Pygfx histogram v2 (#105)

* First cut: PyGFX histogram

Many things still don't work. But some things do!

* Pure-PyGFX histogram

* Actually use the data maximum for the y-axis tick

Was previously using the bounding box maximum which was the height of
the clims :(

* Add histogram pan/zoom

* Dynamically resize canvas

* Add WxWgpuCanvas

* Update src/ndv/views/_pygfx/_histogram.py

* add basic test

* skip for non qt

* fix wx app reuse

* refactor

* pin numpy too

* skip histogram test on windows 3.12 with pyside/pygfx

* change skip logic

---------

Co-authored-by: Talley Lambert <[email protected]>

pyproject.toml

@@ -54,6 +54,7 @@ pyside = [
     "superqt[iconify,pyside6] >=0.7.1",
     # https://github.com/pyapp-kit/ndv/issues/59
     "pyside6 ==6.6.3; sys_platform == 'win32'",
+    "numpy <2; sys_platform == 'win32'",  # needed for pyside6.6
     "pyside6 >=6.4",
     "qtpy >=2",
 ]

src/ndv/views/_app.py

@@ -127,7 +127,9 @@ def array_canvas_class() -> type[ArrayCanvas]:
 
     @staticmethod
     def histogram_canvas_class() -> type[HistogramCanvas]:
-        raise RuntimeError("Histogram not supported for pygfx")
+        from ndv.views._pygfx._histogram import PyGFXHistogramCanvas
+
+        return PyGFXHistogramCanvas
 
 
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