Move gaphas.view.model to gaphas.model

Now more of Gaphas can be used without depending on Gtk. This is useful for,
for example, the Sphinx extension in Gaphor.

docs/api/model.rst

@@ -7,7 +7,7 @@ Protocols
 
 Although ``gaphas.Canvas`` can be used as a default model, any class that adhere's to the Model protocol can be used as a model.
 
-.. autoclass:: gaphas.view.model.Model
+.. autoclass:: gaphas.model.Model
    :members:
 
 An item should implement these methods, so it can be rendered by the View. Not that painters or tools can require additional methods.

gaphas/canvas.py

@@ -28,17 +28,15 @@ To get connecting items (i.e. all lines connected to a class)::
 from __future__ import annotations
 
 import logging
-from typing import TYPE_CHECKING, Iterable, Protocol
+from typing import Iterable, Protocol
 
 import cairo
 
 from gaphas import matrix, tree
 from gaphas.connections import Connection, Connections
 from gaphas.decorators import nonrecursive
-
-if TYPE_CHECKING:
-    from gaphas.item import Item
-    from gaphas.view.model import View
+from gaphas.item import Item
+from gaphas.model import View
 
 
 def instant_cairo_context():

gaphas/segment.py

@@ -6,10 +6,10 @@ from gi.repository import Gtk
 from gaphas.connector import Handle, LinePort
 from gaphas.geometry import distance_point_point_fast
 from gaphas.item import Line, matrix_i2i
+from gaphas.model import Model
 from gaphas.selection import Selection
 from gaphas.solver import WEAK
 from gaphas.tool.itemtool import Segment
-from gaphas.view.model import Model
 
 
 @Segment.register(Line)  # type: ignore

gaphas/view/__init__.py

@@ -1,4 +1,5 @@
 """This package contains everything to display a Canvas on a screen."""
 
+from gaphas import model
 from gaphas.selection import Selection
 from gaphas.view.gtkview import DEFAULT_CURSOR, GtkView

gaphas/view/gtkview.py

@@ -10,11 +10,11 @@ from gaphas.decorators import g_async
 from gaphas.geometry import Rect, Rectangle
 from gaphas.item import Item
 from gaphas.matrix import Matrix
+from gaphas.model import Model
 from gaphas.painter import DefaultPainter, ItemPainter
 from gaphas.painter.painter import ItemPainterType, Painter
 from gaphas.quadtree import Quadtree, QuadtreeBucket
 from gaphas.selection import Selection
-from gaphas.view.model import Model
 from gaphas.view.scrolling import Scrolling
 
 # Handy debug flag for drawing bounding boxes around the items.
@@ -35,9 +35,8 @@ BOUNDING_BOX_TOLERANCE = 1.0
 
 
 class GtkView(Gtk.DrawingArea, Gtk.Scrollable):
-    """GTK+ widget for rendering a gaphas.view.model.Model to a screen.  The
-    view uses Tools to handle events and Painters to draw. Both are
-    configurable.
+    """GTK+ widget for rendering a gaphas.model.Model to a screen.  The view
+    uses Tools to handle events and Painters to draw. Both are configurable.
 
     The widget already contains adjustment objects (`hadjustment`,
     `vadjustment`) to be used for scrollbars.

tests/test_canvas.py

@@ -6,7 +6,7 @@ from gaphas.connector import ConnectionSink, Connector
 from gaphas.item import Element as Box
 from gaphas.item import Line
 from gaphas.matrix import Matrix
-from gaphas.view.model import Model
+from gaphas.model import Model
 
 
 def test_canvas_is_a_view_model(canvas):