470 lines
16 KiB
Python
470 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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from ..Qt import QtGui, QtCore, QT_LIB
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from ..graphicsItems.ROI import ROI
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from ..graphicsItems.ViewBox import ViewBox
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from ..graphicsItems.GridItem import GridItem
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import importlib
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ui_template = importlib.import_module(
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f'.CanvasTemplate_{QT_LIB.lower()}', package=__package__)
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import numpy as np
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from .. import debug
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import weakref
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import gc
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from .CanvasManager import CanvasManager
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from .CanvasItem import CanvasItem, GroupCanvasItem
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class Canvas(QtGui.QWidget):
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sigSelectionChanged = QtCore.Signal(object, object)
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sigItemTransformChanged = QtCore.Signal(object, object)
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sigItemTransformChangeFinished = QtCore.Signal(object, object)
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def __init__(self, parent=None, allowTransforms=True, hideCtrl=False, name=None):
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QtGui.QWidget.__init__(self, parent)
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self.ui = ui_template.Ui_Form()
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self.ui.setupUi(self)
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self.view = ViewBox()
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self.ui.view.setCentralItem(self.view)
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self.itemList = self.ui.itemList
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self.itemList.setSelectionMode(self.itemList.ExtendedSelection)
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self.allowTransforms = allowTransforms
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self.multiSelectBox = SelectBox()
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self.view.addItem(self.multiSelectBox)
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self.multiSelectBox.hide()
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self.multiSelectBox.setZValue(1e6)
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self.ui.mirrorSelectionBtn.hide()
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self.ui.reflectSelectionBtn.hide()
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self.ui.resetTransformsBtn.hide()
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self.redirect = None ## which canvas to redirect items to
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self.items = []
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self.view.setAspectLocked(True)
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grid = GridItem()
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self.grid = CanvasItem(grid, name='Grid', movable=False)
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self.addItem(self.grid)
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self.hideBtn = QtGui.QPushButton('>', self)
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self.hideBtn.setFixedWidth(20)
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self.hideBtn.setFixedHeight(20)
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self.ctrlSize = 200
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self.sizeApplied = False
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self.hideBtn.clicked.connect(self.hideBtnClicked)
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self.ui.splitter.splitterMoved.connect(self.splitterMoved)
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self.ui.itemList.itemChanged.connect(self.treeItemChanged)
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self.ui.itemList.sigItemMoved.connect(self.treeItemMoved)
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self.ui.itemList.itemSelectionChanged.connect(self.treeItemSelected)
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self.ui.autoRangeBtn.clicked.connect(self.autoRange)
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self.ui.redirectCheck.toggled.connect(self.updateRedirect)
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self.ui.redirectCombo.currentIndexChanged.connect(self.updateRedirect)
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self.multiSelectBox.sigRegionChanged.connect(self.multiSelectBoxChanged)
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self.multiSelectBox.sigRegionChangeFinished.connect(self.multiSelectBoxChangeFinished)
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self.ui.mirrorSelectionBtn.clicked.connect(self.mirrorSelectionClicked)
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self.ui.reflectSelectionBtn.clicked.connect(self.reflectSelectionClicked)
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self.ui.resetTransformsBtn.clicked.connect(self.resetTransformsClicked)
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self.resizeEvent()
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if hideCtrl:
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self.hideBtnClicked()
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if name is not None:
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self.registeredName = CanvasManager.instance().registerCanvas(self, name)
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self.ui.redirectCombo.setHostName(self.registeredName)
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self.menu = QtGui.QMenu()
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remAct = QtGui.QAction("Remove item", self.menu)
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remAct.triggered.connect(self.removeClicked)
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self.menu.addAction(remAct)
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self.menu.remAct = remAct
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self.ui.itemList.contextMenuEvent = self.itemListContextMenuEvent
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def splitterMoved(self):
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self.resizeEvent()
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def hideBtnClicked(self):
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ctrlSize = self.ui.splitter.sizes()[1]
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if ctrlSize == 0:
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cs = self.ctrlSize
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w = self.ui.splitter.size().width()
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if cs > w:
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cs = w - 20
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self.ui.splitter.setSizes([w-cs, cs])
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self.hideBtn.setText('>')
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else:
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self.ctrlSize = ctrlSize
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self.ui.splitter.setSizes([100, 0])
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self.hideBtn.setText('<')
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self.resizeEvent()
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def autoRange(self):
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self.view.autoRange()
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def resizeEvent(self, ev=None):
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if ev is not None:
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super().resizeEvent(ev)
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self.hideBtn.move(self.ui.view.size().width() - self.hideBtn.width(), 0)
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if not self.sizeApplied:
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self.sizeApplied = True
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s = min(self.width(), max(100, min(200, self.width()*0.25)))
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s2 = self.width()-s
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self.ui.splitter.setSizes([s2, s])
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def updateRedirect(self, *args):
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### Decide whether/where to redirect items and make it so
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cname = str(self.ui.redirectCombo.currentText())
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man = CanvasManager.instance()
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if self.ui.redirectCheck.isChecked() and cname != '':
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redirect = man.getCanvas(cname)
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else:
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redirect = None
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if self.redirect is redirect:
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return
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self.redirect = redirect
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if redirect is None:
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self.reclaimItems()
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else:
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self.redirectItems(redirect)
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def redirectItems(self, canvas):
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for i in self.items:
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if i is self.grid:
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continue
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li = i.listItem
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parent = li.parent()
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if parent is None:
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tree = li.treeWidget()
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if tree is None:
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print("Skipping item", i, i.name)
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continue
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tree.removeTopLevelItem(li)
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else:
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parent.removeChild(li)
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canvas.addItem(i)
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def reclaimItems(self):
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items = self.items
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self.items = [self.grid]
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items.remove(self.grid)
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for i in items:
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i.canvas.removeItem(i)
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self.addItem(i)
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def treeItemChanged(self, item, col):
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try:
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citem = item.canvasItem()
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except AttributeError:
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return
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if item.checkState(0) == QtCore.Qt.Checked:
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for i in range(item.childCount()):
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item.child(i).setCheckState(0, QtCore.Qt.Checked)
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citem.show()
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else:
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for i in range(item.childCount()):
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item.child(i).setCheckState(0, QtCore.Qt.Unchecked)
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citem.hide()
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def treeItemSelected(self):
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sel = self.selectedItems()
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if len(sel) == 0:
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return
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multi = len(sel) > 1
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for i in self.items:
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## updated the selected state of every item
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i.selectionChanged(i in sel, multi)
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if len(sel)==1:
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self.multiSelectBox.hide()
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self.ui.mirrorSelectionBtn.hide()
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self.ui.reflectSelectionBtn.hide()
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self.ui.resetTransformsBtn.hide()
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elif len(sel) > 1:
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self.showMultiSelectBox()
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self.sigSelectionChanged.emit(self, sel)
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def selectedItems(self):
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"""
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Return list of all selected canvasItems
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"""
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return [item.canvasItem() for item in self.itemList.selectedItems() if item.canvasItem() is not None]
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def selectItem(self, item):
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li = item.listItem
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self.itemList.setCurrentItem(li)
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def showMultiSelectBox(self):
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## Get list of selected canvas items
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items = self.selectedItems()
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rect = self.view.itemBoundingRect(items[0].graphicsItem())
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for i in items:
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if not i.isMovable(): ## all items in selection must be movable
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return
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br = self.view.itemBoundingRect(i.graphicsItem())
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rect = rect|br
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self.multiSelectBox.blockSignals(True)
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self.multiSelectBox.setPos([rect.x(), rect.y()])
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self.multiSelectBox.setSize(rect.size())
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self.multiSelectBox.setAngle(0)
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self.multiSelectBox.blockSignals(False)
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self.multiSelectBox.show()
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self.ui.mirrorSelectionBtn.show()
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self.ui.reflectSelectionBtn.show()
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self.ui.resetTransformsBtn.show()
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def mirrorSelectionClicked(self):
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for ci in self.selectedItems():
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ci.mirrorY()
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self.showMultiSelectBox()
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def reflectSelectionClicked(self):
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for ci in self.selectedItems():
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ci.mirrorXY()
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self.showMultiSelectBox()
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def resetTransformsClicked(self):
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for i in self.selectedItems():
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i.resetTransformClicked()
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self.showMultiSelectBox()
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def multiSelectBoxChanged(self):
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self.multiSelectBoxMoved()
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def multiSelectBoxChangeFinished(self):
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for ci in self.selectedItems():
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ci.applyTemporaryTransform()
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ci.sigTransformChangeFinished.emit(ci)
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def multiSelectBoxMoved(self):
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transform = self.multiSelectBox.getGlobalTransform()
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for ci in self.selectedItems():
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ci.setTemporaryTransform(transform)
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ci.sigTransformChanged.emit(ci)
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def addGraphicsItem(self, item, **opts):
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"""Add a new GraphicsItem to the scene at pos.
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Common options are name, pos, scale, and z
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"""
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citem = CanvasItem(item, **opts)
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item._canvasItem = citem
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self.addItem(citem)
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return citem
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def addGroup(self, name, **kargs):
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group = GroupCanvasItem(name=name)
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self.addItem(group, **kargs)
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return group
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def addItem(self, citem):
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"""
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Add an item to the canvas.
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"""
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## Check for redirections
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if self.redirect is not None:
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name = self.redirect.addItem(citem)
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self.items.append(citem)
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return name
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if not self.allowTransforms:
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citem.setMovable(False)
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citem.sigTransformChanged.connect(self.itemTransformChanged)
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citem.sigTransformChangeFinished.connect(self.itemTransformChangeFinished)
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citem.sigVisibilityChanged.connect(self.itemVisibilityChanged)
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## Determine name to use in the item list
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name = citem.opts['name']
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if name is None:
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name = 'item'
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newname = name
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## If name already exists, append a number to the end
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## NAH. Let items have the same name if they really want.
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#c=0
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#while newname in self.items:
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#c += 1
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#newname = name + '_%03d' %c
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#name = newname
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## find parent and add item to tree
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insertLocation = 0
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#print "Inserting node:", name
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## determine parent list item where this item should be inserted
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parent = citem.parentItem()
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if parent in (None, self.view.childGroup):
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parent = self.itemList.invisibleRootItem()
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else:
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parent = parent.listItem
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## set Z value above all other siblings if none was specified
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siblings = [parent.child(i).canvasItem() for i in range(parent.childCount())]
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z = citem.zValue()
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if z is None:
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zvals = [i.zValue() for i in siblings]
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if parent is self.itemList.invisibleRootItem():
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if len(zvals) == 0:
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z = 0
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else:
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z = max(zvals)+10
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else:
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if len(zvals) == 0:
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z = parent.canvasItem().zValue()
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else:
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z = max(zvals)+1
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citem.setZValue(z)
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## determine location to insert item relative to its siblings
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for i in range(parent.childCount()):
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ch = parent.child(i)
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zval = ch.canvasItem().graphicsItem().zValue() ## should we use CanvasItem.zValue here?
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if zval < z:
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insertLocation = i
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break
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else:
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insertLocation = i+1
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node = QtGui.QTreeWidgetItem([name])
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flags = node.flags() | QtCore.Qt.ItemIsUserCheckable | QtCore.Qt.ItemIsDragEnabled
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if not isinstance(citem, GroupCanvasItem):
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flags = flags & ~QtCore.Qt.ItemIsDropEnabled
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node.setFlags(flags)
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if citem.opts['visible']:
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node.setCheckState(0, QtCore.Qt.Checked)
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else:
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node.setCheckState(0, QtCore.Qt.Unchecked)
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node.name = name
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parent.insertChild(insertLocation, node)
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citem.name = name
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citem.listItem = node
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node.canvasItem = weakref.ref(citem)
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self.items.append(citem)
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ctrl = citem.ctrlWidget()
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ctrl.hide()
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self.ui.ctrlLayout.addWidget(ctrl)
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## inform the canvasItem that its parent canvas has changed
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citem.setCanvas(self)
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## Autoscale to fit the first item added (not including the grid).
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if len(self.items) == 2:
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self.autoRange()
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return citem
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def treeItemMoved(self, item, parent, index):
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##Item moved in tree; update Z values
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if parent is self.itemList.invisibleRootItem():
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item.canvasItem().setParentItem(self.view.childGroup)
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else:
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item.canvasItem().setParentItem(parent.canvasItem())
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siblings = [parent.child(i).canvasItem() for i in range(parent.childCount())]
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zvals = [i.zValue() for i in siblings]
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zvals.sort(reverse=True)
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for i in range(len(siblings)):
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item = siblings[i]
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item.setZValue(zvals[i])
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def itemVisibilityChanged(self, item):
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listItem = item.listItem
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checked = listItem.checkState(0) == QtCore.Qt.Checked
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vis = item.isVisible()
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if vis != checked:
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if vis:
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listItem.setCheckState(0, QtCore.Qt.Checked)
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else:
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listItem.setCheckState(0, QtCore.Qt.Unchecked)
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def removeItem(self, item):
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if isinstance(item, QtGui.QTreeWidgetItem):
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item = item.canvasItem()
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if isinstance(item, CanvasItem):
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item.setCanvas(None)
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listItem = item.listItem
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listItem.canvasItem = None
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item.listItem = None
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self.itemList.removeTopLevelItem(listItem)
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self.items.remove(item)
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ctrl = item.ctrlWidget()
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ctrl.hide()
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self.ui.ctrlLayout.removeWidget(ctrl)
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ctrl.setParent(None)
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else:
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if hasattr(item, '_canvasItem'):
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self.removeItem(item._canvasItem)
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else:
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self.view.removeItem(item)
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gc.collect()
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def clear(self):
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while len(self.items) > 0:
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self.removeItem(self.items[0])
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def addToScene(self, item):
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self.view.addItem(item)
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def removeFromScene(self, item):
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self.view.removeItem(item)
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def listItems(self):
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"""Return a dictionary of name:item pairs"""
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return self.items
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def getListItem(self, name):
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return self.items[name]
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def itemTransformChanged(self, item):
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self.sigItemTransformChanged.emit(self, item)
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def itemTransformChangeFinished(self, item):
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self.sigItemTransformChangeFinished.emit(self, item)
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def itemListContextMenuEvent(self, ev):
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self.menuItem = self.itemList.itemAt(ev.pos())
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self.menu.popup(ev.globalPos())
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def removeClicked(self):
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for item in self.selectedItems():
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self.removeItem(item)
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self.menuItem = None
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import gc
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gc.collect()
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class SelectBox(ROI):
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def __init__(self, scalable=False):
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#QtGui.QGraphicsRectItem.__init__(self, 0, 0, size[0], size[1])
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ROI.__init__(self, [0,0], [1,1])
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center = [0.5, 0.5]
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if scalable:
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self.addScaleHandle([1, 1], center, lockAspect=True)
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self.addScaleHandle([0, 0], center, lockAspect=True)
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self.addRotateHandle([0, 1], center)
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self.addRotateHandle([1, 0], center)
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