provide setup for MLZ_Amagnet to be used @PSI soon

Also implement lots of fixes and improvements.

fixes: #3381

Change-Id: Ibe6664da00756ae5813b90f190295045808b2ff0

secop/gui/params/__init__.py

@@ -0,0 +1,182 @@
+#  -*- coding: utf-8 -*-
+# *****************************************************************************
+# Copyright (c) 2015-2016 by the authors, see LICENSE
+#
+# 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.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#   Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
+#
+# *****************************************************************************
+
+from PyQt4.QtGui import QWidget, QLabel, QPushButton as QButton, QLineEdit, QMessageBox, QCheckBox, QSizePolicy
+from PyQt4.QtCore import pyqtSignature as qtsig, Qt, pyqtSignal
+
+from secop.gui.util import loadUi
+from secop.datatypes import *
+
+
+class ParameterWidget(QWidget):
+    setRequested = pyqtSignal(str, str, str)  # module, parameter, target
+    cmdRequested = pyqtSignal(str, str, list)  # module, command, args
+
+    def __init__(self,
+                 module,
+                 paramcmd,
+                 datatype=None,
+                 initvalue=None,
+                 readonly=True,
+                 parent=None):
+        super(ParameterWidget, self).__init__(parent)
+        self._module = module
+        self._paramcmd = paramcmd
+        self._datatype = datatype
+        self._readonly = readonly
+
+        self._load_ui(initvalue)
+
+    def _load_ui(self, initvalue):
+        # load ui file, set initvalue to right widget
+        pass
+
+    def updateValue(self, valuestr):
+        # async !
+        pass
+
+
+class GenericParameterWidget(ParameterWidget):
+
+    def _load_ui(self, initvalue):
+        # using two QLineEdits for current and target value
+        loadUi(self, 'parambuttons.ui')
+
+        if self._readonly:
+            self.setPushButton.setEnabled(False)
+            self.setLineEdit.setEnabled(False)
+        else:
+            self.setLineEdit.returnPressed.connect(
+                self.on_setPushButton_clicked)
+        self.updateValue(str(initvalue))
+
+    def on_setPushButton_clicked(self):
+        self.setRequested.emit(self._module, self._paramcmd,
+                               self.setLineEdit.text())
+
+    def updateValue(self, valuestr):
+        self.currentLineEdit.setText(valuestr)
+
+
+class EnumParameterWidget(GenericParameterWidget):
+
+    def _load_ui(self, initvalue):
+        # using two QLineEdits for current and target value
+        loadUi(self, 'parambuttons_select.ui')
+
+        # transfer allowed settings from datatype to comboBoxes
+        self._map = {}  # maps index to enumstring
+        self._revmap = {}  # maps enumstring to index
+        index = 0
+        for data, entry in sorted(self._datatype.entries.items()):
+            self.setComboBox.addItem(entry, data)
+            self._map[index] = entry
+            self._revmap[entry] = index
+            self._revmap[data] = index
+            index += 1
+        if self._readonly:
+            self.setLabel.setEnabled(False)
+            self.setComboBox.setEnabled(False)
+            self.setLabel.setHidden(True)
+            self.setComboBox.setHidden(True)
+        else:
+            self.setComboBox.activated.connect(self.on_setPushButton_clicked)
+
+        self.updateValue(str(initvalue))
+
+    def on_setPushButton_clicked(self):
+        self.setRequested.emit(
+            self._module, self._paramcmd, str(
+                self._datatype.reversed[
+                    self._map[
+                        self.setComboBox.currentIndex()]]))
+
+    def updateValue(self, valuestr):
+        try:
+            self.currentLineEdit.setText(
+                self._datatype.entries.get(
+                    int(valuestr), valuestr))
+        except ValueError:
+            self.currentLineEdit.setText('undefined Value: %r' % valuestr)
+
+
+class GenericCmdWidget(ParameterWidget):
+
+    def _load_ui(self, initvalue):
+        # using two QLineEdits for current and target value
+        loadUi(self, 'cmdbuttons.ui')
+
+        self.cmdLineEdit.setText('')
+        self.cmdLineEdit.setEnabled(self.datatype.argtypes is not None)
+        self.cmdLineEdit.returnPressed.connect(
+            self.on_cmdPushButton_clicked)
+
+    def on_cmdPushButton_clicked(self):
+        # wait until command complete before retrying
+        self.cmdPushButton.setEnabled(False)
+        self.cmdRequested.emit(
+            self._module,
+            self._paramcmd,
+            self._datatype.from_string(
+                self.cmdLineEdit.text()))
+
+    def updateValue(self, valuestr):
+        # open dialog and show value, if any.
+        # then re-activate the command button
+        self.cmdPushButton.setEnabled(True)
+
+
+def ParameterView(module,
+                  paramcmd,
+                  datatype=None,
+                  initvalue=None,
+                  readonly=True,
+                  parent=None):
+    # depending on datatype returns an initialized widget fit for display and
+    # interaction
+
+    if datatype is not None:
+        if datatype.IS_COMMAND:
+            return GenericCmdWidget(
+                module,
+                paramcmd,  # name of command
+                datatype,
+                initvalue,  # not used for comands
+                readonly,  # not used for commands
+                parent)
+        if isinstance(datatype, EnumType):
+            return EnumParameterWidget(
+                module,
+                paramcmd,  # name of parameter
+                datatype,
+                initvalue,
+                readonly,
+                parent)
+
+    return GenericParameterWidget(
+        module,
+        paramcmd,  # name of parameter
+        datatype,
+        initvalue,
+        readonly,
+        parent)