/usr/lib/python2.7/dist-packages/pyqtgraph/parametertree/ParameterTree.py is in python-pyqtgraph 0.9.10-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | from ..Qt import QtCore, QtGui
from ..widgets.TreeWidget import TreeWidget
import os, weakref, re
from .ParameterItem import ParameterItem
#import functions as fn
class ParameterTree(TreeWidget):
"""Widget used to display or control data from a hierarchy of Parameters"""
def __init__(self, parent=None, showHeader=True):
"""
============== ========================================================
**Arguments:**
parent (QWidget) An optional parent widget
showHeader (bool) If True, then the QTreeView header is displayed.
============== ========================================================
"""
TreeWidget.__init__(self, parent)
self.setVerticalScrollMode(self.ScrollPerPixel)
self.setHorizontalScrollMode(self.ScrollPerPixel)
self.setAnimated(False)
self.setColumnCount(2)
self.setHeaderLabels(["Parameter", "Value"])
self.setAlternatingRowColors(True)
self.paramSet = None
self.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
self.setHeaderHidden(not showHeader)
self.itemChanged.connect(self.itemChangedEvent)
self.lastSel = None
self.setRootIsDecorated(False)
def setParameters(self, param, showTop=True):
"""
Set the top-level :class:`Parameter <pyqtgraph.parametertree.Parameter>`
to be displayed in this ParameterTree.
If *showTop* is False, then the top-level parameter is hidden and only
its children will be visible. This is a convenience method equivalent
to::
tree.clear()
tree.addParameters(param, showTop)
"""
self.clear()
self.addParameters(param, showTop=showTop)
def addParameters(self, param, root=None, depth=0, showTop=True):
"""
Adds one top-level :class:`Parameter <pyqtgraph.parametertree.Parameter>`
to the view.
============== ==========================================================
**Arguments:**
param The :class:`Parameter <pyqtgraph.parametertree.Parameter>`
to add.
root The item within the tree to which *param* should be added.
By default, *param* is added as a top-level item.
showTop If False, then *param* will be hidden, and only its
children will be visible in the tree.
============== ==========================================================
"""
item = param.makeTreeItem(depth=depth)
if root is None:
root = self.invisibleRootItem()
## Hide top-level item
if not showTop:
item.setText(0, '')
item.setSizeHint(0, QtCore.QSize(1,1))
item.setSizeHint(1, QtCore.QSize(1,1))
depth -= 1
root.addChild(item)
item.treeWidgetChanged()
for ch in param:
self.addParameters(ch, root=item, depth=depth+1)
def clear(self):
"""
Remove all parameters from the tree.
"""
self.invisibleRootItem().takeChildren()
def focusNext(self, item, forward=True):
"""Give input focus to the next (or previous) item after *item*
"""
while True:
parent = item.parent()
if parent is None:
return
nextItem = self.nextFocusableChild(parent, item, forward=forward)
if nextItem is not None:
nextItem.setFocus()
self.setCurrentItem(nextItem)
return
item = parent
def focusPrevious(self, item):
self.focusNext(item, forward=False)
def nextFocusableChild(self, root, startItem=None, forward=True):
if startItem is None:
if forward:
index = 0
else:
index = root.childCount()-1
else:
if forward:
index = root.indexOfChild(startItem) + 1
else:
index = root.indexOfChild(startItem) - 1
if forward:
inds = list(range(index, root.childCount()))
else:
inds = list(range(index, -1, -1))
for i in inds:
item = root.child(i)
if hasattr(item, 'isFocusable') and item.isFocusable():
return item
else:
item = self.nextFocusableChild(item, forward=forward)
if item is not None:
return item
return None
def contextMenuEvent(self, ev):
item = self.currentItem()
if hasattr(item, 'contextMenuEvent'):
item.contextMenuEvent(ev)
def itemChangedEvent(self, item, col):
if hasattr(item, 'columnChangedEvent'):
item.columnChangedEvent(col)
def selectionChanged(self, *args):
sel = self.selectedItems()
if len(sel) != 1:
sel = None
if self.lastSel is not None and isinstance(self.lastSel, ParameterItem):
self.lastSel.selected(False)
if sel is None:
self.lastSel = None
return
self.lastSel = sel[0]
if hasattr(sel[0], 'selected'):
sel[0].selected(True)
return TreeWidget.selectionChanged(self, *args)
def wheelEvent(self, ev):
self.clearSelection()
return TreeWidget.wheelEvent(self, ev)
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