def mouseMoveEvent(self, event):
""" If minimum distance from mousePressEvent is reached initiates dragging.
"""
#logging.debug(self.__class__.__name__ +": mouseMoveEvent()")
if self._dragablePort and self._startDragPosition and bool(
event.buttons() & Qt.LeftButton):
if not self._aimConnection and (
event.pos() - self._startDragPosition
).manhattanLength() >= QApplication.startDragDistance():
self._aimConnection = PointToPointConnection(
self.moduleParent(), self.connectionPoint(),
self.mapTo(self.moduleParent(), event.pos()))
self._aimConnection.setSourceDirection(
self.CONNECTION_DIRECTION)
self.connect(self._aimConnection, SIGNAL("connectionDeleted"),
self.resetAimConnection)
if self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.RIGHT:
self._aimConnection.setTargetDirection(
PointToPointConnection.ConnectionDirection.LEFT)
elif self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.LEFT:
self._aimConnection.setTargetDirection(
PointToPointConnection.ConnectionDirection.RIGHT)
self._aimConnection.show()
elif self._aimConnection:
self._aimConnection.updateTargetPoint(
self.mapTo(self.moduleParent(), event.pos()))
VispaWidget.mouseMoveEvent(self, event)
def mouseMoveEvent(self, event):
""" If minimum distance from mousePressEvent is reached initiates dragging.
"""
#logging.debug(self.__class__.__name__ +": mouseMoveEvent()")
if self._dragablePort and self._startDragPosition and bool(event.buttons() & Qt.LeftButton):
if not self._aimConnection and (event.pos() - self._startDragPosition).manhattanLength() >= QApplication.startDragDistance():
self._aimConnection = PointToPointConnection(self.moduleParent(), self.connectionPoint(), self.mapTo(self.moduleParent(), event.pos()))
self._aimConnection.setSourceDirection(self.CONNECTION_DIRECTION)
self.connect(self._aimConnection, SIGNAL("connectionDeleted"), self.resetAimConnection)
if self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.RIGHT:
self._aimConnection.setTargetDirection(PointToPointConnection.ConnectionDirection.LEFT)
elif self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.LEFT:
self._aimConnection.setTargetDirection(PointToPointConnection.ConnectionDirection.RIGHT)
self._aimConnection.show()
elif self._aimConnection:
self._aimConnection.updateTargetPoint(self.mapTo(self.moduleParent(), event.pos()))
VispaWidget.mouseMoveEvent(self, event)
class PortWidget(VispaWidget):
""" This widget is used to dispay sink and source port of ConnectableWidget.
"""
# Overridden attibutes
WIDTH = 6
HEIGHT = WIDTH
BACKGROUND_SHAPE = 'CIRCLE'
TITLEFIELD_FONTSIZE = 10
SELECTABLE_FLAG = False
# New attributes
PORT_TYPE = ''
CONNECTIONPOINT_X = 3
CONNECTIONPOINT_Y = 3
CONNECTION_DIRECTION = PointToPointConnection.ConnectionDirection.UNDEFINED # Default
DRAG_PORT_TEXT = 'connect port' # Text shown while dragging. The drop event is verified by this string, so should not be empty.
def __init__(self, parent=None, name='default'):
""" Constructor.
"""
VispaWidget.__init__(self, parent)
self.setName(name)
self._connectionDirection = self.CONNECTION_DIRECTION
self._startDragPosition = None
self.setDragable(True)
self._aimConnection = None
self._attachedConnections = []
def attachConnection(self, connection):
self._attachedConnections.append(connection)
def detachConnection(self, connection):
if connection in self._attachedConnections:
self._attachedConnections.remove(connection)
else:
logging.error(
"%s: detachConnection(): Tried to detach a connection that was not attached ot this port. Aborting..."
% self.__class__.__name__)
def updateAttachedConnections(self):
for connection in self._attachedConnections:
connection.updateConnection()
def deleteAttachedConnections(self):
for connection in self._attachedConnections:
connection.delete()
def attachedConnections(self):
return self._attachedConnections
def setDragable(self, dragable, recursive=False):
""" Set whether user can grab the port and connect it to others.
"""
VispaWidget.setDragable(self, False, recursive)
self._dragablePort = dragable
self.setAcceptDrops(dragable)
def isDragable(self):
return self._dragablePort
def setName(self, name):
""" Sets name of port.
Name will be shown as tooltip unless a descriptions is set.
See setDescription().
"""
#self._initTitleField()
#self.titleField().setAutoscale(True, False)
self.setTitle(name)
self.setToolTip(name)
def name(self):
""" Returns name of this port.
"""
if self.titleIsSet():
return self.title()
return ''
def setDescription(self, description):
""" Sets description text of this port.
Description will be shown as tooltip.
"""
self.setText(description)
def description(self):
""" Returns description text.
"""
if self.textFieldIsSet():
return self.textField.getText()
return ''
def portType(self):
""" Return type of this port.
The value has to be set by inheriting classes.
"""
return self.PORT_TYPE
def connectionPoint(self, frame="workspace"):
""" Returns point within this port from which attached connections should start.
Possible values for the optional frame argument are 'workspace' (default or invalid value), 'widget' and 'port'.
This value of this argument decides in which frame the coordinates of the returned point are measured.
"""
point = QPoint(self.CONNECTIONPOINT_X,
self.CONNECTIONPOINT_Y) * self.scale()
if frame == "port":
return point
if frame == "widget":
return self.pos() + point
return self.parent().mapToParent(self.pos() + point)
def connectionDirection(self):
""" Returns the direction in which an attached connection should start.
"""
return self._connectionDirection
def moduleParent(self):
""" Returns parent of this port's parent.
As the port should belong to a ConnectableWidget the function returns the QWidget in which the ConnectableWidget lives.
"""
# Port belongs to module
# Think of better solution. Port shall not create PortConnection.
if self.parent():
return self.parent().parent()
else:
return None
def drawTitle(self, painter):
""" Overwrite VispaWidget.drawTitle()
Do not show title, instead ConnectableWidget will show title/name.
"""
pass
def drawTextField(self, painter):
""" Overwrite VispaWidget.drawTextField()
Do not show text field, just using the text for tooltip.
"""
pass
def mousePressEvent(self, event):
""" Registers position for starting drag.
"""
logging.debug("%s: mousePressEvent()" % self.__class__.__name__)
if self._dragablePort and event.button() == Qt.LeftButton:
self._startDragPosition = QPoint(event.pos())
VispaWidget.mousePressEvent(self, event)
def mouseMoveEvent(self, event):
""" If minimum distance from mousePressEvent is reached initiates dragging.
"""
#logging.debug(self.__class__.__name__ +": mouseMoveEvent()")
if self._dragablePort and self._startDragPosition and bool(
event.buttons() & Qt.LeftButton):
if not self._aimConnection and (
event.pos() - self._startDragPosition
).manhattanLength() >= QApplication.startDragDistance():
self._aimConnection = PointToPointConnection(
self.moduleParent(), self.connectionPoint(),
self.mapTo(self.moduleParent(), event.pos()))
self._aimConnection.setSourceDirection(
self.CONNECTION_DIRECTION)
self.connect(self._aimConnection, SIGNAL("connectionDeleted"),
self.resetAimConnection)
if self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.RIGHT:
self._aimConnection.setTargetDirection(
PointToPointConnection.ConnectionDirection.LEFT)
elif self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.LEFT:
self._aimConnection.setTargetDirection(
PointToPointConnection.ConnectionDirection.RIGHT)
self._aimConnection.show()
elif self._aimConnection:
self._aimConnection.updateTargetPoint(
self.mapTo(self.moduleParent(), event.pos()))
VispaWidget.mouseMoveEvent(self, event)
def mouseReleaseEvent(self, event):
""" Calls realeseMouse() to make sure the widget does not grab the mouse.
Necessary because ConnectableWidgetOwner.propagateEventUnderConnectionWidget() may call grabMouse() on this widget.
"""
logging.debug(self.__class__.__name__ + ": mouseReleaseEvent()")
self.releaseMouse()
if self._dragablePort:
if self._aimConnection:
self._aimConnection.hide() # don't appear as childWidget()
self._aimConnection.delete()
self._aimConnection = None
moduleParentPosition = self.mapTo(self.moduleParent(), event.pos())
#widget = self.moduleParent().childAt(moduleParentPosition)
widget = None
for child in reversed(self.moduleParent().children()):
if isinstance(
child,
QWidget) and child.isVisible() and child.geometry(
).contains(moduleParentPosition) and not isinstance(
child, PortConnection):
widget = child
break
if hasattr(widget, "dropAreaPort"):
localPosition = widget.mapFrom(self.moduleParent(),
moduleParentPosition)
self.moduleParent().addPortConnection(
self, widget.dropAreaPort(localPosition))
elif isinstance(widget, PortWidget):
self.moduleParent().addPortConnection(self, widget)
VispaWidget.mouseReleaseEvent(self, event)
def resetAimConnection(self):
logging.debug("%s: resetAimConnection()" % self.__class__.__name__)
self._aimConnection = None
class PortWidget(VispaWidget):
""" This widget is used to dispay sink and source port of ConnectableWidget.
"""
# Overridden attibutes
WIDTH = 6
HEIGHT = WIDTH
BACKGROUND_SHAPE = 'CIRCLE'
TITLEFIELD_FONTSIZE = 10
SELECTABLE_FLAG = False
# New attributes
PORT_TYPE = ''
CONNECTIONPOINT_X = 3
CONNECTIONPOINT_Y = 3
CONNECTION_DIRECTION = PointToPointConnection.ConnectionDirection.UNDEFINED # Default
DRAG_PORT_TEXT = 'connect port' # Text shown while dragging. The drop event is verified by this string, so should not be empty.
def __init__(self, parent=None, name='default'):
""" Constructor.
"""
VispaWidget.__init__(self, parent)
self.setName(name)
self._connectionDirection = self.CONNECTION_DIRECTION
self._startDragPosition = None
self.setDragable(True)
self._aimConnection = None
self._attachedConnections = []
def attachConnection(self, connection):
self._attachedConnections.append(connection)
def detachConnection(self, connection):
if connection in self._attachedConnections:
self._attachedConnections.remove(connection)
else:
logging.error("%s: detachConnection(): Tried to detach a connection that was not attached ot this port. Aborting..." % self.__class__.__name__)
def updateAttachedConnections(self):
for connection in self._attachedConnections:
connection.updateConnection()
def deleteAttachedConnections(self):
for connection in self._attachedConnections:
connection.delete()
def attachedConnections(self):
return self._attachedConnections
def setDragable(self,dragable, recursive=False):
""" Set whether user can grab the port and connect it to others.
"""
VispaWidget.setDragable(self,False, recursive)
self._dragablePort=dragable
self.setAcceptDrops(dragable)
def isDragable(self):
return self._dragablePort
def setName(self, name):
""" Sets name of port.
Name will be shown as tooltip unless a descriptions is set.
See setDescription().
"""
#self._initTitleField()
#self.titleField().setAutoscale(True, False)
self.setTitle(name)
self.setToolTip(name)
def name(self):
""" Returns name of this port.
"""
if self.titleIsSet():
return self.title()
return ''
def setDescription(self, description):
""" Sets description text of this port.
Description will be shown as tooltip.
"""
self.setText(description)
def description(self):
""" Returns description text.
"""
if self.textFieldIsSet():
return self.textField.getText()
return ''
def portType(self):
""" Return type of this port.
The value has to be set by inheriting classes.
"""
return self.PORT_TYPE
def connectionPoint(self, frame="workspace"):
""" Returns point within this port from which attached connections should start.
Possible values for the optional frame argument are 'workspace' (default or invalid value), 'widget' and 'port'.
This value of this argument decides in which frame the coordinates of the returned point are measured.
"""
point = QPoint(self.CONNECTIONPOINT_X, self.CONNECTIONPOINT_Y) * self.scale()
if frame == "port":
return point
if frame == "widget":
return self.pos() + point
return self.parent().mapToParent(self.pos() + point)
def connectionDirection(self):
""" Returns the direction in which an attached connection should start.
"""
return self._connectionDirection
def moduleParent(self):
""" Returns parent of this port's parent.
As the port should belong to a ConnectableWidget the function returns the QWidget in which the ConnectableWidget lives.
"""
# Port belongs to module
# Think of better solution. Port shall not create PortConnection.
if self.parent():
return self.parent().parent()
else:
return None
def drawTitle(self, painter):
""" Overwrite VispaWidget.drawTitle()
Do not show title, instead ConnectableWidget will show title/name.
"""
pass
def drawTextField(self, painter):
""" Overwrite VispaWidget.drawTextField()
Do not show text field, just using the text for tooltip.
"""
pass
def mousePressEvent(self, event):
""" Registers position for starting drag.
"""
logging.debug("%s: mousePressEvent()" % self.__class__.__name__)
if self._dragablePort and event.button() == Qt.LeftButton:
self._startDragPosition = QPoint(event.pos())
VispaWidget.mousePressEvent(self, event)
def mouseMoveEvent(self, event):
""" If minimum distance from mousePressEvent is reached initiates dragging.
"""
#logging.debug(self.__class__.__name__ +": mouseMoveEvent()")
if self._dragablePort and self._startDragPosition and bool(event.buttons() & Qt.LeftButton):
if not self._aimConnection and (event.pos() - self._startDragPosition).manhattanLength() >= QApplication.startDragDistance():
self._aimConnection = PointToPointConnection(self.moduleParent(), self.connectionPoint(), self.mapTo(self.moduleParent(), event.pos()))
self._aimConnection.setSourceDirection(self.CONNECTION_DIRECTION)
self.connect(self._aimConnection, SIGNAL("connectionDeleted"), self.resetAimConnection)
if self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.RIGHT:
self._aimConnection.setTargetDirection(PointToPointConnection.ConnectionDirection.LEFT)
elif self.CONNECTION_DIRECTION == PointToPointConnection.ConnectionDirection.LEFT:
self._aimConnection.setTargetDirection(PointToPointConnection.ConnectionDirection.RIGHT)
self._aimConnection.show()
elif self._aimConnection:
self._aimConnection.updateTargetPoint(self.mapTo(self.moduleParent(), event.pos()))
VispaWidget.mouseMoveEvent(self, event)
def mouseReleaseEvent(self, event):
""" Calls realeseMouse() to make sure the widget does not grab the mouse.
Necessary because ConnectableWidgetOwner.propagateEventUnderConnectionWidget() may call grabMouse() on this widget.
"""
logging.debug(self.__class__.__name__ +": mouseReleaseEvent()")
self.releaseMouse()
if self._dragablePort:
if self._aimConnection:
self._aimConnection.hide() # don't appear as childWidget()
self._aimConnection.delete()
self._aimConnection = None
moduleParentPosition = self.mapTo(self.moduleParent(), event.pos())
#widget = self.moduleParent().childAt(moduleParentPosition)
widget = None
for child in reversed(self.moduleParent().children()):
if isinstance(child,QWidget) and child.isVisible() and child.geometry().contains(moduleParentPosition) and not isinstance(child, PortConnection):
widget = child
break
if hasattr(widget, "dropAreaPort"):
localPosition = widget.mapFrom(self.moduleParent(), moduleParentPosition)
self.moduleParent().addPortConnection(self, widget.dropAreaPort(localPosition))
elif isinstance(widget, PortWidget):
self.moduleParent().addPortConnection(self, widget)
VispaWidget.mouseReleaseEvent(self, event)
def resetAimConnection(self):
logging.debug("%s: resetAimConnection()" % self.__class__.__name__)
self._aimConnection = None