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artprov.cpp
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C/C++ Source or Header
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2002-04-07
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6KB
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217 lines
/////////////////////////////////////////////////////////////////////////////
// Name: artprov.cpp
// Purpose: wxArtProvider class
// Author: Vaclav Slavik
// Modified by:
// Created: 18/03/2002
// RCS-ID: $Id: artprov.cpp,v 1.7 2002/04/06 15:01:49 VS Exp $
// Copyright: (c) Vaclav Slavik
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ---------------------------------------------------------------------------
// headers
// ---------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "artprov.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if defined(__BORLANDC__)
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/log.h"
#include "wx/list.h"
#endif
#include "wx/artprov.h"
#include "wx/hashmap.h"
#include "wx/module.h"
#include "wx/image.h"
// For the purposes of forcing this module to link
extern char g_ArtProviderModule;
// ===========================================================================
// implementation
// ===========================================================================
#include "wx/listimpl.cpp"
WX_DECLARE_LIST(wxArtProvider, wxArtProvidersList);
WX_DEFINE_LIST(wxArtProvidersList);
// ----------------------------------------------------------------------------
// Cache class - stores already requested bitmaps
// ----------------------------------------------------------------------------
WX_DECLARE_EXPORTED_STRING_HASH_MAP(wxBitmap, wxArtProviderBitmapsHash);
class WXDLLEXPORT wxArtProviderCache
{
public:
bool GetBitmap(const wxString& full_id, wxBitmap* bmp);
void PutBitmap(const wxString& full_id, const wxBitmap& bmp)
{ m_bitmapsHash[full_id] = bmp; }
void Clear();
static wxString ConstructHashID(const wxArtID& id,
const wxArtClient& client,
const wxSize& size);
private:
wxArtProviderBitmapsHash m_bitmapsHash;
};
bool wxArtProviderCache::GetBitmap(const wxString& full_id, wxBitmap* bmp)
{
wxArtProviderBitmapsHash::iterator entry = m_bitmapsHash.find(full_id);
if ( entry == m_bitmapsHash.end() )
{
return FALSE;
}
else
{
*bmp = entry->second;
return TRUE;
}
}
void wxArtProviderCache::Clear()
{
// Hack to make the default provider link
// with the application
g_ArtProviderModule = 0;
m_bitmapsHash.clear();
}
/*static*/ wxString wxArtProviderCache::ConstructHashID(
const wxArtID& id, const wxArtClient& client,
const wxSize& size)
{
wxString str;
str.Printf(wxT("%s-%s-%i-%i"), id.c_str(), client.c_str(), size.x, size.y);
return str;
}
// ----------------------------------------------------------------------------
// wxArtProvider class
// ----------------------------------------------------------------------------
IMPLEMENT_ABSTRACT_CLASS(wxArtProvider, wxObject)
wxArtProvidersList *wxArtProvider::sm_providers = NULL;
wxArtProviderCache *wxArtProvider::sm_cache = NULL;
/*static*/ void wxArtProvider::PushProvider(wxArtProvider *provider)
{
if ( !sm_providers )
{
sm_providers = new wxArtProvidersList;
sm_providers->DeleteContents(TRUE);
sm_cache = new wxArtProviderCache;
}
sm_providers->Insert(provider);
sm_cache->Clear();
}
/*static*/ bool wxArtProvider::PopProvider()
{
wxCHECK_MSG( sm_providers, FALSE, _T("no wxArtProvider exists") );
wxCHECK_MSG( sm_providers->GetCount() > 0, FALSE, _T("wxArtProviders stack is empty") );
sm_providers->DeleteNode(sm_providers->GetFirst());
sm_cache->Clear();
return TRUE;
}
/*static*/ bool wxArtProvider::RemoveProvider(wxArtProvider *provider)
{
wxCHECK_MSG( sm_providers, FALSE, _T("no wxArtProvider exists") );
if ( sm_providers->DeleteObject(provider) )
{
sm_cache->Clear();
return TRUE;
}
return FALSE;
}
/*static*/ void wxArtProvider::CleanUpProviders()
{
wxDELETE(sm_providers);
wxDELETE(sm_cache);
}
/*static*/ wxBitmap wxArtProvider::GetBitmap(const wxArtID& id,
const wxArtClient& client,
const wxSize& size)
{
// safety-check against writing client,id,size instead of id,client,size:
wxASSERT_MSG( client.Last() == _T('C'), _T("invalid 'client' parameter") );
wxCHECK_MSG( sm_providers, wxNullBitmap, _T("no wxArtProvider exists") );
wxString hashId = wxArtProviderCache::ConstructHashID(id, client, size);
wxBitmap bmp;
if ( !sm_cache->GetBitmap(hashId, &bmp) )
{
for (wxArtProvidersList::Node *node = sm_providers->GetFirst();
node; node = node->GetNext())
{
bmp = node->GetData()->CreateBitmap(id, client, size);
if ( bmp.Ok() )
{
if ( size != wxDefaultSize &&
(bmp.GetWidth() != size.x || bmp.GetHeight() != size.y) )
{
wxImage img = bmp.ConvertToImage();
img.Rescale(size.x, size.y);
bmp = wxBitmap(img);
}
break;
}
}
sm_cache->PutBitmap(hashId, bmp);
}
return bmp;
}
/*static*/ wxIcon wxArtProvider::GetIcon(const wxArtID& id,
const wxArtClient& client,
const wxSize& size)
{
wxCHECK_MSG( sm_providers, wxNullIcon, _T("no wxArtProvider exists") );
wxBitmap bmp = GetBitmap(id, client, size);
if ( !bmp.Ok() )
return wxNullIcon;
wxIcon icon;
icon.CopyFromBitmap(bmp);
return icon;
}
class wxArtProviderModule: public wxModule
{
public:
bool OnInit() { return TRUE; }
void OnExit() { wxArtProvider::CleanUpProviders(); }
DECLARE_DYNAMIC_CLASS(wxArtProviderModule)
};
IMPLEMENT_DYNAMIC_CLASS(wxArtProviderModule, wxModule)