Initial implementation of abstract class

.github/workflows/ci_workflows.yml

@@ -9,48 +9,60 @@ on:
     - cron: '0 5 * * 5'
 
 jobs:
-  pep8:
-    runs-on: ubuntu-16.04
-    steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
-    - name: Set up Python
-      uses: actions/setup-python@v2
-      with:
-        python-version: '3.x'
-    - name: Lint with flake8
-      run: |
-        python -m pip install --upgrade pip flake8
-        flake8 astrowidgets --count
-
   tests:
+    name: ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: true
       matrix:
-        os: [windows-latest, macos-latest, ubuntu-latest]
-    steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
-    - name: Set up Python
-      uses: actions/setup-python@v2
-      with:
-        python-version: '3.8'
-    - name: Install and build
-      run: python -m pip install tox --upgrade
-    - name: Run tests
-      run: tox -e test
+        include:
+
+          - name: Code style checks
+            os: ubuntu-latest
+            python: 3.x
+            toxenv: codestyle
+
+          - name: Python 3.9 with abstract only
+            os: ubuntu-latest
+            python: 3.9
+            toxenv: py39-test
+
+          - name: Python 3.8 with Ginga backend (Linux)
+            os: ubuntu-latest
+            python: 3.8
+            toxenv: py38-test-alldeps
+
+          - name: Python 3.9 with Ginga backend (Windows)
+            os: windows-latest
+            python: 3.9
+            toxenv: py39-test-alldeps
+
+          - name: Python 3.7 with Ginga backend (OSX)
+            os: macos-latest
+            python: 3.7
+            toxenv: py37-test-alldeps
+
+          - name: Python 3.9 with Ginga backend (dev)
+            os: ubuntu-latest
+            python: 3.9
+            toxenv: py39-test-devdeps
+
+          # NOTE: Uncomment when we really support oldest deps
+          #- name: Python 3.6 with Ginga backend (old)
+          #  os: ubuntu-latest
+          #  python: 3.6
+          #  toxenv: py36-test-oldestdeps
 
-  devtests:
-    runs-on: ubuntu-latest
     steps:
     - name: Checkout code
       uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.x'
-    - name: Install and build
-      run: python -m pip install tox --upgrade
+        python-version: ${{ matrix.python }}
+    - name: Install Python dependencies
+      run: python -m pip install --upgrade tox
     - name: Run tests
-      run: tox -e test-devdeps
+      run: tox -e ${{ matrix.toxenv }}

.gitignore

@@ -18,6 +18,7 @@ MANIFEST
 example_notebooks/test.png
 */version.py
 pip-wheel-metadata/
+example_notebooks/ginga/test.png
 
 # Sphinx
 docs/api

.readthedocs.yml

@@ -16,6 +16,7 @@ python:
       path: .
       extra_requirements:
         - docs
+        - ginga
 
 # Don't build any extra formats
 formats: []

README.rst

@@ -14,7 +14,7 @@ Widgets for the Jupyter notebook and JupyterLab
     :alt: Documentation Status
 
 ``astrowidgets`` aims to be a set of astronomy widgets for Jupyter Lab or Notebook,
-leveraging the Astropy ecosystem. The ``ImageWidget`` implements the API documented at
+leveraging the Astropy ecosystem. The ``BaseImageWidget`` implements the API documented at
 `https://github.com/eteq/nb-astroimage-api <https://github.com/eteq/nb-astroimage-api>`_
 
 **Warning**