244 lines
8.3 KiB
Python
244 lines
8.3 KiB
Python
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'''
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Showcase of Kivy Features
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=========================
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This showcases many features of Kivy. You should see a
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menu bar across the top with a demonstration area below. The
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first demonstration is the accordion layout. You can see, but not
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edit, the kv language code for any screen by pressing the bug or
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'show source' icon. Scroll through the demonstrations using the
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left and right icons in the top right or selecting from the menu
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bar.
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The file showcase.kv describes the main container, while each demonstration
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pane is described in a separate .kv file in the data/screens directory.
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The image data/background.png provides the gradient background while the
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icons in data/icon directory are used in the control bar. The file
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data/faust_github.jpg is used in the Scatter pane. The icons are
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from `http://www.gentleface.com/free_icon_set.html` and licensed as
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Creative Commons - Attribution and Non-commercial Use Only; they
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sell a commercial license.
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The file android.txt is used to package the application for use with the
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Kivy Launcher Android application. For Android devices, you can
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copy/paste this directory into /sdcard/kivy/showcase on your Android device.
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'''
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from time import time
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from kivy.app import App
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from os.path import dirname, join
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from kivy.lang import Builder
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from kivy.properties import (
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NumericProperty,
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StringProperty,
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BooleanProperty,
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ListProperty,
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)
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from kivy.clock import Clock
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from kivy.animation import Animation
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from kivy.uix.screenmanager import Screen
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class ShowcaseScreen(Screen):
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fullscreen = BooleanProperty(False)
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def add_widget(self, *args, **kwargs):
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if 'content' in self.ids:
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return self.ids.content.add_widget(*args, **kwargs)
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return super(ShowcaseScreen, self).add_widget(*args, **kwargs)
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class ShowcaseApp(App):
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index = NumericProperty(-1)
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current_title = StringProperty()
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time = NumericProperty(0)
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show_sourcecode = BooleanProperty(False)
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sourcecode = StringProperty()
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screen_names = ListProperty([])
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hierarchy = ListProperty([])
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def build(self):
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self.title = 'hello world'
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Clock.schedule_interval(self._update_clock, 1 / 60.)
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self.screens = {}
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self.available_screens = sorted([
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'Buttons', 'ToggleButton', 'Sliders', 'ProgressBar', 'Switches',
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'CheckBoxes', 'TextInputs', 'Accordions', 'FileChoosers',
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'Carousel', 'Bubbles', 'CodeInput', 'DropDown', 'Spinner',
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'Scatter', 'Splitter', 'TabbedPanel + Layouts', 'RstDocument',
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'Popups', 'ScreenManager'])
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self.screen_names = self.available_screens
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curdir = dirname(__file__)
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self.available_screens = [join(curdir, 'data', 'screens',
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'{}.kv'.format(fn).lower()) for fn in self.available_screens]
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self.go_next_screen()
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def on_pause(self):
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return True
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def on_resume(self):
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pass
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def on_current_title(self, instance, value):
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self.root.ids.spnr.text = value
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def go_previous_screen(self):
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self.index = (self.index - 1) % len(self.available_screens)
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screen = self.load_screen(self.index)
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sm = self.root.ids.sm
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sm.switch_to(screen, direction='right')
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self.current_title = screen.name
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self.update_sourcecode()
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def go_next_screen(self):
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self.index = (self.index + 1) % len(self.available_screens)
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screen = self.load_screen(self.index)
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sm = self.root.ids.sm
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sm.switch_to(screen, direction='left')
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self.current_title = screen.name
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self.update_sourcecode()
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def go_screen(self, idx):
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self.index = idx
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self.root.ids.sm.switch_to(self.load_screen(idx), direction='left')
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self.update_sourcecode()
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def go_hierarchy_previous(self):
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ahr = self.hierarchy
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if len(ahr) == 1:
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return
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if ahr:
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ahr.pop()
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if ahr:
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idx = ahr.pop()
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self.go_screen(idx)
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def load_screen(self, index):
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if index in self.screens:
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return self.screens[index]
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screen = Builder.load_file(self.available_screens[index])
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self.screens[index] = screen
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return screen
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def read_sourcecode(self):
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fn = self.available_screens[self.index]
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with open(fn) as fd:
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return fd.read()
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def toggle_source_code(self):
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self.show_sourcecode = not self.show_sourcecode
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if self.show_sourcecode:
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height = self.root.height * .3
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else:
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height = 0
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Animation(height=height, d=.3, t='out_quart').start(
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self.root.ids.sv)
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self.update_sourcecode()
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def update_sourcecode(self):
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if not self.show_sourcecode:
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self.root.ids.sourcecode.focus = False
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return
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self.root.ids.sourcecode.text = self.read_sourcecode()
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self.root.ids.sv.scroll_y = 1
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def showcase_floatlayout(self, layout):
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def add_button(*t):
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if not layout.get_parent_window():
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return
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if len(layout.children) > 5:
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layout.clear_widgets()
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layout.add_widget(Builder.load_string('''
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#:import random random.random
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Button:
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size_hint: random(), random()
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pos_hint: {'x': random(), 'y': random()}
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text:
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'size_hint x: {} y: {}\\n pos_hint x: {} y: {}'.format(\
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self.size_hint_x, self.size_hint_y, self.pos_hint['x'],\
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self.pos_hint['y'])
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'''))
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Clock.schedule_once(add_button, 1)
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Clock.schedule_once(add_button)
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def showcase_boxlayout(self, layout):
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def add_button(*t):
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if not layout.get_parent_window():
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return
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if len(layout.children) > 5:
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layout.orientation = 'vertical'\
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if layout.orientation == 'horizontal' else 'horizontal'
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layout.clear_widgets()
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layout.add_widget(Builder.load_string('''
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Button:
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text: self.parent.orientation if self.parent else ''
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'''))
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Clock.schedule_once(add_button, 1)
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Clock.schedule_once(add_button)
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def showcase_gridlayout(self, layout):
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def add_button(*t):
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if not layout.get_parent_window():
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return
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if len(layout.children) > 15:
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layout.rows = 3 if layout.rows is None else None
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layout.cols = None if layout.rows == 3 else 3
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layout.clear_widgets()
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layout.add_widget(Builder.load_string('''
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Button:
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text:
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'rows: {}\\ncols: {}'.format(self.parent.rows, self.parent.cols)\
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if self.parent else ''
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'''))
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Clock.schedule_once(add_button, 1)
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Clock.schedule_once(add_button)
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def showcase_stacklayout(self, layout):
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orientations = ('lr-tb', 'tb-lr',
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'rl-tb', 'tb-rl',
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'lr-bt', 'bt-lr',
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'rl-bt', 'bt-rl')
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def add_button(*t):
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if not layout.get_parent_window():
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return
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if len(layout.children) > 11:
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layout.clear_widgets()
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cur_orientation = orientations.index(layout.orientation)
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layout.orientation = orientations[cur_orientation - 1]
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layout.add_widget(Builder.load_string('''
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Button:
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text: self.parent.orientation if self.parent else ''
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size_hint: .2, .2
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'''))
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Clock.schedule_once(add_button, 1)
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Clock.schedule_once(add_button)
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def showcase_anchorlayout(self, layout):
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def change_anchor(self, *l):
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if not layout.get_parent_window():
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return
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anchor_x = ('left', 'center', 'right')
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anchor_y = ('top', 'center', 'bottom')
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if layout.anchor_x == 'left':
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layout.anchor_y = anchor_y[anchor_y.index(layout.anchor_y) - 1]
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layout.anchor_x = anchor_x[anchor_x.index(layout.anchor_x) - 1]
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Clock.schedule_once(change_anchor, 1)
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Clock.schedule_once(change_anchor, 1)
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def _update_clock(self, dt):
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self.time = time()
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if __name__ == '__main__':
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ShowcaseApp().run()
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