//==============================================================================
// File:		PopupEdit.cpp
//
// Description:	A subclassed edit control that works as a popup edit
//              similar to the one used by the ListView control
//
// Revisions: 	12/24/1999 - created
//
//==============================================================================
// Copyright(C) 1999, Tomas Restrepo. All rights reserved
//==============================================================================

#include "stdafx.h"
#include "PopupEdit.h"


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

// message use to notify the window of the text received
// a pointer to the string is in lParam
//
const UINT PopupEdit::PE_TEXTIN = ::RegisterWindowMessage ( _T("PE_TEXTIN_{04247C64-0BBE-424d-8459-FC2A1D7039AE}") );
const UINT PopupEdit::PeExtraSpace = 20; // extra space left blank on the control

/////////////////////////////////////////////////////////////////////////////
// PopupEdit

PopupEdit::PopupEdit()
    : m_OriginalRect ( 0, 0, 0, 0 )
{
}

PopupEdit::~PopupEdit()
{
}


BEGIN_MESSAGE_MAP(PopupEdit, CEdit)
	//{{AFX_MSG_MAP(PopupEdit)
	ON_CONTROL_REFLECT(EN_KILLFOCUS, OnKillfocus)
	ON_CONTROL_REFLECT(EN_UPDATE, OnUpdate)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// PopupEdit message handlers
BOOL PopupEdit::Create (
                    DWORD       dwStyle, 
                    const RECT& rect, 
                    CWnd*       pParentWnd, 
                    UINT        nID
                ) 
{
    //
    // adjust the styles: We need to trap return and
    // make sure we auto scroll horizontally.
    // we also need to make sure we start invisible
    //
	dwStyle |= WS_CHILD | ES_WANTRETURN | ES_AUTOHSCROLL;
    dwStyle &= ~WS_VISIBLE;

    return CEdit::Create ( dwStyle, rect, pParentWnd, nID );
}

//==========================================================
// PopupEdit::Show()
//	Description
//      Makes the edit control visible at the specified 
//      location
//		
//	Parameters
//		rc		    - rectangle where the control is shown
//      InitialText - initial text on the control
//==========================================================
void PopupEdit::Show (
            const CRect& rc, 
            LPCTSTR      InitialText /* = _T("") */
        )
{
    m_OriginalRect = rc;
    SetWindowText ( InitialText );
    SetSel ( 0, -1 );

    MoveWindow ( &rc );
    ResizeToFit ( );
    ShowWindow ( SW_SHOW );
    SetFocus ( );
}


void PopupEdit::OnKillfocus ( ) 
{
    SetWindowText ( _T("") );	
    ShowWindow ( SW_HIDE );
}


BOOL PopupEdit::PreTranslateMessage(MSG* pMsg) 
{
    if ( ::GetFocus ( ) == m_hWnd )
    {
        if ( pMsg->message == WM_KEYDOWN )
        {
            if ( (UINT)(pMsg->wParam) == VK_RETURN )
            {
                CString Text;
                GetWindowText ( Text );
                CWnd* pParentWnd = GetParent ( );
                ASSERT ( pParentWnd != NULL );
                pParentWnd->SendMessage ( PE_TEXTIN, 0, (LPARAM)(LPCTSTR)Text );

                ShowWindow ( SW_HIDE );
                return TRUE;
            } 
            else if ( (UINT)(pMsg->wParam) == VK_ESCAPE )
            {
                ShowWindow ( SW_HIDE );
                return TRUE;
            }
        }
    }
  	return CEdit::PreTranslateMessage(pMsg);
}

//==========================================================
// PopupEdit::ResizeToFit()
//	Description
//      Resizes the control to fit the text contained
//==========================================================
void PopupEdit::ResizeToFit ( void )
{
    CRect   ParentRect(0,0,0,0);
    CRect   WndRect(0,0,0,0);
    CRect   ClientRect(0,0,0,0);

    CWnd* pParentWnd = GetParent ( );
    ASSERT ( pParentWnd != NULL );
    pParentWnd->GetClientRect ( &ParentRect );

    GetWindowRect ( &WndRect );
    pParentWnd->ScreenToClient ( &WndRect );
    GetClientRect ( &ClientRect );
    ClientToScreen ( &ClientRect );
    pParentWnd->ScreenToClient ( &ClientRect );

    //
    // save the border width, we need it
    // later to calculate the window rect
    //
    int BorderWidth = WndRect.Width ( ) - ClientRect.Width ( );

    CDC* pDC = GetDC ( );
    pParentWnd->SendMessage ( WM_CTLCOLOREDIT, (WPARAM)pDC->m_hAttribDC, (LPARAM)m_hWnd );

    //
    // get the space needed to 
    // print out the new string
    //
    CString Text; GetWindowText ( Text );
    pDC->DrawText ( 
            Text, 
            &ClientRect, 
            DT_CALCRECT | DT_EXPANDTABS | DT_LEFT |
            DT_NOCLIP | DT_NOPREFIX 
        );

    //
    // calculate the new window rect
    //
    if ( Text != _T("") )
    {
        WndRect.right = WndRect.left + ClientRect.Width ( ) + BorderWidth + PeExtraSpace;
        WndRect.right = max ( WndRect.right, m_OriginalRect.right );
        WndRect.right = min ( WndRect.right, ParentRect.right );
    }
    else
    {
        //
        // if Text == "", then DrawText() doesn't modify the 
        // rectangle, so we need to set it correctly
        //

        WndRect.right = m_OriginalRect.right;
    }

    MoveWindow ( &WndRect );
}


//==========================================================
// PopupEdit::OnUpdate()
//	Description
//      Resize the control if needed when the text changes
//		
//==========================================================
void PopupEdit::OnUpdate() 
{
    if ( GetStyle ( ) & PE_AUTOHEXPAND )
        ResizeToFit ( );
}