advcombobox.cpp

EVC的Grid ctrl应用,有需要的朋友可以联系我哦

		if( pMsg->wParam == VK_RETURN )
		{
//			OutputDebugString( "(RETURN)\n" );
			if( m_pDropWnd )
			{
				int nPos = m_pDropWnd->GetListBoxPtr()->GetCurSel();
				SendMessage( WM_SELECTED_ITEM, (WPARAM)nPos );
			}
			else
			{
				return CWnd::PreTranslateMessage(pMsg);
			}
		}
		else
		if( pMsg->wParam == VK_ESCAPE )
		{
//			OutputDebugString( "(ESCAPE)\n" );
			if( m_pDropWnd )
			{
				OnDestroyDropdownList(0,0);
				Invalidate();
			}else return CWnd::PreTranslateMessage(pMsg);
		}
		else
		if( pMsg->wParam == VK_F4 )
		{
//			OutputDebugString( "(F4)\n" );
			SendMessage( WM_ON_DROPDOWN_BUTTON );
			Invalidate();
		}
		else
		if( pMsg->wParam == VK_UP )
		{
//			OutputDebugString( "(VK_UP)\n" );
			SelPrevItem();
		}
		else
		if( pMsg->wParam == VK_DOWN )
		{
//			OutputDebugString( "(VK_DOWN)\n" );
			SelNextItem();
		}
		else
		if( pMsg->wParam == VK_DELETE || pMsg->wParam == VK_BACK )
		{
			m_bAutoAppend = FALSE;
			return CWnd::PreTranslateMessage(pMsg);
		}
		else
		if( pMsg->wParam == VK_RIGHT )
		{
			if( m_dwACBStyle & ACBS_AUTOAPPEND )
			{
				// If the cursor is at the end of the text, show autosuggest text
				if( m_pEdit )
				{
					int nS, nE;
					m_pEdit->GetSel( nS, nE );
					if( nS == nE && nS == m_pEdit->LineLength() )
					{
						OnUpdateEdit();
					}
					else
					{
						return CWnd::PreTranslateMessage(pMsg);
					}
				}
			}
			else
			{
				return CWnd::PreTranslateMessage(pMsg);
			}
		}
		else
		{
//			OutputDebugString( "<not handled>\n" );
			return CWnd::PreTranslateMessage(pMsg);
		}
		return TRUE;
	}
	else
	if( pMsg->message == WM_SYSKEYDOWN )
	{
		if( pMsg->wParam == VK_DOWN ||
			pMsg->wParam == VK_UP )
		{
//			OutputDebugString( "(ALT-VK_DOWN)\n" );
			SendMessage( WM_ON_DROPDOWN_BUTTON );
			Invalidate();
		}
	}

	return CWnd::PreTranslateMessage(pMsg);
}
void CAdvComboBox::SelPrevItem()
{
	if( m_pDropWnd )
	{
		int nPos = m_pDropWnd->GetListBoxPtr()->GetCurSel();
		if( nPos > 0 )
		{
			m_pDropWnd->GetListBoxPtr()->SetCurSel( --nPos );
		}
	}
	else
	{
		m_iter = m_list.begin();
		advance( m_iter, m_nCurSel );
		--m_iter;
		int nOldSel = m_nCurSel;
		int nPos = m_nCurSel;
		while( m_iter != m_list.end() )
		{
			nPos--;
			if( !m_iter->bDisabled )
			{
				m_strEdit = m_iter->strText;
				if( m_pEdit )
					m_pEdit->SetWindowText( m_strEdit.c_str() );
				m_nCurSel = nPos;
				Invalidate();
				break;
			}
			--m_iter;
		}
		if( nOldSel != m_nCurSel )
		{
			// Send message to parent(dialog)
			int nId = GetDlgCtrlID();
			GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(nId,CBN_SELENDOK), (LPARAM)m_hWnd );
			GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(nId,CBN_SELCHANGE), (LPARAM)m_hWnd );
		}
	}
}
void CAdvComboBox::SelNextItem()
{
	if( m_pDropWnd )
	{
		int nPos = m_pDropWnd->GetListBoxPtr()->GetCurSel();
		if( nPos < m_pDropWnd->GetListBoxPtr()->GetCount() )
		{
			m_pDropWnd->GetListBoxPtr()->SetCurSel( ++nPos );
		}
	}
	else
	{
		m_iter = m_list.begin();
		advance( m_iter, m_nCurSel );
		++m_iter;
		int nOldSel = m_nCurSel;
		int nPos = m_nCurSel;
		while( m_iter != m_list.end() )
		{
			nPos++;
			if( !m_iter->bDisabled )
			{
				m_strEdit = m_iter->strText;
				if( m_pEdit )
					m_pEdit->SetWindowText( m_strEdit.c_str() );
				Invalidate();
				m_nCurSel = nPos;
				break;
			}
			++m_iter;
		}
		if( nOldSel != m_nCurSel )
		{
			// Send message to parent(dialog)
			int nId = GetDlgCtrlID();
			GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(nId,CBN_SELENDOK), (LPARAM)m_hWnd );
			GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(nId,CBN_SELCHANGE), (LPARAM)m_hWnd );
		}
	}
}
int CAdvComboBox::GetTopIndex()
{
	if( m_bDropListVisible )
	{
		if( m_pDropWnd )
		{
			return m_pDropWnd->GetListBoxPtr()->GetTopIndex();
		}
	}
	return CB_ERR;
}

int CAdvComboBox::SetTopIndex(int nIndex)
{
	if( m_bDropListVisible )
	{
		if( m_pDropWnd )
		{
			return m_pDropWnd->GetListBoxPtr()->SetTopIndex(nIndex);
		}
	}
	return CB_ERR;
}

//
// Will not allocate anything. I can't see the need in doing that.
// Everything is stored in a STL list.
int CAdvComboBox::InitStorage(int nItems, UINT nBytes)
{
	return nItems;
}


void CAdvComboBox::ShowDropDown(BOOL bShowIt)
{
	if( bShowIt )
	{
		if( !m_bDropListVisible )
		{
			SendMessage( WM_ON_DROPDOWN_BUTTON );
			Invalidate();
		}
	}
	else
	{
		if( m_bDropListVisible )
		{
			SendMessage( WM_DESTROY_DROPLIST );
			Invalidate();
		}
	}
}

void CAdvComboBox::GetDroppedControlRect(LPRECT lprect)
{
	if( m_bDropListVisible )
	{
		m_pDropWnd->GetWindowRect( lprect );
	}
}

BOOL CAdvComboBox::GetDroppedState()
{
	return m_bDropListVisible;
}

int CAdvComboBox::SetExtendedUI(BOOL bExtended)
{
	return CB_OKAY;
}

BOOL CAdvComboBox::GetExtendedUI()
{
	return FALSE;
}

int CAdvComboBox::DeleteString(UINT nIndex)
{
	m_iter = m_list.begin();
	advance( m_iter, nIndex );
	if( m_iter != m_list.end() || nIndex > m_list.size() )
	{
		m_list.erase( m_iter );
		return (int)m_list.size();
	}
	else
	{
		return CB_ERR;
	}
}

int CAdvComboBox::InsertString(int nIndex, LPCTSTR lpszString)
{
	LIST_ITEM item;
	item.strText = lpszString;
	if( nIndex == -1 || (nIndex > (int)m_list.size()) )
	{
		m_list.push_back( item );
		return (int)m_list.size()-1;
	}

	if( nIndex == 0 && (m_list.size()==0) )
	{
		m_list.push_back( item );
		return 0;
	}

	m_iter = m_list.begin();
	advance( m_iter, nIndex );
	if( m_iter != m_list.end() )
	{
		m_iter = m_list.insert( m_iter, item );
		int nPos = 0;
		while( m_iter != m_list.begin() )
		{
			nPos++;
			--m_iter;
		}
		if( nIndex <= m_nCurSel )
		{
			m_nCurSel++;
		}
		return nPos;
	}
	return CB_ERR;
}




DWORD CAdvComboBox::GetEditSel()
{
	if( (GetStyle() & CBS_DROPDOWN) && !(GetStyle() & CBS_SIMPLE) )	// == CBS_DROPDOWN
	{
		if( m_pEdit )
		{
			return m_pEdit->GetSel();
		}
	}
	return CB_ERR;
}

BOOL CAdvComboBox::SetEditSel(int nStartChar, int nEndChar)
{
	if( (GetStyle() & CBS_DROPDOWN) && !(GetStyle() & CBS_SIMPLE) )	// == CBS_DROPDOWN
	{
		if( m_pEdit )
		{
			m_pEdit->SetSel( nStartChar, nEndChar, TRUE );
			return TRUE;
		}
	}
	return CB_ERR;
}


void CAdvComboBox::OnChangeEdit()
{
	if( !m_pDropWnd )
	{
		// Send message to parent(dialog)
		int nId = GetDlgCtrlID();
		GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(nId,CBN_EDITCHANGE), (LPARAM)m_hWnd );
	}
}

void CAdvComboBox::OnUpdateEdit()
{
	static bool bAutoAppendInProgress;
	CString strEdit;
	m_pEdit->GetWindowText( strEdit );
	if( GetFocus() == m_pEdit )
	{
		if( !bAutoAppendInProgress )
		{
//			m_nCurSel = -1;
			if( m_dwACBStyle & ACBS_AUTOAPPEND && m_bAutoAppend )
			{
				string str = (LPCTSTR)strEdit;
				int nEditLen = (int)str.length();
				if( !nEditLen )
					return;
				int nStartSel;
				int nEndSel;

				m_pEdit->GetSel( nStartSel, nEndSel );

				LIST_ITEM item;
				m_iter = m_list.begin();
				while( m_iter != m_list.end() )
				{
					item = *m_iter;
					int nPos = (int)m_iter->strText.find( str, 0 );
					if( nPos == 0 )
					{
						bAutoAppendInProgress = true;
						m_pEdit->SetWindowText( m_iter->strText.c_str() );
						m_pEdit->SetSel( nEditLen, (int)m_iter->strText.length(), TRUE );
						bAutoAppendInProgress = false;
						break;
					}
					++m_iter;
				}
			}
		}

		if( !bAutoAppendInProgress )
		{
			if( m_dwACBStyle & ACBS_AUTOSUGGEST )
			{
				list<LIST_ITEM> suggestlist;
				list<LIST_ITEM>::iterator suggestiter;
				string str = (LPCTSTR)strEdit;
				int nEditLen = (int)str.length();
				if( !nEditLen )
				{
					if( m_pDropWnd )
						SendMessage( WM_DESTROY_DROPLIST );
					return;
				}
				int nStartSel;
				int nEndSel;

				m_pEdit->GetSel( nStartSel, nEndSel );

				LIST_ITEM item;
				m_iter = m_list.begin();
				while( m_iter != m_list.end() )
				{
					item = *m_iter;
					int nPos = (int)m_iter->strText.find( str, 0 );
					if( nPos == 0 )
					{
						suggestlist.push_back( item );
					}
					++m_iter;
				}
				if( m_pDropWnd )
					SendMessage( WM_DESTROY_DROPLIST );
				if( suggestlist.size() != 0 )
					CreateDropList( suggestlist );
			}
		}
	}

	if( !m_pDropWnd )
	{
		// Send message to parent(dialog)
		int nId = GetDlgCtrlID();
		GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(nId,CBN_EDITUPDATE), (LPARAM)m_hWnd );
	}
}






void CAdvComboBox::OnEnable(BOOL bEnable) 
{
	CWnd::OnEnable(bEnable);
	
	Invalidate();
	if( m_pEdit )
	{
		m_pEdit->EnableWindow( bEnable );
	}
	
}

BOOL CAdvComboBox::LimitText(int nMaxChars)
{
	if( m_pEdit )
	{
		int nCh = !nMaxChars ? 65535 : nMaxChars;
		m_pEdit->SetLimitText( nCh );
		return TRUE;
	}
	else
	{
		return CB_ERR;
	}
}

void CAdvComboBox::SetMinVisibleItems(int nMinItems)
{
	m_nMinVisItems = nMinItems;
}

int CAdvComboBox::GetMinVisibleItems()
{
	return m_nMinVisItems;
}

void CAdvComboBox::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	bool bChange = m_bDropButtonHot;

	if( (GetStyle() & CBS_DROPDOWN) && !(GetStyle() & CBS_SIMPLE) )  // == CBS_DROPDOWN
	{
		if( m_rcDropButton.PtInRect( point ) )
		{
			m_bDropButtonHot = true;
		}
		else
		{
			m_bDropButtonHot = false;
		}
	}
	else
	if( (GetStyle() & CBS_DROPDOWN) && (GetStyle() & CBS_SIMPLE) )  // == CBS_DROPDOWNLIST
	{
		GetClientRect( &m_rcCombo );
		if( m_rcCombo.PtInRect( point ) )
		{
			m_bDropButtonHot = true;
		}
		else
		{
			m_bDropButtonHot = false;
		}
	}


	if( bChange != m_bDropButtonHot )
	{
		if( !m_bTrackMouseLeave )
		{
			//
			// Could not use TrackMouseEvent() under Release. A bug appeared 
			// the second time the dropwindow was shown, and I did not 
			// have to strenght to go look for it. :)
/*			TRACKMOUSEEVENT tme;
			tme.cbSize = sizeof(tme);
			tme.dwFlags = TME_LEAVE;
			tme.hwndTrack = m_hWnd;
			TrackMouseEvent(&tme);*/

			m_bTrackMouseLeave = true;
			SetTimer(1, 50, NULL);
		}

		InvalidateRect( &m_rcDropButton );
	}

	CWnd::OnMouseMove(nFlags, point);

	/*RECT rct;
	GetWindowRect(&rct);

	CWnd* pWnd(GetParent());
	pWnd->ScreenToClient(&rct);

	point.Offset(rct.left,rct.top);

	pWnd->PostMessage(WM_MOUSEMOVE,(WPARAM)nFlags,LPARAM(point.y<<16|point.x));*/
}

void CAdvComboBox::OnMouseLeave() 
{
	// TODO: Add your message handler code here and/or call default
	bool bChange = m_bDropButtonHot;
	m_bDropButtonHot = false;
	m_bTrackMouseLeave = false;

	if( bChange != m_bDropButtonHot )
		InvalidateRect( &m_rcDropButton );
}


void CAdvComboBox::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	if( nIDEvent == 1 )
	{
		CPoint point;
		GetCursorPos( &point );
		ScreenToClient( &point );
		if( (GetStyle() & CBS_DROPDOWN) && !(GetStyle() & CBS_SIMPLE) )  // == CBS_DROPDOWN
		{
			if( !m_rcDropButton.PtInRect( point ) )
			{
				KillTimer( 1 );
				OnMouseLeave();
			}
		}
		else
		if( (GetStyle() & CBS_DROPDOWN) && (GetStyle() & CBS_SIMPLE) )  // == CBS_DROPDOWNLIST
		{
			GetClientRect( &m_rcCombo );
			if( !m_rcCombo.PtInRect( point ) )
			{
				KillTimer( 1 );
				OnMouseLeave();
			}
		}

	}
	CWnd::OnTimer(nIDEvent);
}


int CAdvComboBox::GetDefaultVisibleItems()
{
	return m_nDefaultDropItems;
}

void CAdvComboBox::SetDefaultVisibleItems(int nItems)
{
	m_nDefaultDropItems = nItems;
}