example.py

from pyConsole import VerticalSplitScreen
from pyConsole import HorizontalSplitScreen
from pyConsole import VerticalScrollableScreen
from pyConsole import before_enter
from pyConsole import before_exit
from pyConsole import resize
from pyConsole import start
from pyConsole import publish
from pyConsole import subscribe


class Menu(VerticalScrollableScreen):

    def onKeyDown(self, key):
        if self.focus:
            if key == '\n':
                publish('build_screen', self.selected)


class Header(object):

    def __init__(self):
        self.width = 0
        self.height = 0
        self.title = 'static header'

    def onScroll(self, direction):
        pass

    def onKeyDown(self, key):
        pass

    def onResize(self, x, y, w, h):
        self.width = w
        self.height = h
        self.x = x
        self.y = y

    def render(self, canvas, x, y):
        filler = ' ' * self.width
        title = ' ' + self.title
        title = '\033[5;30;47m' + (title + filler[:-len(title)]) + '\033[0m'  # noqa
        canvas.append('\033[{1};{0}H{2}'.format(x, y, title))


class Footer(object):

    def __init__(self):
        self.width = 0
        self.height = 0
        self.title = 'debug '
        self.events = []
        subscribe('event', self.onMessage)

    def onMessage(self, event):
        self.events.append(event)
        if len(self.events) > 10:
            self.events.pop(0)

        publish('repaint')

    def onScroll(self, direction):
        pass

    def onKeyDown(self, key):
        pass

    def onResize(self, x, y, w, h):
        self.width = w
        self.height = h
        self.x = x
        self.y = y

    def render(self, canvas, x, y):
        filler = ' ' * self.width
        title = '\033[7;32m ' + self.title + '\033[0;31m ' + ', '.join(reversed(self.events))  # noqa
        title = title + filler[:-len(title)]
        title = title[:min(self.width, len(title))] + '\033[0m'
        canvas.append('\033[{1};{0}H{2}'.format(x, self.height - 1 + self.y, title))  # noqa


if __name__ == '__main__':
    # screen bleeding and multiline strings test
    # big_data = [' B-{0}'.format('{0}'.format(i % 10) * ((i + 1) % 200)) for i in range(0, 1000, 1)]  # noqa

    # screen buffer seek test
    big_data = [
        {
            'id': 'line_{0}'.format(i + 1),
            'label': 'Line number {0}'.format(i + 1)
        } for i in range(0, 2000, 1)
    ]

    menu_items = [
        {
            'id': 'item_1',
            'label': 'Item 1'
        },
        {
            'id': 'item_2',
            'label': 'Item 2'
        },
        {
            'id': 'item_3',
            'label': 'Item 3'
        },
        {
            'id': 'item_4',
            'label': 'Item 4'
        }
    ]
    header = Header()
    header.height = 2

    footer = Footer()
    footer.height = 2

    left_list = Menu(menu_items)
    left_list.width = 10

    def build_screen(item):
        selected_item = menu_items[next(index for (index, d) in enumerate(menu_items) if d['id'] == item)]  # noqa

        big_data = [
            {
                'id': '{0}_line_{1}'.format(selected_item['id'], i + 1),
                'label': '{0} -> {1}'.format(selected_item['label'], i + 1)
            } for i in range(0, 2000, 1)
        ]
        publish('set_screen', VerticalSplitScreen(
            top=header,
            bottom=VerticalSplitScreen(
                top=HorizontalSplitScreen(
                    left=left_list,
                    right=VerticalScrollableScreen(big_data),
                ),
                bottom=footer
            )
        ))
        resize()

    before_enter()

    subscribe('build_screen', build_screen)

    publish('build_screen', 'item_1')

    start()

    before_exit()