Import LinuxCNC source tree

configs/apps/gladevcp/templates/classhandler_persistent.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+# vim: sts=4 sw=4 et
+#    This is a component of LinuxCNC
+#    classhandler_persistent.py  Copyright 2010 Michael Haberler
+#
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+'''
+    example gladevcp handler class with widget and attribute persistence support
+'''
+
+from gladevcp.persistence import IniFile,widget_defaults,set_debug,select_widgets
+
+debug = 0
+
+class HandlerClass:
+
+    def on_button_press(self,widget,data=None):
+        print("on_button_press")
+        self.anint += 1
+        # show retained attributes as inifile and current values
+        print("attr\tini\tcurrent")
+        for k in list(self.defaults[IniFile.vars].keys()):
+            print("%s\t%s\t%s" % (k,self.defaults[IniFile.vars][k],getattr(self,k,None)))
+
+    def on_destroy(self,obj,data=None):
+        '''
+        save state on application exit
+        '''
+        print("on_destroy() - saving state")
+        self.ini.save_state(self)
+
+    def on_restore_defaults(self,button,data=None):
+        '''
+        example callback for 'Reset to defaults' button (unused)
+        '''
+        print("on_restore_defaults() - setting default state")
+        self.ini.create_default_ini()
+        self.ini.restore_state(self)
+
+
+    def __init__(self, halcomp,builder,useropts):
+        self.halcomp = halcomp
+        self.builder = builder
+        self.useropts = useropts
+
+        # use the module basename for the ini file:
+        self.ini_filename = __name__ + '.save'
+
+        # choose widgets and attributes to be retained here:
+
+        # this descriptor will not retain any attrbuts,
+        # but the state of all widgets (HAL widgets and Gtk widgets
+        # (subject to widget types supported by gladevcp.persistence.accessors())
+        #self.defaults = {   IniFile.vars: dict(),
+        #                    IniFile.widgets : widget_defaults(<widgetlist>)
+        #                }
+
+        # this descriptor will retain the listed attributes, and only
+        # HAL widgets state:
+        self.defaults = {   IniFile.vars: { 'afloat' : 1.67, 'anint' : 42, 'abool' : True, 'astring': 'sometext' },
+                            IniFile.widgets : widget_defaults(select_widgets(self.builder.get_objects(), hal_only=False,output_only = False))
+                        }
+
+        self.ini = IniFile(self.ini_filename,self.defaults, self.builder)
+
+        # it is OK to use self.panel.widgets (all widgets) here because only
+        # widgets whose state was saved as per descriptor will be restored
+        self.ini.restore_state(self)
+
+
+def get_handlers(halcomp,builder,useropts):
+
+    global debug
+    for cmd in useropts:
+        exec(cmd, globals())
+
+    # get some detail what save/restore etc are doing
+    set_debug(debug)
+
+    return [HandlerClass(halcomp,builder,useropts)]