macbuttons.cpp

这是我仿照串口助手（龚建伟）作的一个例子并修正了其中的一些bug

// Return Value:	None.
//
// Parameters	:	None.
//
// Remarks		:	Invalidates the check rectangle of a radio button or check box.
//
{
	CRect rect;
	GetClientRect(rect);
	InvalidateRect(GetCheckRect(rect, GetStyle()));
}	// RedrawCheck

//-------------------------------------------------------------------
//
void CMacButton::DrawButtonText(CDC *pDC, CRect &rect, const CString &sText, UINT nStyle, UINT nState)
//
// Return Value:	None.
//
// Parameters	:	pDC - A pointer to the DC being drawn on.
//						rect - The button's rectangle.
//						sText - The button's text.
//						nStyle - The button's style.
//						nState - The button's state.
//
// Remarks		:	Draws the text on the button.
//
{
	CFont *pFont = GetFont();
	CFont *pOldFont = (CFont *)pDC->SelectObject(pFont);
	CFont fontBold;

	if (m_bBold)
	{
		LOGFONT lf;
		pFont->GetLogFont(&lf);
		lf.lfWeight = FW_BOLD;
		fontBold.CreateFontIndirect(&lf);
		pDC->SelectObject(&fontBold);
	}
	

	CSize sizeText = pDC->GetTextExtent(sText);

	// Determine the rect for the text.
	if ((m_nType == TYPE_STANDARD) || (nStyle & BS_PUSHLIKE))
	{
		if (nStyle & BS_LEFT)
			rect.left += 5;
		else if (nStyle & BS_RIGHT)
			rect.left = rect.right - sizeText.cx - 5;
		else
			rect.left = (rect.Width() - sizeText.cx) >> 1;
		rect.right = rect.left + sizeText.cx;

		if (nStyle & BS_TOP)
			rect.top += (m_nType == TYPE_RADIO? 4 : 5);
		else if (nStyle & BS_BOTTOM)
			rect.top = rect.bottom - sizeText.cy - 5;
		else
			rect.top = (rect.Height() - sizeText.cy) >> 1;
		rect.bottom = rect.top + sizeText.cy;
	}
	else
	{
		if (nStyle & BS_LEFT)
			rect.left = (nStyle & BS_LEFTTEXT ? 2 : CHECKBOX_HEIGHT + 5);
		else if (nStyle & BS_RIGHT)
			rect.left = rect.right - sizeText.cx - (nStyle & BS_LEFTTEXT ? CHECKBOX_HEIGHT + 10 : 5);
		else
		{
			if (m_nType == TYPE_CHECKBOX || m_nType == TYPE_RADIO)
				rect.left = (nStyle & BS_LEFTTEXT ? 2 : CHECKBOX_HEIGHT + 5);
			else
				rect.left = (rect.Width() - sizeText.cx) >> 1;
		}
		rect.right = rect.left + sizeText.cx + (nStyle & BS_LEFTTEXT ? 2 : 0);

		if (nStyle & BS_TOP)
			rect.top = rect.top;
		else if (nStyle & BS_BOTTOM)
			rect.top = rect.bottom - sizeText.cy - 3;
		else
			rect.top = ((rect.Height() - sizeText.cy) >> 1) - 1;
		rect.bottom = rect.top + sizeText.cy;
	}

	if (((m_nType == TYPE_STANDARD) && (nState & ODS_SELECTED)) || 
		 (nStyle & BS_PUSHLIKE) && (m_bMouseDown || ((nStyle & BS_FLAT) && m_nCheck)))
		pDC->SetTextColor(m_crHilight);
	if ((m_nType == TYPE_CHECKBOX) && (nStyle & BS_PUSHLIKE) && (m_nCheck == 2))
		pDC->SetTextColor(m_crShadow);

	// Draw the text.
	pDC->SetBkMode(TRANSPARENT);
	if (nState & ODS_DISABLED)
	{
		pDC->SetTextColor(m_crShadow);
		pDC->DrawText(sText, rect, DT_CENTER);
	}
	else
		pDC->DrawText(sText, rect, DT_CENTER);

	// Restore the original font.
	pDC->SelectObject(pOldFont);
	if (m_bBold)
		fontBold.DeleteObject();

}	// DrawButtonText

//-------------------------------------------------------------------
//
void CMacButton::SetImageEffect(int nEffect)
//
// Return Value:	None.
//
// Parameters	:	nEffect - The effect to add when drawing the image.
//							Can be one of the following values: 
//							- IMAGE_EFFECT_NONE - No effect is added to the image.
//							- IMAGE_EFFECT_RAISED - The image will appear raised.
//							- IMAGE_EFFECT_SUNKEN - The image will appear sunken.
//
// Remarks		:	Sets the image effect member.
//
{
	m_nImageEffect = nEffect;	
	RedrawWindow();
}	// SetImageEffect

//-------------------------------------------------------------------
//
void CMacButton::SetCheck(int nCheck)
//
// Return Value:	None.
//
// Parameters	:	nCheck - Specifies the check state. This parameter 
//							can be one of the following:
//							Value	Meaning 
//							0		Set the button state to unchecked. 
//							1		Set the button state to checked. 
//							2		Set the button state to indeterminate.
//
// Remarks		:	Sets or resets the check state of a radio button or 
//						check box. This member function has no effect on a pushbutton.
//
{
	if (m_nType == TYPE_STANDARD)
		return;

	int nOldCheck = m_nCheck;

	m_nCheck = nCheck;

	if (m_nCheck != nOldCheck)
	{
		if (GetStyle() & BS_PUSHLIKE)
			RedrawWindow();
		else
			RedrawCheck();
	}
}	// SetCheck

//-------------------------------------------------------------------
//
int CMacButton::GetCheck() const
//
// Return Value:	1 if checked, 0 otherwise.
//
// Parameters	:	None.
//
// Remarks		:	Retrieves the check state of button.
//
{
	return m_nCheck;
}	// GetCheck

//-------------------------------------------------------------------
//
void CMacButton::SetBold(BOOL bBold /*= TRUE*/)
//
// Return Value:	None.
//
// Parameters	:	bBold - Used to sed the m_bBold flag. Default value: TRUE.
//
// Remarks		:	Sets the m_bBold flag.
//
{
	m_bBold = bBold;
	RedrawWindow();
}	// SetBold

//-------------------------------------------------------------------
//
BOOL CMacButton::GetBold() const
//
// Return Value:	The bold flag.
//
// Parameters	:	None.
//
// Remarks		:	Returns the bold flag.
//
{
	return m_bBold;
}	// GetBold

/////////////////////////////////////////////////////////////////////////////
//
//	CMacCheckBox class, version 2.0
//
//	Copyright (c) 1999, 2000 Paul M. Meidinger ([e-mail])
//
// Thanks to:
//		Eric Hwang <[e-mail]>
//			For fixing the problem that was not sending a message
//			to the parent when the button was clicked.
//
//	History:
//		PMM	12/13/1999		Initial implementation.		
//
//		PMM	12/17/1999		Modified drawing code to use a memory DC. 
//									Added CPen member variables in an attempt to 
//									speed up drawing. Made other minor changes.
//
//		PMM	12/29/1999		Fixed a bug that would not send a message to the parent
//									when the button was clicked (fix by Eric Hwang). Added
//									code to draw a push-like button when that style is used.
//
/////////////////////////////////////////////////////////////////////////////

//-------------------------------------------------------------------
//
CMacCheckBox::CMacCheckBox()
	: CMacButton()
//
// Return Value:	None.
//
// Parameters	:	None.
//
// Remarks		:	Standard constructor.
//
{
	m_nType = TYPE_CHECKBOX;
	m_nCheckStyle = CHECK_STYLE_CHECK;
}	// CMacCheckBox

//-------------------------------------------------------------------
//
CMacCheckBox::~CMacCheckBox()
//
// Return Value:	None.
//
// Parameters	:	None.
//
// Remarks		:	Destructor. Does nothing.
//
{
}	// ~CMacCheckBox


BEGIN_MESSAGE_MAP(CMacCheckBox, CMacButton)
	//{{AFX_MSG_MAP(CMacCheckBox)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_KEYUP()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDBLCLK()
	ON_WM_KEYDOWN()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMacCheckBox message handlers

//-------------------------------------------------------------------
//
void CMacCheckBox::DrawItem(LPDRAWITEMSTRUCT lpDIS) 
//
// Return Value:	None.
//
// Parameters	:	lpDIS - A long pointer to a DRAWITEMSTRUCT structure.
//
// Remarks		:	Called by the framework when a visual aspect of an 
//						owner-drawn button has changed.
//
{
	DrawButton(lpDIS);
}	// DrawItem

//-------------------------------------------------------------------
//
void CMacCheckBox::OnLButtonUp(UINT /*nFlags*/, CPoint point) 
//
// Return Value:	None.
//
// Parameters	:	nFlags - Indicates whether various virtual keys are down. 
//						point - Specifies the x- and y-coordinate of the cursor. 
//							These coordinates are always relative to the upper-left 
//							corner of the window.
//
// Remarks		:	The framework calls this member function when the user 
//						releases the left mouse button. Checks to see if the mouse
//						was released over the button. If so, check it.
//
{
	ReleaseCapture();

	UINT nStyle = GetStyle();

	if (!(nStyle & BS_AUTOCHECKBOX))
		return;

	CRect rect;
	GetClientRect(rect);

	if (rect.PtInRect(point))
	{
		m_nCheck = (m_nCheck == 0 ? 1 : 0);

		// Send notify message to parent window.
		// Added by Eric Hwang.
		GetParent()->SendMessage(WM_COMMAND, MAKEWPARAM(GetDlgCtrlID(), BN_CLICKED), (LPARAM)GetSafeHwnd());
	}

	m_bMouseDown = FALSE;

	if (nStyle & BS_PUSHLIKE)
		RedrawWindow();
	else
		RedrawCheck();
}	// OnLButtonUp

//-------------------------------------------------------------------
//
void CMacCheckBox::OnLButtonDown(UINT /*nFlags*/, CPoint /*point*/) 
//
// Return Value:	None.
//
// Parameters	:	nFlags - Indicates whether various virtual keys are down. 
//						point - Specifies the x- and y-coordinate of the cursor. 
//							These coordinates are always relative to the upper-left 
//							corner of the window.
//
// Remarks		:	The framework calls this member function when the user 
//						presses the left mouse button. Sets focus to this button,
//						captures the mouse, and redraws the check.
//
{
	m_bMouseDown = TRUE;
	SetFocus();
	SetCapture();

	if (GetStyle() & BS_PUSHLIKE)
		RedrawWindow();
	else
		RedrawCheck();
}	// OnLButtonDown 

//-------------------------------------------------------------------
//
void CMacCheckBox::OnLButtonDblClk(UINT /*nFlags*/, CPoint point) 
//
// Return Value:	None.
//
// Parameters	:	nFlags - Indicates whether various virtual keys are down.
//						point - Specifies the x- and y-coordinate of the cursor. 
//							These coordinates are always relative to the upper-left
//							 corner of the window.
//
// Remarks		:	The framework calls this member function when the user 
//						double-clicks the left mouse button. The WM_LBUTTONDOWN
//						message is sent to simulate a single click.
//
{
	SendMessage(WM_LBUTTONDOWN, 0, MAKELPARAM(point.x, point.y));	
}	// OnLButtonDblClk

//-------------------------------------------------------------------
//
void CMacCheckBox::OnMouseMove(UINT /*nFlags*/, CPoint point) 
//
// Return Value:	None.
//
// Parameters	:	nFlags - Indicates whether various virtual keys are down. 
//						point - Specifies the x- and y-coordinate of the cursor. 
//							These coordinates are always relative to the upper-left 
//							corner of the window.
//
// Remarks		:	The framework calls this member function when the 
//						mouse cursor moves. Checks to see if the mouse is over
//						the button, and redraws the check if it is, but wasn't previously.
//
{
	if (GetCapture() != this)
		return;

	BOOL bWasMouseDown = m_bMouseDown;

	CRect rect;
	GetClientRect(rect);
	m_bMouseDown = rect.PtInRect(point);

	if (bWasMouseDown != m_bMouseDown)
	{
		if (GetStyle() & BS_PUSHLIKE)
			RedrawWindow();
		else
			RedrawCheck();
	}
}	// OnMouseMove

//-------------------------------------------------------------------
//
void CMacCheckBox::OnKeyUp(UINT nChar, UINT /*nRepCnt*/, UINT /*nFlags*/) 
//
// Return Value:	None.
//
// Parameters	:	nChar - Specifies the virtual-key code of the given key.
//						nRepCnt - Repeat count (the number of times the keystroke
//							is repeated as a result of the user holding down the key).
//						nFlags - Specifies the scan code, key-transition code, previous 
//							key state, and context code
//
// Remarks		:	The framework calls this member function when a nonsystem 
//						key is released. Checks/unchecks the button when the space bar
//						is pressed.
//
{		
	if (nChar == VK_SPACE)
	{
		m_bMouseDown = FALSE;
		m_nCheck = (m_nCheck == 0 ? 1 : 0);

		// Send notify message to parent window.
		// Added by Eric Hwang.
		GetParent()->SendMessage(WM_COMMAND, MAKEWPARAM(GetDlgCtrlID(), BN_CLICKED), (LPARAM)GetSafeHwnd());

		if (GetStyle() & BS_PUSHLIKE)
			RedrawWindow();
		else
			RedrawCheck();