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#file: slider.py
#Copyright (C) 2008 FunnyMan3595
#This file is part of Endgame: Singularity.
#Endgame: Singularity is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2 of the License, or
#(at your option) any later version.
#Endgame: Singularity is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#You should have received a copy of the GNU General Public License
#along with Endgame: Singularity; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#This file contains the slider widget.
import pygame
import constants
import g
import widget
import button
def calc_max(elements, size):
return max(elements - size, 0)
class Slider(button.Button):
slider_color = widget.causes_redraw("_slider_color")
slider_pos = widget.causes_rebuild("_slider_pos")
slider_max = widget.causes_rebuild("_slider_max")
slider_size = widget.causes_rebuild("_slider_size")
horizontal = widget.causes_rebuild("_horizontal")
def __init__(self, parent, pos = (-1,0), size = (-.1, -1),
anchor = constants.TOP_RIGHT, borders = constants.ALL,
border_color=None, background_color=None, slider_color=None,
slider_pos=0, slider_max=10, slider_size=5, horizontal=False,
**kwargs):
kwargs.setdefault("priority", 80)
super(Slider, self).__init__(parent, pos, size, anchor=anchor, **kwargs)
self.borders = borders
self.border_color = border_color or g.colors["white"]
self.background_color = background_color or g.colors["dark_blue"]
self.selected_color = self.background_color
self.unselected_color = self.background_color
self.slider_color = slider_color or g.colors["light_blue"]
self.slider_pos = slider_pos
self.slider_max = slider_max
self.slider_size = slider_size
self.horizontal = horizontal
self.drag_state = None
self.button = button.Button(self, pos = None, size = None,
anchor = constants.TOP_LEFT,
border_color = self.border_color,
selected_color = self.slider_color,
unselected_color = self.slider_color,
priority = self.priority - 5)
def redraw(self):
super(Slider, self).redraw()
self.button.selected_color = self.slider_color
self.button.unselected_color = self.slider_color
def add_hooks(self):
super(Slider, self).add_hooks()
self.parent.add_handler(constants.DRAG, self.handle_drag)
self.parent.add_handler(constants.CLICK, self.handle_click, 50)
def remove_hooks(self):
super(Slider, self).remove_hooks()
self.parent.remove_handler(constants.DRAG, self.handle_drag)
self.parent.remove_handler(constants.CLICK, self.handle_click)
def _calc_length(self, items):
if self.horizontal:
total_length = self.real_size[0] - 2
else:
total_length = self.real_size[1] - 2
return items / float(self.slider_size + self.slider_max)
def rebuild(self):
super(Slider, self).rebuild()
self.needs_resize = True
def resize(self):
super(Slider, self).resize()
bar_start = self._calc_length(self.slider_pos)
bar_length = self._calc_length(self.slider_size)
if self.horizontal:
self.button.pos = (-bar_start, 0)
self.button.size = (-bar_length, -1)
borders = [constants.TOP, constants.BOTTOM]
self.button.resize()
real_pos = self.button.real_pos[0]
real_size = self.button.real_size[0]
if real_pos == 0:
borders.append(constants.LEFT)
if real_pos + real_size == self.real_size[0]:
borders.append(constants.RIGHT)
self.button.borders = tuple(borders)
else:
self.button.pos = (0, -bar_start)
self.button.size = (-1, -bar_length)
borders = [constants.LEFT, constants.RIGHT]
self.button.resize()
real_pos = self.button.real_pos[1]
real_size = self.button.real_size[1]
if real_pos == 0:
borders.append(constants.TOP)
if real_pos + real_size == self.real_size[1]:
borders.append(constants.BOTTOM)
self.button.borders = tuple(borders)
def handle_drag(self, event):
if not self.visible:
return
if self.drag_state == None:
self.start_pos = tuple(event.pos[i]-event.rel[i] for i in range(2))
self.start_slider_pos = self.slider_pos
if self.button.is_over(self.start_pos):
self.drag_state = True
else:
self.drag_state = False
if self.drag_state == True:
if self.horizontal:
dir = 0
else:
dir = 1
mouse_pos = pygame.mouse.get_pos()
rel = mouse_pos[dir] - self.start_pos[dir]
unit = self._calc_length(1) * self.real_size[dir]
movement = int( ( rel + (unit / 2.) ) // unit )
new_pos = self.safe_pos(self.start_slider_pos + movement)
self.slider_pos = new_pos
raise constants.Handled
def safe_pos(self, value):
return max(0, min(self.slider_max, value))
def handle_click(self, event):
if self.drag_state == True:
self.drag_state = None
if not self.is_over(pygame.mouse.get_pos()):
raise constants.Handled
else:
self.drag_state = None
def jump(self, go_lower, big_jump=False, tiny_jump=False):
if big_jump:
jump_dist = max(1, self.slider_max // 2)
elif tiny_jump:
jump_dist = max(1, self.slider_max // 100)
else:
jump_dist = max(1, self.slider_size - 1)
if go_lower:
self.slider_pos = self.safe_pos(self.slider_pos - jump_dist)
else:
self.slider_pos = self.safe_pos(self.slider_pos + jump_dist)
def activated(self, event):
assert event.type == pygame.MOUSEBUTTONUP
if self.horizontal:
self.jump(go_lower=(event.pos[0] < self.button.collision_rect[0]))
else:
self.jump(go_lower = event.pos[1] < self.button.collision_rect[1])
raise constants.Handled
class UpdateSlider(Slider):
def _on_slider_move(self):
self.update_func(self.slider_pos)
_slider_pos = widget.call_on_change("__slider_pos", _on_slider_move)
def __init__(self, *args, **kwargs):
self.update_func = kwargs.pop("update_func", lambda value: None)
super(UpdateSlider, self).__init__(*args, **kwargs)
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