[WIP] [Feature] Display parameters

brainsprite_widget/traits.py

@@ -0,0 +1,38 @@
+import re
+import six
+
+from traitlets import TraitType
+
+
+class Point3D(TraitType):
+    default_value = {'x': 0, 'y': 0, 'z': 0}
+    info_text = 'a 3D point'
+
+    def validate(self, obj, value):
+        if isinstance(value, dict):
+            if all(a in value for a in ['x', 'y', 'z']) and \
+               all(isinstance(value[a], int) in value for a in ['x', 'y', 'z']):
+                return value
+        self.error(obj, value)
+
+
+class Color(TraitType):
+    """A trait for unicode strings."""
+
+    default_value = '#000000'
+    info_text = 'a hex color string'
+
+    def validate(self, obj, value):
+
+        decoded = value
+        if isinstance(value, bytes):
+            try:
+                decoded = value.decode('ascii', 'strict')
+            except UnicodeDecodeError:
+                self.error(obj, value)
+
+        if isinstance(decoded, six.text_type) and \
+           re.match(r'^#(?:[0-9a-fA-F]{3}){1,2}$', decoded):
+            return decoded
+
+        self.error(obj, value)

brainsprite_widget/widget.py

@@ -1,7 +1,8 @@
 import nibabel as nb
 import ipywidgets as widgets
-from traitlets import Unicode, Bytes
+from traitlets import Unicode, Bytes, Bool, Dict, Int, Float
 from .brainsprite import view_stat_map
+from .traits import Point3D, Color
 
 @widgets.register
 class BrainspriteWidget(widgets.DOMWidget):
@@ -14,6 +15,41 @@ class BrainspriteWidget(widgets.DOMWidget):
     _model_module_version = Unicode('^0.1.0').tag(sync=True)
     sprite = Bytes(help='Sprite image').tag(sync=True)
 
-    def __init__(self, image):
+    nan_values = Bool(help='NaN image values, i.e. unable to read values').tag(sync=True)
+    smooth = Bool(help='Smoothing of the main slices').tag(sync=True)
+    coordinates = Bool(help='Show slice numbers').tag(sync=True)
+    origin = Point3D(help='Origin').tag(sync=True)
+    voxel_size = Int(help='Voxel size').tag(sync=True)
+
+    background = Color(help='Background color for the canvas').tag(sync=True)
+
+    colorbar_height = Float(help='Colorbar size parameters').tag(sync=True)
+
+    font_size = Float(help='Font size').tag(sync=True)
+    font_color = Color(help='Font color').tag(sync=True)
+    decimals = Int(help='Number of decimals displayed', min=0).tag(sync=True)
+
+    crosshair = Bool(help='Show crosshair').tag(sync=True)
+    crosshair_color = Color(help='Crosshair color').tag(sync=True)
+    crosshair_size = Float(help='Crosshair size', min=0).tag(sync=True)
+
+    def __init__(self, image, nan_values, smooth, coordinates, origin,
+                 voxel_size, background, colorbar_height, font_size, font_color,
+                 decimals, crosshair, crosshair_color, crosshair_size):
+
         super(BrainspriteWidget, self).__init__()
+
         self.sprite = view_stat_map(image)
+        self.nan_values = nan_values
+        self.smooth = smooth
+        self.coordinates = coordinates
+        self.origin = origin
+        self.voxel_size = voxel_size
+        self.background = background
+        self.colorbar_height = colorbar_height
+        self.font_size = font_size
+        self.font_color = font_color
+        self.decimals = decimals
+        self.crosshair = crosshair
+        self.crosshair_color = crosshair_color
+        self.crosshair_size = crosshair_size