wizard.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name:        generic/wizard.cpp
// Purpose:     generic implementation of wxWizard class
// Author:      Vadim Zeitlin
// Modified by: Robert Cavanaugh
//              1) Added capability for wxWizardPage to accept resources
//              2) Added "Help" button handler stub
//              3) Fixed ShowPage() bug on displaying bitmaps
//              Robert Vazan (sizers)
// Created:     15.08.99
// RCS-ID:      $Id: wizard.cpp,v 1.63 2005/09/20 10:06:58 JS Exp $
// Copyright:   (c) 1999 Vadim Zeitlin <[e-mail]>
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "wizardg.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_WIZARDDLG

#ifndef WX_PRECOMP
    #include "wx/dynarray.h"
    #include "wx/intl.h"
    #include "wx/statbmp.h"
    #include "wx/button.h"
#endif //WX_PRECOMP

#include "wx/statline.h"
#include "wx/sizer.h"
#include "wx/settings.h"

#include "wx/wizard.h"

// ----------------------------------------------------------------------------
// wxWizardSizer
// ----------------------------------------------------------------------------

class wxWizardSizer : public wxSizer
{
public:
    wxWizardSizer(wxWizard *owner);

    void RecalcSizes();
    wxSize CalcMin();

    wxSize GetMaxChildSize();
    int Border() const;

private:
    wxSize SiblingSize(wxSizerItem *child);

    wxWizard *m_owner;
    bool m_childSizeValid;
    wxSize m_childSize;
};

// ----------------------------------------------------------------------------
// event tables and such
// ----------------------------------------------------------------------------

DEFINE_EVENT_TYPE(wxEVT_WIZARD_PAGE_CHANGED)
DEFINE_EVENT_TYPE(wxEVT_WIZARD_PAGE_CHANGING)
DEFINE_EVENT_TYPE(wxEVT_WIZARD_CANCEL)
DEFINE_EVENT_TYPE(wxEVT_WIZARD_FINISHED)
DEFINE_EVENT_TYPE(wxEVT_WIZARD_HELP)

BEGIN_EVENT_TABLE(wxWizard, wxDialog)
    EVT_BUTTON(wxID_CANCEL, wxWizard::OnCancel)
    EVT_BUTTON(wxID_BACKWARD, wxWizard::OnBackOrNext)
    EVT_BUTTON(wxID_FORWARD, wxWizard::OnBackOrNext)
    EVT_BUTTON(wxID_HELP, wxWizard::OnHelp)

    EVT_WIZARD_PAGE_CHANGED(wxID_ANY, wxWizard::OnWizEvent)
    EVT_WIZARD_PAGE_CHANGING(wxID_ANY, wxWizard::OnWizEvent)
    EVT_WIZARD_CANCEL(wxID_ANY, wxWizard::OnWizEvent)
    EVT_WIZARD_FINISHED(wxID_ANY, wxWizard::OnWizEvent)
    EVT_WIZARD_HELP(wxID_ANY, wxWizard::OnWizEvent)
END_EVENT_TABLE()

IMPLEMENT_DYNAMIC_CLASS(wxWizard, wxDialog)

/*
    TODO PROPERTIES :
    wxWizard
        extstyle
        title
*/

IMPLEMENT_ABSTRACT_CLASS(wxWizardPage, wxPanel)
IMPLEMENT_DYNAMIC_CLASS(wxWizardPageSimple, wxWizardPage)
IMPLEMENT_DYNAMIC_CLASS(wxWizardEvent, wxNotifyEvent)

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// wxWizardPage
// ----------------------------------------------------------------------------

void wxWizardPage::Init()
{
    m_bitmap = wxNullBitmap;
}

wxWizardPage::wxWizardPage(wxWizard *parent,
                           const wxBitmap& bitmap,
                           const wxChar *resource)
{
    Create(parent, bitmap, resource);
}

bool wxWizardPage::Create(wxWizard *parent,
                          const wxBitmap& bitmap,
                          const wxChar *resource)
{
    if ( !wxPanel::Create(parent, wxID_ANY) )
        return false;

    if ( resource != NULL )
    {
#if wxUSE_WX_RESOURCES
#if 0
       if ( !LoadFromResource(this, resource) )
        {
            wxFAIL_MSG(wxT("wxWizardPage LoadFromResource failed!!!!"));
        }
#endif
#endif // wxUSE_RESOURCES
    }

    m_bitmap = bitmap;

    // initially the page is hidden, it's shown only when it becomes current
    Hide();

    return true;
}

// ----------------------------------------------------------------------------
// wxWizardPageSimple
// ----------------------------------------------------------------------------

wxWizardPage *wxWizardPageSimple::GetPrev() const
{
    return m_prev;
}

wxWizardPage *wxWizardPageSimple::GetNext() const
{
    return m_next;
}

// ----------------------------------------------------------------------------
// wxWizardSizer
// ----------------------------------------------------------------------------

wxWizardSizer::wxWizardSizer(wxWizard *owner)
    : m_owner(owner)
{
    m_childSizeValid = false;
}

void wxWizardSizer::RecalcSizes()
{
    // Effect of this function depends on m_owner->m_page and
    // it should be called whenever it changes (wxWizard::ShowPage)
    if ( m_owner->m_page )
    {
        m_owner->m_page->SetSize(m_position.x,m_position.y, m_size.x,m_size.y);
    }
}

wxSize wxWizardSizer::CalcMin()
{
    return m_owner->GetPageSize();
}

wxSize wxWizardSizer::GetMaxChildSize()
{
#if !defined(__WXDEBUG__)
    if ( m_childSizeValid )
        return m_childSize;
#endif

    wxSize maxOfMin;
    wxSizerItemList::compatibility_iterator childNode;

    for(childNode = m_children.GetFirst(); childNode;
        childNode = childNode->GetNext())
    {
        wxSizerItem *child = childNode->GetData();
        maxOfMin.IncTo(child->CalcMin());
        maxOfMin.IncTo(SiblingSize(child));
    }

#ifdef __WXDEBUG__
    if ( m_childSizeValid && m_childSize != maxOfMin )
    {
        wxFAIL_MSG( _T("Size changed in wxWizard::GetPageAreaSizer()")
                    _T("after RunWizard().\n")
                    _T("Did you forget to call GetSizer()->Fit(this) ")
                    _T("for some page?")) ;

        return m_childSize;
    }
#endif // __WXDEBUG__

    if ( m_owner->m_started )
    {
        m_childSizeValid = true;
        m_childSize = maxOfMin;
    }

    return maxOfMin;
}

int wxWizardSizer::Border() const
{
    if ( m_owner->m_calledSetBorder )
        return m_owner->m_border;

    return m_children.IsEmpty() ? 5 : 0;
}

wxSize wxWizardSizer::SiblingSize(wxSizerItem *child)
{
    wxSize maxSibling;

    if ( child->IsWindow() )
    {
        wxWizardPage *page = wxDynamicCast(child->GetWindow(), wxWizardPage);
        if ( page )
        {
            for ( wxWizardPage *sibling = page->GetNext();
                  sibling;
                  sibling = sibling->GetNext() )
            {
                if ( sibling->GetSizer() )
                {
                    maxSibling.IncTo(sibling->GetSizer()->CalcMin());
                }
            }
        }
    }

    return maxSibling;
}

// ----------------------------------------------------------------------------
// generic wxWizard implementation
// ----------------------------------------------------------------------------

#if wxCHECK_VERSION(2, 7, 0)
    #error "Fix wxGTK vs. wxMSW difference other way"
#else
    WX_DEFINE_ARRAY_PTR(wxWizard *, wxModelessWizards);
    wxModelessWizards modelessWizards;
#endif

void wxWizard::Init()
{
    m_posWizard = wxDefaultPosition;
    m_page = (wxWizardPage *)NULL;
    m_btnPrev = m_btnNext = NULL;
    m_statbmp = NULL;
    m_sizerBmpAndPage = NULL;
    m_sizerPage = NULL;
    m_calledSetBorder = false;
    m_border = 0;
    m_started = false;
    modelessWizards.Add(this);
}

bool wxWizard::Create(wxWindow *parent,
                      int id,
                      const wxString& title,
                      const wxBitmap& bitmap,
                      const wxPoint& pos,
                      long style)
{
    bool result = wxDialog::Create(parent,id,title,pos,wxDefaultSize,style);

    m_posWizard = pos;
    m_bitmap = bitmap ;

    DoCreateControls();

    return result;
}

void wxWizard::AddBitmapRow(wxBoxSizer *mainColumn)
{
    m_sizerBmpAndPage = new wxBoxSizer(wxHORIZONTAL);
    mainColumn->Add(
        m_sizerBmpAndPage,
        1, // Vertically stretchable
        wxEXPAND // Horizonal stretching, no border
    );
    mainColumn->Add(0,5,
        0, // No vertical stretching
        wxEXPAND // No border, (mostly useless) horizontal stretching
    );

#if wxUSE_STATBMP
    if ( m_bitmap.Ok() )
    {
        m_statbmp = new wxStaticBitmap(this, wxID_ANY, m_bitmap);
        m_sizerBmpAndPage->Add(
            m_statbmp,
            0, // No horizontal stretching
            wxALL, // Border all around, top alignment
            5 // Border width
        );
        m_sizerBmpAndPage->Add(
            5,0,
            0, // No horizontal stretching
            wxEXPAND // No border, (mostly useless) vertical stretching
        );
    }
#endif

    // Added to m_sizerBmpAndPage in FinishLayout
    m_sizerPage = new wxWizardSizer(this);
}

void wxWizard::AddStaticLine(wxBoxSizer *mainColumn)
{
#if wxUSE_STATLINE
    mainColumn->Add(
        new wxStaticLine(this, wxID_ANY),
        0, // Vertically unstretchable
        wxEXPAND | wxALL, // Border all around, horizontally stretchable
        5 // Border width
    );
    mainColumn->Add(0,5,
        0, // No vertical stretching
        wxEXPAND // No border, (mostly useless) horizontal stretching
    );
#else
    (void)mainColumn;
#endif // wxUSE_STATLINE
}

void wxWizard::AddBackNextPair(wxBoxSizer *buttonRow)
{
    wxASSERT_MSG( m_btnNext && m_btnPrev,
                  _T("You must create the buttons before calling ")
                  _T("wxWizard::AddBackNextPair") );

    // margin between Back and Next buttons
#ifdef __WXMAC__
    static const int BACKNEXT_MARGIN = 10;
#else
    static const int BACKNEXT_MARGIN = 0;
#endif

    wxBoxSizer *backNextPair = new wxBoxSizer(wxHORIZONTAL);
    buttonRow->Add(
        backNextPair,
        0, // No horizontal stretching
        wxALL, // Border all around
        5 // Border width
    );

    backNextPair->Add(m_btnPrev);
    backNextPair->Add(BACKNEXT_MARGIN,0,
        0, // No horizontal stretching
        wxEXPAND // No border, (mostly useless) vertical stretching
    );
    backNextPair->Add(m_btnNext);
}

void wxWizard::AddButtonRow(wxBoxSizer *mainColumn)
{
    // the order in which the buttons are created determines the TAB order - at least under MSWindows...
    // although the 'back' button appears before the 'next' button, a more userfriendly tab order is
    // to activate the 'next' button first (create the next button before the back button).
    // The reason is: The user will repeatedly enter information in the wizard pages and then wants to
    // press 'next'. If a user uses mostly the keyboard, he would have to skip the 'back' button
    // everytime. This is annoying. There is a second reason: RETURN acts as TAB. If the 'next'
    // button comes first in the TAB order, the user can enter information very fast using the RETURN
    // key to TAB to the next entry field and page. This would not be possible, if the 'back' button
    // was created before the 'next' button.

    bool isPda = (wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA);
    int buttonStyle = isPda ? wxBU_EXACTFIT : 0;    

    wxBoxSizer *buttonRow = new wxBoxSizer(wxHORIZONTAL);
#ifdef __WXMAC__
    if (GetExtraStyle() & wxWIZARD_EX_HELPBUTTON)
        mainColumn->Add(
            buttonRow,
            0, // Vertically unstretchable
            wxGROW|wxALIGN_CENTRE
            );
    else
#endif
    mainColumn->Add(
        buttonRow,
        0, // Vertically unstretchable
        wxALIGN_RIGHT // Right aligned, no border
    );

    // Desired TAB order is 'next', 'cancel', 'help', 'back'. This makes the 'back' button the last control on the page.
    // Create the buttons in the right order...
    wxButton *btnHelp=0;
#ifdef __WXMAC__
    if (GetExtraStyle() & wxWIZARD_EX_HELPBUTTON)
        btnHelp=new wxButton(this, wxID_HELP, _("&Help"), wxDefaultPosition, wxDefaultSize, buttonStyle);
#endif

    m_btnNext = new wxButton(this, wxID_FORWARD, _("&Next >"));
    wxButton *btnCancel=new wxButton(this, wxID_CANCEL, _("&Cancel"), wxDefaultPosition, wxDefaultSize, buttonStyle);