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[wxWidgets.git] / src / common / artprov.cpp
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1/////////////////////////////////////////////////////////////////////////////
2// Name: artprov.cpp
3// Purpose: wxArtProvider class
4// Author: Vaclav Slavik
5// Modified by:
6// Created: 18/03/2002
7// RCS-ID: $Id$
8// Copyright: (c) Vaclav Slavik
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12// ---------------------------------------------------------------------------
13// headers
14// ---------------------------------------------------------------------------
15
16#ifdef __GNUG__
17 #pragma implementation "artprov.h"
18#endif
19
20// For compilers that support precompilation, includes "wx.h".
21#include "wx/wxprec.h"
22
23#if defined(__BORLANDC__)
24 #pragma hdrstop
25#endif
26
27#ifndef WX_PRECOMP
28 #include "wx/log.h"
29 #include "wx/list.h"
30#endif
31
32#include "wx/artprov.h"
33#include "wx/hashmap.h"
34#include "wx/module.h"
35
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36// For the purposes of forcing this module to link
37extern char g_ArtProviderModule;
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38
39// ===========================================================================
40// implementation
41// ===========================================================================
42
43#include "wx/listimpl.cpp"
44WX_DECLARE_LIST(wxArtProvider, wxArtProvidersList);
45WX_DEFINE_LIST(wxArtProvidersList);
46
47// ----------------------------------------------------------------------------
48// Cache class - stores already requested bitmaps
49// ----------------------------------------------------------------------------
50
51WX_DECLARE_STRING_HASH_MAP(wxBitmap, wxArtProviderBitmapsHash);
52
53class WXDLLEXPORT wxArtProviderCache
54{
55public:
56 bool GetBitmap(const wxString& full_id, wxBitmap* bmp);
57 void PutBitmap(const wxString& full_id, const wxBitmap& bmp)
58 { m_bitmapsHash[full_id] = bmp; }
59
60 void Clear();
61
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62 static wxString ConstructHashID(const wxArtID& id,
63 const wxArtClient& client,
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64 const wxSize& size);
65
66private:
67 wxArtProviderBitmapsHash m_bitmapsHash;
68};
69
70bool wxArtProviderCache::GetBitmap(const wxString& full_id, wxBitmap* bmp)
71{
72 wxArtProviderBitmapsHash::iterator entry = m_bitmapsHash.find(full_id);
73 if ( entry == m_bitmapsHash.end() )
74 {
75 return FALSE;
76 }
77 else
78 {
79 *bmp = entry->second;
80 return TRUE;
81 }
82}
83
84void wxArtProviderCache::Clear()
85{
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86 // Hack to make the default provider link
87 // with the application
88 g_ArtProviderModule = 0;
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89 m_bitmapsHash.clear();
90}
91
92/*static*/ wxString wxArtProviderCache::ConstructHashID(
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93 const wxArtID& id, const wxArtClient& client,
94 const wxSize& size)
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95{
96 wxString str;
57b0987b 97 str.Printf(wxT("%s-%s-%i-%i"), id.c_str(), client.c_str(), size.x, size.y);
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98 return str;
99}
100
101
102// ----------------------------------------------------------------------------
103// wxArtProvider class
104// ----------------------------------------------------------------------------
105
106IMPLEMENT_ABSTRACT_CLASS(wxArtProvider, wxObject)
107
108wxArtProvidersList *wxArtProvider::sm_providers = NULL;
109wxArtProviderCache *wxArtProvider::sm_cache = NULL;
110
111/*static*/ void wxArtProvider::PushProvider(wxArtProvider *provider)
112{
113 if ( !sm_providers )
114 {
115 sm_providers = new wxArtProvidersList;
116 sm_providers->DeleteContents(TRUE);
117 sm_cache = new wxArtProviderCache;
118 }
119
120 sm_providers->Insert(provider);
121}
122
123/*static*/ bool wxArtProvider::PopProvider()
124{
125 wxCHECK_MSG( sm_providers, FALSE, _T("no wxArtProvider exists") );
126 wxCHECK_MSG( sm_providers->GetCount() > 0, FALSE, _T("wxArtProviders stack is empty") );
127
128 sm_providers->DeleteNode(sm_providers->GetFirst());
129 sm_cache->Clear();
130 return TRUE;
131}
132
133/*static*/ bool wxArtProvider::RemoveProvider(wxArtProvider *provider)
134{
135 wxCHECK_MSG( sm_providers, FALSE, _T("no wxArtProvider exists") );
136
137 if ( sm_providers->DeleteObject(provider) )
138 {
139 sm_cache->Clear();
140 return TRUE;
141 }
142
143 return FALSE;
144}
145
146/*static*/ void wxArtProvider::CleanUpProviders()
147{
148 wxDELETE(sm_providers);
149 wxDELETE(sm_cache);
150}
151
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152/*static*/ wxBitmap wxArtProvider::GetBitmap(const wxArtID& id,
153 const wxArtClient& client,
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154 const wxSize& size)
155{
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156 // safety-check against writing client,id,size instead of id,client,size:
157 wxASSERT_MSG( client.Last() == _T('C'), _T("invalid 'client' parameter") );
158
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159 wxCHECK_MSG( sm_providers, wxNullBitmap, _T("no wxArtProvider exists") );
160
57b0987b 161 wxString hashId = wxArtProviderCache::ConstructHashID(id, client, size);
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162
163 wxBitmap bmp;
164 if ( !sm_cache->GetBitmap(hashId, &bmp) )
165 {
166 for (wxArtProvidersList::Node *node = sm_providers->GetFirst();
167 node; node = node->GetNext())
168 {
57b0987b 169 bmp = node->GetData()->CreateBitmap(id, client, size);
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170 if ( bmp.Ok() )
171 break;
172 }
173 sm_cache->PutBitmap(hashId, bmp);
174 }
175
176 return bmp;
177}
178
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179/*static*/ wxIcon wxArtProvider::GetIcon(const wxArtID& id,
180 const wxArtClient& client,
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181 const wxSize& size)
182{
183 wxCHECK_MSG( sm_providers, wxNullIcon, _T("no wxArtProvider exists") );
184
57b0987b 185 wxBitmap bmp = GetBitmap(id, client, size);
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186 if ( bmp.Ok() )
187 {
188 wxIcon icon;
189 icon.CopyFromBitmap(bmp);
190 return icon;
191 }
192 else
193 {
194 return wxNullIcon;
195 }
196}
197
198
199
200class wxArtProviderModule: public wxModule
201{
202public:
203 bool OnInit() { return TRUE; }
204 void OnExit() { wxArtProvider::CleanUpProviders(); }
205
206 DECLARE_DYNAMIC_CLASS(wxArtProviderModule)
207};
208
209IMPLEMENT_DYNAMIC_CLASS(wxArtProviderModule, wxModule)