gbsizer.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        gbsizer.cpp
// Purpose:     wxGridBagSizer:  A sizer that can lay out items in a grid,
//              with items at specified cells, and with the option of row
//              and/or column spanning
//
// Author:      Robin Dunn
// Created:     03-Nov-2003
// RCS-ID:      $Id: gbsizer.cpp,v 1.12 2004/11/09 18:33:00 ABX Exp $
// Copyright:   (c) Robin Dunn
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////


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

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#include "wx/gbsizer.h"

//---------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxGBSizerItem, wxSizerItem)
IMPLEMENT_CLASS(wxGridBagSizer, wxFlexGridSizer)

const wxGBSpan wxDefaultSpan;

//---------------------------------------------------------------------------
// wxGBSizerItem
//---------------------------------------------------------------------------

wxGBSizerItem::wxGBSizerItem( int width,
                              int height,
                              const wxGBPosition& pos,
                              const wxGBSpan& span,
                              int flag,
                              int border,
                              wxObject* userData)
    : wxSizerItem(width, height, 0, flag, border, userData),
      m_pos(pos),
      m_span(span),
      m_gbsizer(NULL)
{
}


wxGBSizerItem::wxGBSizerItem( wxWindow *window,
                              const wxGBPosition& pos,
                              const wxGBSpan& span,
                              int flag,
                              int border,
                              wxObject* userData )
    : wxSizerItem(window, 0, flag, border, userData),
      m_pos(pos),
      m_span(span),
      m_gbsizer(NULL)
{
}


wxGBSizerItem::wxGBSizerItem( wxSizer *sizer,
                              const wxGBPosition& pos,
                              const wxGBSpan& span,
                              int flag,
                              int border,
                              wxObject* userData )
    : wxSizerItem(sizer, 0, flag, border, userData),
      m_pos(pos),
      m_span(span),
      m_gbsizer(NULL)
{
}

wxGBSizerItem::wxGBSizerItem()
    : wxSizerItem(),
      m_pos(-1,-1),
      m_span(-1,-1),
      m_gbsizer(NULL)
{
}

//---------------------------------------------------------------------------


void wxGBSizerItem::GetPos(int& row, int& col) const
{
    row = m_pos.GetRow();
    col = m_pos.GetCol();
}

void wxGBSizerItem::GetSpan(int& rowspan, int& colspan) const
{
    rowspan = m_span.GetRowspan();
    colspan = m_span.GetColspan();
}


bool wxGBSizerItem::SetPos( const wxGBPosition& pos )
{
    if (m_gbsizer)
    {
        wxCHECK_MSG( !m_gbsizer->CheckForIntersection(pos, m_span, this), false,
                 wxT("An item is already at that position") );
    }
    m_pos = pos;
    return true;
}

bool wxGBSizerItem::SetSpan( const wxGBSpan& span )
{
    if (m_gbsizer)
    {
        wxCHECK_MSG( !m_gbsizer->CheckForIntersection(m_pos, span, this), false,
                 wxT("An item is already at that position") );
    }
    m_span = span;
    return true;
}


inline bool InRange(int val, int min, int max)
{
    return (val >= min && val <= max);
}

bool wxGBSizerItem::Intersects(const wxGBSizerItem& other)
{
    return Intersects(other.GetPos(), other.GetSpan());
}

bool wxGBSizerItem::Intersects(const wxGBPosition& pos, const wxGBSpan& span)
{

    int row, col, endrow, endcol;
    int otherrow, othercol, otherendrow, otherendcol;

    GetPos(row, col);
    GetEndPos(endrow, endcol);

    otherrow = pos.GetRow();
    othercol = pos.GetCol();
    otherendrow = otherrow + span.GetRowspan() - 1;
    otherendcol = othercol + span.GetColspan() - 1;

    // is the other item's start or end in the range of this one?
    if (( InRange(otherrow, row, endrow) && InRange(othercol, col, endcol) ) ||
        ( InRange(otherendrow, row, endrow) && InRange(otherendcol, col, endcol) ))
        return true;

    // is this item's start or end in the range of the other one?
    if (( InRange(row, otherrow, otherendrow) && InRange(col, othercol, otherendcol) ) ||
        ( InRange(endrow, otherrow, otherendrow) && InRange(endcol, othercol, otherendcol) ))
        return true;

    return false;
}


void wxGBSizerItem::GetEndPos(int& row, int& col)
{
    row = m_pos.GetRow() + m_span.GetRowspan() - 1;
    col = m_pos.GetCol() + m_span.GetColspan() - 1;
}


//---------------------------------------------------------------------------
// wxGridBagSizer
//---------------------------------------------------------------------------

wxGridBagSizer::wxGridBagSizer(int vgap, int hgap )
    : wxFlexGridSizer(1, vgap, hgap),
      m_emptyCellSize(10,20)

{
}


wxSizerItem* wxGridBagSizer::Add( wxWindow *window,
                                  const wxGBPosition& pos, const wxGBSpan& span,
                                  int flag, int border,  wxObject* userData )
{
    wxGBSizerItem* item = new wxGBSizerItem(window, pos, span, flag, border, userData);
    if ( Add(item) )
        return item;
    else
    {
        delete item;
        return (wxSizerItem*)NULL;
    }
}

wxSizerItem* wxGridBagSizer::Add( wxSizer *sizer,
                          const wxGBPosition& pos, const wxGBSpan& span,
                          int flag, int border,  wxObject* userData )
{
    wxGBSizerItem* item = new wxGBSizerItem(sizer, pos, span, flag, border, userData);
    if ( Add(item) )
        return item;
    else
    {
        delete item;
        return (wxSizerItem*)NULL;
    }
}

wxSizerItem* wxGridBagSizer::Add( int width, int height,
                          const wxGBPosition& pos, const wxGBSpan& span,
                          int flag, int border,  wxObject* userData )
{
    wxGBSizerItem* item = new wxGBSizerItem(width, height, pos, span, flag, border, userData);
    if ( Add(item) )
        return item;
    else
    {
        delete item;
        return (wxSizerItem*)NULL;
    }
}

wxSizerItem* wxGridBagSizer::Add( wxGBSizerItem *item )
{
    wxCHECK_MSG( !CheckForIntersection(item), NULL,
                 wxT("An item is already at that position") );
    m_children.Append(item);
    item->SetGBSizer(this);
    if ( item->GetWindow() )
        item->GetWindow()->SetContainingSizer( this );

    return item;
}



//---------------------------------------------------------------------------

wxSize wxGridBagSizer::GetCellSize(int row, int col) const
{
    wxCHECK_MSG( (row < m_rows) && (col < m_cols),
                 wxDefaultSize,
                 wxT("Invalid cell."));
    return wxSize( m_colWidths[col], m_rowHeights[row] );
}


wxGBPosition wxGridBagSizer::GetItemPosition(wxWindow *window)
{
    wxGBPosition badpos(-1,-1);
    wxGBSizerItem* item = FindItem(window);
    wxCHECK_MSG(item, badpos, wxT("Failed to find item."));
    return item->GetPos();
}


wxGBPosition wxGridBagSizer::GetItemPosition(wxSizer *sizer)
{
    wxGBPosition badpos(-1,-1);
    wxGBSizerItem* item = FindItem(sizer);
    wxCHECK_MSG(item, badpos, wxT("Failed to find item."));
    return item->GetPos();
}


wxGBPosition wxGridBagSizer::GetItemPosition(size_t index)
{
    wxGBPosition badpos(-1,-1);
    wxSizerItemList::compatibility_iterator node = m_children.Item( index );
    wxCHECK_MSG( node, badpos, _T("Failed to find item.") );
    wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
    return item->GetPos();
}



bool wxGridBagSizer::SetItemPosition(wxWindow *window, const wxGBPosition& pos)
{
    wxGBSizerItem* item = FindItem(window);
    wxCHECK_MSG(item, false, wxT("Failed to find item."));
    return item->SetPos(pos);
}


bool wxGridBagSizer::SetItemPosition(wxSizer *sizer, const wxGBPosition& pos)
{
    wxGBSizerItem* item = FindItem(sizer);
    wxCHECK_MSG(item, false, wxT("Failed to find item."));
    return item->SetPos(pos);
}


bool wxGridBagSizer::SetItemPosition(size_t index, const wxGBPosition& pos)
{
    wxSizerItemList::compatibility_iterator node = m_children.Item( index );
    wxCHECK_MSG( node, false, _T("Failed to find item.") );
    wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
    return item->SetPos(pos);
}



wxGBSpan wxGridBagSizer::GetItemSpan(wxWindow *window)
{
    wxGBSpan badspan(-1,-1);
    wxGBSizerItem* item = FindItem(window);
    wxCHECK_MSG( item, badspan, _T("Failed to find item.") );
    return item->GetSpan();
}


wxGBSpan wxGridBagSizer::GetItemSpan(wxSizer *sizer)
{
    wxGBSpan badspan(-1,-1);
    wxGBSizerItem* item = FindItem(sizer);
    wxCHECK_MSG( item, badspan, _T("Failed to find item.") );
    return item->GetSpan();
}


wxGBSpan wxGridBagSizer::GetItemSpan(size_t index)
{
    wxGBSpan badspan(-1,-1);
    wxSizerItemList::compatibility_iterator node = m_children.Item( index );
    wxCHECK_MSG( node, badspan, _T("Failed to find item.") );
    wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
    return item->GetSpan();
}



bool wxGridBagSizer::SetItemSpan(wxWindow *window, const wxGBSpan& span)
{
    wxGBSizerItem* item = FindItem(window);
    wxCHECK_MSG(item, false, wxT("Failed to find item."));
    return item->SetSpan(span);
}


bool wxGridBagSizer::SetItemSpan(wxSizer *sizer, const wxGBSpan& span)
{
    wxGBSizerItem* item = FindItem(sizer);
    wxCHECK_MSG(item, false, wxT("Failed to find item."));
    return item->SetSpan(span);