300 lines
9.8 KiB
Python
300 lines
9.8 KiB
Python
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'''
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JoyCursor
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=========
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.. versionadded:: 1.10.0
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The JoyCursor is a tool for navigating with a joystick as if using a mouse
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or touch. Most of the actions that are possible for a mouse user are available
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in this module.
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For example:
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* left click
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* right click
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* double click (two clicks)
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* moving the cursor
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* holding the button (+ moving at the same time)
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* selecting
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* scrolling
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There are some properties that can be edited live, such as intensity of the
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JoyCursor movement and toggling mouse button holding.
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Usage
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-----
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For normal module usage, please see the :mod:`~kivy.modules` documentation
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and these bindings:
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+------------------+--------------------+
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| Event | Joystick |
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+==================+====================+
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| cursor move | Axis 3, Axis 4 |
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+------------------+--------------------+
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| cursor intensity | Button 0, Button 1 |
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+------------------+--------------------+
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| left click | Button 2 |
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+------------------+--------------------+
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| right click | Button 3 |
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+------------------+--------------------+
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| scroll up | Button 4 |
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+------------------+--------------------+
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| scroll down | Button 5 |
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+------------------+--------------------+
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| hold button | Button 6 |
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+------------------+--------------------+
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| joycursor on/off | Button 7 |
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+------------------+--------------------+
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The JoyCursor, like Inspector, can also be imported and used as a normal
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python module. This has the added advantage of being able to activate and
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deactivate the module programmatically::
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from kivy.lang import Builder
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from kivy.base import runTouchApp
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runTouchApp(Builder.load_string("""
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#:import jc kivy.modules.joycursor
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BoxLayout:
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Button:
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text: 'Press & activate with Ctrl+E or Button 7'
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on_release: jc.create_joycursor(root.parent, root)
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Button:
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text: 'Disable'
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on_release: jc.stop(root.parent, root)
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"""))
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'''
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__all__ = ('start', 'stop', 'create_joycursor')
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from kivy.clock import Clock
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from kivy.logger import Logger
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from kivy.uix.widget import Widget
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from kivy.graphics import Color, Line
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from kivy.properties import (
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ObjectProperty,
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NumericProperty,
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BooleanProperty
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)
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class JoyCursor(Widget):
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win = ObjectProperty()
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activated = BooleanProperty(False)
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cursor_width = NumericProperty(1.1)
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cursor_hold = BooleanProperty(False)
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intensity = NumericProperty(4)
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dead_zone = NumericProperty(10000)
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offset_x = NumericProperty(0)
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offset_y = NumericProperty(0)
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def __init__(self, **kwargs):
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super(JoyCursor, self).__init__(**kwargs)
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self.avoid_bring_to_top = False
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self.size_hint = (None, None)
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self.size = (21, 21)
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self.set_cursor()
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# draw cursor
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with self.canvas:
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Color(rgba=(0.19, 0.64, 0.81, 0.5))
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self.cursor_ox = Line(
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points=self.cursor_pts[:4],
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width=self.cursor_width + 0.1
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)
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self.cursor_oy = Line(
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points=self.cursor_pts[4:],
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width=self.cursor_width + 0.1
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)
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Color(rgba=(1, 1, 1, 0.5))
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self.cursor_x = Line(
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points=self.cursor_pts[:4],
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width=self.cursor_width
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)
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self.cursor_y = Line(
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points=self.cursor_pts[4:],
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width=self.cursor_width
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)
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self.pos = [-i for i in self.size]
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def on_window_children(self, win, *args):
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# pull JoyCursor to the front when added
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# as a child directly to the window.
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if self.avoid_bring_to_top or not self.activated:
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return
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self.avoid_bring_to_top = True
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win.remove_widget(self)
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win.add_widget(self)
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self.avoid_bring_to_top = False
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def on_activated(self, instance, activated):
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# bind/unbind when JoyCursor's state is changed
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if activated:
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self.win.add_widget(self)
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self.move = Clock.schedule_interval(self.move_cursor, 0)
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self.win.fbind('on_joy_axis', self.check_cursor)
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self.win.fbind('on_joy_button_down', self.set_intensity)
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self.win.fbind('on_joy_button_down', self.check_dispatch)
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self.win.fbind('mouse_pos', self.stop_cursor)
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mouse_pos = self.win.mouse_pos
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self.pos = (
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mouse_pos[0] - self.size[0] / 2.0,
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mouse_pos[1] - self.size[1] / 2.0
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)
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Logger.info('JoyCursor: joycursor activated')
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else:
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self.pos = [-i for i in self.size]
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Clock.unschedule(self.move)
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self.win.funbind('on_joy_axis', self.check_cursor)
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self.win.funbind('on_joy_button_down', self.set_intensity)
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self.win.funbind('on_joy_button_down', self.check_dispatch)
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self.win.funbind('mouse_pos', self.stop_cursor)
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self.win.remove_widget(self)
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Logger.info('JoyCursor: joycursor deactivated')
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def set_cursor(self, *args):
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# create cursor points
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px, py = self.pos
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sx, sy = self.size
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self.cursor_pts = [
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px, py + round(sy / 2.0), px + sx, py + round(sy / 2.0),
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px + round(sx / 2.0), py, px + round(sx / 2.0), py + sy
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]
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def check_cursor(self, win, stickid, axisid, value):
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# check axes and set offset if a movement is registered
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intensity = self.intensity
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dead = self.dead_zone
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if axisid == 3:
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if value < -dead:
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self.offset_x = -intensity
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elif value > dead:
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self.offset_x = intensity
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else:
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self.offset_x = 0
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elif axisid == 4:
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# invert Y axis to behave like mouse
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if value < -dead:
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self.offset_y = intensity
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elif value > dead:
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self.offset_y = -intensity
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else:
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self.offset_y = 0
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else:
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self.offset_x = 0
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self.offset_y = 0
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def set_intensity(self, win, stickid, buttonid):
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# set intensity of joycursor with joystick buttons
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intensity = self.intensity
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if buttonid == 0 and intensity > 2:
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intensity -= 1
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elif buttonid == 1:
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intensity += 1
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self.intensity = intensity
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def check_dispatch(self, win, stickid, buttonid):
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if buttonid == 6:
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self.cursor_hold = not self.cursor_hold
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if buttonid not in (2, 3, 4, 5, 6):
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return
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x, y = self.center
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# window event, correction necessary
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y = self.win.system_size[1] - y
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modifiers = []
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actions = {
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2: 'left',
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3: 'right',
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4: 'scrollup',
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5: 'scrolldown',
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6: 'left'
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}
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button = actions[buttonid]
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self.win.dispatch('on_mouse_down', x, y, button, modifiers)
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if not self.cursor_hold:
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self.win.dispatch('on_mouse_up', x, y, button, modifiers)
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def move_cursor(self, *args):
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# move joycursor as a mouse
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self.pos[0] += self.offset_x
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self.pos[1] += self.offset_y
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modifiers = []
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if self.cursor_hold:
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self.win.dispatch(
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'on_mouse_move',
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self.center[0],
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self.win.system_size[1] - self.center[1],
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modifiers
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)
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def stop_cursor(self, instance, mouse_pos):
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# pin the cursor to the mouse pos
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self.offset_x = 0
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self.offset_y = 0
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self.pos = (
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mouse_pos[0] - self.size[0] / 2.0,
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mouse_pos[1] - self.size[1] / 2.0
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)
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def on_pos(self, instance, new_pos):
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self.set_cursor()
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self.cursor_x.points = self.cursor_pts[:4]
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self.cursor_y.points = self.cursor_pts[4:]
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self.cursor_ox.points = self.cursor_pts[:4]
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self.cursor_oy.points = self.cursor_pts[4:]
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def keyboard_shortcuts(self, win, scancode, *args):
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modifiers = args[-1]
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if scancode == 101 and modifiers == ['ctrl']:
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self.activated = not self.activated
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return True
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elif scancode == 27:
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if self.activated:
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self.activated = False
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return True
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def joystick_shortcuts(self, win, stickid, buttonid):
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if buttonid == 7:
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self.activated = not self.activated
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if self.activated:
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self.pos = [round(i / 2.0) for i in win.size]
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def create_joycursor(win, ctx, *args):
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'''Create a JoyCursor instance attached to the *ctx* and bound to the
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Window's :meth:`~kivy.core.window.WindowBase.on_keyboard` event for
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capturing the keyboard shortcuts.
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:Parameters:
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`win`: A :class:`Window <kivy.core.window.WindowBase>`
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The application Window to bind to.
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`ctx`: A :class:`~kivy.uix.widget.Widget` or subclass
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The Widget for JoyCursor to attach to.
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'''
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ctx.joycursor = JoyCursor(win=win)
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win.bind(children=ctx.joycursor.on_window_children,
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on_keyboard=ctx.joycursor.keyboard_shortcuts)
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# always listen for joystick input to open the module
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# (like a keyboard listener)
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win.fbind('on_joy_button_down', ctx.joycursor.joystick_shortcuts)
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def start(win, ctx):
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Clock.schedule_once(lambda *t: create_joycursor(win, ctx))
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def stop(win, ctx):
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'''Stop and unload any active JoyCursors for the given *ctx*.
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'''
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if hasattr(ctx, 'joycursor'):
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ctx.joycursor.activated = False
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win.unbind(children=ctx.joycursor.on_window_children,
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on_keyboard=ctx.joycursor.keyboard_shortcuts)
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win.funbind('on_joy_button_down', ctx.joycursor.joystick_shortcuts)
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win.remove_widget(ctx.joycursor)
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del ctx.joycursor
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