GladeVCP - getting started with buttons

Start
Prev
1
Next
End

tnl.lambert
Offline
Junior Member

10 Dec 2014 01:10 #53850 by tnl.lambert

GladeVCP - getting started with buttons was created by tnl.lambert

So - very new to GladeVCP, but I'm trying to get a panel together that will do a few things:

- interact with the user via buttons and toggles
- generate a text file to log error messages
- send and receive signals over rs232
- generate G-code that will be run by AXIS

Unpacking this a bit:

I need to develop a panel that will communicate over rs232 to another machine during the operation of a g-code file. I need to log any errors that I get in the g-code, linuxcnc, or from the other machine. I assume that python callbacks will suffice to perform these tasks. That said: I'm stuck at a relatively early part of the setup.

I have modified my INI file to read like this:

GLADEVCP = -u /home/stan/Documents/pythontests/handlers.py /home/stan/Documents/gladetests/test1.ui  (apparently calling the .ui file earlier in the line than the .py file generated an error)

My handlers.py file looks like this:

#!/usr/bin/env python

import hal
import gtk
import glib
#import serial

class HandlerClass:

	def __init__(self):
		filename = "/home/stan/Documents/gladetests/test1.ui"
		builder = gtk.Builder()
		builder.add_from_file(filename)
		builder.connect_signals(self)

        nhits = 0     
	def on_hal_button1_press(self,hal_button1,hal_label1,data=None):
		global nhits 
		nhits += 1 
		hal_label1.set_label("hits: %d" % nhits)
		print "on_led_pin_changed() - HAL pin value: %d",hal_led1.hal_pin1.get()
    
def get_handlers(halcomp,builder,useropts):
	for cmd in useropts:
		exec cmd in globals()
	return [HandlerClass(halcomp,builder,useropts)]

And my test1.ui file looks like this:

<?xml version="1.0"?>
<interface>
  <!-- interface-requires gladevcp 0.0 -->
  <requires lib="gtk+" version="2.16"/>
  <!-- interface-naming-policy project-wide -->
  <object class="GtkWindow" id="window1">
    <child>
      <object class="HAL_Table" id="hal_table1">
        <property name="visible">True</property>
        <property name="n_rows">3</property>
        <property name="n_columns">3</property>
        <child>
          <object class="HAL_LED" id="hal_led1">
            <property name="visible">True</property>
            <property name="led_blink_rate">500</property>
            <signal name="hal_pin_changed" handler="on_hal_led1_hal_pin_changed"/>
          </object>
        </child>
        <child>
          <object class="HAL_LED" id="hal_led2">
            <property name="visible">True</property>
          </object>
          <packing>
            <property name="left_attach">1</property>
            <property name="right_attach">2</property>
          </packing>
        </child>
        <child>
          <object class="HAL_LED" id="hal_led3">
            <property name="visible">True</property>
          </object>
          <packing>
            <property name="left_attach">2</property>
            <property name="right_attach">3</property>
          </packing>
        </child>
        <child>
          <object class="HAL_Button" id="hal_button1">
            <property name="label" translatable="yes">X Button</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <signal name="pressed" handler="on_hal_button1_pressed"/>
          </object>
          <packing>
            <property name="top_attach">1</property>
            <property name="bottom_attach">2</property>
          </packing>
        </child>
        <child>
          <object class="HAL_Button" id="hal_button2">
            <property name="label" translatable="yes">Y Button</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
          </object>
          <packing>
            <property name="left_attach">1</property>
            <property name="right_attach">2</property>
            <property name="top_attach">1</property>
            <property name="bottom_attach">2</property>
          </packing>
        </child>
        <child>
          <object class="HAL_Button" id="hal_button3">
            <property name="label" translatable="yes">Z Button</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
          </object>
          <packing>
            <property name="left_attach">2</property>
            <property name="right_attach">3</property>
            <property name="top_attach">1</property>
            <property name="bottom_attach">2</property>
          </packing>
        </child>
        <child>
          <object class="HAL_Label" id="hal_label1">
            <property name="visible">True</property>
            <property name="label" translatable="yes">label</property>
            <signal name="hal_pin_changed" handler="on_hal_label1_hal_pin_changed"/>
          </object>
          <packing>
            <property name="top_attach">2</property>
            <property name="bottom_attach">3</property>
          </packing>
        </child>
        <child>
          <object class="HAL_Label" id="hal_label2">
            <property name="visible">True</property>
            <property name="label" translatable="yes">label</property>
          </object>
          <packing>
            <property name="left_attach">1</property>
            <property name="right_attach">2</property>
            <property name="top_attach">2</property>
            <property name="bottom_attach">3</property>
          </packing>
        </child>
        <child>
          <object class="HAL_Label" id="hal_label3">
            <property name="visible">True</property>
            <property name="label" translatable="yes">label</property>
          </object>
          <packing>
            <property name="left_attach">2</property>
            <property name="right_attach">3</property>
            <property name="top_attach">2</property>
            <property name="bottom_attach">3</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
  <object class="GtkAction" id="action1"/>
</interface>

I assume that there are some basic things I'm missing.

Please Log in or Create an account to join the conversation.

andypugh
Offline
Moderator

10 Dec 2014 19:23 #53866 by andypugh

Replied by andypugh on topic GladeVCP - getting started with buttons

tnl.lambert wrote:
That said: I'm stuck at a relatively early part of the setup.

What isn't happening that you expected to happen?

Please Log in or Create an account to join the conversation.

andypugh
Offline
Moderator

10 Dec 2014 19:26 #53867 by andypugh

Replied by andypugh on topic GladeVCP - getting started with buttons

tnl.lambert wrote:

def on_hal_button1_press(self,hal_button1,hal_label1,data=None):
		global nhits

          <object class="HAL_Button" id="hal_button1">
...
            <signal name="pressed" handler="on_hal_button1_pressed"/>

I assume that there are some basic things I'm missing.

hal_button1_press / hal_button1_pressed looks like one likely source of trouble.

Please Log in or Create an account to join the conversation.

tnl.lambert
Offline
Junior Member

12 Dec 2014 04:43 #53936 by tnl.lambert

Replied by tnl.lambert on topic GladeVCP - getting started with buttons

Good catch on the handler name, but it apparently wasn't the source of the problem. Running my system from the terminal gives:

(gladevcp:1876): libglade-WARNING **: did not finish in PARSER_FINISH state
**** GLADE VCP INFO:    Not a libglade project, trying to load as a GTK builder project
gladevcp: trouble looking for handlers in 'handlers': __init__() takes exactly 1 argument (4 given)
Traceback (most recent call last):
  File "/usr/bin/gladevcp", line 122, in load_handlers
    objlist = h(halcomp,builder,useropts)
  File "/home/stan/Documents/pythontests/handlers.py", line 58, in get_handlers
    return [HandlerClass(halcomp,builder,useropts)]
TypeError: __init__() takes exactly 1 argument (4 given)
/usr/bin/gladevcp:211: RuntimeWarning: missing handler 'on_hal_label1_hal_pin_changed'
  builder.connect_signals(handlers)
/usr/bin/gladevcp:211: RuntimeWarning: missing handler 'on_hal_button1_pressed'
  builder.connect_signals(handlers)
/usr/bin/gladevcp:211: RuntimeWarning: missing handler 'on_hal_led1_hal_pin_changed'
  builder.connect_signals(handlers)
Xlib.protocol.request.QueryExtension
Xlib.protocol.request.QueryExtension

I think that there might be an issue with how I've set up the whole thing. What libraries do I need to import? Or is there a problem with how I've defined my handlers?

Please Log in or Create an account to join the conversation.

andypugh
Offline
Moderator

12 Dec 2014 05:00 #53937 by andypugh

Replied by andypugh on topic GladeVCP - getting started with buttons

tnl.lambert wrote:
gladevcp: trouble looking for handlers in 'handlers': __init__() takes exactly 1 argument (4 given)

So, your __init__(self) is only expecting one argument, but something is giving it 4.

If you look at the examples, they use :
def __init__(self, halcomp,builder,useropts):
(ie, variables to accept 4 arguments)

Please Log in or Create an account to join the conversation.

tnl.lambert
Offline
Junior Member

12 Dec 2014 06:05 #53940 by tnl.lambert

Replied by tnl.lambert on topic GladeVCP - getting started with buttons

Okay, I've gotten rid of that problem, but I still don't really have a handle on the reasoning. I understand that mismatched calls will result in errors, but I don't know what I'm passing in, or why. I also have no idea what the realm of possibilities are for gladeVCP. Is there a good manual for it? I've read the stuff I've found, but none of it has covered actions that affect other gladeVCP objects, or actions that are persistent. Can I run g-code from python through gladeVCP for instance?

Please Log in or Create an account to join the conversation.

andypugh
Offline
Moderator

12 Dec 2014 07:36 #53944 by andypugh

Replied by andypugh on topic GladeVCP - getting started with buttons

tnl.lambert wrote:
I understand that mismatched calls will result in errors, but I don't know what I'm passing in, or why.

__init__() is called by the setup code that does the GladeVCP magic in LinuxCNC. You just have to know what parameters it takes, and the page you have probably seen shows that:
www.linuxcnc.org/docs/html/gui/gladevcp....GladeVCP_Programming
The LinuxCNC-specific widgets are described on that page too. For the other controls (non-HAL buttons etc) you need to look at the GTK docs to see what is passed in to your event handler.
developer.gnome.org/pygtk/stable/

Can I run g-code from python through gladeVCP for instance?

Yes, the easiest way is the MDI command of the LinuxCNC Python interface:
www.linuxcnc.org/docs/html/common/python-interface.html

The following user(s) said Thank You: tnl.lambert

Please Log in or Create an account to join the conversation.

Start
Prev
1
Next
End

Moderators: HansU

Time to create page: 0.144 seconds