ctrlcooltip.cpp

著名的下载软件核心Shareaza

//
// CtrlCoolTip.cpp
//
// Copyright (c) Shareaza Development Team, 2002-2004.
// This file is part of SHAREAZA (www.shareaza.com)
//
// Shareaza is free software; you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Shareaza is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Shareaza; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#include "StdAfx.h"
#include "Shareaza.h"
#include "Settings.h"
#include "CoolInterface.h"
#include "CtrlCoolTip.h"
#include "GraphLine.h"

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

IMPLEMENT_DYNAMIC(CCoolTipCtrl, CWnd)

BEGIN_MESSAGE_MAP(CCoolTipCtrl, CWnd)
	//{{AFX_MSG_MAP(CCoolTipCtrl)
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	ON_WM_MOUSEMOVE()
	ON_WM_KEYDOWN()
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

LPCTSTR CCoolTipCtrl::m_hClass = NULL;

#define TIP_TIMER		100
#define TIP_OFFSET_X	0
#define TIP_OFFSET_Y	24
#define TIP_MARGIN		6
#define TIP_TEXTHEIGHT	14


/////////////////////////////////////////////////////////////////////////////
// CCoolTipCtrl construction

CCoolTipCtrl::CCoolTipCtrl()
{
	m_pbEnable	= NULL;
	m_pContext	= NULL;
	m_hAltWnd	= NULL;
	m_bTimer	= FALSE;
	m_bVisible	= FALSE;
	m_tOpen		= 0;
	
	if ( m_hUser32 = LoadLibrary( _T("User32.dll") ) )
	{
		(FARPROC&)m_pfnSetLayeredWindowAttributes = GetProcAddress(
			m_hUser32, "SetLayeredWindowAttributes" );
	}
	else
	{
		m_pfnSetLayeredWindowAttributes = NULL;
	}

	if ( m_hClass == NULL ) m_hClass = AfxRegisterWndClass( CS_SAVEBITS );
}

CCoolTipCtrl::~CCoolTipCtrl()
{
	if ( m_hWnd != NULL ) DestroyWindow();
	if ( m_hUser32 != NULL ) FreeLibrary( m_hUser32 );
}

/////////////////////////////////////////////////////////////////////////////
// CCoolTipCtrl operations

BOOL CCoolTipCtrl::Create(CWnd* pParentWnd, BOOL* pbEnable)
{
	CRect rc( 0, 0, 0, 0 );
	
	if ( ! CWnd::CreateEx( WS_EX_TOPMOST, m_hClass, NULL, WS_POPUP|WS_DISABLED,
		rc, pParentWnd, 0, NULL ) ) return FALSE;
	
	SetOwner( pParentWnd );
	m_pbEnable = pbEnable;
	
	return TRUE;
}

void CCoolTipCtrl::Show(LPVOID pContext, HWND hAltWnd)
{
	if ( pContext == NULL ) return;
	if ( AfxGetMainWnd() != GetForegroundWindow() ) return;
	if ( m_pbEnable != NULL && *m_pbEnable == 0 ) return;
	
	CPoint point;
	GetCursorPos( &point );
	
	m_hAltWnd = hAltWnd;
	
	if ( m_bVisible )
	{
		if ( pContext == m_pContext ) return;
		
		Hide();
		
		m_pContext = pContext;
		
		ShowImpl();
	}
	else if ( point != m_pOpen )
	{
		m_pContext	= pContext;
		m_pOpen		= point;
		m_tOpen		= GetTickCount() + Settings.Interface.TipDelay;
		
		if ( ! m_bTimer )
		{
			SetTimer( 1, TIP_TIMER, NULL );
			m_bTimer = TRUE;
		}
	}
}

void CCoolTipCtrl::Hide()
{
	m_pContext	= NULL;
	m_tOpen		= 0;
	
	if ( m_bVisible )
	{
		OnHide();
		
		ShowWindow( SW_HIDE );
		ModifyStyleEx( WS_EX_LAYERED, 0 );
		m_bVisible = FALSE;
		GetCursorPos( &m_pOpen );
	}
	
	if ( m_bTimer )
	{
		KillTimer( 1 );
		m_bTimer = FALSE;
	}
}

void CCoolTipCtrl::ShowImpl()
{
	if ( m_bVisible ) return;
	
	m_sz.cx = m_sz.cy = 0;
	
	if ( ! OnPrepare() ) return;
	
	CRect rc( m_pOpen.x + TIP_OFFSET_X, m_pOpen.y + TIP_OFFSET_Y, 0, 0 );
	rc.right = rc.left + m_sz.cx + TIP_MARGIN * 2;
	rc.bottom = rc.top + m_sz.cy + TIP_MARGIN * 2;
	
	if ( rc.right >= GetSystemMetrics( SM_CXSCREEN ) )
	{
		rc.OffsetRect( GetSystemMetrics( SM_CXSCREEN ) - rc.right - 4, 0 );
	}
	
	if ( rc.bottom >= GetSystemMetrics( SM_CYSCREEN ) )
	{
		rc.OffsetRect( 0, - ( m_sz.cy + TIP_MARGIN * 2 + TIP_OFFSET_Y + 4 ) );
	}
	
	m_bVisible = TRUE;
	
	OnShow();
	
	if ( Settings.Interface.TipAlpha == 255 || m_pfnSetLayeredWindowAttributes == NULL )
	{
		ModifyStyleEx( WS_EX_LAYERED, 0 );
	}
	else
	{
		ModifyStyleEx( 0, WS_EX_LAYERED );
		(*m_pfnSetLayeredWindowAttributes)( GetSafeHwnd(),
			0, (BYTE)Settings.Interface.TipAlpha, LWA_ALPHA );
	}
	
	SetWindowPos( &wndTopMost, rc.left, rc.top, rc.Width(), rc.Height(),
		SWP_SHOWWINDOW|SWP_NOACTIVATE );
	UpdateWindow();
	
	if ( ! m_bTimer )
	{
		SetTimer( 1, TIP_TIMER, NULL );
		m_bTimer = TRUE;
	}
}

void CCoolTipCtrl::CalcSizeHelper()
{
	CClientDC dc( this );
	
	m_sz.cx = m_sz.cy = 0;
	
	CFont* pOldFont = (CFont*)dc.SelectObject( &CoolInterface.m_fntBold );
	
	OnCalcSize( &dc );
	
	dc.SelectObject( pOldFont );
}

void CCoolTipCtrl::AddSize(CDC* pDC, LPCTSTR pszText, int nBase)
{
	CSize szText = pDC->GetTextExtent( pszText, _tcslen( pszText ) );
	szText.cx += nBase;
	m_sz.cx = max( m_sz.cx, szText.cx );
}

void CCoolTipCtrl::GetPaintRect(RECT* pRect)
{
	pRect->left = 0;
	pRect->top = 0;
	pRect->right = m_sz.cx;
	pRect->bottom = m_sz.cy;
}

void CCoolTipCtrl::DrawText(CDC* pDC, POINT* pPoint, LPCTSTR pszText, int nBase)
{
	CSize sz = pDC->GetTextExtent( pszText, _tcslen( pszText ) );

	if ( nBase ) pPoint->x += nBase;
	CRect rc( pPoint->x - 2, pPoint->y - 2, pPoint->x + sz.cx + 2, pPoint->y + sz.cy + 2 );

	pDC->SetBkColor( CoolInterface.m_crTipBack );
	pDC->ExtTextOut( pPoint->x, pPoint->y, ETO_CLIPPED|ETO_OPAQUE, &rc, pszText, _tcslen( pszText ), NULL );
	pDC->ExcludeClipRect( &rc );

	if ( nBase ) pPoint->x -= nBase;
}

void CCoolTipCtrl::DrawRule(CDC* pDC, POINT* pPoint, BOOL bPos)
{
	pPoint->y += 5;
	if ( bPos )
	{
		pDC->Draw3dRect( pPoint->x, pPoint->y,
			m_sz.cx + ( TIP_MARGIN - 3 ) - pPoint->x, 1, CoolInterface.m_crTipBorder,
			CoolInterface.m_crTipBorder );
		pDC->ExcludeClipRect( pPoint->x, pPoint->y,
			m_sz.cx + ( TIP_MARGIN - 3 ), pPoint->y + 1 );
	}
	else
	{
		pDC->Draw3dRect( -( TIP_MARGIN - 3 ), pPoint->y,
			m_sz.cx + ( TIP_MARGIN - 3 ) * 2, 1, CoolInterface.m_crTipBorder,
			CoolInterface.m_crTipBorder );
		pDC->ExcludeClipRect( -( TIP_MARGIN - 3 ), pPoint->y,
			m_sz.cx + ( TIP_MARGIN - 3 ), pPoint->y + 1 );
	}
	pPoint->y += 6;
}

BOOL CCoolTipCtrl::WindowFromPointBelongsToOwner(const CPoint& point)
{
	CRect rc;
	GetOwner()->GetWindowRect( &rc );
	
	if ( ! rc.PtInRect( point ) ) return FALSE;
	
	CWnd* pWnd = WindowFromPoint( point );
	
	while ( pWnd )
	{
		if ( pWnd == GetOwner() ) return TRUE;
		if ( m_hAltWnd != NULL && pWnd->GetSafeHwnd() == m_hAltWnd ) return TRUE;
		pWnd = pWnd->GetParent();
	}
	
	return FALSE;
}

CLineGraph* CCoolTipCtrl::CreateLineGraph()
{
	CLineGraph* pGraph = new CLineGraph();

	pGraph->m_bShowLegend	= FALSE;
	pGraph->m_bShowAxis		= FALSE;
	pGraph->m_nMinGridVert	= 16;
	
	pGraph->m_crBack = CoolInterface.CalculateColour(
		RGB( 255, 255, 255 ), CoolInterface.m_crTipBack, 80 );
	pGraph->m_crGrid = CoolInterface.CalculateColour(
		CoolInterface.m_crTipBorder, pGraph->m_crBack, 180 );

	return pGraph;
}

/////////////////////////////////////////////////////////////////////////////
// CCoolTipCtrl message handlers

int CCoolTipCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if ( CWnd::OnCreate( lpCreateStruct ) == -1 ) return -1;
	m_bTimer = FALSE;
	return 0;
}

void CCoolTipCtrl::OnDestroy() 
{
	if ( m_bTimer ) KillTimer( 1 );
	m_bTimer = FALSE;
	if ( m_bVisible ) Hide();
	CWnd::OnDestroy();
}

BOOL CCoolTipCtrl::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

void CCoolTipCtrl::OnPaint() 
{
	if ( ! IsWindow( GetSafeHwnd() ) || ! IsWindowVisible() ) return;
	
	CPaintDC dc( this );
	CRect rc;
	
	GetClientRect( &rc );
	
	CFont* pOldFont = (CFont*)dc.SelectObject( &CoolInterface.m_fntBold );

	dc.Draw3dRect( &rc, CoolInterface.m_crTipBorder, CoolInterface.m_crTipBorder );
	dc.SetViewportOrg( TIP_MARGIN, TIP_MARGIN );
	rc.DeflateRect( 1, 1 );
	
	OnPaint( &dc );

	dc.SetViewportOrg( 0, 0 );
	dc.FillSolidRect( &rc, CoolInterface.m_crTipBack );
	dc.SelectObject( pOldFont );
}

void CCoolTipCtrl::OnMouseMove(UINT nFlags, CPoint point) 
{
	Hide();
}

void CCoolTipCtrl::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	Hide();
	CWnd::OnKeyDown( nChar, nRepCnt, nFlags );
}

void CCoolTipCtrl::OnTimer(UINT nIDEvent) 
{
	CPoint point;
	GetCursorPos( &point );
	
	if ( WindowFromPointBelongsToOwner( point ) )
	{
		CWnd* pWnd = GetForegroundWindow();
		
		if ( pWnd != this && pWnd != AfxGetMainWnd() )
		{
			if ( m_bVisible ) Hide();
			return;
		}
	}
	else
	{
		if ( m_bVisible ) Hide();
		return;
	}
	
	if ( ! m_bVisible && m_tOpen && GetTickCount() >= m_tOpen )
	{
		m_tOpen = 0;
		if ( point == m_pOpen || m_hAltWnd != NULL ) ShowImpl();
	}
}

/////////////////////////////////////////////////////////////////////////////
// CCoolTipCtrl events

BOOL CCoolTipCtrl::OnPrepare()
{
	return FALSE;
}

void CCoolTipCtrl::OnCalcSize(CDC* pDC)
{
}

void CCoolTipCtrl::OnShow()
{
}

void CCoolTipCtrl::OnHide()
{
}

void CCoolTipCtrl::OnPaint(CDC* pDC)
{
}