Mercurial > vba-linux

     1 // ZoomControl.cpp : implementation file

     2 //

     3 

     4 #include "stdafx.h"

     5 #include "ZoomControl.h"

     6 

     7 bool ZoomControl::isRegistered = false;

     8 

     9 /////////////////////////////////////////////////////////////////////////////

    10 // ZoomControl

    11 

    12 ZoomControl::ZoomControl()

    13 {

    14 	ZeroMemory(colors, 3*64);

    15 	selected = -1;

    16 	registerClass();

    17 }

    18 

    19 ZoomControl::~ZoomControl()

    20 {}

    21 

    22 BEGIN_MESSAGE_MAP(ZoomControl, CWnd)

    23 //{{AFX_MSG_MAP(ZoomControl)

    24 ON_WM_PAINT()

    25 ON_WM_LBUTTONDOWN()

    26 ON_WM_ERASEBKGND()

    27 //}}AFX_MSG_MAP

    28 END_MESSAGE_MAP()

    29 

    30 /////////////////////////////////////////////////////////////////////////////

    31 // ZoomControl message handlers

    32 

    33 void ZoomControl::registerClass()

    34 {

    35 	if (!isRegistered)

    36 	{

    37 		WNDCLASS wc;

    38 		ZeroMemory(&wc, sizeof(wc));

    39 		wc.style         = CS_HREDRAW | CS_VREDRAW | CS_GLOBALCLASS;

    40 		wc.lpfnWndProc   = (WNDPROC) ::DefWindowProc;

    41 		wc.hInstance     = AfxGetInstanceHandle();

    42 		wc.hIcon         = NULL;

    43 		wc.hCursor       = LoadCursor(NULL, IDC_ARROW);

    44 		wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);

    45 		wc.lpszMenuName  = NULL;

    46 		wc.lpszClassName = "VbaZoomControl";

    47 		AfxRegisterClass(&wc);

    48 		isRegistered = true;

    49 	}

    50 }

    51 

    52 void ZoomControl::OnPaint()

    53 {

    54 	CPaintDC dc(this); // device context for painting

    55 

    56 	RECT rect;

    57 	GetClientRect(&rect);

    58 

    59 	int w = rect.right - rect.left;

    60 	int h = rect.bottom - rect.top;

    61 

    62 	CDC memDC ;

    63 	memDC.CreateCompatibleDC(&dc);

    64 	CBitmap bitmap, *pOldBitmap;

    65 	bitmap.CreateCompatibleBitmap(&dc, w, h);

    66 

    67 	pOldBitmap = memDC.SelectObject(&bitmap);

    68 

    69 	int multX = w / 8;

    70 	int multY = h / 8;

    71 

    72 	int i;

    73 	for (i = 0; i < 64; i++)

    74 	{

    75 		CBrush b;

    76 		b.CreateSolidBrush(RGB(colors[i*3+2], colors[i*3+1], colors[i*3]));

    77 

    78 		RECT r;

    79 		int  x = i & 7;

    80 		int  y = i / 8;

    81 		r.top    = y*multY;

    82 		r.left   = x*multX;

    83 		r.bottom = r.top + multY;

    84 		r.right  = r.left + multX;

    85 		memDC.FillRect(&r, &b);

    86 		b.DeleteObject();

    87 	}

    88 

    89 	CPen pen;

    90 	pen.CreatePen(PS_SOLID, 1, RGB(192, 192, 192));

    91 	CPen *old = (CPen *)memDC.SelectObject(&pen);

    92 

    93 	for (i = 0; i < 8; i++)

    94 	{

    95 		memDC.MoveTo(0, i * multY);

    96 		memDC.LineTo(w, i * multY);

    97 		memDC.MoveTo(i * multX, 0);

    98 		memDC.LineTo(i * multX, h);

    99 	}

   100 

   101 	if (selected != -1)

   102 	{

   103 		CPen pen2;

   104 		pen2.CreatePen(PS_SOLID, 2, RGB(255, 0, 0));

   105 		CPen *old2 = (CPen *)memDC.SelectObject(&pen2);

   106 

   107 		int startX = (selected & 7)*multX+1;

   108 		int startY = (selected / 8)*multY+1;

   109 		int endX   = startX + multX-2;

   110 		int endY   = startY + multY-2;

   111 

   112 		memDC.MoveTo(startX, startY);

   113 		memDC.LineTo(endX, startY);

   114 		memDC.LineTo(endX, endY);

   115 		memDC.LineTo(startX, endY);

   116 		memDC.LineTo(startX, startY-1);

   117 		memDC.SelectObject(old2);

   118 		pen2.DeleteObject();

   119 	}

   120 	memDC.SelectObject(old);

   121 	pen.DeleteObject();

   122 

   123 	dc.BitBlt(0, 0, w, h,

   124 	          &memDC, 0, 0, SRCCOPY);

   125 

   126 	memDC.SelectObject(pOldBitmap);

   127 	bitmap.DeleteObject();

   128 	memDC.DeleteDC();

   129 }

   130 

   131 void ZoomControl::OnLButtonDown(UINT nFlags, CPoint point)

   132 {

   133 	RECT rect;

   134 	GetClientRect(&rect);

   135 

   136 	int height = rect.bottom - rect.top;

   137 	int width  = rect.right - rect.left;

   138 

   139 	int multX = width / 8;

   140 	int multY = height / 8;

   141 

   142 	selected = point.x / multX + 8 * (point.y / multY);

   143 

   144 	int c     = point.x / multX + 8 * (point.y/multY);

   145 	u16 color = colors[c*3] << 7 |

   146 	            colors[c*3+1] << 2 |

   147 	            (colors[c*3+2] >> 3);

   148 

   149 	GetParent()->PostMessage(WM_COLINFO,

   150 	                         color,

   151 	                         0);

   152 

   153 	Invalidate();

   154 }

   155 

   156 BOOL ZoomControl::OnEraseBkgnd(CDC*pDC)

   157 {

   158 	return TRUE;

   159 }

   160 

   161 void ZoomControl::setColors(const u8 *c)

   162 {

   163 	memcpy(colors, c, 3*64);

   164 	selected = -1;

   165 	Invalidate();

   166 }
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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