Add atmosphere toolbar for determining the speed of sound

1 files changed, 125 insertions, 0 deletions

diff --git a/atm_toolbars.py b/atm_toolbars.py
new file mode 100644
index 0000000..169e3ee
--- /dev/null
+++ b/atm_toolbars.py
@@ -0,0 +1,125 @@
+# Copyright 2007 Benjamin M. Schwartz
+#
+# 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 St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import gtk
+import gtk.gdk
+import gobject
+import arange
+import locale
+from gettext import gettext
+
+class TempToolbar(gtk.Toolbar):
+    _speed = 0
+
+    def __init__(self):
+        gtk.Toolbar.__init__(self)
+        
+        temp_label = gtk.Label(gettext("Temperature (C): "))
+        self._temp_field = gtk.Entry()
+        self._temp_field.set_max_length(6)
+        self._temp_field.set_width_chars(6)
+        self._temp_field.connect("changed", self._update_cb)
+        
+        temp_group = gtk.HBox()
+        temp_group.pack_start(temp_label, expand=False, fill=False)
+        temp_group.pack_end(self._temp_field, expand=False,fill=False)
+        
+        humid_label = gtk.Label(gettext("Relative Humidity (%): "))
+        self._humid_field = gtk.Entry()
+        self._humid_field.set_max_length(5)
+        self._humid_field.set_width_chars(5)
+        self._humid_field.connect("changed", self._update_cb)
+        
+        humid_group = gtk.HBox()
+        humid_group.pack_start(humid_label, expand=False, fill=False)
+        humid_group.pack_end(self._humid_field, expand=False, fill=False)
+        
+        result_label = gtk.Label(gettext("Speed of Sound (m/s): "))
+        self._result = gtk.Label()
+        
+        result_group = gtk.HBox()
+        result_group.pack_start(result_label, expand=False, fill=False)
+        result_group.pack_end(self._result, expand=False, fill=False)
+        
+        bigbox = gtk.HBox()
+        
+        bigbox.pack_start(temp_group, expand=False, fill=False)
+        bigbox.pack_start(humid_group, expand=True, fill=False)
+        bigbox.pack_end(result_group, expand=False, fill=False)
+        
+        self.set_temp(25)
+        self.set_humid(60)
+        self.update_speed()
+
+        tool_item = gtk.ToolItem()
+        tool_item.add(bigbox)
+        tool_item.set_expand(True)
+        self.insert(tool_item, 0)
+        tool_item.show()
+        
+        
+    def get_temp(self):
+        try:
+            t = locale.atof(self._temp_field.get_text())
+        except:
+            t = None
+        finally:
+            return t
+        
+    def set_temp(self, t):
+        try:
+            self._temp_field.set_text(locale.str(t))
+            return True
+        except:
+            return False
+    
+    def get_humid(self):
+        try:
+            t = locale.atof(self._humid_field.get_text())
+        except:
+            t = None
+        finally:
+            return t
+        
+    def set_humid(self, h):
+        try:
+            self._humid_field.set_text(locale.str(max(0,min(100,h))))
+            return True
+        except:
+            return False
+    
+    def get_speed(self):
+        return self._speed
+        
+    def _set_speed(self, s):
+        self._speed = s
+        try:
+            self._result.set_text(locale.format('%.2f',s))
+            return True
+        except:
+            return False
+            
+    def _update_cb(self, widget=None):
+        gobject.idle_add(self.update_speed)
+    
+    def update_speed(self):
+        t = self.get_temp()
+        h = self.get_humid()
+        
+        if (t is not None) and (h is not None):
+            s = arange.speed_of_sound(t, h/100)
+            self._set_speed(s)
+        return False