def on_touch(self, xy, action):
handle_size = self.get_handle_size()
if action == "down":
handle_pos = _topleft_from_aligned_xy(self.get_handle_position(), "center", handle_size, self.parent.size)
handle_rect = pygame.Rect(handle_pos, handle_size)
if handle_rect.collidepoint(xy):
self.pressed = True
if action in ("move", "up"):
if self.vertical:
pos = 1.0 - float(xy[1] - handle_size[1] / 2) / (self.size[1] - handle_size[1])
else:
pos = float(xy[0] - handle_size[0] / 2) / (self.size[0] - handle_size[0])
new_pos = self.min_val + pos * (self.max_val - self.min_val)
new_pos = clamp(self.min_val, self.max_val, new_pos)
if self.pressed:
self.value = new_pos
if self.callback:
self.callback(self.value)
self.update()
elif action == "up":
if new_pos > (self.value + self.step):
self.value += self.step
elif new_pos < (self.value - self.step):
self.value -= self.step
else:
self.value = new_pos
if self.callback:
self.callback(self.value)
self.update()
if action in ("up", "drag_up"):
self.pressed = False
if self.release_callback:
self.release_callback(self.value)
def __init__(self, xy, size, align="center", parent=None, style=None):
"""Initialise this widget. It creates it's own subsurface for drawing on
xy, size and align specify the position of the widget
if this widget will live in a sub-container, such as ScrollArea, specify this with parent
otherwise it will be attached to the main screen
xy is relative to the parent widget (or screen)
style is an instance of Style to specify the appearance of the widget
"""
if parent:
self.parent = parent
else:
from .container import get_root_widget
self.parent = get_root_widget()
if style:
self.style = style
else:
self.style = get_default_style()
self.xy = _topleft_from_aligned_xy(xy, align, size, self.parent.size)
self.visible = True
self.init_size = size
self.parent.add_child(self)
def __init__(self, xy, size, align="center", parent=None, style=None):
"""Initialise this widget. It creates it's own subsurface for drawing on
xy, size and align specify the position of the widget
if this widget will live in a sub-container, such as ScrollArea, specify this with parent
otherwise it will be attached to the main screen
xy is relative to the parent widget (or screen)
style is an instance of Style to specify the appearance of the widget
"""
if parent:
self.parent = parent
else:
from .container import get_root_widget
self.parent = get_root_widget()
if style:
self.style = style
else:
self.style = get_default_style()
self.xy = _topleft_from_aligned_xy(xy, align, size, self.parent.size)
self.visible = True
self.init_size = size
self.parent.add_child(self)
def on_touch(self, xy, action):
handle_size = self.get_handle_size()
if action == "down":
handle_pos = _topleft_from_aligned_xy(self.get_handle_position(),
"center", handle_size,
self.parent.size)
handle_rect = pygame.Rect(handle_pos, handle_size)
if handle_rect.collidepoint(xy):
self.pressed = True
if action in ("move", "up"):
if self.vertical:
pos = 1.0 - \
float(xy[1] - handle_size[1] / 2) / (
self.size[1] - handle_size[1])
else:
pos = float(xy[0] - handle_size[0] / 2) / (self.size[0] -
handle_size[0])
new_pos = self.min_val + pos * (self.max_val - self.min_val)
new_pos = clamp(self.min_val, self.max_val, new_pos)
if self.pressed:
self.value = new_pos
if self.callback:
self.callback(self.value)
self.update()
elif action == "up":
if new_pos > (self.value + self.step):
self.value += self.step
elif new_pos < (self.value - self.step):
self.value -= self.step
else:
self.value = new_pos
if self.callback:
self.callback(self.value)
self.update()
if action in ("up", "drag_up"):
self.pressed = False
if self.release_callback:
self.release_callback(self.value)
