power_sequencer/operators/grab.py

   1 # SPDX-FileCopyrightText: 2016-2020 by Nathan Lovato, Daniel Oakey, Razvan Radulescu, and contributors
   2 #
   3 # SPDX-License-Identifier: GPL-3.0-or-later
   4
   5 import bpy
   6
   7 from .utils.functions import get_mouse_frame_and_channel
   8 from .utils.global_settings import SequenceTypes
   9 from .utils.doc import doc_name, doc_idname, doc_brief, doc_description
  10
  11
  12 class POWER_SEQUENCER_OT_grab(bpy.types.Operator):
  13     """
  14     *brief* Grab and move sequences. Extends Blender's built-in grab tool
  15
  16
  17     Grab and move sequences. If you have no strips selected, it automatically
  18     finds the strip closest to the mouse and selects it. If you only select
  19     one or multiple crossfades, selects the handles on either side of the
  20     crossfades before moving sequences, using POWER_SEQUENCER_OT_crossfade_edit
  21     """
  22
  23     doc = {
  24         "name": doc_name(__qualname__),
  25         "demo": "",
  26         "description": doc_description(__doc__),
  27         "shortcuts": [({"type": "G", "value": "PRESS"}, {}, "")],
  28         "keymap": "Sequencer",
  29     }
  30     bl_idname = doc_idname(__qualname__)
  31     bl_label = doc["name"]
  32     bl_description = doc_brief(doc["description"])
  33     bl_options = {"REGISTER", "UNDO"}
  34
  35     @classmethod
  36     def poll(cls, context):
  37         return context.selected_sequences
  38
  39     def invoke(self, context, event):
  40         frame, channel = get_mouse_frame_and_channel(context, event)
  41         if not context.selected_sequences:
  42             bpy.ops.power_sequencer.select_closest_to_mouse(frame=frame, channel=channel)
  43         return self.execute(context)
  44
  45     def execute(self, context):
  46         if len(context.selected_sequences) == 0:
  47             return {"FINISHED"}
  48
  49         strip = context.selected_sequences[0]
  50         if len(context.selected_sequences) == 1 and strip.type in SequenceTypes.TRANSITION:
  51             context.scene.sequence_editor.active_strip = strip
  52             return bpy.ops.power_sequencer.crossfade_edit()
  53         else:
  54             return bpy.ops.transform.seq_slide("INVOKE_DEFAULT")