reflow/reflowctl/reflowctl_gui.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys, os, random, copy, struct

from collections import deque
from operator import attrgetter

import xml.etree.ElementTree as etree

import pylab
import numpy
from PyQt4 import QtGui, QtCore

from numpy import arange, sin, pi, array, linspace, arange
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
from matplotlib.lines import Line2D
from matplotlib.path import Path
import matplotlib.patches as patches

from mpltools import annotation

progname = os.path.basename(sys.argv[0])
progversion = "0.1"

def calc_colors(count):
    if count == 1:
        return [QtGui.QColor(0, 255, 0),]
    r = 0
    g = 255
    step = int(512. / (count-1))
    colors = list()
    for i in range(count):
        colors.append(QtGui.QColor(r, g, 0))
        if r < 255:
            r += step
            if r > 255:
                g -= (r - 256)
                r = 255
                g = max(0, g)
        else:
            g -= step
            g = max(0, g)
    return colors

def set_colors(temp_levels):
    colors = calc_colors(len(temp_levels) - 1)
    ix = 0
    for temp_level in temp_levels:
        if not temp_level.is_env:
            temp_level.color = colors[ix]
            ix += 1
        else:
            temp_level.color = QtGui.QColor("black")



def create_profile_header(x_list, y_list):
    tpl = "#ifndef _H_SOLDER_PROFILE\n" \
    "#define _H_SOLDER_PROFILE\n" \
    "\n" \
    "%s\n" \
    "\n" \
    "};\n" \
    "\n" \
    "#endif\n"

    data_tpl = "unsigned int profile_%d[%d][2] = \n%s\n" \

    s = list()

    ix = 0
    for x, y in zip(x_list, y_list):
        tmp = list()
        for a, b in zip(x, y):
            tmp.append("{%d, %d}" % (a, b))
        s.append(data_tpl % (ix, len(x), "\n".join(tmp)))
        ix += 1

    open("test.h", "w").write(tpl % ("\n".join(s)))

def create_profile_packet(x, y):
    # msg = [length, x_0, y_0,x_1, y_1, ..., x_length-1, y_length-1]

    tmp = [len(x) * 2 * 2,]

    for a, b in zip(x, y):
        tmp.append(a)
        tmp.append(b)

    tpl = "H" + (len(x) * 2) * "H"
    res = struct.pack(tpl, *tmp)
    return  res

def getTemperature():
    return 20.


class TempLevel(QtCore.QObject):
    def __init__(self, name, temp, is_env=False):
        self.name = name
        self.temp = temp
        self.is_env = is_env
        self.color = None


class Solder(QtCore.QObject):

    log_message = QtCore.pyqtSignal(str)

    def __init__(self, name=str(), description=str(), parent=None):
        super(Solder, self).__init__(parent)
        self.name = name
        self.description = description
        self.temp_levels = list()
        self.durations = list()
        self.rates = list()
        self.changed = False

    def __unicode__(self):
        return unicode(self.name)

    def __str__(self):
        return self.name

    def add_temp_level(self, name, temp, is_env):
        s = TempLevel(name, temp, is_env)
        self.temp_levels.append(s)
        return s

    def add_rate(self, states, rate):
        self.rates.append([states, rate])

    def add_duration(self, states, duration):
        self.durations.append([states, duration])

    def get_temp_level_by_name(self, name):
        assert isinstance(name, basestring)
        for i in self.temp_levels:
            if i.name == name:
                return i
        return None

    def get_temp_level(self, ix):
        assert isinstance(ix, int)
        return self.temp_levels[ix]

    def calc_rate(self, x1, y1, x2, y2):
        return (y2 - y1) / (x2 - x1)

    def check_duration_constraints(self, temp_level, used):

        x = list()
        y = list()
        temp_levels = None
        value = None
        for temp_levels, value in self.durations:
            tl_len = len(temp_levels)
            if temp_levels and temp_levels[0] == temp_level and tl_len > 1:
                if temp_level not in used:
                    used.add(temp_level)
                    x.append(self.time)
                    y.append(temp_level.temp)

                if tl_len == 2:
                    y.append(temp_levels[1].temp)
                    used.add(temp_levels[1])
                    self.time += value
                    x.append(self.time)
                elif tl_len >= 3:
                    part = value / (tl_len - 1)
                    for tl in temp_levels[1:]:
                        used.add(tl)

                        self.time += part
                        x.append(self.time)
                        y.append(tl.temp)

                self.log.append("* Duration connection: TempLevel %r connected to TempLevels %r" % (temp_level.name, [tl.name for tl in temp_levels[1:]]))

        return x, y

    def check_rate_constraints(self, temp_level, used):
        x = list()
        y = list()
        for temp_levels, value in self.rates:
            tl_len = len(temp_levels)
            if temp_levels and temp_levels[0] == temp_level and tl_len > 1:
                if temp_level not in used:
                    used.add(temp_level)
                    x.append(self.time)
                    y.append(temp_level.temp)

                self.time += (temp_levels[1].temp - temp_level.temp) / value
                used.add(temp_levels[1])
                x.append(self.time)
                y.append(temp_levels[1].temp)

                self.log.append("* Rate connection: TempLevel %r connected to TempLevels %r" % (temp_level.name, [tl.name for tl in temp_levels[1:]]))

        return x, y

    def calc_profile(self):

        self.log = list()
        x = list()
        y = list()
        duration_points = dict()
        rate_points = dict()
        self.time = 0
        used = set()
        unused = list()
        for temp_level in self.temp_levels:
            dur_x, dur_y = self.check_duration_constraints(temp_level, used)
            rate_x, rate_y = self.check_rate_constraints(temp_level, used)

            if len(dur_x) > 0:
                x.extend(dur_x)
                y.extend(dur_y)
            elif len(rate_x) > 0:
                x.extend(rate_x)
                y.extend(rate_y)
            else:
                if temp_level not in used:
                    unused.append(temp_level)

        self.log.append("")
        map(self.log.append, ["* Missing Connection: %r" % tl.name for tl in unused])
        self.log_message.emit("\n".join(self.log))
        del self.log
        return array(map(float, x)), array(map(float, y)), max(x), max(y), used, unused

    def calc_profile_old(self):

        x = list()
        y = list()
        duration_points = dict()
        rate_points = dict()
        self.time = 0
        used_temp_levels = set()
        for ix, temp_level in enumerate(self.temp_levels):
            if temp_level != self.temp_levels[0] and temp_level not in used_temp_levels:
                ix = self.temp_levels.index(temp_level)
                raise ValueError("TempLevel %r not connected to %r" % (self.temp_levels[ix-1].name, self.temp_levels[ix].name))

            temp_levels = None
            duration = None
            for sts, dur in self.durations:
                if sts and sts[0] == temp_level:
                  duration = dur
                  temp_levels = sts
                  break

            if temp_level not in used_temp_levels:
                used_temp_levels.add(temp_level)
                x.append(self.time)
                y.append(temp_level.temp)

            if duration is not None:
                if len(temp_levels) == 3:
                    used_temp_levels.add(temp_levels[1])
                    used_temp_levels.add(temp_levels[2])

                    self.time += duration / 2
                    x.append(self.time)
                    y.append(temp_levels[1].temp)

                    self.time += duration / 2
                    x.append(self.time)
                    y.append(temp_levels[2].temp)

                    duration_points[ix] = (x[-3:], y[-3:])
                else:
                    y.append(temp_levels[1].temp)
                    used_temp_levels.add(temp_levels[1])
                    self.time += duration
                    x.append(self.time)
                    duration_points[ix] = (x[-2:], y[-2:])
            else:
                for ex, (sts, rate) in enumerate(self.rates):
                    if sts and sts[0] == temp_level:
                        used_temp_levels.add(sts[1])
                        duration = (sts[1].temp - temp_level.temp) / rate
                        self.time += duration
                        x.append(self.time)
                        y.append(sts[1].temp)
                        rate_points[ex] = (x[-2:], y[-2:])

        return array(map(float, x)), array(map(float, y)), max(x), max(y), duration_points, rate_points


    @staticmethod
    def unpack(filename, parent):
        xmltree = etree.parse(filename)
        root = xmltree.getroot()
        solder_node = root[0]
        s = Solder(solder_node.attrib["name"], solder_node.attrib["description"], parent)
        env_count = 0
        for temp_level in solder_node.findall("state"):
            tstr = temp_level.attrib["temperature"]
            is_env = False
            try:
                temp = int(tstr)
            except ValueError:
                if tstr == "$ENV":
                    temp = getTemperature()
                    is_env = True
                    env_count += 1
            s.add_temp_level(temp_level.attrib["name"], temp, is_env)

        set_colors(s.temp_levels)

        for duration in solder_node.findall("duration"):
            temp_levels = list()
            for temp_level in duration:
                temp_levels.append(s.get_temp_level_by_name(temp_level.attrib["name"]))
            s.add_duration(temp_levels, int(duration.attrib["value"]))
        for rate in solder_node.findall("rate"):
            temp_levels = list()
            for temp_level in rate:
                temp_levels.append(s.get_temp_level_by_name(temp_level.attrib["name"]))
            s.add_rate(temp_levels, int(rate.attrib["value"]))

        return s

    def save(self, filename):
        if self.changed:
            solder_node = etree.Element("solder_type", {"name" : self.name, "description" : self.description})
            for temp_level in self.temp_levels:
                temp = temp_level.is_env and "$ENV" or str(temp_level.temp)
                solder_node.append(etree.Element("state", {"name" : temp_level.name, "temperature" : temp}))
            for temp_levels, value in self.durations:
                duration = etree.Element("duration", {"value" : str(value)})
                for temp_level in temp_levels:
                    duration.append(etree.Element("state", {"name" : temp_level.name}))
                solder_node.append(duration)
            for temp_levels, value in self.rates:
                rate = etree.Element("rate", {"value" : str(value)})
                for temp_level in temp_levels:
                    rate.append(etree.Element("state", {"name" : temp_level.name}))
                solder_node.append(rate)

            dirname = os.path.join(os.path.dirname(__file__), "solder_types")
            root = etree.Element("xml")
            root.append(solder_node)
            etree.ElementTree(root).write(os.path.join(dirname, self.name + ".xml"), "UTF-8", True)
            self.changed = False



class SolderListModel(QtCore.QAbstractListModel):
    def __init__(self, parent=None, *args):
        """ datain: a list where each item is a row
        """
        super(SolderListModel, self).__init__(parent, *args)

        self.reload()

    def rowCount(self, parent=QtCore.QModelIndex()):
        return len(self.listdata)

    def reload(self):
        dirname = os.path.join(os.path.dirname(__file__), "solder_types")
        dirlisting = filter(lambda x: os.path.splitext(x)[1] == ".xml", os.listdir(dirname))
        self.listdata = []
        for p in dirlisting:
            self.listdata.append(Solder.unpack(os.path.join(dirname, p), self))
        self.listdata.sort(key=lambda x: x.name)
        self.reset()

    def headerData(self, col, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            return QtCore.QVariant("Solder Paste")
        return QtCore.QVariant()

    def data(self, index, role):
        if index.isValid() and role == QtCore.Qt.DisplayRole:
            solder = self.listdata[index.row()]
            if solder.changed:
                return QtCore.QVariant(solder.name + " *")
            else:
                return QtCore.QVariant(solder.name)
        else:
            return QtCore.QVariant()

    def setData(self, index, variant, role):
        if index.isValid() and role == QtCore.Qt.EditRole:
            new_name = str(variant.toString())
            if new_name and new_name != "":
                self.listdata[index.row()].name = new_name
                self.listdata[index.row()].changed = True
                return True
        return False

    def flags(self, index):
        if not index.isValid():
            return 0
        return QtCore.Qt.ItemFlags(QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEditable)

    def create_solder(self):
        solder = Solder("new", "")

        tl = solder.add_temp_level("environment temp", getTemperature(), True)
        tl.color = QtGui.QColor(0, 0, 0)
        self.listdata.append(solder)
        self.reset()


class TempLevelModel(QtCore.QAbstractTableModel):
    solder_changed = QtCore.pyqtSignal()

    def __init__(self, parent):
        super(TempLevelModel, self).__init__(parent)
        self._changed = False
        self.temp_levels = list()
        self.headerdata = [u"Name", u"Temperature (°C)"]

    def headerData(self, col, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            return QtCore.QVariant(self.headerdata[col])
        return QtCore.QVariant()

    def rowCount(self, parent):
        return len(self.temp_levels)

    def columnCount(self, parent):
        return 2

    def data(self, index, role):
        if not index.isValid():
            return QtCore.QVariant()

        if role == QtCore.Qt.DisplayRole:
          col = index.column()
          if col == 0:
              return QtCore.QVariant(self.temp_levels[index.row()].name)
          else:
              return QtCore.QVariant(self.temp_levels[index.row()].temp)

        if index.column() == 0 and role == QtCore.Qt.DecorationRole:
            p = QtGui.QPixmap(10,10)
            color = self.temp_levels[index.row()].color
            p.fill(color)
            return p

        return QtCore.QVariant()

    def flags(self, index):
        if not index.isValid():
            return 0
        return QtCore.Qt.ItemFlags(QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEditable)

    def setData(self, index, variant, role):
        if index.isValid() and role == QtCore.Qt.EditRole:
            col = index.column()
            if col == 0:
                self.temp_levels[index.row()].name = str(variant.toString())
            elif col == 1:
                self.temp_levels[index.row()].temp = variant.toInt()[0]
            self.solder_changed.emit()
            return True
        return False

    def remove_temp_level(self, index):
        tmp = self.temp_levels[index]
        del self.temp_levels[index]
        self.reset()
        self.solder_changed.emit()
        return tmp

    def add_temp_level(self, index, temp_level):
        self.temp_levels.insert(index.row() + 1, temp_level)
        set_colors(self.temp_levels)
        self.reset()
        self.solder_changed.emit()

    def setTempLevels(self, temp_levels):
        assert isinstance(temp_levels, list)
        self.temp_levels = temp_levels
        self.reset()


    def clear(self):
        self.temp_levels = list()
        self.reset()


class Plotter(FigureCanvas):
    """A canvas that updates itself every second with a new plot."""

    def __init__(self, parent, myapp, width, height, dpi):
        self.fig = Figure(figsize=(width, height), dpi=dpi)
        super(Plotter, self).__init__(self.fig)
        self.axes = self.fig.add_subplot(111)
        #self.fig.subplots_adjust(
          #left=0.1,
          #bottom=0.05,
          #right=0.9,
          #top=0.95,
          #wspace=0,
          #hspace=0
        #)

        self.axes.set_axis_bgcolor('white')
        self.axes.set_title(u'reflow profile', size=12)
        self.axes.set_xlabel(u'time (seconds)', size=12)
        self.axes.set_ylabel(u'temperature (°C)', size=12)
        self.axes.set_ymargin(0)
        self.axes.set_xmargin(0)

        self.setParent(parent)
        self.myapp = myapp
        self.solder = None

        self.plot_data, = self.axes.plot([], linewidth=1.0, color=(0,0,1), zorder=10)
        #self.selection_data, = self.axes.plot([], linewidth=1.0, color=(1,1,1), zorder=5)

        FigureCanvas.setSizePolicy(self,
            QtGui.QSizePolicy.Expanding,
            QtGui.QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)

        timer = QtCore.QTimer(self)

        QtCore.QObject.connect(timer, QtCore.SIGNAL("timeout()"), self.update_figure)
        timer.start(1000)
        self.updated = True

    def update_figure(self):
        if self.updated:
            self.updated = False
            self.axes.patches = list()
            self.axes.texts = list()
            self.x = list()
            self.y = list()

            self.x, self.y, self.xmax, self.ymax, self.used, self.unused = self.solder.calc_profile()

            for ix, (a, b)  in enumerate(zip(self.x[:-1], self.y[:-1])):
                slope = (self.y[ix+1] - b) / (self.x[ix+1] - a)
                if not (numpy.isnan(slope) or numpy.isinf(slope)):
                    origin = (a + 10, b)
                    annotation.slope_marker(origin, slope, ax=self.axes)

            self.plot_data.set_xdata(self.x)
            self.plot_data.set_ydata(self.y)

            self.axes.set_xbound(lower=0, upper=self.xmax + 20)
            self.axes.set_ybound(lower=0, upper=self.ymax + 20)

            self.axes.set_yticks(self.y)
            self.axes.set_xticks(self.x)

            #duration_widget = self.myapp.duration_widget

            #self.selection_data.set_xdata(array(da))
            #self.selection_data.set_ydata(array(db))

        self.fig.lines = lines = list()
        for temp_level in self.solder.temp_levels:
            if not temp_level.is_env:
                line = Line2D([0, self.xmax + 20], [temp_level.temp, temp_level.temp],
                    transform=self.axes.transData, figure=self.fig, color=str(temp_level.color.name()), label="name", zorder=1)
                lines.append(line)

        self.axes.legend(("Estimated profile",), loc=2)
        self.draw()

    def solder_changed(self):
        self.solder.changed = True
        self.updated = True

    def setData(self, solder):
        self.solder = solder
        self.updated = True


class AddRemoveWidget(QtGui.QWidget):
    def __init__(self, parent, with_upown=True):
        #super(AddRemoveWidget, self).__init__(parent)
        QtGui.QWidget.__init__(self, parent)
        self.add_button = QtGui.QPushButton(QtGui.QIcon.fromTheme("list-add"), "")
        self.remove_button = QtGui.QPushButton(QtGui.QIcon.fromTheme("list-remove"), "")

        sh = "QPushButton:disabled { background-color: #555555; }"
        self.remove_button.setStyleSheet(sh)
        self.add_button.setStyleSheet(sh)

        self._layout = QtGui.QVBoxLayout(self)

        self._layout.addWidget(self.add_button)
        self._layout.addWidget(self.remove_button)
        if with_upown:
            self.up_button = QtGui.QPushButton(QtGui.QIcon.fromTheme("go-up"), "")
            self.down_button = QtGui.QPushButton(QtGui.QIcon.fromTheme("go-down"), "")
            self._layout.addWidget(self.up_button)
            self._layout.addWidget(self.down_button)
            self.up_button.setStyleSheet(sh)
            self.down_button.setStyleSheet(sh)
        self._layout.addStretch(4)


class AddRemoveValueWidget(AddRemoveWidget):
    def __init__(self, parent):
        super(AddRemoveValueWidget, self).__init__(parent)
        self.value = QtGui.QSpinBox(self)
        self.value.setRange(-500, 500)
        self._layout.addWidget(self.value)


class ConstraintListModel(QtCore.QAbstractListModel):
    def __init__(self, parent=None, *args):
        """ datain: a list where each item is a row
        """
        super(ConstraintListModel, self).__init__(parent, *args)
        self.constraint_list = list()

    def rowCount(self, parent=QtCore.QModelIndex()):
        return len(self.constraint_list)

    def headerData(self, col, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            return QtCore.QVariant("Solder Paste")
        return QtCore.QVariant()

    def data(self, index, role):
        if index.isValid() and role == QtCore.Qt.DisplayRole:
            return QtCore.QVariant(index.row() + 1)
        else:
            return QtCore.QVariant()

    def append_constraint(self):
        self.constraint_list.append([[], 0])
        self.reset()

    def remove_constraint(self):
        del self.constraint_list[self.currentIndex().row()]
        self.reset()


class ConstraintWidget(QtGui.QWidget):
    solder_changed = QtCore.pyqtSignal()
    def __init__(self, name):
        super(ConstraintWidget, self).__init__()
        self.name = name

        self.spinbox_block = False

        self.constraint_model = ConstraintListModel(self) # constraint selection
        self.all_temp_levels = TempLevelModel(self) # temp_level selection pool
        self.selected_temp_levels = TempLevelModel(self) # selected temp_levels

        self.controls = AddRemoveValueWidget(self)
        self.constraint_controls = AddRemoveWidget(self, False)

        self.controls.add_button.setText(u"")
        self.controls.remove_button.setText(u"")

        self.constraint_controls.add_button.setText(u"")
        self.constraint_controls.remove_button.setText(u"")

        self.constraint_view = QtGui.QListView(self)
        self.constraint_view.setModel(self.constraint_model)

        self.all_temp_levels_view = QtGui.QListView(self)
        self.all_temp_levels_view.setModel(self.all_temp_levels)

        self.selected_temp_levels_view = QtGui.QListView(self)
        self.selected_temp_levels_view.setModel(self.selected_temp_levels)

        h = QtGui.QHBoxLayout()
        h.addWidget(self.constraint_view, 1)
        h.addWidget(self.constraint_controls, 1)
        h.addWidget(self.all_temp_levels_view, 3)
        h.addWidget(self.controls, 1)
        h.addWidget(self.selected_temp_levels_view, 3)

        self.controls.add_button.setIcon(QtGui.QIcon.fromTheme("go-next"))
        self.controls.remove_button.setIcon(QtGui.QIcon.fromTheme("go-previous"))
        self.setLayout(h)

        self.connect(
            self.constraint_view,
            QtCore.SIGNAL("clicked(QModelIndex)"),
            self._constraint_selected)

        self.connect(
            self.controls.add_button,
            QtCore.SIGNAL("clicked()"),
            self.add_temp_level_to_constraint)

        self.connect(
            self.controls.remove_button,
            QtCore.SIGNAL("clicked()"),
            self.remove_temp_level_from_constraint)

        self.connect(
            self.controls.up_button,
            QtCore.SIGNAL("clicked()"),
            self.temp_level_up)

        self.connect(
            self.controls.down_button,
            QtCore.SIGNAL("clicked()"),
            self.temp_level_down)

        self.connect(
            self.constraint_controls.add_button,
            QtCore.SIGNAL("clicked()"),
            self.add_constraint)

        self.connect(
            self.constraint_controls.remove_button,
            QtCore.SIGNAL("clicked()"),
            self.remove_constraint)

        self.connect(
            self.controls.value,
            QtCore.SIGNAL("valueChanged(int)"),
            self.constraint_value_changed)

        self.connect(
            self.selected_temp_levels_view,
            QtCore.SIGNAL("clicked(QModelIndex)"),
            self.selected_temp_levels_clicked)

    def setData(self, solder):
        self.solder = solder
        self.all_temp_levels.setTempLevels(solder.temp_levels)
        self._set_data(solder)
        self.set_controls()

        self.controls.up_button.setEnabled(False)
        self.controls.down_button.setEnabled(False)

    def set_controls(self):
        if not self.constraint_model.constraint_list:
            self.controls.value.setEnabled(False)
            self.constraint_controls.remove_button.setEnabled(False)
            self.controls.add_button.setEnabled(False)
            self.controls.remove_button.setEnabled(False)
            self.controls.up_button.setEnabled(False)
            self.controls.down_button.setEnabled(False)
        else:
            self.controls.value.setEnabled(True)
            self.constraint_controls.remove_button.setEnabled(True)
            self.controls.add_button.setEnabled(True)
            self.controls.remove_button.setEnabled(True)
            self.controls.up_button.setEnabled(True)
            self.controls.down_button.setEnabled(True)


    def selected_temp_levels_clicked(self, index):
        if index.isValid():
            self.controls.up_button.setEnabled(True)
            self.controls.down_button.setEnabled(True)


    def add_constraint(self):
        self.constraint_model.append_constraint()
        self.set_controls()
        self.solder_changed.emit()

    def _constraint_selected(self, index):
        raise NotImplementedError()

    def _set_data(self, solder):
        raise NotImplementedError()

    def add_temp_level_to_constraint(self):
        src_row = self.all_temp_levels_view.currentIndex().row()
        temp_level = self.all_temp_levels.temp_levels[src_row]
        self.selected_temp_levels.temp_levels.append(temp_level)
        self.selected_temp_levels.reset()
        self.selected_temp_levels_view.setCurrentIndex(self.selected_temp_levels.index(len(self.selected_temp_levels.temp_levels)-1,0))
        self.solder_changed.emit()

    def remove_temp_level_from_constraint(self):
        del self.selected_temp_levels.temp_levels[self.selected_temp_levels_view.currentIndex().row()]
        self.selected_temp_levels.reset()
        self.selected_temp_levels_view.clearSelection()
        self.solder_changed.emit()

    def remove_constraint(self):
        src_row = self.all_temp_levels_view.currentIndex().row()
        del self.constraint_model.constraint_list[src_row]
        self.constraint_model.reset()
        self.selected_temp_levels.clear()
        self.set_controls()
        self.solder_changed.emit()

    def constraint_value_changed(self, value):
        if self.spinbox_block:
            self.spinbox_block = False
            return
        src_index = self.constraint_view.currentIndex().row()
        self.constraint_model.constraint_list[src_index][1] = value
        self.solder_changed.emit()

    def slot_temp_level_removed(self, temp_level):
        deletes = deque()
        ix = 0
        for temp_levels, v in self.constraint_model.constraint_list:
            if temp_level in temp_levels:
                deletes.appendleft(ix)
            ix += 1
        for i in deletes:
            del self.constraint_model.constraint_list[i]
        self.reset()
        self.solder_changed.emit()

    def temp_level_up(self):
        dst_row = self.selected_temp_levels_view.currentIndex().row()
        self.selected_temp_levels.temp_levels[dst_row - 1], self.selected_temp_levels.temp_levels[dst_row] = self.selected_temp_levels.temp_levels[dst_row], self.selected_temp_levels.temp_levels[dst_row - 1]
        self.selected_temp_levels.reset()
        self.solder_changed.emit()

    def temp_level_down(self):
        dst_row = self.selected_temp_levels_view.currentIndex().row()
        self.selected_temp_levels.temp_levels[dst_row], self.selected_temp_levels.temp_levels[dst_row + 1] = self.selected_temp_levels.temp_levels[dst_row + 1], self.selected_temp_levels.temp_levels[dst_row]
        self.selected_temp_levels.reset()
        self.solder_changed.emit()


class DurationConstraintWidget(ConstraintWidget):

    def _set_data(self, solder):
        self.spinbox_block = True
        self.constraint_model.constraint_list = solder.durations
        self.constraint_model.reset()
        ix = self.constraint_model.index(0, 0)
        self._constraint_selected(ix)
        self.constraint_view.setCurrentIndex(ix)

    def _constraint_selected(self, index):
        if index.isValid():
            self.spinbox_block = True
            temp_levels, value = self.constraint_model.constraint_list[index.row()]
            self.selected_temp_levels.setTempLevels(temp_levels)
            self.controls.value.setValue(value)
        else:
            self.spinbox_block = True
            self.selected_temp_levels.setTempLevels(list())
            self.controls.value.setValue(0)



class OvenControlsWidget(QtGui.QWidget):
    def __init__(self, parent=None):
        super(OvenControlsWidget, self).__init__(parent)

        self.left = QtGui.QWidget(self)

        self.temp_lcd = QtGui.QLCDNumber(self)
        self.time_lcd = QtGui.QLCDNumber(self)

        self.time_lcd.setDigitCount(3)
        self.temp_lcd.setDigitCount(3)

        palette = QtGui.QPalette()
        palette.setColor(QtGui.QPalette.WindowText, QtCore.Qt.black)
        self.temp_lcd.setPalette(palette)
        self.time_lcd.setPalette(palette)
        self.time_lcd.setSmallDecimalPoint(False)
        self.temp_lcd.setSmallDecimalPoint(False)

        self.temp_lcd.setSegmentStyle(2)
        self.time_lcd.setSegmentStyle(2)
        self.time_lcd.display("000")
        self.temp_lcd.display("142")

        self.temp_label = QtGui.QLabel("Time", self)
        self.time_label = QtGui.QLabel("Temp", self)
        self.temp_label.setBuddy(self.temp_lcd)
        self.time_label.setBuddy(self.time_lcd)

        self.sicon = QtGui.QIcon.fromTheme("media-playback-start")
        self.picon = QtGui.QIcon.fromTheme("media-playback-pause")
        self.start_button = QtGui.QPushButton(self.sicon, "start")
        self.start_button.setCheckable(True)

        layout = QtGui.QHBoxLayout(self.left)
        layout.addWidget(self.time_label)
        layout.addWidget(self.time_lcd)
        layout.addWidget(self.temp_label)
        layout.addWidget(self.temp_lcd)
        layout.addWidget(self.start_button)

        layout2 = QtGui.QHBoxLayout()
        self.temp_level_widget = TempLevelWidget(self, True)
        layout2.addWidget(self.temp_level_widget, 2)
        layout2.addWidget(self.left, 4)
        self.setLayout(layout2)


        self.connect(
            self.start_button,
            QtCore.SIGNAL("clicked()"),
            self.toggle_button)

    def toggle_button(self):
        if self.start_button.isChecked():
            self.start_button.setIcon(self.picon)
        else:
            self.start_button.setIcon(self.sicon)


class RateConstraintWidget(ConstraintWidget):

    def _set_data(self, solder):
        self.spinbox_block = True
        self.constraint_model.constraint_list = solder.rates
        self.constraint_model.reset()
        ix = self.constraint_model.index(0, 0)
        self._constraint_selected(ix)
        self.constraint_view.setCurrentIndex(ix)


    def _constraint_selected(self, index):
        if index.isValid():
            self.spinbox_block = True
            temp_levels, value = self.constraint_model.constraint_list[index.row()]
            self.selected_temp_levels.setTempLevels(temp_levels)
            self.controls.value.setValue(value)
        else:
            self.spinbox_block = True
            self.selected_temp_levels.setTempLevels([])
            self.controls.value.setValue(0)

class SolderWidget(QtGui.QWidget):
    def __init__(self, parent, readonly=False):
        super(SolderWidget, self).__init__(parent)
        self.solder_model = SolderListModel(self)
        self.solder_view = QtGui.QListView()
        self.solder_view.setModel(self.solder_model)
        self.solder_controls = AddRemoveWidget(self, False)

        layout = QtGui.QHBoxLayout(self)
        layout.addWidget(self.solder_view, 3)
        layout.addWidget(self.solder_controls, 1)


        self.connect(
            self.solder_controls.add_button,
            QtCore.SIGNAL("clicked()"),
            self.solder_model.create_solder)

        self.solder_view.setCurrentIndex(self.solder_model.index(0,0))


class TempLevelWidget(QtGui.QWidget):
    temp_level_removed = QtCore.pyqtSignal(TempLevel)
    solder_changed = QtCore.pyqtSignal()

    def __init__(self, parent, readonly=False):
        super(TempLevelWidget, self).__init__(parent)
        self.temp_level_model = TempLevelModel(self)

        self.temp_level_view = QtGui.QTableView()
        self.temp_level_view.setModel(self.temp_level_model)
        self.temp_level_view.verticalHeader().setVisible(False)
        self.temp_level_view.resizeColumnsToContents()
        self.temp_level_view.horizontalHeader().setStretchLastSection(True)
        self.temp_level_view.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)

        h = QtGui.QHBoxLayout()
        h.addWidget(self.temp_level_view)
        self.setLayout(h)

        self.connect(
            self.temp_level_view,
            QtCore.SIGNAL("clicked(QModelIndex)"),
            self.temp_level_selected)

        if not readonly:
            self.controls = AddRemoveWidget(self)
            h.addWidget(self.controls)

            self.connect(
                self.controls.add_button,
                QtCore.SIGNAL("clicked()"),
                self.add_temp_level)

            self.connect(
                self.controls.remove_button,
                QtCore.SIGNAL("clicked()"),
                self.remove_temp_level)

            self.connect(
                self.controls.up_button,
                QtCore.SIGNAL("clicked()"),
                self.temp_level_up)

            self.connect(
                self.controls.down_button,
                QtCore.SIGNAL("clicked()"),
                self.temp_level_down)

            self.connect(
                self.temp_level_model,
                QtCore.SIGNAL("solder_changed()"),
                self._solder_changed)

    def _solder_changed(self):
        self.solder_changed.emit()


    def setData(self, solder):
        self.temp_level_model.setTempLevels(solder.temp_levels)
        self.temp_level_view.resizeColumnsToContents()


    def add_temp_level(self):
        index = self.temp_level_view.currentIndex()
        self.temp_level_model.add_temp_level(index, TempLevel("new " + str(self.temp_level_model.rowCount(None)), 0))
        self.temp_level_view.setCurrentIndex(self.temp_level_model.index(index.row() + 1, 0))
        self.plotter.solder.changed = True
        self.solder_changed.emit()


    def remove_temp_level(self):
        self.temp_level_removed.emit(
            self.temp_level_model.remove_temp_level(
                self.temp_level_view.currentIndex().row()))
        self.solder_changed.emit()

    def temp_level_up(self):
        dst_row = self.temp_level_view.currentIndex().row()
        self.temp_level_model.temp_levels[dst_row - 1], self.temp_level_model.temp_levels[dst_row] = self.temp_level_model.temp_levels[dst_row], self.temp_level_model.temp_levels[dst_row - 1]
        self.temp_level_model.reset()
        self.solder_changed.emit()

    def temp_level_down(self):
        dst_row = self.selected_temp_levels_view.currentIndex().row()
        self.temp_level_model.temp_levels[dst_row], self.temp_level_model.temp_levels[dst_row + 1] = self.temp_level_model.temp_levels[dst_row + 1], self.temp_level_model.temp_levels[dst_row]
        self.temp_level_model.reset()
        self.solder_changed.emit()


    def temp_level_selected(self, index):
        if index.isValid():
            row = index.row()
            if not self.readonly:
                is_env = self.temp_level_model.temp_levels[row].is_env
                #is_end = row == len(self.temp_level_model.temp_levels) - 1
                #self.controls.add_button.setEnabled(not is_end)
                self.controls.remove_button.setEnabled(not is_env)


class Report(QtGui.QWidget):
    def __init__(self, parent=None):
        super(Report, self).__init__(parent)


class ApplicationWindow(QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.dpi = 100

        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setWindowTitle("application main window")

        self.file_menu = QtGui.QMenu('&File', self)
        self.file_menu.addAction('&Create profile header', self.create_header,
                                 QtCore.Qt.CTRL + QtCore.Qt.Key_C)
        self.file_menu.addAction('&Save solder', self.save_solder,
                                 QtCore.Qt.CTRL + QtCore.Qt.Key_S)
        self.file_menu.addAction('S&ave plot', self.save_plot,
                                 QtCore.Qt.CTRL + QtCore.Qt.Key_A)
        self.file_menu.addAction('&Quit', self.fileQuit,
                                 QtCore.Qt.CTRL + QtCore.Qt.Key_Q)

        self.menuBar().addMenu(self.file_menu)

        self.view_menu = QtGui.QMenu('&View', self)
        self.profile_view_action = self.view_menu.addAction("&Profile View", self.open_profile_view,
            QtCore.Qt.CTRL + QtCore.Qt.Key_P)
        self.controls_view_action = self.view_menu.addAction("&Oven Controls View", self.open_controls_view,
            QtCore.Qt.CTRL + QtCore.Qt.Key_O)


        self.view_group = QtGui.QActionGroup(self)
        self.view_group.setExclusive(True)

        self.view_group.addAction(self.controls_view_action)
        self.view_group.addAction(self.profile_view_action)

        self.profile_view_action.setCheckable(True)
        self.controls_view_action.setCheckable(True)

        #self.connect(self.profile_view_action,
            #QtCore.SIGNAL("triggered()"),
            #self.open_profile_view)

        #self.connect(self.controls_view_action,
            #QtCore.SIGNAL("triggered()"),
            #self.open_controls_view)

        self.profile_view_action.setChecked(True)

        self.menuBar().addMenu(self.view_menu)

        self.help_menu = QtGui.QMenu('&Help', self)
        self.menuBar().addSeparator()
        self.menuBar().addMenu(self.help_menu)

        self.help_menu.addAction('&About', self.about)



        self.tab_widget = QtGui.QTabWidget(self)
        self.temp_level_widget = TempLevelWidget(self)
        self.duration_widget = DurationConstraintWidget(u"Duration (s)")
        self.rate_widget = RateConstraintWidget(u"Rate (°C/s)")
        self.tab_widget.addTab(self.temp_level_widget, u"Temperature Levels")
        self.tab_widget.addTab(self.duration_widget, u"Duration (s)")
        self.tab_widget.addTab(self.rate_widget, u"Rate (°C/s)")

        self.plotter = Plotter(self, self, width=5, height=4, dpi=self.dpi)
        self.controls_widget = OvenControlsWidget(self)
        self.controls_widget.setVisible(False)



        self.connect(
            self.duration_widget,
            QtCore.SIGNAL("solder_changed()"),
            self.plotter.solder_changed)

        self.connect(
            self.rate_widget,
            QtCore.SIGNAL("solder_changed()"),
            self.plotter.solder_changed)

        self.connect(
            self.temp_level_widget,
            QtCore.SIGNAL("solder_changed()"),
            self.plotter.solder_changed)

        self.connect(
            self.duration_widget,
            QtCore.SIGNAL("solder_changed()"),
            self.plotter.solder_changed)

        self.connect(
            self.rate_widget,
            QtCore.SIGNAL("solder_changed()"),
            self.plotter.solder_changed)

        self.solder_widget = SolderWidget(self)

        self.connect(
            self.solder_widget.solder_view,
            QtCore.SIGNAL("clicked(QModelIndex)"),
            self.solder_selected)


        self.settings_widget = QtGui.QWidget(self)
        pl = QtGui.QHBoxLayout(self.settings_widget)
        pl.addWidget(self.solder_widget, 1)
        pl.addWidget(self.tab_widget, 3)

        self.splitter = QtGui.QSplitter(QtCore.Qt.Vertical, self)

        self.plotter_splitter = QtGui.QSplitter(self)
        self.profile_log = QtGui.QTextEdit(self)

        self.solder_selected(self.solder_widget.solder_model.index(0,0))


        self.plotter_splitter.addWidget(self.plotter)
        self.plotter_splitter.addWidget(self.profile_log)

        self.splitter.addWidget(self.settings_widget)
        self.splitter.addWidget(self.controls_widget)
        self.splitter.addWidget(self.plotter_splitter)
        self.splitter.setStretchFactor(0, 2)
        self.splitter.setStretchFactor(1, 2)
        self.splitter.setStretchFactor(2, 8)

        self.setCentralWidget(self.splitter)

        self.statusBar().showMessage("I'm in reflow heaven", 2000)

        self.temp_level_widget.temp_level_removed.connect(self.duration_widget.slot_temp_level_removed)
        self.temp_level_widget.temp_level_removed.connect(self.rate_widget.slot_temp_level_removed)

    def getPlotter(self):
        return self.plotter

    def create_header(self):
        x_list = list()
        y_list = list()
        for solder in self.solder_model.listdata:
            x, y, xmax, ymax, duration_points, rate_points = solder.calc_profile()
            x_list.append(x)
            y_list.append(y)
            #print "packet", repr(create_profile_packet(x, y))

        create_profile_header(x_list, y_list)

    def solder_selected(self, index):
        if index.isValid():
            solder = self.solder_widget.solder_model.listdata[index.row()]
            self.temp_level_widget.setData(solder)
            self.duration_widget.setData(solder)
            self.rate_widget.setData(solder)
            self.plotter.setData(solder)
            self.controls_widget.temp_level_widget.setData(solder)
            solder.log_message.connect(self.profile_log.setPlainText)

    def open_controls_view(self):
        self.controls_widget.show()
        self.settings_widget.hide()

    def open_profile_view(self):
        self.controls_widget.hide()
        self.settings_widget.show()

    def save_plot(self):
        file_choices = "PNG (*.png)|*.png"

        filename = QtGui.QFileDialog.getSaveFileName(self, 'Save File', 'qtplot.png')
        self.plotter.print_figure(str(filename), dpi=self.dpi)

    def save_solder(self):
        self.plotter.solder.save("foo")
        self.solder_widget.solder_model.reload()

    def fileQuit(self):
        self.close()

    def closeEvent(self, ce):
        self.fileQuit()

    def about(self):
        QtGui.QMessageBox.about(self, "About %s" % progname,
        u"%(prog)s version %(version)s\n" \
        u"Copyright \N{COPYRIGHT SIGN} 2012 Stefan Kögl\n\n" \
        u"reflowctl frontend" % {"prog": progname, "version": progversion})


def main():

    qApp = QtGui.QApplication(sys.argv)

    aw = ApplicationWindow()
    aw.setWindowTitle("%s" % progname)
    aw.show()
    sys.exit(qApp.exec_())


if __name__ == '__main__':
    main()