
  43         //if (listbox->first_item>(listbox->num_items-listbox->num_items_displayed))
  44         //    listbox->first_item=(listbox->num_items-listbox->num_items_displayed);
  45
  46         if ((listbox->status!=1) && !listbox->moved )
  47                 return;
  48
  49         stop = listbox->first_item+listbox->num_items_displayed;
  50         if (stop>listbox->num_items) stop = listbox->num_items;
  51
  52         listbox->status = 0;
  53
  54         x = y = 0;
  55         ui_mouse_hide();
  56         gr_set_current_canvas( listbox->canvas );
  57
  58         for (i= listbox->first_item; i< stop; i++ )
  59         {
  60                 if (i !=listbox->current_item)
  61                 {
  62                         if ((listbox->current_item == -1) && (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox) && (i == listbox->first_item)  )
  63                                 gr_set_fontcolor( CRED, CBLACK );
  64                         else
  65                                 gr_set_fontcolor( CWHITE, CBLACK );
  66                 }
  67                 else
  68                 {
  69                         if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox)
  70                                 gr_set_fontcolor( CRED, CGREY );
  71                         else
  72                                 gr_set_fontcolor( CBLACK, CGREY );
  73                 }
  74                 gr_string( x+2, y, listbox->list+i*listbox->text_width );
  75                 gr_get_string_size(listbox->list+i*listbox->text_width, &w, &h,&aw );
  76
  77                 if (i==listbox->current_item)
  78                         gr_setcolor( CGREY );
  79                 else
  80                         gr_setcolor( CBLACK );
  81
  82                 gr_rect( x+w+2, y, listbox->width-1, y+h-1 );
  83                 gr_rect( x, y, x+1, y+h-1 );
  84
  85                 y += h;
  86         }
  87
  88         if (stop < listbox->num_items_displayed-1 )
  89         {
  90                 gr_setcolor(CBLACK);
  91                 gr_rect( x, y, listbox->width-1, listbox->height-1 );
  92         }
  93
  94         //gr_ubox( -1, -1, listbox->width, listbox->height);
  95         ui_mouse_show();
  96
  97 }
  98
  99
 100 void gr_draw_sunken_border( short x1, short y1, short x2, short y2 )
 101 {
 102
 103         gr_setcolor( CGREY );
 104         Hline( x1-1, x2+1, y1-1);
 105         Vline( y1-1, y2+1, x1-1);
 106
 107         gr_setcolor( CBRIGHT );
 108         Hline( x1-1, x2+1, y2+1);
 109         Vline( y1, y2+1, x2+1);
 110
 111 }
 112
 113
 114 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 )
 115 {
 116         int tw, th, taw, i;
 117
 118         UI_GADGET_LISTBOX * listbox;
 119
 120         gr_get_string_size("*", &tw, &th, &taw );
 121
 122         i = h / th;
 123         h = i * th;
 124
 125         listbox = (UI_GADGET_LISTBOX *)ui_gadget_add( wnd, 2, x, y, x+w-1, y+h-1 );
 126
 127         listbox->list = list;
 128         listbox->text_width = text_width;
 129         listbox->width = w;
 130         listbox->height = h;
 131         listbox->num_items = numitems;
 132         listbox->num_items_displayed = i;
 133         listbox->first_item = 0;
 134         listbox->current_item = -1;
 135         listbox->last_scrolled = 0;
 136         listbox->textheight = th;
 137         listbox->dragging = 0;
 138         listbox->selected_item = -1;
 139         listbox->moved = 1;
 140
 141         listbox->scrollbar = ui_add_gadget_scrollbar( wnd, x+w+3, y, 0, h, 0, numitems-i, 0, i );
 142         listbox->scrollbar->parent = (UI_GADGET *)listbox;
 143
 144         gr_set_current_canvas( listbox->canvas );
 145
 146         gr_setcolor(CBLACK);
 147         gr_rect( 0, 0, w-1, h-1);
 148
 149         gr_draw_sunken_border( -2, -2, w+listbox->scrollbar->width+4, h+1);
 150
 151         return listbox;
 152
 153 }
 154
 155 void ui_listbox_do( UI_GADGET_LISTBOX * listbox, int keypress )
 156 {
 157         int OnMe, mitem, oldfakepos, kf;
 158
 159         listbox->selected_item = -1;
 160
 161         listbox->moved = 0;
 162
 163         if (listbox->num_items < 1 ) {
 164                 listbox->current_item = -1;
 165                 listbox->first_item = 0;
 166                 listbox->old_current_item = listbox->current_item;
 167                 listbox->old_first_item = listbox->first_item;
 168                 ui_draw_listbox( listbox );
 169
 170                 if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)listbox)
 171                 {
 172                         CurWindow->keyboard_focus_gadget = ui_gadget_get_next((UI_GADGET *)listbox);
 173                 }
 174
 175                 return;
 176         }
 177
 178         listbox->old_current_item = listbox->current_item;
 179         listbox->old_first_item = listbox->first_item;
 180
 181         OnMe = ui_mouse_on_gadget( (UI_GADGET *)listbox );
 182
 183
 184         if (listbox->scrollbar->moved )
 185         {
 186                 listbox->moved = 1;
 187
 188                 listbox->first_item = listbox->scrollbar->position;
 189
 190                 if (listbox->current_item<listbox->first_item)
 191                         listbox->current_item = listbox->first_item;
 192
 193                 if (listbox->current_item>(listbox->first_item+listbox->num_items_displayed-1))
 194                         listbox->current_item = listbox->first_item + listbox->num_items_displayed-1;
 195
 196         }
 197
 198         if (!B1_PRESSED )
 199                 listbox->dragging = 0;
 200
 201         if (B1_PRESSED && OnMe )
 202                 listbox->dragging = 1;
 203
 204         if ( CurWindow->keyboard_focus_gadget==(UI_GADGET *)listbox )
 205         {
 206                 if (keypress==KEY_ENTER)   {
 207                         listbox->selected_item = listbox->current_item;
 208                 }
 209
 210                 kf = 0;
 211
 212                 switch(keypress)
 213                 {
 214                         case (KEY_UP):
 215                                 listbox->current_item--;
 216                                 kf = 1;
 217                                 break;
 218                         case (KEY_DOWN):
 219                                 listbox->current_item++;
 220                                 kf = 1;
 221                                 break;
 222                         case (KEY_HOME):
 223                                 listbox->current_item=0;
 224                                 kf = 1;
 225                                 break;
 226                         case (KEY_END):
 227                                 listbox->current_item=listbox->num_items-1;
 228                                 kf = 1;
 229                                 break;
 230                         case (KEY_PAGEUP):
 231                                 listbox->current_item -= listbox->num_items_displayed;
 232                                 kf = 1;
 233                                 break;
 234                         case (KEY_PAGEDOWN):
 235                                 listbox->current_item += listbox->num_items_displayed;
 236                                 kf = 1;
 237                                 break;
 238                 }
 239
 240                 if (kf==1)
 241                 {
 242                         listbox->moved = 1;
 243
 244                         if (listbox->current_item<0)
 245                                 listbox->current_item=0;
 246
 247                         if (listbox->current_item>=listbox->num_items)
 248                                 listbox->current_item = listbox->num_items-1;
 249
 250                         if (listbox->current_item<listbox->first_item)
 251                                 listbox->first_item = listbox->current_item;
 252
 253                         if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
 254                                 listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
 255
 256                         if (listbox->num_items <= listbox->num_items_displayed )
 257                                 listbox->first_item = 0;
 258                         else
 259                         {
 260                                 oldfakepos = listbox->scrollbar->position;
 261                                 listbox->scrollbar->position = listbox->first_item;
 262
 263                                 listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
 264                                 listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
 265                                 listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
 266
 267                                 if (listbox->scrollbar->fake_position<0)
 268                                 {
 269                                         listbox->scrollbar->fake_position = 0;
 270                                 }
 271                                 if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
 272                                 {
 273                                         listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
 274                                 }
 275
 276                                 if (oldfakepos != listbox->scrollbar->position )
 277                                         listbox->scrollbar->status = 1;
 278                         }
 279                 }
 280         }
 281
 282
 283         if (selected_gadget==(UI_GADGET *)listbox)
 284         {
 285                 if (B1_PRESSED && listbox->dragging)
 286                 {
 287                         if (Mouse.y < listbox->y1)
 288                                 mitem = -1;
 289                         else
 290                                 mitem = (Mouse.y - listbox->y1)/listbox->textheight;
 291
 292                         if ((mitem < 0) && (timer_get_fixed_seconds() > listbox->last_scrolled + 1))
 293                         {
 294                                 listbox->current_item--;
 295                                 listbox->last_scrolled = timer_get_fixed_seconds();
 296                                 listbox->moved = 1;
 297                         }
 298
 299                         if ((mitem >= listbox->num_items_displayed) &&
 300                                  (timer_get_fixed_seconds() > listbox->last_scrolled + 1))
 301                         {
 302                                 listbox->current_item++;
 303                                 listbox->last_scrolled = timer_get_fixed_seconds();
 304                                 listbox->moved = 1;
 305                         }
 306
 307                         if ((mitem>=0) && (mitem<listbox->num_items_displayed))
 308                         {
 309                                 listbox->current_item = mitem+listbox->first_item;
 310                                 listbox->moved=1;
 311                         }
 312
 313                         if (listbox->current_item <0 )
 314                                 listbox->current_item = 0;
 315
 316                         if (listbox->current_item >= listbox->num_items )
 317                                 listbox->current_item = listbox->num_items-1;
 318
 319                         if (listbox->current_item<listbox->first_item)
 320                                 listbox->first_item = listbox->current_item;
 321
 322                         if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
 323                                 listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
 324
 325                         if (listbox->num_items <= listbox->num_items_displayed )
 326                                 listbox->first_item = 0;
 327                         else
 328                         {
 329                                 oldfakepos = listbox->scrollbar->position;
 330                                 listbox->scrollbar->position = listbox->first_item;
 331
 332                                 listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
 333                                 listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
 334                                 listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
 335
 336                                 if (listbox->scrollbar->fake_position<0)
 337                                 {
 338                                         listbox->scrollbar->fake_position = 0;
 339                                 }
 340                                 if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
 341                                 {
 342                                         listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
 343                                 }
 344
 345                                 if (oldfakepos != listbox->scrollbar->position )
 346                                         listbox->scrollbar->status = 1;
 347                         }
 348
 349                 }
 350
 351                 if (B1_DOUBLE_CLICKED )
 352                 {
 353                         listbox->selected_item = listbox->current_item;
 354                 }
 355
 356         }
 357
 358         ui_draw_listbox( listbox );
 359
 360 }
 361
 362 void ui_listbox_change( UI_WINDOW * wnd, UI_GADGET_LISTBOX * listbox, short numitems, char * list, int text_width )
 363 {
 364         int stop, start;
 365         UI_GADGET_SCROLLBAR * scrollbar;
 366
 367         wnd = wnd;
 368
 369         listbox->list = list;
 370         listbox->text_width = text_width;
 371         listbox->num_items = numitems;
 372         listbox->first_item = 0;
 373         listbox->current_item = -1;
 374         listbox->last_scrolled = timer_get_fixed_seconds();
 375         listbox->dragging = 0;
 376         listbox->selected_item = -1;
 377         listbox->status = 1;
 378         listbox->first_item = 0;
 379         listbox->current_item = listbox->old_current_item = 0;
 380         listbox->moved = 0;
 381
 382         scrollbar = listbox->scrollbar;
 383
 384         start=0;
 385         stop= numitems - listbox->num_items_displayed;
 386
 387         if (stop < start) stop = start;
 388
 389         scrollbar->horz = 0;
 390         scrollbar->start = start;
 391         scrollbar->stop = stop;
 392         scrollbar->fake_length = scrollbar->height;
 393         scrollbar->fake_position =  0;
 394         if (stop!=start)
 395                 scrollbar->fake_size = (listbox->num_items_displayed * scrollbar->height)/(stop-start+1+listbox->num_items_displayed);
 396         else
 397                 scrollbar->fake_size = scrollbar->height;
 398
 399         if (scrollbar->fake_size < 7) scrollbar->fake_size = 7;
 400         scrollbar->dragging = 0;
 401         scrollbar->moved=0;
 402         scrollbar->status=1;
 403
 404
 405 }