Add the VSE addon Power Sequencer

1 files changed, 89 insertions, 0 deletions

diff --git a/power_sequencer/handlers.py b/power_sequencer/handlers.py
new file mode 100644
index 00000000..8e93bb27
--- /dev/null
+++ b/power_sequencer/handlers.py
@@ -0,0 +1,89 @@
+#
+# Copyright (C) 2016-2019 by Nathan Lovato, Daniel Oakey, Razvan Radulescu, and contributors
+#
+# This file is part of Power Sequencer.
+#
+# Power Sequencer is free software: you can redistribute it and/or modify it under the terms of the
+# GNU General Public License as published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# Power Sequencer is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with Power Sequencer. If
+# not, see <https://www.gnu.org/licenses/>.
+#
+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)