www.pudn.com > ThumbViewer.rar > PreviewBar.cpp

// PreviewBar.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "ThumbViewer.h" 
#include "PreviewBar.h" 
 
#include "MainFrm.h" 
#include "ThumbViewerDoc.h" 
 
#include "memdc.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CPreviewBar 
 
CPreviewBar::CPreviewBar() 
{ 
} 
 
CPreviewBar::~CPreviewBar() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CPreviewBar, CSizingControlBarG) 
	//{{AFX_MSG_MAP(CPreviewBar) 
	ON_WM_CREATE() 
	ON_WM_DRAWITEM() 
	ON_WM_SIZE() 
	ON_WM_LBUTTONUP() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CPreviewBar message handlers 
 
int CPreviewBar::OnCreate(LPCREATESTRUCT lpCreateStruct)  
{ 
	if (CSizingControlBarG::OnCreate(lpCreateStruct) == -1) 
		return -1; 
	 
	// TODO: Add your specialized creation code here 
	CRect	rect; 
	GetClientRect( &rect ); 
 
	m_wndCanvas.Create(_T("Image Preview Canvas"), WS_VISIBLE|WS_CHILD|SS_OWNERDRAW , rect, this, IDC_IMAGEPREVIEW); 
	return 0; 
} 
 
void CPreviewBar::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)  
{ 
	// TODO: Add your message handler code here and/or call default 
	// Àüü¸¦ ±×·Á¾ß ÇÒ°æ¿ì 
	if(lpDrawItemStruct->itemAction & ODA_DRAWENTIRE ) 
	{ 
		CRect rect; 
		GetClientRect(rect); 
		HBRUSH hBrush=::CreateSolidBrush(RGB(255, 255, 255)); 
		::FillRect(lpDrawItemStruct->hDC, rect, hBrush); 
		DeleteObject(hBrush); 
 
		CMainFrame* pFrame=(CMainFrame*)AfxGetMainWnd(); 
		CThumbViewerDoc* pDoc=(CThumbViewerDoc*)pFrame->GetActiveDocument(); 
 
		if(pDoc->m_pSelectedImage!=NULL) 
		{ 
			// Draw Image 
			pDoc->m_pSelectedImage->Draw(lpDrawItemStruct->hDC, lpDrawItemStruct->rcItem); 
		} 
	} 
//	CSizingControlBarG::OnDrawItem(nIDCtl, lpDrawItemStruct); 
} 
 
void CPreviewBar::OnSize(UINT nType, int cx, int cy)  
{ 
	CSizingControlBarG::OnSize(nType, cx, cy); 
	 
	// TODO: Add your message handler code here 
	CRect rc; 
    GetClientRect(rc); 
 
	CMainFrame* pFrame=(CMainFrame*)AfxGetMainWnd(); 
	if(pFrame==NULL) 
		return; 
 
	CThumbViewerDoc* pDoc=(CThumbViewerDoc*)pFrame->GetActiveDocument(); 
 
	if(pDoc->m_pSelectedImage==NULL) 
	{ 
		rc.SetRectEmpty(); 
		m_wndCanvas.MoveWindow(rc); 
	} 
	else 
	{ 
		const int nWidth=rc.Width(); 
		const int nHeight=rc.Height(); 
		const float fRatio=(float)nHeight/nWidth; 
		const float fImgRatio=(float)pDoc->m_pSelectedImage->GetHeight()/pDoc->m_pSelectedImage->GetWidth(); 
 
		int XDest, YDest, nDestWidth, nDestHeight; 
		if(fImgRatio > fRatio) 
		{ 
			nDestWidth=nHeight/fImgRatio; 
			XDest=(nWidth-nDestWidth)/2; 
			YDest=0; 
			nDestHeight=nHeight; 
		} 
		else 
		{ 
			XDest=0; 
			nDestWidth=nWidth; 
			nDestHeight=nWidth*fImgRatio; 
			YDest=(nHeight-nDestHeight)/2; 
		} 
		CRect rect(XDest, YDest, XDest+nDestWidth, YDest+nDestHeight); 
		m_wndCanvas.MoveWindow(rect); 
		m_wndCanvas.Invalidate(); 
	} 
} 
 
// Not closing window, just hiding 
void CPreviewBar::OnLButtonUp(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	if( OnNcHitTest(point) == HTCLOSE ) 
	{ 
		CMainFrame* pFrame=(CMainFrame*)AfxGetMainWnd(); 
		pFrame->SendMessage(WM_COMMAND, ID_VIEW_DIRECTORY_BAR); 
	} 
	CSizingControlBarG::OnLButtonUp(nFlags, point); 
}