Usermode/Applications/axwin3_src/WM/renderers/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 <wm_renderer.h>
  10 #include <menu_messages.h>
  11 #include <wm_messages.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 // === STRUCTURES ===
  16 typedef struct sMenuItem
  17 {
  18         // Settings
  19         char    *Label;
  20         char    *Shortcut;
  21          int    KeyOffset;
  22          int    Flags;
  23
  24         // Cached values
  25          int    LabelWidth;
  26          int    ShortcutWidth;
  27          int    UnderlineX;
  28          int    UnderlineW;
  29
  30         char    Data[];
  31 } tMenuItem;
  32
  33 typedef struct sMenuWindowInfo
  34 {
  35          int    MaxLabelWidth;
  36          int    MaxShortcutWidth;
  37          int    CachedW;
  38
  39          int    HilightedItem;
  40
  41          int    MaxItems;
  42          int    nItems;
  43         tMenuItem       *Items[];
  44 } tMenuWindowInfo;
  45
  46 // === PROTOTYPES ===
  47 void    Renderer_Menu_Init(void);
  48 tWindow *Renderer_Menu_Create(int Argument);
  49 void    Renderer_Menu_Redraw(tWindow *Window);
  50  int    Renderer_Menu_HandleIPC_AddItem(tWindow *Window, size_t Length, const void *Data);
  51  int    Renderer_Menu_HandleIPC_SetFlags(tWindow *Window, size_t Length, const void *Data);
  52  int    Renderer_Menu_HandleMessage(tWindow *Window, int Msg, int Length, const void *Data);
  53
  54 // === CONSTANTS ===
  55 const int       ciMenu_Gap = 10;        // Gap between label and shortcut
  56 const int       ciMenu_TopPadding = 2;
  57 const int       ciMenu_BottomPadding = 2;
  58 const int       ciMenu_LeftPadding = 2;
  59 const int       ciMenu_RightPadding = 2;
  60 const int       ciMenu_FontHeight = 16;
  61 const int       ciMenu_ItemHeight = 20;
  62 const int       ciMenu_SpacerHeight = 5;
  63 const tColour   cMenu_BackgroundColour = 0xCCCCCC;
  64 const tColour   cMenu_BorderColour   = 0x000000;
  65 const tColour   cMenu_SpacerColour   = 0x404040;
  66 const tColour   cMenu_LabelColour    = 0x000000;
  67 const tColour   cMenu_ShortcutColour = 0x404040;
  68 const tColour   cMenu_HilightColour  = 0xE0E0E0;
  69
  70 // === GLOBALS ===
  71 tWMRenderer     gRenderer_Menu = {
  72         .Name = "Menu",
  73         .CreateWindow = Renderer_Menu_Create,
  74         .Redraw = Renderer_Menu_Redraw,
  75         .HandleMessage = Renderer_Menu_HandleMessage,
  76         .nIPCHandlers = 2,
  77         .IPCHandlers = {
  78                 Renderer_Menu_HandleIPC_AddItem,
  79 //              Renderer_Menu_HandleIPC_SetFlags
  80         }
  81 };
  82 tFont   *gMenu_Font = NULL;     // System monospace
  83
  84 // === CODE ===
  85 void Renderer_Menu_Init(void)
  86 {
  87         WM_RegisterRenderer(&gRenderer_Menu);
  88 }
  89
  90 tWindow *Renderer_Menu_Create(int Argument)
  91 {
  92         tWindow *ret;
  93         tMenuWindowInfo *info;
  94
  95         if(Argument < 5)        Argument = 5;
  96         if(Argument > 200)      Argument = 200;
  97
  98         ret = WM_CreateWindowStruct(sizeof(*info) + Argument*sizeof(info->Items[0]));
  99         info = ret->RendererInfo;
 100         info->MaxItems = Argument;
 101         info->HilightedItem = -1;
 102
 103         ret->Flags |= WINFLAG_NODECORATE;
 104         ret->H = ciMenu_TopPadding + ciMenu_BottomPadding;
 105
 106 //      _SysDebug("Renderer_Menu_Create: ->MaxItems = %i", info->MaxItems);
 107
 108         return ret;
 109 }
 110
 111 void Renderer_Menu_Redraw(tWindow *Window)
 112 {
 113         tMenuWindowInfo *info = Window->RendererInfo;
 114          int    w, h, y, i;
 115
 116         w = info->CachedW;
 117         #if 0
 118         h = ciMenu_TopPadding + ciMenu_BottomPadding;
 119         for( i = 0; i < info->nItems; i ++ )
 120         {
 121                 if( !info->Items[i] )   continue;
 122
 123                 if(info->Items[i]->Label)
 124                         h += ciMenu_ItemHeight;
 125                 else
 126                         h += ciMenu_SpacerHeight;
 127         }
 128         #else
 129         h = Window->H;
 130         #endif
 131
 132 //      _SysDebug("w = %i, h = %i", w, h);
 133
 134         // - Move the window such that it is on screen
 135         //  > Make sure to catch if the menu can't fit fully onscreen
 136
 137         // - Clear
 138         WM_Render_FillRect(Window, 0, 0, w, h, cMenu_BackgroundColour);
 139         WM_Render_DrawRect(Window, 0, 0, w, h, cMenu_BorderColour);
 140
 141         // - Render each item
 142         y = ciMenu_TopPadding;
 143         for( i = 0; i < info->nItems; i ++ )
 144         {
 145                 tMenuItem       *item = info->Items[i];
 146
 147                 // Unused slot
 148                 if(!item)       continue;
 149
 150                 // Spacer
 151                 if(!item->Label)
 152                 {
 153                         WM_Render_FillRect(Window,
 154                                 1, y + ciMenu_SpacerHeight/2,
 155                                 w-2, 1,
 156                                 cMenu_SpacerColour
 157                                 );
 158                         y += ciMenu_SpacerHeight;
 159                         continue ;
 160                 }
 161
 162                 // Hilight
 163                 if( info->HilightedItem == i )
 164                 {
 165                         WM_Render_FillRect(Window,
 166                                 1, y,
 167                                 w-2, ciMenu_ItemHeight,
 168                                 cMenu_HilightColour
 169                                 );
 170                 }
 171
 172                 // Text
 173                 WM_Render_DrawText(Window,
 174                         ciMenu_LeftPadding, y+1,
 175                         w, ciMenu_ItemHeight,
 176                         gMenu_Font,
 177                         cMenu_LabelColour,
 178                         item->Label, -1
 179                         );
 180                 // Underline
 181                 if(item->UnderlineW)
 182                 {
 183                         WM_Render_FillRect(Window,
 184                                 ciMenu_LeftPadding + item->UnderlineX, y + 1 + ciMenu_FontHeight,
 185                                 item->UnderlineW, 1,
 186                                 cMenu_LabelColour
 187                                 );
 188                 }
 189
 190                 // Shortcut key
 191                 if(item->Shortcut)
 192                 {
 193                         WM_Render_DrawText(Window,
 194                                 w - item->ShortcutWidth - ciMenu_RightPadding, y,
 195                                 w, ciMenu_ItemHeight,
 196                                 gMenu_Font,
 197                                 cMenu_ShortcutColour,
 198                                 item->Shortcut, -1
 199                                 );
 200                 }
 201
 202                 y += ciMenu_ItemHeight;
 203         }
 204 }
 205
 206 int Renderer_Menu_HandleIPC_AddItem(tWindow *Window, size_t Length, const void *Data)
 207 {
 208         const tMenuIPC_AddItem  *Msg = Data;
 209         tMenuWindowInfo *info = Window->RendererInfo;
 210         tMenuItem       *item;
 211
 212         // Sanity checking
 213         // - Message length
 214         if(Length < sizeof(*Msg) + 1 || Msg->Label[Length-sizeof(*Msg)-1] != '\0') {
 215                 _SysDebug("Renderer_Menu_int_AddItem: Size checks failed");
 216                 return -1;
 217         }
 218         // - ID Number
 219         if(Msg->ID >= info->MaxItems) {
 220                 _SysDebug("Renderer_Menu_int_AddItem: ID (%i) >= MaxItems (%i)",
 221                         Msg->ID, info->MaxItems);
 222                 return -1;
 223         }
 224
 225         // Don't overwrite
 226         if(info->Items[Msg->ID]) {
 227                 _SysDebug("- Caught overwrite of %i", Msg->ID);
 228                 return 0;
 229         }
 230         // Bookkeeping
 231         if(Msg->ID >= info->nItems)     info->nItems = Msg->ID + 1;
 232         // Allocate
 233         item = malloc(sizeof(tMenuItem)+strlen(Msg->Label)+1);
 234         info->Items[Msg->ID] = item;
 235
 236         if(Msg->Label[0] == '\0')
 237         {
 238                 // Spacer
 239                 item->Label = NULL;
 240                 WM_ResizeWindow(Window, info->CachedW, Window->H+ciMenu_SpacerHeight);
 241
 242                 return 0;
 243         }
 244
 245         // Actual item
 246         char    *dest = item->Data;
 247         const char      *src = Msg->Label;
 248          int    ofs = 0;
 249
 250         // - Main label
 251         item->KeyOffset = -1;
 252         item->Label = dest;
 253         for(ofs = 0; *src && *src != '\t'; ofs ++)
 254         {
 255                 if(*src == '&') {
 256                         *dest = '\0';
 257                         item->KeyOffset = ofs;
 258                         src ++;
 259                 }
 260                 else {
 261                         *dest++ = *src++;
 262                 }
 263         }
 264         *dest++ = '\0';
 265         // - Key combo / Shortcut
 266         if(*src)
 267         {
 268                 src ++;
 269                 item->Shortcut = dest;
 270                 strcpy(item->Shortcut, src);
 271         }
 272         else
 273         {
 274                 item->Shortcut = NULL;
 275         }
 276
 277         // Get dimensions
 278         // - Underline (hotkey)
 279         if(item->KeyOffset == -1)
 280         {
 281                 item->UnderlineX = 0;
 282                 item->UnderlineW = 0;
 283         }
 284         else
 285         {
 286                 // Get width of preceding substring
 287                 WM_Render_GetTextDims(NULL, item->Label, item->KeyOffset, &item->UnderlineX, NULL);
 288                 // Get the width of the underlined character
 289                 // NOTE: 1 makes only one character be parsed, even if it is >1 byte long
 290                 WM_Render_GetTextDims(
 291                         NULL, item->Label+item->KeyOffset, 1,
 292                         &item->UnderlineW, NULL
 293                         );
 294         }
 295         // - Labels
 296         WM_Render_GetTextDims(NULL, item->Label, -1, &item->LabelWidth, NULL);
 297         if(item->Shortcut)
 298                 WM_Render_GetTextDims(NULL, item->Shortcut, -1, &item->ShortcutWidth, NULL);
 299         else
 300                 item->ShortcutWidth = 0;
 301
 302         // Get maximum lengths (to determine the size of the menu
 303         if( item->LabelWidth > info->MaxLabelWidth )
 304                 info->MaxLabelWidth = item->LabelWidth;
 305         if( item->ShortcutWidth > info->MaxShortcutWidth )
 306                 info->MaxShortcutWidth = item->ShortcutWidth;
 307
 308         // Update width
 309         // TODO: Check, do I want to resize down too?
 310         // TODO: Take into account padding too
 311         if( info->MaxLabelWidth + info->MaxShortcutWidth + ciMenu_Gap > info->CachedW )
 312         {
 313                 info->CachedW = ciMenu_LeftPadding + info->MaxLabelWidth
 314                         + ciMenu_Gap + info->MaxShortcutWidth
 315                         + ciMenu_RightPadding;
 316         }
 317         WM_ResizeWindow(Window, info->CachedW, Window->H+ciMenu_ItemHeight);
 318
 319         return 0;
 320 }
 321
 322 /**
 323  * \brief Convert coordinates into an item index
 324  */
 325 int Renderer_Menu_int_GetItemByPos(tWindow *Window, tMenuWindowInfo *Info, int X, int Y)
 326 {
 327          int    i;
 328
 329         if( X < 0 || X >= Window->W )
 330                 return -1;
 331
 332         for( i = 0; i < Info->nItems; i ++ )
 333         {
 334                 if( !Info->Items[i] )   continue;
 335
 336                 if( !Info->Items[i]->Label )
 337                 {
 338                         // Spacer - not selectable
 339                         if(Y < ciMenu_SpacerHeight) {
 340                                 return -1;
 341                         }
 342                         Y -= ciMenu_SpacerHeight;
 343                 }
 344                 else
 345                 {
 346                         // Normal item, can be selected/hilighted
 347                         if(Y < ciMenu_ItemHeight) {
 348                                 return i;
 349                         }
 350                         Y -= ciMenu_ItemHeight;
 351                 }
 352         }
 353         return -1;
 354 }
 355
 356 int Renderer_Menu_HandleMessage(tWindow *Window, int Msg, int Length, const void *Data)
 357 {
 358         tMenuWindowInfo *info = Window->RendererInfo;
 359         switch(Msg)
 360         {
 361         case WNDMSG_SHOW: {
 362                 const struct sWndMsg_Bool       *msg = Data;
 363                 if(Length < sizeof(*msg))       return -1;
 364                 if(msg->Val)
 365                 {
 366 //                      _SysDebug(" - Shown, take focus");
 367                         // TODO: This shouldn't really be done, instead focus should be given
 368                         //       when the menu is shown.
 369 //                      WM_FocusWindow(Window);
 370                         WM_RaiseWindow(Window); // If it's shown, raise it to the heavens!
 371                 }
 372                 else
 373                 {
 374                         // Hide Children
 375                         _SysDebug("- Hidden, hide the children!");
 376                 }
 377                 return 0; }
 378         case WNDMSG_FOCUS: {
 379                 const struct sWndMsg_Bool       *msg = Data;
 380                 if(Length < sizeof(*msg))       return -1;
 381                 if(!msg->Val) {
 382                         // TODO: Catch if focus was given away to a child
 383                         _SysDebug("- Lost focus");
 384                         WM_ShowWindow(Window, 0);       // Hide!
 385                 }
 386                 else {
 387                         _SysDebug("- Focus gained, TODO: Show accel keys");
 388                 }
 389                 return 0; }
 390
 391         case WNDMSG_MOUSEBTN: {
 392                 const struct sWndMsg_MouseButton        *msg = Data;
 393                  int    item;
 394
 395                 if(Length < sizeof(*msg))       return -1;
 396
 397                 if(msg->Button == 0 && msg->bPressed == 0)
 398                 {
 399                         item = Renderer_Menu_int_GetItemByPos(Window, info, msg->X, msg->Y);
 400                         if(item != -1)
 401                         {
 402                                 tMenuMsg_Select _msg;
 403                                 // TODO: Ignore sub-menus too
 404                                 _msg.ID = item;
 405                                 WM_SendMessage(Window, Window, MSG_MENU_SELECT, sizeof(_msg), &_msg);
 406                                 WM_ShowWindow(Window, 0);
 407                         }
 408                 }
 409
 410
 411                 return 0; }
 412
 413         case WNDMSG_MOUSEMOVE: {
 414                 const struct sWndMsg_MouseMove  *msg = Data;
 415                  int    new_hilight;
 416
 417                 if(Length < sizeof(*msg))       return -1;
 418
 419                 new_hilight = Renderer_Menu_int_GetItemByPos(Window, info, msg->X, msg->Y);
 420
 421                 if( new_hilight != info->HilightedItem )
 422                 {
 423                         info->HilightedItem = new_hilight;
 424                         // TODO: Change sub-menu
 425                         WM_Invalidate(Window);
 426                 }
 427
 428                 return 0; }
 429
 430         // Only message to pass to client
 431         case MSG_MENU_SELECT:
 432                 return 1;
 433         }
 434         return 0;
 435 }
 436