def __init__(self, path, manager):
QtCore.QObject.__init__(self)
self.manager = manager
self.delayedChanges = []
self.path = os.path.abspath(path)
self.parentDir = None
self.lock = Mutex(QtCore.QMutex.Recursive)
self.sigproxy = SignalProxy(self.sigChanged, slot=self.delayedChange)
def __init__(self, path, manager):
QtCore.QObject.__init__(self)
self.manager = manager
self.delayedChanges = []
self.path = os.path.abspath(path)
self.parentDir = None
#self.lock = threading.RLock()
self.lock = Mutex(QtCore.QMutex.Recursive)
self.sigproxy = SignalProxy(self.sigChanged, slot=self.delayedChange)
def __init__(self, camera, module):
CameraModuleInterface.__init__(self, camera, module)
self.module = module
self.view = module.getView()
self.hasQuit = False
self.boundaryItems = {}
## setup UI
self.ui = CameraInterfaceTemplate()
self.widget = dockarea.DockArea()
w = QtGui.QWidget()
self.ui.setupUi(w)
# takes care of displaying image data,
# contrast & background subtraction user interfaces
self.imagingCtrl = ImagingCtrl()
self.frameDisplay = self.imagingCtrl.frameDisplay
## Move control panels into docks
recDock = dockarea.Dock(name="Recording",
widget=self.imagingCtrl,
size=(100, 10),
autoOrientation=False)
devDock = dockarea.Dock(name="Device Control",
widget=self.ui.devCtrlWidget,
size=(100, 10),
autoOrientation=False)
dispDock = dockarea.Dock(name="Display Control",
widget=self.frameDisplay.contrastWidget(),
size=(100, 600),
autoOrientation=False)
bgDock = dockarea.Dock(name="Background Subtraction",
widget=self.frameDisplay.backgroundWidget(),
size=(100, 10),
autoOrientation=False)
self.widget.addDock(recDock)
self.widget.addDock(devDock, 'bottom', recDock)
self.widget.addDock(dispDock, 'bottom', devDock)
self.widget.addDock(bgDock, 'bottom', dispDock)
## Camera state variables
self.cam = camera
self.roi = None
self.exposure = 0.001
self.binning = 1
self.region = None
## set up item groups
self.cameraItemGroup = pg.ItemGroup(
) ## translated with scope, scaled with camera objective
self.imageItemGroup = pg.ItemGroup(
) ## translated and scaled as each frame arrives
self.view.addItem(self.imageItemGroup)
self.view.addItem(self.cameraItemGroup)
self.cameraItemGroup.setZValue(0)
self.imageItemGroup.setZValue(-2)
## video image item
self.imageItem = self.frameDisplay.imageItem()
self.view.addItem(self.imageItem)
self.imageItem.setParentItem(self.imageItemGroup)
self.imageItem.setZValue(-10)
## open camera, determine bit depth and sensor area
self.openCamera()
## Initialize values
self.lastCameraPosition = Point(self.camSize[0] * 0.5,
self.camSize[1] * 0.5)
self.lastCameraScale = Point(1.0, 1.0)
self.scopeCenter = [self.camSize[0] * 0.5, self.camSize[1] * 0.5]
self.cameraScale = [1, 1]
## Camera region-of-interest control
self.roi = CamROI(self.camSize, parent=self.cameraItemGroup)
self.roi.sigRegionChangeFinished.connect(self.regionWidgetChanged)
self.roi.setZValue(-1)
self.setRegion()
## Set up microscope objective borders
self.borders = CameraItemGroup(self.cam)
self.module.addItem(self.borders)
self.borders.setZValue(-1)
self.cam.sigGlobalTransformChanged.connect(self.globalTransformChanged)
self.globalTransformChanged()
# initially set binning and exposure from camera state
self.exposure = self.cam.getParam('exposure')
self.binning = self.cam.getParam('binning')[0]
## Initialize values/connections in Camera Dock
self.setUiBinning(self.binning)
self.ui.spinExposure.setValue(self.exposure)
self.ui.spinExposure.setOpts(dec=True,
step=1,
minStep=100e-6,
siPrefix=True,
suffix='s',
bounds=[0, 10])
#Signals from self.ui.btnSnap and self.ui.recordStackBtn are caught by the RecordThread
self.ui.btnFullFrame.clicked.connect(lambda: self.setRegion())
self.proxy1 = SignalProxy(self.ui.binningCombo.currentIndexChanged,
slot=self.binningComboChanged)
self.ui.spinExposure.valueChanged.connect(
self.setExposure
) ## note that this signal (from acq4.util.SpinBox) is delayed.
## Signals from Camera device
self.cam.sigNewFrame.connect(self.newFrame)
self.cam.sigCameraStopped.connect(self.cameraStopped)
self.cam.sigCameraStarted.connect(self.cameraStarted)
self.cam.sigShowMessage.connect(self.showMessage)
self.frameDisplay.imageUpdated.connect(self.imageUpdated)
self.imagingCtrl.sigStartVideoClicked.connect(self.startAcquireClicked)
self.imagingCtrl.sigStopVideoClicked.connect(self.stopAcquireClicked)
self.imagingCtrl.ui.acquireFrameBtn.setEnabled(False)
class CameraInterface(CameraModuleInterface):
"""
This class provides all the functionality necessary for a camera to display
images and controls within the camera module's main window. Each camera that
connects to a camera module must implement an instance of this interface.
The interface provides a control GUI via the controlWidget() method and
directly manages its own GraphicsItems within the camera module's view box.
"""
sigNewFrame = Qt.Signal(object, object) # self, frame
def __init__(self, camera, module):
CameraModuleInterface.__init__(self, camera, module)
self.module = module
self.view = module.getView()
self.hasQuit = False
self.boundaryItems = {}
## setup UI
self.ui = CameraInterfaceTemplate()
self.widget = dockarea.DockArea()
w = Qt.QWidget()
self.ui.setupUi(w)
# takes care of displaying image data,
# contrast & background subtraction user interfaces
self.imagingCtrl = ImagingCtrl()
self.frameDisplay = self.imagingCtrl.frameDisplay
## Move control panels into docks
recDock = dockarea.Dock(name="Recording",
widget=self.imagingCtrl,
size=(100, 10),
autoOrientation=False)
devDock = dockarea.Dock(name="Device Control",
widget=self.ui.devCtrlWidget,
size=(100, 10),
autoOrientation=False)
dispDock = dockarea.Dock(name="Display Control",
widget=self.frameDisplay.contrastWidget(),
size=(100, 600),
autoOrientation=False)
bgDock = dockarea.Dock(name="Background Subtraction",
widget=self.frameDisplay.backgroundWidget(),
size=(100, 10),
autoOrientation=False)
self.widget.addDock(recDock)
self.widget.addDock(devDock, 'bottom', recDock)
self.widget.addDock(dispDock, 'bottom', devDock)
self.widget.addDock(bgDock, 'bottom', dispDock)
## Camera state variables
self.cam = camera
self.roi = None
self.exposure = 0.001
self.binning = 1
self.region = None
## set up item groups
self.cameraItemGroup = pg.ItemGroup(
) ## translated with scope, scaled with camera objective
self.imageItemGroup = pg.ItemGroup(
) ## translated and scaled as each frame arrives
self.view.addItem(self.imageItemGroup)
self.view.addItem(self.cameraItemGroup)
self.cameraItemGroup.setZValue(0)
self.imageItemGroup.setZValue(-2)
## video image item
self.imageItem = self.frameDisplay.imageItem()
self.view.addItem(self.imageItem)
self.imageItem.setParentItem(self.imageItemGroup)
self.imageItem.setZValue(-10)
## open camera, determine bit depth and sensor area
self.openCamera()
## Initialize values
self.lastCameraPosition = Point(self.camSize[0] * 0.5,
self.camSize[1] * 0.5)
self.lastCameraScale = Point(1.0, 1.0)
self.scopeCenter = [self.camSize[0] * 0.5, self.camSize[1] * 0.5]
self.cameraScale = [1, 1]
## Camera region-of-interest control
self.roi = CamROI(self.camSize, parent=self.cameraItemGroup)
self.roi.sigRegionChangeFinished.connect(self.regionWidgetChanged)
self.roi.setZValue(-1)
self.setRegion()
## Set up microscope objective borders
self.borders = CameraItemGroup(self.cam)
self.module.addItem(self.borders)
self.borders.setZValue(-1)
self.cam.sigGlobalTransformChanged.connect(self.globalTransformChanged)
self.globalTransformChanged()
# initially set binning and exposure from camera state
self.exposure = self.cam.getParam('exposure')
self.binning = self.cam.getParam('binning')[0]
## Initialize values/connections in Camera Dock
self.setUiBinning(self.binning)
self.ui.spinExposure.setValue(self.exposure)
self.ui.spinExposure.setOpts(dec=True,
step=1,
minStep=100e-6,
siPrefix=True,
suffix='s',
bounds=[0, 10])
#Signals from self.ui.btnSnap and self.ui.recordStackBtn are caught by the RecordThread
self.ui.btnFullFrame.clicked.connect(lambda: self.setRegion())
self.binningComboProxy = SignalProxy(
self.ui.binningCombo.currentIndexChanged,
slot=self.binningComboChanged)
self.ui.spinExposure.valueChanged.connect(
self.setExposure
) ## note that this signal (from acq4.util.SpinBox) is delayed.
## Signals from Camera device
self.cam.sigNewFrame.connect(self.newFrame)
self.cam.sigCameraStopped.connect(self.cameraStopped)
self.cam.sigCameraStarted.connect(self.cameraStarted)
self.cam.sigShowMessage.connect(self.showMessage)
self.cam.sigParamsChanged.connect(self.cameraParamsChanged)
self.frameDisplay.imageUpdated.connect(self.imageUpdated)
self.imagingCtrl.sigStartVideoClicked.connect(self.startAcquireClicked)
self.imagingCtrl.sigStopVideoClicked.connect(self.stopAcquireClicked)
self.imagingCtrl.ui.acquireFrameBtn.setEnabled(False)
# Hotkey signals
for action, key in self.cam.camConfig.get('hotkeys', {}).items():
if action not in ['snap', 'start']:
raise ValueError("Unknown hotkey action %r" % action)
dev = Manager.getManager().getDevice(key['device'])
dev.addKeyCallback(key['key'], self.hotkeyPressed, (action, ))
def newFrame(self, frame):
self.imagingCtrl.newFrame(frame)
self.sigNewFrame.emit(self, frame)
def controlWidget(self):
return self.widget
def openCamera(self, ind=0):
try:
self.camSize = self.cam.getParam('sensorSize')
self.showMessage("Opened camera %s" % self.cam, 5000)
self.scope = self.cam.getScopeDevice()
try:
bins = self.cam.listParams('binning')[0][0]
except:
bins = self.cam.listParams('binningX')[0]
bins.sort()
bins.reverse()
for b in bins:
self.ui.binningCombo.addItem(str(b))
except:
self.showMessage("Error opening camera")
raise
def globalTransformChanged(self,
emitter=None,
changedDev=None,
transform=None):
## scope has moved; update viewport and camera outlines.
## This is only used when the camera is not running--
## if the camera is running, then this is taken care of in drawFrame to
## ensure that the image remains stationary on screen.
if not self.cam.isRunning():
tr = pg.SRTTransform(self.cam.globalTransform())
self.updateTransform(tr)
def imageUpdated(self, frame):
## New image is displayed; update image transform
self.imageItem.setTransform(frame.frameTransform().as2D())
## Update viewport to correct for scope movement/scaling
tr = pg.SRTTransform(frame.deviceTransform())
self.updateTransform(tr)
self.imageItemGroup.setTransform(tr)
def updateTransform(self, tr):
## update view for new transform such that sensor bounds remain stationary on screen.
pos = tr.getTranslation()
scale = tr.getScale()
if scale != self.lastCameraScale:
anchor = self.view.mapViewToDevice(self.lastCameraPosition)
self.view.scaleBy(scale / self.lastCameraScale)
Qt.QApplication.processEvents()
anchor2 = self.view.mapDeviceToView(anchor)
diff = pos - anchor2
self.lastCameraScale = scale
else:
diff = pos - self.lastCameraPosition
self.view.translateBy(diff)
self.lastCameraPosition = pos
self.cameraItemGroup.setTransform(tr)
def regionWidgetChanged(self, *args):
self.updateRegion()
def updateRegion(self, autoRestart=True):
#self.clearFrameBuffer()
r = self.roi.parentBounds()
newRegion = [
int(r.left()),
int(r.top()),
int(r.width()),
int(r.height())
]
if self.region != newRegion:
self.region = newRegion
self.cam.setParam('region', self.region, autoRestart=autoRestart)
def quit(self):
self.imagingCtrl.quit()
if self.hasQuit:
return
try:
self.cam.sigNewFrame.disconnect(self.newFrame)
self.cam.sigCameraStopped.disconnect(self.cameraStopped)
self.cam.sigCameraStarted.disconnect(self.cameraStarted)
self.cam.sigShowMessage.disconnect(self.showMessage)
except TypeError:
pass
self.hasQuit = True
if self.cam.isRunning():
self.cam.stop()
if not self.cam.wait(10000):
printExc("Timed out while waiting for acq thread exit!")
def hotkeyPressed(self, device, keys, action):
callback = {
'snap': self.imagingCtrl.saveFrameClicked,
'start': self.imagingCtrl.acquireVideoClicked,
}.get(action)
callback()
def cameraStopped(self):
self.imagingCtrl.acquisitionStopped()
def cameraStarted(self):
self.imagingCtrl.acquisitionStarted()
def binningComboChanged(self, args):
self.setBinning(*args)
def setBinning(self, ind=None, autoRestart=True):
"""Set camera's binning value. If ind is specified, it is the index from binningCombo from which to grab the new binning value."""
#self.backgroundFrame = None
if ind is not None:
self.binning = int(self.ui.binningCombo.itemText(ind))
self.cam.setParam('binning', (self.binning, self.binning),
autoRestart=autoRestart)
#self.clearFrameBuffer()
###self.updateRgnLabel()
def setUiBinning(self, b, updateCamera=True):
ind = self.ui.binningCombo.findText(str(b))
if ind == -1:
raise Exception("Binning mode %s not in list." % str(b))
if updateCamera:
self.ui.binningCombo.setCurrentIndex(ind)
else:
with self.binningComboProxy.block():
self.ui.binningCombo.setCurrentIndex(ind)
def setExposure(self, e=None, autoRestart=True):
if e is not None:
self.exposure = e
self.cam.setParam('exposure', self.exposure, autoRestart=autoRestart)
def updateCameraDecorations(self):
ps = self.cameraScale
pos = self.lastCameraPosition
cs = self.camSize
if ps is None:
return
m = self.cam.globalTransform()
self.cameraItemGroup.setTransform(pg.SRTTransform(m))
def setRegion(self, rgn=None):
if rgn is None:
rgn = [0, 0, self.camSize[0] - 1, self.camSize[1] - 1]
self.roi.setPos([rgn[0], rgn[1]])
self.roi.setSize([self.camSize[0], self.camSize[1]])
def cameraParamsChanged(self, changes):
# camera parameters changed; update ui to match
if 'exposure' in changes:
with pg.SignalBlock(self.ui.spinExposure.valueChanged,
self.setExposure):
self.ui.spinExposure.setValue(changes['exposure'])
if 'binningX' in changes:
self.setUiBinning(changes['binningX'], updateCamera=False)
elif 'binning' in changes:
self.setUiBinning(changes['binning'][0], updateCamera=False)
if 'region' in changes:
with pg.SignalBlock(self.roi.sigRegionChangeFinished,
self.regionWidgetChanged):
rgn = changes['region']
self.roi.setPos([rgn[0], rgn[1]])
self.roi.setSize([rgn[2], rgn[3]])
if 'regionX' in changes or 'regionY' in changes:
with pg.SignalBlock(self.roi.sigRegionChangeFinished,
self.regionWidgetChanged):
x = changes.get('regionX', self.roi.pos().x())
y = changes.get('regionY', self.roi.pos().y())
self.roi.setPos([x, y])
if 'regionW' in changes or 'regionH' in changes:
with pg.SignalBlock(self.roi.sigRegionChangeFinished,
self.regionWidgetChanged):
w = changes.get('regionW', self.roi.state['size'][0])
h = changes.get('regionH', self.roi.state['size'][1])
self.roi.setSize([w, h])
def startAcquireClicked(self, mode):
"""User clicked the acquire video button.
"""
try:
self.cam.setParam('triggerMode', 'Normal', autoRestart=False)
self.setBinning(autoRestart=False)
self.setExposure(autoRestart=False)
self.updateRegion(autoRestart=False)
self.cam.start()
Manager.logMsg("Camera started aquisition.", importance=0)
except:
self.imagingCtrl.acquisitionStopped()
printExc("Error starting camera:")
def stopAcquireClicked(self):
self.cam.stop()
Manager.logMsg("Camera stopped acquisition.", importance=0)
def showMessage(self, msg, delay=2000):
self.module.showMessage(msg, delay)
def getImageItem(self):
return self.imageItem
def boundingRect(self):
"""
Return bounding rect of this imaging device in global coordinates
"""
return self.cam.getBoundary().boundingRect()
def takeImage(self, closeShutter=None):
# closeShutter is used for laser scanning devices; we can ignore it here.
return self.getDevice().acquireFrames(1, stack=False)
class FileHandle(QtCore.QObject):
sigChanged = QtCore.Signal(object, object, object) # (self, change, (args))
sigDelayedChange = QtCore.Signal(object, object) # (self, changes)
def __init__(self, path, manager):
QtCore.QObject.__init__(self)
self.manager = manager
self.delayedChanges = []
self.path = os.path.abspath(path)
self.parentDir = None
#self.lock = threading.RLock()
self.lock = Mutex(QtCore.QMutex.Recursive)
self.sigproxy = SignalProxy(self.sigChanged, slot=self.delayedChange)
def getFile(self, fn):
return getFileHandle(os.path.join(self.name(), fn))
def __repr__(self):
return "<%s '%s' (0x%x)>" % (self.__class__.__name__, self.name(), self.__hash__())
def __reduce__(self):
return (getHandle, (self.name(),))
def name(self, relativeTo=None):
"""Return the full name of this file with its absolute path"""
#self.checkExists()
with self.lock:
path = self.path
if relativeTo == self:
path = ''
elif relativeTo is not None:
rpath = relativeTo.name()
if not self.isGrandchildOf(relativeTo):
raise Exception("Path %s is not child of %s" % (path, rpath))
return path[len(os.path.join(rpath, '')):]
return path
def shortName(self):
"""Return the name of this file without its path"""
#self.checkExists()
return os.path.split(self.name())[1]
def ext(self):
"""Return file's extension"""
return os.path.splitext(self.name())[1]
def parent(self):
self.checkExists()
with self.lock:
if self.parentDir is None:
dirName = os.path.split(self.name())[0]
self.parentDir = self.manager.getDirHandle(dirName)
return self.parentDir
def info(self):
self.checkExists()
info = self.parent()._fileInfo(self.shortName())
return advancedTypes.ProtectedDict(info)
def setInfo(self, info=None, **args):
"""Set meta-information for this file. Updates all keys specified in info, leaving others unchanged."""
if info is None:
info = args
self.checkExists()
self.emitChanged('meta')
return self.parent()._setFileInfo(self.shortName(), info)
def isManaged(self):
self.checkExists()
return self.parent().isManaged(self.shortName())
def move(self, newDir):
self.checkExists()
with self.lock:
oldDir = self.parent()
fn1 = self.name()
name = self.shortName()
fn2 = os.path.join(newDir.name(), name)
if os.path.exists(fn2):
raise Exception("Destination file %s already exists." % fn2)
# print "<> DataManager.move: about to move %s => %s" % (fn1, fn2)
if oldDir.isManaged() and not newDir.isManaged():
raise Exception("Not moving managed file to unmanaged location--this would cause loss of meta info.")
os.rename(fn1, fn2)
# print "<> DataManager.move: moved."
self.path = fn2
self.parentDir = None
# print "<> DataManager.move: inform DM of change.."
self.manager._handleChanged(self, 'moved', fn1, fn2)
if oldDir.isManaged() and newDir.isManaged():
# print "<> DataManager.move: new parent index old info.."
newDir.indexFile(name, info=oldDir._fileInfo(name))
elif newDir.isManaged():
# print "<> DataManager.move: new parent index (no info)"
newDir.indexFile(name)
if oldDir.isManaged() and oldDir.isManaged(name):
# print "<> DataManager.move: old parent forget child.."
oldDir.forget(name)
# print "<> DataManager.move: emit 'moved'.."
self.emitChanged('moved', fn1, fn2)
# print "<> DataManager.move: oldDir emit 'children'"
oldDir._childChanged()
# print "<> DataManager.move: newDir emit 'children'"
newDir._childChanged()
def rename(self, newName):
#print "Rename %s -> %s" % (self.name(), newName)
self.checkExists()
with self.lock:
parent = self.parent()
fn1 = self.name()
oldName = self.shortName()
fn2 = os.path.join(parent.name(), newName)
if os.path.exists(fn2):
raise Exception("Destination file %s already exists." % fn2)
#print "rename", fn1, fn2
info = {}
if parent.isManaged(oldName):
info = parent._fileInfo(oldName)
parent.forget(oldName)
os.rename(fn1, fn2)
self.path = fn2
self.manager._handleChanged(self, 'renamed', fn1, fn2)
if parent.isManaged(oldName):
parent.indexFile(newName, info=info)
self.emitChanged('renamed', fn1, fn2)
self.parent()._childChanged()
def delete(self):
self.checkExists()
with self.lock:
parent = self.parent()
fn1 = self.name()
oldName = self.shortName()
if self.isFile():
os.remove(fn1)
else:
shutil.rmtree(fn1)
self.manager._handleChanged(self, 'deleted', fn1)
self.path = None
if parent.isManaged():
parent.forget(oldName)
self.emitChanged('deleted', fn1)
parent._childChanged()
def read(self, *args, **kargs):
self.checkExists()
with self.lock:
typ = self.fileType()
if typ is None:
fd = open(self.name(), 'r')
data = fd.read()
fd.close()
else:
cls = filetypes.getFileType(typ)
data = cls.read(self, *args, **kargs)
#mod = __import__('acq4.filetypes.%s' % typ, fromlist=['*'])
#func = getattr(mod, 'fromFile')
#data = func(fileName=self.name())
return data
def fileType(self):
with self.lock:
info = self.info()
## Use the recorded object_type to read the file if possible.
## Otherwise, ask the filetypes to choose the type for us.
if '__object_type__' not in info:
typ = filetypes.suggestReadType(self)
else:
typ = info['__object_type__']
return typ
def emitChanged(self, change, *args):
self.delayedChanges.append(change)
self.sigChanged.emit(self, change, args)
def delayedChange(self, args):
changes = list(set(self.delayedChanges))
self.delayedChanges = []
#self.emit(QtCore.SIGNAL('delayedChange'), self, changes)
self.sigDelayedChange.emit(self, changes)
def hasChildren(self):
self.checkExists()
return False
def _parentMoved(self, oldDir, newDir):
"""Inform this object that it has been moved as a result of its (grand)parent having moved."""
prefix = os.path.join(oldDir, '')
if self.path[:len(prefix)] != prefix:
raise Exception("File %s is not in moved tree %s, should not update!" % (self.path, oldDir))
subName = self.path[len(prefix):]
#while subName[0] == os.path.sep:
#subName = subName[1:]
newName = os.path.join(newDir, subName)
#print "===", oldDir, newDir, subName, newName
if not os.path.exists(newName):
raise Exception("File %s does not exist." % newName)
self.path = newName
self.parentDir = None
#print "parent of %s changed" % self.name()
self.emitChanged('parent')
def exists(self, name=None):
if self.path is None:
return False
if name is not None:
raise Exception("Cannot check for subpath existence on FileHandle.")
return os.path.exists(self.path)
def checkExists(self):
if not self.exists():
raise Exception("File '%s' does not exist." % self.path)
def checkDeleted(self):
if self.path is None:
raise Exception("File has been deleted.")
def isDir(self, path=None):
return False
def isFile(self):
return True
def _deleted(self):
self.path = None
def isGrandchildOf(self, grandparent):
"""Return true if this files is anywhere in the tree beneath grandparent."""
gname = os.path.join(grandparent.name(), '')
return self.name()[:len(gname)] == gname
def write(self, data, **kwargs):
self.parent().writeFile(data, self.shortName(), **kwargs)
def flushSignals(self):
"""If any delayed signals are pending, send them now."""
self.sigproxy.flush()
class FileHandle(QtCore.QObject):
sigChanged = QtCore.Signal(object, object, object) # (self, change, (args))
sigDelayedChange = QtCore.Signal(object, object) # (self, changes)
def __init__(self, path, manager):
QtCore.QObject.__init__(self)
self.manager = manager
self.delayedChanges = []
self.path = os.path.abspath(path)
self.parentDir = None
self.lock = Mutex(QtCore.QMutex.Recursive)
self.sigproxy = SignalProxy(self.sigChanged, slot=self.delayedChange)
def getFile(self, fn):
return getFileHandle(os.path.join(self.name(), fn))
def __repr__(self):
return "<%s '%s' (0x%x)>" % (self.__class__.__name__, self.name(), self.__hash__())
def __reduce__(self):
return (getHandle, (self.name(),))
def name(self, relativeTo=None):
"""Return the full name of this file with its absolute path"""
#self.checkExists()
with self.lock:
path = self.path
if relativeTo == self:
path = ''
elif relativeTo is not None:
commonParent = relativeTo
pcount = 0
while True:
if self is commonParent or self.isGrandchildOf(commonParent):
break
else:
pcount += 1
commonParent = commonParent.parent()
if commonParent is None:
raise Exception("No relative path found from %s to %s." % (relativeTo.name(), self.name()))
rpath = path[len(os.path.join(commonParent.name(), '')):]
if pcount == 0:
return rpath
else:
ppath = os.path.join(*(['..'] * pcount))
if rpath != '':
return os.path.join(ppath, rpath)
else:
return ppath
return path
def shortName(self):
"""Return the name of this file without its path"""
#self.checkExists()
return os.path.split(self.name())[1]
def ext(self):
"""Return file's extension"""
return os.path.splitext(self.name())[1]
def parent(self):
self.checkExists()
with self.lock:
if self.parentDir is None:
dirName = os.path.split(self.name())[0]
self.parentDir = self.manager.getDirHandle(dirName)
return self.parentDir
def info(self):
self.checkExists()
info = self.parent()._fileInfo(self.shortName())
return advancedTypes.ProtectedDict(info)
def setInfo(self, info=None, **args):
"""Set meta-information for this file. Updates all keys specified in info, leaving others unchanged."""
if info is None:
info = args
self.checkExists()
self.emitChanged('meta')
return self.parent()._setFileInfo(self.shortName(), info)
def isManaged(self):
self.checkExists()
return self.parent().isManaged(self.shortName())
def move(self, newDir):
self.checkExists()
with self.lock:
oldDir = self.parent()
fn1 = self.name()
name = self.shortName()
fn2 = os.path.join(newDir.name(), name)
if os.path.exists(fn2):
raise Exception("Destination file %s already exists." % fn2)
if oldDir.isManaged() and not newDir.isManaged():
raise Exception("Not moving managed file to unmanaged location--this would cause loss of meta info.")
os.rename(fn1, fn2)
self.path = fn2
self.parentDir = None
self.manager._handleChanged(self, 'moved', fn1, fn2)
if oldDir.isManaged() and newDir.isManaged():
newDir.indexFile(name, info=oldDir._fileInfo(name))
elif newDir.isManaged():
newDir.indexFile(name)
if oldDir.isManaged() and oldDir.isManaged(name):
oldDir.forget(name)
self.emitChanged('moved', fn1, fn2)
oldDir._childChanged()
newDir._childChanged()
def rename(self, newName):
"""Rename this file.
*newName* should be the new name of the file *excluding* its path.
"""
self.checkExists()
with self.lock:
parent = self.parent()
fn1 = self.name()
oldName = self.shortName()
fn2 = os.path.join(parent.name(), newName)
if os.path.exists(fn2):
raise Exception("Destination file %s already exists." % fn2)
info = {}
managed = parent.isManaged(oldName)
if managed:
info = parent._fileInfo(oldName)
parent.forget(oldName)
os.rename(fn1, fn2)
self.path = fn2
self.manager._handleChanged(self, 'renamed', fn1, fn2)
if managed:
parent.indexFile(newName, info=info)
self.emitChanged('renamed', fn1, fn2)
self.parent()._childChanged()
def delete(self):
self.checkExists()
with self.lock:
parent = self.parent()
fn1 = self.name()
oldName = self.shortName()
if parent.isManaged():
parent.forget(oldName)
if self.isFile():
os.remove(fn1)
else:
shutil.rmtree(fn1)
self.manager._handleChanged(self, 'deleted', fn1)
self.path = None
self.emitChanged('deleted', fn1)
parent._childChanged()
def read(self, *args, **kargs):
self.checkExists()
with self.lock:
typ = self.fileType()
if typ is None:
fd = open(self.name(), 'r')
data = fd.read()
fd.close()
else:
cls = filetypes.getFileType(typ)
data = cls.read(self, *args, **kargs)
return data
def fileType(self):
with self.lock:
info = self.info()
## Use the recorded object_type to read the file if possible.
## Otherwise, ask the filetypes to choose the type for us.
if '__object_type__' not in info:
typ = filetypes.suggestReadType(self)
else:
typ = info['__object_type__']
return typ
def emitChanged(self, change, *args):
self.delayedChanges.append(change)
self.sigChanged.emit(self, change, args)
def delayedChange(self, args):
changes = list(set(self.delayedChanges))
self.delayedChanges = []
self.sigDelayedChange.emit(self, changes)
def hasChildren(self):
# self.checkExists()
return False
def _parentMoved(self, oldDir, newDir):
"""Inform this object that it has been moved as a result of its (grand)parent having moved."""
prefix = os.path.join(oldDir, '')
if self.path[:len(prefix)] != prefix:
raise Exception("File %s is not in moved tree %s, should not update!" % (self.path, oldDir))
subName = self.path[len(prefix):]
newName = os.path.join(newDir, subName)
if not os.path.exists(newName):
raise Exception("File %s does not exist." % newName)
self.path = newName
self.parentDir = None
self.emitChanged('parent')
def exists(self, name=None):
if self.path is None:
return False
if name is not None:
raise Exception("Cannot check for subpath existence on FileHandle.")
return os.path.exists(self.path)
def checkExists(self):
if not self.exists():
raise Exception("File '%s' does not exist." % self.path)
def checkDeleted(self):
if self.path is None:
raise Exception("File has been deleted.")
def isDir(self, path=None):
return False
def isFile(self):
return True
def _deleted(self):
self.path = None
def isGrandchildOf(self, grandparent):
"""Return true if this files is anywhere in the tree beneath grandparent."""
gname = os.path.join(abspath(grandparent.name()), '')
return abspath(self.name())[:len(gname)] == gname
def write(self, data, **kwargs):
self.parent().writeFile(data, self.shortName(), **kwargs)
def flushSignals(self):
"""If any delayed signals are pending, send them now."""
self.sigproxy.flush()
