Added 'simple' viewers which can be used for testing or simple use cases

.circleci/config.yml

@@ -0,0 +1,96 @@
+version: 2.1
+
+jobs:
+
+  # The following job is to run any visual comparison test, and runs on any branch
+  # or in any pull request. It will generate a summary page for each tox environment
+  # being run which is accessible through the CircleCI artifacts.
+
+  visual:
+    parameters:
+      jobname:
+        type: string
+    docker:
+      - image: cimg/python:3.11
+    environment:
+      TOXENV: << parameters.jobname >>
+    steps:
+      - checkout
+      - run:
+          name: Install dependencies
+          command: |
+            sudo apt update
+            pip install pip tox --upgrade
+      - run:
+          name: Run tests
+          command: tox -v
+      - store_artifacts:
+          path: results
+      - run:
+          name: "Image comparison page is available at: "
+          command: echo "${CIRCLE_BUILD_URL}/artifacts/${CIRCLE_NODE_INDEX}/results/fig_comparison.html"
+
+  # The following job runs only on main - and its main purpose is to update the
+  # reference images in the glue-core-visual-tests repository. This job needs
+  # a deploy key. To produce this, go to the glue-core-visual-tests
+  # repository settings and go to SSH keys, then add your public SSH key.
+  deploy-reference-images:
+    parameters:
+      jobname:
+        type: string
+    docker:
+      - image: cimg/python:3.11
+    environment:
+      TOXENV: << parameters.jobname >>
+    steps:
+      - checkout
+      - run:
+          name: Install dependencies
+          command: |
+            sudo apt update
+            pip install pip tox --upgrade
+      - run: ssh-add -D
+      - add_ssh_keys:
+          fingerprints: "44:09:69:d7:c6:77:25:e9:46:da:f1:22:7d:d4:38:29"
+      - run: ssh-keyscan github.com >> ~/.ssh/known_hosts
+      - run: git config --global user.email "glue@circleci" && git config --global user.name "Glue Circle CI"
+      - run: git clone [email protected]:glue-viz/glue-core-visual-tests.git --depth 1 ~/glue-core-visual-tests/
+      - run:
+          name: Generate reference images
+          command: tox -v -- --mpl-generate-path=/home/circleci/glue-core-visual-tests/images/$TOXENV
+      - run: |
+          cd ~/glue-core-visual-tests/
+          git pull
+          git status
+          git add .
+          git commit -m "Update reference images from ${CIRCLE_BRANCH}" || echo "No changes to reference images to deploy"
+          git push
+
+workflows:
+  version: 2
+
+  visual-tests:
+    jobs:
+      - visual:
+          name: << matrix.jobname >>
+          matrix:
+            parameters:
+              jobname:
+                - "py311-test-visual"
+
+      - deploy-reference-images:
+          name: baseline-<< matrix.jobname >>
+          matrix:
+            parameters:
+              jobname:
+                - "py311-test-visual"
+          requires:
+            - << matrix.jobname >>
+          filters:
+            branches:
+              only:
+                - main
+
+notify:
+  webhooks:
+    - url: https://giles.cadair.dev/circleci

.gitignore

@@ -43,3 +43,5 @@ glue/_githash.py
 .vscode
 # vscode plugin
 .history
+
+results

glue/tests/visual/helpers.py

@@ -0,0 +1,46 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
+
+from functools import wraps
+
+import pytest
+
+try:
+    import pytest_mpl  # noqa
+except ImportError:
+    HAS_PYTEST_MPL = False
+else:
+    HAS_PYTEST_MPL = True
+
+
+def visual_test(*args, **kwargs):
+    """
+    A decorator that defines a visual test.
+
+    This automatically decorates tests with mpl_image_compare with common
+    options used by all figure tests in glue-core.
+    """
+
+    tolerance = kwargs.pop("tolerance", 0)
+    style = kwargs.pop("style", {})
+    savefig_kwargs = kwargs.pop("savefig_kwargs", {})
+    savefig_kwargs["metadata"] = {"Software": None}
+
+    def decorator(test_function):
+        @pytest.mark.mpl_image_compare(
+            tolerance=tolerance, style=style, savefig_kwargs=savefig_kwargs, **kwargs
+        )
+        @pytest.mark.skipif(
+            not HAS_PYTEST_MPL, reason="pytest-mpl is required for the figure tests"
+        )
+        @wraps(test_function)
+        def test_wrapper(*args, **kwargs):
+            return test_function(*args, **kwargs)
+
+        return test_wrapper
+
+    # If the decorator was used without any arguments, the only positional
+    # argument will be the test to decorate so we do the following:
+    if len(args) == 1:
+        return decorator(*args)
+
+    return decorator

glue/tests/visual/py311-test-visual.json

@@ -0,0 +1,6 @@
+{
+    "glue.viewers.histogram.tests.test_viewer.test_simple_viewer": "cb08123fbad135ab614bb7ec13475fcc83321057d884fe80c3a32970b2d14762",
+    "glue.viewers.image.tests.test_viewer.test_simple_viewer": "72abd60b484d14f721254f027bb0ab9b36245d5db77eb87693f4dd9998fd28be",
+    "glue.viewers.profile.tests.test_viewer.test_simple_viewer": "f68a21be5080fec513388b2d2b220512e7b0df5498e2489da54e58708de435b3",
+    "glue.viewers.scatter.tests.test_viewer.test_simple_viewer": "1020a7bd3abe40510b9e03047c3b423b75c3c64ac18e6dcd6257173cec1ed53f"
+  }

glue/viewers/histogram/layer_artist.py

@@ -12,6 +12,8 @@
 from glue.viewers.matplotlib.layer_artist import MatplotlibLayerArtist
 from glue.core.exceptions import IncompatibleAttribute, IncompatibleDataException
 
+__all__ = ["HistogramLayerArtist"]
+
 
 class HistogramLayerArtist(MatplotlibLayerArtist):
 

glue/viewers/histogram/tests/test_state.py → glue/viewers/histogram/tests/test_viewer.py

@@ -1,11 +1,34 @@
-from glue.viewers.common.viewer import Viewer
-from glue.viewers.histogram.state import HistogramViewerState
+import numpy as np
+
+from astropy.utils import NumpyRNGContext
+
+from glue.tests.visual.helpers import visual_test
+from glue.viewers.histogram.viewer import SimpleHistogramViewer
 from glue.core.application_base import Application
 from glue.core.data import Data
 
 
-class TestHistogramViewer(Viewer):
-    _state_cls = HistogramViewerState
+@visual_test
+def test_simple_viewer():
+
+    # Make sure the simple viewer can be instantiated
+
+    with NumpyRNGContext(12345):
+
+        data1 = Data(x=np.random.normal(1, 2, 1000), label='data1')
+        data2 = Data(y=np.random.uniform(-1, 5, 1000), label='data2')
+
+    app = Application()
+    app.data_collection.append(data1)
+    app.data_collection.append(data2)
+
+    viewer = app.new_data_viewer(SimpleHistogramViewer)
+    viewer.add_data(data1)
+    viewer.add_data(data2)
+
+    app.data_collection.new_subset_group(label='subset1', subset_state=data1.id['x'] > 2)
+
+    return viewer.figure
 
 
 def test_remove_data_collection():
@@ -22,7 +45,7 @@
     app.data_collection.append(data1)
     app.data_collection.append(data2)
 
-    viewer = app.new_data_viewer(TestHistogramViewer)
+    viewer = app.new_data_viewer(SimpleHistogramViewer)
     viewer.add_data(data1)
     viewer.add_data(data2)
 
@@ -46,7 +69,7 @@
     app.data_collection.append(data1)
     app.data_collection.append(data2)
 
-    viewer = app.new_data_viewer(TestHistogramViewer)
+    viewer = app.new_data_viewer(SimpleHistogramViewer)
     viewer.add_data(data1)
     viewer.add_data(data2)
 

glue/viewers/histogram/viewer.py

@@ -3,9 +3,12 @@
 from glue.core.subset import roi_to_subset_state
 from glue.utils import mpl_to_datetime64
 
+from glue.viewers.matplotlib.viewer import SimpleMatplotlibViewer
 from glue.viewers.histogram.compat import update_histogram_viewer_state
+from glue.viewers.histogram.layer_artist import HistogramLayerArtist
+from glue.viewers.histogram.state import HistogramViewerState
 
-__all__ = ['MatplotlibHistogramMixin']
+__all__ = ['MatplotlibHistogramMixin', 'SimpleHistogramViewer']
 
 
 class MatplotlibHistogramMixin(object):
@@ -69,3 +72,14 @@ def apply_roi(self, roi, override_mode=None):
     @staticmethod
     def update_viewer_state(rec, context):
         return update_histogram_viewer_state(rec, context)
+
+
+class SimpleHistogramViewer(MatplotlibHistogramMixin, SimpleMatplotlibViewer):
+
+    _state_cls = HistogramViewerState
+    _data_artist_cls = HistogramLayerArtist
+    _subset_artist_cls = HistogramLayerArtist
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        MatplotlibHistogramMixin.setup_callbacks(self)

glue/viewers/image/tests/test_viewer.py

@@ -0,0 +1,27 @@
+import numpy as np
+
+from glue.tests.visual.helpers import visual_test
+from glue.viewers.image.viewer import SimpleImageViewer
+from glue.core.application_base import Application
+from glue.core.data import Data
+
+
+@visual_test
+def test_simple_viewer():
+
+    # Make sure the simple viewer can be instantiated
+
+    data1 = Data(x=np.arange(6).reshape((2, 3)), label='data1')
+    data2 = Data(y=2 * np.arange(6).reshape((2, 3)), label='data2')
+
+    app = Application()
+    app.data_collection.append(data1)
+    app.data_collection.append(data2)
+
+    viewer = app.new_data_viewer(SimpleImageViewer)
+    viewer.add_data(data1)
+    viewer.add_data(data2)
+
+    app.data_collection.new_subset_group(label='subset1', subset_state=data1.pixel_component_ids[1] > 1.2)
+
+    return viewer.figure

glue/viewers/image/viewer.py

@@ -7,14 +7,16 @@
 from glue.core.coordinate_helpers import dependent_axes
 from glue.core.data_region import RegionData
 
+from glue.viewers.matplotlib.viewer import SimpleMatplotlibViewer
 from glue.viewers.scatter.layer_artist import ScatterLayerArtist, ScatterRegionLayerArtist
 from glue.viewers.image.layer_artist import ImageLayerArtist, ImageSubsetLayerArtist
 from glue.viewers.image.compat import update_image_viewer_state
+from glue.viewers.image.state import ImageViewerState
 
 from glue.viewers.image.frb_artist import imshow
 from glue.viewers.image.composite_array import CompositeArray
 
-__all__ = ['MatplotlibImageMixin']
+__all__ = ['MatplotlibImageMixin', 'SimpleImageViewer']
 
 
 def get_identity_wcs(naxis):
@@ -258,3 +260,13 @@
                        x_ticklabel_size=self.state.x_ticklabel_size,
                        y_ticklabel_size=self.state.y_ticklabel_size)
         return [], EXTRA_FOOTER.format(**options) + os.linesep * 2 + script
+
+
+class SimpleImageViewer(MatplotlibImageMixin, SimpleMatplotlibViewer):
+
+    _state_cls = ImageViewerState
+
+    def __init__(self, *args, **kwargs):
+        kwargs['wcs'] = True
+        super().__init__(*args, **kwargs)
+        MatplotlibImageMixin.setup_callbacks(self)

glue/viewers/matplotlib/viewer.py

@@ -6,11 +6,12 @@
 from matplotlib.artist import setp as msetp
 
 from glue.config import settings
-from glue.viewers.matplotlib.mpl_axes import update_appearance_from_settings
+from glue.viewers.common.viewer import Viewer
+from glue.viewers.matplotlib.mpl_axes import update_appearance_from_settings, init_mpl
 from echo import delay_callback
 from glue.utils import mpl_to_datetime64
 
-__all__ = ['MatplotlibViewerMixin']
+__all__ = ['MatplotlibViewerMixin', 'SimpleMatplotlibViewer']
 
 SCRIPT_HEADER = """
 # Initialize figure
@@ -352,3 +353,11 @@ def _script_legend(self):
         if not self.state.legend.visible:
             legend_str = indent(legend_str, "# ")
         return [], legend_str
+
+
+class SimpleMatplotlibViewer(MatplotlibViewerMixin, Viewer):
+
+    def __init__(self, session, parent=None, wcs=None, state=None, projection=None):
+        super().__init__(session, state=state)
+        self.figure, self.axes = init_mpl(wcs=wcs, projection=projection)
+        MatplotlibViewerMixin.setup_callbacks(self)

glue/viewers/profile/tests/test_viewer.py

@@ -0,0 +1,27 @@
+from glue.tests.visual.helpers import visual_test
+from glue.viewers.profile.viewer import SimpleProfileViewer
+from glue.core.application_base import Application
+from glue.core.data import Data
+
+
+@visual_test
+def test_simple_viewer():
+
+    # Make sure the simple viewer can be instantiated
+
+    data1 = Data(x=[1, 2, 3], label='data1')
+    data2 = Data(y=[1, 2, 3], label='data2')
+
+    app = Application()
+    app.data_collection.append(data1)
+    app.data_collection.append(data2)
+
+    viewer = app.new_data_viewer(SimpleProfileViewer)
+    viewer.add_data(data1)
+    viewer.add_data(data2)
+
+    app.data_collection.new_subset_group(label='subset1', subset_state=data1.pixel_component_ids[0] > 0.8)
+
+    viewer.state.layers[2].linewidth = 5
+
+    return viewer.figure

glue/viewers/profile/viewer.py

@@ -3,7 +3,11 @@
 from glue.core.units import UnitConverter
 from glue.core.subset import roi_to_subset_state
 
-__all__ = ['MatplotlibProfileMixin']
+from glue.viewers.matplotlib.viewer import SimpleMatplotlibViewer
+from glue.viewers.profile.state import ProfileViewerState
+from glue.viewers.profile.layer_artist import ProfileLayerArtist
+
+__all__ = ['MatplotlibProfileMixin', 'SimpleProfileViewer']
 
 
 class MatplotlibProfileMixin(object):
@@ -55,3 +59,14 @@
 
         subset_state = roi_to_subset_state(roi, x_att=self.state.x_att)
         self.apply_subset_state(subset_state, override_mode=override_mode)
+
+
+class SimpleProfileViewer(MatplotlibProfileMixin, SimpleMatplotlibViewer):
+
+    _state_cls = ProfileViewerState
+    _data_artist_cls = ProfileLayerArtist
+    _subset_artist_cls = ProfileLayerArtist
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        MatplotlibProfileMixin.setup_callbacks(self)