[GME-commit] GMESRC/GME/Gme PannButton.cpp,NONE,1.1

[gme-commit at list.isis.vanderbilt.edu]

Update of /var/lib/gme/GMESRC/GME/Gme
In directory braindrain:/tmp/cvs-serv11228

Added Files:
	PannButton.cpp 
Log Message:
Panning Window embedded

CVS User: bogyom

--- NEW FILE: PannButton.cpp ---
// PannButton.cpp : implementation file
//

#include "stdafx.h"
#include "gme.h"
#include "PannButton.h"

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

/////////////////////////////////////////////////////////////////////////////
// CPannButton

CPannButton::CPannButton()
{
	m_viewRect = CRect(0,0,0,0);
	m_bitmapDC = NULL;
	m_bitmapS = CRect(0,0,0,0);
	m_bitmapO = CRect(0,0,0,0);
}

CPannButton::~CPannButton()
{
	if (m_bitmapDC)
		delete m_bitmapDC;
}


BEGIN_MESSAGE_MAP(CPannButton, CButton)
	//{{AFX_MSG_MAP(CPannButton)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPannButton message handlers


void CPannButton::SetBitmapDC(CDC *bdc, CRect &orisize, CRect &actsize) // may be empty
{
	if (m_bitmapDC)
		delete m_bitmapDC;
	m_bitmapDC = bdc; 
	m_bitmapO = orisize;
	m_bitmapS = actsize;
	Invalidate();
	UpdateWindow();
}

void CPannButton::SetViewRect(CRect &vrect)
{
	// vrect is on the logical coordinate system
	double rx = (double)(m_bitmapS.Width())/ m_bitmapO.Width();
	double ry = (double)(m_bitmapS.Height())/ m_bitmapO.Height();
	m_viewRect.left = (int)(vrect.left * rx);
	m_viewRect.right = (int)(vrect.right * rx);
	m_viewRect.top = (int)(vrect.top * ry);
	m_viewRect.bottom = (int)(vrect.bottom * ry);
	Invalidate();
	UpdateWindow();
}

void CPannButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
	if (!m_bitmapDC)
	{
		return;
	}
	if (lpDrawItemStruct->itemAction == ODA_DRAWENTIRE)
	{
		CDC dc;
		dc.Attach(lpDrawItemStruct->hDC); // device context for painting
		CRect vrect;
		GetParent()->GetClientRect(&vrect);

		m_bitmapDC->SetMapMode(MM_TEXT);
		dc.SetMapMode(MM_TEXT);
		double dx = (double)(vrect.Width())/m_bitmapS.Width();
		double dy = (double)(vrect.Height())/m_bitmapS.Height();
		double dd = (dx <= dy)? dx: dy;
		dd = (dd < 1)? dd: 1; 

		vrect.right = min(vrect.right, dd * m_bitmapS.Width());
		vrect.bottom = min(vrect.bottom, dd * m_bitmapS.Height());
		BOOL ret = dc.StretchBlt(0, 0, vrect.Width(), vrect.Height(), m_bitmapDC, 
								 0, 0, m_bitmapS.Width(), m_bitmapS.Height(), SRCCOPY);
		if (!m_viewRect.IsRectEmpty())
		{
			double rx = (double)(vrect.Width())/ m_bitmapS.Width();
			double ry = (double)(vrect.Height())/ m_bitmapS.Height();
			CRect vRect(0,0,0,0);
			vRect.left = m_viewRect.left * rx;
			vRect.right = m_viewRect.right * rx;
			vRect.top = m_viewRect.top * ry;
			vRect.bottom = m_viewRect.bottom * ry;
			vRect.right = min(vRect.right, vrect.right);
			vRect.bottom = min(vRect.bottom, vrect.bottom);
			CBrush brush;
			DWORD dw = GetSysColor(COLOR_WINDOWTEXT);
			BYTE r = GetRValue(dw);
			BYTE g = GetGValue(dw); 
			BYTE b = GetBValue(dw); 
			brush.CreateSolidBrush(RGB(r,g,b));
			dc.FrameRect(&vRect, &brush);
		}
		dc.Detach(); 
	}
}