hyperlinkbutton.cpp

本人设计的一个漂亮科学计算器

// HyperLinkButton.cpp : implementation file
//

#include "stdafx.h"
#include "test1.h"
#include "HyperLinkButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CHyperLinkButton

CHyperLinkButton::CHyperLinkButton()
{
	m_bMouseOver = m_bLBtnDown = FALSE;
	m_hCurHand = AfxGetApp()->LoadCursor(IDC_HANDCUR);

	m_bHighlight=TRUE;

}

CHyperLinkButton::~CHyperLinkButton()
{
}


BEGIN_MESSAGE_MAP(CHyperLinkButton, CButton)
	//{{AFX_MSG_MAP(CHyperLinkButton)
	ON_WM_CREATE()
	ON_WM_ERASEBKGND()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_WM_TIMER()
	ON_WM_SETCURSOR()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CHyperLinkButton message handlers

int CHyperLinkButton::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CButton::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	CFont *pFont = GetFont();
	ASSERT(pFont);

	LOGFONT lf;
	pFont->GetLogFont(&lf);
	lf.lfUnderline = TRUE;
	m_fontUnderline.CreateFontIndirect(&lf);

	return 0;
}



void CHyperLinkButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your code to draw the specified item
	CDC * pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
	CRect rect(lpDrawItemStruct->rcItem);

	pDC->SetBkMode(TRANSPARENT);

	UINT nBtnState = lpDrawItemStruct->itemState;

	CFont *pOldFont = NULL;
	CString strText;
	GetWindowText(strText);

	if(nBtnState & ODS_DISABLED)
	{
		CBrush brush;
		brush.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(m_bMouseOver)
		{
			if(nBtnState & ODS_SELECTED)
			{
				pDC->Draw3dRect(rect,GetSysColor(COLOR_3DSHADOW),GetSysColor(COLOR_3DHILIGHT));
			}
			else
			{
				pDC->Draw3dRect(rect,GetSysColor(COLOR_3DHILIGHT),GetSysColor(COLOR_3DSHADOW));
			}
			pDC->SetTextColor(RGB(0,0,255));

			if(m_fontUnderline.GetSafeHandle()==NULL)
			{
				CFont *pFont = GetFont();
				ASSERT(pFont);
				LOGFONT lf;
				pFont->GetLogFont(&lf);
				lf.lfUnderline = TRUE;
				m_fontUnderline.CreateFontIndirect(&lf);
			}

			pOldFont = pDC->SelectObject(&m_fontUnderline);
		}
		else
			pDC->SetTextColor(GetSysColor(COLOR_BTNTEXT));

		pDC->DrawText(strText,rect,DT_CENTER | DT_VCENTER | DT_SINGLELINE);
		if(pOldFont)
			pDC->SelectObject(pOldFont);
	}
}

BOOL CHyperLinkButton::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	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(r,g,b);
	CRect rc;
	GetClientRect(rc);

	pDC->FillSolidRect(rc,cr1);

	return CButton::OnEraseBkgnd(pDC);
}

void CHyperLinkButton::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_bLBtnDown = TRUE;

	CButton::OnLButtonDown(nFlags, point);
}

void CHyperLinkButton::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_bLBtnDown = FALSE;
	if(m_bHighlight)
	{
		m_bHighlight = FALSE;
		InvalidateRect(NULL);
	}

	CButton::OnLButtonUp(nFlags, point);
}

void CHyperLinkButton::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	SetTimer(1,10,NULL);

	CButton::OnMouseMove(nFlags, point);
}

void CHyperLinkButton::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	static BOOL bPainted = FALSE;
	POINT pt;
	GetCursorPos(&pt);
	CRect rect;
	
	GetWindowRect(rect);

	if(m_bLBtnDown)
	{
		KillTimer(1);
		if(bPainted)
			InvalidateRect(NULL);
		bPainted = FALSE;
		return;
	}

	if(!rect.PtInRect(pt))
	{
		m_bMouseOver = FALSE;
		KillTimer(1);

		if(bPainted)
			InvalidateRect(NULL);

		bPainted = FALSE;
		return;
	}
	else
	{
		m_bMouseOver = TRUE;
		InvalidateRect(NULL);
	}

	CButton::OnTimer(nIDEvent);
}

BOOL CHyperLinkButton::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	// TODO: Add your message handler code here and/or call default
	if(m_bMouseOver)
	{
		::SetCursor(m_hCurHand);
		return true;
	}

	return CButton::OnSetCursor(pWnd, nHitTest, message);
}