ENH: Add vmin and vmax to viewer

Closes #723

itkwidgets/_initialization_params.py

@@ -15,6 +15,8 @@ def init_params_dict(itk_viewer):
         'blend_mode': itk_viewer.setImageBlendMode,
         'cmap': itk_viewer.setImageColorMap,
         'color_range': itk_viewer.setImageColorRange,
+        'vmin': itk_viewer.setImageColorRangeMin,
+        'vmax': itk_viewer.setImageColorRangeMax,
         'color_bounds': itk_viewer.setImageColorRangeBounds,
         'component_visible': itk_viewer.setImageComponentVisibility,
         'gradient_opacity': itk_viewer.setImageGradientOpacity,

itkwidgets/viewer.py

@@ -335,6 +335,27 @@ def set_image_color_range(self, range: List[float]):
     async def get_image_color_range(self):
         return await self.viewer_rpc.itk_viewer.getImageColorRange()
 
+    @property
+    @fetch_value
+    async def vmin(self):
+        range = await self.get_image_color_range()
+        return range[0]
+    @vmin.setter
+    @fetch_value
+    async def vmin(self, vmin: float):
+        self.queue_request('setImageColorRangeMin', vmin)
+
+    @property
+    @fetch_value
+    async def vmax(self):
+        range = await self.get_image_color_range()
+        return range[1]
+    @vmax.setter
+    @fetch_value
+    async def vmax(self, vmax: float):
+        self.queue_request('setImageColorRangeMax', vmax)
+
+
     @fetch_value
     def set_image_color_range_bounds(self, range: List[float]):
         self.queue_request('setImageColorRangeBounds', range)