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globalforest/kivymd/uix/taptargetview.py

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experiment with markers
2020-10-14 00:19:43 -04:00
"""
Components/TapTargetView
========================
.. seealso::
`TapTargetView, GitHub <https://github.com/KeepSafe/TapTargetView>`_
`TapTargetView, Material archive <https://material.io/archive/guidelines/growth-communications/feature-discovery.html#>`_
.. rubric:: Provide value and improve engagement by introducing users to new
features and functionality at relevant moments.
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-previous.gif
:align: center
Usage
-----
.. code-block:: python
from kivy.lang import Builder
from kivymd.app import MDApp
from kivymd.uix.taptargetview import MDTapTargetView
KV = '''
Screen:
MDFloatingActionButton:
id: button
icon: "plus"
pos: 10, 10
on_release: app.tap_target_start()
'''
class TapTargetViewDemo(MDApp):
def build(self):
screen = Builder.load_string(KV)
self.tap_target_view = MDTapTargetView(
widget=screen.ids.button,
title_text="This is an add button",
description_text="This is a description of the button",
widget_position="left_bottom",
)
return screen
def tap_target_start(self):
if self.tap_target_view.state == "close":
self.tap_target_view.start()
else:
self.tap_target_view.stop()
TapTargetViewDemo().run()
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-usage.gif
:align: center
Widget position
---------------
Sets the position of the widget relative to the floating circle.
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="right",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-right.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="left",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-left.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="top",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-top.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="bottom",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-bottom.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="left_top",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-left_top.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="right_top",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-right_top.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="left_bottom",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-left_bottom.png
:align: center
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="right_bottom",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-right_bottom.png
:align: center
If you use ``the widget_position = "center"`` parameter then you must
definitely specify the :attr:`~MDTapTargetView.title_position`.
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
widget_position="center",
title_position="left_top",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-position-center.png
:align: center
Text options
------------
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
title_text="Title text",
description_text="Description text",
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-text.png
:align: center
You can use the following options to control font size, color, and boldness:
- :attr:`~MDTapTargetView.title_text_size`
- :attr:`~MDTapTargetView.title_text_color`
- :attr:`~MDTapTargetView.title_text_bold`
- :attr:`~MDTapTargetView.description_text_size`
- :attr:`~MDTapTargetView.description_text_color`
- :attr:`~MDTapTargetView.description_text_bold`
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
title_text="Title text",
title_text_size="36sp",
description_text="Description text",
description_text_color=[1, 0, 0, 1]
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-text-option.png
:align: center
But you can also use markup to set these values.
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
title_text="[size=36]Title text[/size]",
description_text="[color=#ff0000ff]Description text[/color]",
)
Events control
--------------
.. code-block:: python
self.tap_target_view.bind(on_open=self.on_open, on_close=self.on_close)
.. code-block:: python
def on_open(self, instance_tap_target_view):
'''Called at the time of the start of the widget opening animation.'''
print("Open", instance_tap_target_view)
def on_close(self, instance_tap_target_view):
'''Called at the time of the start of the widget closed animation.'''
print("Close", instance_tap_target_view)
.. Note:: See other parameters in the :class:`~MDTapTargetView` class.
"""
from kivy.animation import Animation
from kivy.event import EventDispatcher
from kivy.graphics import Color, Ellipse, Rectangle
from kivy.logger import Logger
from kivy.metrics import dp
from kivy.properties import (
BooleanProperty,
ListProperty,
NumericProperty,
ObjectProperty,
OptionProperty,
StringProperty,
)
from kivy.uix.label import Label
from kivymd.theming import ThemableBehavior
class MDTapTargetView(ThemableBehavior, EventDispatcher):
"""Rough try to mimic the working of Android's TapTargetView.
:Events:
:attr:`on_open`
Called at the time of the start of the widget opening animation.
:attr:`on_close`
Called at the time of the start of the widget closed animation.
"""
widget = ObjectProperty()
"""
Widget to add ``TapTargetView`` upon.
:attr:`widget` is an :class:`~kivy.properties.ObjectProperty`
and defaults to `None`.
"""
outer_radius = NumericProperty(dp(200))
"""
Radius for outer circle.
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-outer-radius.png
:align: center
:attr:`outer_radius` is an :class:`~kivy.properties.NumericProperty`
and defaults to `dp(200)`.
"""
outer_circle_color = ListProperty()
"""
Color for the outer circle in ``rgb`` format.
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
outer_circle_color=(1, 0, 0)
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-outer-circle-color.png
:align: center
:attr:`outer_circle_color` is an :class:`~kivy.properties.ListProperty`
and defaults to ``theme_cls.primary_color``.
"""
outer_circle_alpha = NumericProperty(0.96)
"""
Alpha value for outer circle.
:attr:`outer_circle_alpha` is an :class:`~kivy.properties.NumericProperty`
and defaults to `0.96`.
"""
target_radius = NumericProperty(dp(45))
"""
Radius for target circle.
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-target-radius.png
:align: center
:attr:`target_radius` is an :class:`~kivy.properties.NumericProperty`
and defaults to `dp(45)`.
"""
target_circle_color = ListProperty([1, 1, 1])
"""
Color for target circle in ``rgb`` format.
.. code-block:: python
self.tap_target_view = MDTapTargetView(
...
target_circle_color=(1, 0, 0)
)
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/tap-target-view-widget-target-circle-color.png
:align: center
:attr:`target_circle_color` is an :class:`~kivy.properties.ListProperty`
and defaults to `[1, 1, 1]`.
"""
title_text = StringProperty()
"""
Title to be shown on the view.
:attr:`title_text` is an :class:`~kivy.properties.StringProperty`
and defaults to `''`.
"""
title_text_size = NumericProperty(dp(25))
"""
Text size for title.
:attr:`title_text_size` is an :class:`~kivy.properties.NumericProperty`
and defaults to `dp(25)`.
"""
title_text_color = ListProperty([1, 1, 1, 1])
"""
Text color for title.
:attr:`title_text_color` is an :class:`~kivy.properties.ListProperty`
and defaults to `[1, 1, 1, 1]`.
"""
title_text_bold = BooleanProperty(True)
"""
Whether title should be bold.
:attr:`title_text_bold` is an :class:`~kivy.properties.BooleanProperty`
and defaults to `True`.
"""
description_text = StringProperty()
"""
Description to be shown below the title (keep it short).
:attr:`description_text` is an :class:`~kivy.properties.StringProperty`
and defaults to `''`.
"""
description_text_size = NumericProperty(dp(20))
"""
Text size for description text.
:attr:`description_text_size` is an :class:`~kivy.properties.NumericProperty`
and defaults to `dp(20)`.
"""
description_text_color = ListProperty([0.9, 0.9, 0.9, 1])
"""
Text size for description text.
:attr:`description_text_color` is an :class:`~kivy.properties.ListProperty`
and defaults to `[0.9, 0.9, 0.9, 1]`.
"""
description_text_bold = BooleanProperty(False)
"""
Whether description should be bold.
:attr:`description_text_bold` is an :class:`~kivy.properties.BooleanProperty`
and defaults to `False`.
"""
draw_shadow = BooleanProperty(False)
"""
Whether to show shadow.
:attr:`draw_shadow` is an :class:`~kivy.properties.BooleanProperty`
and defaults to `False`.
"""
cancelable = BooleanProperty(False)
"""
Whether clicking outside the outer circle dismisses the view.
:attr:`cancelable` is an :class:`~kivy.properties.BooleanProperty`
and defaults to `False`.
"""
widget_position = OptionProperty(
"left",
options=[
"left",
"right",
"top",
"bottom",
"left_top",
"right_top",
"left_bottom",
"right_bottom",
"center",
],
)
"""
Sets the position of the widget on the :attr:`~outer_circle`. Available options are
`'left`', `'right`', `'top`', `'bottom`', `'left_top`', `'right_top`',
`'left_bottom`', `'right_bottom`', `'center`'.
:attr:`widget_position` is an :class:`~kivy.properties.OptionProperty`
and defaults to `'left'`.
"""
title_position = OptionProperty(
"auto",
options=[
"auto",
"left",
"right",
"top",
"bottom",
"left_top",
"right_top",
"left_bottom",
"right_bottom",
],
)
"""
Sets the position of :attr`~title_text` on the outer circle. Only works if
:attr`~widget_position` is set to `'center'`. In all other cases, it
calculates the :attr`~title_position` itself.
Must be set to other than `'auto`' when :attr`~widget_position` is set
to `'center`'.
Available options are `'auto'`, `'left`', `'right`', `'top`', `'bottom`',
`'left_top`', `'right_top`', `'left_bottom`', `'right_bottom`', `'center`'.
:attr:`title_position` is an :class:`~kivy.properties.OptionProperty`
and defaults to `'auto'`.
"""
stop_on_outer_touch = BooleanProperty(False)
"""
Whether clicking on outer circle stops the animation.
:attr:`stop_on_outer_touch` is an :class:`~kivy.properties.BooleanProperty`
and defaults to `False`.
"""
stop_on_target_touch = BooleanProperty(True)
"""
Whether clicking on target circle should stop the animation.
:attr:`stop_on_target_touch` is an :class:`~kivy.properties.BooleanProperty`
and defaults to `True`.
"""
state = OptionProperty("close", options=["close", "open"])
"""
State of :class:`~MDTapTargetView`.
:attr:`state` is an :class:`~kivy.properties.OptionProperty`
and defaults to `'close'`.
"""
_outer_radius = NumericProperty(0)
_target_radius = NumericProperty(0)
def __init__(self, **kwargs):
self.ripple_max_dist = dp(90)
self.on_outer_radius(self, self.outer_radius)
self.on_target_radius(self, self.target_radius)
self.core_title_text = Label(
markup=True, size_hint=(None, None), bold=self.title_text_bold
)
self.core_title_text.bind(
texture_size=self.core_title_text.setter("size")
)
self.core_description_text = Label(markup=True, size_hint=(None, None))
self.core_description_text.bind(
texture_size=self.core_description_text.setter("size")
)
super().__init__(**kwargs)
self.register_event_type("on_outer_touch")
self.register_event_type("on_target_touch")
self.register_event_type("on_outside_click")
self.register_event_type("on_open")
self.register_event_type("on_close")
if not self.outer_circle_color:
self.outer_circle_color = self.theme_cls.primary_color[:-1]
def _initialize(self):
setattr(self.widget, "_outer_radius", 0)
setattr(self.widget, "_target_radius", 0)
setattr(self.widget, "target_ripple_radius", 0)
setattr(self.widget, "target_ripple_alpha", 0)
# Bind some function on widget event when this function is called
# instead of when the class itself is initialized to prevent all
# widgets of all instances to get bind at once and start messing up.
self.widget.bind(on_touch_down=self._some_func)
def _draw_canvas(self):
_pos = self._ttv_pos()
self.widget.canvas.before.clear()
with self.widget.canvas.before:
# Outer circle.
Color(
*self.outer_circle_color,
self.outer_circle_alpha,
group="ttv_group",
)
_rad1 = self.widget._outer_radius
Ellipse(size=(_rad1, _rad1), pos=_pos[0], group="ttv_group")
# Title text.
Color(*self.title_text_color, group="ttv_group")
Rectangle(
size=self.core_title_text.texture.size,
texture=self.core_title_text.texture,
pos=_pos[1],
group="ttv_group",
)
# Description text.
Color(*self.description_text_color, group="ttv_group")
Rectangle(
size=self.core_description_text.texture.size,
texture=self.core_description_text.texture,
pos=(
_pos[1][0],
_pos[1][1] - self.core_description_text.size[1] - 5,
),
group="ttv_group",
)
# Target circle.
Color(*self.target_circle_color, group="ttv_group")
_rad2 = self.widget._target_radius
Ellipse(
size=(_rad2, _rad2),
pos=(
self.widget.x - (_rad2 / 2 - self.widget.size[0] / 2),
self.widget.y - (_rad2 / 2 - self.widget.size[0] / 2),
),
group="ttv_group",
)
# Target ripple.
Color(
*self.target_circle_color,
self.widget.target_ripple_alpha,
group="ttv_group",
)
_rad3 = self.widget.target_ripple_radius
Ellipse(
size=(_rad3, _rad3),
pos=(
self.widget.x - (_rad3 / 2 - self.widget.size[0] / 2),
self.widget.y - (_rad3 / 2 - self.widget.size[0] / 2),
),
group="ttv_group",
)
def stop(self, *args):
"""Starts widget close animation."""
# It needs a better implementation.
self.anim_ripple.unbind(on_complete=self._repeat_ripple)
self.core_title_text.opacity = 0
self.core_description_text.opacity = 0
anim = Animation(
d=0.15,
t="in_cubic",
**dict(
zip(
["_outer_radius", "_target_radius", "target_ripple_radius"],
[0, 0, 0],
)
),
)
anim.bind(on_complete=self._after_stop)
anim.start(self.widget)
def _after_stop(self, *args):
self.widget.canvas.before.remove_group("ttv_group")
args[0].stop_all(self.widget)
elev = getattr(self.widget, "elevation", None)
if elev:
self._fix_elev()
self.dispatch("on_close")
# Don't forget to unbind the function or it'll mess
# up with other next bindings.
self.widget.unbind(on_touch_down=self._some_func)
self.state = "close"
def _fix_elev(self):
with self.widget.canvas.before:
Color(a=self.widget._soft_shadow_a)
Rectangle(
texture=self.widget._soft_shadow_texture,
size=self.widget._soft_shadow_size,
pos=self.widget._soft_shadow_pos,
)
Color(a=self.widget._hard_shadow_a)
Rectangle(
texture=self.widget._hard_shadow_texture,
size=self.widget._hard_shadow_size,
pos=self.widget._hard_shadow_pos,
)
Color(a=1)
def start(self, *args):
"""Starts widget opening animation."""
self._initialize()
self._animate_outer()
self.state = "open"
self.core_title_text.opacity = 1
self.core_description_text.opacity = 1
self.dispatch("on_open")
def _animate_outer(self):
anim = Animation(
d=0.2,
t="out_cubic",
**dict(
zip(
["_outer_radius", "_target_radius"],
[self._outer_radius, self._target_radius],
)
),
)
anim.cancel_all(self.widget)
anim.bind(on_progress=lambda x, y, z: self._draw_canvas())
anim.bind(on_complete=self._animate_ripple)
anim.start(self.widget)
setattr(self.widget, "target_ripple_radius", self._target_radius)
setattr(self.widget, "target_ripple_alpha", 1)
def _animate_ripple(self, *args):
self.anim_ripple = Animation(
d=1,
t="in_cubic",
target_ripple_radius=self._target_radius + self.ripple_max_dist,
target_ripple_alpha=0,
)
self.anim_ripple.stop_all(self.widget)
self.anim_ripple.bind(on_progress=lambda x, y, z: self._draw_canvas())
self.anim_ripple.bind(on_complete=self._repeat_ripple)
self.anim_ripple.start(self.widget)
def _repeat_ripple(self, *args):
setattr(self.widget, "target_ripple_radius", self._target_radius)
setattr(self.widget, "target_ripple_alpha", 1)
self._animate_ripple()
def on_open(self, *args):
"""Called at the time of the start of the widget opening animation."""
def on_close(self, *args):
"""Called at the time of the start of the widget closed animation."""
def on_draw_shadow(self, instance, value):
Logger.warning(
"The shadow adding method will be implemented in future versions"
)
def on_description_text(self, instance, value):
self.core_description_text.text = value
def on_description_text_size(self, instance, value):
self.core_description_text.font_size = value
def on_description_text_bold(self, instance, value):
self.core_description_text.bold = value
def on_title_text(self, instance, value):
self.core_title_text.text = value
def on_title_text_size(self, instance, value):
self.core_title_text.font_size = value
def on_title_text_bold(self, instance, value):
self.core_title_text.bold = value
def on_outer_radius(self, instance, value):
self._outer_radius = self.outer_radius * 2
def on_target_radius(self, instance, value):
self._target_radius = self.target_radius * 2
def on_target_touch(self):
if self.stop_on_target_touch:
self.stop()
def on_outer_touch(self):
if self.stop_on_outer_touch:
self.stop()
def on_outside_click(self):
if self.cancelable:
self.stop()
def _some_func(self, wid, touch):
"""
This function decides which one to dispatch based on the touch
position.
"""
if self._check_pos_target(touch.pos):
self.dispatch("on_target_touch")
elif self._check_pos_outer(touch.pos):
self.dispatch("on_outer_touch")
else:
self.dispatch("on_outside_click")
def _check_pos_outer(self, pos):
"""
Checks if a given `pos` coordinate is within the :attr:`~outer_radius`.
"""
cx = self.circ_pos[0] + self._outer_radius / 2
cy = self.circ_pos[1] + self._outer_radius / 2
r = self._outer_radius / 2
h, k = pos
lhs = (cx - h) ** 2 + (cy - k) ** 2
rhs = r ** 2
if lhs <= rhs:
return True
return False
def _check_pos_target(self, pos):
"""
Checks if a given `pos` coordinate is within the
:attr:`~target_radius`.
"""
cx = self.widget.pos[0] + self.widget.width / 2
cy = self.widget.pos[1] + self.widget.height / 2
r = self._target_radius / 2
h, k = pos
lhs = (cx - h) ** 2 + (cy - k) ** 2
rhs = r ** 2
if lhs <= rhs:
return True
return False
def _ttv_pos(self):
"""
Calculates the `pos` value for outer circle and text
based on the position provided.
:returns: A tuple containing pos for the circle and text.
"""
_rad1 = self.widget._outer_radius
_center_x = self.widget.x - (_rad1 / 2 - self.widget.size[0] / 2)
_center_y = self.widget.y - (_rad1 / 2 - self.widget.size[0] / 2)
if self.widget_position == "left":
circ_pos = (_center_x + _rad1 / 3, _center_y)
title_pos = (_center_x + _rad1 / 1.4, _center_y + _rad1 / 1.4)
elif self.widget_position == "right":
circ_pos = (_center_x - _rad1 / 3, _center_y)
title_pos = (_center_x - _rad1 / 10, _center_y + _rad1 / 1.4)
elif self.widget_position == "top":
circ_pos = (_center_x, _center_y - _rad1 / 3)
title_pos = (_center_x + _rad1 / 4, _center_y + _rad1 / 4)
elif self.widget_position == "bottom":
circ_pos = (_center_x, _center_y + _rad1 / 3)
title_pos = (_center_x + _rad1 / 4, _center_y + _rad1 / 1.2)
# Corner ones need to be at a little smaller distance
# than edge ones that's why _rad1/4.
elif self.widget_position == "left_top":
circ_pos = (_center_x + _rad1 / 4, _center_y - _rad1 / 4)
title_pos = (_center_x + _rad1 / 2, _center_y + _rad1 / 4)
elif self.widget_position == "right_top":
circ_pos = (_center_x - _rad1 / 4, _center_y - _rad1 / 4)
title_pos = (_center_x - _rad1 / 10, _center_y + _rad1 / 4)
elif self.widget_position == "left_bottom":
circ_pos = (_center_x + _rad1 / 4, _center_y + _rad1 / 4)
title_pos = (_center_x + _rad1 / 2, _center_y + _rad1 / 1.2)
elif self.widget_position == "right_bottom":
circ_pos = (_center_x - _rad1 / 4, _center_y + _rad1 / 4)
title_pos = (_center_x, _center_y + _rad1 / 1.2)
else:
# Center.
circ_pos = (_center_x, _center_y)
if self.title_position == "auto":
raise ValueError(
"widget_position='center' requires title_position to be set."
)
elif self.title_position == "left":
title_pos = (_center_x + _rad1 / 10, _center_y + _rad1 / 2)
elif self.title_position == "right":
title_pos = (_center_x + _rad1 / 1.6, _center_y + _rad1 / 2)
elif self.title_position == "top":
title_pos = (_center_x + _rad1 / 2.5, _center_y + _rad1 / 1.3)
elif self.title_position == "bottom":
title_pos = (_center_x + _rad1 / 2.5, _center_y + _rad1 / 4)
elif self.title_position == "left_top":
title_pos = (_center_x + _rad1 / 8, _center_y + _rad1 / 1.4)
elif self.title_position == "right_top":
title_pos = (_center_x + _rad1 / 2, _center_y + _rad1 / 1.3)
elif self.title_position == "left_bottom":
title_pos = (_center_x + _rad1 / 8, _center_y + _rad1 / 4)
elif self.title_position == "right_bottom":
title_pos = (_center_x + _rad1 / 2, _center_y + _rad1 / 3.5)
else:
raise ValueError(
f"'{self.title_position}'"
f"is not a valid value for title_position"
)
self.circ_pos = circ_pos
return circ_pos, title_pos
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