602 lines
22 KiB
Python
602 lines
22 KiB
Python
# -*- coding: utf-8 -*-
|
|
from pyqtgraph.Qt import QtCore, QtGui
|
|
import weakref
|
|
from pyqtgraph.graphicsItems.GraphicsObject import GraphicsObject
|
|
import pyqtgraph.functions as fn
|
|
from pyqtgraph.Point import Point
|
|
#from PySide import QtCore, QtGui
|
|
from .eq import *
|
|
|
|
class Terminal(object):
|
|
def __init__(self, node, name, io, optional=False, multi=False, pos=None, renamable=False, removable=False, multiable=False, bypass=None):
|
|
"""
|
|
Construct a new terminal.
|
|
|
|
============== =================================================================================
|
|
**Arguments:**
|
|
node the node to which this terminal belongs
|
|
name string, the name of the terminal
|
|
io 'in' or 'out'
|
|
optional bool, whether the node may process without connection to this terminal
|
|
multi bool, for inputs: whether this terminal may make multiple connections
|
|
for outputs: whether this terminal creates a different value for each connection
|
|
pos [x, y], the position of the terminal within its node's boundaries
|
|
renamable (bool) Whether the terminal can be renamed by the user
|
|
removable (bool) Whether the terminal can be removed by the user
|
|
multiable (bool) Whether the user may toggle the *multi* option for this terminal
|
|
bypass (str) Name of the terminal from which this terminal's value is derived
|
|
when the Node is in bypass mode.
|
|
============== =================================================================================
|
|
"""
|
|
self._io = io
|
|
#self._isOutput = opts[0] in ['out', 'io']
|
|
#self._isInput = opts[0]] in ['in', 'io']
|
|
#self._isIO = opts[0]=='io'
|
|
self._optional = optional
|
|
self._multi = multi
|
|
self._node = weakref.ref(node)
|
|
self._name = name
|
|
self._renamable = renamable
|
|
self._removable = removable
|
|
self._multiable = multiable
|
|
self._connections = {}
|
|
self._graphicsItem = TerminalGraphicsItem(self, parent=self._node().graphicsItem())
|
|
self._bypass = bypass
|
|
|
|
if multi:
|
|
self._value = {} ## dictionary of terminal:value pairs.
|
|
else:
|
|
self._value = None
|
|
|
|
self.valueOk = None
|
|
self.recolor()
|
|
|
|
def value(self, term=None):
|
|
"""Return the value this terminal provides for the connected terminal"""
|
|
if term is None:
|
|
return self._value
|
|
|
|
if self.isMultiValue():
|
|
return self._value.get(term, None)
|
|
else:
|
|
return self._value
|
|
|
|
def bypassValue(self):
|
|
return self._bypass
|
|
|
|
def setValue(self, val, process=True):
|
|
"""If this is a single-value terminal, val should be a single value.
|
|
If this is a multi-value terminal, val should be a dict of terminal:value pairs"""
|
|
if not self.isMultiValue():
|
|
if eq(val, self._value):
|
|
return
|
|
self._value = val
|
|
else:
|
|
if not isinstance(self._value, dict):
|
|
self._value = {}
|
|
if val is not None:
|
|
self._value.update(val)
|
|
|
|
self.setValueAcceptable(None) ## by default, input values are 'unchecked' until Node.update().
|
|
if self.isInput() and process:
|
|
self.node().update()
|
|
|
|
## Let the flowchart handle this.
|
|
#if self.isOutput():
|
|
#for c in self.connections():
|
|
#if c.isInput():
|
|
#c.inputChanged(self)
|
|
self.recolor()
|
|
|
|
def setOpts(self, **opts):
|
|
self._renamable = opts.get('renamable', self._renamable)
|
|
self._removable = opts.get('removable', self._removable)
|
|
self._multiable = opts.get('multiable', self._multiable)
|
|
if 'multi' in opts:
|
|
self.setMultiValue(opts['multi'])
|
|
|
|
|
|
def connected(self, term):
|
|
"""Called whenever this terminal has been connected to another. (note--this function is called on both terminals)"""
|
|
if self.isInput() and term.isOutput():
|
|
self.inputChanged(term)
|
|
if self.isOutput() and self.isMultiValue():
|
|
self.node().update()
|
|
self.node().connected(self, term)
|
|
|
|
def disconnected(self, term):
|
|
"""Called whenever this terminal has been disconnected from another. (note--this function is called on both terminals)"""
|
|
if self.isMultiValue() and term in self._value:
|
|
del self._value[term]
|
|
self.node().update()
|
|
#self.recolor()
|
|
else:
|
|
if self.isInput():
|
|
self.setValue(None)
|
|
self.node().disconnected(self, term)
|
|
#self.node().update()
|
|
|
|
def inputChanged(self, term, process=True):
|
|
"""Called whenever there is a change to the input value to this terminal.
|
|
It may often be useful to override this function."""
|
|
if self.isMultiValue():
|
|
self.setValue({term: term.value(self)}, process=process)
|
|
else:
|
|
self.setValue(term.value(self), process=process)
|
|
|
|
def valueIsAcceptable(self):
|
|
"""Returns True->acceptable None->unknown False->Unacceptable"""
|
|
return self.valueOk
|
|
|
|
def setValueAcceptable(self, v=True):
|
|
self.valueOk = v
|
|
self.recolor()
|
|
|
|
def connections(self):
|
|
return self._connections
|
|
|
|
def node(self):
|
|
return self._node()
|
|
|
|
def isInput(self):
|
|
return self._io == 'in'
|
|
|
|
def isMultiValue(self):
|
|
return self._multi
|
|
|
|
def setMultiValue(self, multi):
|
|
"""Set whether this is a multi-value terminal."""
|
|
self._multi = multi
|
|
if not multi and len(self.inputTerminals()) > 1:
|
|
self.disconnectAll()
|
|
|
|
for term in self.inputTerminals():
|
|
self.inputChanged(term)
|
|
|
|
def isOutput(self):
|
|
return self._io == 'out'
|
|
|
|
def isRenamable(self):
|
|
return self._renamable
|
|
|
|
def isRemovable(self):
|
|
return self._removable
|
|
|
|
def isMultiable(self):
|
|
return self._multiable
|
|
|
|
def name(self):
|
|
return self._name
|
|
|
|
def graphicsItem(self):
|
|
return self._graphicsItem
|
|
|
|
def isConnected(self):
|
|
return len(self.connections()) > 0
|
|
|
|
def connectedTo(self, term):
|
|
return term in self.connections()
|
|
|
|
def hasInput(self):
|
|
#conn = self.extendedConnections()
|
|
for t in self.connections():
|
|
if t.isOutput():
|
|
return True
|
|
return False
|
|
|
|
def inputTerminals(self):
|
|
"""Return the terminal(s) that give input to this one."""
|
|
#terms = self.extendedConnections()
|
|
#for t in terms:
|
|
#if t.isOutput():
|
|
#return t
|
|
return [t for t in self.connections() if t.isOutput()]
|
|
|
|
|
|
def dependentNodes(self):
|
|
"""Return the list of nodes which receive input from this terminal."""
|
|
#conn = self.extendedConnections()
|
|
#del conn[self]
|
|
return set([t.node() for t in self.connections() if t.isInput()])
|
|
|
|
def connectTo(self, term, connectionItem=None):
|
|
try:
|
|
if self.connectedTo(term):
|
|
raise Exception('Already connected')
|
|
if term is self:
|
|
raise Exception('Not connecting terminal to self')
|
|
if term.node() is self.node():
|
|
raise Exception("Can't connect to terminal on same node.")
|
|
for t in [self, term]:
|
|
if t.isInput() and not t._multi and len(t.connections()) > 0:
|
|
raise Exception("Cannot connect %s <-> %s: Terminal %s is already connected to %s (and does not allow multiple connections)" % (self, term, t, list(t.connections().keys())))
|
|
#if self.hasInput() and term.hasInput():
|
|
#raise Exception('Target terminal already has input')
|
|
|
|
#if term in self.node().terminals.values():
|
|
#if self.isOutput() or term.isOutput():
|
|
#raise Exception('Can not connect an output back to the same node.')
|
|
except:
|
|
if connectionItem is not None:
|
|
connectionItem.close()
|
|
raise
|
|
|
|
if connectionItem is None:
|
|
connectionItem = ConnectionItem(self.graphicsItem(), term.graphicsItem())
|
|
#self.graphicsItem().scene().addItem(connectionItem)
|
|
self.graphicsItem().getViewBox().addItem(connectionItem)
|
|
#connectionItem.setParentItem(self.graphicsItem().parent().parent())
|
|
self._connections[term] = connectionItem
|
|
term._connections[self] = connectionItem
|
|
|
|
self.recolor()
|
|
|
|
#if self.isOutput() and term.isInput():
|
|
#term.inputChanged(self)
|
|
#if term.isInput() and term.isOutput():
|
|
#self.inputChanged(term)
|
|
self.connected(term)
|
|
term.connected(self)
|
|
|
|
return connectionItem
|
|
|
|
def disconnectFrom(self, term):
|
|
if not self.connectedTo(term):
|
|
return
|
|
item = self._connections[term]
|
|
#print "removing connection", item
|
|
#item.scene().removeItem(item)
|
|
item.close()
|
|
del self._connections[term]
|
|
del term._connections[self]
|
|
self.recolor()
|
|
term.recolor()
|
|
|
|
self.disconnected(term)
|
|
term.disconnected(self)
|
|
#if self.isOutput() and term.isInput():
|
|
#term.inputChanged(self)
|
|
#if term.isInput() and term.isOutput():
|
|
#self.inputChanged(term)
|
|
|
|
|
|
def disconnectAll(self):
|
|
for t in list(self._connections.keys()):
|
|
self.disconnectFrom(t)
|
|
|
|
def recolor(self, color=None, recurse=True):
|
|
if color is None:
|
|
if not self.isConnected(): ## disconnected terminals are black
|
|
color = QtGui.QColor(0,0,0)
|
|
elif self.isInput() and not self.hasInput(): ## input terminal with no connected output terminals
|
|
color = QtGui.QColor(200,200,0)
|
|
elif self._value is None or eq(self._value, {}): ## terminal is connected but has no data (possibly due to processing error)
|
|
color = QtGui.QColor(255,255,255)
|
|
elif self.valueIsAcceptable() is None: ## terminal has data, but it is unknown if the data is ok
|
|
color = QtGui.QColor(200, 200, 0)
|
|
elif self.valueIsAcceptable() is True: ## terminal has good input, all ok
|
|
color = QtGui.QColor(0, 200, 0)
|
|
else: ## terminal has bad input
|
|
color = QtGui.QColor(200, 0, 0)
|
|
self.graphicsItem().setBrush(QtGui.QBrush(color))
|
|
|
|
if recurse:
|
|
for t in self.connections():
|
|
t.recolor(color, recurse=False)
|
|
|
|
|
|
def rename(self, name):
|
|
oldName = self._name
|
|
self._name = name
|
|
self.node().terminalRenamed(self, oldName)
|
|
self.graphicsItem().termRenamed(name)
|
|
|
|
def __repr__(self):
|
|
return "<Terminal %s.%s>" % (str(self.node().name()), str(self.name()))
|
|
|
|
#def extendedConnections(self, terms=None):
|
|
#"""Return list of terminals (including this one) that are directly or indirectly wired to this."""
|
|
#if terms is None:
|
|
#terms = {}
|
|
#terms[self] = None
|
|
#for t in self._connections:
|
|
#if t in terms:
|
|
#continue
|
|
#terms.update(t.extendedConnections(terms))
|
|
#return terms
|
|
|
|
def __hash__(self):
|
|
return id(self)
|
|
|
|
def close(self):
|
|
self.disconnectAll()
|
|
item = self.graphicsItem()
|
|
if item.scene() is not None:
|
|
item.scene().removeItem(item)
|
|
|
|
def saveState(self):
|
|
return {'io': self._io, 'multi': self._multi, 'optional': self._optional, 'renamable': self._renamable, 'removable': self._removable, 'multiable': self._multiable}
|
|
|
|
|
|
#class TerminalGraphicsItem(QtGui.QGraphicsItem):
|
|
class TerminalGraphicsItem(GraphicsObject):
|
|
|
|
def __init__(self, term, parent=None):
|
|
self.term = term
|
|
#QtGui.QGraphicsItem.__init__(self, parent)
|
|
GraphicsObject.__init__(self, parent)
|
|
self.brush = fn.mkBrush(0,0,0)
|
|
self.box = QtGui.QGraphicsRectItem(0, 0, 10, 10, self)
|
|
self.label = QtGui.QGraphicsTextItem(self.term.name(), self)
|
|
self.label.scale(0.7, 0.7)
|
|
#self.setAcceptHoverEvents(True)
|
|
self.newConnection = None
|
|
self.setFiltersChildEvents(True) ## to pick up mouse events on the rectitem
|
|
if self.term.isRenamable():
|
|
self.label.setTextInteractionFlags(QtCore.Qt.TextEditorInteraction)
|
|
self.label.focusOutEvent = self.labelFocusOut
|
|
self.label.keyPressEvent = self.labelKeyPress
|
|
self.setZValue(1)
|
|
self.menu = None
|
|
|
|
|
|
def labelFocusOut(self, ev):
|
|
QtGui.QGraphicsTextItem.focusOutEvent(self.label, ev)
|
|
self.labelChanged()
|
|
|
|
def labelKeyPress(self, ev):
|
|
if ev.key() == QtCore.Qt.Key_Enter or ev.key() == QtCore.Qt.Key_Return:
|
|
self.labelChanged()
|
|
else:
|
|
QtGui.QGraphicsTextItem.keyPressEvent(self.label, ev)
|
|
|
|
def labelChanged(self):
|
|
newName = str(self.label.toPlainText())
|
|
if newName != self.term.name():
|
|
self.term.rename(newName)
|
|
|
|
def termRenamed(self, name):
|
|
self.label.setPlainText(name)
|
|
|
|
def setBrush(self, brush):
|
|
self.brush = brush
|
|
self.box.setBrush(brush)
|
|
|
|
def disconnect(self, target):
|
|
self.term.disconnectFrom(target.term)
|
|
|
|
def boundingRect(self):
|
|
br = self.box.mapRectToParent(self.box.boundingRect())
|
|
lr = self.label.mapRectToParent(self.label.boundingRect())
|
|
return br | lr
|
|
|
|
def paint(self, p, *args):
|
|
pass
|
|
|
|
def setAnchor(self, x, y):
|
|
pos = QtCore.QPointF(x, y)
|
|
self.anchorPos = pos
|
|
br = self.box.mapRectToParent(self.box.boundingRect())
|
|
lr = self.label.mapRectToParent(self.label.boundingRect())
|
|
|
|
|
|
if self.term.isInput():
|
|
self.box.setPos(pos.x(), pos.y()-br.height()/2.)
|
|
self.label.setPos(pos.x() + br.width(), pos.y() - lr.height()/2.)
|
|
else:
|
|
self.box.setPos(pos.x()-br.width(), pos.y()-br.height()/2.)
|
|
self.label.setPos(pos.x()-br.width()-lr.width(), pos.y()-lr.height()/2.)
|
|
self.updateConnections()
|
|
|
|
def updateConnections(self):
|
|
for t, c in self.term.connections().items():
|
|
c.updateLine()
|
|
|
|
def mousePressEvent(self, ev):
|
|
#ev.accept()
|
|
ev.ignore() ## necessary to allow click/drag events to process correctly
|
|
|
|
def mouseClickEvent(self, ev):
|
|
if ev.button() == QtCore.Qt.LeftButton:
|
|
ev.accept()
|
|
self.label.setFocus(QtCore.Qt.MouseFocusReason)
|
|
elif ev.button() == QtCore.Qt.RightButton:
|
|
ev.accept()
|
|
self.raiseContextMenu(ev)
|
|
|
|
def raiseContextMenu(self, ev):
|
|
## only raise menu if this terminal is removable
|
|
menu = self.getMenu()
|
|
menu = self.scene().addParentContextMenus(self, menu, ev)
|
|
pos = ev.screenPos()
|
|
menu.popup(QtCore.QPoint(pos.x(), pos.y()))
|
|
|
|
def getMenu(self):
|
|
if self.menu is None:
|
|
self.menu = QtGui.QMenu()
|
|
self.menu.setTitle("Terminal")
|
|
remAct = QtGui.QAction("Remove terminal", self.menu)
|
|
remAct.triggered.connect(self.removeSelf)
|
|
self.menu.addAction(remAct)
|
|
self.menu.remAct = remAct
|
|
if not self.term.isRemovable():
|
|
remAct.setEnabled(False)
|
|
multiAct = QtGui.QAction("Multi-value", self.menu)
|
|
multiAct.setCheckable(True)
|
|
multiAct.setChecked(self.term.isMultiValue())
|
|
multiAct.setEnabled(self.term.isMultiable())
|
|
|
|
multiAct.triggered.connect(self.toggleMulti)
|
|
self.menu.addAction(multiAct)
|
|
self.menu.multiAct = multiAct
|
|
if self.term.isMultiable():
|
|
multiAct.setEnabled = False
|
|
return self.menu
|
|
|
|
def toggleMulti(self):
|
|
multi = self.menu.multiAct.isChecked()
|
|
self.term.setMultiValue(multi)
|
|
|
|
## probably never need this
|
|
#def getContextMenus(self, ev):
|
|
#return [self.getMenu()]
|
|
|
|
def removeSelf(self):
|
|
self.term.node().removeTerminal(self.term)
|
|
|
|
def mouseDragEvent(self, ev):
|
|
if ev.button() != QtCore.Qt.LeftButton:
|
|
ev.ignore()
|
|
return
|
|
|
|
ev.accept()
|
|
if ev.isStart():
|
|
if self.newConnection is None:
|
|
self.newConnection = ConnectionItem(self)
|
|
#self.scene().addItem(self.newConnection)
|
|
self.getViewBox().addItem(self.newConnection)
|
|
#self.newConnection.setParentItem(self.parent().parent())
|
|
|
|
self.newConnection.setTarget(self.mapToView(ev.pos()))
|
|
elif ev.isFinish():
|
|
if self.newConnection is not None:
|
|
items = self.scene().items(ev.scenePos())
|
|
gotTarget = False
|
|
for i in items:
|
|
if isinstance(i, TerminalGraphicsItem):
|
|
self.newConnection.setTarget(i)
|
|
try:
|
|
self.term.connectTo(i.term, self.newConnection)
|
|
gotTarget = True
|
|
except:
|
|
self.scene().removeItem(self.newConnection)
|
|
self.newConnection = None
|
|
raise
|
|
break
|
|
|
|
if not gotTarget:
|
|
#print "remove unused connection"
|
|
#self.scene().removeItem(self.newConnection)
|
|
self.newConnection.close()
|
|
self.newConnection = None
|
|
else:
|
|
if self.newConnection is not None:
|
|
self.newConnection.setTarget(self.mapToView(ev.pos()))
|
|
|
|
def hoverEvent(self, ev):
|
|
if not ev.isExit() and ev.acceptDrags(QtCore.Qt.LeftButton):
|
|
ev.acceptClicks(QtCore.Qt.LeftButton) ## we don't use the click, but we also don't want anyone else to use it.
|
|
ev.acceptClicks(QtCore.Qt.RightButton)
|
|
self.box.setBrush(fn.mkBrush('w'))
|
|
else:
|
|
self.box.setBrush(self.brush)
|
|
self.update()
|
|
|
|
#def hoverEnterEvent(self, ev):
|
|
#self.hover = True
|
|
|
|
#def hoverLeaveEvent(self, ev):
|
|
#self.hover = False
|
|
|
|
def connectPoint(self):
|
|
## return the connect position of this terminal in view coords
|
|
return self.mapToView(self.mapFromItem(self.box, self.box.boundingRect().center()))
|
|
|
|
def nodeMoved(self):
|
|
for t, item in self.term.connections().items():
|
|
item.updateLine()
|
|
|
|
|
|
#class ConnectionItem(QtGui.QGraphicsItem):
|
|
class ConnectionItem(GraphicsObject):
|
|
|
|
def __init__(self, source, target=None):
|
|
#QtGui.QGraphicsItem.__init__(self)
|
|
GraphicsObject.__init__(self)
|
|
self.setFlags(
|
|
self.ItemIsSelectable |
|
|
self.ItemIsFocusable
|
|
)
|
|
self.source = source
|
|
self.target = target
|
|
self.length = 0
|
|
self.hovered = False
|
|
#self.line = QtGui.QGraphicsLineItem(self)
|
|
self.source.getViewBox().addItem(self)
|
|
self.updateLine()
|
|
self.setZValue(0)
|
|
|
|
def close(self):
|
|
if self.scene() is not None:
|
|
#self.scene().removeItem(self.line)
|
|
self.scene().removeItem(self)
|
|
|
|
def setTarget(self, target):
|
|
self.target = target
|
|
self.updateLine()
|
|
|
|
def updateLine(self):
|
|
start = Point(self.source.connectPoint())
|
|
if isinstance(self.target, TerminalGraphicsItem):
|
|
stop = Point(self.target.connectPoint())
|
|
elif isinstance(self.target, QtCore.QPointF):
|
|
stop = Point(self.target)
|
|
else:
|
|
return
|
|
self.prepareGeometryChange()
|
|
self.resetTransform()
|
|
ang = (stop-start).angle(Point(0, 1))
|
|
if ang is None:
|
|
ang = 0
|
|
self.rotate(ang)
|
|
self.setPos(start)
|
|
self.length = (start-stop).length()
|
|
self.update()
|
|
#self.line.setLine(start.x(), start.y(), stop.x(), stop.y())
|
|
|
|
def keyPressEvent(self, ev):
|
|
if ev.key() == QtCore.Qt.Key_Delete or ev.key() == QtCore.Qt.Key_Backspace:
|
|
#if isinstance(self.target, TerminalGraphicsItem):
|
|
self.source.disconnect(self.target)
|
|
ev.accept()
|
|
else:
|
|
ev.ignore()
|
|
|
|
def mousePressEvent(self, ev):
|
|
ev.ignore()
|
|
|
|
def mouseClickEvent(self, ev):
|
|
if ev.button() == QtCore.Qt.LeftButton:
|
|
ev.accept()
|
|
sel = self.isSelected()
|
|
self.setSelected(True)
|
|
if not sel and self.isSelected():
|
|
self.update()
|
|
|
|
def hoverEvent(self, ev):
|
|
if (not ev.isExit()) and ev.acceptClicks(QtCore.Qt.LeftButton):
|
|
self.hovered = True
|
|
else:
|
|
self.hovered = False
|
|
self.update()
|
|
|
|
|
|
def boundingRect(self):
|
|
#return self.line.boundingRect()
|
|
px = self.pixelWidth()
|
|
return QtCore.QRectF(-5*px, 0, 10*px, self.length)
|
|
|
|
#def shape(self):
|
|
#return self.line.shape()
|
|
|
|
def paint(self, p, *args):
|
|
if self.isSelected():
|
|
p.setPen(fn.mkPen(200, 200, 0, width=3))
|
|
else:
|
|
if self.hovered:
|
|
p.setPen(fn.mkPen(150, 150, 250, width=1))
|
|
else:
|
|
p.setPen(fn.mkPen(100, 100, 250, width=1))
|
|
|
|
p.drawLine(0, 0, 0, self.length)
|