file_save_loader.py

from xml.dom import minidom
import xml.etree.ElementTree as ET

from aengine_thread import AudioItem
from kivy.graphics import Color, Line, Rectangle
import math
import time

from kivy.app import App
class FileSystem(object):
    def read_project_file(self, ai, filename, can):
        tree = ET.parse(filename)  
        root = tree.getroot()
            # filename, volume, pan, effects, velocity, posX, posY, sizeW, sizeH
        # all item attributes
        # can.clear()
        # App.get_running_app().root.sgr.draw_grid(100,3,1000,1000,10)
        for elem in root:  
            for subelem in elem:
                # basic attributes to an audio item
                filename = subelem.attrib['filename']
                volume = subelem.attrib['volume']
                pan = subelem.attrib['pan']
                # effects = subelem.attrib['effects']
                velocity = subelem.attrib['velocity']
                posX = subelem.attrib['posX']
                posY = subelem.attrib['posY']
                sizeW = subelem.attrib['sizeW']
                sizeH = subelem.attrib['sizeH']

                # print("filename", "[{}]".format(filename))
                print("posX", posX)
                print("posY", posY)

                with can:
                    audioitem = AudioItem(filename, volume, pan, velocity, [posX, posY], [sizeW, sizeH])
                    ai.append(audioitem)

                print("posX type is",type(posX))
                x = int(float(posX))
                y = int(float(posY))
                w = int(float(sizeW))
                h = int(float(sizeH))
                
                # r = Rectangle(pos=[x, y], size=[w, h])
                # can.add(r)


                # check if we have a sub element aka a list of effects
                if len(subelem) > 1:
                    for item in subelem:
                        if item.tag == 'effect':
                            for k,v in item.attrib.items():
                                print("  {} {}".format(k,v))
                            print("  ----------")
                print("-"*20)


    # read_project_file("demo_project.xml")

    def write_project_file(self, audioitems, filename):

        # create the file structure
        data = ET.Element('data')  
        items = ET.SubElement(data, 'items')  

        for item in audioitems:
            #filename
            #volume
            #pan
            #effects
            #velocity
            #posX
            #posY
            #sizeW
            #sizeH
            item1 = ET.SubElement(items, 'audioitem')
            item1.set('filename', str(item.filename))
            item1.set('volume', str(item.volume))
            item1.set('pan', str(item.pan))
            item1.set('effects', str(item.effects))
            # for item in effects
                # effect = ET.SubElement(item1, 'effect')
                # effect.set('type', 'reverb')  
                # effect.set('size', '0.3')  
                # effect.set('damp', '1.0')  
                # effect.set('bal', '0.4')  
            item1.set('velocity', str(item.velocity))
            item1.set('posX', str(item.pos[0]))
            item1.set('posY', str(item.pos[1]))

            item1.set('sizeW', str(item.size[0]))
            item1.set('sizeH', str(item.size[1]))

        # create a new XML file with the results
        xmlstr = minidom.parseString(ET.tostring(data)).toprettyxml(indent="   ", encoding='UTF-8')
        mydata = str(xmlstr.decode('UTF-8'))
        myfile = open(filename, "w")  
        myfile.write(mydata)  


# write_project_file(sample_audio_items, "test2.xml")