def shape(self):
if self._rect is not None:
p = QPainterPath()
p.addRect(self.boundingRect())
return p
else:
return super().shape()
def test_shapeFromPath(self):
path = QPainterPath()
path.addRect(10, 10, 20, 20)
pen = QPen(QColor("#FFF"), 2.0)
path = shapeFromPath(path, pen)
self.assertGreaterEqual(area(path.controlPointRect()), (20 + 2.0)**2)
def shape(self):
"""
Returns the shape of this item as a QPainterPath in local coordinates.
"""
path = QPainterPath()
path.addRect(self.rect())
if self.isSelected():
for shape in self.handles.values():
path.addEllipse(shape)
return path
def paintEvent(self, QPaintEvent):
back = (numpy.ones((100, 200, 300)) * 0).astype(numpy.uint8)
back[0:60, 0:60, 0:60] = 255
ol = (numpy.zeros((100, 200, 300))).astype(numpy.uint8)
ol[0:99, 0:99, 0:99] = 120
ol[0:99, 120:140, 0:99] = 255
path = QPainterPath()
path.addRect(20, 20, 60, 60)
path.moveTo(0, 0)
path.cubicTo(99, 0, 50, 50, 99, 99)
path.cubicTo(0, 99, 50, 50, 0, 0)
painter = QPainter(self)
painter.fillRect(0, 0, 100, 100, Qt.Qt.red)
def Path_toQtPath(geom):
p = QPainterPath()
anchor, points = geom
if len(points) > 1:
p.moveTo(*points[0])
for (x, y) in points[1:]:
p.lineTo(x, y)
elif len(points) == 1:
r = QRectF(0, 0, 1e-0, 1e-9)
r.moveCenter(*points[0])
p.addRect(r)
elif len(points) == 0:
r = QRectF(0, 0, 1e-16, 1e-16)
r.moveCenter(QPointF(*anchor))
p.addRect(r)
return p
def path_from_graphics(graphics):
"""
Return a constructed `QPainterPath` for a KEGG pathway graphics element.
"""
path = QPainterPath()
x, y, w, h = [int(graphics.get(c, 0)) for c in
["x", "y", "width", "height"]]
type = graphics.get("type", "rectangle")
if type == "rectangle":
path.addRect(QRectF(x - w / 2, y - h / 2, w, h))
elif type == "roundrectangle":
path.addRoundedRect(QRectF(x - w / 2, y - h / 2, w, h), 10, 10)
elif type == "circle":
path.addEllipse(QRectF(x - w / 2, y - h / 2, w, h))
else:
ValueError("Unknown graphics type %r." % type)
return path
def updateSelectionRect(self, event):
pos = event.scenePos()
buttonDownPos = event.buttonDownScenePos(Qt.LeftButton)
rect = QRectF(pos, buttonDownPos).normalized()
rect = rect.intersected(self.sceneRect())
if not self.selectionRect:
self.selectionRect = QGraphicsRectItem()
self.selectionRect.setBrush(QColor(10, 10, 10, 20))
self.selectionRect.setPen(QPen(QColor(200, 200, 200, 200)))
self.addItem(self.selectionRect)
self.selectionRect.setRect(rect)
if event.modifiers() & Qt.ControlModifier or \
event.modifiers() & Qt.ShiftModifier:
path = self.selectionArea()
else:
path = QPainterPath()
path.addRect(rect)
self.setSelectionArea(path)
self.selectionRectPointChanged.emit(pos)
def keyPressEvent(self, event):
if event.matches(QKeySequence.Delete):
if self.mode == TrackingScene.RemoveCell:
c_ids = []
for item in self.selectedCells():
c_ids = item.cell_id
if c_ids:
self.planRemoveCells(c_ids)
elif self.mode != TrackingScene.AddCell:
pt_ids = []
for item in self.selectedPoints():
pt_ids.append(item.pt_id)
if pt_ids:
self.planRemovePoints(pt_ids)
elif event.key() == Qt.Key_Delete and event.modifiers() | Qt.ShiftModifier:
self.delete_act.trigger()
elif event.matches(QKeySequence.ZoomIn):
self.zoomIn.emit()
elif event.matches(QKeySequence.ZoomOut):
self.zoomOut.emit()
elif event.matches(QKeySequence.SelectAll):
path = QPainterPath()
path.addRect(self.sceneRect())
self.setSelectionArea(path)
def __updateFrame(self):
rect = self.geometry()
rect.moveTo(0, 0)
path = QPainterPath()
path.addRect(rect)
self.__framePathItem.setPath(path)
def _updatePP(self):
"""Create the neck geometry updating this item's QPainterPath.
Return None.
"""
self.prepareGeometryChange()
pp = QPainterPath()
stringSpan = (self.nStrings - 1) * self.stringSpacing
nutWidth = stringSpan + self.stringEdgeOffset * 2
# frets
scaleLen = 25.5
offset = 0.0 # previous fret x coordinate
self.fretXs = [0.0]
for n in range(self.nFrets):
pos = offset + (scaleLen - offset) / 17.817
self.fretXs.append(pos)
pp.moveTo(pos, nutWidth)
pp.lineTo(pos, 0.0)
offset = pos
# marker dots
y = nutWidth / 2.0
for n in [3, 5, 7, 9, 12, 15, 17, 19, 21, 24]:
if n > self.nFrets:
break
fretX1 = self.fretXs[n-1]
fretX2 = self.fretXs[n]
x = fretX1 + (fretX2 - fretX1) / 2.0
d = self.markerDia
r = d / 2.0
dy = nutWidth / 4.0
if n % 12 == 0:
pp.addEllipse(x-r, y-r-dy, d, d)
pp.addEllipse(x-r, y-r+dy, d, d)
else:
pp.addEllipse(x-r, y-r, d, d)
# strings
self.stringYs = []
endX = self.fretXs[-1]
for n in range(self.nStrings):
y = self.stringEdgeOffset + self.stringSpacing * n
self.stringYs.append(y)
pp.moveTo(-self.nutThickness - self.fretXs[1] / 2.0, y)
pp.lineTo(endX, y)
# outline
pp.addRect(0, 0, self.fretXs[-1], nutWidth)
# nut
pp.addRect(-self.nutThickness, 0, self.nutThickness, nutWidth)
# partial headstock, to allow room for open note display
# upper curve
r = 2.0
d = self.fretXs[1] / 2.0
rectL = -self.nutThickness - r
rect = QRectF(rectL, -r*2.0, r*2.0, r*2.0)
ra = asin(d / r)
da = degrees(ra)
pp.arcMoveTo(rect, 270.0)
pp.arcTo(rect, 270.0, -da)
# lower curve
rect = QRectF(rectL, nutWidth, r*2.0, r*2.0)
pp.arcMoveTo(rect, 90.0)
pp.arcTo(rect, 90.0, da)
# x coordinate of open string note markers
self.openX = (-self.nutThickness - sin(ra) * r) / 2.0
self.setPath(pp)
def getSymbolFromCmnd(self, symbol):
'''
Returns a SymbolPath of the specified symbol.
Recognized symbols are:
'.' (period): filled circle
'o' (lowercase oh): unfilled circle
'+': plus mark
'x' (lowercase ex): x mark
'*': asterisk
'^': triangle
"#": square
The path is drawn for a 100 x 100 unit square where
the origin is in the center of the square.
'''
# check if this symbol has already been created
try:
sympath = self.__symbolpaths[symbol]
return sympath
except KeyError:
pass
# new symbol - create a SymbolPath for it
if symbol == '.':
path = QPainterPath()
path.addEllipse(-10.0, -10.0, 20.0, 20.0)
sympath = SymbolPath(path, True)
elif symbol == 'o':
path = QPainterPath()
path.addEllipse(-40.0, -40.0, 80.0, 80.0)
sympath = SymbolPath(path, False)
elif symbol == 'x':
path = QPainterPath(QPointF(-30.0, -30.0))
path.lineTo(30.0, 30.0)
path.moveTo(-30.0, 30.0)
path.lineTo(30.0, -30.0)
sympath = SymbolPath(path, False)
elif symbol == '+':
path = QPainterPath(QPointF(0.0, -40.0))
path.lineTo(0.0, 40.0)
path.moveTo(-40.0, 0.0)
path.lineTo(40.0, 0.0)
sympath = SymbolPath(path, False)
elif symbol == '*':
path = QPainterPath(QPointF(0.0, -40.0))
path.lineTo(0.0, 40.0)
path.moveTo(-34.641, -20.0)
path.lineTo(34.641, 20.0)
path.moveTo(-34.641, 20.0)
path.lineTo(34.641, -20.0)
sympath = SymbolPath(path, False)
elif symbol == '^':
path = QPainterPath(QPointF(-40.0, 30.0))
path.lineTo(0.0, -39.282)
path.lineTo(40.0, 30.0)
path.closeSubpath()
sympath = SymbolPath(path, False)
elif symbol == '#':
path = QPainterPath()
path.addRect(-35.0, -35.0, 70.0, 70.0)
sympath = SymbolPath(path, False)
else:
raise ValueError("Unrecognized symbol '%s'" % str(symbol))
# save and return the SymbolPath
self.__symbolpaths[symbol] = sympath
return sympath
def shape(self):
path = QPainterPath()
path.addRect(self.boundingRect())
return path
# from lazyflow.operators import OpCompressedCache
from PyQt4 import QtCore, uic
from PyQt4.QtGui import QApplication, QPainter, QPainterPath
from PyQt4 import QtGui
from PyQt4 import Qt
app = QtGui.QApplication([])
scene = QtGui.QGraphicsScene()
scene.addText("Hello World!")
back = (numpy.ones((100, 200, 300)) * 0).astype(numpy.uint8)
back[0:60, 0:60, 0:60] = 255
ol = (numpy.zeros((100, 200, 300))).astype(numpy.uint8)
ol[0:99, 0:99, 0:99] = 120
ol[0:99, 120:140, 0:99] = 255
path = QPainterPath()
path.addRect(20, 20, 60, 60)
path.moveTo(0, 0)
path.cubicTo(99, 0, 50, 50, 99, 99)
path.cubicTo(0, 99, 50, 50, 0, 0)
scene.addPath(path)
view = QtGui.QGraphicsView(scene)
view.show()
app.exec_()
class PlotSelectionTool(PlotTool):
"""
A tool for selecting a region on a plot.
"""
#: Selection modes
Rect, Lasso = 1, 2
#: Selection was started by the user.
selectionStarted = Signal(QPainterPath)
#: The current selection has been updated
selectionUpdated = Signal(QPainterPath)
#: The selection has finished (user has released the mouse button)
selectionFinished = Signal(QPainterPath)
def __init__(self, parent=None, selectionMode=Rect, **kwargs):
super().__init__(parent, **kwargs)
self.__mode = selectionMode
self.__path = None
self.__item = None
def setSelectionMode(self, mode):
"""
Set the selection mode (rectangular or lasso selection).
Parameters
----------
mode : int
PlotSelectionTool.Rect or PlotSelectionTool.Lasso
"""
assert mode in {PlotSelectionTool.Rect, PlotSelectionTool.Lasso}
if self.__mode != mode:
if self.__path is not None:
self.selectionFinished.emit()
self.__mode = mode
self.__path = None
def selectionMode(self):
"""
Return the current selection mode.
"""
return self.__mode
def selectionShape(self):
"""
Return the current selection shape.
This is the area selected/drawn by the user.
Returns
-------
shape : QPainterPath
The selection shape in view coordinates.
"""
if self.__path is not None:
shape = QPainterPath(self.__path)
shape.closeSubpath()
else:
shape = QPainterPath()
viewbox = self.viewBox()
if viewbox is None:
return QPainterPath()
return viewbox.childGroup.mapFromParent(shape)
def mousePressEvent(self, event):
if event.button() == Qt.LeftButton:
pos = event.pos()
if self.__mode == PlotSelectionTool.Rect:
rect = QRectF(pos, pos)
self.__path = QPainterPath()
self.__path.addRect(rect)
else:
self.__path = QPainterPath()
self.__path.moveTo(event.pos())
self.selectionStarted.emit(self.selectionShape())
self.__updategraphics()
event.accept()
return True
else:
return False
def mouseMoveEvent(self, event):
if event.buttons() & Qt.LeftButton:
if self.__mode == PlotSelectionTool.Rect:
rect = QRectF(event.buttonDownPos(Qt.LeftButton), event.pos())
self.__path = QPainterPath()
self.__path.addRect(rect)
else:
self.__path.lineTo(event.pos())
self.selectionUpdated.emit(self.selectionShape())
self.__updategraphics()
event.accept()
return True
else:
return False
def mouseReleaseEvent(self, event):
if event.button() == Qt.LeftButton:
if self.__mode == PlotSelectionTool.Rect:
rect = QRectF(event.buttonDownPos(Qt.LeftButton), event.pos())
self.__path = QPainterPath()
self.__path.addRect(rect)
else:
self.__path.lineTo(event.pos())
self.selectionFinished.emit(self.selectionShape())
self.__path = QPainterPath()
self.__updategraphics()
event.accept()
return True
else:
return False
def __updategraphics(self):
viewbox = self.viewBox()
if viewbox is None:
return
if self.__path.isEmpty():
if self.__item is not None:
self.__item.setParentItem(None)
viewbox.removeItem(self.__item)
if self.__item.scene():
self.__item.scene().removeItem(self.__item)
self.__item = None
else:
if self.__item is None:
item = QtGui.QGraphicsPathItem()
color = QtGui.QColor(Qt.yellow)
item.setPen(QtGui.QPen(color, 0))
color.setAlpha(50)
item.setBrush(QtGui.QBrush(color))
self.__item = item
viewbox.addItem(item)
self.__item.setPath(self.selectionShape())
