Chris' wxImage::SaveFile(filename_only) patch

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14655 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -118,6 +118,7 @@ All (GUI):
 - added wxGetFontFromUser() convenience function
 - added EVT_MENU_OPEN and EVT_MENU_CLOSE events
 - added Hungarian translations (Janos Vegh)
+- added wxImage::SaveFile(filename) method (Chris Elliott)
 
 wxMSW:
 
@@ -125,7 +126,7 @@ wxMSW:
 - refresh the buttons properly when the window is resized (Hans Van Leemputten)
 - huge (40*) speed up in wxMask::Create()
 - changing wxWindows styles also changes the underlying Windows window style
-- wxTreeCtrl supports wxTR_HIDE_ROOT stle (George Policello)
+- wxTreeCtrl supports wxTR_HIDE_ROOT style (George Policello)
 - fixed flicker in wxTreeCtrl::SetItemXXX()
 - fixed redraw problems in dynamically resized wxStaticText
 - improvements to wxWindows applications behaviour when the system colours

include/wx/image.h

@@ -187,6 +187,7 @@ public:
     virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 );
 #endif
 
+    virtual bool SaveFile( const wxString& name ) const;
     virtual bool SaveFile( const wxString& name, int type ) const;
     virtual bool SaveFile( const wxString& name, const wxString& mimetype ) const;
 

samples/image/image.cpp

@@ -183,34 +183,28 @@ public:
             delete cmap;
         }
 
-        bool saved = FALSE;
-
+        bool loaded;
         wxString extension = savefilename.AfterLast('.').Lower();
 
-        if (extension == "bmp")
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_BMP);
-        else if (extension == "png")
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNG);
-        else if (extension == "pcx")
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PCX);
-        else if ((extension == "tif") || (extension == "tiff"))
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_TIF);
-        else if (extension == "jpg")
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_JPEG);
-        else if (extension == "pnm")
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNM);
-        else if (extension == "ico")
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_ICO);
-        else if (extension == "cur")
-            {
+        if (extension == "cur")
+        {
             image.Rescale(32,32);    
             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);    
             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
-            saved=image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
-            }
+            // This shows how you can save an image with explicitly
+            // specified image format:
+            loaded = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
+        }
         else 
-            wxMessageBox("Unknown file type, see options in file selector.",
-                         "Unknown file type",
+        {
+            // This one guesses image format from filename extension
+            // (it may fail if the extension is not recognized):
+            loaded = image.SaveFile(savefilename);
+        }
+        
+        if ( !loaded )
+            wxMessageBox("No handler for this file type.",
+                         "File was not saved",
                          wxOK|wxCENTRE, this);
     }
 

src/common/image.cpp

@@ -938,6 +938,24 @@ bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int
 #endif // wxUSE_STREAMS
 }
 
+
+
+bool wxImage::SaveFile( const wxString& filename ) const
+{
+    wxString ext = filename.AfterLast('.').Lower();
+    
+    wxImageHandler * pHandler = FindHandler(ext, -1);
+    if (pHandler)
+    {
+        SaveFile(filename, pHandler->GetType());
+        return TRUE;
+    }
+
+    wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
+
+    return FALSE;
+}
+
 bool wxImage::SaveFile( const wxString& filename, int type ) const
 {
 #if wxUSE_STREAMS