gps/GPSProject/ImageView/ThumbIcon.cpp

// ThumbIcon.cpp : implementation file
//

#include "stdafx.h"
#include "ImageViewer.h"
#include "ThumbIcon.h"

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

/////////////////////////////////////////////////////////////////////////////
// CThumbIcon

CThumbIcon::CThumbIcon()
{
	m_txtFont.CreateFont(12,0,0,0,FW_BOLD,0,0,0,GB2312_CHARSET,OUT_DEFAULT_PRECIS,
		CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH|FF_SWISS,_T("Arial"));
	
	m_NormalID = 0;
	m_DownID = 0;
	m_ImageID = 0;
	m_InitDC = false;
	m_IsSelected = false;
	m_Title.Empty();
	m_ShowIcon = FALSE;
	m_BmpSize = CSize(0,0);
	m_txtColor = RGB(255,255,255);
	m_IsDown = FALSE;
}

CThumbIcon::~CThumbIcon()
{
	m_NormalDC.DeleteDC();
	m_DownDC.DeleteDC();
	m_BackgroundDC.DeleteDC();
	
	m_txtFont.DeleteObject();
	m_MemDC.DeleteDC();	
}


BEGIN_MESSAGE_MAP(CThumbIcon, CButton)
	//{{AFX_MSG_MAP(CThumbIcon)
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	ON_WM_LBUTTONDOWN()
	ON_WM_KILLFOCUS()
	ON_WM_LBUTTONDBLCLK()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CThumbIcon message handlers

void CThumbIcon::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{

}

void CThumbIcon::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	// 在此设置按钮样式为自绘按钮
	ModifyStyle(0, GetStyle()|BS_OWNERDRAW);
	
	CButton::PreSubclassWindow();
}

BOOL CThumbIcon::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	if (!m_InitDC && m_ImageID)
	{
		// 建立临时对象从资源中加载图片
		CDC tmpDC;
		tmpDC.CreateCompatibleDC(NULL);
		
		CBitmap tmpBmp;
		tmpBmp.LoadBitmap(m_ImageID);
		tmpDC.SelectObject(&tmpBmp);
		
		tmpBmp.DeleteObject();
		
		// 计算按钮在窗口内的位置
		CRect rect;
		GetClientRect(&rect);
		
		// 获取按钮的宽和高
		int cx = rect.Width();
		int cy = rect.Height();
		
		// 主/子窗体矩形区域
		CRect mainWnd;
		CRect subWnd;
		
		// 获取父窗体矩形
		CWnd *pWnd = GetParent();
		pWnd->GetWindowRect(&mainWnd);
		
		// 获取按钮矩形
		GetWindowRect(&subWnd);
		
		// 计算相对位置
		CPoint tpLeft;
		tpLeft.x = subWnd.TopLeft().x - mainWnd.TopLeft().x;
		tpLeft.y = subWnd.TopLeft().y - mainWnd.TopLeft().y;
		
		// 复制图片到内存中
		tmpBmp.CreateCompatibleBitmap(&tmpDC,cx,cy);
		
		m_BackgroundDC.CreateCompatibleDC(NULL);
		m_BackgroundDC.SelectObject(&tmpBmp);
		
		m_BackgroundDC.BitBlt(0,0,cx,cy,&tmpDC,tpLeft.x,tpLeft.y,SRCCOPY);
		
		// 清理资源
		tmpBmp.DeleteObject();
		tmpDC.DeleteDC();
		
		tmpBmp.CreateCompatibleBitmap(pDC,cx,cy);
		m_MemDC.CreateCompatibleDC(pDC);
		m_MemDC.SelectObject(&tmpBmp);
		m_MemDC.SelectObject(&m_txtFont);
		m_MemDC.SetBkMode(TRANSPARENT);			
		tmpBmp.DeleteObject();
		m_InitDC = true;
	}
	return FALSE;
	//return CButton::OnEraseBkgnd(pDC);
}

void CThumbIcon::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	CRect rc;
	GetClientRect(&rc);
	
	
	if(m_ShowIcon)
	{
		if (m_NormalID && m_DownID)
		{
			if (!m_IsSelected)
			{
				m_MemDC.SetTextColor(RGB(255,255,255));
				m_MemDC.BitBlt(0,0,rc.Width(),rc.Height(),&m_NormalDC,0,0,SRCCOPY);				
			} 
			else
			{
				m_MemDC.SetTextColor(RGB(10,0,0));
				m_MemDC.BitBlt(0,0,rc.Width(),rc.Height(),&m_DownDC,0,0,SRCCOPY);	
			}
			
			m_MemDC.DrawText(m_Title,&rc,DT_BOTTOM|DT_LEFT);	
			
			CDC tmpDC;
			CBitmap tmpBmp;
			
			tmpBmp.CreateCompatibleBitmap(&dc,rc.Width(),rc.Height());
			tmpDC.CreateCompatibleDC(&dc);
			
			tmpDC.SelectObject(&tmpBmp);
			tmpDC.BitBlt(0,0,rc.Width(),rc.Height(),&m_BackgroundDC,0,0,SRCCOPY);
			
			TransparentImage(tmpDC.m_hDC,0,0,rc.Width(),rc.Height(),
				m_MemDC.m_hDC,0,0,m_BmpSize.cx,m_BmpSize.cy,m_BgColor);			
			
			dc.BitBlt(0,0,rc.Width(),rc.Height(),&tmpDC,0,0,SRCCOPY);
			
			
			tmpDC.DeleteDC();
			tmpBmp.DeleteObject();
			
		}	
	}
	else
	{
		dc.BitBlt(0,0,rc.Width(),rc.Height(),&m_BackgroundDC,0,0,SRCCOPY);
	}	
	// Do not call CButton::OnPaint() for painting messages
}

void CThumbIcon::LoadIcon(int nNormalID, int nDownID, int nImageID, COLORREF BgColor)
{
	m_NormalID = nNormalID;
	m_DownID = nDownID;
	m_ImageID = nImageID;
	m_BgColor = BgColor;
	// 初始化背景画刷
	CBitmap tmpBmp;
	BITMAP	bmpInfo;
	// 从资源中加载背景图片
	tmpBmp.LoadBitmap(m_NormalID);
	tmpBmp.GetBitmap(&bmpInfo);
	
	m_BmpSize = CSize(bmpInfo.bmWidth,bmpInfo.bmHeight);
	m_NormalDC.DeleteDC();
	m_DownDC.DeleteDC();
	m_NormalDC.CreateCompatibleDC(NULL);
	m_NormalDC.SelectObject(&tmpBmp);
	
	tmpBmp.DeleteObject();
	
	tmpBmp.LoadBitmap(m_DownID);
	m_DownDC.CreateCompatibleDC(NULL);
	m_DownDC.SelectObject(&tmpBmp);
	
	tmpBmp.DeleteObject();	
}

void CThumbIcon::ShowIcon(bool bShow)
{
	m_ShowIcon = bShow;
}

CString CThumbIcon::GetButtonTitle()
{
	return m_Title;
}

void CThumbIcon::SetButtonTitle(CString sTitle)
{
	m_Title = sTitle;
}

void CThumbIcon::SetChecked(bool bCheck)
{
	m_IsSelected = bCheck;
	Invalidate();
}

bool CThumbIcon::GetChecked()
{
	return m_IsDown;
}

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

	if (m_IsSelected)
	{
		m_IsDown = true;
	} 
	else
	{
		m_IsDown = false;
	}
	
	Invalidate();
	CButton::OnLButtonDown(nFlags, point);
}

void CThumbIcon::OnKillFocus(CWnd* pNewWnd) 
{
	CButton::OnKillFocus(pNewWnd);
	
	// TODO: Add your message handler code here
	m_IsSelected = FALSE;
}

void CThumbIcon::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CWnd* pWnd = GetParent();

	COPYDATASTRUCT cpd;
	cpd.dwData = 0;
	cpd.cbData = sizeof(m_Title);
	cpd.lpData = (void*)&m_Title;
	
	pWnd->SendMessage(WM_COPYDATA,NULL,(LPARAM)&cpd);	
	CButton::OnLButtonDblClk(nFlags, point);
}