storing current event for dnd support, adding default data-drag image, fixes #12065

[wxWidgets.git] / src / osx / imaglist.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/osx/imaglist.cpp
// Purpose:
// Author:      Robert Roebling
// RCS_ID:      $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_IMAGLIST

#include "wx/imaglist.h"

#ifndef WX_PRECOMP
    #include "wx/dc.h"
    #include "wx/icon.h"
    #include "wx/image.h"
#endif

IMPLEMENT_DYNAMIC_CLASS(wxImageList, wxObject)


wxImageList::wxImageList( int width, int height, bool mask, int initialCount )
{
    (void)Create(width, height, mask, initialCount);
}

wxImageList::~wxImageList()
{
    (void)RemoveAll();
}

int wxImageList::GetImageCount() const
{
    return m_images.GetCount();
}

bool wxImageList::Create( int width, int height, bool WXUNUSED(mask), int WXUNUSED(initialCount) )
{
    m_width = width;
    m_height = height;

    return Create();
}

bool wxImageList::Create()
{
    return true;
}

int wxImageList::Add( const wxIcon &bitmap )
{
    wxASSERT_MSG( (bitmap.GetWidth() == m_width && bitmap.GetHeight() == m_height)
                  || (m_width == 0 && m_height == 0),
                  wxT("invalid bitmap size in wxImageList: this might work ")
                  wxT("on this platform but definitely won't under Windows.") );

    m_images.Append( new wxIcon( bitmap ) );

    if (m_width == 0 && m_height == 0)
    {
        m_width = bitmap.GetWidth();
        m_height = bitmap.GetHeight();
    }

    return m_images.GetCount() - 1;
}

int wxImageList::Add( const wxBitmap &bitmap )
{
    wxASSERT_MSG( (bitmap.GetWidth() >= m_width && bitmap.GetHeight() == m_height)
                  || (m_width == 0 && m_height == 0),
                  wxT("invalid bitmap size in wxImageList: this might work ")
                  wxT("on this platform but definitely won't under Windows.") );

    // Mimic behavior of Windows ImageList_Add that automatically breaks up the added
    // bitmap into sub-images of the correct size
    if (m_width > 0 && bitmap.GetWidth() > m_width && bitmap.GetHeight() >= m_height)
    {
        int numImages = bitmap.GetWidth() / m_width;
        for (int subIndex = 0; subIndex < numImages; subIndex++)
        {
            wxRect rect(m_width * subIndex, 0, m_width, m_height);
            wxBitmap tmpBmp = bitmap.GetSubBitmap(rect);
            m_images.Append( new wxBitmap(tmpBmp) );
        }
    }
    else
    {
        m_images.Append( new wxBitmap(bitmap) );
    }

    if (m_width == 0 && m_height == 0)
    {
        m_width = bitmap.GetWidth();
        m_height = bitmap.GetHeight();
    }

    return m_images.GetCount() - 1;
}

int wxImageList::Add( const wxBitmap& bitmap, const wxBitmap& mask )
{
    wxBitmap bmp( bitmap );
    if (mask.Ok())
        bmp.SetMask( new wxMask( mask ) );

    return Add( bmp );
}

int wxImageList::Add( const wxBitmap& bitmap, const wxColour& maskColour )
{
    wxImage img = bitmap.ConvertToImage();
    img.SetMaskColour( maskColour.Red(), maskColour.Green(), maskColour.Blue() );

    return Add( wxBitmap( img ) );
}

// Get the bitmap
wxBitmap wxImageList::GetBitmap(int index) const
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, wxNullBitmap , wxT("wrong index in image list") );

    wxObject* obj = (wxObject*) node->GetData();
    if ( obj == NULL )
        return wxNullBitmap ;
    else if ( obj->IsKindOf(CLASSINFO(wxIcon)) )
        return wxBitmap( *(static_cast<wxIcon*>(obj)) ) ;
    else
        return *(static_cast<wxBitmap*>(obj)) ;
}

// Get the icon
wxIcon wxImageList::GetIcon(int index) const
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, wxNullIcon , wxT("wrong index in image list") );

    wxObject* obj = (wxObject*) node->GetData();
    if ( obj == NULL )
        return wxNullIcon ;
    else if ( obj->IsKindOf(CLASSINFO(wxBitmap)) )
    {
        wxFAIL_MSG( wxT("cannot convert from bitmap to icon") ) ;
        return wxNullIcon ;
    }
    else
        return *(static_cast<wxIcon*>(obj)) ;
}

bool wxImageList::Replace( int index, const wxBitmap &bitmap )
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, false, wxT("wrong index in image list") );

    wxBitmap* newBitmap = new wxBitmap( bitmap );

    if (index == (int) m_images.GetCount() - 1)
    {
        delete node->GetData();

        m_images.Erase( node );
        m_images.Append( newBitmap );
    }
    else
    {
        wxList::compatibility_iterator next = node->GetNext();
        delete node->GetData();

        m_images.Erase( node );
        m_images.Insert( next, newBitmap );
    }

    return true;
}

bool wxImageList::Replace( int index, const wxIcon &bitmap )
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, false, wxT("wrong index in image list") );

    wxIcon* newBitmap = new wxIcon( bitmap );

    if (index == (int) m_images.GetCount() - 1)
    {
        delete node->GetData();
        m_images.Erase( node );
        m_images.Append( newBitmap );
    }
    else
    {
        wxList::compatibility_iterator next = node->GetNext();
        delete node->GetData();
        m_images.Erase( node );
        m_images.Insert( next, newBitmap );
    }

    return true;
}

bool wxImageList::Replace( int index, const wxBitmap &bitmap, const wxBitmap &mask )
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, false, wxT("wrong index in image list") );

    wxBitmap* newBitmap = new wxBitmap(bitmap);

    if (index == (int) m_images.GetCount() - 1)
    {
        delete node->GetData();
        m_images.Erase( node );
        m_images.Append( newBitmap );
    }
    else
    {
        wxList::compatibility_iterator next = node->GetNext();
        delete node->GetData();
        m_images.Erase( node );
        m_images.Insert( next, newBitmap );
    }

    if (mask.Ok())
        newBitmap->SetMask(new wxMask(mask));

    return true;
}

bool wxImageList::Remove( int index )
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, false, wxT("wrong index in image list") );

    delete node->GetData();
    m_images.Erase( node );

    return true;
}

bool wxImageList::RemoveAll()
{
    WX_CLEAR_LIST(wxList, m_images);
    m_images.Clear();

    return true;
}

bool wxImageList::GetSize( int index, int &width, int &height ) const
{
    width = 0;
    height = 0;

    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, false, wxT("wrong index in image list") );

    wxObject *obj = (wxObject*)node->GetData();
    if (obj->IsKindOf(CLASSINFO(wxIcon)))
    {
        wxIcon *bm = static_cast< wxIcon* >(obj ) ;
        width = bm->GetWidth();
        height = bm->GetHeight();
    }
    else
    {
        wxBitmap *bm = static_cast< wxBitmap* >(obj ) ;
        width = bm->GetWidth();
        height = bm->GetHeight();
    }

    return true;
}

bool wxImageList::Draw(
    int index, wxDC &dc, int x, int y,
    int flags, bool WXUNUSED(solidBackground) )
{
    wxList::compatibility_iterator node = m_images.Item( index );

    wxCHECK_MSG( node, false, wxT("wrong index in image list") );

    wxObject *obj = (wxObject*)node->GetData();
    if (obj->IsKindOf(CLASSINFO(wxIcon)))
    {
        wxIcon *bm = static_cast< wxIcon* >(obj ) ;
        dc.DrawIcon( *bm , x, y );
    }
    else
    {
        wxBitmap *bm = static_cast< wxBitmap* >(obj ) ;
        dc.DrawBitmap( *bm, x, y, (flags & wxIMAGELIST_DRAW_TRANSPARENT) > 0 );
    }

    return true;
}

#endif // wxUSE_IMAGLIST