Fixes for projections that don't report axes bounds

correctly (geographic projections).

Author: isaacrobinson2000

matplotview/_view_axes.py

@@ -49,7 +49,12 @@ def draw(self, renderer: RendererBase):
 
         # Check and see if the passed limiting box and extents of the
         # artist intersect, if not don't bother drawing this artist.
-        if(Bbox.intersection(full_extents, self._clip_box) is not None):
+        # First 2 checks are a special case where we received a bad clip box.
+        # (those can happen when we try to get the bounds of a map projection)
+        if(
+            self._clip_box.width == 0 or self._clip_box.height == 0 or
+            Bbox.intersection(full_extents, self._clip_box) is not None
+        ):
             self._artist.draw(self._renderer)
 
         # Re-enable the clip box... and clip path...

matplotview/tests/test_inset_zoom.py

@@ -155,3 +155,29 @@ def test_polar_view(fig_test, fig_ref):
     ax_r1.set_rmax(2)
     ax_r2.plot(theta, r)
     ax_r2.set_rmax(1)
+
+@check_figures_equal()
+def test_map_projection_view(fig_test, fig_ref):
+    x = np.linspace(-2.5, 2.5, 20)
+    y = np.linspace(-1, 1, 20)
+    circ_gen = lambda: plt.Circle((1.5, 0.25), 0.7, ec="black", fc="blue")
+
+    # Test case...
+    ax_t1 = fig_test.add_subplot(1, 2, 1, projection="hammer")
+    ax_t2 = fig_test.add_subplot(1, 2, 2, projection="lambert")
+    ax_t1.grid(True)
+    ax_t2.grid(True)
+    ax_t1.plot(x, y)
+    ax_t1.add_patch(circ_gen())
+    view(ax_t2, ax_t1)
+    ax_t2.set_linescaling(False)
+
+    # Reference...
+    ax_r1 = fig_ref.add_subplot(1, 2, 1, projection="hammer")
+    ax_r2 = fig_ref.add_subplot(1, 2, 2, projection="lambert")
+    ax_r1.grid(True)
+    ax_r2.grid(True)
+    ax_r1.plot(x, y)
+    ax_r1.add_patch(circ_gen())
+    ax_r2.plot(x, y)
+    ax_r2.add_patch(circ_gen())