// ResizableSheet.cpp : implementation file
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2002 by Paolo Messina
// (http://www.geocities.com/ppescher - ppescher@yahoo.com)
//
// The contents of this file are subject to the Artistic License (the "License").
// You may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.opensource.org/licenses/artistic-license.html
//
// If you find this code useful, credits would be nice!
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "ResizableSheet.h"

/////////////////////////////////////////////////////////////////////////////
// CResizableSheet

IMPLEMENT_DYNAMIC(CResizableSheet, CPropertySheet)

inline void CResizableSheet::PrivateConstruct()
{
    m_bEnableSaveRestore = FALSE;
    m_bSavePage = FALSE;
    m_dwGripTempState = 1;
    m_bRectOnly = FALSE;
}


CResizableSheet::CResizableSheet()
{
    PrivateConstruct();
}

CResizableSheet::CResizableSheet(UINT nIDCaption, CWnd *pParentWnd, UINT iSelectPage)
     : CPropertySheet(nIDCaption, pParentWnd, iSelectPage)
{
    PrivateConstruct();
}

CResizableSheet::CResizableSheet(LPCTSTR pszCaption, CWnd *pParentWnd, UINT iSelectPage)
     : CPropertySheet(pszCaption, pParentWnd, iSelectPage)
{
    PrivateConstruct();
}

CResizableSheet::~CResizableSheet()
{
}

BEGIN_MESSAGE_MAP(CResizableSheet, CPropertySheet)
    //{{AFX_MSG_MAP(CResizableSheet)
    ON_WM_GETMINMAXINFO()
    ON_WM_SIZE()
    ON_WM_DESTROY()
    ON_WM_CREATE()
    ON_WM_ERASEBKGND()
    //}}AFX_MSG_MAP
    ON_NOTIFY_REFLECT_EX(PSN_SETACTIVE, OnPageChanging)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CResizableSheet message handlers

int CResizableSheet::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CPropertySheet::OnCreate(lpCreateStruct) == -1)
        return -1;

    // keep client area
    CRect rect;
    GetClientRect(&rect);
    // set resizable style
    ModifyStyle(DS_MODALFRAME, WS_POPUP | WS_THICKFRAME);
    // adjust size to reflect new style
    ::AdjustWindowRectEx(&rect, GetStyle(),
        ::IsMenu(GetMenu()->GetSafeHmenu()), GetExStyle());
    SetWindowPos(NULL, 0, 0, rect.Width(), rect.Height(), SWP_FRAMECHANGED|
        SWP_NOMOVE|SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOREPOSITION);

    // create and init the size-grip
    if (!CreateSizeGrip())
        return -1;

    return 0;
}

BOOL CResizableSheet::OnInitDialog()
{
    BOOL bResult = CPropertySheet::OnInitDialog();

    // set the initial size as the min track size
    CRect rc;
    GetWindowRect(&rc);
    SetMinTrackSize(rc.Size());

    // initialize layout
    PresetLayout();

    // prevent flickering
    GetTabControl()->ModifyStyle(0, WS_CLIPSIBLINGS);

    return bResult;
}

void CResizableSheet::OnDestroy()
{
    if (m_bEnableSaveRestore)
    {
        SaveWindowRect(m_sSection, m_bRectOnly);
        SavePage();
    }

    RemoveAllAnchors();

    CPropertySheet::OnDestroy();
}

// maps an index to a button ID and vice-versa
static UINT _propButtons[] =
{
    IDOK, IDCANCEL, ID_APPLY_NOW, IDHELP,
    ID_WIZBACK, ID_WIZNEXT, ID_WIZFINISH
};
const int _propButtonsCount = _countof(_propButtons);

// horizontal line in wizard mode
#define ID_WIZLINE  ID_WIZFINISH+1

void CResizableSheet::PresetLayout()
{
    if (IsWizard()) // wizard mode
    {
        // hide tab control
        GetTabControl()->ShowWindow(SW_HIDE);

        AddAnchor(ID_WIZLINE, BOTTOM_LEFT, BOTTOM_RIGHT);
    }
    else    // tab mode
    {
        AddAnchor(AFX_IDC_TAB_CONTROL, TOP_LEFT, BOTTOM_RIGHT);
    }

    // add a callback for active page (which can change at run-time)
    AddAnchorCallback(1);

    // use *total* parent size to have correct margins
    CRect rectPage, rectSheet;
    GetTotalClientRect(&rectSheet);

    GetActivePage()->GetWindowRect(&rectPage);
    ::MapWindowPoints(NULL, m_hWnd, (LPPOINT)&rectPage, 2);

    // pre-calculate margins
    m_sizePageTL = rectPage.TopLeft() - rectSheet.TopLeft();
    m_sizePageBR = rectPage.BottomRight() - rectSheet.BottomRight();

    // add all possible buttons, if they exist
    for (int i = 0; i < _propButtonsCount; i++)
    {
        if (NULL != GetDlgItem(_propButtons[i]))
            AddAnchor(_propButtons[i], BOTTOM_RIGHT);
    }
}

BOOL CResizableSheet::ArrangeLayoutCallback(LayoutInfo &layout)
{
    if (layout.nCallbackID != 1)    // we only added 1 callback
        return CResizableLayout::ArrangeLayoutCallback(layout);

    // set layout info for active page
    layout.hWnd = (HWND)::SendMessage(m_hWnd, PSM_GETCURRENTPAGEHWND, 0, 0);
    if (!::IsWindow(layout.hWnd))
        return FALSE;

    // set margins
    if (IsWizard()) // wizard mode
    {
        // use pre-calculated margins
        layout.sizeMarginTL = m_sizePageTL;
        layout.sizeMarginBR = m_sizePageBR;
    }
    else    // tab mode
    {
        CTabCtrl* pTab = GetTabControl();
        ASSERT(pTab != NULL);

        // get tab position after resizing and calc page rect
        CRect rectPage, rectSheet;
        GetTotalClientRect(&rectSheet);

        VERIFY(GetAnchorPosition(pTab->m_hWnd, rectSheet, rectPage));
        pTab->AdjustRect(FALSE, &rectPage);

        // set margins
        layout.sizeMarginTL = rectPage.TopLeft() - rectSheet.TopLeft();
        layout.sizeMarginBR = rectPage.BottomRight() - rectSheet.BottomRight();
    }

    // set anchor types
    layout.sizeTypeTL = TOP_LEFT;
    layout.sizeTypeBR = BOTTOM_RIGHT;

    // use this layout info
    return TRUE;
}

void CResizableSheet::OnSize(UINT nType, int cx, int cy)
{
    CWnd::OnSize(nType, cx, cy);

    if (nType == SIZE_MAXHIDE || nType == SIZE_MAXSHOW)
        return;     // arrangement not needed

    if (nType == SIZE_MAXIMIZED)
        HideSizeGrip(&m_dwGripTempState);
    else
        ShowSizeGrip(&m_dwGripTempState);

    // update grip and layout
    UpdateSizeGrip();
    ArrangeLayout();
}

BOOL CResizableSheet::OnPageChanging(NMHDR* /*pNotifyStruct*/, LRESULT* /*pResult*/)
{
    // update new wizard page
    // active page changes after this notification
    PostMessage(WM_SIZE);

    return FALSE;   // continue routing
}

BOOL CResizableSheet::OnEraseBkgnd(CDC* pDC)
{
    // Windows XP doesn't like clipping regions ...try this!
    EraseBackground(pDC);
    return TRUE;

/*  ClipChildren(pDC);  // old-method (for safety)

    return CPropertySheet::OnEraseBkgnd(pDC);
*/
}

void CResizableSheet::OnGetMinMaxInfo(MINMAXINFO FAR* lpMMI)
{
    MinMaxInfo(lpMMI);
}

// protected members

int CResizableSheet::GetMinWidth()
{
    CWnd* pWnd = NULL;
    CRect rectWnd, rectSheet;
    GetTotalClientRect(&rectSheet);

    int max = 0, min = rectSheet.Width();
    // search for leftmost and rightmost button margins
    for (int i = 0; i < 7; i++)
    {
        pWnd = GetDlgItem(_propButtons[i]);
        // exclude not present or hidden buttons
        if (pWnd == NULL || !(pWnd->GetStyle() & WS_VISIBLE))
            continue;

        // left position is relative to the right border
        // of the parent window (negative value)
        pWnd->GetWindowRect(&rectWnd);
        ::MapWindowPoints(NULL, m_hWnd, (LPPOINT)&rectWnd, 2);
        int left = rectSheet.right - rectWnd.left;
        int right = rectSheet.right - rectWnd.right;

        if (left > max)
            max = left;
        if (right < min)
            min = right;
    }

    // sizing border width
    int border = GetSystemMetrics(SM_CXSIZEFRAME);

    // compute total width
    return max + min + 2*border;
}


// NOTE: this must be called after all the other settings
//       to have the window and its controls displayed properly
void CResizableSheet::EnableSaveRestore(LPCTSTR pszSection, BOOL bRectOnly, BOOL bWithPage)
{
    m_sSection = pszSection;
    m_bSavePage = bWithPage;

    m_bEnableSaveRestore = TRUE;
    m_bRectOnly = bRectOnly;

    // restore immediately
    LoadWindowRect(pszSection, bRectOnly);
    LoadPage();
}

// private memebers

// used to save/restore active page
// either in the registry or a private .INI file
// depending on your application settings

#define ACTIVEPAGE  _T("ActivePage")

void CResizableSheet::SavePage()
{
    if (!m_bSavePage)
        return;

    // saves active page index, zero (the first) if problems
    // cannot use GetActivePage, because it always fails

    CTabCtrl *pTab = GetTabControl();
    int page = 0;

    if (pTab != NULL)
        page = pTab->GetCurSel();
    if (page < 0)
        page = 0;

    AfxGetApp()->WriteProfileInt(m_sSection, ACTIVEPAGE, page);
}

void CResizableSheet::LoadPage()
{
    // restore active page, zero (the first) if not found
    int page = AfxGetApp()->GetProfileInt(m_sSection, ACTIVEPAGE, 0);

    if (m_bSavePage)
    {
        SetActivePage(page);
        ArrangeLayout();    // needs refresh
    }
}

void CResizableSheet::RefreshLayout()
{
    SendMessage(WM_SIZE);
}