--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/client.py	Thu Feb 28 18:19:21 2019 +0100
@@ -0,0 +1,219 @@
+#!/usr/bin/env python3
+
+import arguments
+import os
+import os.path as path
+import sys
+
+import PyQt5.QtWidgets as wid
+import PyQt5.QtCore as core
+
+from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
+from matplotlib.figure import Figure
+
+class Creds:
+    user = ''
+    password = ''
+    addr = ''
+
+class ClientConfigDialog(wid.QDialog):
+    addr = None
+    user = None
+    password = None
+    defaults = False
+
+    def __init__(self, parent, defaults=False):
+        super().__init__(parent)
+        self.defaults = defaults
+
+    def show_dialog(self):
+        vbox = wid.QVBoxLayout(self)
+        
+        self.addr = wid.QLineEdit()
+        self.addr.readOnly = False
+        self.addr.setText(self.load_default('addr'))
+        self.user = wid.QLineEdit()
+        self.user.readOnly = False
+        self.user.setText(self.load_default('user'))
+        self.password = wid.QLineEdit()
+        self.password.readOnly = False
+        self.password.setText(self.load_default('password'))
+        self.password.setEchoMode(wid.QLineEdit.Password)
+
+        if self.defaults and self.addr.text() and self.user.text() and self.password.text():
+            self.finished.emit(1)
+            self.accepted.emit()
+            return
+
+        hbox_addr = wid.QHBoxLayout()
+        hbox_addr.addWidget(wid.QLabel('Address of server: '))
+        hbox_addr.addWidget(self.addr)
+
+        hbox_user = wid.QHBoxLayout()
+        hbox_user.addWidget(wid.QLabel('Username: '))
+        hbox_user.addWidget(self.user)
+
+        hbox_password = wid.QHBoxLayout()
+        hbox_password.addWidget(wid.QLabel('Password: '))
+        hbox_password.addWidget(self.password)
+
+        ok = wid.QPushButton('OK')
+        ok.clicked.connect(self.ok_clicked)
+        ok.clicked.connect(super().done)
+        vbox.addLayout(hbox_addr)
+        vbox.addLayout(hbox_user)
+        vbox.addLayout(hbox_password)
+        vbox.addWidget(ok)
+
+        self.setVisible(True)
+
+
+    default_addr_file = '.config/stex/'
+
+    def load_default(self, id):
+        try:
+            home = os.environ.get('HOME')
+            if not home:
+                home = path.join('/home/', os.environ.get('USER'))
+            with open(path.join(home, self.default_addr_file, id), 'r') as f:
+                return f.readline()
+        except Exception as e:
+            sys.stderr.write("Couldn't read file: {}\n".format(e))
+            return ''
+    
+    def save_default(self, id, val):
+        try:
+            home = os.environ.get('HOME')
+            if not home:
+                home = path.join('/home/', os.environ.get('USER'))
+            da = path.join(home, self.default_addr_file, id)
+            os.makedirs(path.dirname(da), exist_ok=True)
+            f = open(da, 'w' if os.access(da, os.F_OK) else 'x')
+            f.write(val)
+        except Exception as e:
+            sys.stderr.write("Couldn't write file: {}\n".format(e))
+            return
+
+    def ok_clicked(self):
+        self.save_default('addr', self.addr.text())
+        self.save_default('user', self.user.text())
+        self.save_default('password', self.password.text())
+
+    def creds(self):
+        creds = Creds()
+        creds.user = self.user.text()
+        creds.password = self.password.text()
+        creds.addr = self.addr.text()
+        return creds
+
+class StockGraph(FigureCanvas):
+    fig = None
+    axes = None
+    sym = ''
+
+    MAX_LEN = 500
+    XAXIS = [i for i in range(0, MAX_LEN)]
+    history = [0 for i in range(0, MAX_LEN)]
+
+    def __init__(self, sym, dim):
+        self.sym = sym
+        self.fig = Figure(figsize=(dim or (200,100)))
+        self.axes = self.fig.add_subplot(111)
+        self.axes.grid(True)
+        self.axes.set_xlim(0, self.MAX_LEN)
+
+        super().__init__(self.fig)
+        super().setSizePolicy(wid.QSizePolicy.Expanding, wid.QSizePolicy.Expanding)
+        super().updateGeometry()
+
+    def update_stock(self, value):
+        self.history.append(value)
+        self.history[0:] = self.history[1:]
+        self.plot()
+
+    def plot(self):
+        self.axes.set_title(self.sym)
+        self.axes.plot(self.XAXIS, self.history)
+        self.draw()
+
+class StockWidget(wid.QWidget):
+    graph = None
+
+    def __init__(self, graph):
+        super().__init__()
+        self.graph = graph
+
+        mainvbox = wid.QVBoxLayout(self)
+        mainvbox.addWidget(self.graph)
+        mainvbox.addLayout(self.init_buttonbox())
+        self.update(5000)
+        self.show()
+
+    def init_buttonbox(self):
+        buy = wid.QPushButton('  BUY   ')
+        sell = wid.QPushButton('  SELL  ')
+        self.current_state = wid.QLineEdit()
+        self.current_state.setReadOnly(True)
+        self.current_state.setAlignment(core.Qt.AlignCenter)
+
+        hbox = wid.QHBoxLayout()
+        hbox.addWidget(buy)
+        hbox.addWidget(sell)
+        hbox.addWidget(self.current_state)
+        return hbox
+
+    def update(self, val):
+        self.graph.update_stock(val)
+        self.current_state.setText('{} pc / {} ø/pc / {} ø'.format('?', val/100, val/100))
+
+class Client(arguments.BaseArguments, wid.QWidget):
+    _doc = """
+    Usage:
+        stex [options]
+
+    Options
+        --defaults      Use cached defaults if available.
+    """
+
+    creds = Creds()
+
+    def __init__(self):
+        super(wid.QWidget, self).__init__()
+        super(arguments.BaseArguments, self).__init__(doc=self._doc)
+
+        ccd = ClientConfigDialog(self, defaults=self.defaults)
+        ccd.accepted.connect(lambda: self.set_creds(ccd.creds()))
+        ccd.accepted.connect(self.start_main_window)
+        ccd.show_dialog()
+
+    def set_creds(self, creds):
+        self.creds = creds
+
+    def start_main_window(self):
+        mainvbox = wid.QVBoxLayout(self)
+
+        hbox1 = wid.QHBoxLayout()
+        sg1 = StockWidget(StockGraph('ABCD', None))
+        sg2 = StockWidget(StockGraph('EFGH', None))
+        hbox1.addWidget(sg1)
+        hbox1.addWidget(sg2)
+
+        hbox2 = wid.QHBoxLayout()
+        sg3 = StockWidget(StockGraph('ABCD', None))
+        sg4 = StockWidget(StockGraph('ABCD', None))
+        hbox2.addWidget(sg3)
+        hbox2.addWidget(sg4)
+
+        mainvbox.addLayout(hbox1)
+        mainvbox.addLayout(hbox2)
+
+        self.show()
+
+
+def main():
+    app = wid.QApplication(sys.argv)
+    client = Client()
+    sys.exit(app.exec_())
+
+if __name__ == '__main__':
+    main()