[core] Collapse modules by using middle mouse

When pressing the middle mouse button (and it's not assigned to any
other functionality), the module (i.e. all widgets of that module) will
disappear and be replaced with the module's icon (or prefix, as
fallback) and an ellipsis.

fixes #264

bumblebee-status

@@ -48,6 +48,7 @@ def main():
             config=config,
             output=output,
             inp=inp,
+            theme=theme,
         )
         signal.signal(10,sig_USR1_handler)
         engine.run()

bumblebee/engine.py

@@ -41,6 +41,9 @@ class Module(object):
         self.error = None
         self._next = int(time.time())
         self._default_interval = 0
+        self._minimized = False
+
+        self._minimizedWidget = bumblebee.output.Widget(full_text=u"\u2026")
 
         self._configFile = None
         for cfg in [os.path.expanduser("~/.bumblebee-status.conf"), os.path.expanduser("~/.config/bumblebee-status.conf")]:
@@ -56,6 +59,12 @@ class Module(object):
         if widgets:
             self._widgets = widgets if isinstance(widgets, list) else [widgets]
 
+    def toggle_minimize(self):
+        self._minimized = not self._minimized
+
+    def minimized(self):
+        return self._minimized
+
     def widgets(self):
         """Return the widgets to draw for this module"""
         return self._widgets
@@ -68,6 +77,9 @@ class Module(object):
             if widget.name == name:
                 return widget
 
+    def minimizedWidget(self):
+        return self._minimizedWidget
+
     def errorWidget(self):
         msg = self.error
         if len(msg) > 10:
@@ -78,6 +90,8 @@ class Module(object):
         for widget in self._widgets:
             if widget.id == uid:
                 return widget
+        if self._minimizedWidget.id == uid:
+            return self._minimizedWidget
         return None
 
     def update(self, widgets):
@@ -110,12 +124,9 @@ class Module(object):
         """Return the config parameter 'name' for this module"""
         name = "{}.{}".format(self.name, name)
         value = self._config["config"].get(name, default)
-        log.debug("command line parameter {}={}".format(name, str(value)))
         if value == default:
             try:
-                log.debug("trying to read {} from configuration file".format(name))
                 value = self._configFile.get("module-parameters", name)
-                log.debug("configuration file {}={}".format(name, str(value)))
             except:
                 pass
         return value
@@ -133,7 +144,7 @@ class Engine(object):
     This class connects input/output, instantiates all
     required modules and drives the "event loop"
     """
-    def __init__(self, config, output=None, inp=None):
+    def __init__(self, config, output=None, inp=None, theme=None):
         self._output = output
         self._config = config
         self._running = True
@@ -142,6 +153,7 @@ class Engine(object):
         self._aliases = self._read_aliases()
         self.load_modules(config.modules())
         self._current_module = None
+        self._theme = theme
 
         if bumblebee.util.asbool(config.get("engine.workspacewheel", "true")):
             if bumblebee.util.asbool(config.get("engine.workspacewrap", "true")):
@@ -154,9 +166,18 @@ class Engine(object):
                     cmd=self._prev_workspace)
                 self.input.register_callback(None, bumblebee.input.WHEEL_DOWN,
                     cmd=self._next_workspace)
+        if bumblebee.util.asbool(config.get("engine.collapsible", "true")):
+            self.input.register_callback(None, bumblebee.input.MIDDLE_MOUSE,
+                cmd=self._toggle_minimize)
 
         self.input.start()
 
+    def _toggle_minimize(self, event):
+        for module in self._modules:
+            if module.widget_by_id(event["instance"]):
+                log.debug("module {} found - toggle minimize".format(module.id))
+                module.toggle_minimize()
+
     def _prev_workspace(self, event):
         self._change_workspace(-1)
 
@@ -268,9 +289,16 @@ class Engine(object):
             self._current_module = module
             module.update_wrapper(module.widgets())
             if module.error == None:
-                for widget in module.widgets():
+                if module.minimized():
+                    widget = module.minimizedWidget()
                     widget.link_module(module)
+                    if self._theme:
+                        icon = self._theme.icon(widget)
                     self._output.draw(widget=widget, module=module, engine=self)
+                else:
+                    for widget in module.widgets():
+                        widget.link_module(module)
+                        self._output.draw(widget=widget, module=module, engine=self)
             else:
                 self._output.draw(widget=module.errorWidget(), module=module, engine=self)
         self._output.flush()

bumblebee/output.py

@@ -102,10 +102,12 @@ class I3BarOutput(object):
         padding = self._theme.padding(widget)
         prefix = self._theme.prefix(widget, padding)
         suffix = self._theme.suffix(widget, padding)
+
         if prefix:
             full_text = u"{}{}".format(prefix, full_text)
         if suffix:
             full_text = u"{}{}".format(full_text, suffix)
+
         separator = self._theme.separator(widget)
         if separator:
             self._widgets.append({

bumblebee/theme.py

@@ -100,6 +100,11 @@ class Theme(object):
         self._widget = None
         self._prevbg = None
 
+    def icon(self, widget):
+        icon = self._get(widget, "icon", None)
+        if icon == None:
+            return self._get(widget, "prefix", None)
+
     def padding(self, widget):
         """Return padding for widget"""
         return self._get(widget, "padding", "")