Usermode/Applications/axwin3_src/WM/wm.c

   1 /*
   2  * Acess2 Window Manager v3
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * wm.c
   6  * - Window manager core
   7  */
   8 #include <common.h>
   9 #include <wm_renderer.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12
  13 // === GLOBALS ===
  14 tWMRenderer     *gpWM_Renderers;
  15 // - Render order list (gpWM_FirstWindow is rendered first)
  16 tWindow *gpWM_RootWindow;
  17
  18 // === CODE ===
  19 void WM_Initialise(void)
  20 {
  21         WM_CreateWindow(NULL, 0x8888FF, "Background");
  22 }
  23
  24 void WM_RegisterRenderer(tWMRenderer *Renderer)
  25 {
  26         // TODO: Catch out duplicates
  27         Renderer->Next = gpWM_Renderers;
  28         gpWM_Renderers = Renderer;
  29 }
  30
  31 tWindow *WM_CreateWindow(tWindow *Parent, int RendererArg, const char *RendererName)
  32 {
  33         tWMRenderer     *renderer;
  34         tWindow *ret;
  35
  36         // - Get Renderer
  37         for( renderer = gpWM_Renderers; renderer; renderer = renderer->Next )
  38         {
  39                 if(strcmp(RendererName, renderer->Name) == 0)
  40                         break;
  41         }
  42         if(renderer == NULL)
  43                 return NULL;
  44
  45         // - Call create window function
  46         ret = renderer->CreateWindow(RendererArg);
  47         ret->Parent = Parent;
  48
  49         if(!Parent)
  50                 Parent = gpWM_RootWindow;
  51
  52         // Append to parent
  53         if(Parent)
  54         {
  55                 if(Parent->LastChild)
  56                         Parent->LastChild->NextSibling = ret;
  57                 else
  58                         Parent->FirstChild = ret;
  59                 ret->PrevSibling = Parent->LastChild;
  60                 Parent->LastChild = ret;
  61         }
  62         else
  63         {
  64                 gpWM_RootWindow = ret;
  65         }
  66
  67         // - Return!
  68         return ret;
  69 }
  70
  71 tWindow *WM_CreateWindowStruct(size_t ExtraSize)
  72 {
  73         return calloc( sizeof(tWindow) + ExtraSize, 1 );
  74 }
  75
  76 void WM_int_UpdateWindow(tWindow *Window)
  77 {
  78         tWindow *child;
  79
  80         // Ignore hidden windows
  81         if( !(Window->Flags & WINFLAG_SHOW) )
  82                 return ;
  83         // Ignore unchanged windows
  84         if( Window->Flags & WINFLAG_CLEAN )
  85                 return;
  86
  87         // Render
  88         Window->Renderer->Redraw(Window);
  89
  90         // Process children
  91         for( child = Window->FirstChild; child; child = child->NextSibling )
  92         {
  93                 WM_int_UpdateWindow(child);
  94         }
  95
  96         Window->Flags |= WINFLAG_CLEAN;
  97 }
  98
  99 void WM_Update(void)
 100 {
 101         // - Iterate through visible windows, updating them as needed
 102
 103         // - Draw windows from back to front to the render buffer
 104
 105         // - Blit the buffer to the screen
 106 }
 107
 108 void WM_Render_FilledRect(tWindow *Window, tColour Colour, int X, int Y, int W, int H)
 109 {
 110         // Clip to window dimensions
 111         if(X < 0) { W += X; X = 0; }
 112         if(Y < 0) { H += Y; Y = 0; }
 113         if(X >= Window->W)      return;
 114         if(Y >= Window->H)      return;
 115         if(X + W > Window->W)   W = Window->W - X;
 116         if(Y + H > Window->H)   H = Window->H - Y;
 117
 118         // Render to buffer
 119         // Create if needed?
 120
 121         UNIMPLEMENTED();
 122 }
 123