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# SPDX-License-Identifier: GPL-3.0-or-later
# Copyright 2016-2020 by Nathan Lovato, Daniel Oakey, Razvan Radulescu, and contributors
# This file is part of Power Sequencer.
import bpy
from bpy.app.handlers import persistent
@persistent
def power_sequencer_load_file_post(arg):
"""
Called after loading the blend file
"""
for scene in bpy.data.scenes:
scene.power_sequencer.frame_pre = bpy.context.scene.frame_current
@persistent
def power_sequencer_playback_speed_post(scene):
"""
Handler function for faster playback
Skips keyframes after a frame change based on the playback_speed value
It steps over frame rather than increase the playback speed smoothly,
but it's still useful for faster editing
"""
if bpy.context.screen and not bpy.context.screen.is_animation_playing:
return
playback_speed = scene.power_sequencer.playback_speed
frame_start = scene.frame_current
frame_post = scene.frame_current
if playback_speed == "FAST" and frame_start % 3 == 0:
frame_post += 1
elif playback_speed == "FASTER" and frame_start % 2 == 0:
frame_post += 1
elif playback_speed == "DOUBLE":
# 2.5x -> skip 5 frames for 2. 2 then 3 then 2 etc.
frame_post += 1
elif playback_speed == "TRIPLE":
frame_post += 2
if frame_start != frame_post:
bpy.ops.screen.frame_offset(delta=frame_post - frame_start)
scene.power_sequencer.frame_pre = scene.frame_current
def draw_playback_speed(self, context):
layout = self.layout
scene = context.scene
layout.prop(scene.power_sequencer, "playback_speed")
def draw_ui_menu(self, context):
layout = self.layout
layout.menu("POWER_SEQUENCER_MT_main")
def register_handlers():
# Menus
bpy.types.SEQUENCER_HT_header.append(draw_ui_menu)
bpy.types.SEQUENCER_HT_header.append(draw_playback_speed)
# Handlers
bpy.app.handlers.load_post.append(power_sequencer_load_file_post)
bpy.app.handlers.frame_change_post.append(power_sequencer_playback_speed_post)
def unregister_handlers():
# Menus
bpy.types.SEQUENCER_HT_header.remove(draw_ui_menu)
bpy.types.SEQUENCER_HT_header.remove(draw_playback_speed)
# Handlers
bpy.app.handlers.load_post.remove(power_sequencer_load_file_post)
bpy.app.handlers.frame_change_post.remove(power_sequencer_playback_speed_post)
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