www.pudn.com > lhwy_odbc2.zip > LinkButton.cpp, change:2002-10-09,size:4899b


// LinkButton.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "lhwy.h" 
#include "LinkButton.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CLinkButton 
 
CLinkButton::CLinkButton() 
{ 
	bHighlight = bLBtnDown = false; 
	hHand = AfxGetApp()->LoadCursor(IDC_CURSOR1); 
} 
 
CLinkButton::~CLinkButton() 
{ 
	if (fUnderline.GetSafeHandle()) fUnderline.DeleteObject(); 
} 
 
 
BEGIN_MESSAGE_MAP(CLinkButton, CButton) 
	//{{AFX_MSG_MAP(CLinkButton) 
	ON_WM_MOUSEMOVE() 
	ON_WM_SETCURSOR() 
	ON_WM_TIMER() 
	ON_WM_CREATE() 
	ON_WM_LBUTTONUP() 
	ON_WM_LBUTTONDOWN() 
	ON_WM_ERASEBKGND() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CLinkButton message handlers 
 
void CLinkButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)  
{ 
	// 获取一个CDC指针 
	CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC); 
 
	//定义按钮区域并初始化 
	CRect rect(lpDrawItemStruct->rcItem); 
 
	//设置背景模式 
	COLORREF oc=RGB(30,123,255); 
		//oc = pDC->GetTextColor(); 
int iObk = pDC->SetBkMode(TRANSPARENT); 
 
	//初始化按钮状态 
	UINT state = lpDrawItemStruct->itemState; 
 
	CFont * pOldFont = NULL; 
 
	int iYOffset = 0, iXOffset = 0; 
 
	CString strText; 
	GetWindowText(strText); 
 
	rect.top  += iYOffset; 
	rect.left += iXOffset; 
 
 
	if (state & ODS_DISABLED) 
	{		 
		//按钮置灰(DISABLED) 
		CBrush grayBrush; 
		grayBrush.CreateSolidBrush (GetSysColor (COLOR_GRAYTEXT)); 
		CSize sz = pDC->GetTextExtent(strText); 
		int x = rect.left + (rect.Width() - sz.cx)/2; 
		int y = rect.top + (rect.Height() - sz.cy)/2; 
		rect.top  += 2; 
		rect.left += 2; 
		pDC->SetTextColor(GetSysColor(COLOR_3DHIGHLIGHT)); 
		pDC->DrawText(strText, rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE); 
		rect.top  -= 2; 
		rect.left -= 2; 
		pDC->SetTextColor(GetSysColor(COLOR_GRAYTEXT)); 
		pDC->DrawText(strText, rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE); 
	} 
	else 
	{ 
		if (bHighlight)//光标在按钮上 
		{ 
			if (state & ODS_SELECTED) 
			{ 
				//按下按钮 
				pDC->Draw3dRect(rect,RGB(0,0,255), RGB(0,0,255)); 
			} 
			else 
			{ 
				//未按下按钮 
				pDC->Draw3dRect(rect,RGB(255,0,0),RGB(255,0,0));			} 
			//字体颜色 
			pDC->SetTextColor(RGB(0,0,255)); 
 
			//加下画线(也可以用其他字体) 
			if (fUnderline.GetSafeHandle() == NULL) 
			{ 
				CFont * pFont = GetFont(); 
				ASSERT(pFont); 
				LOGFONT lf; 
				pFont->GetLogFont(&lf); 
				lf.lfUnderline = TRUE; 
				fUnderline.CreateFontIndirect(&lf);		 
			} 
 
			pOldFont = pDC->SelectObject(&fUnderline); 
		} 
		else  
		{ 
			pDC->SetTextColor(RGB(255,123,30)); 
			pDC->Draw3dRect(rect,RGB(255,0,0),RGB(255,0,0));	} 
 
		pDC->DrawText(strText, rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE); 
		if (pOldFont) pDC->SelectObject(pOldFont); 
	} 
} 
 
 
void CLinkButton::OnMouseMove(UINT nFlags, CPoint point)  
{ 
	//设置一个定时器 
	SetTimer(1,10,NULL); 
	 
	CButton::OnMouseMove(nFlags, point); 
} 
 
BOOL CLinkButton::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)  
{ 
	if (bHighlight)  
	{ 
		::SetCursor(hHand); 
		return true; 
	} 
	 
	return CButton::OnSetCursor(pWnd, nHitTest, message); 
} 
 
void CLinkButton::OnTimer(UINT nIDEvent)  
{ 
	static bool pPainted = false; 
	POINT pt; 
	GetCursorPos(&pt); 
	CRect rect; 
	GetWindowRect (rect); 
	if (bLBtnDown)	 
	{		 
		KillTimer (1); 
		if (pPainted) InvalidateRect (NULL);		 
		pPainted = FALSE;		 
		return;	 
	} 
 
	if (!rect.PtInRect (pt))	 
	{		 
		bHighlight = false; 
		KillTimer (1); 
 
		if (pPainted)			 
			InvalidateRect(NULL); 
 
		pPainted = false; 
		return;	 
	} 
	else 
	{ 
		bHighlight = true; 
		if (!pPainted) 
		{ 
			pPainted = true; 
			InvalidateRect(NULL); 
		} 
	} 
 
	CButton::OnTimer(nIDEvent); 
} 
 
int CLinkButton::OnCreate(LPCREATESTRUCT lpCreateStruct)  
{ 
	if (CButton::OnCreate(lpCreateStruct) == -1) 
		return -1; 
	 
	CFont * pFont = GetFont(); 
	ASSERT(pFont); 
 
	LOGFONT lf; 
	pFont->GetLogFont(&lf); 
	lf.lfUnderline = TRUE; 
 
	fUnderline.CreateFontIndirect(&lf); 
	 
	return 0; 
} 
 
void CLinkButton::OnLButtonUp(UINT nFlags, CPoint point)  
{ 
	bLBtnDown = false; 
	if (bHighlight)	 
	{ 
		bHighlight = false; 
		InvalidateRect(NULL); 
	} 
	 
	CButton::OnLButtonUp(nFlags, point); 
} 
 
void CLinkButton::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	bLBtnDown = true; 
	 
	CButton::OnLButtonDown(nFlags, point); 
} 
 
BOOL CLinkButton::OnEraseBkgnd(CDC* pDC)  
{ 
	COLORREF cr = GetSysColor(COLOR_3DFACE); 
	int r = GetRValue(cr); 
	int g = GetGValue(cr); 
	int b = GetBValue(cr); 
	if (r > 1) r -= 2; 
	if (g > 1) g -= 2; 
	if (r < 3 && g < 3 && b < 253) b += 2; 
	COLORREF cr1 = RGB(255,255,0); 
	CRect rc; 
	GetClientRect(rc); 
	pDC->FillSolidRect(rc, cr1); 
	 
	return CButton::OnEraseBkgnd(pDC); 
}