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Viewer: Fix flick scrolling in flow mode jumping to next chapter. Fixes #1856398 [Unable to scroll on touchscreen in e-book viewer](https://bugs.launchpad.net/calibre/+bug/1856398)

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Kovid Goyal 2019-12-15 10:12:05 +05:30
parent ae3208c606
commit 5bf261244d
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 9 additions and 6 deletions
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7
src/pyj/read_book/flow_mode.pyj
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@ -98,13 +98,15 @@ def flow_onwheel(evt):
dx = (scroll_viewport.width() - 30) * evt.deltaX dx = (scroll_viewport.width() - 30) * evt.deltaX
if dx: if dx:
window.scrollBy(dx, 0) window.scrollBy(dx, 0)
elif dy: elif Math.abs(dy) >= 1:
scroll_by(dy) scroll_by(dy)
smooth_y_data = {'last_event_at':0, 'up': False, 'timer':None, 'source':'wheel', 'pixels_per_ms': 0.2, 'scroll_interval':10, 'stop_scrolling_after':100} smooth_y_data = {'last_event_at':0, 'up': False, 'timer':None, 'source':'wheel', 'pixels_per_ms': 0.2, 'scroll_interval':10, 'stop_scrolling_after':100}
def do_y_scroll(): def do_y_scroll():
if scroll_by((-1 if smooth_y_data.up else 1) * smooth_y_data.pixels_per_ms * smooth_y_data.scroll_interval): dy = (-1 if smooth_y_data.up else 1) * smooth_y_data.pixels_per_ms * smooth_y_data.scroll_interval
if Math.abs(dy) >= 1:
scroll_by(dy)
if Date.now() - smooth_y_data.last_event_at < smooth_y_data.stop_scrolling_after: if Date.now() - smooth_y_data.last_event_at < smooth_y_data.stop_scrolling_after:
smooth_y_data.timer = setTimeout(do_y_scroll, smooth_y_data.scroll_interval) smooth_y_data.timer = setTimeout(do_y_scroll, smooth_y_data.scroll_interval)
@ -218,6 +220,7 @@ def handle_gesture(gesture):
if gesture.type is 'swipe': if gesture.type is 'swipe':
if gesture.points.length > 1 and not gesture.is_held: if gesture.points.length > 1 and not gesture.is_held:
delta = gesture.points[-2] - gesture.points[-1] delta = gesture.points[-2] - gesture.points[-1]
if Math.abs(delta) >= 1:
if gesture.axis is 'vertical': if gesture.axis is 'vertical':
scroll_by(delta) scroll_by(delta)
else: else: