Usermode/Applications/axwin3_src/libaxwin3.so_src/r_menu.c

   1 /*
   2  * AxWin3 Interface Library
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * r_menu.c
   6  * - Menu renderer interface
   7  */
   8 #include <stdlib.h>
   9 #include <axwin3/axwin.h>
  10 #include <axwin3/menu.h>
  11 #include <menu_messages.h>
  12 #include "include/internal.h"
  13 #include <string.h>
  14
  15 // === TYPES ===
  16 typedef struct sMenuWindowInfo  tMenuWindowInfo;
  17
  18 struct sAxWin3_MenuItem
  19 {
  20         tHWND   Window;
  21          int    ID;
  22         tAxWin3_Menu_Callback   Callback;
  23         void    *CbPtr;
  24         tHWND   SubMenu;
  25 };
  26
  27 struct sMenuWindowInfo
  28 {
  29          int    nItems;
  30         tAxWin3_MenuItem        *Items;
  31 };
  32
  33 // === CODE ===
  34 int AxWin3_Menu_int_Callback(tHWND Window, int Message, int Length, void *Data)
  35 {
  36         tMenuWindowInfo *info = AxWin3_int_GetDataPtr(Window);
  37         switch(Message)
  38         {
  39         case MSG_MENU_SELECT: {
  40                 tMenuMsg_Select *msg = Data;
  41                 tAxWin3_MenuItem        *item;
  42                 if(Length < sizeof(tMenuMsg_Select))    return -1;
  43                 if(msg->ID >= info->nItems)     return -1;
  44                 item = &info->Items[msg->ID];
  45                 if(item->Callback)      item->Callback(item->CbPtr);
  46                 return 0; }
  47         }
  48         return 1;
  49 }
  50
  51 tHWND AxWin3_Menu_Create(tHWND Parent)
  52 {
  53         tHWND   ret;
  54         tMenuWindowInfo *info;
  55
  56         ret = AxWin3_CreateWindow(Parent, "Menu", 0, sizeof(*info), AxWin3_Menu_int_Callback);
  57         if(!ret)        return ret;
  58
  59         info = AxWin3_int_GetDataPtr(ret);
  60         info->nItems = 0;
  61         info->Items = NULL;
  62
  63         return ret;
  64 }
  65
  66 void AxWin3_Menu_ShowAt(tHWND Menu, int X, int Y)
  67 {
  68         AxWin3_MoveWindow(Menu, X, Y);
  69         AxWin3_ShowWindow(Menu, 1);
  70 }
  71
  72 tAxWin3_MenuItem *AxWin3_Menu_AddItem(
  73         tHWND Menu, const char *Label,
  74         tAxWin3_Menu_Callback Cb, void *Ptr,
  75         int Flags, tHWND SubMenu
  76         )
  77 {
  78         tMenuWindowInfo *info;
  79         tAxWin3_MenuItem        *ret;
  80
  81         info = AxWin3_int_GetDataPtr(Menu);
  82
  83         info->nItems ++;
  84         info->Items = realloc(info->Items, sizeof(*info->Items)*info->nItems);
  85         if(!info->Items) {
  86                 _SysDebug("ERROR: Realloc Failed");
  87                 return NULL;
  88         }
  89
  90         ret = &info->Items[info->nItems-1];
  91         ret->ID = info->nItems - 1;
  92         ret->Window = Menu;
  93         ret->Callback = Cb;
  94         ret->CbPtr = Ptr;
  95         ret->SubMenu = SubMenu;
  96
  97         {
  98                 tMenuMsg_AddItem        *req;
  99                  int    data_size;
 100                 if(!Label)      Label = "";
 101                 data_size = sizeof(*req)+strlen(Label)+1;
 102                 req = malloc(data_size);
 103                 req->ID = ret->ID;
 104                 req->Flags = Flags;
 105                 req->SubMenuID = AxWin3_int_GetWindowID(SubMenu);
 106                 strcpy(req->Label, Label);
 107                 AxWin3_SendMessage(Menu, Menu, MSG_MENU_ADDITEM, data_size, req);
 108                 free(req);
 109         }
 110
 111         return ret;
 112 }