mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Steel/c/ibicon

   1 /*
   2  * ibicon
   3  *
   4  * proper icon bar mangement (multiple icons, etc.)
   5  *
   6  * © 1993-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Steel library.
  12  *
  13  * Steel is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Steel is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with Steel.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include "wimp.h"
  29 #include "wimpt.h"
  30 #include "os.h"
  31 #include "swis.h"
  32 #include "bbc.h"
  33 #include "win.h"
  34 #include "werr.h"
  35 #include "ibicon.h"
  36 #include "msgs.h"
  37 #include "event.h"
  38 #include "mem.h"
  39 #include "swiv.h"
  40 #include <string.h>
  41 #include <stdio.h>
  42
  43 #include "dll.h"
  44
  45 #ifndef _dll_NODLL
  46   extern void _dllEntry(ibicon__events)(wimp_eventstr *e,void *handle);
  47   extern menu _dllEntry(ibicon__menumaker)(void *handle);
  48   extern void _dllEntry(ibicon__menuhandler)(int hits[],void *handle);
  49   extern void _dllEntry(ibicon__menuhelphandler)(int hits[],void *handle);
  50 #endif
  51
  52 typedef struct ibicon__ibiconstr
  53 {
  54   struct ibicon__ibiconstr *next;
  55   struct ibicon__ibiconstr *prev;
  56   wimp_i icon;
  57   char *data;
  58   char *valid;
  59   menu mnu;
  60   event_menu_maker maker;
  61   menu_selectProc menusel;
  62   menu_helpProc menuhelp;
  63   void *menuHandle;
  64   ibicon_handler handler;
  65   void *handle;
  66   ibicon_rawHandler raw;
  67   void *rawHandle;
  68 }
  69 ibicon__ibiconstr;
  70
  71 static ibicon ibicon__anchor;
  72 static BOOL ibicon__eventHandler;        /* Do we have an event handler?   */
  73 static ibicon ibicon__menuicon;          /* The last icon to open a menu   */
  74 static int ibicon__priority;             /* Icon priorities (RISC OS 3)    */
  75
  76 /*
  77  * os_error *ibicon__spriteOp
  78  * (
  79  *   int op,
  80  *   sprite_area *a,
  81  *   char *name,
  82  *   _kernel_swi_regs *r
  83  * )
  84  *
  85  * Use
  86  *  Does an OS_SpriteOp call.  It's designed for calls that return more than
  87  *  they receive.
  88  *
  89  * Parameters
  90  *  int op == the operation number to perform
  91  *  sprite_area *a == the sprite area to do the op on.  May be 1 for the
  92  *    WIMP area or 0 for the system area
  93  *  char *name == the name of the sprite
  94  *  os_regset *r == a regiser set to return inforation in
  95  *
  96  * Returns
  97  *  An error block if anything went wrong
  98  */
  99
 100 static os_error *ibicon__spriteOp
 101 (
 102   int op,
 103   sprite_area *a,
 104   char *name,
 105   os_regset *r
 106 )
 107 {
 108   int swinum;
 109   if ((int)a==1)
 110     swinum=XWimp_SpriteOp;
 111   else
 112   {
 113     swinum=XOS_SpriteOp;
 114     if (a!=0)
 115       op+=256;
 116   }
 117   r->r[0]=op;
 118   r->r[1]=(int)a;
 119   r->r[2]=(int)name;
 120   return (os_swix(swinum,r));
 121 }
 122
 123 /*
 124  * void ibicon__spriteSize(char *name,sprite_area *a,wimp_box *b,BOOL centre)
 125  *
 126  * Use
 127  *  Returns the size of the sprite specified.  If requested, it also
 128  *  centres the result given within a 68 OS unit vertical area.
 129  *
 130  * Parameters
 131  *  char *name == the name of the sprite of which to return the size
 132  *  sprite_area *a == the sprite area (same conventions as above)
 133  *  wimp_box *b == a box structure to fill in
 134  *  BOOL centre == whether to centre the icon vertically
 135  */
 136
 137 static void ibicon__spriteSize
 138 (
 139   char *name,
 140   sprite_area *a,
 141   wimp_box *b,
 142   BOOL centre
 143 )
 144 {
 145   os_regset r;
 146   int height;
 147   b->x0=0;
 148   wimpt_noerr(ibicon__spriteOp(40,a,name,&r));
 149   b->x1=r.r[3]<<bbc_modevar(r.r[6],bbc_XEigFactor);
 150   height=r.r[4]<<bbc_modevar(r.r[6],bbc_YEigFactor);
 151   if (centre)
 152   {
 153     b->y0=(68-height)>>1;
 154     b->y1=68-b->y0;
 155   }
 156   else
 157   {
 158     b->y0=0;
 159     b->y1=height;
 160   }
 161 }
 162
 163 /*
 164  * ibicon ibicon_find(wimp_i icon)
 165  *
 166  * Use
 167  *  Return the ibicon handle of an icon.
 168  *
 169  * Parameters
 170  *  wimp_i icon == the icon to find
 171  */
 172
 173 ibicon ibicon_find(wimp_i icon)
 174 {
 175   ibicon i;
 176   for (i=ibicon__anchor;i;i=i->next)
 177   {
 178     if (i->icon==icon)
 179       return (i);
 180     if (i->icon>icon)
 181       return (0);
 182   }
 183   return (0);
 184 }
 185
 186 /*
 187  * wimp_i ibicon_syshandle(ibicon i)
 188  *
 189  * Use
 190  *  Returns the low-level WIMP handle for the icon concerned.
 191  *
 192  * Parameters
 193  *  ibicon i == the icon whose handle is desired
 194  *
 195  * Returns
 196  *  The WIMP icon handle for the icon
 197  */
 198
 199 wimp_i ibicon_syshandle(ibicon i)
 200 {
 201   return (i->icon);
 202 }
 203
 204 /*
 205  * void ibicon__menuhandler(int hit[],void *handle)
 206  *
 207  * Use
 208  *  Handles clicks on icon bar menus.  It acts an event_menu_proc and passes
 209  *  the information on the relevant icon.
 210  *
 211  * Parameters
 212  *  int hit[] == the hit string to be processed.
 213  *  void *handle == not worth the effort of worrying about
 214  */
 215
 216 _dll_static void ibicon__menuhandler(int hit[],void *handle)
 217 {
 218   handle=handle;
 219   if (ibicon__menuicon)
 220   {
 221     if (ibicon__menuicon->menusel)
 222       (ibicon__menuicon->menusel)(hit,ibicon__menuicon->menuHandle);
 223   }
 224 }
 225
 226 /*
 227  * void ibicon__menuhelphandler(int hit[],void *handle)
 228  *
 229  * Use
 230  *  Handles help request for icon bar menus.  It acts a menu_helpProc or
 231  *  whatever and passes the information on the relevant icon.
 232  *
 233  * Parameters
 234  *  int hit[] == the hit string to be processed.
 235  *  void *handle == not worth the effort of worrying about
 236  */
 237
 238 _dll_static void ibicon__menuhelphandler(int hit[],void *handle)
 239 {
 240   handle=handle;
 241   if (ibicon__menuicon)
 242   {
 243     if (ibicon__menuicon->menuhelp)
 244       (ibicon__menuicon->menuhelp)(hit,ibicon__menuicon->menuHandle);
 245   }
 246 }
 247
 248 /*
 249  * menu ibicon__menumaker(void *handle)
 250  *
 251  * Use
 252  *  Handles menus and things for the icon bar.  Acts as an event_menu_maker
 253  *  and passes the request on to the icon concerned.
 254  *
 255  * Parameters
 256  *  void *handle == nothing worth worrying about
 257  *
 258  * Returns
 259  *  The menu to display
 260  */
 261
 262 _dll_static menu ibicon__menumaker(void *handle)
 263 {
 264   wimp_eventstr *e=wimpt_last_event();
 265   handle=handle;
 266   if (e->e==wimp_EBUT)
 267     ibicon__menuicon=ibicon_find(e->data.but.m.i);
 268   if (ibicon__menuicon)
 269   {
 270     if (ibicon__menuicon->mnu)
 271       return (ibicon__menuicon->mnu);
 272     else if (ibicon__menuicon->maker)
 273       return ((ibicon__menuicon->maker)(ibicon__menuicon->menuHandle));
 274   }
 275   return (0);  /* menu is dead - icon disappeared */
 276 }
 277
 278 /*
 279  * void ibicon__events(wimp_eventstr *e,void *handle)
 280  *
 281  * Purpose
 282  *  Event handler installed for both win_ICONBAR and win_ICONBARLOAD.
 283  *
 284  * Parameters
 285  *  wimp_eventstr *e == the event
 286  *  void *handle == nothing interesting
 287  */
 288
 289 _dll_static void ibicon__events(wimp_eventstr *e,void *handle)
 290 {
 291   wimp_i icn=-1;
 292   ibicon i;
 293   ibicon_eventType type=ibicon_NOTHING;
 294   handle=handle;
 295   switch (e->e)
 296   {
 297     case wimp_EBUT:
 298       icn=e->data.but.m.i;
 299       switch (e->data.but.m.bbits)
 300       {
 301         case wimp_BLEFT:
 302           type=ibicon_LEFTCLICK;
 303           break;
 304         case wimp_BRIGHT:
 305           type=ibicon_RIGHTCLICK;
 306           break;
 307       }
 308       break;
 309     case wimp_ESEND:
 310     case wimp_ESENDWANTACK:
 311       switch (e->data.msg.hdr.action)
 312       {
 313         case wimp_MDATASAVE:
 314           type=ibicon_SAVE;
 315           icn=e->data.msg.data.datasave.i;
 316           break;
 317         case wimp_MDATALOAD:
 318           type=ibicon_LOAD;
 319           icn=e->data.msg.data.dataload.i;
 320           break;
 321         case wimp_MHELPREQUEST:
 322           type=ibicon_HELP;
 323           icn=e->data.msg.data.helprequest.m.i;
 324           break;
 325       }
 326   }
 327   if (i=ibicon_find(icn),!i)
 328     return;
 329   if (i->raw)
 330   {
 331     if ((i->raw)(i,e,i->rawHandle))
 332       type=ibicon_NOTHING;
 333   }
 334   if (type!=ibicon_NOTHING)
 335   {
 336     if (i->handler)
 337       (i->handler)(i,type,i->handle);
 338   }
 339 }
 340
 341 /*
 342  * void ibicon_setPriority(int priority)
 343  *
 344  * Use
 345  *  Sets the priority with which to create icons under RISC OS 3.
 346  *
 347  * Parameters
 348  *  int priority == the new setting
 349  */
 350
 351 void ibicon_setPriority(int priority)
 352 {
 353   ibicon__priority=priority;
 354 }
 355
 356 /*
 357  * ibicon ibicon_create
 358  * (
 359  *   int where,
 360  *   char *spritename,
 361  *   sprite_area *sprarea,
 362  *   char *text,
 363  *   int maxtext
 364  * )
 365  *
 366  * Use
 367  *  Creates an icon in the icon bar.  Where is up to you.  Specify a
 368  *  sprite-only icon by passing 0 for text.  Use the macros to define where
 369  *  and what area you want the sprite from.
 370  *
 371  * Parameters
 372  *  int where == what part of the icon bar you want to put the icon in.
 373  *    Macros are defined for the RISC OS 2 possibilities.  Wait for the
 374  *    RISC OS 3 macros, or just pass a window handle.
 375  *  char *spritename == the name of the sprite to display
 376  *  sprite_area *sprarea == the area from which the sprite area comes.  Use
 377  *    the macros provided for odd things like the WIMP area.  If you have
 378  *    text as well, then this will be ignored anyway.
 379  *  char *text == the text for the icon.  May be a NULL pointer, for no
 380  *    text.
 381  *  int maxtext == the max length the text entry can be.  If 0 then the
 382  *    length of the text given will be used.
 383  *
 384  * Returns
 385  *  A handle to the icon if successful, or 0 if not.
 386  */
 387
 388 ibicon ibicon_create
 389 (
 390   int where,
 391   char *spritename,
 392   sprite_area *sprarea,
 393   char *text,
 394   int maxtext
 395 )
 396 {
 397   wimp_icreate i;
 398   ibicon new=mem_alloc(sizeof(ibicon__ibiconstr));
 399   ibicon c;
 400   if (!new)
 401   {
 402     werr(FALSE,msgs_lookup("ibicnNEM:Not enough memory for icon."));
 403     return (0);
 404   }
 405   if (!ibicon__eventHandler)
 406   {
 407     win_register_event_handler(win_ICONBAR,_dllEntry(ibicon__events),0);
 408     win_register_event_handler(win_ICONBARLOAD,_dllEntry(ibicon__events),0);
 409     menu_attachMaker
 410     (
 411       win_ICONBAR,
 412       _dllEntry(ibicon__menumaker),
 413       _dllEntry(ibicon__menuhandler),
 414       _dllEntry(ibicon__menuhelphandler),
 415       0
 416     );
 417     ibicon__eventHandler=TRUE;
 418   }
 419   if (text)
 420   {
 421     if (!maxtext)
 422       maxtext=strlen(text);
 423     if (new->data=mem_alloc(maxtext+1),!new->data)
 424     {
 425       mem_free(new);
 426       werr(FALSE,msgs_lookup("ibicnNEM:Not enough memory for icon."));
 427       return (0);
 428     }
 429     if (new->valid=mem_alloc(15),!new->valid)
 430     {
 431       mem_free(new);
 432       mem_free(new->data);
 433       werr(FALSE,msgs_lookup("ibicnNEM:Not enough memory for icon."));
 434       return (0);
 435     }
 436     strcpy(new->data,text);
 437     sprintf(new->valid,"S%s",spritename);
 438     i.i.data.indirecttext.buffer=new->data;
 439     i.i.data.indirecttext.validstring=new->valid;
 440     i.i.data.indirecttext.bufflen=maxtext+1;
 441     ibicon__spriteSize(spritename,sprarea,&i.i.box,FALSE);
 442     i.i.box.y0-=16;
 443     i.i.box.y1+=20;
 444     if (i.i.box.x1<16*maxtext)
 445       i.i.box.x1=16*maxtext;
 446   }
 447   else
 448   {
 449     if (new->data=mem_alloc(15),!new->data)
 450     {
 451       mem_free(new);
 452       werr(FALSE,msgs_lookup("ibicnNEM:Not enough memory for icon."));
 453       return (0);
 454     }
 455     strcpy(new->data,spritename);
 456     new->valid=0;
 457     i.i.data.indirectsprite.name=new->data;
 458     i.i.data.indirectsprite.spritearea=(void *)sprarea;
 459     i.i.data.indirectsprite.nameisname=TRUE;
 460     ibicon__spriteSize(spritename,sprarea,&i.i.box,TRUE);
 461   }
 462   switch (where)
 463   {
 464     case ibicon_LEFTSEARCHLEFT:
 465     case ibicon_LEFTSEARCHRIGHT:
 466       if (wimpt_getVersion()<300)
 467         where=ibicon_LEFT;
 468       break;
 469     case ibicon_RIGHTSEARCHLEFT:
 470     case ibicon_RIGHTSEARCHRIGHT:
 471       if (wimpt_getVersion()<300)
 472         where=ibicon_RIGHT;
 473       break;
 474   }
 475   i.w=where;
 476   i.i.flags=
 477   (
 478     wimp_ISPRITE |
 479     (text ? wimp_ITEXT : 0) |
 480     wimp_IHCENTRE |
 481     (text ? 0 : wimp_IVCENTRE) |
 482     wimp_INDIRECT |
 483     wimp_IBTYPE * wimp_BCLICKDEBOUNCE |
 484     wimp_IFORECOL * 7 |
 485     wimp_IBACKCOL * 1
 486   );
 487   wimpt_noerr(_swix(XWimp_CreateIcon,_inr(0,1)+_out(0),
 488                     ibicon__priority,(int)&i,
 489                     &new->icon));
 490   win_activeinc();
 491   for (c=(ibicon)&ibicon__anchor;c->next;c=c->next)
 492   {
 493     if (c->next->icon>new->icon)
 494       break;
 495   }
 496   new->next=c->next;
 497   if (ibicon__anchor)
 498     new->prev=c;
 499   else
 500     new->prev=0;
 501   if (c->next)
 502     c->next->prev=new;
 503   c->next=new;
 504   new->mnu=0;
 505   new->maker=0;
 506   new->menusel=0;
 507   new->menuhelp=0;
 508   new->menuHandle=0;
 509   new->handler=0;
 510   new->handle=0;
 511   new->raw=0;
 512   new->rawHandle=0;
 513   win_activeinc();
 514   return (new);
 515 }
 516
 517 /*
 518  * void ibicon_changeSprite(ibicon i,char *newsprite)
 519  *
 520  * Use
 521  *  Chnage the sprite displayed in an icon
 522  *
 523  * Parameters
 524  *  ibicon i == the icon to change
 525  *  char *newsprite == the new name
 526  */
 527
 528 void ibicon_changeSprite(ibicon i,char *newsprite)
 529 {
 530   if (i->valid)
 531     sprintf(i->valid,"S%s",newsprite);
 532   else
 533     strcpy(i->data,newsprite);
 534   wimpt_noerr(wimp_set_icon_state(-2,i->icon,0,0));
 535 }
 536
 537 /*
 538  * void ibicon_changeText(ibicon i,char *newtext)
 539  *
 540  * Use
 541  *  Change the text of an icon.
 542  *
 543  * Parameters
 544  *  ibicon i == the icon to change
 545  *  char *text == the new text to display
 546  */
 547
 548 void ibicon_changeText(ibicon i,char *newtext)
 549 {
 550   if (i->valid)
 551     strcpy(i->data,newtext);
 552   else
 553     werr(TRUE,msgs_lookup("ibicnCCT:(ibicon_changeText, caller fault): "
 554                          "Attempt to write text to sprite-only ibicon."));
 555   wimpt_noerr(wimp_set_icon_state(-2,i->icon,0,0));
 556 }
 557
 558 /*
 559  * void ibicon_attachMenu
 560  * (
 561  *   ibicon i,
 562  *   menu m,
 563  *   menu_selectProc sel,
 564  *   menu_helpProc help,
 565  *   void *handle
 566  * )
 567  *
 568  * Use
 569  *  Attaches a menu to an icon in the icon bar
 570  *
 571  * Parameters
 572  *  ibicon i == the icon to attach to
 573  *  menu m == the menu to attach
 574  *  menu_selectProc sel == a handler function for the menu
 575  *  menu_helpProc help == a help processor for the menu
 576  *  void *handle == a handle passed to the handler
 577  */
 578
 579 void ibicon_attachMenu
 580 (
 581   ibicon i,
 582   menu m,
 583   menu_selectProc sel,
 584   menu_helpProc help,
 585   void *handle
 586 )
 587 {
 588   i->mnu=m;
 589   i->maker=0;
 590   i->menusel=sel;
 591   i->menuhelp=help;
 592   i->menuHandle=handle;
 593 }
 594
 595 /*
 596  * void ibicon_attachMenuMaker
 597  * (
 598  *   ibicon i,
 599  *   event_menu_maker m,
 600  *   menu_selectProc sel,
 601  *   menu_helpProc help,
 602  *   void *handle
 603  * )
 604  *
 605  * Use
 606  *  Attaches a menu maker to an icon in the icon bar
 607  *
 608  * Parameters
 609  *  ibicon i == the icon to attach to
 610  *  event_menu_maker m == the menu maker to attach
 611  *  menu_selectProc sel == a handler function for the menu
 612  *  menu_helpProc help == a help processor for the menu
 613  *  void *handle == a handle passed to the handler
 614  */
 615
 616 void ibicon_attachMenuMaker
 617 (
 618   ibicon i,
 619   event_menu_maker m,
 620   menu_selectProc sel,
 621   menu_helpProc help,
 622   void *handle
 623 )
 624 {
 625   i->mnu=0;
 626   i->maker=m;
 627   i->menusel=sel;
 628   i->menuhelp=help;
 629   i->menuHandle=handle;
 630 }
 631
 632 /*
 633  * void ibicon_removeIcon(ibicon i)
 634  *
 635  * Use
 636  *  Removes an icon totally from the icon bar.
 637  *
 638  * Parameters
 639  *  ibicon i == the icon to vape
 640  */
 641
 642 void ibicon_removeIcon(ibicon i)
 643 {
 644   wimpt_noerr(wimp_delete_icon(-2,i->icon));
 645   if (i->prev)
 646     i->prev->next=i->next;
 647   else
 648     ibicon__anchor=i->next;
 649   if (i->next)
 650     i->next->prev=i->prev;
 651   mem_free(i);
 652   win_activedec();
 653 }
 654
 655 /*
 656  * void ibicon_eventHandler(ibicon i,ibicon_handler p,void *handle)
 657  *
 658  * Use
 659  *  Attaches the handler to an icon.
 660  *
 661  * Parameters
 662  *  ibicon i == the icon to attach
 663  *  ibicon_handler p == the handler
 664  *  void *handle == a pointer to pass to the handler
 665  */
 666
 667 void ibicon_eventHandler(ibicon i,ibicon_handler p,void *handle)
 668 {
 669   i->handler=p;
 670   i->handle=handle;
 671 }
 672
 673 /*
 674  * void ibicon_rawEventHandler(ibicon i,ibicon_rawHandler p,void *handle)
 675  *
 676  * Use
 677  *  Attaches a raw event handler.  This can 'vet' events before ibicon gets
 678  *  it mucky mits on them.
 679  *
 680  * Parameters
 681  *  ibicon i == the icon to attach
 682  *  ibicon_rawHandler p == the handler
 683  *  void *handle == a pointer to pass to the handler
 684  */
 685
 686 void ibicon_rawEventHandler(ibicon i,ibicon_rawHandler p,void *handle)
 687 {
 688   i->raw=p;
 689   i->rawHandle=handle;
 690 }