__all__ = ["CanvasItem", "GroupCanvasItem"] import importlib from .. import ItemGroup, SRTTransform, debug from .. import functions as fn from ..graphicsItems.ROI import ROI from ..Qt import QT_LIB, QtCore, QtWidgets from . import TransformGuiTemplate_generic as ui_template translate = QtCore.QCoreApplication.translate class SelectBox(ROI): def __init__(self, scalable=False, rotatable=True): #QtWidgets.QGraphicsRectItem.__init__(self, 0, 0, size[0], size[1]) ROI.__init__(self, [0,0], [1,1], invertible=True) center = [0.5, 0.5] if scalable: self.addScaleHandle([1, 1], center, lockAspect=True) self.addScaleHandle([0, 0], center, lockAspect=True) if rotatable: self.addRotateHandle([0, 1], center) self.addRotateHandle([1, 0], center) class CanvasItem(QtCore.QObject): sigResetUserTransform = QtCore.Signal(object) sigTransformChangeFinished = QtCore.Signal(object) sigTransformChanged = QtCore.Signal(object) """CanvasItem takes care of managing an item's state--alpha, visibility, z-value, transformations, etc. and provides a control widget""" sigVisibilityChanged = QtCore.Signal(object) transformCopyBuffer = None def __init__(self, item, **opts): defOpts = {'name': None, 'z': None, 'movable': True, 'scalable': False, 'rotatable': True, 'visible': True, 'parent':None} #'pos': [0,0], 'scale': [1,1], 'angle':0, defOpts.update(opts) self.opts = defOpts self.selectedAlone = False ## whether this item is the only one selected QtCore.QObject.__init__(self) self.canvas = None self._graphicsItem = item parent = self.opts['parent'] if parent is not None: self._graphicsItem.setParentItem(parent.graphicsItem()) self._parentItem = parent else: self._parentItem = None z = self.opts['z'] if z is not None: item.setZValue(z) self.ctrl = QtWidgets.QWidget() self.layout = QtWidgets.QGridLayout() self.layout.setSpacing(0) self.layout.setContentsMargins(0,0,0,0) self.ctrl.setLayout(self.layout) self.alphaLabel = QtWidgets.QLabel(translate("CanvasItem", "Alpha")) self.alphaSlider = QtWidgets.QSlider() self.alphaSlider.setMaximum(1023) self.alphaSlider.setOrientation(QtCore.Qt.Orientation.Horizontal) self.alphaSlider.setValue(1023) self.layout.addWidget(self.alphaLabel, 0, 0) self.layout.addWidget(self.alphaSlider, 0, 1) self.resetTransformBtn = QtWidgets.QPushButton('Reset Transform') self.copyBtn = QtWidgets.QPushButton('Copy') self.pasteBtn = QtWidgets.QPushButton('Paste') self.transformWidget = QtWidgets.QWidget() self.transformGui = ui_template.Ui_Form() self.transformGui.setupUi(self.transformWidget) self.layout.addWidget(self.transformWidget, 3, 0, 1, 2) self.transformGui.mirrorImageBtn.clicked.connect(self.mirrorY) self.transformGui.reflectImageBtn.clicked.connect(self.mirrorXY) self.layout.addWidget(self.resetTransformBtn, 1, 0, 1, 2) self.layout.addWidget(self.copyBtn, 2, 0, 1, 1) self.layout.addWidget(self.pasteBtn, 2, 1, 1, 1) self.alphaSlider.valueChanged.connect(self.alphaChanged) self.alphaSlider.sliderPressed.connect(self.alphaPressed) self.alphaSlider.sliderReleased.connect(self.alphaReleased) self.resetTransformBtn.clicked.connect(self.resetTransformClicked) self.copyBtn.clicked.connect(self.copyClicked) self.pasteBtn.clicked.connect(self.pasteClicked) self.setMovable(self.opts['movable']) ## update gui to reflect this option if 'transform' in self.opts: self.baseTransform = self.opts['transform'] else: self.baseTransform = SRTTransform() if 'pos' in self.opts and self.opts['pos'] is not None: self.baseTransform.translate(self.opts['pos']) if 'angle' in self.opts and self.opts['angle'] is not None: self.baseTransform.rotate(self.opts['angle']) if 'scale' in self.opts and self.opts['scale'] is not None: self.baseTransform.scale(self.opts['scale']) ## create selection box (only visible when selected) tr = self.baseTransform.saveState() if 'scalable' not in opts and tr['scale'] == (1,1): self.opts['scalable'] = True ## every CanvasItem implements its own individual selection box ## so that subclasses are free to make their own. self.selectBox = SelectBox(scalable=self.opts['scalable'], rotatable=self.opts['rotatable']) self.selectBox.hide() self.selectBox.setZValue(1e6) self.selectBox.sigRegionChanged.connect(self.selectBoxChanged) ## calls selectBoxMoved self.selectBox.sigRegionChangeFinished.connect(self.selectBoxChangeFinished) ## set up the transformations that will be applied to the item ## (It is not safe to use item.setTransform, since the item might count on that not changing) self.itemRotation = QtWidgets.QGraphicsRotation() self.itemScale = QtWidgets.QGraphicsScale() self._graphicsItem.setTransformations([self.itemRotation, self.itemScale]) self.tempTransform = SRTTransform() ## holds the additional transform that happens during a move - gets added to the userTransform when move is done. self.userTransform = SRTTransform() ## stores the total transform of the object self.resetUserTransform() def setMovable(self, m): self.opts['movable'] = m if m: self.resetTransformBtn.show() self.copyBtn.show() self.pasteBtn.show() else: self.resetTransformBtn.hide() self.copyBtn.hide() self.pasteBtn.hide() def setCanvas(self, canvas): ## Called by canvas whenever the item is added. ## It is our responsibility to add all graphicsItems to the canvas's scene ## The canvas will automatically add our graphicsitem, ## so we just need to take care of the selectbox. if canvas is self.canvas: return if canvas is None: self.canvas.removeFromScene(self._graphicsItem) self.canvas.removeFromScene(self.selectBox) else: canvas.addToScene(self._graphicsItem) canvas.addToScene(self.selectBox) self.canvas = canvas def graphicsItem(self): """Return the graphicsItem for this canvasItem.""" return self._graphicsItem def parentItem(self): return self._parentItem def setParentItem(self, parent): self._parentItem = parent if parent is not None: if isinstance(parent, CanvasItem): parent = parent.graphicsItem() self.graphicsItem().setParentItem(parent) #def name(self): #return self.opts['name'] def copyClicked(self): CanvasItem.transformCopyBuffer = self.saveTransform() def pasteClicked(self): t = CanvasItem.transformCopyBuffer if t is None: return else: self.restoreTransform(t) def mirrorY(self): if not self.isMovable(): return #flip = self.transformGui.mirrorImageCheck.isChecked() #tr = self.userTransform.saveState() inv = SRTTransform() inv.scale(-1, 1) self.userTransform = self.userTransform * inv self.updateTransform() self.selectBoxFromUser() self.sigTransformChangeFinished.emit(self) #if flip: #if tr['scale'][0] < 0 xor tr['scale'][1] < 0: #return #else: #self.userTransform.setScale([-tr['scale'][0], tr['scale'][1]]) #self.userTransform.setTranslate([-tr['pos'][0], tr['pos'][1]]) #self.userTransform.setRotate(-tr['angle']) #self.updateTransform() #self.selectBoxFromUser() #return #elif not flip: #if tr['scale'][0] > 0 and tr['scale'][1] > 0: #return #else: #self.userTransform.setScale([-tr['scale'][0], tr['scale'][1]]) #self.userTransform.setTranslate([-tr['pos'][0], tr['pos'][1]]) #self.userTransform.setRotate(-tr['angle']) #self.updateTransform() #self.selectBoxFromUser() #return def mirrorXY(self): if not self.isMovable(): return self.rotate(180.) # inv = SRTTransform() # inv.scale(-1, -1) # self.userTransform = self.userTransform * inv #flip lr/ud # s=self.updateTransform() # self.setTranslate(-2*s['pos'][0], -2*s['pos'][1]) # self.selectBoxFromUser() def hasUserTransform(self): #print self.userRotate, self.userTranslate return not self.userTransform.isIdentity() def ctrlWidget(self): return self.ctrl def alphaChanged(self, val): alpha = val / 1023. self._graphicsItem.setOpacity(alpha) def setAlpha(self, alpha): self.alphaSlider.setValue(int(fn.clip_scalar(alpha * 1023, 0, 1023))) def alpha(self): return self.alphaSlider.value() / 1023. def isMovable(self): return self.opts['movable'] def selectBoxMoved(self): """The selection box has moved; get its transformation information and pass to the graphics item""" self.userTransform = self.selectBox.getGlobalTransform(relativeTo=self.selectBoxBase) self.updateTransform() def scale(self, x, y): self.userTransform.scale(x, y) self.selectBoxFromUser() self.updateTransform() def rotate(self, ang): self.userTransform.rotate(ang) self.selectBoxFromUser() self.updateTransform() def translate(self, x, y): self.userTransform.translate(x, y) self.selectBoxFromUser() self.updateTransform() def setTranslate(self, x, y): self.userTransform.setTranslate(x, y) self.selectBoxFromUser() self.updateTransform() def setRotate(self, angle): self.userTransform.setRotate(angle) self.selectBoxFromUser() self.updateTransform() def setScale(self, x, y): self.userTransform.setScale(x, y) self.selectBoxFromUser() self.updateTransform() def setTemporaryTransform(self, transform): self.tempTransform = transform self.updateTransform() def applyTemporaryTransform(self): """Collapses tempTransform into UserTransform, resets tempTransform""" self.userTransform = self.userTransform * self.tempTransform ## order is important! self.resetTemporaryTransform() self.selectBoxFromUser() ## update the selection box to match the new userTransform def resetTemporaryTransform(self): self.tempTransform = SRTTransform() ## don't use Transform.reset()--this transform might be used elsewhere. self.updateTransform() def transform(self): return self._graphicsItem.transform() def updateTransform(self): """Regenerate the item position from the base, user, and temp transforms""" transform = self.baseTransform * self.userTransform * self.tempTransform ## order is important s = transform.saveState() self._graphicsItem.setPos(*s['pos']) self.itemRotation.setAngle(s['angle']) self.itemScale.setXScale(s['scale'][0]) self.itemScale.setYScale(s['scale'][1]) self.displayTransform(transform) return(s) # return the transform state def displayTransform(self, transform): """Updates transform numbers in the ctrl widget.""" tr = transform.saveState() self.transformGui.translateLabel.setText("Translate: (%f, %f)" %(tr['pos'][0], tr['pos'][1])) self.transformGui.rotateLabel.setText("Rotate: %f degrees" %tr['angle']) self.transformGui.scaleLabel.setText("Scale: (%f, %f)" %(tr['scale'][0], tr['scale'][1])) def resetUserTransform(self): self.userTransform.reset() self.updateTransform() self.selectBox.blockSignals(True) self.selectBoxToItem() self.selectBox.blockSignals(False) self.sigTransformChanged.emit(self) self.sigTransformChangeFinished.emit(self) def resetTransformClicked(self): self.resetUserTransform() self.sigResetUserTransform.emit(self) def restoreTransform(self, tr): try: self.userTransform = SRTTransform(tr) self.updateTransform() self.selectBoxFromUser() ## move select box to match self.sigTransformChanged.emit(self) self.sigTransformChangeFinished.emit(self) except: self.userTransform = SRTTransform() debug.printExc("Failed to load transform:") def saveTransform(self): """Return a dict containing the current user transform""" return self.userTransform.saveState() def selectBoxFromUser(self): """Move the selection box to match the current userTransform""" ## user transform #trans = QtGui.QTransform() #trans.translate(*self.userTranslate) #trans.rotate(-self.userRotate) #x2, y2 = trans.map(*self.selectBoxBase['pos']) self.selectBox.blockSignals(True) self.selectBox.setState(self.selectBoxBase) self.selectBox.applyGlobalTransform(self.userTransform) #self.selectBox.setAngle(self.userRotate) #self.selectBox.setPos([x2, y2]) self.selectBox.blockSignals(False) def selectBoxToItem(self): """Move/scale the selection box so it fits the item's bounding rect. (assumes item is not rotated)""" self.itemRect = self._graphicsItem.boundingRect() rect = self._graphicsItem.mapRectToParent(self.itemRect) self.selectBox.blockSignals(True) self.selectBox.setPos([rect.x(), rect.y()]) self.selectBox.setSize(rect.size()) self.selectBox.setAngle(0) self.selectBoxBase = self.selectBox.getState().copy() self.selectBox.blockSignals(False) def zValue(self): return self.opts['z'] def setZValue(self, z): self.opts['z'] = z if z is not None: self._graphicsItem.setZValue(z) def selectionChanged(self, sel, multi): """ Inform the item that its selection state has changed. ============== ========================================================= **Arguments:** sel (bool) whether the item is currently selected multi (bool) whether there are multiple items currently selected ============== ========================================================= """ self.selectedAlone = sel and not multi self.showSelectBox() if self.selectedAlone: self.ctrlWidget().show() else: self.ctrlWidget().hide() def showSelectBox(self): """Display the selection box around this item if it is selected and movable""" if self.selectedAlone and self.isMovable() and self.isVisible(): #and len(self.canvas.itemList.selectedItems())==1: self.selectBox.show() else: self.selectBox.hide() def hideSelectBox(self): self.selectBox.hide() def selectBoxChanged(self): self.selectBoxMoved() self.sigTransformChanged.emit(self) def selectBoxChangeFinished(self): self.sigTransformChangeFinished.emit(self) def alphaPressed(self): """Hide selection box while slider is moving""" self.hideSelectBox() def alphaReleased(self): self.showSelectBox() def show(self): if self.opts['visible']: return self.opts['visible'] = True self._graphicsItem.show() self.showSelectBox() self.sigVisibilityChanged.emit(self) def hide(self): if not self.opts['visible']: return self.opts['visible'] = False self._graphicsItem.hide() self.hideSelectBox() self.sigVisibilityChanged.emit(self) def setVisible(self, vis): if vis: self.show() else: self.hide() def isVisible(self): return self.opts['visible'] def saveState(self): return { 'type': self.__class__.__name__, 'name': self.name, 'visible': self.isVisible(), 'alpha': self.alpha(), 'userTransform': self.saveTransform(), 'z': self.zValue(), 'scalable': self.opts['scalable'], 'rotatable': self.opts['rotatable'], 'movable': self.opts['movable'], } def restoreState(self, state): self.setVisible(state['visible']) self.setAlpha(state['alpha']) self.restoreTransform(state['userTransform']) self.setZValue(state['z']) class GroupCanvasItem(CanvasItem): """ Canvas item used for grouping others """ def __init__(self, **opts): defOpts = {'movable': False, 'scalable': False} defOpts.update(opts) item = ItemGroup() CanvasItem.__init__(self, item, **defOpts)