Merge pull request #586 from acq4/parametertree-updates
Parametertree updates
This commit is contained in:
Luke Campagnola
GitHub
commit
7d992a56ee
@ -162,7 +162,11 @@ class Parameter(QtCore.QObject):
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'title': None,
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#'limits': None, ## This is a bad plan--each parameter type may have a different data type for limits.
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}
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value = opts.get('value', None)
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name = opts.get('name', None)
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self.opts.update(opts)
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self.opts['value'] = None # will be set later.
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self.opts['name'] = None
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self.childs = []
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self.names = {} ## map name:child
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@ -172,17 +176,19 @@ class Parameter(QtCore.QObject):
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self.blockTreeChangeEmit = 0
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#self.monitoringChildren = False ## prevent calling monitorChildren more than once
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if 'value' not in self.opts:
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self.opts['value'] = None
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if 'name' not in self.opts or not isinstance(self.opts['name'], basestring):
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if not isinstance(name, basestring):
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raise Exception("Parameter must have a string name specified in opts.")
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self.setName(opts['name'])
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self.setName(name)
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self.addChildren(self.opts.get('children', []))
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if 'value' in self.opts and 'default' not in self.opts:
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self.opts['default'] = self.opts['value']
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self.opts['value'] = None
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if value is not None:
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self.setValue(value)
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if 'default' not in self.opts:
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self.opts['default'] = None
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self.setDefault(self.opts['value'])
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## Connect all state changed signals to the general sigStateChanged
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self.sigValueChanged.connect(lambda param, data: self.emitStateChanged('value', data))
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@ -647,18 +653,19 @@ class Parameter(QtCore.QObject):
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"""Return a child parameter.
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Accepts the name of the child or a tuple (path, to, child)
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Added in version 0.9.9. Ealier versions used the 'param' method, which is still
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implemented for backward compatibility."""
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Added in version 0.9.9. Earlier versions used the 'param' method, which is still
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implemented for backward compatibility.
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"""
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try:
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param = self.names[names[0]]
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except KeyError:
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raise Exception("Parameter %s has no child named %s" % (self.name(), names[0]))
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raise KeyError("Parameter %s has no child named %s" % (self.name(), names[0]))
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if len(names) > 1:
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return param.param(*names[1:])
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return param.child(*names[1:])
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else:
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return param
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def param(self, *names):
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# for backward compatibility.
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return self.child(*names)
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@ -1,5 +1,7 @@
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from ..pgcollections import OrderedDict
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import numpy as np
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import copy
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class SystemSolver(object):
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"""
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@ -73,6 +75,12 @@ class SystemSolver(object):
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self.__dict__['_currentGets'] = set()
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self.reset()
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def copy(self):
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sys = type(self)()
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sys.__dict__['_vars'] = copy.deepcopy(self.__dict__['_vars'])
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sys.__dict__['_currentGets'] = copy.deepcopy(self.__dict__['_currentGets'])
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return sys
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def reset(self):
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"""
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Reset all variables in the solver to their default state.
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@ -167,6 +175,16 @@ class SystemSolver(object):
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elif constraint == 'fixed':
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if 'f' not in var[3]:
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raise TypeError("Fixed constraints not allowed for '%s'" % name)
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# This is nice, but not reliable because sometimes there is 1 DOF but we set 2
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# values simultaneously.
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# if var[2] is None:
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# try:
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# self.get(name)
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# # has already been computed by the system; adding a fixed constraint
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# # would overspecify the system.
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# raise ValueError("Cannot fix parameter '%s'; system would become overconstrained." % name)
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# except RuntimeError:
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# pass
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var[2] = constraint
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elif isinstance(constraint, tuple):
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if 'r' not in var[3]:
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@ -177,7 +195,7 @@ class SystemSolver(object):
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raise TypeError("constraint must be None, True, 'fixed', or tuple. (got %s)" % constraint)
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# type checking / massaging
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if var[1] is np.ndarray:
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if var[1] is np.ndarray and value is not None:
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value = np.array(value, dtype=float)
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elif var[1] in (int, float, tuple) and value is not None:
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value = var[1](value)
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@ -185,9 +203,9 @@ class SystemSolver(object):
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# constraint checks
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if constraint is True and not self.check_constraint(name, value):
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raise ValueError("Setting %s = %s violates constraint %s" % (name, value, var[2]))
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# invalidate other dependent values
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if var[0] is not None:
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if var[0] is not None or value is None:
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# todo: we can make this more clever..(and might need to)
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# we just know that a value of None cannot have dependencies
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# (because if anyone else had asked for this value, it wouldn't be
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@ -237,6 +255,31 @@ class SystemSolver(object):
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for k in self._vars:
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getattr(self, k)
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def checkOverconstraint(self):
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"""Check whether the system is overconstrained. If so, return the name of
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the first overconstrained parameter.
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Overconstraints occur when any fixed parameter can be successfully computed by the system.
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(Ideally, all parameters are either fixed by the user or constrained by the
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system, but never both).
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"""
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for k,v in self._vars.items():
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if v[2] == 'fixed' and 'n' in v[3]:
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oldval = v[:]
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self.set(k, None, None)
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try:
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self.get(k)
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return k
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except RuntimeError:
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pass
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finally:
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self._vars[k] = oldval
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return False
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def __repr__(self):
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state = OrderedDict()
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for name, var in self._vars.items():
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@ -378,4 +421,4 @@ if __name__ == '__main__':
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camera.solve()
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print(camera.saveState())
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@ -462,12 +462,15 @@ class GroupParameter(Parameter):
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instead of a button.
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"""
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itemClass = GroupParameterItem
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sigAddNew = QtCore.Signal(object, object) # self, type
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def addNew(self, typ=None):
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"""
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This method is called when the user has requested to add a new item to the group.
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By default, it emits ``sigAddNew(self, typ)``.
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"""
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raise Exception("Must override this function in subclass.")
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self.sigAddNew.emit(self, typ)
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def setAddList(self, vals):
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"""Change the list of options available for the user to add to the group."""
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@ -605,6 +608,7 @@ class ActionParameterItem(ParameterItem):
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ParameterItem.__init__(self, param, depth)
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self.layoutWidget = QtGui.QWidget()
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self.layout = QtGui.QHBoxLayout()
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self.layout.setContentsMargins(0, 0, 0, 0)
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self.layoutWidget.setLayout(self.layout)
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self.button = QtGui.QPushButton(param.name())
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#self.layout.addSpacing(100)
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