/*[]=====================================================================[]*/
/*[]     LeadTools Run Time Library - Version 11                         []*/
/*[]                                                                     []*/
/*[]                                                                     []*/
/*[]     Copyright (c) 1991-2000 LEAD Technologies, Inc.                 []*/
/*[]     All Rights Reserved.                                            []*/
/*[]                                                                     []*/
/*[]     draw.c                                                          []*/
/*[]=====================================================================[]*/

#include "draw.h"
#include "defines.h"
#include "windows.h"
#include "extern.h"

L_VOID ShowDicomImage()
{
   ShowWindow(hTreeKey, SW_HIDE);
   ShowWindow(hButtonImage, SW_SHOW);
   InvalidateRect(hButtonImage, NULL, TRUE);
}

L_VOID HideDicomImage()
{
   ShowWindow(hTreeKey, SW_SHOW);
   ShowWindow(hButtonImage, SW_HIDE);
}

L_VOID MatchAspectRatio (LPRECT pRect, L_INT nImageWidth, L_INT nImageHeight)
{
   L_INT cxRect, cyRect;
   L_INT nRectWidth, nRectHeight;
   
   nRectWidth = pRect->right - pRect->left;
   nRectHeight = pRect->bottom - pRect->top;
   
   cyRect = nRectHeight;
   cxRect = MulDiv (cyRect, nImageWidth, nImageHeight);
   
   if (cxRect > nRectWidth)
   {
      cxRect = nRectWidth;
      cyRect = MulDiv (cxRect, nImageHeight, nImageWidth);
      pRect->top = (pRect->bottom - pRect->top - cyRect) / 2;
   }
   else
   {
      pRect->left = (pRect->right - pRect->left - cxRect) / 2;
   }
   
   
   pRect->bottom = pRect->top + cyRect;
   pRect->right = pRect->left + cxRect;
   
}

L_VOID PaintBitmap(HDC hDC, LPRECT pDest, pBITMAPHANDLE pBitmap)
{
   HPALETTE hOldPal;
   HBRUSH hBrush, hOldBrush;
   HPEN   hPen,   hOldPen;
   RECT   rcCenter;
   L_BOOL bFirstPaint;

   hBrush = GetStockObject(GRAY_BRUSH);
   hPen = GetStockObject(BLACK_PEN);
   hOldBrush = SelectObject(hDC, hBrush);
   hOldPen = SelectObject(hDC, hPen);

   //Get a destination rectangle preserving the aspect ratio of the image
   CopyRect(&rcCenter, pDest);

   MatchAspectRatio (&rcCenter, BITMAPWIDTH(pBitmap), BITMAPHEIGHT(pBitmap));

   bFirstPaint = hPaletteGlobal == NULL;
   if (hPaletteGlobal == NULL)
   {
      hPaletteGlobal = L_CreatePaintPalette(hDC, pBitmap);
   }

   if(hPaletteGlobal)
   {
      //If first paint, releaize palette as foreground palette
      hOldPal = SelectPalette(hDC, hPaletteGlobal, !bFirstPaint);
      RealizePalette(hDC);
   }
   L_PaintDC(hDC,
             pBitmap,
             NULL,
             NULL,
             &rcCenter,
             NULL,
             SRCCOPY);
   if(hPaletteGlobal)
   {
      SelectPalette(hDC, hOldPal, TRUE);
   }
   SelectObject(hDC, hOldBrush);
   SelectObject(hDC, hOldPen);
   return;
}


HWND CreateButtonImage(HWND hWnd)
{
   HWND hButton;
   HIMAGELIST hImage=0;
   DWORD dwStyle;
   DWORD dRet;
   RECT rcTree;
   POINT ptTopLeft;

   GetWindowRect(hTreeKey, &rcTree);

   ptTopLeft.x = rcTree.left;
   ptTopLeft.y = rcTree.top;
   
   ScreenToClient(hWnd, &ptTopLeft); 

   dwStyle =BS_OWNERDRAW | WS_CHILD | BS_PUSHBUTTON;

   //Create owner drawn button for displaying Dicom images
   hButton = CreateWindowEx(  
      WS_EX_CLIENTEDGE,             // extended window style
      "Button",                     // pointer to registered class name
      "",                           // pointer to window name
      dwStyle,                      // window style
      ptTopLeft.x,               // horizontal position of window
      ptTopLeft.y,                // vertical position of window
      rcTree.right - rcTree.left,              // window width  
      rcTree.bottom- rcTree.top,             // window height
      hWnd,                         // handle to parent or owner window
      (HMENU)IDC_BUTTON_IMAGE,      // handle to menu, or child-window identifier
      hInst,                        // handle to application instance
      NULL                          // pointer to window-creation data
      );

   if (hButton == NULL)
      dRet = GetLastError();

   return hButton;
}