#include <windows.h>
#include <mmsystem.h>
#include "Pattern.h"



/*

  Changelog
  -

  27/05/05

    v017 made

*/



//--- DATA -------------------------------------------------------------------//

HINSTANCE hMainInstance;
HWND hMainWindow = NULL;

char szAppName[40] = "Lewpen's pattern generator";

  RECT rc;  //  client rect of screen

#define WINDOW_HEIGHT 400
#define WINDOW_WIDTH  300



//---- Startup ---------------------------------------------------------------//

void Startup()
{
  Pattern_Startup();
}



//---- Display ---------------------------------------------------------------//

int frame_number = 0;

void Display(HDC dc, PATTERN_RGB *rgb)
{
  frame_number ++;

  if( frame_number % 2 ) return;

  BITMAPINFO bmi;

  bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
  bmi.bmiHeader.biWidth = DIM;
  bmi.bmiHeader.biHeight = -DIM;
  bmi.bmiHeader.biPlanes = 1;
  bmi.bmiHeader.biBitCount = 24;
  bmi.bmiHeader.biCompression = BI_RGB;
  bmi.bmiHeader.biSizeImage = 0;
  bmi.bmiHeader.biXPelsPerMeter = 1000;
  bmi.bmiHeader.biYPelsPerMeter = 1000;
  bmi.bmiHeader.biClrUsed = 0;
  bmi.bmiHeader.biClrImportant = 0;

  int w = WINDOW_WIDTH, h = WINDOW_HEIGHT, x=0, y=0;

  for(y = 0; y < h; y += DIM)
    for(x = 0; x < w; x += DIM)

      StretchDIBits(
        dc,
        x, y, DIM, DIM,
        0, 0, DIM, DIM,
        (LPVOID)rgb->buf,
        (LPBITMAPINFO)&bmi,
        DIB_RGB_COLORS, SRCCOPY
      );

}



//---- Redraw ----------------------------------------------------------------//

void Redraw(HDC dc)
{
  Display( dc, Pattern_Generate() );
}



//---- WinProc ---------------------------------------------------------------//

int mouse_l=0;

LRESULT CALLBACK WinProc(HWND hwnd, UINT uiMsg, UINT wParam, LONG lParam)
{
  int mouse_x=0, mouse_y=0;

  HDC dc;
  PAINTSTRUCT ps;

  switch(uiMsg) {

  case WM_CREATE:
    Startup();
    SetTimer(hwnd, 1, 10, NULL);
    GetClientRect( hwnd, &rc );
    SetWindowPos( hwnd, NULL, 0, 0, WINDOW_WIDTH+WINDOW_WIDTH-rc.right, WINDOW_HEIGHT+WINDOW_HEIGHT-rc.bottom, SWP_NOMOVE );
    break;

  case WM_TIMER:
    dc = GetDC(hwnd);
    Redraw(dc);
    ReleaseDC(hwnd, dc);
    return 0L;

  case WM_PAINT:
    dc = BeginPaint(hwnd, &ps);
    Redraw(dc);
    EndPaint(hwnd, &ps);
    return 0L;

  //- WM_MOUSEMOVE

  case WM_MOUSEMOVE:
    mouse_x = LOWORD(lParam);
    mouse_y = HIWORD(lParam);

    if( !mouse_l ) MouseMove( mouse_x, mouse_y );

    //  TEMP: TODO: Make this a Pattern_MouseDrag function

    if( mouse_l ) drag(mouse_x, mouse_y);

    break;

  //- WM_LBUTTONDOWN

  case WM_LBUTTONDOWN:  //  todo: capture focus so that we know when the button is released
    mouse_x = LOWORD(lParam);
    mouse_y = HIWORD(lParam);
    mouse_l = 1;
    if( mouse_l ) drag(mouse_x, mouse_y);
    break;

  //- WM_LBUTTONUP

  case WM_LBUTTONUP:
    mouse_l = 0;
    break;


/*
//  full-window drag
  case WM_NCHITTEST:
    return HTCAPTION;
*/

  case WM_KEYDOWN:
    if( wParam == VK_ESCAPE ) PostMessage( hwnd, WM_DESTROY, 0, 0 );
    return 0L;

  case WM_DESTROY:
    KillTimer(hwnd, 1);
    PostQuitMessage(0);
    return 0L;

  }

  return DefWindowProc(hwnd, uiMsg, wParam, lParam);
}




//---- WinMain ---------------------------------------------------------------//

int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
  WNDCLASS wndclass;
  char cSwitch;
  MSG msg;
  RECT rc;

  hMainInstance = hInstance;

  if(hPrevInstance) return 1;

  //- Create window class

  wndclass.style         = CS_HREDRAW | CS_VREDRAW;
  wndclass.lpfnWndProc   = WinProc;
  wndclass.cbClsExtra    = 0;
  wndclass.cbWndExtra    = 0;
  wndclass.hInstance     = hInstance;
  wndclass.hIcon         = NULL;
  wndclass.hCursor       = LoadCursor(NULL, IDC_ARROW);
  wndclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
  wndclass.lpszMenuName  = NULL;
  wndclass.lpszClassName = szAppName;

  if(!RegisterClass(&wndclass)) return 1;

  //- Create main window

  hMainWindow = CreateWindowEx(
    0,
    szAppName,
    szAppName,
    WS_OVERLAPPEDWINDOW,//WS_OVERLAPPED,//WS_POPUP,
    50,
    50,
    WINDOW_WIDTH,
    WINDOW_HEIGHT,
    NULL,
    NULL,
    hInstance,
    NULL
  );

  if(!hMainWindow) return 1;

  ShowWindow(hMainWindow, SW_SHOW);

  //- Message loop

  while(TRUE) {
    while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
      if (msg.message == WM_QUIT) return TRUE;
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
    HDC dc = GetDC(hMainWindow);
    Redraw(dc);
    ReleaseDC(hMainWindow, dc);
  }

  return 0;
}



//---- END OF FILE -----------------------------------------------------------//