Parametertree updates:
- fixes for saveState / restoreState (better handling of custom parameter classes) - added method GroupParameter.setAddList - ListParameter now remembers its value even if its list is cleared and rebuilt - added ActionParameter (buttons) and TextParameter
This commit is contained in:
Luke Campagnola
parent
32311351f1
commit
79e4775165
@ -3,25 +3,29 @@ import collections, os, weakref, re
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from .ParameterItem import ParameterItem
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PARAM_TYPES = {}
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PARAM_NAMES = {}
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def registerParameterType(name, cls, override=False):
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global PARAM_TYPES
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if name in PARAM_TYPES and not override:
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raise Exception("Parameter type '%s' already exists (use override=True to replace)" % name)
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PARAM_TYPES[name] = cls
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PARAM_NAMES[cls] = name
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class Parameter(QtCore.QObject):
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"""
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Tree of name=value pairs (modifiable or not)
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- Value may be integer, float, string, bool, color, or list selection
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- Optionally, a custom widget may be specified for a property
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- Any number of extra columns may be added for other purposes
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- Any values may be reset to a default value
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- Parameters may be grouped / nested
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- Parameter may be subclassed to provide customized behavior.
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A Parameter is the basic unit of data in a parameter tree. Each parameter has
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a name, a type, a value, and several other properties that modify the behavior of the
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Parameter. Parameters may have parent / child / sibling relationships to construct
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organized hierarchies. Parameters generally do not have any inherent GUI or visual
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interpretation; instead they manage ParameterItem instances which take care of
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display and user interaction.
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Note: It is fairly uncommon to use the Parameter class directly; mostly you
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will use subclasses which provide specialized type and data handling. The static
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pethod Parameter.create(...) is an easy way to generate instances of these subclasses.
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For more Parameter types, see ParameterTree.parameterTypes module.
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@ -88,7 +92,11 @@ class Parameter(QtCore.QObject):
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Use registerParameterType() to add new class types.
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"""
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cls = PARAM_TYPES[opts['type']]
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typ = opts.get('type', None)
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if typ is None:
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cls = Parameter
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else:
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cls = PARAM_TYPES[opts['type']]
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return cls(**opts)
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def __init__(self, **opts):
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@ -102,6 +110,7 @@ class Parameter(QtCore.QObject):
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'renamable': False,
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'removable': False,
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'strictNaming': False, # forces name to be usable as a python variable
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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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self.opts.update(opts)
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@ -120,9 +129,7 @@ class Parameter(QtCore.QObject):
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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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for chOpts in self.opts.get('children', []):
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#print self, "Add child:", type(chOpts), id(chOpts)
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self.addChild(chOpts)
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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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@ -159,6 +166,22 @@ class Parameter(QtCore.QObject):
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def type(self):
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return self.opts['type']
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def isType(self, typ):
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"""
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Return True if this parameter type matches the name *typ*.
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This can occur either of two ways:
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- If self.type() == *typ*
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- If this parameter's class is registered with the name *typ*
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"""
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if self.type() == typ:
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return True
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global PARAM_TYPES
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cls = PARAM_TYPES.get(typ, None)
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if cls is None:
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raise Exception("Type name '%s' is not registered." % str(typ))
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return self.__class__ is cls
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def childPath(self, child):
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"""
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Return the path of parameter names from self to child.
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@ -175,7 +198,6 @@ class Parameter(QtCore.QObject):
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def setValue(self, value, blockSignal=None):
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## return the actual value that was set
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## (this may be different from the value that was requested)
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#print self, "Set value:", value, self.opts['value'], self.opts['value'] == value
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try:
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if blockSignal is not None:
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self.sigValueChanged.disconnect(blockSignal)
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@ -205,10 +227,13 @@ class Parameter(QtCore.QObject):
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The tree state may be restored from this structure using restoreState()
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"""
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state = self.opts.copy()
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state['children'] = [ch.saveState() for ch in self]
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state['children'] = collections.OrderedDict([(ch.name(), ch.saveState()) for ch in self])
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if state['type'] is None:
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global PARAM_NAMES
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state['type'] = PARAM_NAMES.get(type(self), None)
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return state
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def restoreState(self, state, recursive=True, addChildren=True, removeChildren=True):
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def restoreState(self, state, recursive=True, addChildren=True, removeChildren=True, blockSignals=True):
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"""
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Restore the state of this parameter and its children from a structure generated using saveState()
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If recursive is True, then attempt to restore the state of child parameters as well.
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@ -216,55 +241,70 @@ class Parameter(QtCore.QObject):
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created if they do not already exist.
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If removeChildren is True, then any children which are not referenced in the state object will
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be removed.
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If blockSignals is True, no signals will be emitted until the tree has been completely restored.
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This prevents signal handlers from responding to a partially-rebuilt network.
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"""
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childState = state.get('children', [])
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self.setOpts(**state)
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if not recursive:
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return
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ptr = 0 ## pointer to first child that has not been restored yet
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foundChilds = set()
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#print "==============", self.name()
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for ch in childState:
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name = ch['name']
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typ = ch['type']
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#print('child: %s, %s' % (self.name()+'.'+name, typ))
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## list of children may be stored either as list or dict.
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if isinstance(childState, dict):
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childState = childState.values()
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## First, see if there is already a child with this name and type
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gotChild = False
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for i, ch2 in enumerate(self.childs[ptr:]):
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#print ch2, ch2.name, ch2.type
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if ch2.name() != name or ch2.type() != typ:
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continue
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gotChild = True
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#print " found it"
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if i != 0: ## move parameter to next position
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self.removeChild(ch2)
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if blockSignals:
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self.blockTreeChangeSignal()
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try:
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self.setOpts(**state)
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if not recursive:
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return
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ptr = 0 ## pointer to first child that has not been restored yet
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foundChilds = set()
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#print "==============", self.name()
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for ch in childState:
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name = ch['name']
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typ = ch['type']
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#print('child: %s, %s' % (self.name()+'.'+name, typ))
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## First, see if there is already a child with this name and type
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gotChild = False
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for i, ch2 in enumerate(self.childs[ptr:]):
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#print " ", ch2.name(), ch2.type()
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if ch2.name() != name or not ch2.isType(typ):
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continue
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gotChild = True
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#print " found it"
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if i != 0: ## move parameter to next position
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#self.removeChild(ch2)
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self.insertChild(ptr, ch2)
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#print " moved to position", ptr
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ch2.restoreState(ch, recursive=recursive, addChildren=addChildren, removeChildren=removeChildren)
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foundChilds.add(ch2)
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break
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if not gotChild:
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if not addChildren:
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#print " ignored child"
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continue
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#print " created new"
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ch2 = Parameter.create(**ch)
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self.insertChild(ptr, ch2)
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#print " moved to position", ptr
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ch2.restoreState(ch, recursive=recursive, addChildren=addChildren, removeChildren=removeChildren)
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foundChilds.add(ch2)
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break
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if not gotChild:
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if not addChildren:
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#print " ignored child"
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continue
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#print " created new"
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ch2 = Parameter.create(**ch)
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self.insertChild(ptr, ch2)
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foundChilds.add(ch2)
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ptr += 1
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if removeChildren:
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for ch in self:
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if ch not in foundChilds:
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#print " remove:", ch
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self.removeChild(ch)
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foundChilds.add(ch2)
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ptr += 1
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if removeChildren:
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for ch in self.childs[:]:
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if ch not in foundChilds:
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#print " remove:", ch
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self.removeChild(ch)
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finally:
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if blockSignals:
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self.unblockTreeChangeSignal()
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@ -362,6 +402,22 @@ class Parameter(QtCore.QObject):
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def addChild(self, child):
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"""Add another parameter to the end of this parameter's child list."""
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return self.insertChild(len(self.childs), child)
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def addChildren(self, children):
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## If children was specified as dict, then assume keys are the names.
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if isinstance(children, dict):
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ch2 = []
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for name, opts in children.items():
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if isinstance(opts, dict) and 'name' not in opts:
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opts = opts.copy()
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opts['name'] = name
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ch2.append(opts)
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children = ch2
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for chOpts in children:
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#print self, "Add child:", type(chOpts), id(chOpts)
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self.addChild(chOpts)
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def insertChild(self, pos, child):
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"""
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@ -373,7 +429,7 @@ class Parameter(QtCore.QObject):
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child = Parameter.create(**child)
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name = child.name()
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if name in self.names:
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if name in self.names and child is not self.names[name]:
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if child.opts.get('autoIncrementName', False):
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name = self.incrementName(name)
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child.setName(name)
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@ -382,15 +438,16 @@ class Parameter(QtCore.QObject):
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if isinstance(pos, Parameter):
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pos = self.childs.index(pos)
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if child.parent() is not None:
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child.remove()
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with self.treeChangeBlocker():
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if child.parent() is not None:
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child.remove()
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self.names[name] = child
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self.childs.insert(pos, child)
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self.names[name] = child
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self.childs.insert(pos, child)
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child.parentChanged(self)
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self.sigChildAdded.emit(self, child, pos)
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child.sigTreeStateChanged.connect(self.treeStateChanged)
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child.parentChanged(self)
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self.sigChildAdded.emit(self, child, pos)
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child.sigTreeStateChanged.connect(self.treeStateChanged)
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return child
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def removeChild(self, child):
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@ -398,7 +455,6 @@ class Parameter(QtCore.QObject):
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name = child.name()
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if name not in self.names or self.names[name] is not child:
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raise Exception("Parameter %s is not my child; can't remove." % str(child))
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del self.names[name]
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self.childs.pop(self.childs.index(child))
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child.parentChanged(None)
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@ -414,6 +470,9 @@ class Parameter(QtCore.QObject):
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"""Return a list of this parameter's children."""
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## warning -- this overrides QObject.children
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return self.childs[:]
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def hasChildren(self):
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return len(self.childs) > 0
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def parentChanged(self, parent):
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"""This method is called when the parameter's parent has changed.
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@ -443,7 +502,7 @@ class Parameter(QtCore.QObject):
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num = int(num)
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while True:
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newName = base + ("%%0%dd"%numLen) % num
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if newName not in self.childs:
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if newName not in self.names:
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return newName
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num += 1
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@ -8,17 +8,17 @@ import collections, os, weakref, re
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class ParameterTree(TreeWidget):
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"""Widget used to display or control data from a ParameterSet"""
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def __init__(self, parent=None):
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def __init__(self, parent=None, showHeader=True):
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TreeWidget.__init__(self, parent)
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self.setVerticalScrollMode(self.ScrollPerPixel)
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self.setHorizontalScrollMode(self.ScrollPerPixel)
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self.setAnimated(False)
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self.setColumnCount(2)
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self.setHeaderLabels(["Parameter", "Value"])
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self.setRootIsDecorated(False)
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self.setAlternatingRowColors(True)
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self.paramSet = None
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self.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
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self.setHeaderHidden(not showHeader)
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self.itemChanged.connect(self.itemChangedEvent)
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self.lastSel = None
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self.setRootIsDecorated(False)
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@ -152,7 +152,6 @@ class WidgetParameterItem(ParameterItem):
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def valueChanged(self, param, val, force=False):
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## called when the parameter's value has changed
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ParameterItem.valueChanged(self, param, val)
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self.widget.sigChanged.disconnect(self.widgetValueChanged)
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try:
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if force or val != self.widget.value():
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@ -273,12 +272,21 @@ class SimpleParameter(Parameter):
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def __init__(self, *args, **kargs):
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Parameter.__init__(self, *args, **kargs)
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## override a few methods for color parameters
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if self.opts['type'] == 'color':
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self.value = self.colorValue
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self.saveState = self.saveColorState
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def colorValue(self):
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return pg.mkColor(Parameter.value(self))
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def saveColorState(self):
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state = Parameter.saveState(self)
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state['value'] = pg.colorTuple(self.value())
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return state
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registerParameterType('int', SimpleParameter, override=True)
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registerParameterType('float', SimpleParameter, override=True)
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registerParameterType('bool', SimpleParameter, override=True)
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@ -303,9 +311,8 @@ class GroupParameterItem(ParameterItem):
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addText = param.opts['addText']
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if 'addList' in param.opts:
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self.addWidget = QtGui.QComboBox()
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self.addWidget.addItem(addText)
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for t in param.opts['addList']:
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self.addWidget.addItem(t)
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self.addWidget.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
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self.updateAddList()
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self.addWidget.currentIndexChanged.connect(self.addChanged)
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else:
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self.addWidget = QtGui.QPushButton(addText)
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@ -315,7 +322,8 @@ class GroupParameterItem(ParameterItem):
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l.setContentsMargins(0,0,0,0)
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w.setLayout(l)
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l.addWidget(self.addWidget)
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l.addItem(QtGui.QSpacerItem(200, 10, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum))
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l.addStretch()
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#l.addItem(QtGui.QSpacerItem(200, 10, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum))
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self.addWidgetBox = w
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self.addItem = QtGui.QTreeWidgetItem([])
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self.addItem.setFlags(QtCore.Qt.ItemIsEnabled)
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@ -370,17 +378,46 @@ class GroupParameterItem(ParameterItem):
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ParameterItem.insertChild(self, self.childCount()-1, child)
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else:
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ParameterItem.addChild(self, child)
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def optsChanged(self, param, changed):
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if 'addList' in changed:
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self.updateAddList()
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def updateAddList(self):
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self.addWidget.blockSignals(True)
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try:
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self.addWidget.clear()
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self.addWidget.addItem(self.param.opts['addText'])
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for t in self.param.opts['addList']:
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self.addWidget.addItem(t)
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finally:
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self.addWidget.blockSignals(False)
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class GroupParameter(Parameter):
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"""
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Group parameters are used mainly as a generic parent item that holds (and groups!) a set
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of child parameters. It also provides a simple mechanism for displaying a button or combo
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that can be used to add new parameters to the group.
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of child parameters.
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It also provides a simple mechanism for displaying a button or combo
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that can be used to add new parameters to the group. To enable this, the group
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must be initialized with the 'addText' option (the text will be displayed on
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a button which, when clicked, will cause addNew() to be called). If the 'addList'
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option is specified as well, then a dropdown-list of addable items will be displayed
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instead of a button.
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"""
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itemClass = GroupParameterItem
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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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"""
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raise Exception("Must override this function in subclass.")
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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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self.setOpts(addList=vals)
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registerParameterType('group', GroupParameter, override=True)
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@ -394,8 +431,10 @@ class ListParameterItem(WidgetParameterItem):
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"""
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def __init__(self, param, depth):
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self.targetValue = None
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WidgetParameterItem.__init__(self, param, depth)
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def makeWidget(self):
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opts = self.param.opts
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t = opts['type']
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@ -418,7 +457,8 @@ class ListParameterItem(WidgetParameterItem):
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#else:
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#return key
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#print key, self.forward
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return self.forward[key]
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return self.forward.get(key, None)
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def setValue(self, val):
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#vals = self.param.opts['limits']
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@ -431,6 +471,7 @@ class ListParameterItem(WidgetParameterItem):
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#raise Exception("Value '%s' not allowed." % val)
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#else:
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#key = unicode(val)
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self.targetValue = val
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if val not in self.reverse:
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self.widget.setCurrentIndex(0)
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else:
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@ -440,27 +481,23 @@ class ListParameterItem(WidgetParameterItem):
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|
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def limitsChanged(self, param, limits):
|
||||
# set up forward / reverse mappings for name:value
|
||||
self.forward = collections.OrderedDict() ## name: value
|
||||
self.reverse = collections.OrderedDict() ## value: name
|
||||
if isinstance(limits, dict):
|
||||
for k, v in limits.items():
|
||||
self.forward[k] = v
|
||||
self.reverse[v] = k
|
||||
else:
|
||||
for v in limits:
|
||||
n = asUnicode(v)
|
||||
self.forward[n] = v
|
||||
self.reverse[v] = n
|
||||
#self.forward = collections.OrderedDict([('', None)]) ## name: value
|
||||
#self.reverse = collections.OrderedDict([(None, '')]) ## value: name
|
||||
|
||||
if len(limits) == 0:
|
||||
limits = [''] ## Can never have an empty list--there is always at least a singhe blank item.
|
||||
|
||||
self.forward, self.reverse = ListParameter.mapping(limits)
|
||||
try:
|
||||
self.widget.blockSignals(True)
|
||||
val = asUnicode(self.widget.currentText())
|
||||
val = self.targetValue #asUnicode(self.widget.currentText())
|
||||
|
||||
self.widget.clear()
|
||||
for k in self.forward:
|
||||
self.widget.addItem(k)
|
||||
if k == val:
|
||||
self.widget.setCurrentIndex(self.widget.count()-1)
|
||||
|
||||
self.updateDisplayLabel()
|
||||
finally:
|
||||
self.widget.blockSignals(False)
|
||||
|
||||
@ -472,29 +509,107 @@ class ListParameter(Parameter):
|
||||
def __init__(self, **opts):
|
||||
self.forward = collections.OrderedDict() ## name: value
|
||||
self.reverse = collections.OrderedDict() ## value: name
|
||||
|
||||
## Parameter uses 'limits' option to define the set of allowed values
|
||||
if 'values' in opts:
|
||||
opts['limits'] = opts['values']
|
||||
if opts.get('limits', None) is None:
|
||||
opts['limits'] = []
|
||||
Parameter.__init__(self, **opts)
|
||||
|
||||
def setLimits(self, limits):
|
||||
self.forward = collections.OrderedDict() ## name: value
|
||||
self.reverse = collections.OrderedDict() ## value: name
|
||||
if isinstance(limits, dict):
|
||||
for k, v in limits.items():
|
||||
self.forward[k] = v
|
||||
self.reverse[v] = k
|
||||
else:
|
||||
for v in limits:
|
||||
n = asUnicode(v)
|
||||
self.forward[n] = v
|
||||
self.reverse[v] = n
|
||||
self.forward, self.reverse = self.mapping(limits)
|
||||
|
||||
Parameter.setLimits(self, limits)
|
||||
#print self.name(), self.value(), limits
|
||||
if self.value() not in self.reverse and len(self.reverse) > 0:
|
||||
self.setValue(list(self.reverse.keys())[0])
|
||||
|
||||
@staticmethod
|
||||
def mapping(limits):
|
||||
## Return forward and reverse mapping dictionaries given a limit specification
|
||||
forward = collections.OrderedDict() ## name: value
|
||||
reverse = collections.OrderedDict() ## value: name
|
||||
if isinstance(limits, dict):
|
||||
for k, v in limits.items():
|
||||
forward[k] = v
|
||||
reverse[v] = k
|
||||
else:
|
||||
for v in limits:
|
||||
n = asUnicode(v)
|
||||
forward[n] = v
|
||||
reverse[v] = n
|
||||
return forward, reverse
|
||||
|
||||
registerParameterType('list', ListParameter, override=True)
|
||||
|
||||
|
||||
|
||||
class ActionParameterItem(ParameterItem):
|
||||
def __init__(self, param, depth):
|
||||
ParameterItem.__init__(self, param, depth)
|
||||
self.layoutWidget = QtGui.QWidget()
|
||||
self.layout = QtGui.QHBoxLayout()
|
||||
self.layoutWidget.setLayout(self.layout)
|
||||
self.button = QtGui.QPushButton(param.name())
|
||||
#self.layout.addSpacing(100)
|
||||
self.layout.addWidget(self.button)
|
||||
self.layout.addStretch()
|
||||
self.button.clicked.connect(self.buttonClicked)
|
||||
param.sigNameChanged.connect(self.paramRenamed)
|
||||
self.setText(0, '')
|
||||
|
||||
def treeWidgetChanged(self):
|
||||
ParameterItem.treeWidgetChanged(self)
|
||||
tree = self.treeWidget()
|
||||
if tree is None:
|
||||
return
|
||||
|
||||
tree.setFirstItemColumnSpanned(self, True)
|
||||
tree.setItemWidget(self, 0, self.layoutWidget)
|
||||
|
||||
def paramRenamed(self, param, name):
|
||||
self.button.setText(name)
|
||||
|
||||
def buttonClicked(self):
|
||||
self.param.activate()
|
||||
|
||||
class ActionParameter(Parameter):
|
||||
"""Used for displaying a button within the tree."""
|
||||
itemClass = ActionParameterItem
|
||||
sigActivated = QtCore.Signal(object)
|
||||
|
||||
def activate(self):
|
||||
self.sigActivated.emit(self)
|
||||
self.emitStateChanged('activated', None)
|
||||
|
||||
registerParameterType('action', ActionParameter, override=True)
|
||||
|
||||
|
||||
|
||||
class TextParameterItem(WidgetParameterItem):
|
||||
def __init__(self, param, depth):
|
||||
WidgetParameterItem.__init__(self, param, depth)
|
||||
self.subItem = QtGui.QTreeWidgetItem()
|
||||
self.addChild(self.subItem)
|
||||
|
||||
def treeWidgetChanged(self):
|
||||
self.treeWidget().setFirstItemColumnSpanned(self.subItem, True)
|
||||
self.treeWidget().setItemWidget(self.subItem, 0, self.textBox)
|
||||
self.setExpanded(True)
|
||||
|
||||
def makeWidget(self):
|
||||
self.textBox = QtGui.QTextEdit()
|
||||
self.textBox.setMaximumHeight(100)
|
||||
self.textBox.value = lambda: str(self.textBox.toPlainText())
|
||||
self.textBox.setValue = self.textBox.setPlainText
|
||||
self.textBox.sigChanged = self.textBox.textChanged
|
||||
return self.textBox
|
||||
|
||||
class TextParameter(Parameter):
|
||||
"""Editable string; displayed as large text box in the tree."""
|
||||
itemClass = TextParameterItem
|
||||
|
||||
|
||||
|
||||
registerParameterType('text', TextParameter, override=True)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user