From 7bebedd82651a0fc6cf002497956c467375362f7 Mon Sep 17 00:00:00 2001
From: =?utf8?q?V=C3=A1clav=20Slav=C3=ADk?= <vslavik@fastmail.fm>
Date: Sun, 22 Aug 2004 19:23:53 +0000
Subject: [PATCH] added GTK2 implementation of wxArtProvider

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28861 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 Makefile.in               |  16 +++
 build/bakefiles/files.bkl |   1 +
 docs/changes.txt          |   1 +
 docs/latex/wx/artprov.tex |   4 +
 src/common/artprov.cpp    |   1 +
 src/gtk/artgtk.cpp        | 218 ++++++++++++++++++++++++++++++++++++++
 src/gtk1/artgtk.cpp       | 218 ++++++++++++++++++++++++++++++++++++++
 7 files changed, 459 insertions(+)
 create mode 100644 src/gtk/artgtk.cpp
 create mode 100644 src/gtk1/artgtk.cpp

diff --git a/Makefile.in b/Makefile.in
index de957ddfc9..76515f9a6c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -2676,6 +2676,7 @@ COND_TOOLKIT_GTK___GUI_SRC_OBJECTS =  \
 	monodll_statusbr.o \
 	monodll_tabg.o \
 	monodll_fontdlgg.o \
+	monodll_artgtk.o \
 	monodll_bmpbuttn.o \
 	monodll_button.o \
 	monodll_checkbox.o \
@@ -3554,6 +3555,7 @@ COND_TOOLKIT_GTK___GUI_SRC_OBJECTS_1 =  \
 	monolib_statusbr.o \
 	monolib_tabg.o \
 	monolib_fontdlgg.o \
+	monolib_artgtk.o \
 	monolib_bmpbuttn.o \
 	monolib_button.o \
 	monolib_checkbox.o \
@@ -4618,6 +4620,7 @@ COND_TOOLKIT_GTK___GUI_SRC_OBJECTS_2 =  \
 	coredll_statusbr.o \
 	coredll_tabg.o \
 	coredll_fontdlgg.o \
+	coredll_artgtk.o \
 	coredll_bmpbuttn.o \
 	coredll_button.o \
 	coredll_checkbox.o \
@@ -5349,6 +5352,7 @@ COND_TOOLKIT_GTK___GUI_SRC_OBJECTS_3 =  \
 	corelib_statusbr.o \
 	corelib_tabg.o \
 	corelib_fontdlgg.o \
+	corelib_artgtk.o \
 	corelib_bmpbuttn.o \
 	corelib_button.o \
 	corelib_checkbox.o \
@@ -8150,6 +8154,9 @@ monodll_urlmsw.o: $(srcdir)/src/msw/urlmsw.cpp $(MONODLL_ODEP)
 monodll_net.o: $(srcdir)/src/msw/wince/net.cpp $(MONODLL_ODEP)
 	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
+monodll_artgtk.o: $(srcdir)/src/gtk/artgtk.cpp $(MONODLL_ODEP)
+	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
+
 monodll_scrolwin.o: $(srcdir)/src/gtk/scrolwin.cpp $(MONODLL_ODEP)
 	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
@@ -11135,6 +11142,9 @@ monolib_urlmsw.o: $(srcdir)/src/msw/urlmsw.cpp $(MONOLIB_ODEP)
 monolib_net.o: $(srcdir)/src/msw/wince/net.cpp $(MONOLIB_ODEP)
 	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
+monolib_artgtk.o: $(srcdir)/src/gtk/artgtk.cpp $(MONOLIB_ODEP)
+	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
+
 monolib_scrolwin.o: $(srcdir)/src/gtk/scrolwin.cpp $(MONOLIB_ODEP)
 	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
@@ -14666,6 +14676,9 @@ coredll_volume.o: $(srcdir)/src/msw/volume.cpp $(COREDLL_ODEP)
 coredll_uma.o: $(srcdir)/src/mac/carbon/uma.cpp $(COREDLL_ODEP)
 	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
+coredll_artgtk.o: $(srcdir)/src/gtk/artgtk.cpp $(COREDLL_ODEP)
+	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
+
 coredll_scrolwin.o: $(srcdir)/src/gtk/scrolwin.cpp $(COREDLL_ODEP)
 	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
@@ -17105,6 +17118,9 @@ corelib_volume.o: $(srcdir)/src/msw/volume.cpp $(CORELIB_ODEP)
 corelib_uma.o: $(srcdir)/src/mac/carbon/uma.cpp $(CORELIB_ODEP)
 	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
+corelib_artgtk.o: $(srcdir)/src/gtk/artgtk.cpp $(CORELIB_ODEP)
+	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
+
 corelib_scrolwin.o: $(srcdir)/src/gtk/scrolwin.cpp $(CORELIB_ODEP)
 	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index a9aba3332e..9b127643ab 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -725,6 +725,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     <!-- Generic implementations used by wxGPE: -->
     src/generic/fontdlgg.cpp
     <!-- GTK+ specific files: -->
+    src/gtk/artgtk.cpp
     src/gtk/bmpbuttn.cpp
     src/gtk/button.cpp
     src/gtk/checkbox.cpp
diff --git a/docs/changes.txt b/docs/changes.txt
index e4428d4d34..8584dde749 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -250,6 +250,7 @@ wxGTK:
   freedesktop.org's wm-spec (Mart Raudsepp)
 - wxEVT_CONTEXT_MENU is now generated for right mouse press, not release
 - implemented alpha channel support in wxBitmap
+- added native GTK+2  wxArtProvider implementation
 
 wxMotif:
 
diff --git a/docs/latex/wx/artprov.tex b/docs/latex/wx/artprov.tex
index 842f893584..6263d30628 100644
--- a/docs/latex/wx/artprov.tex
+++ b/docs/latex/wx/artprov.tex
@@ -75,6 +75,10 @@ constants in the \helpref{artprov}{sampleartprovider} sample):
 \item wxART\_MISSING\_IMAGE      
 \end{itemize}
 
+Additionally, any string recognized by custom art providers registered using
+\helpref{PushProvider}{wxartproviderpushprovider} may be used. When running
+under GTK+ 2, GTK+ stock item IDs (e.g. {\tt "gtk-cdrom"}) may be used as well.
+
 \membersection{Clients}
 
 Client is the entity that calls wxArtProvider's GetBitmap or GetIcon
diff --git a/src/common/artprov.cpp b/src/common/artprov.cpp
index bfa75a5c78..9c3fda0143 100644
--- a/src/common/artprov.cpp
+++ b/src/common/artprov.cpp
@@ -210,6 +210,7 @@ public:
     bool OnInit()
     {
         wxArtProvider::InitStdProvider();
+        wxArtProvider::InitNativeProvider();
         return TRUE;
     }
     void OnExit()
diff --git a/src/gtk/artgtk.cpp b/src/gtk/artgtk.cpp
new file mode 100644
index 0000000000..e7aaa2935d
--- /dev/null
+++ b/src/gtk/artgtk.cpp
@@ -0,0 +1,218 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        artstd.cpp
+// Purpose:     stock wxArtProvider instance with native GTK+ stock icons
+// Author:      Vaclav Slavik
+// Modified by:
+// Created:     2004-08-22
+// RCS-ID:      $Id$
+// Copyright:   (c) Vaclav Slavik, 2004
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// ---------------------------------------------------------------------------
+// headers
+// ---------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#if defined(__BORLANDC__)
+    #pragma hdrstop
+#endif
+
+#if defined(__WXGTK20__) && !defined(__WXUNIVERSAL__)
+
+#include "wx/artprov.h"
+
+#include <gtk/gtk.h>
+
+// compatibility with older GTK+ versions:
+#ifndef GTK_STOCK_FILE
+    #define GTK_STOCK_FILE "gtk-file"
+#endif
+#ifndef GTK_STOCK_DIRECTORY
+    #define GTK_STOCK_DIRECTORY "gtk-directory"
+#endif
+
+
+// ----------------------------------------------------------------------------
+// wxGTK2ArtProvider
+// ----------------------------------------------------------------------------
+
+class wxGTK2ArtProvider : public wxArtProvider
+{
+protected:
+    virtual wxBitmap CreateBitmap(const wxArtID& id, const wxArtClient& client,
+                                  const wxSize& size);
+};
+
+/*static*/ void wxArtProvider::InitNativeProvider()
+{
+    wxArtProvider::PushProvider(new wxGTK2ArtProvider);
+}
+
+// ----------------------------------------------------------------------------
+// CreateBitmap routine
+// ----------------------------------------------------------------------------
+
+static const char *wxArtIDToStock(const wxArtID& id)
+{
+    #define ART(wxid, gtkid) \
+           if (id == wxid) return gtkid;
+    
+    ART(wxART_ERROR,                               GTK_STOCK_DIALOG_ERROR)
+    ART(wxART_INFORMATION,                         GTK_STOCK_DIALOG_INFO)
+    ART(wxART_WARNING,                             GTK_STOCK_DIALOG_WARNING)
+    ART(wxART_QUESTION,                            GTK_STOCK_DIALOG_QUESTION)
+    
+    //ART(wxART_HELP_SIDE_PANEL,                     )
+    ART(wxART_HELP_SETTINGS,                       GTK_STOCK_SELECT_FONT)
+    //ART(wxART_HELP_BOOK,                           )
+    ART(wxART_HELP_FOLDER,                         GTK_STOCK_DIRECTORY)
+    ART(wxART_HELP_PAGE,                           GTK_STOCK_FILE)
+    ART(wxART_MISSING_IMAGE,                       GTK_STOCK_MISSING_IMAGE)
+    ART(wxART_ADD_BOOKMARK,                        GTK_STOCK_ADD)
+    ART(wxART_DEL_BOOKMARK,                        GTK_STOCK_REMOVE)
+    ART(wxART_GO_BACK,                             GTK_STOCK_GO_BACK)
+    ART(wxART_GO_FORWARD,                          GTK_STOCK_GO_FORWARD)
+    ART(wxART_GO_UP,                               GTK_STOCK_GO_UP)
+    ART(wxART_GO_DOWN,                             GTK_STOCK_GO_DOWN)
+    ART(wxART_GO_TO_PARENT,                        GTK_STOCK_GO_UP)
+    ART(wxART_GO_HOME,                             GTK_STOCK_HOME)
+    ART(wxART_FILE_OPEN,                           GTK_STOCK_OPEN)
+    ART(wxART_PRINT,                               GTK_STOCK_PRINT)
+    ART(wxART_HELP,                                GTK_STOCK_HELP)
+    ART(wxART_TIP,                                 GTK_STOCK_DIALOG_INFO)
+    //ART(wxART_REPORT_VIEW,                         )
+    //ART(wxART_LIST_VIEW,                           )
+    //ART(wxART_NEW_DIR,                             )
+    ART(wxART_FOLDER,                              GTK_STOCK_DIRECTORY)
+    //ART(wxART_GO_DIR_UP,                           )
+    ART(wxART_EXECUTABLE_FILE,                     GTK_STOCK_EXECUTE)
+    ART(wxART_NORMAL_FILE,                         GTK_STOCK_FILE)
+    ART(wxART_TICK_MARK,                           GTK_STOCK_APPLY)
+    ART(wxART_CROSS_MARK,                          GTK_STOCK_CANCEL)
+    
+    return NULL;
+    
+    #undef ART
+}
+
+static GtkIconSize wxArtClientToIconSize(const wxArtClient& client)
+{
+    if (client == wxART_TOOLBAR)
+        return GTK_ICON_SIZE_LARGE_TOOLBAR;
+    else if (client == wxART_MENU)
+        return GTK_ICON_SIZE_MENU;
+    else if (client == wxART_CMN_DIALOG || client == wxART_MESSAGE_BOX)
+        return GTK_ICON_SIZE_DIALOG;
+    else if (client == wxART_BUTTON)
+        return GTK_ICON_SIZE_BUTTON;
+    else
+        return GTK_ICON_SIZE_BUTTON; // this is arbitrary
+}
+
+static GtkIconSize FindClosestIconSize(const wxSize& size)
+{
+    #define NUM_SIZES 6
+    static struct
+    {
+        GtkIconSize icon;
+        gint x, y;
+    } s_sizes[NUM_SIZES];
+    static bool s_sizesInitialized = false;
+
+    if (!s_sizesInitialized)
+    {
+        s_sizes[0].icon = GTK_ICON_SIZE_MENU;
+        s_sizes[1].icon = GTK_ICON_SIZE_SMALL_TOOLBAR;
+        s_sizes[2].icon = GTK_ICON_SIZE_LARGE_TOOLBAR;
+        s_sizes[3].icon = GTK_ICON_SIZE_BUTTON;
+        s_sizes[4].icon = GTK_ICON_SIZE_DND;
+        s_sizes[5].icon = GTK_ICON_SIZE_DIALOG;
+        for (size_t i = 0; i < NUM_SIZES; i++)
+        {
+            gtk_icon_size_lookup(s_sizes[i].icon,
+                                 &s_sizes[i].x, &s_sizes[i].y);
+        }
+        s_sizesInitialized = true;
+    }
+
+    GtkIconSize best = GTK_ICON_SIZE_DIALOG; // presumably largest
+    unsigned distance = INT_MAX;
+    for (size_t i = 0; i < NUM_SIZES; i++)
+    {
+        // only use larger bitmaps, scaling down looks better than scaling up:
+        if (size.x > s_sizes[i].x || size.y > s_sizes[i].y)
+            continue;
+        
+        unsigned dist = (size.x - s_sizes[i].x) * (size.x - s_sizes[i].x) + 
+                        (size.y - s_sizes[i].y) * (size.y - s_sizes[i].y);
+        if (dist == 0)
+            return s_sizes[i].icon;
+        else if (dist < distance)
+        {
+            distance = dist;
+            best = s_sizes[i].icon;
+        }            
+    }
+    return best;
+}
+
+wxBitmap wxGTK2ArtProvider::CreateBitmap(const wxArtID& id,
+                                         const wxArtClient& client,
+                                         const wxSize& size)
+{
+    wxCharBuffer stockid = wxArtIDToStock(id);
+    GtkIconSize stocksize = (size == wxDefaultSize) ?
+                                wxArtClientToIconSize(client) : 
+                                FindClosestIconSize(size);
+
+    // allow passing GTK+ stock IDs to wxArtProvider:
+    if (!stockid)
+        stockid = id.ToAscii();
+
+    // FIXME: This code is not 100% correct, because stock pixmap are
+    //        context-dependent and may be affected by theme engine, the
+    //        correct value can only be obtained for given GtkWidget object.
+    //        
+    //        Fool-proof implementation of stock bitmaps would extend wxBitmap
+    //        with "stock-id" representation (in addition to pixmap and pixbuf
+    //        ones) and would convert it to pixbuf when rendered.
+    
+    GtkStyle *style = gtk_widget_get_default_style();
+    GtkIconSet *iconset = gtk_style_lookup_icon_set(style, stockid);
+
+    if (!iconset)
+        return wxNullBitmap;
+
+    GdkPixbuf *pixbuf = 
+        gtk_icon_set_render_icon(iconset, style,
+                                 gtk_widget_get_default_direction(),
+                                 GTK_STATE_NORMAL, stocksize, NULL, NULL);
+
+    if (pixbuf && size != wxDefaultSize &&
+        (size.x != gdk_pixbuf_get_width(pixbuf) ||
+         size.y != gdk_pixbuf_get_height(pixbuf)))
+    {
+        GdkPixbuf *p2 = gdk_pixbuf_scale_simple(pixbuf, size.x, size.y,
+                                                GDK_INTERP_BILINEAR);
+        if (p2)
+        {
+            gdk_pixbuf_unref(pixbuf);
+            pixbuf = p2;
+        }
+    }
+    
+    if (!pixbuf)
+        return wxNullBitmap;
+
+    wxBitmap bmp;
+    bmp.SetWidth(gdk_pixbuf_get_width(pixbuf));
+    bmp.SetHeight(gdk_pixbuf_get_height(pixbuf));
+    bmp.SetPixbuf(pixbuf);
+
+    return bmp;
+}
+
+#endif // defined(__WXGTK20__) && !defined(__WXUNIVERSAL__)
diff --git a/src/gtk1/artgtk.cpp b/src/gtk1/artgtk.cpp
new file mode 100644
index 0000000000..e7aaa2935d
--- /dev/null
+++ b/src/gtk1/artgtk.cpp
@@ -0,0 +1,218 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        artstd.cpp
+// Purpose:     stock wxArtProvider instance with native GTK+ stock icons
+// Author:      Vaclav Slavik
+// Modified by:
+// Created:     2004-08-22
+// RCS-ID:      $Id$
+// Copyright:   (c) Vaclav Slavik, 2004
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// ---------------------------------------------------------------------------
+// headers
+// ---------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#if defined(__BORLANDC__)
+    #pragma hdrstop
+#endif
+
+#if defined(__WXGTK20__) && !defined(__WXUNIVERSAL__)
+
+#include "wx/artprov.h"
+
+#include <gtk/gtk.h>
+
+// compatibility with older GTK+ versions:
+#ifndef GTK_STOCK_FILE
+    #define GTK_STOCK_FILE "gtk-file"
+#endif
+#ifndef GTK_STOCK_DIRECTORY
+    #define GTK_STOCK_DIRECTORY "gtk-directory"
+#endif
+
+
+// ----------------------------------------------------------------------------
+// wxGTK2ArtProvider
+// ----------------------------------------------------------------------------
+
+class wxGTK2ArtProvider : public wxArtProvider
+{
+protected:
+    virtual wxBitmap CreateBitmap(const wxArtID& id, const wxArtClient& client,
+                                  const wxSize& size);
+};
+
+/*static*/ void wxArtProvider::InitNativeProvider()
+{
+    wxArtProvider::PushProvider(new wxGTK2ArtProvider);
+}
+
+// ----------------------------------------------------------------------------
+// CreateBitmap routine
+// ----------------------------------------------------------------------------
+
+static const char *wxArtIDToStock(const wxArtID& id)
+{
+    #define ART(wxid, gtkid) \
+           if (id == wxid) return gtkid;
+    
+    ART(wxART_ERROR,                               GTK_STOCK_DIALOG_ERROR)
+    ART(wxART_INFORMATION,                         GTK_STOCK_DIALOG_INFO)
+    ART(wxART_WARNING,                             GTK_STOCK_DIALOG_WARNING)
+    ART(wxART_QUESTION,                            GTK_STOCK_DIALOG_QUESTION)
+    
+    //ART(wxART_HELP_SIDE_PANEL,                     )
+    ART(wxART_HELP_SETTINGS,                       GTK_STOCK_SELECT_FONT)
+    //ART(wxART_HELP_BOOK,                           )
+    ART(wxART_HELP_FOLDER,                         GTK_STOCK_DIRECTORY)
+    ART(wxART_HELP_PAGE,                           GTK_STOCK_FILE)
+    ART(wxART_MISSING_IMAGE,                       GTK_STOCK_MISSING_IMAGE)
+    ART(wxART_ADD_BOOKMARK,                        GTK_STOCK_ADD)
+    ART(wxART_DEL_BOOKMARK,                        GTK_STOCK_REMOVE)
+    ART(wxART_GO_BACK,                             GTK_STOCK_GO_BACK)
+    ART(wxART_GO_FORWARD,                          GTK_STOCK_GO_FORWARD)
+    ART(wxART_GO_UP,                               GTK_STOCK_GO_UP)
+    ART(wxART_GO_DOWN,                             GTK_STOCK_GO_DOWN)
+    ART(wxART_GO_TO_PARENT,                        GTK_STOCK_GO_UP)
+    ART(wxART_GO_HOME,                             GTK_STOCK_HOME)
+    ART(wxART_FILE_OPEN,                           GTK_STOCK_OPEN)
+    ART(wxART_PRINT,                               GTK_STOCK_PRINT)
+    ART(wxART_HELP,                                GTK_STOCK_HELP)
+    ART(wxART_TIP,                                 GTK_STOCK_DIALOG_INFO)
+    //ART(wxART_REPORT_VIEW,                         )
+    //ART(wxART_LIST_VIEW,                           )
+    //ART(wxART_NEW_DIR,                             )
+    ART(wxART_FOLDER,                              GTK_STOCK_DIRECTORY)
+    //ART(wxART_GO_DIR_UP,                           )
+    ART(wxART_EXECUTABLE_FILE,                     GTK_STOCK_EXECUTE)
+    ART(wxART_NORMAL_FILE,                         GTK_STOCK_FILE)
+    ART(wxART_TICK_MARK,                           GTK_STOCK_APPLY)
+    ART(wxART_CROSS_MARK,                          GTK_STOCK_CANCEL)
+    
+    return NULL;
+    
+    #undef ART
+}
+
+static GtkIconSize wxArtClientToIconSize(const wxArtClient& client)
+{
+    if (client == wxART_TOOLBAR)
+        return GTK_ICON_SIZE_LARGE_TOOLBAR;
+    else if (client == wxART_MENU)
+        return GTK_ICON_SIZE_MENU;
+    else if (client == wxART_CMN_DIALOG || client == wxART_MESSAGE_BOX)
+        return GTK_ICON_SIZE_DIALOG;
+    else if (client == wxART_BUTTON)
+        return GTK_ICON_SIZE_BUTTON;
+    else
+        return GTK_ICON_SIZE_BUTTON; // this is arbitrary
+}
+
+static GtkIconSize FindClosestIconSize(const wxSize& size)
+{
+    #define NUM_SIZES 6
+    static struct
+    {
+        GtkIconSize icon;
+        gint x, y;
+    } s_sizes[NUM_SIZES];
+    static bool s_sizesInitialized = false;
+
+    if (!s_sizesInitialized)
+    {
+        s_sizes[0].icon = GTK_ICON_SIZE_MENU;
+        s_sizes[1].icon = GTK_ICON_SIZE_SMALL_TOOLBAR;
+        s_sizes[2].icon = GTK_ICON_SIZE_LARGE_TOOLBAR;
+        s_sizes[3].icon = GTK_ICON_SIZE_BUTTON;
+        s_sizes[4].icon = GTK_ICON_SIZE_DND;
+        s_sizes[5].icon = GTK_ICON_SIZE_DIALOG;
+        for (size_t i = 0; i < NUM_SIZES; i++)
+        {
+            gtk_icon_size_lookup(s_sizes[i].icon,
+                                 &s_sizes[i].x, &s_sizes[i].y);
+        }
+        s_sizesInitialized = true;
+    }
+
+    GtkIconSize best = GTK_ICON_SIZE_DIALOG; // presumably largest
+    unsigned distance = INT_MAX;
+    for (size_t i = 0; i < NUM_SIZES; i++)
+    {
+        // only use larger bitmaps, scaling down looks better than scaling up:
+        if (size.x > s_sizes[i].x || size.y > s_sizes[i].y)
+            continue;
+        
+        unsigned dist = (size.x - s_sizes[i].x) * (size.x - s_sizes[i].x) + 
+                        (size.y - s_sizes[i].y) * (size.y - s_sizes[i].y);
+        if (dist == 0)
+            return s_sizes[i].icon;
+        else if (dist < distance)
+        {
+            distance = dist;
+            best = s_sizes[i].icon;
+        }            
+    }
+    return best;
+}
+
+wxBitmap wxGTK2ArtProvider::CreateBitmap(const wxArtID& id,
+                                         const wxArtClient& client,
+                                         const wxSize& size)
+{
+    wxCharBuffer stockid = wxArtIDToStock(id);
+    GtkIconSize stocksize = (size == wxDefaultSize) ?
+                                wxArtClientToIconSize(client) : 
+                                FindClosestIconSize(size);
+
+    // allow passing GTK+ stock IDs to wxArtProvider:
+    if (!stockid)
+        stockid = id.ToAscii();
+
+    // FIXME: This code is not 100% correct, because stock pixmap are
+    //        context-dependent and may be affected by theme engine, the
+    //        correct value can only be obtained for given GtkWidget object.
+    //        
+    //        Fool-proof implementation of stock bitmaps would extend wxBitmap
+    //        with "stock-id" representation (in addition to pixmap and pixbuf
+    //        ones) and would convert it to pixbuf when rendered.
+    
+    GtkStyle *style = gtk_widget_get_default_style();
+    GtkIconSet *iconset = gtk_style_lookup_icon_set(style, stockid);
+
+    if (!iconset)
+        return wxNullBitmap;
+
+    GdkPixbuf *pixbuf = 
+        gtk_icon_set_render_icon(iconset, style,
+                                 gtk_widget_get_default_direction(),
+                                 GTK_STATE_NORMAL, stocksize, NULL, NULL);
+
+    if (pixbuf && size != wxDefaultSize &&
+        (size.x != gdk_pixbuf_get_width(pixbuf) ||
+         size.y != gdk_pixbuf_get_height(pixbuf)))
+    {
+        GdkPixbuf *p2 = gdk_pixbuf_scale_simple(pixbuf, size.x, size.y,
+                                                GDK_INTERP_BILINEAR);
+        if (p2)
+        {
+            gdk_pixbuf_unref(pixbuf);
+            pixbuf = p2;
+        }
+    }
+    
+    if (!pixbuf)
+        return wxNullBitmap;
+
+    wxBitmap bmp;
+    bmp.SetWidth(gdk_pixbuf_get_width(pixbuf));
+    bmp.SetHeight(gdk_pixbuf_get_height(pixbuf));
+    bmp.SetPixbuf(pixbuf);
+
+    return bmp;
+}
+
+#endif // defined(__WXGTK20__) && !defined(__WXUNIVERSAL__)
-- 
2.50.0

