def keypress(self, size, key):
key = self.body.keypress(size, key)
if key == 'home':
pos = self.body.get_home()
if pos:
self.change_focus(size, pos, coming_from='below')
elif key == 'end':
pos = self.body.get_end()
if pos:
self.change_focus(size, pos, coming_from='above')
elif key:
return ListBox.keypress(self, size, key)
def keypress(self, size, key):
key = self.body.keypress(size, key)
if key == 'home':
pos = self.body.get_home()
if pos:
self.change_focus(size, pos, coming_from='below')
elif key == 'end':
pos = self.body.get_end()
if pos:
self.change_focus(size, pos, coming_from='above')
elif key:
return ListBox.keypress(self, size, key)
def keypress(self, size, key):
last_position = len(self.body) - 1
if self.focus_position == 0 and key in ['up', 'page up']:
self.change_focus(size, last_position, coming_from='below')
return None
if self.focus_position == last_position and key in [
'down', 'page down'
]:
self.change_focus(size, 0, coming_from='above')
return None
return ListBox.keypress(self, size, key)
class TreeBox(WidgetWrap):
"""
A widget that displays a given :class:`Tree`.
This is essentially a :class:`ListBox` with the ability to move the focus
based on directions in the Tree and to collapse/expand subtrees if
possible.
TreeBox interprets `left/right` as well as `page up/`page down` to move the
focus to parent/first child and next/previous sibling respectively. All
other keys are passed to the underlying ListBox.
"""
def __init__(self, tree, focus=None):
"""
:param tree: tree of widgets to be displayed.
:type tree: Tree
:param focus: initially focussed position
"""
self._tree = tree
self._walker = TreeListWalker(tree)
self._outer_list = ListBox(self._walker)
if focus is not None:
self._outer_list.set_focus(focus)
self.__super.__init__(self._outer_list)
# Widget API
def get_focus(self):
return self._outer_list.get_focus()
def set_focus(self, pos):
return self._outer_list.set_focus(pos)
def refresh(self):
self._walker.clear_cache()
signals.emit_signal(self._walker, "modified")
def keypress(self, size, key):
key = self._outer_list.keypress(size, key)
if key in [
'left',
'right',
'[',
']',
'-',
'+',
'C',
'E',
]:
if key == 'left':
self.focus_parent()
elif key == 'right':
self.focus_first_child()
elif key == '[':
self.focus_prev_sibling()
elif key == ']':
self.focus_next_sibling()
elif key == '-':
self.collapse_focussed()
elif key == '+':
self.expand_focussed()
elif key == 'C':
self.collapse_all()
elif key == 'E':
self.expand_all()
# This is a hack around ListBox misbehaving:
# it seems impossible to set the focus without calling keypress as
# otherwise the change becomes visible only after the next render()
return self._outer_list.keypress(size, None)
else:
return self._outer_list.keypress(size, key)
# Collapse operations
def collapse_focussed(self):
"""
Collapse currently focussed position; works only if the underlying
tree allows it.
"""
if implementsCollapseAPI(self._tree):
w, focuspos = self.get_focus()
self._tree.collapse(focuspos)
self._walker.clear_cache()
self.refresh()
def expand_focussed(self):
"""
Expand currently focussed position; works only if the underlying
tree allows it.
"""
if implementsCollapseAPI(self._tree):
w, focuspos = self.get_focus()
self._tree.expand(focuspos)
self._walker.clear_cache()
self.refresh()
def collapse_all(self):
"""
Collapse all positions; works only if the underlying tree allows it.
"""
if implementsCollapseAPI(self._tree):
self._tree.collapse_all()
self.set_focus(self._tree.root)
self._walker.clear_cache()
self.refresh()
def expand_all(self):
"""
Expand all positions; works only if the underlying tree allows it.
"""
if implementsCollapseAPI(self._tree):
self._tree.expand_all()
self._walker.clear_cache()
self.refresh()
# Tree based focus movement
def focus_parent(self):
"""move focus to parent node of currently focussed one"""
w, focuspos = self.get_focus()
parent = self._tree.parent_position(focuspos)
if parent is not None:
self.set_focus(parent)
def focus_first_child(self):
"""move focus to first child of currently focussed one"""
w, focuspos = self.get_focus()
child = self._tree.first_child_position(focuspos)
if child is not None:
self.set_focus(child)
def focus_last_child(self):
"""move focus to last child of currently focussed one"""
w, focuspos = self.get_focus()
child = self._tree.last_child_position(focuspos)
if child is not None:
self.set_focus(child)
def focus_next_sibling(self):
"""move focus to next sibling of currently focussed one"""
w, focuspos = self.get_focus()
sib = self._tree.next_sibling_position(focuspos)
if sib is not None:
self.set_focus(sib)
def focus_prev_sibling(self):
"""move focus to previous sibling of currently focussed one"""
w, focuspos = self.get_focus()
sib = self._tree.prev_sibling_position(focuspos)
if sib is not None:
self.set_focus(sib)
def focus_next(self):
"""move focus to next position (DFO)"""
w, focuspos = self.get_focus()
next = self._tree.next_position(focuspos)
if next is not None:
self.set_focus(next)
def focus_prev(self):
"""move focus to previous position (DFO)"""
w, focuspos = self.get_focus()
prev = self._tree.prev_position(focuspos)
if prev is not None:
self.set_focus(prev)
class TreeBox(WidgetWrap):
"""
A widget representing something in a nested tree display.
This is essentially a ListBox with the ability to move the focus based on
directions in the Tree.
TreeBox interprets `left/right` as well as page `up/down` to move the focus
to parent/first child and next/previous sibling respectively. All other
keys are passed to the underlying ListBox.
"""
_selectable = True
def __init__(self, walker, **kwargs):
"""
:param walker: tree of widgets to be displayed.
In case we are given a raw `TreeWalker`, it will be used though
`TreeListWalker` which means no decoration.
:type walker: TreeWalker or TreeListWalker
"""
if not isinstance(walker, TreeListWalker):
walker = TreeListWalker(walker)
self._walker = walker
self._outer_list = ListBox(walker)
self.__super.__init__(self._outer_list)
# Widget API
def get_focus(self):
return self._outer_list.get_focus()
def keypress(self, size, key):
key = self._outer_list.keypress(size, key)
if key in ['left', 'right', '[', ']', '-', '+', 'C', 'E']:
if key == 'left':
self.focus_parent()
elif key == 'right':
self.focus_first_child()
elif key == '[':
self.focus_prev_sibling()
elif key == ']':
self.focus_next_sibling()
if isinstance(self._walker, CollapseMixin):
if key == '-':
w, focuspos = self._walker.get_focus()
self._walker.collapse(focuspos)
elif key == '+':
w, focuspos = self._walker.get_focus()
self._walker.expand(focuspos)
elif key == 'C':
self._walker.collapse_all()
elif key == 'E':
self._walker.expand_all()
# This is a hack around ListBox misbehaving:
# it seems impossible to set the focus without calling keypress as
# otherwise the change becomes visible only after the next render()
return self._outer_list.keypress(size, None)
else:
return self._outer_list.keypress(size, key)
# Tree based focus movement
def focus_parent(self):
w, focuspos = self._walker.get_focus()
parent = self._walker.parent_position(focuspos)
if parent is not None:
self._outer_list.set_focus(parent)
def focus_first_child(self):
w, focuspos = self._walker.get_focus()
child = self._walker.first_child_position(focuspos)
if child is not None:
self._outer_list.set_focus(child)
def focus_next_sibling(self):
w, focuspos = self._walker.get_focus()
sib = self._walker.next_sibling_position(focuspos)
if sib is not None:
self._outer_list.set_focus(sib)
def focus_prev_sibling(self):
w, focuspos = self._walker.get_focus()
sib = self._walker.prev_sibling_position(focuspos)
if sib is not None:
self._outer_list.set_focus(sib)
class TreeBox(WidgetWrap):
"""
A widget representing something in a nested tree display.
This is essentially a ListBox with the ability to move the focus based on
directions in the Tree.
TreeBox interprets `left/right` as well as page `up/down` to move the focus
to parent/first child and next/previous sibling respectively. All other
keys are passed to the underlying ListBox.
"""
_selectable = True
def __init__(self, walker, **kwargs):
"""
:param walker: tree of widgets to be displayed.
In case we are given a raw `TreeWalker`, it will be used though
`TreeListWalker` which means no decoration.
:type walker: TreeWalker or TreeListWalker
"""
if not isinstance(walker, TreeListWalker):
walker = TreeListWalker(walker)
self._walker = walker
self._outer_list = ListBox(walker)
self.__super.__init__(self._outer_list)
# Widget API
def get_focus(self):
return self._outer_list.get_focus()
def keypress(self, size, key):
key = self._outer_list.keypress(size, key)
if key in ['left', 'right', '[', ']', '-', '+', 'C', 'E']:
if key == 'left':
self.focus_parent()
elif key == 'right':
self.focus_first_child()
elif key == '[':
self.focus_prev_sibling()
elif key == ']':
self.focus_next_sibling()
if isinstance(self._walker, CollapseMixin):
if key == '-':
w, focuspos = self._walker.get_focus()
self._walker.collapse(focuspos)
elif key == '+':
w, focuspos = self._walker.get_focus()
self._walker.expand(focuspos)
elif key == 'C':
self._walker.collapse_all()
elif key == 'E':
self._walker.expand_all()
# This is a hack around ListBox misbehaving:
# it seems impossible to set the focus without calling keypress as
# otherwise the change becomes visible only after the next render()
return self._outer_list.keypress(size, None)
else:
return self._outer_list.keypress(size, key)
# Tree based focus movement
def focus_parent(self):
w, focuspos = self._walker.get_focus()
parent = self._walker.parent_position(focuspos)
if parent is not None:
self._outer_list.set_focus(parent)
def focus_first_child(self):
w, focuspos = self._walker.get_focus()
child = self._walker.first_child_position(focuspos)
if child is not None:
self._outer_list.set_focus(child)
def focus_next_sibling(self):
w, focuspos = self._walker.get_focus()
sib = self._walker.next_sibling_position(focuspos)
if sib is not None:
self._outer_list.set_focus(sib)
def focus_prev_sibling(self):
w, focuspos = self._walker.get_focus()
sib = self._walker.prev_sibling_position(focuspos)
if sib is not None:
self._outer_list.set_focus(sib)
class TreeBox(WidgetWrap):
"""
A widget that displays a given :class:`Tree`.
This is essentially a :class:`ListBox` with the ability to move the focus
based on directions in the Tree and to collapse/expand subtrees if
possible.
TreeBox interprets `left/right` as well as `page up/`page down` to move the
focus to parent/first child and next/previous sibling respectively. All
other keys are passed to the underlying ListBox.
"""
def __init__(self, tree, focus=None):
"""
:param tree: tree of widgets to be displayed.
:type tree: Tree
:param focus: initially focussed position
"""
self._tree = tree
self._walker = TreeListWalker(tree)
self._outer_list = ListBox(self._walker)
if focus is not None:
self._outer_list.set_focus(focus)
self.__super.__init__(self._outer_list)
# Widget API
def get_focus(self):
return self._outer_list.get_focus()
def set_focus(self, pos):
return self._outer_list.set_focus(pos)
def refresh(self):
self._walker.clear_cache()
signals.emit_signal(self._walker, "modified")
def keypress(self, size, key):
key = self._outer_list.keypress(size, key)
if key in ["left", "right", "[", "]", "-", "+", "C", "E"]:
if key == "left":
self.focus_parent()
elif key == "right":
self.focus_first_child()
elif key == "[":
self.focus_prev_sibling()
elif key == "]":
self.focus_next_sibling()
elif key == "-":
self.collapse_focussed()
elif key == "+":
self.expand_focussed()
elif key == "C":
self.collapse_all()
elif key == "E":
self.expand_all()
# This is a hack around ListBox misbehaving:
# it seems impossible to set the focus without calling keypress as
# otherwise the change becomes visible only after the next render()
return self._outer_list.keypress(size, None)
else:
return self._outer_list.keypress(size, key)
# Collapse operations
def collapse_focussed(self):
"""
Collapse currently focussed position; works only if the underlying
tree allows it.
"""
if implementsCollapseAPI(self._tree):
w, focuspos = self.get_focus()
self._tree.collapse(focuspos)
self._walker.clear_cache()
self.refresh()
def expand_focussed(self):
"""
Expand currently focussed position; works only if the underlying
tree allows it.
"""
if implementsCollapseAPI(self._tree):
w, focuspos = self.get_focus()
self._tree.expand(focuspos)
self._walker.clear_cache()
self.refresh()
def collapse_all(self):
"""
Collapse all positions; works only if the underlying tree allows it.
"""
if implementsCollapseAPI(self._tree):
self._tree.collapse_all()
self.set_focus(self._tree.root)
self._walker.clear_cache()
self.refresh()
def expand_all(self):
"""
Expand all positions; works only if the underlying tree allows it.
"""
if implementsCollapseAPI(self._tree):
self._tree.expand_all()
self._walker.clear_cache()
self.refresh()
# Tree based focus movement
def focus_parent(self):
"""move focus to parent node of currently focussed one"""
w, focuspos = self.get_focus()
parent = self._tree.parent_position(focuspos)
if parent is not None:
self.set_focus(parent)
def focus_first_child(self):
"""move focus to first child of currently focussed one"""
w, focuspos = self.get_focus()
child = self._tree.first_child_position(focuspos)
if child is not None:
self.set_focus(child)
def focus_last_child(self):
"""move focus to last child of currently focussed one"""
w, focuspos = self.get_focus()
child = self._tree.last_child_position(focuspos)
if child is not None:
self.set_focus(child)
def focus_next_sibling(self):
"""move focus to next sibling of currently focussed one"""
w, focuspos = self.get_focus()
sib = self._tree.next_sibling_position(focuspos)
if sib is not None:
self.set_focus(sib)
def focus_prev_sibling(self):
"""move focus to previous sibling of currently focussed one"""
w, focuspos = self.get_focus()
sib = self._tree.prev_sibling_position(focuspos)
if sib is not None:
self.set_focus(sib)
def focus_next(self):
"""move focus to next position (DFO)"""
w, focuspos = self.get_focus()
next = self._tree.next_position(focuspos)
if next is not None:
self.set_focus(next)
def focus_prev(self):
"""move focus to previous position (DFO)"""
w, focuspos = self.get_focus()
prev = self._tree.prev_position(focuspos)
if prev is not None:
self.set_focus(prev)
