from PyQt4 import QtCore
+_TWOPI = 2 * math.pi
+
+
def _radius_at(center, pos):
delta = pos - center
xDelta = delta.x()
radius = math.sqrt(xDelta ** 2 + yDelta ** 2)
angle = math.acos(xDelta / radius)
if 0 <= yDelta:
- angle = 2*math.pi - angle
+ angle = _TWOPI - angle
return angle
self._children = []
self._center = self.NULL_CENTER
+ self._cacheIndexToAngle = {}
+ self._cacheTotalWeight = 0
+
def insertItem(self, item, index = -1):
self._children.insert(index, item)
+ self._invalidate_cache()
def removeItemAt(self, index):
item = self._children.pop(index)
+ self._invalidate_cache()
def set_center(self, item):
if item is None:
def clear(self):
del self._children[:]
+ self._center = self.NULL_CENTER
+ self._invalidate_cache()
def itemAt(self, index):
return self._children[index]
def __getitem__(self, index):
return self._children[index]
+ def _invalidate_cache(self):
+ self._cacheIndexToAngle.clear()
+ self._cacheTotalWeight = sum(child.weight() for child in self._children)
+ if self._cacheTotalWeight == 0:
+ self._cacheTotalWeight = 1
+
def _index_to_angle(self, index, isShifted):
+ key = index, isShifted
+ if key in self._cacheIndexToAngle:
+ return self._cacheIndexToAngle[key]
index = index % len(self._children)
- totalWeight = sum(child.weight() for child in self._children)
- if totalWeight == 0:
- totalWeight = 1
- baseAngle = (2 * math.pi) / totalWeight
+ baseAngle = _TWOPI / self._cacheTotalWeight
angle = math.pi / 2
if isShifted:
else:
angle -= baseAngle / 2
while angle < 0:
- angle += 2*math.pi
+ angle += _TWOPI
for i, child in enumerate(self._children):
if index < i:
break
angle += child.weight() * baseAngle
- while (2*math.pi) < angle:
- angle -= 2*math.pi
+ while _TWOPI < angle:
+ angle -= _TWOPI
+ self._cacheIndexToAngle[key] = angle
return angle
def _angle_to_index(self, angle):
if numChildren == 0:
return self.SELECTION_CENTER
- totalWeight = sum(child.weight() for child in self._children)
- if totalWeight == 0:
- totalWeight = 1
- baseAngle = (2 * math.pi) / totalWeight
+ baseAngle = _TWOPI / self._cacheTotalWeight
iterAngle = math.pi / 2 - (self.itemAt(0).weight() * baseAngle) / 2
while iterAngle < 0:
- iterAngle += 2 * math.pi
+ iterAngle += _TWOPI
oldIterAngle = iterAngle
for index, child in enumerate(self._children):
iterAngle += child.weight() * baseAngle
if oldIterAngle < angle and angle <= iterAngle:
return index - 1 if index != 0 else numChildren - 1
- elif oldIterAngle < (angle + 2*math.pi) and (angle + 2*math.pi <= iterAngle):
+ elif oldIterAngle < (angle + _TWOPI) and (angle + _TWOPI <= iterAngle):
return index - 1 if index != 0 else numChildren - 1
oldIterAngle = iterAngle
a = self._filing._index_to_angle(i, True)
b = self._filing._index_to_angle(i + 1, True)
if b < a:
- b += 2*math.pi
+ b += _TWOPI
size = b - a
if size < 0:
- size += 2*math.pi
+ size += _TWOPI
- startAngleInDeg = (a * 360 * 16) / (2*math.pi)
- sizeInDeg = (size * 360 * 16) / (2*math.pi)
+ startAngleInDeg = (a * 360 * 16) / _TWOPI
+ sizeInDeg = (size * 360 * 16) / _TWOPI
painter.drawPie(adjustmentRect, int(startAngleInDeg), int(sizeInDeg))
def _paint_slice_foreground(self, painter, i, selectionIndex):
a = self._filing._index_to_angle(i, True)
b = self._filing._index_to_angle(i + 1, True)
if b < a:
- b += 2*math.pi
+ b += _TWOPI
middleAngle = (a + b) / 2
averageRadius = (self._cachedInnerRadius + self._cachedOuterRadius) / 2
def __init__(self, buttonSlice, parent = None):
QtGui.QWidget.__init__(self, parent)
+ self._cachedCenterPosition = self.rect().center()
+
self._filing = PieFiling()
self._display = QPieDisplay(self._filing, None, QtCore.Qt.SplashScreen)
self._selectionIndex = PieFiling.SELECTION_NONE
return self._filing.itemAt(index)
def indexAt(self, point):
- return self._filing.indexAt(self.rect().center(), point)
+ return self._filing.indexAt(self._cachedCenterPosition, point)
def innerRadius(self):
return self._filing.innerRadius()
lastMousePos = mouseEvent.pos()
self._mousePosition = lastMousePos
- self._update_selection(self.rect().center())
+ self._update_selection(self._cachedCenterPosition)
if lastSelection != self._selectionIndex:
self.highlighted.emit(self._selectionIndex)
self._update_selection(lastMousePos)
else:
# Relative
- self._update_selection(self.rect().center() + (lastMousePos - self._mousePosition))
+ self._update_selection(self._cachedCenterPosition + (lastMousePos - self._mousePosition))
if lastSelection != self._selectionIndex:
self.highlighted.emit(self._selectionIndex)
self._update_selection(lastMousePos)
else:
# Relative
- self._update_selection(self.rect().center() + (lastMousePos - self._mousePosition))
+ self._update_selection(self._cachedCenterPosition + (lastMousePos - self._mousePosition))
self._mousePosition = None
self._activate_at(self._selectionIndex)
def showEvent(self, showEvent):
self._buttonArtist.show(self.palette())
+ self._cachedCenterPosition = self.rect().center()
QtGui.QWidget.showEvent(self, showEvent)
self._selectionIndex = index
def _update_selection(self, lastMousePos):
- radius = _radius_at(self.rect().center(), lastMousePos)
+ radius = _radius_at(self._cachedCenterPosition, lastMousePos)
if radius < self._filing.innerRadius():
self._select_at(PieFiling.SELECTION_CENTER)
elif radius <= self._filing.outerRadius():
def __init__(self, parent = None):
QtGui.QWidget.__init__(self, parent)
+ self._cachedCenterPosition = self.rect().center()
+
self._filing = PieFiling()
self._artist = PieArtist(self._filing)
self._selectionIndex = PieFiling.SELECTION_NONE
return self._filing.itemAt(index)
def indexAt(self, point):
- return self._filing.indexAt(self.rect().center(), point)
+ return self._filing.indexAt(self._cachedCenterPosition, point)
def innerRadius(self):
return self._filing.innerRadius()
def keyPressEvent(self, keyEvent):
if keyEvent.key() in [QtCore.Qt.Key_Right, QtCore.Qt.Key_Down, QtCore.Qt.Key_Tab]:
- self._select_at(self._selectionIndex + 1)
+ if self._selectionIndex != len(self._filing) - 1:
+ nextSelection = self._selectionIndex + 1
+ else:
+ nextSelection = 0
+ self._select_at(nextSelection)
self.update()
elif keyEvent.key() in [QtCore.Qt.Key_Left, QtCore.Qt.Key_Up, QtCore.Qt.Key_Backtab]:
- self._select_at(self._selectionIndex - 1)
+ if 0 < self._selectionIndex:
+ nextSelection = self._selectionIndex - 1
+ else:
+ nextSelection = len(self._filing) - 1
+ self._select_at(nextSelection)
self.update()
elif keyEvent.key() in [QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter, QtCore.Qt.Key_Space]:
self._activate_at(self._selectionIndex)
def showEvent(self, showEvent):
self.aboutToShow.emit()
+ self._cachedCenterPosition = self.rect().center()
mask = self._artist.show(self.palette())
self.setMask(mask)
def _select_at(self, index):
self._selectionIndex = index
- numChildren = len(self._filing)
- loopDelta = max(numChildren, 1)
- while self._selectionIndex < 0:
- self._selectionIndex += loopDelta
- while numChildren <= self._selectionIndex:
- self._selectionIndex -= loopDelta
-
def _update_selection(self, lastMousePos):
- radius = _radius_at(self.rect().center(), lastMousePos)
+ radius = _radius_at(self._cachedCenterPosition, lastMousePos)
if radius < self._filing.innerRadius():
self._selectionIndex = PieFiling.SELECTION_CENTER
elif radius <= self._filing.outerRadius():
mpie.insertItem(iconTextItem)
mpie.show()
- if False:
+ if True:
oneAction = QtGui.QAction(None)
oneAction.setText("Chew")
oneAction.triggered.connect(lambda: _print("Chew"))
mpie.aboutToHide.connect(lambda: _on_about_to_hide(app))
mpie.canceled.connect(lambda: _print("Canceled"))
- if True:
+ if False:
oneAction = QtGui.QAction(None)
oneAction.setText("Chew")
oneAction.triggered.connect(lambda: _print("Chew"))
projects / ejpi / commitdiff