// InnerButton.cpp : implementation file
//

#include "stdafx.h"
#include "resource.h"
#include "InnerButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#pragma comment( lib, "Msimg32.lib" )
/////////////////////////////////////////////////////////////////////////////


/*                  CInnerButton
用来显示一张图片
能够感应鼠标的经过
从CButton派生的一个自画按钮
*/

CInnerButton::CInnerButton()
{
	m_bOver=FALSE;
	m_bTracking=FALSE;
	m_pGif = NULL;
}

CInnerButton::~CInnerButton()
{

}


BEGIN_MESSAGE_MAP(CInnerButton, CButton)
	//{{AFX_MSG_MAP(CInnerButton)
	ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
	ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
	ON_WM_MOUSEMOVE()
	ON_WM_ERASEBKGND()
	//}}AFX_MSG_MAP
	ON_WM_TIMER()
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CInnerButton message handlers

void CInnerButton::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	this->ModifyStyle(0,BS_OWNERDRAW);

	CButton::PreSubclassWindow();
}

void CInnerButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	//从lpDrawItemStruct获取控件的相关信息
	CRect rect =  lpDrawItemStruct->rcItem;
	CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
	int nSaveDC=pDC->SaveDC();
	UINT state = lpDrawItemStruct->itemState;
	TCHAR szText[MAX_PATH + 1];
	::GetWindowText(m_hWnd, szText, MAX_PATH);	
	/////
	///准备工作
	CPen *pOldPen,BorderPen,NullPen;
	HBRUSH pOldBrush;
	CBrush BGBrush;
	NullPen.CreatePen(PS_NULL,0,RGB(241,238,231));
	BGBrush.CreateSolidBrush(RGB(241,238,231));
	BorderPen.CreatePen(PS_SOLID,1,RGB(79,107,160));
	
	///如果鼠标经过的话,画一个边框
	if(m_bOver)
	{
		pOldPen=pDC->SelectObject(&NullPen);
		pDC->SelectObject(&BGBrush);
		pDC->Rectangle(&rect);
		pDC->SelectObject(pOldPen);

	}
	
	Graphics g(lpDrawItemStruct->hDC);
	g.DrawImage(m_pGif->GetImg(), rect.left, rect.top, rect.Width(), rect.Height());

	//鼠标经过状态
	if(m_bOver)
	{
		////////////
		pOldPen=pDC->SelectObject(&BorderPen);
		pOldBrush=HBRUSH(pDC->SelectObject(HBRUSH(::GetStockObject(NULL_BRUSH))));

		pDC->Rectangle(&rect);

		pDC->SelectObject(pOldPen);
		pDC->SelectObject(pOldBrush);

	}
	///输出文本
	if (szText!=NULL)
	{
		TEXTMETRIC tm;
		pDC->GetTextMetrics(&tm);
		CFont* hFont = GetFont();
		CFont* hOldFont = pDC->SelectObject(hFont);
		CSize sizeExtent = pDC->GetTextExtent(szText, lstrlen(szText));
		CPoint pt;
		pt.x=(rect.right-tm.tmAveCharWidth*lstrlen(szText))/2-2;
		pt.y=rect.bottom-tm.tmHeight-2;
		
		int nMode = pDC->SetBkMode(TRANSPARENT);
		pDC->SetTextColor(RGB(60,77,129));
		if (state & ODS_DISABLED)
			pDC->DrawState(pt, sizeExtent, szText, DSS_DISABLED, TRUE, 0, (HBRUSH)NULL);
		else
			pDC->DrawState(pt, sizeExtent, szText, DSS_NORMAL, TRUE, 0, (HBRUSH)NULL);
		pDC->SelectObject(hOldFont);
		pDC->SetBkMode(nMode);
	}
}

///跟踪鼠标,使用了TrackMouseEvent()函数
void CInnerButton::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(!m_bTracking)
	{
		TRACKMOUSEEVENT tme;
		tme.cbSize = sizeof(tme);
		tme.hwndTrack = m_hWnd;
		tme.dwFlags = TME_LEAVE | TME_HOVER;
		tme.dwHoverTime = 1;
		_TrackMouseEvent(&tme);
		m_bTracking=TRUE;
	}
	CButton::OnMouseMove(nFlags, point);
}
LRESULT CInnerButton::OnMouseHover(WPARAM wParam,LPARAM lParam)
{
	m_bOver=TRUE;
	this->Invalidate();
	return 0;
}

LRESULT CInnerButton::OnMouseLeave(WPARAM wParam,LPARAM lParam)
{
	m_bOver=FALSE;
	m_bTracking=FALSE;
	this->Invalidate();
	return 0;
}

////画背景色
BOOL CInnerButton::OnEraseBkgnd(CDC* pDC) 
{
	RECT rect;
	this->GetClientRect(&rect);
	CPen BorderPen;
	BorderPen.CreatePen(PS_SOLID,1,RGB(255,255,255));
	pDC->SelectObject(&BorderPen);
	pDC->SelectObject(HBRUSH(::GetStockObject(WHITE_BRUSH)));
	pDC->Rectangle(&rect);
	
	return TRUE;
}

void CInnerButton::SetGif(CGif* pGif)
{
	m_pGif = pGif;
}

void CInnerButton::PlayGif()
{
	m_pGif->SelectFrame(0);
	SetTimer(1, m_pGif->GetFrameTime() * 10, NULL);
	Invalidate(FALSE);
}
void CInnerButton::OnTimer(UINT_PTR nIDEvent)
{
	KillTimer(nIDEvent);
	if (m_pGif->IsLastFrame())
	{
		m_pGif->SelectFrame(0);
		SetTimer(1, 1000, NULL);
	}
	else
	{
		m_pGif->NextFrame();
		SetTimer(1, m_pGif->GetFrameTime() * 10, NULL);
	}

	Invalidate(FALSE);
}