colorpicker.cpp

C++写的编译器,内有详细注释,很好用,可以学习.

				HDC			hDC;
				hDC = ::GetWindowDC(hwndPoint);
				::GetWindowRect(hwndPoint,&rect);
				crtTMPColor = GetPixel(hDC,point.x-rect.left,point.y-rect.top);
				::ReleaseDC(hwndPoint,hDC);
				RECT redrawRect;
				redrawRect.left = 0;
				redrawRect.right = 150;
				redrawRect.top = 120;
				redrawRect.bottom = 145;
				::GetWindowRect(hWnd,&rect);
				if(!rect.PtInRect(point))//不在本窗口
				{
					crtColor = crtTMPColor;
					::InvalidateRect(hWnd,&redrawRect,TRUE);
				}
				else
				{
					rect.bottom = rect.top + 120;
					int iCurrentActiveRect;
					if(rect.PtInRect(point))///判断鼠标是否在当前窗口的色彩区域
					{
						////计算位于哪个方框内////
						point.x -= rect.left;
						point.y -= rect.top;
						if(point.x%10 != 0 && point.y%10 != 0)
							iCurrentActiveRect = point.y/10*19 + point.x/10;
						else
							iCurrentActiveRect = -1;
					}
					else
					{
						iCurrentActiveRect = -1;
						crtColor = oldColor;
						if(hwndColorBtn == hwndPoint)
							::ReleaseCapture();
						else
							bInCtrlArea = TRUE;

					}
					if(iCurrentActiveRect != iActiveRect)
					{
						///清除原焦点
						CRect ActiveRect;
						ActiveRect.left = iActiveRect%19*10;
						ActiveRect.top = iActiveRect/19*10;
						ActiveRect.right = ActiveRect.left + 10;
						ActiveRect.bottom = ActiveRect.top + 10;
						::InvalidateRect(hWnd,&ActiveRect,TRUE);
						///新焦点
						if(iCurrentActiveRect != -1)
						{
							crtColor = crtTMPColor;
							ActiveRect.left = iCurrentActiveRect%19*10;
							ActiveRect.top = iCurrentActiveRect/19*10;
							ActiveRect.right = ActiveRect.left + 10;
							ActiveRect.bottom = ActiveRect.top + 10;
							::InvalidateRect(hWnd,&ActiveRect,TRUE);
						}
						::InvalidateRect(hWnd,&redrawRect,TRUE);
						iActiveRect = iCurrentActiveRect;
					}
				}
			}
		}
		if(bInCtrlArea)
			::PostMessage(hwndParent,WM_SETCURSOR,NULL,MAKELPARAM(1,0));
		else
			::PostMessage(hwndParent,WM_SETCURSOR,NULL,NULL);
		}
		break;
	case WM_ACTIVATE:
		if(LOWORD(wParam) != WA_INACTIVE)
			break;
	case WM_LBUTTONUP:
		point.x = LPARAM_X(lParam);
		point.y = LPARAM_Y(lParam);
		if(bMouseMoved || ( point.x == oldPoint.x && point.y == oldPoint.y ))
			::PostMessage(hwndParent,WM_LBUTTONUP,(UINT)crtColor,lParam);
		break;
	case WM_LBUTTONDOWN:
		oldPoint.x = LPARAM_X(lParam);
		oldPoint.y = LPARAM_Y(lParam);
		bMouseMoved = FALSE;
		::InvalidateRect(hWnd,&crtColorRect,TRUE);
		break;
	case WM_ERASEBKGND:
		{
		hDC = (HDC)wParam;
		HPEN oldPen = (HPEN)::SelectObject(hDC,_penB);
		for(int i=0;i<18;i++)
		{
			::MoveToEx(hDC,9+i*10,0,NULL);
			::LineTo(hDC,9+i*10,120);
		}
		for(i=0;i<12;i++)
		{
			::MoveToEx(hDC,0,9+i*10,NULL);
			::LineTo(hDC,190,9+i*10);
		}
		CRect btmRect(0,120,191,150);
		::FillRect(hDC,btmRect,(HBRUSH)::GetStockObject(LTGRAY_BRUSH));
		::Rectangle(hDC,crtColorRect.left-1,crtColorRect.top-1,crtColorRect.right + 1,crtColorRect.bottom + 1);
		::SelectObject(hDC,oldPen);
		}
		break;
	case WM_PAINT:
		{
		hDC = ::BeginPaint(hWnd,&ps);
		CDC dc;
		dc.Attach(hDC);
		CRect	rect;
		int x1,y1,i,j,k;
		UCHAR R=255,G=255,B=255;
		for(i=0;i<12;i++)
		{
			y1 = i*10;
			rect.SetRect(0,y1,9,y1+9);
			if(i == 10)
				R=G=B=0x17;
			dc.FillSolidRect(rect,RGB(R,G,B));
			R -= 0x17;
			G -= 0x17;
			B -= 0x17;
		}
		R = G = B = 0;
		for(k = 0;k < 2;k++)
		for(j = 0;j < 18;j++)
		for(i = 0;i < 6;i++)
		{
			x1 = 10+j*10;
			y1 = k*60+i*10;
			rect.SetRect(x1,y1,x1+9,y1+9);
			dc.FillSolidRect(rect,RGB(R,G,B));
			if(B == 0xff)
			{
				B = 0x00;
				if(G == 0xff)
				{
					G = 0x00;
					R += 0x33;
				}
				else
					G += 0x33;
			}
			else
				B += 0x33;
		}
		if(iActiveRect != -1)
		{
			CRect ActiveRect;
			ActiveRect.left = iActiveRect%19*10;
			ActiveRect.top = iActiveRect/19*10;
			ActiveRect.right = ActiveRect.left + 10;
			ActiveRect.bottom = ActiveRect.top + 10;
			dc.DrawFocusRect(ActiveRect);
		}
		rect.SetRect(0,y1+130,60,y1+140);
		dc.FillSolidRect(crtColorRect,crtColor);
		char strColor[8]="#";
		sprintf(strColor+1,"%02X%02X%02X",GetRValue(crtColor),GetGValue(crtColor),GetBValue(crtColor));
		HFONT hOldFont = (HFONT)dc.SelectObject(hFont);
		dc.SetBkMode(TRANSPARENT);
		dc.TextOut(80,127,strColor,7);
		dc.SelectObject(hOldFont);
		dc.Detach();
		::EndPaint(hWnd,&ps);
		}
		break;
	default:
		return(::DefWindowProc(hWnd,nMsg,wParam,lParam));
	}
	return NULL;
}

BOOL CColorPicker::CreatePaletteWindow()
{
	if(!m_bPaletteWndActive)
	{
		// 创建调色板子窗口
		WNDCLASS wndcls;
		wndcls.style = CS_HREDRAW | CS_VREDRAW;
		wndcls.lpfnWndProc = PaletteWndProc;
		wndcls.cbClsExtra = wndcls.cbWndExtra = 0;
		wndcls.hInstance = ::AfxGetInstanceHandle();
		wndcls.hIcon = NULL;
		wndcls.hCursor = NULL;
		wndcls.hbrBackground = (HBRUSH)::GetStockObject(WHITE_BRUSH);
		wndcls.lpszMenuName = NULL;
		wndcls.lpszClassName = "ColorPalette";
		if (!::RegisterClass(&wndcls))
			AfxThrowResourceException();
		HDC hDC = ::GetDC(m_hWnd);
		int scrWidth = ::GetDeviceCaps(hDC,HORZRES);
		int scrHeight = ::GetDeviceCaps(hDC,VERTRES);
		::ReleaseDC(m_hWnd,hDC);
		CRect		rect;
		GetWindowRect(rect);
		rect.top = rect.bottom - 1;
		if(rect.left > scrWidth-191)
			rect.left = scrWidth-191;
		else if(rect.left < 0)
			rect.left = 0;
		if(rect.top > scrHeight-150)
			rect.top = rect.top-150;
		rect.bottom = rect.top + 150;
		rect.right = rect.left + 191;

		if(!(m_hPaletteWnd = ::CreateWindowEx(WS_EX_TOPMOST,"ColorPalette","Palatte",WS_POPUP|WS_BORDER|WS_VISIBLE,rect.left,rect.top,rect.Width(),rect.Height(),m_hWnd,NULL,wndcls.hInstance,NULL)))
			return FALSE;
	}
	::PostMessage(m_hPaletteWnd,WM_SETCOLOR,(WPARAM)m_CurrentColor,NULL);
	::ShowWindow(m_hPaletteWnd,SW_SHOW);
	::SetCapture(m_hPaletteWnd);
	m_bPaletteWndActive = TRUE;
	return TRUE;
}

void CColorPicker::DestroyPaletteWindow()
{
	::DestroyWindow(m_hPaletteWnd);
	::UnregisterClass("ColorPalette",::AfxGetInstanceHandle());
	m_bPaletteWndActive = FALSE;
	m_hPaletteWnd = NULL;
}

BOOL CColorPicker::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	if(m_bPaletteWndActive && m_hCursorStraw && nHitTest != 1)
		::SetCursor(m_hCursorStraw);
	else
		::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW));
	return TRUE;
}

void CColorPicker::GetColor(CString& strColor)
{
	char cColor[8]="#";
	sprintf(cColor+1,"%02X%02X%02X",GetRValue(m_CurrentColor),GetGValue(m_CurrentColor),GetBValue(m_CurrentColor));
	strColor = cColor;
}

COLORREF CColorPicker::GetColor()
{
	return m_CurrentColor;
}

LRESULT CColorPicker::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
	if(message == WM_COLORDLG)
	{
		DestroyPaletteWindow();
		CColorDialog dlg;
		dlg.m_cc.Flags |= CC_FULLOPEN;
		if(dlg.DoModal() == IDOK)
			SetColor(dlg.GetColor());
		return TRUE;
	}
	else
		return CButton::DefWindowProc(message, wParam, lParam);
}

void CColorPicker::SetBuddy(HWND hWnd)
{
	m_hwndBuddy = hWnd;
}

void CColorPicker::SetColor(COLORREF ref)
{
	m_CurrentColor = ref;
	::PostMessage(GetParent()->m_hWnd,WM_COMMAND,MAKELPARAM(::GetWindowLong(m_hWnd,GWL_ID),BN_CLICKED),(LPARAM)m_hWnd);
	if(m_hwndBuddy)
	{
		CString strColor;
		GetColor(strColor);
		::SetWindowText(m_hwndBuddy,strColor);
	}
	Invalidate();
}