def __init__(self, parent, imagescene2d):
"""
Constructs a view upon a ImageScene2D
imagescene2d -- a ImgeScene2D instance
"""
QGraphicsView.__init__(self, parent)
self.setScene(imagescene2d)
self.mousePos = QPointF(0,0)
# FIXME: These int members shadow QWidget.x() and QWidget.y(), which can lead to confusion when debugging...
self.x, self.y = (0,0)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self._isRubberBandZoom = False
self._cursorBackup = None
#these attributes are exposed as public properties above
self._sliceShape = None #2D shape of this view's shown image
self._slices = None #number of slices that are stacked
self._hud = None
self._crossHairCursor = None
self._sliceIntersectionMarker = None
self._ticker = QTimer(self)
self._ticker.timeout.connect(self._tickerEvent)
#
# Setup the Viewport for fast painting
#
#With these flags turned on we could handle the drawing of the
#white background ourselves thus removing the flicker
#when scrolling fast through the slices
#self.viewport().setAttribute(Qt.WA_OpaquePaintEvent)
#self.viewport().setAttribute(Qt.WA_NoSystemBackground)
#self.viewport().setAttribute(Qt.WA_PaintOnScreen)
#self.viewport().setAutoFillBackground(False)
self.setViewportUpdateMode(QGraphicsView.MinimalViewportUpdate)
#as rescaling images is slow if done in software,
#we use Qt's built-in background caching mode so that the cached
#image need only be blitted on the screen when we only move
#the cursor
self.setCacheMode(QGraphicsView.CacheBackground)
self.setRenderHint(QPainter.Antialiasing, False)
self._crossHairCursor = CrossHairCursor(self.scene())
self._crossHairCursor.setZValue(99)
self._sliceIntersectionMarker = SliceIntersectionMarker(self.scene())
self._sliceIntersectionMarker.setZValue(100)
self._sliceIntersectionMarker.setVisibility(True)
#FIXME: this should be private, but is currently used from
# within the image scene renderer
self.tempImageItems = []
self._zoomFactor = 1.0
#for panning
self._lastPanPoint = QPoint()
self._dragMode = False
self._deltaPan = QPointF(0,0)
#FIXME: Is there are more elegant way to handle this?
self.setMouseTracking(True)
# invisible cursor to enable custom cursor
self._hiddenCursor = QCursor(Qt.BlankCursor)
class ImageView2D(QGraphicsView):
focusChanged = pyqtSignal()
"""
Shows a ImageScene2D to the user and allows for interactive
scrolling, panning, zooming etc.
"""
@property
def sliceShape(self):
"""
(width, height) of the scene.
Specifying the shape is necessary to allow for correct
scrollbars
"""
return self._sliceShape
@sliceShape.setter
def sliceShape(self, s):
self._sliceShape = s
self.scene().dataShape = s
self._crossHairCursor.dataShape = s
self._sliceIntersectionMarker.dataShape = s
@property
def hud(self):
return self._hud
@hud.setter
def hud(self, hud):
"""
Sets up a heads up display at the upper left corner of the view
hud -- a QWidget
"""
self._hud = hud
self.setLayout(QVBoxLayout())
self.layout().setContentsMargins(0,0,0,0)
self.layout().addWidget(self._hud)
self.layout().addStretch()
scene = self.scene()
hud.zoomToFitButtonClicked.connect(self.fitImage)
hud.resetZoomButtonClicked.connect(self.doScaleTo)
hud.rotLeftButtonClicked.connect(scene._onRotateLeft)
hud.rotRightButtonClicked.connect(scene._onRotateRight)
hud.swapAxesButtonClicked.connect(scene._onSwapAxes)
scene.axesChanged.connect(hud.setAxes)
def __init__(self, parent, imagescene2d):
"""
Constructs a view upon a ImageScene2D
imagescene2d -- a ImgeScene2D instance
"""
QGraphicsView.__init__(self, parent)
self.setScene(imagescene2d)
self.mousePos = QPointF(0,0)
# FIXME: These int members shadow QWidget.x() and QWidget.y(), which can lead to confusion when debugging...
self.x, self.y = (0,0)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self._isRubberBandZoom = False
self._cursorBackup = None
#these attributes are exposed as public properties above
self._sliceShape = None #2D shape of this view's shown image
self._slices = None #number of slices that are stacked
self._hud = None
self._crossHairCursor = None
self._sliceIntersectionMarker = None
self._ticker = QTimer(self)
self._ticker.timeout.connect(self._tickerEvent)
#
# Setup the Viewport for fast painting
#
#With these flags turned on we could handle the drawing of the
#white background ourselves thus removing the flicker
#when scrolling fast through the slices
#self.viewport().setAttribute(Qt.WA_OpaquePaintEvent)
#self.viewport().setAttribute(Qt.WA_NoSystemBackground)
#self.viewport().setAttribute(Qt.WA_PaintOnScreen)
#self.viewport().setAutoFillBackground(False)
self.setViewportUpdateMode(QGraphicsView.MinimalViewportUpdate)
#as rescaling images is slow if done in software,
#we use Qt's built-in background caching mode so that the cached
#image need only be blitted on the screen when we only move
#the cursor
self.setCacheMode(QGraphicsView.CacheBackground)
self.setRenderHint(QPainter.Antialiasing, False)
self._crossHairCursor = CrossHairCursor(self.scene())
self._crossHairCursor.setZValue(99)
self._sliceIntersectionMarker = SliceIntersectionMarker(self.scene())
self._sliceIntersectionMarker.setZValue(100)
self._sliceIntersectionMarker.setVisibility(True)
#FIXME: this should be private, but is currently used from
# within the image scene renderer
self.tempImageItems = []
self._zoomFactor = 1.0
#for panning
self._lastPanPoint = QPoint()
self._dragMode = False
self._deltaPan = QPointF(0,0)
#FIXME: Is there are more elegant way to handle this?
self.setMouseTracking(True)
# invisible cursor to enable custom cursor
self._hiddenCursor = QCursor(Qt.BlankCursor)
# For screen recording BlankCursor doesn't work
#self.hiddenCursor = QCursor(Qt.ArrowCursor)
def _cleanUp(self):
self._ticker.stop()
del self._ticker
def setZoomFactor(self,zoom):
if self._hud is not None:
self._hud.zoomLevelIndicator.updateLevel(zoom)
self._zoomFactor = zoom
def indicateSlicingPositionSettled(self, settled):
self.scene().indicateSlicingPositionSettled(settled)
def viewportRect(self):
"""
Return a QRectF giving the part of the scene currently displayed in this
widget's viewport in the scene's coordinates
"""
r = self.mapToScene(self.viewport().geometry()).boundingRect()
return r
def mapScene2Data(self, pos):
return self.scene().scene2data.map(pos)
def mapMouseCoordinates2Data(self, pos):
return self.mapScene2Data(self.mapToScene(pos))
def _panning(self):
hBar = self.horizontalScrollBar()
vBar = self.verticalScrollBar()
vBar.setValue(vBar.value() - self._deltaPan.y())
if self.isRightToLeft():
hBar.setValue(hBar.value() + self._deltaPan.x())
else:
hBar.setValue(hBar.value() - self._deltaPan.x())
def _deaccelerate(self, speed, a=1, maxVal=64):
x = self._qBound(-maxVal, speed.x(), maxVal)
y = self._qBound(-maxVal, speed.y(), maxVal)
ax ,ay = self._setdeaccelerateAxAy(speed.x(), speed.y(), a)
if x > 0:
x = max(0.0, x - a*ax)
elif x < 0:
x = min(0.0, x + a*ax)
if y > 0:
y = max(0.0, y - a*ay)
elif y < 0:
y = min(0.0, y + a*ay)
return QPointF(x, y)
def _qBound(self, minVal, current, maxVal):
"""PyQt4 does not wrap the qBound function from Qt's global namespace
This is equivalent."""
return max(min(current, maxVal), minVal)
def _setdeaccelerateAxAy(self, x, y, a):
x = abs(x)
y = abs(y)
if x > y:
if y > 0:
ax = int(x / y)
if ax != 0:
return ax, 1
else:
return x/a, 1
if y > x:
if x > 0:
ay = int(y/x)
if ay != 0:
return 1, ay
else:
return 1, y/a
return 1, 1
def _tickerEvent(self):
if self._deltaPan.x() == 0.0 and self._deltaPan.y() == 0.0 or self._dragMode == True:
self._ticker.stop()
else:
self._deltaPan = self._deaccelerate(self._deltaPan)
self._panning()
def zoomOut(self):
self.doScale(0.9)
def zoomIn(self):
self.doScale(1.1)
def fitImage(self):
self.fitInView(self.sceneRect(), Qt.KeepAspectRatio)
width, height = self.size().width() / self.sceneRect().width(), self.height() / self.sceneRect().height()
self.setZoomFactor(min(width, height))
def centerImage(self):
self.centerOn(self.sceneRect().width()/2 + self.sceneRect().x(), self.sceneRect().height()/2 + self.sceneRect().y())
def toggleHud(self):
if self._hud is not None:
self._hud.setVisible(not self._hud.isVisible())
def setHudVisible(self, visible):
if self._hud is not None:
self._hud.setVisible(visible)
def hudVisible(self):
return self._hud.isVisible()
def focusInEvent(self, event):
self.setStyleSheet(".QFrame {border: 2px solid white; border-radius: 4px;}")
self.focusChanged.emit()
def focusOutEvent(self, event):
self.setStyleSheet(".QFrame {}")
def changeViewPort(self,qRectf):
self.fitInView(qRectf,mode = Qt.KeepAspectRatio)
width, height = self.size().width() / qRectf.width(), self.height() / qRectf.height()
self.setZoomFactor(min(width, height))
def doScale(self, factor):
self.setZoomFactor(self._zoomFactor * factor)
self.scale(factor, factor)
def doScaleTo(self, zoom=1):
factor = ( 1 / self._zoomFactor ) * zoom
self.setZoomFactor(zoom)
self.scale(factor, factor)
def __init__(self, parent, imagescene2d):
"""
Constructs a view upon a ImageScene2D
imagescene2d -- a ImgeScene2D instance
"""
QGraphicsView.__init__(self, parent)
self.setScene(imagescene2d)
self.mousePos = QPointF(0, 0)
# FIXME: These int members shadow QWidget.x() and QWidget.y(), which can lead to confusion when debugging...
self.x, self.y = (0, 0)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self._isRubberBandZoom = False
self._cursorBackup = None
#these attributes are exposed as public properties above
self._sliceShape = None #2D shape of this view's shown image
self._slices = None #number of slices that are stacked
self._hud = None
self._crossHairCursor = None
self._sliceIntersectionMarker = None
self._ticker = QTimer(self)
self._ticker.timeout.connect(self._tickerEvent)
#
# Setup the Viewport for fast painting
#
#With these flags turned on we could handle the drawing of the
#white background ourselves thus removing the flicker
#when scrolling fast through the slices
#self.viewport().setAttribute(Qt.WA_OpaquePaintEvent)
#self.viewport().setAttribute(Qt.WA_NoSystemBackground)
#self.viewport().setAttribute(Qt.WA_PaintOnScreen)
#self.viewport().setAutoFillBackground(False)
self.setViewportUpdateMode(QGraphicsView.MinimalViewportUpdate)
#as rescaling images is slow if done in software,
#we use Qt's built-in background caching mode so that the cached
#image need only be blitted on the screen when we only move
#the cursor
self.setCacheMode(QGraphicsView.CacheBackground)
self.setRenderHint(QPainter.Antialiasing, False)
self._crossHairCursor = CrossHairCursor(self.scene())
self._crossHairCursor.setZValue(99)
self._sliceIntersectionMarker = SliceIntersectionMarker(self.scene())
self._sliceIntersectionMarker.setZValue(100)
self._sliceIntersectionMarker.setVisibility(True)
#FIXME: this should be private, but is currently used from
# within the image scene renderer
self.tempImageItems = []
self._zoomFactor = 1.0
#for panning
self._lastPanPoint = QPoint()
self._dragMode = False
self._deltaPan = QPointF(0, 0)
#FIXME: Is there are more elegant way to handle this?
self.setMouseTracking(True)
# invisible cursor to enable custom cursor
self._hiddenCursor = QCursor(Qt.BlankCursor)
class ImageView2D(QGraphicsView):
focusChanged = pyqtSignal()
"""
Shows a ImageScene2D to the user and allows for interactive
scrolling, panning, zooming etc.
"""
@property
def sliceShape(self):
"""
(width, height) of the scene.
Specifying the shape is necessary to allow for correct
scrollbars
"""
return self._sliceShape
@sliceShape.setter
def sliceShape(self, s):
self._sliceShape = s
self.scene().dataShape = s
self._crossHairCursor.dataShape = s
self._sliceIntersectionMarker.dataShape = s
@property
def hud(self):
return self._hud
@hud.setter
def hud(self, hud):
"""
Sets up a heads up display at the upper left corner of the view
hud -- a QWidget
"""
self._hud = hud
self.setLayout(QVBoxLayout())
self.layout().setContentsMargins(0, 0, 0, 0)
self.layout().addWidget(self._hud)
self.layout().addStretch()
scene = self.scene()
hud.zoomToFitButtonClicked.connect(self.fitImage)
hud.resetZoomButtonClicked.connect(self.doScaleTo)
hud.rotLeftButtonClicked.connect(scene._onRotateLeft)
hud.rotRightButtonClicked.connect(scene._onRotateRight)
hud.swapAxesButtonClicked.connect(scene._onSwapAxes)
scene.axesChanged.connect(hud.setAxes)
def __init__(self, parent, imagescene2d):
"""
Constructs a view upon a ImageScene2D
imagescene2d -- a ImgeScene2D instance
"""
QGraphicsView.__init__(self, parent)
self.setScene(imagescene2d)
self.mousePos = QPointF(0, 0)
# FIXME: These int members shadow QWidget.x() and QWidget.y(), which can lead to confusion when debugging...
self.x, self.y = (0, 0)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self._isRubberBandZoom = False
self._cursorBackup = None
#these attributes are exposed as public properties above
self._sliceShape = None #2D shape of this view's shown image
self._slices = None #number of slices that are stacked
self._hud = None
self._crossHairCursor = None
self._sliceIntersectionMarker = None
self._ticker = QTimer(self)
self._ticker.timeout.connect(self._tickerEvent)
#
# Setup the Viewport for fast painting
#
#With these flags turned on we could handle the drawing of the
#white background ourselves thus removing the flicker
#when scrolling fast through the slices
#self.viewport().setAttribute(Qt.WA_OpaquePaintEvent)
#self.viewport().setAttribute(Qt.WA_NoSystemBackground)
#self.viewport().setAttribute(Qt.WA_PaintOnScreen)
#self.viewport().setAutoFillBackground(False)
self.setViewportUpdateMode(QGraphicsView.MinimalViewportUpdate)
#as rescaling images is slow if done in software,
#we use Qt's built-in background caching mode so that the cached
#image need only be blitted on the screen when we only move
#the cursor
self.setCacheMode(QGraphicsView.CacheBackground)
self.setRenderHint(QPainter.Antialiasing, False)
self._crossHairCursor = CrossHairCursor(self.scene())
self._crossHairCursor.setZValue(99)
self._sliceIntersectionMarker = SliceIntersectionMarker(self.scene())
self._sliceIntersectionMarker.setZValue(100)
self._sliceIntersectionMarker.setVisibility(True)
#FIXME: this should be private, but is currently used from
# within the image scene renderer
self.tempImageItems = []
self._zoomFactor = 1.0
#for panning
self._lastPanPoint = QPoint()
self._dragMode = False
self._deltaPan = QPointF(0, 0)
#FIXME: Is there are more elegant way to handle this?
self.setMouseTracking(True)
# invisible cursor to enable custom cursor
self._hiddenCursor = QCursor(Qt.BlankCursor)
# For screen recording BlankCursor doesn't work
#self.hiddenCursor = QCursor(Qt.ArrowCursor)
def _cleanUp(self):
self._ticker.stop()
del self._ticker
def setZoomFactor(self, zoom):
if self._hud is not None:
self._hud.zoomLevelIndicator.updateLevel(zoom)
self._zoomFactor = zoom
def indicateSlicingPositionSettled(self, settled):
self.scene().indicateSlicingPositionSettled(settled)
def viewportRect(self):
"""
Return a QRectF giving the part of the scene currently displayed in this
widget's viewport in the scene's coordinates
"""
r = self.mapToScene(self.viewport().geometry()).boundingRect()
return r
def mapScene2Data(self, pos):
return self.scene().scene2data.map(pos)
def mapMouseCoordinates2Data(self, pos):
return self.mapScene2Data(self.mapToScene(pos))
def _panning(self):
hBar = self.horizontalScrollBar()
vBar = self.verticalScrollBar()
vBar.setValue(vBar.value() - self._deltaPan.y())
if self.isRightToLeft():
hBar.setValue(hBar.value() + self._deltaPan.x())
else:
hBar.setValue(hBar.value() - self._deltaPan.x())
def _deaccelerate(self, speed, a=1, maxVal=64):
x = self._qBound(-maxVal, speed.x(), maxVal)
y = self._qBound(-maxVal, speed.y(), maxVal)
ax, ay = self._setdeaccelerateAxAy(speed.x(), speed.y(), a)
if x > 0:
x = max(0.0, x - a * ax)
elif x < 0:
x = min(0.0, x + a * ax)
if y > 0:
y = max(0.0, y - a * ay)
elif y < 0:
y = min(0.0, y + a * ay)
return QPointF(x, y)
def _qBound(self, minVal, current, maxVal):
"""PyQt4 does not wrap the qBound function from Qt's global namespace
This is equivalent."""
return max(min(current, maxVal), minVal)
def _setdeaccelerateAxAy(self, x, y, a):
x = abs(x)
y = abs(y)
if x > y:
if y > 0:
ax = int(x / y)
if ax != 0:
return ax, 1
else:
return x / a, 1
if y > x:
if x > 0:
ay = int(y / x)
if ay != 0:
return 1, ay
else:
return 1, y / a
return 1, 1
def _tickerEvent(self):
if self._deltaPan.x() == 0.0 and self._deltaPan.y(
) == 0.0 or self._dragMode == True:
self._ticker.stop()
else:
self._deltaPan = self._deaccelerate(self._deltaPan)
self._panning()
def zoomOut(self):
self.doScale(0.9)
def zoomIn(self):
self.doScale(1.1)
def fitImage(self):
self.fitInView(self.sceneRect(), Qt.KeepAspectRatio)
width, height = self.size().width() / self.sceneRect().width(
), self.height() / self.sceneRect().height()
self.setZoomFactor(min(width, height))
def centerImage(self):
self.centerOn(self.sceneRect().width() / 2 + self.sceneRect().x(),
self.sceneRect().height() / 2 + self.sceneRect().y())
def toggleHud(self):
if self._hud is not None:
self._hud.setVisible(not self._hud.isVisible())
def setHudVisible(self, visible):
if self._hud is not None:
self._hud.setVisible(visible)
def hudVisible(self):
return self._hud.isVisible()
def focusInEvent(self, event):
self.setStyleSheet(
".QFrame {border: 2px solid white; border-radius: 4px;}")
self.focusChanged.emit()
def focusOutEvent(self, event):
self.setStyleSheet(".QFrame {}")
def changeViewPort(self, qRectf):
self.fitInView(qRectf, mode=Qt.KeepAspectRatio)
width, height = self.size().width() / qRectf.width(), self.height(
) / qRectf.height()
self.setZoomFactor(min(width, height))
def doScale(self, factor):
self.setZoomFactor(self._zoomFactor * factor)
self.scale(factor, factor)
def doScaleTo(self, zoom=1):
factor = (1 / self._zoomFactor) * zoom
self.setZoomFactor(zoom)
self.scale(factor, factor)
class ImageView2D(QGraphicsView):
"""
Shows a ImageScene2D to the user and allows for interactive
scrolling, panning, zooming etc. It intercepts all meaningful
events on the widget for further interpretation (e.g. the view
does not know which slicing axis it represents in the 3D slice
viewer setting).
"""
#notifies about the relative change in the slicing position
#that is requested
changeSliceDelta = pyqtSignal(int)
drawing = pyqtSignal(QPointF)
beginDraw = pyqtSignal(QPointF, object)
endDraw = pyqtSignal(QPointF)
erasingToggled = pyqtSignal(bool)
#notifies that the mouse has moved to 2D coordinate x,y
mouseMoved = pyqtSignal(int, int)
#notifies that the user has double clicked on the 2D coordinate x,y
mouseDoubleClicked = pyqtSignal(int, int)
drawUpdateInterval = 300 #ms
@property
def shape(self):
"""
(width, height) of the scene.
Specifying the shape is necessary to allow for correct
scrollbars
"""
return self._shape
@shape.setter
def shape(self, s):
self._shape = s
self.scene().shape = s
self._crossHairCursor.shape = (s[1], s[0])
self._sliceIntersectionMarker.shape = (s[1], s[0])
#FIXME unused?
@property
def name(self):
return self._name
@name.setter
def name(self, n):
self._name = n
@property
def hud(self):
return self._hud
@hud.setter
def hud(self, hud):
"""
Sets up a heads up display at the upper left corner of the view
hud -- a QWidget
"""
self._hud = hud
self.setLayout(QVBoxLayout())
self.layout().setContentsMargins(0,0,0,0)
self.layout().addWidget(self._hud)
self.layout().addStretch()
@property
def drawingEnabled(self):
return self._drawingEnabled
@drawingEnabled.setter
def drawingEnabled(self, enable):
self._drawingEnabled = enable
def __init__(self, imagescene2d, useGL=False):
"""
Constructs a view upon a ImageScene2D
imagescene2d -- a ImgeScene2D instance
useGL -- wether to enable OpenGL rendering
"""
QGraphicsView.__init__(self)
self._useGL = useGL
self.setScene(imagescene2d)
#these attributes are exposed as public properties above
self._shape = None #2D shape of this view's shown image
self._slices = None #number of slices that are stacked
self._name = ''
self._hud = None
self._drawingEnabled = False
self._crossHairCursor = None
self._sliceIntersectionMarker = None
#
# Setup the Viewport for fast painting
#
if self._useGL:
self.openglWidget = QGLWidget(self)
self.setViewport(self.openglWidget)
#we clear the background ourselves
self.viewport().setAutoFillBackground(False)
#QGraphicsView cannot use partial updates when using
#an OpenGL widget as a viewport
#http://doc.qt.nokia.com/qq/qq26-openglcanvas.html
self.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
else:
#Unfortunately, setting these flags has no effect when
#Cache background is turned on.
#With these flags turned on we could handle the drawing of the
#white background ourselves thus removing the flicker
#when scrolling fast through the slices
#self.viewport().setAttribute(Qt.WA_OpaquePaintEvent)
#self.viewport().setAttribute(Qt.WA_NoSystemBackground)
#self.viewport().setAttribute(Qt.WA_PaintOnScreen)
#self.viewport().setAutoFillBackground(False)
self.setViewportUpdateMode(QGraphicsView.MinimalViewportUpdate)
#as rescaling images is slow if done in software,
#we use Qt's built-in background caching mode so that the cached
#image need only be blitted on the screen when we only move
#the cursor
self.setCacheMode(QGraphicsView.CacheBackground)
self.setRenderHint(QPainter.Antialiasing, False)
#Intitialize the scene
if self._useGL:
self.scene().activateOpenGL( self.openglWidget )
self._crossHairCursor = CrossHairCursor(self.scene())
self._crossHairCursor.setZValue(99)
self._sliceIntersectionMarker = SliceIntersectionMarker()
self._sliceIntersectionMarker.setZValue(100)
self.scene().addItem(self._sliceIntersectionMarker)
#FIXME: Use a QAction here so that we do not have to synchronize
#between this initial state and the toggle button's initial state
self._sliceIntersectionMarker.setVisibility(True)
#FIXME: this should be private, but is currently used from
# within the image scene renderer
self.tempImageItems = []
self._isDrawing = False
self._zoomFactor = 1.0
#for panning
self._lastPanPoint = QPoint()
self._dragMode = False
self._deltaPan = QPointF(0,0)
#Unfortunately, setting the style like this make the scroll bars look
#really crappy...
#self.setStyleSheet("QWidget:!focus { border: 2px solid " + self._axisColor[self._axis].name() +"; border-radius: 4px; }\
# QWidget:focus { border: 2px solid white; border-radius: 4px; }")
#FIXME: Is there are more elegant way to handle this?
self.setMouseTracking(True)
self._ticker = QTimer(self)
self._ticker.timeout.connect(self._tickerEvent)
#label updates while drawing, needed for interactive segmentation
self._drawTimer = QTimer(self)
self._drawTimer.timeout.connect(self.notifyDrawing)
# invisible cursor to enable custom cursor
self._hiddenCursor = QCursor(Qt.BlankCursor)
# For screen recording BlankCursor doesn't work
#self.hiddenCursor = QCursor(Qt.ArrowCursor)
self._tempErase = False
def swapAxes(self):
"""
Displays this image as if the x and y axes were swapped.
"""
#FIXME: This is needed for the current arrangements of the three
# 3D slice views. Can this be made more elegant
self.rotate(90.0)
self.scale(1.0,-1.0)
def _cleanUp(self):
self._ticker.stop()
self._drawTimer.stop()
del self._drawTimer
del self._ticker
def viewportRect(self):
"""
Return a QRectF giving the part of the scene currently displayed in this
widget's viewport in the scene's coordinates
"""
return self.mapToScene(self.viewport().geometry()).boundingRect()
def saveSlice(self, filename):
"""Legacy code."""
#print "Saving in ", filename, "slice #", self.sliceNumber, "axis", self._axis
result_image = QImage(self.scene().image.size(), self.scene().image.format())
p = QPainter(result_image)
for patchNr in range(self.patchAccessor.patchCount):
bounds = self.patchAccessor.getPatchBounds(patchNr)
if self.openglWidget is None:
p.drawImage(0, 0, self.scene().image)
else:
p.drawImage(bounds[0], bounds[2], self.imagePatches[patchNr])
p.end()
#horrible way to transpose an image. but it works.
transform = QTransform()
transform.rotate(90)
result_image = result_image.mirrored()
result_image = result_image.transformed(transform)
result_image.save(QString(filename))
def notifyDrawing(self):
print "ImageView2D.notifyDrawing"
#FIXME: resurrect
self.drawing.emit(self.mousePos)
def beginDrawing(self, pos):
self.mousePos = pos
self._isDrawing = True
self.beginDraw.emit(pos, self.shape)
def endDrawing(self, pos):
InteractionLogger.log("%f: endDrawing()" % (time.clock()))
self._drawTimer.stop()
self._isDrawing = False
self.endDraw.emit(pos)
def wheelEvent(self, event):
keys = QApplication.keyboardModifiers()
k_alt = (keys == Qt.AltModifier)
k_ctrl = (keys == Qt.ControlModifier)
self.mousePos = self.mapToScene(event.pos())
grviewCenter = self.mapToScene(self.viewport().rect().center())
if event.delta() > 0:
if k_alt:
self.changeSlice(10)
elif k_ctrl:
scaleFactor = 1.1
self.doScale(scaleFactor)
else:
self.changeSlice(1)
else:
if k_alt:
self.changeSlice(-10)
elif k_ctrl:
scaleFactor = 0.9
self.doScale(scaleFactor)
else:
self.changeSlice(-1)
if k_ctrl:
mousePosAfterScale = self.mapToScene(event.pos())
offset = self.mousePos - mousePosAfterScale
newGrviewCenter = grviewCenter + offset
self.centerOn(newGrviewCenter)
self.mouseMoveEvent(event)
def mousePressEvent(self, event):
if event.button() == Qt.MidButton:
self.setCursor(QCursor(Qt.SizeAllCursor))
self._lastPanPoint = event.pos()
self._crossHairCursor.setVisible(False)
self._dragMode = True
if self._ticker.isActive():
self._deltaPan = QPointF(0, 0)
if event.buttons() == Qt.RightButton:
#make sure that we have the cursor at the correct position
#before we call the context menu
self.mouseMoveEvent(event)
self.customContextMenuRequested.emit(event.pos())
return
if not self.drawingEnabled:
print "ImageView2D.mousePressEvent: drawing is not enabled"
return
if event.buttons() == Qt.LeftButton:
#don't draw if flicker the view
if self._ticker.isActive():
return
if QApplication.keyboardModifiers() == Qt.ShiftModifier:
self.erasingToggled.emit(True)
self._tempErase = True
mousePos = self.mapToScene(event.pos())
self.beginDrawing(mousePos)
def mouseMoveEvent(self,event):
if self._dragMode == True:
#the mouse was moved because the user wants to change
#the viewport
self._deltaPan = QPointF(event.pos() - self._lastPanPoint)
self._panning()
self._lastPanPoint = event.pos()
return
if self._ticker.isActive():
#the view is still scrolling
#do nothing until it comes to a complete stop
return
self.mousePos = mousePos = self.mapToScene(event.pos())
x = self.x = mousePos.x()
y = self.y = mousePos.y()
self.mouseMoved.emit(x,y)
if self._isDrawing:
self.drawing.emit(mousePos)
def mouseReleaseEvent(self, event):
if event.button() == Qt.MidButton:
self.setCursor(QCursor())
releasePoint = event.pos()
self._lastPanPoint = releasePoint
self._dragMode = False
self._ticker.start(20)
if self._isDrawing:
mousePos = self.mapToScene(event.pos())
self.endDrawing(mousePos)
if self._tempErase:
self.erasingToggled.emit(False)
self._tempErase = False
def _panning(self):
hBar = self.horizontalScrollBar()
vBar = self.verticalScrollBar()
vBar.setValue(vBar.value() - self._deltaPan.y())
if self.isRightToLeft():
hBar.setValue(hBar.value() + self._deltaPan.x())
else:
hBar.setValue(hBar.value() - self._deltaPan.x())
def _deaccelerate(self, speed, a=1, maxVal=64):
x = self._qBound(-maxVal, speed.x(), maxVal)
y = self._qBound(-maxVal, speed.y(), maxVal)
ax ,ay = self._setdeaccelerateAxAy(speed.x(), speed.y(), a)
if x > 0:
x = max(0.0, x - a*ax)
elif x < 0:
x = min(0.0, x + a*ax)
if y > 0:
y = max(0.0, y - a*ay)
elif y < 0:
y = min(0.0, y + a*ay)
return QPointF(x, y)
def _qBound(self, minVal, current, maxVal):
"""PyQt4 does not wrap the qBound function from Qt's global namespace
This is equivalent."""
return max(min(current, maxVal), minVal)
def _setdeaccelerateAxAy(self, x, y, a):
x = abs(x)
y = abs(y)
if x > y:
if y > 0:
ax = int(x / y)
if ax != 0:
return ax, 1
else:
return x/a, 1
if y > x:
if x > 0:
ay = int(y/x)
if ay != 0:
return 1, ay
else:
return 1, y/a
return 1, 1
def _tickerEvent(self):
if self._deltaPan.x() == 0.0 and self._deltaPan.y() == 0.0 or self._dragMode == True:
self._ticker.stop()
else:
self._deltaPan = self._deaccelerate(self._deltaPan)
self._panning()
def mouseDoubleClickEvent(self, event):
mousePos = self.mapToScene(event.pos())
self.mouseDoubleClicked.emit(mousePos.x(), mousePos.y())
def changeSlice(self, delta):
if self._isDrawing:
self.endDrawing(self.mousePos)
self._isDrawing = True
#FIXME:
#self._drawManager.beginDrawing(self.mousePos, self.self.shape2D)
self.changeSliceDelta.emit(delta)
#FIXME resurrect
#InteractionLogger.log("%f: changeSliceDelta(axis, num) %d, %d" % (time.clock(), self._axis, delta))
def zoomOut(self):
self.doScale(0.9)
def zoomIn(self):
self.doScale(1.1)
def changeViewPort(self,qRectf):
self.fitInView(qRectf,mode = Qt.KeepAspectRatio)
def doScale(self, factor):
self._zoomFactor = self._zoomFactor * factor
InteractionLogger.log("%f: zoomFactor(factor) %f" % (time.clock(), self._zoomFactor))
self.scale(factor, factor)
def __init__(self, imagescene2d, useGL=False):
"""
Constructs a view upon a ImageScene2D
imagescene2d -- a ImgeScene2D instance
useGL -- wether to enable OpenGL rendering
"""
QGraphicsView.__init__(self)
self._useGL = useGL
self.setScene(imagescene2d)
#these attributes are exposed as public properties above
self._shape = None #2D shape of this view's shown image
self._slices = None #number of slices that are stacked
self._name = ''
self._hud = None
self._drawingEnabled = False
self._crossHairCursor = None
self._sliceIntersectionMarker = None
#
# Setup the Viewport for fast painting
#
if self._useGL:
self.openglWidget = QGLWidget(self)
self.setViewport(self.openglWidget)
#we clear the background ourselves
self.viewport().setAutoFillBackground(False)
#QGraphicsView cannot use partial updates when using
#an OpenGL widget as a viewport
#http://doc.qt.nokia.com/qq/qq26-openglcanvas.html
self.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
else:
#Unfortunately, setting these flags has no effect when
#Cache background is turned on.
#With these flags turned on we could handle the drawing of the
#white background ourselves thus removing the flicker
#when scrolling fast through the slices
#self.viewport().setAttribute(Qt.WA_OpaquePaintEvent)
#self.viewport().setAttribute(Qt.WA_NoSystemBackground)
#self.viewport().setAttribute(Qt.WA_PaintOnScreen)
#self.viewport().setAutoFillBackground(False)
self.setViewportUpdateMode(QGraphicsView.MinimalViewportUpdate)
#as rescaling images is slow if done in software,
#we use Qt's built-in background caching mode so that the cached
#image need only be blitted on the screen when we only move
#the cursor
self.setCacheMode(QGraphicsView.CacheBackground)
self.setRenderHint(QPainter.Antialiasing, False)
#Intitialize the scene
if self._useGL:
self.scene().activateOpenGL( self.openglWidget )
self._crossHairCursor = CrossHairCursor(self.scene())
self._crossHairCursor.setZValue(99)
self._sliceIntersectionMarker = SliceIntersectionMarker()
self._sliceIntersectionMarker.setZValue(100)
self.scene().addItem(self._sliceIntersectionMarker)
#FIXME: Use a QAction here so that we do not have to synchronize
#between this initial state and the toggle button's initial state
self._sliceIntersectionMarker.setVisibility(True)
#FIXME: this should be private, but is currently used from
# within the image scene renderer
self.tempImageItems = []
self._isDrawing = False
self._zoomFactor = 1.0
#for panning
self._lastPanPoint = QPoint()
self._dragMode = False
self._deltaPan = QPointF(0,0)
#Unfortunately, setting the style like this make the scroll bars look
#really crappy...
#self.setStyleSheet("QWidget:!focus { border: 2px solid " + self._axisColor[self._axis].name() +"; border-radius: 4px; }\
# QWidget:focus { border: 2px solid white; border-radius: 4px; }")
#FIXME: Is there are more elegant way to handle this?
self.setMouseTracking(True)
self._ticker = QTimer(self)
self._ticker.timeout.connect(self._tickerEvent)
#label updates while drawing, needed for interactive segmentation
self._drawTimer = QTimer(self)
self._drawTimer.timeout.connect(self.notifyDrawing)
# invisible cursor to enable custom cursor
self._hiddenCursor = QCursor(Qt.BlankCursor)
# For screen recording BlankCursor doesn't work
#self.hiddenCursor = QCursor(Qt.ArrowCursor)
self._tempErase = False