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Code

Scroll status list when bottom is reached

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This commit is contained in:
Ivan Habunek 2018-01-05 17:33:06 +01:00
parent 923ac57811
commit a2d59cdab4
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GPG Key ID: CDBD63C43A30BB95
1 changed files with 49 additions and 14 deletions
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63
toot/app.py
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@ -36,6 +36,7 @@ class TimelineApp:
self.statuses = []
self.selected = None
self.stdscr = None
self.scroll_pos = 0
def run(self):
curses.wrapper(self._wrapped_run)
@ -89,6 +90,22 @@ class TimelineApp:
self.setup_windows()
self.full_redraw()
def scroll_to(self, index):
self.scroll_pos = index
height, width = self.stdscr.getmaxyx()
self.left.refresh(3 * index, 0, 2, 0, height - 4, self.left_width)
def scroll_up(self):
if self.scroll_pos > 0:
self.scroll_to(self.scroll_pos - 1)
def scroll_down(self):
self.scroll_to(self.scroll_pos + 1)
def scroll_refresh(self):
self.scroll_to(self.scroll_pos)
def select_previous(self):
"""Move to the previous status in the timeline."""
self.clear_bottom_message()
@ -103,10 +120,17 @@ class TimelineApp:
self.selected = new_index
self.redraw_after_selection_change(old_index, new_index)
# Scroll if required
if new_index < self.scroll_pos:
self.scroll_up()
else:
self.scroll_refresh()
def select_next(self):
"""Move to the next status in the timeline."""
self.clear_bottom_message()
# Load more statuses if no more are available
if self.selected + 1 >= len(self.statuses):
self.fetch_next()
self.draw_statuses(self.left, self.selected + 1)
@ -118,13 +142,24 @@ class TimelineApp:
self.selected = new_index
self.redraw_after_selection_change(old_index, new_index)
# Scroll if required
if new_index >= self.scroll_pos + self.get_page_size():
self.scroll_down()
else:
self.scroll_refresh()
def get_page_size(self):
"""Calculate how many statuses fit on one page (3 lines per status)"""
height = self.right.getmaxyx()[0] - 2 # window height - borders
return height // 3
def redraw_after_selection_change(self, old_index, new_index):
old_status = self.statuses[old_index]
new_status = self.statuses[new_index]
# Perform a partial redraw
self.draw_status_row(self.left, old_status, 3 * old_index - 1, False)
self.draw_status_row(self.left, new_status, 3 * new_index - 1, True)
self.draw_status_row(self.left, old_status, old_index, False)
self.draw_status_row(self.left, new_status, new_index, True)
self.draw_status_details(self.right, new_status)
self.draw_bottom_status()
@ -160,8 +195,7 @@ class TimelineApp:
self.draw_usage(self.bottom)
self.draw_bottom_status()
screen_height, screen_width = self.stdscr.getmaxyx()
self.left.refresh(0, 0, 2, 0, screen_height - 3, self.left_width)
self.scroll_refresh()
self.right.refresh()
self.top.refresh()
@ -185,21 +219,23 @@ class TimelineApp:
if len(self.statuses) > self.selected:
return self.statuses[self.selected]
def draw_status_row(self, window, status, offset, highlight=False):
def draw_status_row(self, window, status, index, highlight=False):
offset = 3 * index
height, width = window.getmaxyx()
color = Color.BLUE if highlight else 0
date, time = status['created_at']
window.addstr(offset + 2, 2, date, color)
window.addstr(offset + 3, 2, time, color)
window.addstr(offset + 1, 2, date, color)
window.addstr(offset + 2, 2, time, color)
trunc_width = width - 16
acct = trunc(status['account']['acct'], trunc_width)
display_name = trunc(status['account']['display_name'], trunc_width)
acct = trunc(status['account']['acct'], trunc_width).ljust(trunc_width)
display_name = trunc(status['account']['display_name'], trunc_width).ljust(trunc_width)
window.addstr(offset + 2, 14, acct, color)
window.addstr(offset + 3, 14, display_name, color)
window.addstr(offset + 4, 1, '─' * (width - 2))
window.addstr(offset + 1, 14, acct, color)
window.addstr(offset + 2, 14, display_name, color)
window.addstr(offset + 3, 1, '─' * (width - 2))
screen_height, screen_width = self.stdscr.getmaxyx()
window.refresh(0, 0, 2, 0, screen_height - 4, self.left_width)
@ -214,9 +250,8 @@ class TimelineApp:
for index, status in enumerate(self.statuses):
if index >= starting:
offset = 3 * index - 1
highlight = self.selected == index
self.draw_status_row(window, status, offset, highlight)
self.draw_status_row(window, status, index, highlight)
def draw_status_details(self, window, status):
window.erase()