noteedit.h

一个提示软件

// NoteEdit.h: interface for the CNoteEdit class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_NOTEEDIT_H__5FE9A853_AFE7_4DB9_8AE9_074DB729D6AF__INCLUDED_)
#define AFX_NOTEEDIT_H__5FE9A853_AFE7_4DB9_8AE9_074DB729D6AF__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CNoteEdit : public CWindowImpl<CNoteEdit, CRichEditCtrl>,
					public CRichEditCommands<CNoteEdit>
{
private:
	COLORREF m_clrBkgnd;	// background color
	CFont m_fontEdit;		// font used by the edit control
	CMenu m_menuEdit;		// context menu
	HCURSOR m_hCursor;

public:
	DECLARE_WND_SUPERCLASS(NULL, CRichEditCtrl::GetWndClassName())

	BOOL PreTranslateMessage(MSG* pMsg)
	{
		pMsg;
		return FALSE;
	}

	virtual BOOL OnIdle()
	{
		return FALSE;
	}

	CNoteEdit()
	{
		ATLTRACE(_T("CNoteEdit::CNoteEdit()\n"));
		m_hCursor = NULL;
	}

	~CNoteEdit() 
	{
		ATLTRACE(_T("CNoteEdit::~CNoteEdit()\n"));

		if (m_fontEdit.m_hFont)
			m_fontEdit.DeleteObject();
		
		if (m_menuEdit.m_hMenu != NULL)
			m_menuEdit.DestroyMenu();
	}

	BEGIN_MSG_MAP(CNoteEdit)
		// Take care of unhandled reflected messages
		DEFAULT_REFLECTION_HANDLER()
		MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBkgnd)
		MESSAGE_HANDLER(WM_RBUTTONDOWN, OnRButtonDown)
		MESSAGE_HANDLER(WM_INITMENUPOPUP, OnInitMenuPopup)
		CHAIN_MSG_MAP_ALT(CRichEditCommands<CNoteEdit>, 1)
	END_MSG_MAP()

	// Changes the control's background color
	void ChangeBkgndColor(COLORREF clrColor)
	{
		ATLTRACE(_T("CNoteEdit::ChangeBkgndColor()\n"));

		m_clrBkgnd = clrColor;
		SetBackgroundColor(m_clrBkgnd);
	}

	// Changes font
	void ChangeFont(LOGFONT * plfNote)
	{
		ATLTRACE(_T("CNoteEdit::ChangeFont()\n"));
		ATLASSERT(m_fontEdit.m_hFont);

		// Show the font dialog with 12 point "Times New Roman" as the selected font.
		LOGFONT lf;
		memset(&lf, 0, sizeof(lf));

		CClientDC dc(m_hWnd);
		lf.lfHeight = -MulDiv(12, dc.GetDeviceCaps(LOGPIXELSY), 72);
		lstrcpy(lf.lfFaceName, _T("Times New Roman"));

		CFontDialog dlg(&lf);

		if (dlg.DoModal() == IDOK)		// success
		{
			// Delete the old font and create the new one
			m_fontEdit.DeleteObject();
			if (m_fontEdit.CreateFontIndirect(&dlg.m_lf))
			{
				// Change the edit control's current font
				SetFont(m_fontEdit);	
				// Return the LOGFONT structure
				*plfNote = dlg.m_lf;
			}
			else
				ATLTRACE(_T("New font was not created successfully!\n"));
		}
		else
			ATLTRACE(_T("Font dialog was not created successfully!\n"));
	}

	// Sets edit control's font
	void SetNoteFont(string strFontName, LONG lFontHeight, LONG lWeight, BYTE btItalic)
	{
		ATLTRACE(_T("CNoteEdit::SetNoteFont()\n"));

		LOGFONT lf;
		memset(&lf, 0, sizeof(lf));

		lstrcpy(lf.lfFaceName, strFontName.c_str());
		lf.lfHeight = lFontHeight;
		lf.lfWeight = lWeight;
		lf.lfItalic = btItalic;

		// Create a new font
		m_fontEdit.CreateFontIndirect(&lf);
		ATLASSERT(m_fontEdit.m_hFont);

		SetFont(m_fontEdit);
	}

	LRESULT OnEraseBkgnd(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
	{
		ATLTRACE(_T("CNoteEdit::OnEraseBkgnd()\n"));

		// Eliminate the flicker during resizing
		return 1;
	}

	LRESULT OnRButtonDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
	{
		ATLTRACE(_T("CNoteEdit::OnRButtonDown()\n"));

		// Cursor's horizontal and vertical position
		CPoint pt(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)); 

		// Convert client coordinates to screen coordinates 
		ClientToScreen(&pt);

		// Load the menu resource 
		if (!m_menuEdit.LoadMenu(IDR_CONTEXTMENU))
		{
			ATLTRACE(_T("Menu resource was not loaded successfully!\n"));
			return 0;
		}

		// TrackPopupMenu cannot display the menu bar so get 
		// a handle to the first shortcut menu. 
 		CMenuHandle menuPopup = m_menuEdit.GetSubMenu(0);
		if (menuPopup.m_hMenu == NULL)
		{
			ATLTRACE(_T("Submenu was not retrieved successfully!\n"));
			return 0;
		}

		// Display the shortcut menu
 		if (!menuPopup.TrackPopupMenu(TPM_LEFTALIGN|TPM_TOPALIGN|TPM_LEFTBUTTON,
								pt.x, pt.y, m_hWnd))
		{
			ATLTRACE(_T("Context menu was not displayed successfully!\n"));
			return 0;
		}		

		// Destroy the menu and free any memory that the menu occupies
		menuPopup.DestroyMenu();
		m_menuEdit.DestroyMenu();
		m_menuEdit.m_hMenu = NULL;
		return 0;
	}

	// Modifies the menu before it is displayed
	LRESULT OnInitMenuPopup(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/)
	{
		ATLTRACE(_T("CNoteEdit::OnInitMenuPopup()\n"));

		HMENU hMenuPopup = (HMENU)wParam;
		int nPos;
		UINT uId;

		// Set the cursor shape to an arrow
		m_hCursor = ::LoadCursor(NULL, IDC_ARROW);
		ATLASSERT(m_hCursor);
		::SetCursor(m_hCursor);

		int  nMenuItems = GetMenuItemCount(hMenuPopup); 

		for (nPos = 0; nPos < nMenuItems; nPos++) 
		{ 
			uId = GetMenuItemID(hMenuPopup, nPos); 

			switch (uId) 
			{ 
			case ID_EDIT_UNDO:
				EnableMenuItem(hMenuPopup, uId, CanUndo() ?
											MF_BYCOMMAND | MF_ENABLED : 
											MF_BYCOMMAND | MF_GRAYED);
				break;
			case ID_EDIT_SELECT_ALL:
				EnableMenuItem(hMenuPopup, uId, (GetWindowTextLength() > 0) ?
											MF_BYCOMMAND | MF_ENABLED : 
											MF_BYCOMMAND | MF_GRAYED);
				break;
			case ID_EDIT_CUT: 
			case ID_EDIT_COPY: 
			case ID_EDIT_CLEAR: 
				EnableMenuItem(hMenuPopup, uId, HasSelection() ?
											MF_BYCOMMAND | MF_ENABLED : 
											MF_BYCOMMAND | MF_GRAYED);
				break; 
			case ID_EDIT_PASTE: 
				EnableMenuItem(hMenuPopup, uId, IsClipboardFormatAvailable(CF_TEXT) ? 
											MF_BYCOMMAND | MF_ENABLED : 
											MF_BYCOMMAND | MF_GRAYED);
				break;
			default:
				break;
			}
		} 

		return 0;
	}
};

#endif // !defined(AFX_NOTEEDIT_H__5FE9A853_AFE7_4DB9_8AE9_074DB729D6AF__INCLUDED_)