Ajout du GUI

kivy/modules/cursor.py

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+'''
+Cursor
+======
+
+Shows a cursor following mouse motion events, useful on systems with no
+visible native mouse cursor.
+
+Configuration
+-------------
+
+:Parameters:
+    `texture`: str, defaults to
+        'data/images/cursor.png' Image used to represent the cursor if
+        displayed
+    `size`: tuple, defaults to (40, 40)
+        Apparent size of the mouse cursor, if displayed, (None,None) value
+        will keep its real size.
+    `offset`: tuple, defaults to (None, None)
+        Offset of the texture image. The default value will align the
+        top-left corner of the image to the mouse pos.
+
+Example
+-------
+
+In your configuration (`~/.kivy/config.ini`), you can add something like
+this::
+
+    [modules]
+    cursor = texture=mypointer.png,size=20x20,offset=20x20
+
+.. versionadded:: 1.10.0
+'''
+
+__all__ = ('start', 'stop')
+
+from kivy.core.image import Image
+from kivy.graphics import Color, Rectangle
+from kivy import kivy_data_dir
+from kivy.compat import string_types
+from os.path import join
+from functools import partial
+
+
+def _mouse_move(texture, size, offset, win, pos, *args):
+    if hasattr(win, '_cursor'):
+        c = win._cursor
+    else:
+        with win.canvas.after:
+            Color(1, 1, 1, 1, mode='rgba')
+            win._cursor = c = Rectangle(texture=texture, size=size)
+
+    c.pos = pos[0] + offset[0], pos[1] - size[1] + offset[1]
+
+
+def start(win, ctx):
+    cursor_texture = Image(
+        ctx.config.get('texture', join(kivy_data_dir, 'images', 'cursor.png'))
+    ).texture
+    cursor_size = ctx.config.get('size')
+    if isinstance(cursor_size, string_types):
+        cursor_size = [int(x) for x in cursor_size.split('x')]
+    elif not cursor_size:
+        cursor_size = cursor_texture.size
+
+    cursor_offset = ctx.config.get('offset', (0, 0))
+    if isinstance(cursor_offset, string_types):
+        cursor_offset = [int(x) for x in cursor_offset.split('x')]
+
+    win.bind(
+        mouse_pos=partial(
+            _mouse_move, cursor_texture, cursor_size, cursor_offset))
+
+
+def stop(win, ctx):
+    win.unbind(mouse_pos=_mouse_move)