Example #1
0
def generate_netlist():
    netlist_path = os.path.join(path, netlist_name + '.net')
    netlist = Netlist(netlist_path, clear=True)
    
    netlist_line = {'dictionary': 'pwl',
                    'component': 'storage',
                    'label': 'stor',
                    'arguments': {'file': repr(data_path),
                                  'ctrl': 'e',
                                  'integ': True},
                    'nodes': ('N1', 'N2')}
    netlist.add_line(netlist_line)
    
    netlist_line = {'dictionary': 'pwl',
                    'component': 'dissipative',
                    'label': 'diss',
                    'arguments': {'file': repr(data_path),
                                  'ctrl': 'f'},
                    'nodes': (datum, 'N1')}
    netlist.add_line(netlist_line)

    netlist_line = {'dictionary': 'electronics',
                    'component': 'source',
                    'label': 'IN',
                    'arguments': {'type': 'voltage',
                                  'ctrl': 'f'},
                    'nodes': (datum, 'N2')}
    netlist.add_line(netlist_line)


    netlist.write()
Example #2
0
def test_faust_fx_generation():
    path = os.path.join(here, 'lowpass.net')     # Absolute path

    netlist = Netlist(path)              # Init Netlist with path to '.net' file
    #print(netlist.netlist())             # print netlist content

    graph = netlist.to_graph()           # Build Graph object from netlist

    core = graph.to_core()     # perform graph analysis and produce `Core`object
    #core.pprint()              # show structure

    core.M, core.J(), core.R()

    core.reduce_z()            # reduce linear dissipation functions in matrix R
    #core.pprint()              # show structure
    core.M, core.J(), core.R()

    pfc, C, R1 = core.symbols(['pfc', 'CCapa', 'R1'])  # define some symbols

    fref = 20
    cutoff = fref*10**(3*pfc)           # pfc in [0, 1] => cutoff in [2e1, 2e4]
    rc = 1/(2*3.14157*cutoff*C)         # resistance = 1/(2*pi*cutoff*C)

    # 1 remplacer
    core.subs[R1] = rc                  # substitute symbol R1 by expression rc

    # 2 appliquer
    core.substitute(selfexprs=True)     # substitute symbols by expressions
    core.R()

    # 3 déclarer
    core.add_parameters(pfc)            # add pfc to the list of control parameters

    # path to generated .dsp file
    label = 'lowpass'
    dsppath = os.path.join(here, label+'.dsp')

    # Select inputs: list of constant values and input labels
    # Here, we select input as 'uI' and set 'uO' to constant 0
    inputs = (0., 'uI')

    # Select outputs: list of outputs labels
    outputs = ('yO', )

    from pyphs import core2faustfx
    core2faustfx(core, path=dsppath, inputs=inputs, outputs=outputs)

    os.remove(dsppath)

    return True
Example #3
0
def test_faust_fx_generation():
    path = os.path.join(here, 'lowpass.net')  # Absolute path

    netlist = Netlist(path)  # Init Netlist with path to '.net' file
    #print(netlist.netlist())             # print netlist content

    graph = netlist.to_graph()  # Build Graph object from netlist

    core = graph.to_core()  # perform graph analysis and produce `Core`object
    #core.pprint()              # show structure

    core.M, core.J(), core.R()

    core.reduce_z()  # reduce linear dissipation functions in matrix R
    #core.pprint()              # show structure
    core.M, core.J(), core.R()

    pfc, C, R1 = core.symbols(['pfc', 'CCapa', 'R1'])  # define some symbols

    fref = 20
    cutoff = fref * 10**(3 * pfc)  # pfc in [0, 1] => cutoff in [2e1, 2e4]
    rc = 1 / (2 * 3.14157 * cutoff * C)  # resistance = 1/(2*pi*cutoff*C)

    # 1 remplacer
    core.subs[R1] = rc  # substitute symbol R1 by expression rc

    # 2 appliquer
    core.substitute(selfexprs=True)  # substitute symbols by expressions
    core.R()

    # 3 déclarer
    core.add_parameters(pfc)  # add pfc to the list of control parameters

    # path to generated .dsp file
    label = 'lowpass'
    dsppath = os.path.join(here, label + '.dsp')

    # Select inputs: list of constant values and input labels
    # Here, we select input as 'uI' and set 'uO' to constant 0
    inputs = (0., 'uI')

    # Select outputs: list of outputs labels
    outputs = ('yO', )

    from pyphs import core2faustfx
    core2faustfx(core, path=dsppath, inputs=inputs, outputs=outputs)

    os.remove(dsppath)

    return True
Example #4
0
    def _read(self):

        if not os.path.exists(self.path):
            self.netlist = Netlist(self.path)

        if not hasattr(self, 'Netlist'):
            self.netlist = Netlist(self.path)

        else:
            self.netlist.path = self.path
            for n in range(self.netlist.nlines()):
                self.netlist.delline(0)
            self.netlist.read()

        self.update()

        self._change_status(True)
        self.initSig.sig.emit()
Example #5
0
def generate_netlist():
    netlist_path = os.path.join(path, netlist_name + '.net')
    netlist = Netlist(netlist_path, clear=True)

    netlist_line = {
        'dictionary': 'pwl',
        'component': 'storage',
        'label': 'stor',
        'arguments': {
            'file': repr(data_path),
            'ctrl': 'e',
            'integ': True
        },
        'nodes': ('N1', 'N2')
    }
    netlist.add_line(netlist_line)

    netlist_line = {
        'dictionary': 'pwl',
        'component': 'dissipative',
        'label': 'diss',
        'arguments': {
            'file': repr(data_path),
            'ctrl': 'f'
        },
        'nodes': (datum, 'N1')
    }
    netlist.add_line(netlist_line)

    netlist_line = {
        'dictionary': 'electronics',
        'component': 'source',
        'label': 'IN',
        'arguments': {
            'type': 'voltage',
            'ctrl': 'f'
        },
        'nodes': (datum, 'N2')
    }
    netlist.add_line(netlist_line)

    netlist.write()
Example #6
0
# -----------------------------  CORES  ------------------------------------- #
this_script = os.path.realpath(__file__)
here = this_script[:this_script.rfind(os.sep)]


def netlist_path(label):
    return here + os.sep + label + '.net'


def sort_outputs(core):
    for i in range(core.dims.y()):
        if not str(core.y[i]).endswith(str(i+1)):
            core.move_port([str(y).endswith(str(i+1)) for y in core.y].index(True), i)

# build simple Cores
net1 = Netlist(netlist_path('phs1'))
c1 = net1.to_core()
sort_outputs(c1)
net2 = Netlist(netlist_path('phs2'))
c2 = net2.to_core()
sort_outputs(c2)

# concatenate c1 and c2 into a new Core
core = c1 + c2
# define the connection
core.add_connector((core.y.index(c1.y[1]), core.y.index(c2.y[1])),
                alpha=1)

# apply the connection
core.connect()
Example #7
0
@author: Falaize
"""

from __future__ import absolute_import, division, print_function

import os
from pyphs import Netlist, Graph

label = 'triodeamp'

path = os.path.realpath(__file__)[:os.path.realpath(__file__).rfind(os.sep)]

netlist_filename = path + os.sep + label + '.net'

netlist = Netlist(netlist_filename)

graph = Graph(netlist=netlist)

core = graph.to_core(verbose=False)
core.linear_nonlinear()
core.subsinverse()

#core.reduce_z()

#if __name__ == '__main__':
#
#    from pyphs import signalgenerator
#
#    config = {'fs': 96e3,
#              'split': True,
Example #8
0
Created on Sat May 13 17:00:14 2017

@author: Falaize
"""

from __future__ import absolute_import, division, print_function

import os
from pyphs import Netlist

label = 'fractional_integrator_fc'

path = os.path.realpath(__file__)[:os.path.realpath(__file__).rfind(os.sep)]

netlist_filename = path + os.sep + label + '.net'
netlist = Netlist(netlist_filename)
core = netlist.to_core()


# %% ------------------------------ SIMULATION ------------------------------ #

# UNCOMMENT BELOW FOR SIMULATION and PLOT OF TRANSFER FUNCTION
# !!! Very long simulation with numpy (use c++ if possible)

#if __name__ == '__main__':
#    from pyphs import Simulation, signalgenerator
#    from pyphs.misc.signals.analysis import transferFunction
#    import matplotlib.pyplot as plt
#    import numpy as np
#
#    config = {'fs': 48e3,
Example #9
0
def NetlistThieleSmallNL(clear=True, R=1e3, L=5e-2, Bl=50, M=0.1, K=5e3, A=1):
    """
    Write the netlist for a nonlinear version of the thieleSmall modeling of \
    loudspeakers.
    """

    netlist = Netlist(path, clear=clear)

    datum = netlist.datum

    # input voltage
    source = {
        'dictionary': 'electronics',
        'component': 'source',
        'label': 'IN',
        'nodes': ('A', datum),
        'arguments': {
            'type': "voltage"
        }
    }
    netlist.add_line(source)

    # resistor 1
    resistance = {
        'dictionary': 'electronics',
        'component': 'resistor',
        'label': 'R',
        'nodes': ('A', 'B'),
        'arguments': {
            'R': ('R', R)
        }
    }
    netlist.add_line(resistance)

    # inductor
    inductor = {
        'dictionary': 'electronics',
        'component': 'inductor',
        'label': 'L',
        'nodes': ('B', 'C'),
        'arguments': {
            'L': ('L', L)
        }
    }
    netlist.add_line(inductor)

    # gyrator
    gyrator = {
        'dictionary': 'connectors',
        'component': 'gyrator',
        'label': 'G',
        'nodes': ('C', datum, 'D', datum),
        'arguments': {
            'alpha': ('Bl', Bl)
        }
    }
    netlist.add_line(gyrator)

    # masse
    mass = {
        'dictionary': 'mechanics_dual',
        'component': 'mass',
        'label': 'M',
        'nodes': ('D', 'E'),
        'arguments': {
            'M': ('M', M)
        }
    }
    netlist.add_line(mass)

    # ressort cubic
    stifness = {
        'dictionary': 'mechanics_dual',
        'component': 'springcubic',
        'label': 'K',
        'nodes': ('E', 'F'),
        'arguments': {
            'K0': ('K0', K),
            'K2': ('K2', 1e20)
        }
    }
    netlist.add_line(stifness)

    # amortissement
    damper = {
        'dictionary': 'mechanics_dual',
        'component': 'damper',
        'label': 'A',
        'nodes': ('F', datum),
        'arguments': {
            'A': ('A', A)
        }
    }
    netlist.add_line(damper)

    netlist.write()

    return netlist
Example #10
0
# electronics.resistor R1 ('A', 'B'): R=('R1', 1000.0);
# electronics.inductor L1 ('B', 'C'): L=('L1', 0.05);
# electronics.capacitor C1 ('C', 'ref'): C=('C1', 2e-06);
# ```

# # Automated netlist generation
# There is two reasons you want to automatize the generation of the netlist:
# 1. It allows for easy management of sequential experiments (*e.g.* for which a single parameter take several values).
# 2. It is more robust with respect to possible changes of the netlist formating in the future of `pyphs`.
#
# This is done by defining each component as a line of the netlist in the `pyphs.Netlist`. This structure is defined by the `pyphs.graphs.Netlist` class, and is accessible with

# In[2]:

from pyphs import Netlist
net = Netlist('rlc.net', clear = True)


# Each line is defined with the `phs.graph.netlist.add_line` command, which takes python dicitonary with the following structure as arguments:
# ```python
# netlist_line = {'dictionary': 'dico',
#                 'component': 'comp',
#                 'label': 'label',
#                 'nodes': ('node1', ..., 'nodeN'),
#                 'arguments': {'par1': "('lab1', val1)",
#                               'par2': "'lab2'",
#                               'par3': "val3"
#                               }
#                 }
# ```
# As an example, the declaration of the RLC components to the above `phs` object is as follows.
Created on Sat May 13 17:00:14 2017

@author: Falaize
"""

from __future__ import absolute_import, division, print_function

import os
from pyphs import Netlist

label = 'fractional_intergrator_ec'

path = os.path.realpath(__file__)[:os.path.realpath(__file__).rfind(os.sep)]

netlist_filename = path + os.sep + label + '.net'
netlist = Netlist(netlist_filename)
core = netlist.to_core()
# UNCOMMENT BELOW FOR SIMULATION and PLOT OF TRANSFER FUNCTION
# !!! Very long simulation with numpy
#
#if __name__ == '__main__':
#
#    from pyphs import  Simulation, signalgenerator
#    from pyphs.misc.signals.analysis import transferFunction
#    import matplotlib.pyplot as plt
#    import numpy as np
#
#    config = {'fs': 48e3,
#              'split': True,
#              'pbar': True,
#              'timer': True,
Example #12
0
    """
    return here + os.sep + label + '.net'


def sort_outputs(core):
    """
    Build netlist file name from label.
    """
    for i in range(core.dims.y()):
        if not str(core.y[i]).endswith(str(i + 1)):
            core.move_port([str(y).endswith(str(i + 1))
                            for y in core.y].index(True), i)


# build simple Cores
net1 = Netlist(netlist_path('phs1'))
c1 = net1.to_core()
sort_outputs(c1)

net2 = Netlist(netlist_path('phs2'))
c2 = net2.to_core()
sort_outputs(c2)

# -----------------------------  CONNECT  ----------------------------------- #

# concatenate c1 and c2 into a new Core
core = c1 + c2

# define the connection
core.add_connector((core.y.index(c1.y[1]), core.y.index(c2.y[1])), alpha=1)
Example #13
0
@author: afalaize
"""

from __future__ import absolute_import, division, print_function

import os
from pyphs import Netlist
import matplotlib.pyplot as plt
plt.close('all')

# netlist is "{label}.net"
label = 'sp_circuit'

# get folder path
path = os.path.realpath(__file__)[:os.path.realpath(__file__).rfind(os.sep)]

# def filename
netlist_filename = os.path.join(path, '{0}.net'.format(label))

# read in Netlist object
netlist = Netlist(netlist_filename)

# Build Graph object
graph = netlist.to_graph()

graph.sp_split()

# Build Core object
core = graph.to_core(merge_all=True)
Example #14
0
# electronics.resistor R1 ('A', 'B'): R=('R1', 1000.0);
# electronics.inductor L1 ('B', 'C'): L=('L1', 0.05);
# electronics.capacitor C1 ('C', 'ref'): C=('C1', 2e-06);
# ```

# # Automated netlist generation
# There is two reasons you want to automatize the generation of the netlist:
# 1. It allows for easy management of sequential experiments (*e.g.* for which a single parameter take several values).
# 2. It is more robust with respect to possible changes of the netlist formating in the future of `pyphs`.
#
# This is done by defining each component as a line of the netlist in the `pyphs.Netlist`. This structure is defined by the `pyphs.graphs.Netlist` class, and is accessible with

# In[2]:

from pyphs import Netlist
net = Netlist('rlc.net', clear = True)


# Each line is defined with the `phs.graph.netlist.add_line` command, which takes python dicitonary with the following structure as arguments:
# ```python
# netlist_line = {'dictionary': 'dico',
#                 'component': 'comp',
#                 'label': 'label',
#                 'nodes': ('node1', ..., 'nodeN'),
#                 'arguments': {'par1': "('lab1', val1)",
#                               'par2': "'lab2'",
#                               'par3': "val3"
#                               }
#                 }
# ```
# As an example, the declaration of the RLC components to the above `phs` object is as follows.
Example #15
0
def NetlistThieleSmallNL(clear=True,
                         R=1e3, L=5e-2, Bl=50, M=0.1, K=5e3, A=1):
    """
    Write the netlist for a nonlinear version of the thieleSmall modeling of \
    loudspeakers.
    """

    netlist = Netlist(path, clear=clear)

    datum = netlist.datum

    # input voltage
    source = {'dictionary': 'electronics',
              'component': 'source',
              'label': 'IN',
              'nodes': ('A', datum),
              'arguments': {'type': "voltage"}}
    netlist.add_line(source)

    # resistor 1
    resistance = {'dictionary': 'electronics',
                  'component': 'resistor',
                  'label': 'R',
                  'nodes': ('A', 'B'),
                  'arguments': {'R': ('R', R)}}
    netlist.add_line(resistance)

    # inductor
    inductor = {'dictionary': 'electronics',
                'component': 'inductor',
                'label': 'L',
                'nodes': ('B', 'C'),
                'arguments': {'L': ('L', L)}}
    netlist.add_line(inductor)

    # gyrator
    gyrator = {'dictionary': 'connectors',
               'component': 'gyrator',
               'label': 'G',
               'nodes': ('C', datum, 'D', datum),
               'arguments': {'alpha': ('Bl', Bl)}}
    netlist.add_line(gyrator)

    # masse
    mass = {'dictionary': 'mechanics_dual',
            'component': 'mass',
            'label': 'M',
            'nodes': ('D', 'E'),
            'arguments': {'M': ('M', M)}}
    netlist.add_line(mass)

    # ressort cubic
    stifness = {'dictionary': 'mechanics_dual',
                'component': 'springcubic',
                'label': 'K',
                'nodes': ('E', 'F'),
                'arguments': {'K0': ('K0', K),
                              'K2': ('K2', 1e20)}
                }
    netlist.add_line(stifness)

    # amortissement
    damper = {'dictionary': 'mechanics_dual',
              'component': 'damper',
              'label': 'A',
              'nodes': ('F', datum),
              'arguments': {'A': ('A', A)}}
    netlist.add_line(damper)

    netlist.write()

    return netlist
Example #16
0
class NetlistWidget(QWidget):
    def get_status(self):
        return self.titleWidget.status

    status = property(get_status)

    def get_label(self):
        fn = self.netlist.filename
        label = fn[:fn.rfind('.')]
        return label

    label = property(get_label)

    def __init__(self, filepath=None, parent=None):

        super(NetlistWidget, self).__init__(parent)

        self.initSig = NoneSig()
        self.statusSig = BoolSig()

        self.initUI()

        if filepath is None:
            self.initMessage()
        else:
            self.path = filepath
            self._read()

    def initUI(self):

        # ---------------------------------------------------------------------
        # Create Empty (nlines)x5 Table
        self.tableWidget = QTableWidget()
        self.tableWidget.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.tableWidget.setColumnCount(5)
        self.tableWidget.setEditTriggers(QAbstractItemView.NoEditTriggers)

        self.tableLabels = ('Dictionary', 'Component', 'Label', 'Nodes',
                            'Arguments')

        # Add Header
        horHeaders = []
        for n, key in enumerate(self.tableLabels):
            horHeaders.append(key)
        self.tableWidget.setHorizontalHeaderLabels(horHeaders)

        self.tableWidget.setFixedWidth(520)
        self.tableWidget.setFixedHeight(200)

        # ---------------------------------------------------------------------
        # Define Netlist File Actions

        self.buttonsLayout = QHBoxLayout()

        # New Action
        new_icon = QIcon(os.path.join(iconspath, 'new.png'))
        self.newAction = QAction(new_icon, '&New Netlist', self)
        self.newAction.setShortcut('Ctrl+N')
        self.newAction.setStatusTip('Create a new netlist')
        self.newAction.triggered.connect(self._new)
        self.newButton = QPushButton(new_icon, '')
        self.newButton.setToolTip('Create a new netlist')
        self.newButton.clicked.connect(self._new)
        self.buttonsLayout.addWidget(self.newButton)

        # Open Action
        open_icon = QIcon(os.path.join(iconspath, 'open.png'))
        self.openAction = QAction(open_icon, '&Open Netlist', self)
        self.openAction.setShortcut('Ctrl+O')
        self.openAction.setStatusTip('Open an existing netlist')
        self.openAction.triggered.connect(self._open)
        self.openButton = QPushButton(open_icon, '')
        self.openButton.setToolTip('Open an existing netlist')
        self.openButton.clicked.connect(self._open)
        self.buttonsLayout.addWidget(self.openButton)

        # Save Action
        save_icon = QIcon(os.path.join(iconspath, 'save.png'))
        self.saveAction = QAction(save_icon, '&Save Netlist', self)
        self.saveAction.setShortcut('Ctrl+S')
        self.saveAction.setStatusTip('Save the netlist')
        self.saveAction.triggered.connect(self._save)
        self.saveButton = QPushButton(save_icon, '')
        self.saveButton.setToolTip('Save the netlist')
        self.saveButton.clicked.connect(self._save)
        self.buttonsLayout.addWidget(self.saveButton)

        # Saveas Action
        saveas_icon = QIcon(os.path.join(iconspath, 'saveas.png'))
        self.saveasAction = QAction(saveas_icon, '&Save Netlist as', self)
        self.saveasAction.setShortcut('Ctrl+Shift+S')
        self.saveasAction.setStatusTip('Save as a new netlist')
        self.saveasAction.triggered.connect(self._saveas)
        self.saveasButton = QPushButton(saveas_icon, '')
        self.saveasButton.setToolTip('Save the netlist as a new netlist')
        self.saveasButton.clicked.connect(self._saveas)
        self.buttonsLayout.addWidget(self.saveasButton)

        # ---------------------------------------------------------------------
        # Define Netlist Line Actions

        self.actionsLayout = QHBoxLayout()

        # Editline Action
        edit_icon = QIcon(os.path.join(iconspath, 'edit.png'))
        self.editAction = QAction(edit_icon, '&Edit line', self)
        self.editAction.setShortcut('Ctrl+E')
        self.editAction.setStatusTip('Edit an existing line of the netlist')
        self.editAction.triggered.connect(self._edit_line)
        self.editButton = QPushButton(edit_icon, '')
        self.editButton.setToolTip('Edit an existing line of the netlist')
        self.editButton.clicked.connect(self._edit_line)
        self.actionsLayout.addWidget(self.editButton)

        # addline Action
        add_icon = QIcon(os.path.join(iconspath, 'add.png'))
        self.addlineAction = QAction(add_icon, '&New line', self)
        self.addlineAction.setShortcut('Ctrl+L')
        self.addlineAction.setStatusTip('Add a new line to the netlist')
        self.addlineAction.triggered.connect(self._new_line)
        self.addlineButton = QPushButton(add_icon, '')
        self.addlineButton.setToolTip('Add a new line to the netlist')
        self.addlineButton.clicked.connect(self._new_line)
        self.actionsLayout.addWidget(self.addlineButton)

        # delline Action
        del_icon = QIcon(os.path.join(iconspath, 'del.png'))
        self.dellineAction = QAction(del_icon, '&Delete line', self)
        self.dellineAction.setShortcut('Ctrl+L')
        self.dellineAction.setStatusTip('Delete a line from the netlist')
        self.dellineAction.triggered.connect(self._del_line)
        self.dellineButton = QPushButton(del_icon, '')
        self.dellineButton.setToolTip('Delete a line from the netlist')
        self.dellineButton.clicked.connect(self._del_line)
        self.actionsLayout.addWidget(self.dellineButton)

        self.actionsLayout.addStretch()

        # ---------------------------------------------------------------------
        # Datum widget
        desc = 'Key for reference node (e.g. electrical grounds and mechanical reference points).'
        self.datumWidget = DescriptionWidget('datum', datum, desc)

        #        self.actionsLayout.addWidget(datumWidget)
        #
        #        self.actionsWidget = QWidget(self)
        #        self.actionsWidget.setLayout(self.actionsLayout)

        # ---------------------------------------------------------------------
        # title widget

        title = 'NETLIST'
        self.labelWidget = QLabel(self)
        status_labels = {True: 'Saved', False: 'Not Saved'}
        self.titleWidget = TitleWidget(title=title,
                                       labelWidget=self.labelWidget,
                                       status_labels=status_labels,
                                       buttonsLayout=self.buttonsLayout)

        self.tableWidget.setMaximumWidth(self.titleWidget.width())

    def initMessage(self):
        msgBox = QMessageBox(self)
        msgBox.setText('Netlist file selection')
        msgBox.addButton(QPushButton('New'), QMessageBox.YesRole)
        msgBox.addButton(QPushButton('Open'), QMessageBox.NoRole)
        init = msgBox.exec_()
        if init == 0:
            self._new()
        else:
            assert init == 1
            self._open()

    def update(self):

        # read data
        data = dict()

        for label in self.tableLabels:
            data.update({label: list()})

        for netline in self.netlist:
            for label in self.tableLabels:
                el = netline[label.lower()]
                if isinstance(el, dict):
                    string = ''
                    for k in el.keys():
                        string += "{0!s}: {1!s}; ".format(k, el[k])
                    string = string[:-1]
                elif isinstance(el, tuple):
                    string = ''
                    for obj in el:
                        string += "{0!s}, ".format(obj)
                    string = string[:-1]
                else:
                    string = str(el)

                data[label].append(string)

        # Enter data onto Table
        self.tableWidget.setRowCount(self.netlist.nlines())
        for n, key in enumerate(self.tableLabels):
            for m, item in enumerate(data[key]):
                newitem = QTableWidgetItem(item)
                self.tableWidget.setItem(m, n, newitem)

        self._update_path()
        self._change_status(False)

    def _change_status(self, s=False):
        if not self.status == s:
            self.titleWidget._change_status(s)
            self.statusSig.sig.emit(s)

    def _update_path(self):
        label = self.netlist.filename
        self.titleWidget.labelWidget.setToolTip(self.netlist.path)
        self.titleWidget._change_label(label)

    def _read(self):

        if not os.path.exists(self.path):
            self.netlist = Netlist(self.path)

        if not hasattr(self, 'Netlist'):
            self.netlist = Netlist(self.path)

        else:
            self.netlist.path = self.path
            for n in range(self.netlist.nlines()):
                self.netlist.delline(0)
            self.netlist.read()

        self.update()

        self._change_status(True)
        self.initSig.sig.emit()

    def _new(self):
        options = QFileDialog.Options()
        options |= QFileDialog.DontUseNativeDialog
        dialog = QFileDialog()
        try:
            filename = os.path.join(self.netlist.path)
        except AttributeError:
            filename = os.path.join(os.getcwd(), 'netlist.net')
        dialog.selectFile(filename)
        fname, _ = dialog.getSaveFileName(
            self,
            "Save new netlist file as...",
            filename,
            "All Files (*);;PyPHS netlist files (*.net)",
            "PyPHS netlist files (*.net)",
            options=options)
        if not fname == '':
            if not fname[-4:] == '.net':
                fname += '.net'
            self.path = fname
            self._read()

    def _open(self):
        options = QFileDialog.Options()
        options |= QFileDialog.DontUseNativeDialog
        dialog = QFileDialog()
        try:
            filename = os.path.join(self.netlist.path)
        except AttributeError:
            filename = os.path.join(os.getcwd(), 'netlist.net')
        dialog.selectFile(filename)
        fname, _ = dialog.getOpenFileName(
            self,
            'Open netlist file',
            filename,
            "All Files (*);;PyPHS netlist files (*.net)",
            "PyPHS netlist files (*.net)",
            options=options)
        if not fname == '':
            self.path = fname
            self._read()

    def _saveas(self):
        options = QFileDialog.Options()
        options |= QFileDialog.DontUseNativeDialog
        dialog = QFileDialog()
        try:
            filename = os.path.join(self.netlist.path)
        except AttributeError:
            filename = os.path.join(os.getcwd(), 'netlist.net')
        dialog.selectFile(filename)
        fname, _ = dialog.getSaveFileName(
            self,
            "Save netlist file as...",
            filename,
            "All Files (*);;PyPHS netlist files (*.net)",
            "PyPHS netlist files (*.net)",
            options=options)
        if not fname == '':
            if not fname[-4:] == '.net':
                fname += '.net'
            self.netlist.write(fname)
            self.path = fname
            self._read()

    def _save(self):
        self.netlist.write()
        self._change_status(True)

    def _new_line(self):
        netline, res = EditDialog.getNetline(self)
        if res:
            self.netlist.add_line(netline)
            self.update()

    def _del_line(self):
        for i in range(self.tableWidget.rowCount()):
            r = range(self.tableWidget.columnCount())
            if any([self.tableWidget.item(i, j).isSelected() for j in r]):
                break
        self.netlist.delline(i)
        self.update()

    def _edit_line(self):

        for i in range(self.tableWidget.rowCount()):
            r = range(self.tableWidget.columnCount())
            if any([self.tableWidget.item(i, j).isSelected() for j in r]):
                break
        line = self.netlist[i]
        netline, res = EditDialog.getNetline(self, line)
        if res:
            self.netlist.setline(i, netline)
            self.update()