// PropTreeItemCombo.cpp : implementation file
//
//  Copyright (C) 1998-2001 Scott Ramsay
//	sramsay@gonavi.com
//	http://www.gonavi.com
//
//  This material is provided "as is", with absolutely no warranty expressed
//  or implied. Any use is at your own risk.
// 
//  Permission to use or copy this software for any purpose is hereby granted 
//  without fee, provided the above notices are retained on all copies.
//  Permission to modify the code and to distribute modified code is granted,
//  provided the above notices are retained, and a notice that the code was
//  modified is included with the above copyright notice.
// 
//	If you use this code, drop me an email.  I'd like to know if you find the code
//	useful.

#include "stdafx.h"
#include "Resource.h"
#include "PropCtrl.h"
#include "PropItemCombo.h"

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

#define DROPDOWN_HEIGHT			150

/////////////////////////////////////////////////////////////////////////////
// CPropItemCombo

CPropItemCombo::CPropItemCombo()
{
	m_nDropHeight = DROPDOWN_HEIGHT,
	m_pText = NULL;	
	m_pDouble = NULL;	
	m_pInt = NULL;
	m_nItemType = ITEMTYPE_COMBOBOX;
}

CPropItemCombo::~CPropItemCombo()
{
}


BEGIN_MESSAGE_MAP(CPropItemCombo, CComboBox)
	//{{AFX_MSG_MAP(CPropItemCombo)
	ON_CONTROL_REFLECT(CBN_SELCHANGE, OnSelchange)
	ON_CONTROL_REFLECT(CBN_EDITCHANGE, OnEditchange)
	ON_CONTROL_REFLECT(CBN_KILLFOCUS, OnKillfocus)
	ON_CONTROL_REFLECT(CBN_DROPDOWN, OnDropdown)
//	ON_BN_CLICKED(IDC_BUTTON, OnButtonClick)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPropItemCombo message handlers

void CPropItemCombo::DrawAttribute(CDC* pDC, const RECT& rc)
{
	ASSERT(m_pProp!=NULL);

	// verify the window has been created
	if (!IsWindow(m_hWnd))
	{
		TRACE0("CPropItemCombo::DrawAttribute() - The window has not been created\n");
		return;
	}

//	pDC->SelectObject(IsReadOnly() ? m_pProp->GetNormalFont() : m_pProp->GetBoldFont());	
	pDC->SelectObject(m_pProp->GetNormalFont());
	if (IsReadOnly())
		pDC->SetTextColor(RGB(140,140,140));
	else
		pDC->SetTextColor(RGB(0,0,0));
	
	pDC->SetBkMode(TRANSPARENT);

	CRect r = rc;
	
	CString csText = GetValueText();
	
	pDC->DrawText(csText, r, DT_SINGLELINE|DT_VCENTER);

}

void CPropItemCombo::OnMove()
{
	if (IsWindow(m_hWnd) && IsWindowVisible())
		SetWindowPos(NULL, m_rc.left, m_rc.top, m_rc.Width() + 1, 
					m_rc.Height(), SWP_NOZORDER|SWP_SHOWWINDOW);
}

void CPropItemCombo::OnActivate()
{
	// activate the combo box
	SetWindowPos(NULL, m_rc.left, m_rc.top, m_rc.Width(), 
		m_rc.Height() + m_nDropHeight, SWP_NOZORDER|SWP_SHOWWINDOW);

	SetWindowText(GetValueText());
	
	if (!m_bEdit && GetCount())
		ShowDropDown(TRUE);
	
	// 原来有按钮的话先隐藏先隐藏
	ShowButton(FALSE);
	ShowSpinCtrl(FALSE);

	// add button on right
	if (m_bHasBt)
		CreateButton(this);
	if (m_bHasSpinCtrl)
		CreateSpinCtrl(this);

	SetFocus();
}	


BOOL CPropItemCombo::CreateDropListComb(int* pInt)
{
	DWORD dwStyle = WS_VISIBLE|WS_CHILD|WS_VSCROLL|CBS_DROPDOWNLIST;
	m_pInt = pInt;
	m_bEdit = FALSE;
	return CreateComb(dwStyle);
}

BOOL CPropItemCombo::CreateDropListComb(CString* pCString)
{
	DWORD dwStyle = WS_VISIBLE|WS_CHILD|WS_VSCROLL|CBS_DROPDOWNLIST;
	m_pText = pCString;
	m_bEdit = FALSE;
	return CreateComb(dwStyle);
}

BOOL CPropItemCombo::CreateDropDownComb(CString* pCString)
{
	DWORD dwStyle = WS_VISIBLE|WS_CHILD|WS_VSCROLL|CBS_DROPDOWN;
	m_pText = pCString;
	m_bEdit = TRUE;
	return CreateComb(dwStyle);
}

BOOL CPropItemCombo::CreateDropDownComb(double* pDouble)
{
	DWORD dwStyle = WS_VISIBLE|WS_CHILD|WS_VSCROLL|CBS_DROPDOWN;
	m_pDouble = pDouble;
	m_bEdit = TRUE;
	return CreateComb(dwStyle);
}

BOOL CPropItemCombo::CreateComb(DWORD dwStyle)
{
	ASSERT(m_pProp!=NULL);

	if (IsWindow(m_hWnd))
		DestroyWindow();

	// force as not visible child window
	dwStyle = (WS_CHILD|WS_VSCROLL|dwStyle) & ~WS_VISIBLE;

	if (!Create(dwStyle, CRect(0,0,0,0), m_pProp->GetCtrlParent(), GetCtrlID()))
	{
		TRACE0("CPropItemCombo::CreateComboBox() - failed to create combo box\n");
		return FALSE;
	}

	SendMessage(WM_SETFONT, (WPARAM)m_pProp->GetNormalFont()->m_hObject);

	return TRUE;
}

LONG CPropItemCombo::FindCBData(LPARAM lParam)
{
	LONG idx;
	
	for (idx = 0; idx < GetCount(); idx++)
	{
		if (GetItemData(idx)==(DWORD)lParam)
			return idx;
	}

	return CB_ERR;
}

void CPropItemCombo::OnRefresh()
{
	
}

void CPropItemCombo::OnCommit()
{
}

void CPropItemCombo::OnSelchange() 
{
	CommitChanges();

	ShowWindow(SW_HIDE);
	
	CString csText;	
	GetLBText(GetCurSel(), csText);
	
	if (NULL != m_pText)
		*m_pText = csText;
	else if (NULL != m_pDouble)
		*m_pDouble = _tstof(csText);
	else if (NULL != m_pInt)
		*m_pInt = GetCurSel();

	CWnd* pWnd = m_pProp->GetParent();
	if (NULL != pWnd)
	{
		::SendMessage(pWnd->m_hWnd, WM_SELECTCHANGED, (WPARAM)ITEMTYPE_COMBOBOX, (LPARAM)this);
	}
}

/*----------------------------------------------------------------------------*
* 描述:  编辑修改事件，肯定是DropDown，没有int型，只取当前字符
* 备注:   
-----------------------------------------------------------------------------*/
void CPropItemCombo::OnEditchange() 
{
	CommitChanges();
	
	CString csText;	
	GetWindowText(csText);
		
	if (NULL != m_pText)
		*m_pText = csText;
	else if (NULL != m_pDouble)
		*m_pDouble = _tstof(csText);
}

void CPropItemCombo::OnKillfocus() 
{
	CommitChanges();

	ShowWindow(SW_HIDE);
}

void CPropItemCombo::OnDropdown()
{
	RecalcDropWidth();
}

void CPropItemCombo::SetDropDownHeight(LONG nDropHeight)
{
	m_nDropHeight = nDropHeight;
}


LONG CPropItemCombo::GetDropDownHeight()
{
	return m_nDropHeight;
}

/*----------------------------------------------------------------------------*
* 描述:   得到要Draw画出显示的字符
* 备注:   
-----------------------------------------------------------------------------*/
CString CPropItemCombo::GetValueText()
{
	CString csText;
	if (NULL != m_pText)
		csText =  *m_pText;
	else if (NULL != m_pDouble)
	{
		csText.Format(_T("%.10f"), *m_pDouble);
		csText.TrimRight(_T("0"));
		csText.TrimRight(_T("."));
	}
	else if (NULL != m_pInt && *m_pInt > -1 && *m_pInt < GetCount())
	{
		GetLBText(*m_pInt, csText);
	}
	
	return csText;
}

/*----------------------------------------------------------------------------*
* 描述:   切换到给定的字符串
* 备注:   如果没有，则添加
-----------------------------------------------------------------------------*/
void CPropItemCombo::SetSelText(CString csText)
{
	int nIndex = FindStringExact(0, csText);
	if (nIndex < 0 && !csText.IsEmpty())
		nIndex = AddString(csText);

	SetCurSel(nIndex);
	if (NULL != m_pInt)
		*m_pInt = nIndex;
	else if (NULL != m_pText)
		*m_pText = csText;
}

// 自动计算宽度
void CPropItemCombo::RecalcDropWidth()
{
    // Reset the dropped width
    int nNumEntries = GetCount();
    int nWidth = 0;
    CString str;
	
    CClientDC dc(this);
    int nSave = dc.SaveDC();
    dc.SelectObject(GetFont());
	
    int nScrollWidth = ::GetSystemMetrics(SM_CXVSCROLL);
	int nLength(0);
    for (int i = 0; i < nNumEntries; i++)
    {
        GetLBText(i, str);
        nLength = dc.GetTextExtent(str).cx + nScrollWidth;
        nWidth = max(nWidth, nLength);
    }
    
    // Add margin space to the calculations
    nWidth += dc.GetTextExtent(_T("0")).cx;
	
    dc.RestoreDC(nSave);
    SetDroppedWidth(nWidth);
}