Possible method of making Compound Controls

mGui/core/compound.py

@@ -0,0 +1,78 @@
+
+import weakref
+
+from .controls import IntField, IconTextButton, Button, Text
+from ..forms import HorizontalStretchForm, VerticalStretchForm
+from ..events import MayaEvent
+
+
+class CompoundControl(type):
+    # Some magic will happen here?
+    pass
+
+
+class IntSpinner:
+    __metaclass__ = CompoundControl
+
+    _CONTROLS = {
+        'root': HorizontalStretchForm,
+        'field': IntField,
+        'label': Text,
+        'decrement': Button,
+        'increment': Button,
+        'form': VerticalStretchForm,
+    }
+    _HIERARCHY = {
+        'root': (
+            'label',
+            'field', {
+                'form': (
+                    'increment',
+                    'decrement'
+                )
+            }
+        )
+    }
+
+
+class IntSpinner(object):
+
+    def __init__(self, key=None, **kwargs):
+        self._step = kwargs.pop('step', 1)
+        value = kwargs.pop('value', 0)
+
+        height = kwargs.pop('height', kwargs.pop('h', 32))
+        width = kwargs.pop('width', kwargs.pop('w', 256))
+        with HorizontalStretchForm(key='IntSpinner#', **kwargs) as self.root:
+            self.field = IntField(height=height, width=width - height, value=value)
+            with VerticalStretchForm() as self.form:
+                self.increment = Button(height=height / 2, width=height, label='^')
+                self.decrement = Button(height=height / 2, width=height, label='v')
+
+        self.increment.command += self._inc
+        self.decrement.command += self._dec
+
+    @property
+    def step(self):
+        return self._step
+
+    @step.setter
+    def step(self, value):
+        self._step = value
+
+    def _inc(self, *args, **kwargs):
+        self.field.value += self._step
+
+    def _dec(self, *args, **kwargs):
+        self.field.value -= self._step
+
+    def __getattr__(self, attr):
+        if hasattr(self, 'root') and hasattr(self.root, attr):
+            return getattr(self.root, attr)
+        return super(IntSpinner, self).__getattribute__(attr)
+
+    def __setattr__(self, attr, value):
+        if hasattr(self, 'root') and hasattr(self.root, attr):
+            setattr(self.root, attr, value)
+        else:
+            self.__dict__[attr] = value