Adwaita theme missing
Posted: Tue Jan 03, 2017 8:06 pm
i have a recurring problem when running a program with a GUI, below is an example.
I want the textbox background to be black with green text. Move the slider to update the text in the textbox.
The problem is the textbox background remains white and I continually have this warning when I run the program.
My raspberry pi is missing something? But I don't know what it is, I have googled and haven't come up with a resolution hence my question. The pi runs 'jessie' with all the latest updates, can you help?
GUI named 'gtkscale2.py'
I want the textbox background to be black with green text. Move the slider to update the text in the textbox.
The problem is the textbox background remains white and I continually have this warning when I run the program.
Running the same code on my main pc with fedora, I have no such error and the textbox background shows black as expected.(gtkscale2.py:3523): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:2:19:Theming engine 'adwaita' not found
My raspberry pi is missing something? But I don't know what it is, I have googled and haven't come up with a resolution hence my question. The pi runs 'jessie' with all the latest updates, can you help?
Code: Select all
#!/usr/bin/env python
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk, GObject
import random
class Handler:
def __init__(self):
self.builder = Gtk.Builder()
self.builder.add_from_file("gtkscale2.glade")
self.builder.connect_signals(self)
self.window = self.builder.get_object("window1")
self.window.set_default_size(240, 120)
self.hscale = self.builder.get_object("hscale")
self.text_window = self.builder.get_object("text_window")
self.text_window.modify_fg(Gtk.StateFlags.NORMAL, Gdk.color_parse("light green"))
self.text_window.modify_bg(Gtk.StateFlags.NORMAL, Gdk.color_parse("black"))
def adjustment1_value_changed_cb(self, x):
number = self.hscale.get_value()
self.text_window.set_text("%.2f V" % (number))
if __name__ == "__main__":
app = Handler()
app.window.show_all()
Gtk.main()Code: Select all
<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.20.0 -->
<interface>
<requires lib="gtk+" version="3.14"/>
<object class="GtkAdjustment" id="adjustment1">
<property name="upper">40</property>
<property name="value">10</property>
<property name="step_increment">0.01</property>
<property name="page_increment">10</property>
<signal name="value-changed" handler="adjustment1_value_changed_cb" swapped="no"/>
</object>
<object class="GtkWindow" id="window1">
<property name="can_focus">False</property>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkLabel">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">hi</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkScale" id="hscale">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="adjustment">adjustment1</property>
<property name="lower_stepper_sensitivity">on</property>
<property name="upper_stepper_sensitivity">on</property>
<property name="show_fill_level">True</property>
<property name="round_digits">2</property>
<property name="digits">2</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">False</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkEntry" id="text_window">
<property name="visible">True</property>
<property name="can_focus">True</property>
</object>
<packing>
<property name="expand">True</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
</object>
</child>
</object>
</interface>