eco.py

#----------------------------------------------------------
# File sequencer_slide_strip.py
#----------------------------------------------------------

# ##### BEGIN GPL LICENSE BLOCK #####
#
#  This program 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 2
#  of the License, or (at your option) any later version.
#
#  This program 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 this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####



import bpy
from bpy.props import IntProperty, BoolProperty

from . import functions
    
 
class EcoPanel(bpy.types.Panel):
    bl_label = "Eco Tool"
    bl_idname = "OBJECT_PT_EcoTool"
    bl_space_type = "SEQUENCE_EDITOR"
    bl_region_type = "UI"

    @staticmethod
    def has_sequencer(context):
        return (context.space_data.view_type\
        in {'SEQUENCER', 'SEQUENCER_PREVIEW'})

    @classmethod
    def poll(self, context):
        if context.space_data.view_type in {'SEQUENCER', 'SEQUENCER_PREVIEW'}:
            strip = functions.act_strip(context)
            scn = context.scene
            preferences = context.user_preferences
            prefs = preferences.addons[__package__].preferences
            if scn and scn.sequence_editor and scn.sequence_editor.active_strip:
                if prefs.use_eco_tools:
                    return strip.type in ('META')
        else:
            return False
    
    def draw_header(self, context):
        layout = self.layout
        layout.label(text="", icon="FORCE_HARMONIC")
    
    def draw(self, context):
        scn = bpy.context.scene
        strip = functions.act_strip(context)
        seq_type = strip.type

        preferences = context.user_preferences
        prefs = preferences.addons[__package__].preferences
        
        if seq_type in ( 'MOVIE', 'IMAGE', 'META', 'MOVIECLIP', 'SCENE') :
            active_strip = functions.act_strip(context)
            layout = self.layout
            row=layout.row()
            row.prop(prefs, 'eco_value', text="Ecos")
            row=layout.row()
            row.prop(prefs, 'eco_offset', text="Offset")
            row=layout.row()
            row.prop(prefs, 'eco_use_add_blend_mode', text="use_add_blend_mode")
            row=layout.row()
            row.operator('sequencer.eco')
            
            
        
     
class OBJECT_OT_EcoOperator(bpy.types.Operator):
    
    bl_idname = "sequencer.eco"
    bl_label = "Eco operator"
    bl_description = 'generate an echo effect by duplicating the selected strip'
    bl_options = {'REGISTER', 'UNDO'}

    @staticmethod
    def has_sequencer(context):
        return (context.space_data.view_type\
        in {'SEQUENCER', 'SEQUENCER_PREVIEW'})

    @classmethod
    def poll(self, context):
        strip = functions.act_strip(context)
        scn = context.scene
        if scn and scn.sequence_editor and scn.sequence_editor.active_strip:
            return strip.type in ('META')
        else:
            return False
 
    def execute(self, context):
        
        active_strip=functions.act_strip(context)
        
        preferences = context.user_preferences
        prefs = preferences.addons[__package__].preferences
        
        scn = bpy.context.scene
        sel_strips = bpy.context.selected_sequences
        cur_camera = scn.camera
        eco = prefs.eco_value
        offset = prefs.eco_offset  
        
        active_strip.blend_type = 'REPLACE'
        active_strip.blend_alpha = 1
        for i in range(eco):
            bpy.ops.sequencer.duplicate(mode='TRANSLATION')
            bpy.ops.transform.seq_slide(value=(offset, 1), snap=False, snap_target='CLOSEST', snap_point=(0, 0, 0), snap_align=False, snap_normal=(0, 0, 0), release_confirm=False)
            
            active_strip = functions.act_strip(context)
            
            if prefs.eco_use_add_blend_mode:
                active_strip.blend_type = 'ADD'
                active_strip.blend_alpha = 1-1/eco
            else:
                active_strip.blend_type = 'ALPHA_OVER'
                active_strip.blend_alpha = 1/eco
            
        
        bpy.ops.sequencer.select_all(action='TOGGLE')
        bpy.ops.sequencer.select_all(action='TOGGLE')
        bpy.ops.sequencer.meta_make()

        
        return {'FINISHED'}