def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self._multiselect = True
if event.button() == QtCore.Qt.RightButton:
return
elif event.modifiers() == QtCore.Qt.ControlModifier:
pen = QtGui.QPen()
pen.setColor(Colors.selected)
pen.setWidth(3)
pen.setJoinStyle(QtCore.Qt.RoundJoin)
path = QtGui.QPainterPath(event.scenePos())
# currently the selector is only to guide the eye
# selection occurs on hovering the items
# self._selector = self.addPath(path, pen)
self._selector = PainterPathItem(path)
self._selector.setPen(pen)
self.addItem(self._selector)
super(AtGraphicsScene, self).mousePressEvent(event)
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self._multiselect = True
if event.button() == QtCore.Qt.RightButton:
return
elif event.modifiers() == QtCore.Qt.ControlModifier:
pen = QtGui.QPen()
pen.setColor(Colors.selected)
pen.setWidth(3)
pen.setJoinStyle(QtCore.Qt.RoundJoin)
path = QtGui.QPainterPath(event.scenePos())
# currently the selector is only to guide the eye
# selection occurs on hovering the items
# self._selector = self.addPath(path, pen)
self._selector = PainterPathItem(path)
self._selector.setPen(pen)
self.addItem(self._selector)
super(AtGraphicsScene, self).mousePressEvent(event)
class AtGraphicsScene(QtWidgets.QGraphicsScene):
"""GraphicsScene with customized selection functionality
-) double-click -> selects a single item, unselects all other items
-) Ctrl-button + left mouse buuton -> selects all items the mouse moved over
-) Ctrl-button + mouse click -> selects the item clicked,
keeps previous selection
"""
def __init__(self, *args, **kw):
super(AtGraphicsScene, self).__init__(*args, **kw)
self._multiselect = False
self._selector = None
self.selectionChanged.connect(self.onSelectionChanged)
def selectItem(self, item):
if not item.isSelected():
item.setSelected(True)
def itemUnderPos(self, pos):
return self.items(pos)[-1]
def mouseMoveEvent(self, event):
if self._multiselect:
path = self._selector.path()
path.lineTo(event.scenePos())
self._selector.setPath(path)
try:
item = self.itemUnderPos(event.scenePos())
except IndexError:
item = None
if (event.modifiers() == QtCore.Qt.ControlModifier and
item is not None and
self._multiselect):
self.selectItem(item)
else:
super(AtGraphicsScene, self).mouseMoveEvent(event)
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self._multiselect = True
if event.button() == QtCore.Qt.RightButton:
return
elif event.modifiers() == QtCore.Qt.ControlModifier:
pen = QtGui.QPen()
pen.setColor(Colors.selected)
pen.setWidth(3)
pen.setJoinStyle(QtCore.Qt.RoundJoin)
path = QtGui.QPainterPath(event.scenePos())
# currently the selector is only to guide the eye
# selection occurs on hovering the items
# self._selector = self.addPath(path, pen)
self._selector = PainterPathItem(path)
self._selector.setPen(pen)
self.addItem(self._selector)
super(AtGraphicsScene, self).mousePressEvent(event)
def mouseReleaseEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self._multiselect = False
if self._selector is not None:
self.removeItem(self._selector)
self._selector = None
super(AtGraphicsScene, self).mouseReleaseEvent(event)
def optimizeSceneRect(self):
"""Set the scene rect to the smallest possibe rect that contains
all items."""
# slow according to qt-doc
self.setSceneRect(self.itemsBoundingRect())
def onSelectionChanged(self):
view = self.views()[0]
items = self.selectedItems()
hashes = [i.hash for i in items]
view.emitSelectedItems.emit(hashes)
class AtGraphicsScene(QtWidgets.QGraphicsScene):
"""GraphicsScene with customized selection functionality
-) double-click -> selects a single item, unselects all other items
-) Ctrl-button + left mouse buuton -> selects all items the mouse moved over
-) Ctrl-button + mouse click -> selects the item clicked,
keeps previous selection
"""
def __init__(self, *args, **kw):
super(AtGraphicsScene, self).__init__(*args, **kw)
self._multiselect = False
self._selector = None
self.selectionChanged.connect(self.onSelectionChanged)
def selectItem(self, item):
if not item.isSelected():
item.setSelected(True)
def mouseMoveEvent(self, event):
if self._multiselect:
path = self._selector.path()
path.lineTo(event.scenePos())
self._selector.setPath(path)
try:
item = self.items(event.scenePos())[-1]
except IndexError:
item = None
if (event.modifiers() == QtCore.Qt.ControlModifier and item is not None
and self._multiselect):
self.selectItem(item)
else:
super(AtGraphicsScene, self).mouseMoveEvent(event)
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self._multiselect = True
if event.button() == QtCore.Qt.RightButton:
return
elif event.modifiers() == QtCore.Qt.ControlModifier:
pen = QtGui.QPen()
pen.setColor(Colors.selected)
pen.setWidth(3)
pen.setJoinStyle(QtCore.Qt.RoundJoin)
path = QtGui.QPainterPath(event.scenePos())
# currently the selector is only to guide the eye
# selection occurs on hovering the items
# self._selector = self.addPath(path, pen)
self._selector = PainterPathItem(path)
self._selector.setPen(pen)
self.addItem(self._selector)
super(AtGraphicsScene, self).mousePressEvent(event)
def mouseReleaseEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self._multiselect = False
if self._selector is not None:
self.removeItem(self._selector)
self._selector = None
super(AtGraphicsScene, self).mouseReleaseEvent(event)
def optimizeSceneRect(self):
"""Set the scene rect to the smallest possibe rect that contains
all items."""
# slow according to qt-doc
self.setSceneRect(self.itemsBoundingRect())
def selectAll(self):
for item in self.items():
self.selectItem(item)
def invertSelection(self):
for item in self.items():
item.setSelected(not item.isSelected())
def onSelectionChanged(self):
view = self.views()[0]
items = self.selectedItems()
hashes = [i.hash for i in items]
view.emitSelectedItems.emit(hashes)
