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- /*
- * Simple menu package. Needs lotsa work to handle some cases.
- *
- * Copyright 1985
- * Louis A. Mamakos
- * Software & Stuff
- * 14813 Ashford Place
- * Laurel, MD 20707
- *
- * For non-commerical use only. This program, or any modifications, may not
- * be sold or incorporated into any product without prior permission from the
- * author.
- *
- * Modified by mwm to handle "stacking" menus.
- * NB - adding item to a menu that's been "popped" back to doesn't work,
- * and probably never will.
- * I took at the subitem code at the same time - mwm
- */
-
- /* Change if your terminal isn't * x 400 */
- #define SCREENHEIGHT 200
-
- #include <exec/types.h>
- #include <exec/nodes.h>
- #include <exec/lists.h>
- #include <exec/ports.h>
- #include <exec/devices.h>
- #include <exec/memory.h>
- #include <hardware/blit.h>
- #include <graphics/copper.h>
- #include <graphics/regions.h>
- #include <graphics/rastport.h>
- #include <graphics/gfxbase.h>
- #include <graphics/gels.h>
- #include <intuition/intuition.h>
-
- #define MNUM(menu,item,sub) (SHIFTMENU(menu)|SHIFTITEM(item)|SHIFTSUB(sub))
-
- struct Mem_Node {
- struct Node mn_Node;
- struct Remember mn_Memory;
- struct Menu *mn_Menu;
- } *Top, *RemHead();
-
- static struct List Memory;
- static int Cur_Menu, Cur_MenuItem, Cur_SubItem;
- static struct Menu *LastMenu;
- static struct MenuItem *LastMenuItem;
-
- struct Menu *AutoMenu; /* menu struct being dynamically built */
-
- char *strsave(); /* Save a string in the remember list */
-
- Menu_Init()
- {
- Memory.lh_Head = (struct Node *) &(Memory.lh_Tail);
- Memory.lh_TailPred = (struct Node *) &(Memory.lh_Head);
- Memory.lh_Tail = NULL;
- Memory.lh_Type = NT_MEMORY;
- Top = NULL;
- Cur_Menu = Cur_MenuItem = -1;
- AutoMenu = LastMenu = NULL; /* no menu chain yet */
- LastMenuItem = NULL;
- }
-
- Menu_Clear()
- {
-
- while ((Top = RemHead(&Memory)) != NULL) {
- FreeRemember(&(Top->mn_Memory), TRUE);
- FreeMem(Top, sizeof(struct Mem_Node));
- }
- Menu_Init(); /* Just for safeties sake */
- }
-
- Menu_Pop()
- {
-
- if ((Top = RemHead(&Memory)) == NULL) return NULL;
- FreeRemember(&(Top->mn_Memory), TRUE);
- FreeMem(Top, sizeof(struct Mem_Node));
- /* Now, set Top back to the real list head */
- Top = (struct Mem_Node *) Memory.lh_Head;
- LastMenu = Top->mn_Menu;
- LastMenuItem = NULL; /* Wrong, but you can't add items here anyway */
- Cur_Menu--;
- }
- /*
- * Add a MENU item. Args are the text of the menu item, and an enable
- * flag. Returns an Intuition type menu number, with the MenuItem and
- * Menu SubItem being NOITEM and NOSUB. The MENUITEM part is valid.
- */
- Menu_Add(name, enabled)
- char *name;
- int enabled;
- {
- register struct Menu *m;
-
- if ((Top = (struct Mem_Node *) AllocMem(
- sizeof(struct Mem_Node), MEMF_PUBLIC | MEMF_CLEAR)) == NULL)
- return NULL;
- Top->mn_Node.ln_Type = NT_MEMORY;
-
- if ((m = (struct Menu *)AllocRemember(&(Top->mn_Memory),
- sizeof (struct Menu), MEMF_PUBLIC | MEMF_CLEAR)) == NULL)
- return NULL;
- Top->mn_Menu = m;
-
- if (LastMenu == NULL)
- AutoMenu = m; /* first menu on list */
- else
- LastMenu->NextMenu = m; /* link it in */
-
- LastMenuItem = NULL; /* end of previous MenuItem list */
- Cur_MenuItem = -1; /* reset item numbers */
- if (LastMenu == NULL)
- m->LeftEdge = 0;
- else
- m->LeftEdge = LastMenu->LeftEdge + LastMenu->Width;
- m->TopEdge = 0;
- m->Width = strlen(name) * 8;
- Top->mn_Node.ln_Name = m->MenuName = strsave(name);
- m->Height = 0;
- m->Flags = enabled ? MENUENABLED : 0;
- m->FirstItem = NULL;
- LastMenu = m;
-
- AddHead(&Memory, Top);
- return MNUM(++Cur_Menu, NOITEM, NOSUB);
- }
-
- /*
- * Add a menu item to the current MENU. Note that Add_Menu *must* be
- * called before this function.
- */
- Menu_Item_Add(name, flags, mux, ch)
- char *name; /* name of menu item */
- USHORT flags;
- LONG mux; /* mutual exclusion mask */
- BYTE ch; /* command sequence character, if COMMSEQ */
- {
- register struct MenuItem *m, *n;
- register struct IntuiText *it;
-
- flags &= CHECKIT|CHECKED|COMMSEQ|MENUTOGGLE|ITEMENABLED|HIGHCOMP|HIGHBOX;
- if (LastMenu == NULL)
- return MNUM(NOMENU, NOITEM, NOSUB);
-
- if ((m = (struct MenuItem *) AllocRemember(&(Top->mn_Memory),
- sizeof(struct MenuItem), MEMF_PUBLIC | MEMF_CLEAR)) == NULL)
- return MNUM(NOMENU, NOITEM, NOSUB);
-
- if (LastMenuItem == NULL)
- LastMenu->FirstItem = m;
- else
- LastMenuItem->NextItem = m;
- m->Flags = flags | ITEMTEXT;
- /*
- * Check for highlight mode: if none selected, use HIGHCOMP
- */
- if ((m->Flags & (HIGHCOMP | HIGHBOX)) == 0)
- m->Flags |= HIGHCOMP;
- m->Command = ch;
- m->MutualExclude = mux;
- m->SubItem = NULL;
- m->ItemFill = (APTR) AllocRemember(&(Top->mn_Memory),
- sizeof(struct IntuiText), MEMF_PUBLIC | MEMF_CLEAR);
- it = (struct IntuiText *) m->ItemFill;
- it->FrontPen = AUTOFRONTPEN;
- it->BackPen = AUTOBACKPEN;
- it->DrawMode = JAM2;
- if (flags & CHECKIT)
- it->LeftEdge = CHECKWIDTH + 1;
- else
- it->LeftEdge = 1;
- it->TopEdge = 1;
- it->ITextFont = NULL; /* default font */
- it->IText = strsave(name);
- it->NextText = NULL;
- m->Width = 0;
- if (LastMenuItem == NULL) {
- m->TopEdge = 2;
- m->LeftEdge = 0;
- } else if (LastMenuItem->TopEdge + 40 > SCREENHEIGHT) {
- m->TopEdge = 2;
- m->LeftEdge = LastMenuItem->LeftEdge + LastMenuItem->Width + 12;
- } else {
- m->TopEdge = LastMenuItem->TopEdge + 12;
- m->LeftEdge = LastMenuItem->LeftEdge;
- }
- if (flags & CHECKIT)
- m->Width += CHECKWIDTH;
- if (flags & COMMSEQ)
- m->Width += COMMWIDTH + 20;
- m->Width += IntuiTextLength(m->ItemFill);
- m->Height = 10;
- /*
- * Check last menu item's width to see if it is larger than this
- * item's. If new item is larger, then update width of all other
- * items.
- */
- if (LastMenuItem) {
- if (LastMenuItem->Width > m->Width)
- m->Width = LastMenuItem->Width;
- else {
- register short delta = m->Width - LastMenuItem->Width;
-
- for (n = LastMenu->FirstItem; n != m; n = n->NextItem) {
- n->Width = m->Width;
- if (n->LeftEdge > 0) n->LeftEdge += delta;
- }
- if (m->LeftEdge > 0) m->LeftEdge += delta;
- }
- }
- LastMenuItem = m;
- return MNUM(Cur_Menu, ++Cur_MenuItem, NOSUB);
- }
-
-
-
- char *
- strsave(string) char *string; {
- char *out ;
-
- out = (char *) AllocRemember(&(Top->mn_Memory), strlen(string) + 1,
- MEMF_PUBLIC) ;
- if (out == NULL) return NULL ;
- (void) strcpy(out, string) ;
- return out ;
- }
-