Usermode/Applications/axwin3_src/WM/renderer_menu.c

   1 /*
   2  * Acess2 Window Manager v3
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * render_menu.c
   6  * - Pop-up menu window class/renderer
   7  */
   8 #include <common.h>
   9 #include <menu_messages.h>
  10
  11 // === STRUCTURES ===
  12 typedef struct sMenuItem
  13 {
  14         // Settings
  15         char    *Label;
  16         char    *Shortcut;
  17          int    KeyOffset;
  18          int    Flags;
  19
  20         // Cached values
  21          int    LabelWidth;
  22          int    ShortcutWidth;
  23          int    UnderlineX;
  24          int    UnderlineW;
  25
  26         char    Data[];
  27 } tMenuItem;
  28
  29 typedef struct sMenuWindowInfo
  30 {
  31          int    MaxLabelWidth;
  32          int    MinLabelWidth;
  33
  34          int    MaxItems;
  35          int    nItems;
  36         tMenuItem       *Items[];
  37 } tMenuWindowInfo;
  38
  39 // === GLOBALS ===
  40 tWMRenderer     gRenderer_Menu = {
  41         .Name = "Menu",
  42         .CreateWindow = Renderer_Menu_Create,
  43         .Redraw = Renderer_Menu_Redraw,
  44         .HandleMessage = Renderer_Menu_HandleMessage
  45 };
  46
  47 // === CODE ===
  48 void Renderer_Menu_Init(void)
  49 {
  50         WM_RegisterRenderer(&gRenderer_Menu);
  51 }
  52
  53 tWindow *Renderer_Menu_Create(int Argument)
  54 {
  55         tWindow *ret;
  56         tMenuWindowInfo *info;
  57
  58         if(Argument < 5)        Argument = 5;
  59         if(Argument > 200)      Argument = 200;
  60
  61         ret = WM_CreateWindowStruct(sizeof(*info) + Argument*sizeof(info->Items[0]));
  62         info = ret->RendererInfo;
  63         info->MaxItems = Argument;
  64
  65         return ret;
  66 }
  67
  68 void Renderer_Menu_Redraw(tWindow *Window)
  69 {
  70         // TODO: Implement Renderer_Menu_Redraw
  71
  72         // - Resize window to contain all items
  73
  74         // - Move the window such that it is on screen
  75         //  > Make sure to catch if the menu can't fit fully onscreen
  76
  77         // - Render each item
  78 }
  79
  80 int Renderer_Menu_HandleMessage(tWindow *Window, int Msg, int Length, void *Data)
  81 {
  82         switch(Msg)
  83         {
  84         case MSG_MENU_ADDITEM: {
  85                 tMenuMsg_AddItem        *req = Data;
  86                 tMenuItem       *item;
  87                 if(Length < sizeof(*req) + 1)   return -1;
  88                 if(req->Label[Length-sizeof(*req)] != '\0')     return -1;
  89
  90                 if(info->Items[req->ID])        break;
  91                 item = malloc(sizeof(tMenuItem)+strlen(req->Label));
  92                 info->Items[req->ID] = item;
  93
  94                 if(req->Label[0] == '\0')
  95                 {
  96                         // Spacer
  97                         item->Label = NULL;
  98                 }
  99                 else
 100                 {
 101                         // Actual item
 102                         char    *dest = item->Data;
 103                         char    *src = req->Label;
 104                          int    ofs = 0;
 105                         // - Main label
 106                         item->KeyOffset = -1;
 107                         item->Label = dest;
 108                         for(ofs = 0; *src && *src != '\t'; ofs ++)
 109                         {
 110                                 if(*src == '&') {
 111                                         *dest = '\0';
 112                                         item->KeyOffset = ofs;
 113                                         src ++;
 114                                 }
 115                                 else {
 116                                         *dest++ = *src++;
 117                                 }
 118                         }
 119                         *dest = '\0';
 120                         // - Key combo / Shortcut
 121                         if(*src)
 122                         {
 123                                 src ++;
 124                                 item->Shortcut = dest;
 125                                 strcpy(item->Shortcut, src);
 126                         }
 127                         else
 128                         {
 129                                 item->Shortcut = NULL;
 130                         }
 131
 132                         // Get dimensions
 133                         // - Underline (hotkey)
 134                         if(item->KeyOffset == -1)
 135                         {
 136                                 item->UnderlineX = 0;
 137                                 item->UnderlineW = 0;
 138                         }
 139                         else
 140                         {
 141                                 char    tmp = item->Label[item->KeyOffset];
 142                                 item->Label[item->KeyOffset] = '\0';
 143                                 WM_Render_GetTextDims(NULL, item->Label, &item->UnderlineX, NULL);
 144                                 item->Label[item->KeyOffset] = tmp;
 145                                 tmp = item->Label[item->KeyOffset+1];
 146                                 item->Label[item->KeyOffset+1] = '\0';
 147                                 WM_Render_GetTextDims(NULL, item->Label+item->KeyOffset, &item->UnderlineW, NULL);
 148                                 item->Label[item->KeyOffset+1] = tmp;
 149                         }
 150                         // - Labels
 151                         WM_Render_GetTextDims(NULL, item->Label, &item->LabelWidth, NULL);
 152                         if(item->Shortcut)
 153                                 WM_Render_GetTextDims(NULL, item->Shortcut, &item->ShortcutWidth, NULL);
 154                         else
 155                                 item->ShortcutWidth = 0;
 156                 }
 157
 158                 break; }
 159
 160         // Only message to pass to client
 161         case MSG_MENU_SELECT:
 162                 return 1;
 163         }
 164         return 0;
 165 }
 166