enstatic.cpp

来自「管理项目进度工具的原代码」· C++ 代码 · 共 162 行

// enstatic.cpp : implementation file
//

#include "stdafx.h"
#include "enstatic.h"
#include "themed.h"

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

/////////////////////////////////////////////////////////////////////////////
// CEnStatic

const int GRIPPERSIZE = 16;

CEnStatic::CEnStatic(BOOL bEnableGripper) : m_bGripper(bEnableGripper ? 1 : 0)
{
}

CEnStatic::~CEnStatic()
{
}


BEGIN_MESSAGE_MAP(CEnStatic, CStatic)
	//{{AFX_MSG_MAP(CEnStatic)
	ON_WM_PAINT()
	ON_WM_SIZE()
	ON_WM_NCHITTEST()
	ON_WM_ERASEBKGND()
	ON_WM_WINDOWPOSCHANGING()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEnStatic message handlers

void CEnStatic::EnableGripper(BOOL bEnable)
{
	bEnable = bEnable ? 1 : 0;

	if (GetSafeHwnd() && m_bGripper != bEnable)
		Invalidate();

	m_bGripper = bEnable;
}

void CEnStatic::OnPaint() 
{
	if (IsShowingGripper())
	{
		CPaintDC dc(this); // device context for painting

		// default first
		DefWindowProc(WM_PAINT, (WPARAM)(HDC)dc, 0);
		
		// then the gripper
		CThemed::DrawFrameControl(this, &dc, GetGripperRect(), DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
		
		return;
	}
	else // all else
		Default();
}

BOOL CEnStatic::IsShowingGripper()
{
	if (m_bGripper)
	{
		int nType = (GetStyle() & SS_TYPEMASK);

		switch (nType)
		{
		case SS_LEFT:          
		case SS_CENTER:
		case SS_RIGHT:
		case SS_SIMPLE:
		case SS_LEFTNOWORDWRAP:
			return TRUE;
		}
	}

	return FALSE;
}

void CEnStatic::OnSize(UINT nType, int cx, int cy) 
{
	if (IsShowingGripper())
		Invalidate();
	
	CStatic::OnSize(nType, cx, cy);
}

#if _MSC_VER >= 1400
LRESULT CEnStatic::OnNcHitTest(CPoint point)
#else
UINT CEnStatic::OnNcHitTest(CPoint point)
#endif
{
	if (IsShowingGripper())
	{
		CRect rClient;
		GetClientRect(rClient);

		rClient.left = rClient.right - GRIPPERSIZE;
		rClient.top = rClient.bottom - GRIPPERSIZE;

		ClientToScreen(rClient);

		if (rClient.PtInRect(point))
			return HTBOTTOMRIGHT;
	}
	
	return CStatic::OnNcHitTest(point);
}

BOOL CEnStatic::OnEraseBkgnd(CDC* pDC) 
{
	// if our parent has 'WS_CLIPCHILDREN' then we must draw ourselves
/*	if (GetParent()->GetStyle() & WS_CLIPCHILDREN)
	{
		CRect rClient;
		GetClientRect(rClient);
		pDC->FillSolidRect(rClient, GetSysColor(COLOR_3DFACE));
	}
*/
	CStatic::OnEraseBkgnd(pDC);

	// draw gripper here too
	if (IsShowingGripper())
		pDC->DrawFrameControl(GetGripperRect(), DFC_SCROLL, DFCS_SCROLLSIZEGRIP);

	return TRUE;
}

CRect CEnStatic::GetGripperRect()
{
	if (IsShowingGripper())
	{
		CRect rClient;
		GetClientRect(rClient);

		rClient.left = rClient.right - GRIPPERSIZE;
		rClient.top = rClient.bottom - GRIPPERSIZE;

		return rClient;
	}
	else
		return CRect(0, 0, 0, 0);
}

void CEnStatic::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos) 
{
	CStatic::OnWindowPosChanging(lpwndpos);
	
	InvalidateRect(GetGripperRect(), FALSE);
}