Added proof-of-concept GUI

It's by no means wonderful internally, but to a large extent it works.
The list functionality is still untested, since I won't be able to have
two PDB Sinks connected to my computer at once until tomorrow.  But for
now, a neat little GUI.

.gitignore

@@ -58,3 +58,5 @@ docs/_build/
 # PyBuilder
 target/
 
+# Glade temporary files
+*.ui~

data/pd-buddy-gtk.ui

@@ -0,0 +1,388 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.20.0 -->
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <object class="GtkImage" id="back-image">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">go-previous-symbolic</property>
+  </object>
+  <object class="GtkAdjustment" id="current-adjustment">
+    <property name="upper">5</property>
+    <property name="step_increment">1</property>
+    <property name="page_increment">10</property>
+  </object>
+  <object class="GtkApplicationWindow" id="pdb-window">
+    <property name="can_focus">False</property>
+    <property name="show_menubar">False</property>
+    <signal name="delete-event" handler="on_pdb_window_delete_event" swapped="no"/>
+    <signal name="realize" handler="on_pdb_window_realize" swapped="no"/>
+    <child>
+      <object class="GtkStack" id="stack">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="transition_type">slide-left-right</property>
+        <child>
+          <object class="GtkScrolledWindow" id="select">
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="hscrollbar_policy">never</property>
+            <property name="min_content_height">300</property>
+            <property name="propagate_natural_width">True</property>
+            <child>
+              <object class="GtkViewport">
+                <property name="visible">True</property>
+                <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="GtkStack" id="select-stack">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="vexpand">True</property>
+                        <child>
+                          <object class="GtkBox" id="select-none">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="halign">center</property>
+                            <property name="valign">center</property>
+                            <property name="margin_bottom">22</property>
+                            <property name="orientation">vertical</property>
+                            <child>
+                              <object class="GtkLabel" id="select-none-header">
+                                <property name="visible">True</property>
+                                <property name="can_focus">False</property>
+                                <property name="margin_bottom">12</property>
+                                <property name="label" translatable="yes">No devices found</property>
+                                <attributes>
+                                  <attribute name="weight" value="bold"/>
+                                  <attribute name="scale" value="2"/>
+                                </attributes>
+                                <style>
+                                  <class name="dim-label"/>
+                                </style>
+                              </object>
+                              <packing>
+                                <property name="expand">False</property>
+                                <property name="fill">True</property>
+                                <property name="position">0</property>
+                              </packing>
+                            </child>
+                            <child>
+                              <object class="GtkLabel" id="select-none-text">
+                                <property name="visible">True</property>
+                                <property name="can_focus">False</property>
+                                <property name="label" translatable="yes">All connected PD Buddy devices will appear here</property>
+                                <style>
+                                  <class name="dim-label"/>
+                                </style>
+                              </object>
+                              <packing>
+                                <property name="expand">False</property>
+                                <property name="fill">True</property>
+                                <property name="position">1</property>
+                              </packing>
+                            </child>
+                          </object>
+                          <packing>
+                            <property name="name">page1</property>
+                            <property name="title" translatable="yes">page1</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkFrame" id="select-frame">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="halign">center</property>
+                            <property name="valign">start</property>
+                            <property name="margin_left">50</property>
+                            <property name="margin_right">50</property>
+                            <property name="margin_top">22</property>
+                            <property name="margin_bottom">22</property>
+                            <property name="hexpand">False</property>
+                            <property name="label_xalign">0</property>
+                            <property name="shadow_type">in</property>
+                            <child>
+                              <object class="GtkAlignment">
+                                <property name="visible">True</property>
+                                <property name="can_focus">False</property>
+                                <child>
+                                  <object class="GtkListBox" id="select-list">
+                                    <property name="width_request">442</property>
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">False</property>
+                                    <property name="selection_mode">none</property>
+                                    <signal name="row-activated" handler="on_select_list_row_activated" swapped="no"/>
+                                  </object>
+                                </child>
+                              </object>
+                            </child>
+                            <child type="label_item">
+                              <placeholder/>
+                            </child>
+                          </object>
+                          <packing>
+                            <property name="name">page0</property>
+                            <property name="title" translatable="yes">page0</property>
+                            <property name="position">1</property>
+                          </packing>
+                        </child>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="name">page0</property>
+            <property name="title" translatable="yes">page0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkScrolledWindow" id="sink">
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="hscrollbar_policy">never</property>
+            <property name="min_content_height">300</property>
+            <property name="propagate_natural_width">True</property>
+            <child>
+              <object class="GtkViewport">
+                <property name="visible">True</property>
+                <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="GtkFrame">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="halign">center</property>
+                        <property name="margin_left">50</property>
+                        <property name="margin_right">50</property>
+                        <property name="margin_top">30</property>
+                        <property name="margin_bottom">22</property>
+                        <property name="hexpand">False</property>
+                        <property name="label_xalign">0</property>
+                        <property name="shadow_type">none</property>
+                        <child>
+                          <object class="GtkAlignment">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <child>
+                              <object class="GtkGrid">
+                                <property name="visible">True</property>
+                                <property name="can_focus">False</property>
+                                <property name="row_spacing">6</property>
+                                <property name="column_spacing">12</property>
+                                <child>
+                                  <object class="GtkLabel">
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">False</property>
+                                    <property name="label" translatable="yes">Voltage</property>
+                                    <property name="justify">right</property>
+                                    <style>
+                                      <class name="dim-label"/>
+                                    </style>
+                                  </object>
+                                  <packing>
+                                    <property name="left_attach">0</property>
+                                    <property name="top_attach">0</property>
+                                  </packing>
+                                </child>
+                                <child>
+                                  <object class="GtkLabel">
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">False</property>
+                                    <property name="label" translatable="yes">Current</property>
+                                    <property name="justify">right</property>
+                                    <style>
+                                      <class name="dim-label"/>
+                                    </style>
+                                  </object>
+                                  <packing>
+                                    <property name="left_attach">0</property>
+                                    <property name="top_attach">1</property>
+                                  </packing>
+                                </child>
+                                <child>
+                                  <object class="GtkSpinButton" id="current-spinbutton">
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">True</property>
+                                    <property name="input_purpose">number</property>
+                                    <property name="adjustment">current-adjustment</property>
+                                    <property name="digits">2</property>
+                                    <property name="numeric">True</property>
+                                    <signal name="value-changed" handler="on_current_spinbutton_changed" swapped="no"/>
+                                  </object>
+                                  <packing>
+                                    <property name="left_attach">1</property>
+                                    <property name="top_attach">1</property>
+                                  </packing>
+                                </child>
+                                <child>
+                                  <object class="GtkLabel">
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">False</property>
+                                    <property name="label" translatable="yes">A</property>
+                                  </object>
+                                  <packing>
+                                    <property name="left_attach">2</property>
+                                    <property name="top_attach">1</property>
+                                  </packing>
+                                </child>
+                                <child>
+                                  <object class="GtkLabel">
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">False</property>
+                                    <property name="label" translatable="yes">V</property>
+                                  </object>
+                                  <packing>
+                                    <property name="left_attach">2</property>
+                                    <property name="top_attach">0</property>
+                                  </packing>
+                                </child>
+                                <child>
+                                  <object class="GtkComboBoxText" id="voltage-combobox">
+                                    <property name="visible">True</property>
+                                    <property name="can_focus">False</property>
+                                    <items>
+                                      <item id="voltage-five" translatable="yes">5</item>
+                                      <item id="voltage-nine" translatable="yes">9</item>
+                                      <item id="voltage-fifteen" translatable="yes">15</item>
+                                      <item id="voltage-twenty" translatable="yes">20</item>
+                                    </items>
+                                    <signal name="changed" handler="on_voltage_combobox_changed" swapped="no"/>
+                                  </object>
+                                  <packing>
+                                    <property name="left_attach">1</property>
+                                    <property name="top_attach">0</property>
+                                  </packing>
+                                </child>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                        <child type="label_item">
+                          <placeholder/>
+                        </child>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="name">page1</property>
+            <property name="title" translatable="yes">page1</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+    <child type="titlebar">
+      <object class="GtkStack" id="header-stack">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <child>
+          <object class="GtkHeaderBar" id="header-select">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="title">Select Device</property>
+            <property name="show_close_button">True</property>
+            <child>
+              <object class="GtkLabel" id="dummy">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+              </object>
+              <packing>
+                <property name="pack_type">end</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="name">page0</property>
+            <property name="title" translatable="yes">page0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkHeaderBar" id="header-sink">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="title">PD Buddy Sink</property>
+            <property name="show_close_button">True</property>
+            <child>
+              <object class="GtkButton" id="header-sink-back">
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="receives_default">True</property>
+                <property name="image">back-image</property>
+                <signal name="clicked" handler="on_header_sink_back_clicked" swapped="no"/>
+                <accelerator key="Left" signal="clicked" modifiers="GDK_MOD1_MASK"/>
+              </object>
+            </child>
+            <child>
+              <object class="GtkRevealer" id="header-sink-save-revealer">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="transition_type">crossfade</property>
+                <child>
+                  <object class="GtkButtonBox">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="orientation">vertical</property>
+                    <property name="layout_style">start</property>
+                    <child>
+                      <object class="GtkButton" id="header-sink-save">
+                        <property name="label">gtk-save</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="use_stock">True</property>
+                        <signal name="clicked" handler="on_header_sink_save_clicked" swapped="no"/>
+                        <accelerator key="s" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
+                        <style>
+                          <class name="suggested-action"/>
+                        </style>
+                      </object>
+                      <packing>
+                        <property name="expand">True</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                  </object>
+                </child>
+              </object>
+              <packing>
+                <property name="pack_type">end</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="name">page1</property>
+            <property name="title" translatable="yes">page1</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

data/select-list-row.ui

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.20.0 -->
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <object class="GtkImage" id="identify-image">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">dialog-information-symbolic</property>
+    <child internal-child="accessible">
+      <object class="AtkObject" id="identify-image-atkobject">
+        <property name="AtkObject::accessible-name" translatable="yes">Identify</property>
+      </object>
+    </child>
+  </object>
+  <object class="GtkGrid" id="grid">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="valign">center</property>
+    <property name="margin_right">6</property>
+    <property name="margin_top">6</property>
+    <property name="margin_bottom">6</property>
+    <property name="column_spacing">16</property>
+    <child>
+      <object class="GtkLabel" id="name">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="halign">start</property>
+        <property name="margin_left">12</property>
+        <property name="hexpand">True</property>
+        <property name="label" translatable="yes">name</property>
+        <style>
+          <class name="title"/>
+        </style>
+      </object>
+      <packing>
+        <property name="left_attach">0</property>
+        <property name="top_attach">0</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkLabel" id="device">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="halign">start</property>
+        <property name="margin_left">12</property>
+        <property name="hexpand">True</property>
+        <property name="label" translatable="yes">device</property>
+        <attributes>
+          <attribute name="scale" value="0.90000000000000002"/>
+        </attributes>
+        <style>
+          <class name="dim-label"/>
+        </style>
+      </object>
+      <packing>
+        <property name="left_attach">0</property>
+        <property name="top_attach">1</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkButton" id="identify">
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">True</property>
+        <property name="tooltip_text" translatable="yes">Identify device</property>
+        <property name="image">identify-image</property>
+        <signal name="clicked" handler="on_identify_clicked" swapped="no"/>
+      </object>
+      <packing>
+        <property name="left_attach">1</property>
+        <property name="top_attach">0</property>
+        <property name="height">2</property>
+      </packing>
+    </child>
+  </object>
+</interface>

pd-buddy-gtk.py

@@ -0,0 +1,173 @@
+#!/usr/bin/env python3
+
+import sys
+
+import serial
+import serial.tools.list_ports
+import gi
+gi.require_version('Gtk', '3.0')
+from gi.repository import Gtk
+
+
+def pdb_send_message(sp, message):
+        # Open the serial port
+        # FIXME handle exceptions
+        sp = serial.Serial(sp.device, baudrate=115200, timeout=0.01)
+
+        sp.write(bytes(message, 'utf-8') + b'\r\n')
+        sp.flush()
+        answer = sp.readlines()
+
+        sp.close()
+
+        # Remove the echoed command and prompt
+        answer = answer[1:-1]
+        return answer
+
+class SelectListRow(Gtk.ListBoxRow):
+
+    def __init__(self, serial_port):
+        Gtk.EventBox.__init__(self)
+
+        self.serial_port = serial_port
+
+        self._builder = Gtk.Builder()
+        self._builder.add_from_file("data/select-list-row.ui")
+        self._builder.connect_signals(self)
+
+        name = self._builder.get_object("name")
+        name.set_text(serial_port.description)
+
+        device = self._builder.get_object("device")
+        device.set_text(serial_port.device)
+
+        self.add(self._builder.get_object("grid"))
+        self.show_all()
+
+    def on_identify_clicked(self, button):
+        pdb_send_message(self.serial_port, 'identify')
+
+
+class Handler:
+
+    def __init__(self, builder):
+        self.builder = builder
+
+    def on_pdb_window_realize(self, *args):
+        # Get the list
+        sl = self.builder.get_object("select-list")
+        ss = self.builder.get_object("select-stack")
+        sf = self.builder.get_object("select-frame")
+
+        # Search for the serial ports
+        for serport in serial.tools.list_ports.grep("1209:0001"):
+            # Show the list if we have a serial port
+            ss.set_visible_child(sf)
+            sl.insert(SelectListRow(serport), -1)
+
+    def on_pdb_window_delete_event(self, *args):
+        Gtk.main_quit(*args)
+
+    def on_select_list_row_activated(self, box, row):
+        # Get voltage and current widgets
+        voltage = self.builder.get_object("voltage-combobox")
+        current = self.builder.get_object("current-spinbutton")
+
+        self.serial_port = row.serial_port
+
+        pdb_send_message(self.serial_port, 'load')
+        lines = pdb_send_message(self.serial_port, 'get_tmpcfg')
+
+        # Get information
+        for line in lines:
+            if line.startswith(b'v:'):
+                v = line.split()[1]
+                if v == b'5.00':
+                    voltage.set_active_id('voltage-five')
+                elif v == b'9.00':
+                    voltage.set_active_id('voltage-nine')
+                elif v == b'15.00':
+                    voltage.set_active_id('voltage-fifteen')
+                if v == b'20.00':
+                    voltage.set_active_id('voltage-twenty')
+            elif line.startswith(b'i:'):
+                i = float(line.split()[1])
+                current.set_value(i)
+
+        # Hide the Save button
+        rev = self.builder.get_object("header-sink-save-revealer")
+        rev.set_reveal_child(False)
+
+        # Show the Sink page
+        hst = self.builder.get_object("header-stack")
+        hsink = self.builder.get_object("header-sink")
+        hsink.set_subtitle(row.serial_port.device)
+        hst.set_visible_child(hsink)
+
+        st = self.builder.get_object("stack")
+        sink = self.builder.get_object("sink")
+        st.set_visible_child(sink)
+
+    def on_header_sink_back_clicked(self, data):
+        # Show the Select page
+        hst = self.builder.get_object("header-stack")
+        hselect = self.builder.get_object("header-select")
+        hst.set_visible_child(hselect)
+
+        st = self.builder.get_object("stack")
+        select = self.builder.get_object("select")
+        st.set_visible_child(select)
+
+    def on_header_sink_save_clicked(self, button):
+        combo = self.builder.get_object("voltage-combobox")
+        spin = self.builder.get_object("current-spinbutton")
+        print("{} V".format(combo.get_active_text()))
+        print("{} A".format(spin.get_value()))
+        rev = self.builder.get_object("header-sink-save-revealer")
+        rev.set_reveal_child(False)
+
+        pdb_send_message(self.serial_port, 'write')
+
+    def on_voltage_combobox_changed(self, combo):
+        rev = self.builder.get_object("header-sink-save-revealer")
+        rev.set_reveal_child(True)
+
+        pdb_send_message(self.serial_port,
+                         'set_v {}'.format(int(combo.get_active_text())*1000))
+
+    def on_current_spinbutton_changed(self, spin):
+        rev = self.builder.get_object("header-sink-save-revealer")
+        rev.set_reveal_child(True)
+
+        pdb_send_message(self.serial_port,
+                         'set_i {}'.format(int(spin.get_value()*1000)))
+
+class Application(Gtk.Application):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, application_id="com.clayhobbs.pd-buddy-gtk",
+                         **kwargs)
+        self.window = None
+
+    def do_startup(self):
+        Gtk.Application.do_startup(self)
+
+        self.builder = Gtk.Builder()
+        self.builder.add_from_file("data/pd-buddy-gtk.ui")
+        self.builder.connect_signals(Handler(self.builder))
+
+    def do_activate(self):
+        # We only allow a single window and raise any existing ones
+        if not self.window:
+            # Windows are associated with the application
+            # when the last one is closed the application shuts down
+            self.window = self.builder.get_object("pdb-window")
+            self.add_window(self.window)
+            self.window.set_wmclass("PD Buddy Configuration",
+                                    "PD Buddy Configuration")
+
+        self.window.present()
+
+if __name__ == "__main__":
+    app = Application()
+    app.run(sys.argv)