btnst.cpp

一款自已开发的贪吃蛇游戏

	short	shOffsetB = shOffset;

	if (byColorIndex >= BTNST_MAX_COLORS)	return BTNST_INVALIDINDEX;
	if (shOffset < -255 || shOffset > 255)	return BTNST_BADPARAM;

	// Get RGB components of specified color
	byRed = GetRValue(m_crColors[byColorIndex]);
	byGreen = GetGValue(m_crColors[byColorIndex]);
	byBlue = GetBValue(m_crColors[byColorIndex]);

	// Calculate max. allowed real offset
	if (shOffset > 0)
	{
		if (byRed + shOffset > 255)		shOffsetR = 255 - byRed;
		if (byGreen + shOffset > 255)	shOffsetG = 255 - byGreen;
		if (byBlue + shOffset > 255)	shOffsetB = 255 - byBlue;

		shOffset = min(min(shOffsetR, shOffsetG), shOffsetB);
	} // if
	else
	{
		if (byRed + shOffset < 0)		shOffsetR = -byRed;
		if (byGreen + shOffset < 0)		shOffsetG = -byGreen;
		if (byBlue + shOffset < 0)		shOffsetB = -byBlue;

		shOffset = max(max(shOffsetR, shOffsetG), shOffsetB);
	} // else

	// Set new color
	m_crColors[byColorIndex] = RGB(byRed + shOffset, byGreen + shOffset, byBlue + shOffset);

	if (bRepaint)	Invalidate();

	return BTNST_OK;
} // End of OffsetColor

// This function sets the hilight logic for the button.
// Applies only to flat buttons.
//
// Parameters:
//		[IN]	bAlwaysTrack
//				If TRUE the button will be hilighted even if the window that owns it, is
//				not the active window.
//				If FALSE the button will be hilighted only if the window that owns it,
//				is the active window.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
DWORD CButtonST::SetAlwaysTrack(BOOL bAlwaysTrack)
{
	m_bAlwaysTrack = bAlwaysTrack;
	return BTNST_OK;
} // End of SetAlwaysTrack

// This function sets the cursor to be used when the mouse is over the button.
//
// Parameters:
//		[IN]	nCursorId
//				ID number of the cursor resource.
//				Pass NULL to remove a previously loaded cursor.
//		[IN]	bRepaint
//				If TRUE the control will be repainted.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//		BTNST_INVALIDRESOURCE
//			Failed loading the specified resource.
//
DWORD CButtonST::SetBtnCursor(int nCursorId, BOOL bRepaint)
{
	HINSTANCE	hInstResource = NULL;
	// Destroy any previous cursor
	if (m_hCursor)
	{
		::DestroyCursor(m_hCursor);
		m_hCursor = NULL;
	} // if

	// Load cursor
	if (nCursorId)
	{
		hInstResource = AfxFindResourceHandle(MAKEINTRESOURCE(nCursorId), RT_GROUP_CURSOR);
		// Load cursor resource
		m_hCursor = (HCURSOR)::LoadImage(hInstResource, MAKEINTRESOURCE(nCursorId), IMAGE_CURSOR, 0, 0, 0);
		// Repaint the button
		if (bRepaint) Invalidate();
		// If something wrong
		if (m_hCursor == NULL) return BTNST_INVALIDRESOURCE;
	} // if

	return BTNST_OK;
} // End of SetBtnCursor

// This function sets if the button border must be drawn.
// Applies only to flat buttons.
//
// Parameters:
//		[IN]	bDrawBorder
//				If TRUE the border will be drawn.
//		[IN]	bRepaint
//				If TRUE the control will be repainted.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
DWORD CButtonST::DrawBorder(BOOL bDrawBorder, BOOL bRepaint)
{
	m_bDrawBorder = bDrawBorder;
	// Repaint the button
	if (bRepaint) Invalidate();

	return BTNST_OK;
} // End of DrawBorder

// This function sets if the focus rectangle must be drawn for flat buttons.
//
// Parameters:
//		[IN]	bDrawFlatFocus
//				If TRUE the focus rectangle will be drawn also for flat buttons.
//		[IN]	bRepaint
//				If TRUE the control will be repainted.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
DWORD CButtonST::DrawFlatFocus(BOOL bDrawFlatFocus, BOOL bRepaint)
{
	m_bDrawFlatFocus = bDrawFlatFocus;
	// Repaint the button
	if (bRepaint) Invalidate();

	return BTNST_OK;
} // End of DrawFlatFocus

void CButtonST::InitToolTip()
{
	if (m_ToolTip.m_hWnd == NULL)
	{
		// Create ToolTip control
		m_ToolTip.Create(this);
		// Create inactive
		m_ToolTip.Activate(FALSE);
		// Enable multiline
		m_ToolTip.SendMessage(TTM_SETMAXTIPWIDTH, 0, 400);
	} // if
} // End of InitToolTip

// This function sets the text to show in the button tooltip.
//
// Parameters:
//		[IN]	nText
//				ID number of the string resource containing the text to show.
//		[IN]	bActivate
//				If TRUE the tooltip will be created active.
//
void CButtonST::SetTooltipText(int nText, BOOL bActivate)
{
	CString sText;

	// Load string resource
	sText.LoadString(nText);
	// If string resource is not empty
	if (sText.IsEmpty() == FALSE) SetTooltipText((LPCTSTR)sText, bActivate);
} // End of SetTooltipText

// This function sets the text to show in the button tooltip.
//
// Parameters:
//		[IN]	lpszText
//				Pointer to a null-terminated string containing the text to show.
//		[IN]	bActivate
//				If TRUE the tooltip will be created active.
//
void CButtonST::SetTooltipText(LPCTSTR lpszText, BOOL bActivate)
{
	// We cannot accept NULL pointer
	if (lpszText == NULL) return;

	// Initialize ToolTip
	InitToolTip();

	// If there is no tooltip defined then add it
	if (m_ToolTip.GetToolCount() == 0)
	{
		CRect rectBtn; 
		GetClientRect(rectBtn);
		m_ToolTip.AddTool(this, lpszText, rectBtn, 1);
	} // if

	// Set text for tooltip
	m_ToolTip.UpdateTipText(lpszText, this, 1);
	m_ToolTip.Activate(bActivate);
} // End of SetTooltipText

// This function enables or disables the button tooltip.
//
// Parameters:
//		[IN]	bActivate
//				If TRUE the tooltip will be activated.
//
void CButtonST::ActivateTooltip(BOOL bActivate)
{
	// If there is no tooltip then do nothing
	if (m_ToolTip.GetToolCount() == 0) return;

	// Activate tooltip
	m_ToolTip.Activate(bActivate);
} // End of EnableTooltip

// This function returns if the button is the default button.
//
// Return value:
//		TRUE
//			The button is the default button.
//		FALSE
//			The button is not the default button.
//
BOOL CButtonST::GetDefault()
{
	return m_bIsDefault;
} // End of GetDefault

// This function enables the transparent mode.
// Note: this operation is not reversible.
// DrawTransparent should be called just after the button is created.
// Do not use trasparent buttons until you really need it (you have a bitmapped
// background) since each transparent button makes a copy in memory of its background.
// This may bring unnecessary memory use and execution overload.
//
// Parameters:
//		[IN]	bRepaint
//				If TRUE the control will be repainted.
//
void CButtonST::DrawTransparent(BOOL bRepaint)
{
	m_bDrawTransparent = TRUE;

	// Restore old bitmap (if any)
	if (m_dcBk.m_hDC != NULL && m_pbmpOldBk != NULL)
	{
		m_dcBk.SelectObject(m_pbmpOldBk);
	} // if

	m_bmpBk.DeleteObject();
	m_dcBk.DeleteDC();

	// Repaint the button
	if (bRepaint) Invalidate();
} // End of DrawTransparent

DWORD CButtonST::SetBk(CDC* pDC)
{
	if (m_bDrawTransparent && pDC)
	{
		// Restore old bitmap (if any)
		if (m_dcBk.m_hDC != NULL && m_pbmpOldBk != NULL)
		{
			m_dcBk.SelectObject(m_pbmpOldBk);
		} // if

		m_bmpBk.DeleteObject();
		m_dcBk.DeleteDC();

		CRect rect;
		CRect rect1;

		GetClientRect(rect);

		GetWindowRect(rect1);
		GetParent()->ScreenToClient(rect1);

		m_dcBk.CreateCompatibleDC(pDC);
		m_bmpBk.CreateCompatibleBitmap(pDC, rect.Width(), rect.Height());
		m_pbmpOldBk = m_dcBk.SelectObject(&m_bmpBk);
		m_dcBk.BitBlt(0, 0, rect.Width(), rect.Height(), pDC, rect1.left, rect1.top, SRCCOPY);

		return BTNST_OK;
	} // if

	return BTNST_BADPARAM;
} // End of SetBk

// This function sets the URL that will be opened when the button is clicked.
//
// Parameters:
//		[IN]	lpszURL
//				Pointer to a null-terminated string that contains the URL.
//				Pass NULL to removed any previously specified URL.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
DWORD CButtonST::SetURL(LPCTSTR lpszURL)
{
	// Remove any existing URL
	memset(m_szURL, 0, sizeof(m_szURL));

	if (lpszURL)
	{
		// Store the URL
		_tcsncpy(m_szURL, lpszURL, _MAX_PATH);
	} // if

	return BTNST_OK;
} // End of SetURL





// This function resizes the button to the same size of the image.
// To get good results both the IN and OUT images should have the same size.
//
void CButtonST::SizeToContent()
{
	if (m_csIcons[0].hIcon)
	{
		m_ptImageOrg.x = 0;
		m_ptImageOrg.y = 0;
	    SetWindowPos(	NULL, -1, -1, m_csIcons[0].dwWidth, m_csIcons[0].dwHeight,
						SWP_NOMOVE | SWP_NOZORDER | SWP_NOREDRAW | SWP_NOACTIVATE);
	} // if
	else
	if (m_csBitmaps[0].hBitmap)
	{
		m_ptImageOrg.x = 0;
		m_ptImageOrg.y = 0;
	    SetWindowPos(	NULL, -1, -1, m_csBitmaps[0].dwWidth, m_csBitmaps[0].dwHeight,
						SWP_NOMOVE | SWP_NOZORDER | SWP_NOREDRAW | SWP_NOACTIVATE);
	} // if
} // End of SizeToContent

// This function sets the sound that must be played on particular button states.
//
// Parameters:
//		[IN]	lpszSound
//				A string that specifies the sound to play.
//				If hMod is NULL this string is interpreted as a filename, else it
//				is interpreted as a resource identifier.
//				Pass NULL to remove any previously specified sound.
//		[IN]	hMod
//				Handle to the executable file that contains the resource to be loaded.
//				This parameter must be NULL unless lpszSound specifies a resource identifier.
//		[IN]	bPlayOnClick
//				TRUE if the sound must be played when the button is clicked.
//				FALSE if the sound must be played when the mouse is moved over the button.
//		[IN]	bPlayAsync
//				TRUE if the sound must be played asynchronously.
//				FALSE if the sound must be played synchronously. The application takes control
//				when the sound is completely played.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
#ifdef	BTNST_USE_SOUND
DWORD CButtonST::SetSound(LPCTSTR lpszSound, HMODULE hMod, BOOL bPlayOnClick, BOOL bPlayAsync)
{
	BYTE	byIndex = bPlayOnClick ? 1 : 0;

	// Store new sound
	if (lpszSound)
	{
		if (hMod)	// From resource identifier ?
		{
			m_csSounds[byIndex].lpszSound = lpszSound;
		} // if
		else
		{
			_tcscpy(m_csSounds[byIndex].szSound, lpszSound);
			m_csSounds[byIndex].lpszSound = m_csSounds[byIndex].szSound;
		} // else

		m_csSounds[byIndex].hMod = hMod;
		m_csSounds[byIndex].dwFlags = SND_NODEFAULT | SND_NOWAIT;
		m_csSounds[byIndex].dwFlags |= hMod ? SND_RESOURCE : SND_FILENAME;
		m_csSounds[byIndex].dwFlags |= bPlayAsync ? SND_ASYNC : SND_SYNC;
	} // if
	else
	{
		// Or remove any existing
		::ZeroMemory(&m_csSounds[byIndex], sizeof(STRUCT_SOUND));
	} // else

	return BTNST_OK;
} // End of SetSound
#endif

// This function is called every time the button background needs to be painted.
// If the button is in transparent mode this function will NOT be called.
// This is a virtual function that can be rewritten in CButtonST-derived classes
// to produce a whole range of buttons not available by default.
//
// Parameters:
//		[IN]	pDC
//				Pointer to a CDC object that indicates the device context.
//		[IN]	pRect
//				Pointer to a CRect object that indicates the bounds of the
//				area to be painted.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
DWORD CButtonST::OnDrawBackground(CDC* pDC, LPCRECT pRect)
{
	COLORREF	crColor;

	if (m_bMouseOnButton || m_bIsPressed)
		crColor = m_crColors[BTNST_COLOR_BK_IN];
	else
	{
		if (m_bIsFocused)
			crColor = m_crColors[BTNST_COLOR_BK_FOCUS];
		else
			crColor = m_crColors[BTNST_COLOR_BK_OUT];
	} // else

	CBrush		brBackground(crColor);

	pDC->FillRect(pRect, &brBackground);

	return BTNST_OK;
} // End of OnDrawBackground

// This function is called every time the button border needs to be painted.
// If the button is in standard (not flat) mode this function will NOT be called.
// This is a virtual function that can be rewritten in CButtonST-derived classes
// to produce a whole range of buttons not available by default.
//
// Parameters:
//		[IN]	pDC
//				Pointer to a CDC object that indicates the device context.
//		[IN]	pRect
//				Pointer to a CRect object that indicates the bounds of the
//				area to be painted.
//
// Return value:
//		BTNST_OK
//			Function executed successfully.
//
DWORD CButtonST::OnDrawBorder(CDC* pDC, LPCRECT pRect)
{
	if (m_bIsPressed)
		pDC->Draw3dRect(pRect, ::GetSysColor(COLOR_BTNSHADOW), ::GetSysColor(COLOR_BTNHILIGHT));
	else
		pDC->Draw3dRect(pRect, ::GetSysColor(COLOR_BTNHILIGHT), ::GetSysColor(COLOR_BTNSHADOW));

	return BTNST_OK;
} // End of OnDrawBorder

#undef BS_TYPEMASK