transslider.cpp

实时监控

#include "stdafx.h"
#include "TransSlider.h"
#include "rect.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTransSlider

//##ModelId=3F90BAA70273
CTransSlider::CTransSlider(): p(0), from(0), to(100), t(1)
{
}

//##ModelId=3F90BAA702B0
CTransSlider::~CTransSlider()
{
}

BEGIN_MESSAGE_MAP(CTransSlider, CWnd)
	//{{AFX_MSG_MAP(CTransSlider)
	ON_WM_PAINT()
	ON_WM_ERASEBKGND()
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

//#include "memdc.h"
//#include "logfont.h"
//##ModelId=3F90BAA70269
void CTransSlider::paintbk()
{
	CRect rc;
	GetWindowRect(rc);
	CWnd* p = AfxGetMainWnd();
	if( !p )
		return;

	p->ScreenToClient(rc);
	p->RedrawWindow(rc);
}

//##ModelId=3F90BAA7029B
BOOL CTransSlider::SetTic(int tic)
{
	t = tic;
	return TRUE;
}

//##ModelId=3F90BAA702A5
void CTransSlider::SetTicFreq(int freq)
{
	tf = freq;
}

//##ModelId=3F90BAA70287
void CTransSlider::SetRange(int mn, int mx)
{
	from = mn;
	to = mx;
}

//##ModelId=3F90BAA70291
void CTransSlider::GetRange(int& mn, int& mx)
{
	mn = from;
	mx = to;
}

//##ModelId=3F90BAA7027E
int CTransSlider::GetPos() const
{
	return p;
}

//##ModelId=3F90BAA70274
void CTransSlider::SetPos(int pos)
{
	if( pos < from )
		pos = from;
	if( pos > to )
		pos = to;

	p = pos;
	if( IsWindow(m_hWnd) &&
		IsWindowVisible() )
	{
		paintbk();

		RedrawWindow();
	}
}

//##ModelId=3F90BAA702B2
void CTransSlider::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	int range = to - from;
	if( range <= 0 )
	{
		range = 100;
		p = 0;
	}

	CRect rc;
	GetClientRect(rc);

	const int h = 8;
	CRect rc_channel(rc);
	rc_channel.top = (rc.Height()-h)/2;
	rc_channel.bottom = rc_channel.top + h;

	dc.Draw3dRect(rc_channel, 
		::GetSysColor(COLOR_BTNSHADOW),
		::GetSysColor(COLOR_BTNFACE));

	CRect rc_bar(rc_channel);
	rc_bar.DeflateRect(1,1,1,1);
	dc.FillRect(rc_bar, &CBrush(RGB(255,255,255)));

	const int thumb_w = 10;
	const int thumb_h = 20;

	int w = rc.Width() - thumb_w;

	CRect rc_thumb;
	rc_thumb.top = (rc.Height()-thumb_h)/2;
	rc_thumb.bottom = rc_thumb.top + thumb_h;
	rc_thumb.left = rc.left + (p-from)*w/(range);
	rc_thumb.right = rc_thumb.left + thumb_w;

	dc.FrameRect(rc_thumb, &CBrush(RGB(0,0,0)));
	rc_thumb.DeflateRect(1,1,1,1);
	dc.FrameRect(rc_thumb, &CBrush(RGB(255,255,255)));
	rc_thumb.DeflateRect(1,1,1,1);
	dc.FillRect(rc_thumb, &CBrush(::GetSysColor(COLOR_BTNFACE)));
	
	// 画tics
	for( int i=0; i<t; i++ )
	{
		int ticx = rc.left + i*rc.Width()/(t-1);
		if( ticx >= rc.right )
			ticx = rc.right-1;

		const int tic_h = 4;
		dc.MoveTo(ticx, rc.bottom-tic_h);
		dc.LineTo(ticx, rc.bottom);
	}
}

//##ModelId=3F90BAA702BA
BOOL CTransSlider::OnEraseBkgnd(CDC* pDC) 
{
	return FALSE;
}

int x(double y)
{
	int yy = (int)(y*10);
	if( yy %10 >= 5 )
		return (int)y + 1;
	else
		return (int)y;
}

//##ModelId=3F90BAA702C5
void CTransSlider::OnLButtonDown(UINT nFlags, CPoint point) 
{
	CRect rc;
	GetClientRect(rc);
	if( !rc.Width() )
		return;

	//p = point.x/(rc.Width());
	double percent = (double)point.x/(rc.Width());
	percent *= to-from;
	percent += from;
	if( p != x(percent) )
		SetPos(x(percent));

	SetCapture();
//	CWnd::OnLButtonDown(nFlags, point);
}

//##ModelId=3F90BAA702D8
void CTransSlider::OnMouseMove(UINT nFlags, CPoint point) 
{
	if( nFlags == MK_LBUTTON )
	{
		OnLButtonDown(nFlags, point);
		return;
	}
	CWnd::OnMouseMove(nFlags, point);
}

//##ModelId=3F90BAA702E3
void CTransSlider::OnLButtonUp(UINT nFlags, CPoint point) 
{
	//CWnd::OnLButtonUp(nFlags, point);
	ReleaseCapture();
}