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pyqtgraph/graphicsItems/GradientEditorItem.py

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Reorganized directory structure to be more standard Started new SVG exporter Merged updates from ACQ4
2012-12-25 05:43:31 +00:00
from pyqtgraph.Qt import QtGui, QtCore
from pyqtgraph.python2_3 import sortList
import pyqtgraph.functions as fn
from .GraphicsObject import GraphicsObject
from .GraphicsWidget import GraphicsWidget
import weakref
from pyqtgraph.pgcollections import OrderedDict
import numpy as np
__all__ = ['TickSliderItem', 'GradientEditorItem']
Gradients = OrderedDict([
('thermal', {'ticks': [(0.3333, (185, 0, 0, 255)), (0.6666, (255, 220, 0, 255)), (1, (255, 255, 255, 255)), (0, (0, 0, 0, 255))], 'mode': 'rgb'}),
('flame', {'ticks': [(0.2, (7, 0, 220, 255)), (0.5, (236, 0, 134, 255)), (0.8, (246, 246, 0, 255)), (1.0, (255, 255, 255, 255)), (0.0, (0, 0, 0, 255))], 'mode': 'rgb'}),
('yellowy', {'ticks': [(0.0, (0, 0, 0, 255)), (0.2328863796753704, (32, 0, 129, 255)), (0.8362738179251941, (255, 255, 0, 255)), (0.5257586450247, (115, 15, 255, 255)), (1.0, (255, 255, 255, 255))], 'mode': 'rgb'} ),
('bipolar', {'ticks': [(0.0, (0, 255, 255, 255)), (1.0, (255, 255, 0, 255)), (0.5, (0, 0, 0, 255)), (0.25, (0, 0, 255, 255)), (0.75, (255, 0, 0, 255))], 'mode': 'rgb'}),
('spectrum', {'ticks': [(1.0, (255, 0, 255, 255)), (0.0, (255, 0, 0, 255))], 'mode': 'hsv'}),
('cyclic', {'ticks': [(0.0, (255, 0, 4, 255)), (1.0, (255, 0, 0, 255))], 'mode': 'hsv'}),
('greyclip', {'ticks': [(0.0, (0, 0, 0, 255)), (0.99, (255, 255, 255, 255)), (1.0, (255, 0, 0, 255))], 'mode': 'rgb'}),
('grey', {'ticks': [(0.0, (0, 0, 0, 255)), (1.0, (255, 255, 255, 255))], 'mode': 'rgb'}),
])
class TickSliderItem(GraphicsWidget):
## public class
"""**Bases:** :class:`GraphicsWidget <pyqtgraph.GraphicsWidget>`
A rectangular item with tick marks along its length that can (optionally) be moved by the user."""
def __init__(self, orientation='bottom', allowAdd=True, **kargs):
"""
============= =================================================================================
**Arguments**
orientation Set the orientation of the gradient. Options are: 'left', 'right'
'top', and 'bottom'.
allowAdd Specifies whether ticks can be added to the item by the user.
tickPen Default is white. Specifies the color of the outline of the ticks.
Can be any of the valid arguments for :func:`mkPen <pyqtgraph.mkPen>`
============= =================================================================================
"""
## public
GraphicsWidget.__init__(self)
self.orientation = orientation
self.length = 100
self.tickSize = 15
self.ticks = {}
self.maxDim = 20
self.allowAdd = allowAdd
if 'tickPen' in kargs:
self.tickPen = fn.mkPen(kargs['tickPen'])
else:
self.tickPen = fn.mkPen('w')
self.orientations = {
'left': (90, 1, 1),
'right': (90, 1, 1),
'top': (0, 1, -1),
'bottom': (0, 1, 1)
}
self.setOrientation(orientation)
#self.setFrameStyle(QtGui.QFrame.NoFrame | QtGui.QFrame.Plain)
#self.setBackgroundRole(QtGui.QPalette.NoRole)
#self.setMouseTracking(True)
#def boundingRect(self):
#return self.mapRectFromParent(self.geometry()).normalized()
#def shape(self): ## No idea why this is necessary, but rotated items do not receive clicks otherwise.
#p = QtGui.QPainterPath()
#p.addRect(self.boundingRect())
#return p
def paint(self, p, opt, widget):
#p.setPen(fn.mkPen('g', width=3))
#p.drawRect(self.boundingRect())
return
def keyPressEvent(self, ev):
ev.ignore()
def setMaxDim(self, mx=None):
if mx is None:
mx = self.maxDim
else:
self.maxDim = mx
if self.orientation in ['bottom', 'top']:
self.setFixedHeight(mx)
self.setMaximumWidth(16777215)
else:
self.setFixedWidth(mx)
self.setMaximumHeight(16777215)
def setOrientation(self, orientation):
## public
"""Set the orientation of the TickSliderItem.
============= ===================================================================
**Arguments**
orientation Options are: 'left', 'right', 'top', 'bottom'
The orientation option specifies which side of the slider the
ticks are on, as well as whether the slider is vertical ('right'
and 'left') or horizontal ('top' and 'bottom').
============= ===================================================================
"""
self.orientation = orientation
self.setMaxDim()
self.resetTransform()
ort = orientation
if ort == 'top':
self.scale(1, -1)
self.translate(0, -self.height())
elif ort == 'left':
self.rotate(270)
self.scale(1, -1)
self.translate(-self.height(), -self.maxDim)
elif ort == 'right':
self.rotate(270)
self.translate(-self.height(), 0)
#self.setPos(0, -self.height())
elif ort != 'bottom':
raise Exception("%s is not a valid orientation. Options are 'left', 'right', 'top', and 'bottom'" %str(ort))
self.translate(self.tickSize/2., 0)
def addTick(self, x, color=None, movable=True):
## public
"""
Add a tick to the item.
============= ==================================================================
**Arguments**
x Position where tick should be added.
color Color of added tick. If color is not specified, the color will be
white.
movable Specifies whether the tick is movable with the mouse.
============= ==================================================================
"""
if color is None:
color = QtGui.QColor(255,255,255)
tick = Tick(self, [x*self.length, 0], color, movable, self.tickSize, pen=self.tickPen)
self.ticks[tick] = x
tick.setParentItem(self)
return tick
def removeTick(self, tick):
## public
"""
Removes the specified tick.
"""
del self.ticks[tick]
tick.setParentItem(None)
if self.scene() is not None:
self.scene().removeItem(tick)
def tickMoved(self, tick, pos):
#print "tick changed"
## Correct position of tick if it has left bounds.
newX = min(max(0, pos.x()), self.length)
pos.setX(newX)
tick.setPos(pos)
self.ticks[tick] = float(newX) / self.length
def tickMoveFinished(self, tick):
pass
def tickClicked(self, tick, ev):
if ev.button() == QtCore.Qt.RightButton:
self.removeTick(tick)
def widgetLength(self):
if self.orientation in ['bottom', 'top']:
return self.width()
else:
return self.height()
def resizeEvent(self, ev):
wlen = max(40, self.widgetLength())
self.setLength(wlen-self.tickSize-2)
self.setOrientation(self.orientation)
#bounds = self.scene().itemsBoundingRect()
#bounds.setLeft(min(-self.tickSize*0.5, bounds.left()))
#bounds.setRight(max(self.length + self.tickSize, bounds.right()))
#self.setSceneRect(bounds)
#self.fitInView(bounds, QtCore.Qt.KeepAspectRatio)
def setLength(self, newLen):
#private
for t, x in list(self.ticks.items()):
t.setPos(x * newLen + 1, t.pos().y())
self.length = float(newLen)
#def mousePressEvent(self, ev):
#QtGui.QGraphicsView.mousePressEvent(self, ev)
#self.ignoreRelease = False
#for i in self.items(ev.pos()):
#if isinstance(i, Tick):
#self.ignoreRelease = True
#break
##if len(self.items(ev.pos())) > 0: ## Let items handle their own clicks
##self.ignoreRelease = True
#def mouseReleaseEvent(self, ev):
#QtGui.QGraphicsView.mouseReleaseEvent(self, ev)
#if self.ignoreRelease:
#return
#pos = self.mapToScene(ev.pos())
#if ev.button() == QtCore.Qt.LeftButton and self.allowAdd:
#if pos.x() < 0 or pos.x() > self.length:
#return
#if pos.y() < 0 or pos.y() > self.tickSize:
#return
#pos.setX(min(max(pos.x(), 0), self.length))
#self.addTick(pos.x()/self.length)
#elif ev.button() == QtCore.Qt.RightButton:
#self.showMenu(ev)
def mouseClickEvent(self, ev):
if ev.button() == QtCore.Qt.LeftButton and self.allowAdd:
pos = ev.pos()
if pos.x() < 0 or pos.x() > self.length:
return
if pos.y() < 0 or pos.y() > self.tickSize:
return
pos.setX(min(max(pos.x(), 0), self.length))
self.addTick(pos.x()/self.length)
elif ev.button() == QtCore.Qt.RightButton:
self.showMenu(ev)
#if ev.button() == QtCore.Qt.RightButton:
#if self.moving:
#ev.accept()
#self.setPos(self.startPosition)
#self.moving = False
#self.sigMoving.emit(self)
#self.sigMoved.emit(self)
#else:
#pass
#self.view().tickClicked(self, ev)
###remove
def hoverEvent(self, ev):
if (not ev.isExit()) and ev.acceptClicks(QtCore.Qt.LeftButton):
ev.acceptClicks(QtCore.Qt.RightButton)
## show ghost tick
#self.currentPen = fn.mkPen(255, 0,0)
#else:
#self.currentPen = self.pen
#self.update()
def showMenu(self, ev):
pass
def setTickColor(self, tick, color):
"""Set the color of the specified tick.
============= ==================================================================
**Arguments**
tick Can be either an integer corresponding to the index of the tick
or a Tick object. Ex: if you had a slider with 3 ticks and you
wanted to change the middle tick, the index would be 1.
color The color to make the tick. Can be any argument that is valid for
:func:`mkBrush <pyqtgraph.mkBrush>`
============= ==================================================================
"""
tick = self.getTick(tick)
tick.color = color
tick.update()
#tick.setBrush(QtGui.QBrush(QtGui.QColor(tick.color)))
def setTickValue(self, tick, val):
## public
"""
Set the position (along the slider) of the tick.
============= ==================================================================
**Arguments**
tick Can be either an integer corresponding to the index of the tick
or a Tick object. Ex: if you had a slider with 3 ticks and you
wanted to change the middle tick, the index would be 1.
val The desired position of the tick. If val is < 0, position will be
set to 0. If val is > 1, position will be set to 1.
============= ==================================================================
"""
tick = self.getTick(tick)
val = min(max(0.0, val), 1.0)
x = val * self.length
pos = tick.pos()
pos.setX(x)
tick.setPos(pos)
self.ticks[tick] = val
def tickValue(self, tick):
## public
"""Return the value (from 0.0 to 1.0) of the specified tick.
============= ==================================================================
**Arguments**
tick Can be either an integer corresponding to the index of the tick
or a Tick object. Ex: if you had a slider with 3 ticks and you
wanted the value of the middle tick, the index would be 1.
============= ==================================================================
"""
tick = self.getTick(tick)
return self.ticks[tick]
def getTick(self, tick):
## public
"""Return the Tick object at the specified index.
============= ==================================================================
**Arguments**
tick An integer corresponding to the index of the desired tick. If the
argument is not an integer it will be returned unchanged.
============= ==================================================================
"""
if type(tick) is int:
tick = self.listTicks()[tick][0]
return tick
#def mouseMoveEvent(self, ev):
#QtGui.QGraphicsView.mouseMoveEvent(self, ev)
def listTicks(self):
"""Return a sorted list of all the Tick objects on the slider."""
## public
ticks = list(self.ticks.items())
sortList(ticks, lambda a,b: cmp(a[1], b[1])) ## see pyqtgraph.python2_3.sortList
return ticks
class GradientEditorItem(TickSliderItem):
"""
**Bases:** :class:`TickSliderItem <pyqtgraph.TickSliderItem>`
An item that can be used to define a color gradient. Implements common pre-defined gradients that are
customizable by the user. :class: `GradientWidget <pyqtgraph.GradientWidget>` provides a widget
with a GradientEditorItem that can be added to a GUI.
================================ ===========================================================
**Signals**
sigGradientChanged(self) Signal is emitted anytime the gradient changes. The signal
is emitted in real time while ticks are being dragged or
colors are being changed.
sigGradientChangeFinished(self) Signal is emitted when the gradient is finished changing.
================================ ===========================================================
"""
sigGradientChanged = QtCore.Signal(object)
sigGradientChangeFinished = QtCore.Signal(object)
def __init__(self, *args, **kargs):
"""
Create a new GradientEditorItem.
All arguments are passed to :func:`TickSliderItem.__init__ <pyqtgraph.TickSliderItem.__init__>`
============= =================================================================================
**Arguments**
orientation Set the orientation of the gradient. Options are: 'left', 'right'
'top', and 'bottom'.
allowAdd Default is True. Specifies whether ticks can be added to the item.
tickPen Default is white. Specifies the color of the outline of the ticks.
Can be any of the valid arguments for :func:`mkPen <pyqtgraph.mkPen>`
============= =================================================================================
"""
self.currentTick = None
self.currentTickColor = None
self.rectSize = 15
self.gradRect = QtGui.QGraphicsRectItem(QtCore.QRectF(0, self.rectSize, 100, self.rectSize))
self.backgroundRect = QtGui.QGraphicsRectItem(QtCore.QRectF(0, -self.rectSize, 100, self.rectSize))
self.backgroundRect.setBrush(QtGui.QBrush(QtCore.Qt.DiagCrossPattern))
self.colorMode = 'rgb'
TickSliderItem.__init__(self, *args, **kargs)
self.colorDialog = QtGui.QColorDialog()
self.colorDialog.setOption(QtGui.QColorDialog.ShowAlphaChannel, True)
self.colorDialog.setOption(QtGui.QColorDialog.DontUseNativeDialog, True)
self.colorDialog.currentColorChanged.connect(self.currentColorChanged)
self.colorDialog.rejected.connect(self.currentColorRejected)
self.colorDialog.accepted.connect(self.currentColorAccepted)
self.backgroundRect.setParentItem(self)
self.gradRect.setParentItem(self)
self.setMaxDim(self.rectSize + self.tickSize)
self.rgbAction = QtGui.QAction('RGB', self)
self.rgbAction.setCheckable(True)
self.rgbAction.triggered.connect(lambda: self.setColorMode('rgb'))
self.hsvAction = QtGui.QAction('HSV', self)
self.hsvAction.setCheckable(True)
self.hsvAction.triggered.connect(lambda: self.setColorMode('hsv'))
self.menu = QtGui.QMenu()
## build context menu of gradients
l = self.length
self.length = 100
global Gradients
for g in Gradients:
px = QtGui.QPixmap(100, 15)
p = QtGui.QPainter(px)
self.restoreState(Gradients[g])
grad = self.getGradient()
brush = QtGui.QBrush(grad)
p.fillRect(QtCore.QRect(0, 0, 100, 15), brush)
p.end()
label = QtGui.QLabel()
label.setPixmap(px)
label.setContentsMargins(1, 1, 1, 1)
act = QtGui.QWidgetAction(self)
act.setDefaultWidget(label)
act.triggered.connect(self.contextMenuClicked)
act.name = g
self.menu.addAction(act)
self.length = l
self.menu.addSeparator()
self.menu.addAction(self.rgbAction)
self.menu.addAction(self.hsvAction)
for t in list(self.ticks.keys()):
self.removeTick(t)
self.addTick(0, QtGui.QColor(0,0,0), True)
self.addTick(1, QtGui.QColor(255,0,0), True)
self.setColorMode('rgb')
self.updateGradient()
def setOrientation(self, orientation):
## public
"""
Set the orientation of the GradientEditorItem.
============= ===================================================================
**Arguments**
orientation Options are: 'left', 'right', 'top', 'bottom'
The orientation option specifies which side of the gradient the
ticks are on, as well as whether the gradient is vertical ('right'
and 'left') or horizontal ('top' and 'bottom').
============= ===================================================================
"""
TickSliderItem.setOrientation(self, orientation)
self.translate(0, self.rectSize)
def showMenu(self, ev):
#private
self.menu.popup(ev.screenPos().toQPoint())
def contextMenuClicked(self, b=None):
#private
#global Gradients
act = self.sender()
self.loadPreset(act.name)
def loadPreset(self, name):
"""
Load a predefined gradient.
""" ## TODO: provide image with names of defined gradients
#global Gradients
self.restoreState(Gradients[name])
def setColorMode(self, cm):
"""
Set the color mode for the gradient. Options are: 'hsv', 'rgb'
"""
## public
if cm not in ['rgb', 'hsv']:
raise Exception("Unknown color mode %s. Options are 'rgb' and 'hsv'." % str(cm))
try:
self.rgbAction.blockSignals(True)
self.hsvAction.blockSignals(True)
self.rgbAction.setChecked(cm == 'rgb')
self.hsvAction.setChecked(cm == 'hsv')
finally:
self.rgbAction.blockSignals(False)
self.hsvAction.blockSignals(False)
self.colorMode = cm
self.updateGradient()
def updateGradient(self):
#private
self.gradient = self.getGradient()
self.gradRect.setBrush(QtGui.QBrush(self.gradient))
self.sigGradientChanged.emit(self)
def setLength(self, newLen):
#private (but maybe public)
TickSliderItem.setLength(self, newLen)
self.backgroundRect.setRect(1, -self.rectSize, newLen, self.rectSize)
self.gradRect.setRect(1, -self.rectSize, newLen, self.rectSize)
self.updateGradient()
def currentColorChanged(self, color):
#private
if color.isValid() and self.currentTick is not None:
self.setTickColor(self.currentTick, color)
self.updateGradient()
def currentColorRejected(self):
#private
self.setTickColor(self.currentTick, self.currentTickColor)
self.updateGradient()
def currentColorAccepted(self):
self.sigGradientChangeFinished.emit(self)
def tickClicked(self, tick, ev):
#private
if ev.button() == QtCore.Qt.LeftButton:
if not tick.colorChangeAllowed:
return
self.currentTick = tick
self.currentTickColor = tick.color
self.colorDialog.setCurrentColor(tick.color)
self.colorDialog.open()
#color = QtGui.QColorDialog.getColor(tick.color, self, "Select Color", QtGui.QColorDialog.ShowAlphaChannel)
#if color.isValid():
#self.setTickColor(tick, color)
#self.updateGradient()
elif ev.button() == QtCore.Qt.RightButton:
if not tick.removeAllowed:
return
if len(self.ticks) > 2:
self.removeTick(tick)
self.updateGradient()
def tickMoved(self, tick, pos):
#private
TickSliderItem.tickMoved(self, tick, pos)
self.updateGradient()
def tickMoveFinished(self, tick):
self.sigGradientChangeFinished.emit(self)
def getGradient(self):
"""Return a QLinearGradient object."""
g = QtGui.QLinearGradient(QtCore.QPointF(0,0), QtCore.QPointF(self.length,0))
if self.colorMode == 'rgb':
ticks = self.listTicks()
g.setStops([(x, QtGui.QColor(t.color)) for t,x in ticks])
elif self.colorMode == 'hsv': ## HSV mode is approximated for display by interpolating 10 points between each stop
ticks = self.listTicks()
stops = []
stops.append((ticks[0][1], ticks[0][0].color))
for i in range(1,len(ticks)):
x1 = ticks[i-1][1]
x2 = ticks[i][1]
dx = (x2-x1) / 10.
for j in range(1,10):
x = x1 + dx*j
stops.append((x, self.getColor(x)))
stops.append((x2, self.getColor(x2)))
g.setStops(stops)
return g
def getColor(self, x, toQColor=True):
"""
Return a color for a given value.
============= ==================================================================
**Arguments**
x Value (position on gradient) of requested color.
toQColor If true, returns a QColor object, else returns a (r,g,b,a) tuple.
============= ==================================================================
"""
ticks = self.listTicks()
if x <= ticks[0][1]:
c = ticks[0][0].color
if toQColor:
return QtGui.QColor(c) # always copy colors before handing them out
else:
return (c.red(), c.green(), c.blue(), c.alpha())
if x >= ticks[-1][1]:
c = ticks[-1][0].color
if toQColor:
return QtGui.QColor(c) # always copy colors before handing them out
else:
return (c.red(), c.green(), c.blue(), c.alpha())
x2 = ticks[0][1]
for i in range(1,len(ticks)):
x1 = x2
x2 = ticks[i][1]
if x1 <= x and x2 >= x:
break
dx = (x2-x1)
if dx == 0:
f = 0.
else:
f = (x-x1) / dx
c1 = ticks[i-1][0].color
c2 = ticks[i][0].color
if self.colorMode == 'rgb':
r = c1.red() * (1.-f) + c2.red() * f
g = c1.green() * (1.-f) + c2.green() * f
b = c1.blue() * (1.-f) + c2.blue() * f
a = c1.alpha() * (1.-f) + c2.alpha() * f
if toQColor:
return QtGui.QColor(r, g, b,a)
else:
return (r,g,b,a)
elif self.colorMode == 'hsv':
h1,s1,v1,_ = c1.getHsv()
h2,s2,v2,_ = c2.getHsv()
h = h1 * (1.-f) + h2 * f
s = s1 * (1.-f) + s2 * f
v = v1 * (1.-f) + v2 * f
c = QtGui.QColor()
c.setHsv(h,s,v)
if toQColor:
return c
else:
return (c.red(), c.green(), c.blue(), c.alpha())
def getLookupTable(self, nPts, alpha=None):
"""
Return an RGB(A) lookup table (ndarray).
============= ============================================================================
**Arguments**
nPts The number of points in the returned lookup table.
alpha True, False, or None - Specifies whether or not alpha values are included
in the table.If alpha is None, alpha will be automatically determined.
============= ============================================================================
"""
if alpha is None:
alpha = self.usesAlpha()
if alpha:
table = np.empty((nPts,4), dtype=np.ubyte)
else:
table = np.empty((nPts,3), dtype=np.ubyte)
for i in range(nPts):
x = float(i)/(nPts-1)
color = self.getColor(x, toQColor=False)
table[i] = color[:table.shape[1]]
return table
def usesAlpha(self):
"""Return True if any ticks have an alpha < 255"""
ticks = self.listTicks()
for t in ticks:
if t[0].color.alpha() < 255:
return True
return False
def isLookupTrivial(self):
"""Return True if the gradient has exactly two stops in it: black at 0.0 and white at 1.0"""
ticks = self.listTicks()
if len(ticks) != 2:
return False
if ticks[0][1] != 0.0 or ticks[1][1] != 1.0:
return False
c1 = fn.colorTuple(ticks[0][0].color)
c2 = fn.colorTuple(ticks[1][0].color)
if c1 != (0,0,0,255) or c2 != (255,255,255,255):
return False
return True
def mouseReleaseEvent(self, ev):
#private
TickSliderItem.mouseReleaseEvent(self, ev)
self.updateGradient()
def addTick(self, x, color=None, movable=True, finish=True):
"""
Add a tick to the gradient. Return the tick.
============= ==================================================================
**Arguments**
x Position where tick should be added.
color Color of added tick. If color is not specified, the color will be
the color of the gradient at the specified position.
movable Specifies whether the tick is movable with the mouse.
============= ==================================================================
"""
if color is None:
color = self.getColor(x)
t = TickSliderItem.addTick(self, x, color=color, movable=movable)
t.colorChangeAllowed = True
t.removeAllowed = True
if finish:
self.sigGradientChangeFinished.emit(self)
return t
def removeTick(self, tick, finish=True):
TickSliderItem.removeTick(self, tick)
if finish:
self.sigGradientChangeFinished.emit(self)
def saveState(self):
"""
Return a dictionary with parameters for rebuilding the gradient. Keys will include:
- 'mode': hsv or rgb
- 'ticks': a list of tuples (pos, (r,g,b,a))
"""
## public
ticks = []
for t in self.ticks:
c = t.color
ticks.append((self.ticks[t], (c.red(), c.green(), c.blue(), c.alpha())))
state = {'mode': self.colorMode, 'ticks': ticks}
return state
def restoreState(self, state):
"""
Restore the gradient specified in state.
============= ====================================================================
**Arguments**
state A dictionary with same structure as those returned by
:func:`saveState <pyqtgraph.GradientEditorItem.saveState>`
Keys must include:
- 'mode': hsv or rgb
- 'ticks': a list of tuples (pos, (r,g,b,a))
============= ====================================================================
"""
## public
self.setColorMode(state['mode'])
for t in list(self.ticks.keys()):
self.removeTick(t, finish=False)
for t in state['ticks']:
c = QtGui.QColor(*t[1])
self.addTick(t[0], c, finish=False)
self.updateGradient()
self.sigGradientChangeFinished.emit(self)
class Tick(GraphicsObject):
## private class
sigMoving = QtCore.Signal(object)
sigMoved = QtCore.Signal(object)
def __init__(self, view, pos, color, movable=True, scale=10, pen='w'):
self.movable = movable
self.moving = False
self.view = weakref.ref(view)
self.scale = scale
self.color = color
self.pen = fn.mkPen(pen)
self.hoverPen = fn.mkPen(255,255,0)
self.currentPen = self.pen
self.pg = QtGui.QPainterPath(QtCore.QPointF(0,0))
self.pg.lineTo(QtCore.QPointF(-scale/3**0.5, scale))
self.pg.lineTo(QtCore.QPointF(scale/3**0.5, scale))
self.pg.closeSubpath()
GraphicsObject.__init__(self)
self.setPos(pos[0], pos[1])
if self.movable:
self.setZValue(1)
else:
self.setZValue(0)
def boundingRect(self):
return self.pg.boundingRect()
def shape(self):
return self.pg
def paint(self, p, *args):
p.setRenderHints(QtGui.QPainter.Antialiasing)
p.fillPath(self.pg, fn.mkBrush(self.color))
p.setPen(self.currentPen)
p.drawPath(self.pg)
def mouseDragEvent(self, ev):
if self.movable and ev.button() == QtCore.Qt.LeftButton:
if ev.isStart():
self.moving = True
self.cursorOffset = self.pos() - self.mapToParent(ev.buttonDownPos())
self.startPosition = self.pos()
ev.accept()
if not self.moving:
return
newPos = self.cursorOffset + self.mapToParent(ev.pos())
newPos.setY(self.pos().y())
self.setPos(newPos)
self.view().tickMoved(self, newPos)
self.sigMoving.emit(self)
if ev.isFinish():
self.moving = False
self.sigMoved.emit(self)
self.view().tickMoveFinished(self)
def mouseClickEvent(self, ev):
if ev.button() == QtCore.Qt.RightButton and self.moving:
ev.accept()
self.setPos(self.startPosition)
self.view().tickMoved(self, self.startPosition)
self.moving = False
self.sigMoving.emit(self)
self.sigMoved.emit(self)
else:
self.view().tickClicked(self, ev)
##remove
def hoverEvent(self, ev):
if (not ev.isExit()) and ev.acceptDrags(QtCore.Qt.LeftButton):
ev.acceptClicks(QtCore.Qt.LeftButton)
ev.acceptClicks(QtCore.Qt.RightButton)
self.currentPen = self.hoverPen
else:
self.currentPen = self.pen
self.update()
#def mouseMoveEvent(self, ev):
##print self, "move", ev.scenePos()
#if not self.movable:
#return
#if not ev.buttons() & QtCore.Qt.LeftButton:
#return
#newPos = ev.scenePos() + self.mouseOffset
#newPos.setY(self.pos().y())
##newPos.setX(min(max(newPos.x(), 0), 100))
#self.setPos(newPos)
#self.view().tickMoved(self, newPos)
#self.movedSincePress = True
##self.emit(QtCore.SIGNAL('tickChanged'), self)
#ev.accept()
#def mousePressEvent(self, ev):
#self.movedSincePress = False
#if ev.button() == QtCore.Qt.LeftButton:
#ev.accept()
#self.mouseOffset = self.pos() - ev.scenePos()
#self.pressPos = ev.scenePos()
#elif ev.button() == QtCore.Qt.RightButton:
#ev.accept()
##if self.endTick:
##return
##self.view.tickChanged(self, delete=True)
#def mouseReleaseEvent(self, ev):
##print self, "release", ev.scenePos()
#if not self.movedSincePress:
#self.view().tickClicked(self, ev)
##if ev.button() == QtCore.Qt.LeftButton and ev.scenePos() == self.pressPos:
##color = QtGui.QColorDialog.getColor(self.color, None, "Select Color", QtGui.QColorDialog.ShowAlphaChannel)
##if color.isValid():
##self.color = color
##self.setBrush(QtGui.QBrush(QtGui.QColor(self.color)))
###self.emit(QtCore.SIGNAL('tickChanged'), self)
##self.view.tickChanged(self)
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