def __init__(self, title: str, data: Dict[str, str]):
super().__init__()
# ─────────────────── Add content ────────────────── #
self.setColumnCount(2)
parent_item = QTreeWidgetItem(self, [f'{title} : '])
parent_item.set_selectable(False)
self.addTopLevelItem(parent_item)
for key, val in data.items():
item = QTreeWidgetItem(parent_item, [f'{key} : ', val])
parent_item.addChild(item)
# Cosmetics
item.set_selectable(False)
item.setTextAlignment(0, Qt.AlignRight)
# ──────────────────── Cosmetics ─────────────────── #
# Hide header
self.header().hide()
# No background
self.setStyleSheet('background-color: transparent;')
# Dynamically change height when widget is collapsed or expanded
# You have to update the maximum height of the widget, based on
# its contents. For each top item you need to get the height for
# that row using rowHeight() and do the same recursively for
# child items whenever the item is expanded. Also, you need to
# overwrite the sizeHint and minimumSizeHint.
self.expanded.connect(self.update_height)
self.collapsed.connect(self.update_height)
def __init__(self, title: str, data: Dict[str, str]):
"""
Init self with a title and a dictionnary of keys and values (see
self docstring).
:param title: The title of the disclosure tree (e.g. 'Details'
in dEAduction's course and exercise choosers.
:param data: The data to be displayed in the disclosure
triangle.
"""
super().__init__()
# ─────────────────── Add content ────────────────── #
self.setColumnCount(2)
self.__parent_item = QTreeWidgetItem(self, [f'{title} : '])
self.__parent_item.set_selectable(False)
self.addTopLevelItem(self.__parent_item)
for key, val in data.items():
item = QTreeWidgetItem(self.__parent_item, [f'{key} : ', val])
self.__parent_item.addChild(item)
# Cosmetics
item.set_selectable(False)
item.setTextAlignment(0, Qt.AlignRight)
# ──────────────────── Cosmetics ─────────────────── #
# Hide header
self.header().hide()
# No background
self.setStyleSheet('background-color: transparent;')
# Dynamically change height when widget is collapsed or expanded
# You have to update the maximum height of the widget, based on
# its contents. For each top item you need to get the height for
# that row using rowHeight() and do the same recursively for
# child items whenever the item is expanded. Also, you need to
# overwrite the sizeHint and minimumSizeHint.
self.expanded.connect(self.update_height)
self.collapsed.connect(self.update_height)
class DisclosureTriangle(QTreeWidget):
"""
An (very basic) implementation of a DisclosureTriangle, i.e. a
widget that looks like this:
____________________
| |
| |> Title: |
| key1: val1 |
| key2: val2 |
| … |
--------------------
This triangle can be expanded or collapsed and is instanciated with
a title and a dictionnary of keys and values. Made with the help of
musicamente on Stackoverflow: https://stackoverflow.com/questions/
63862724/
qtreeview-dynamic-height-according-to-content-disclosure-triangle.
"""
def __init__(self, title: str, data: Dict[str, str]):
"""
Init self with a title and a dictionnary of keys and values (see
self docstring).
:param title: The title of the disclosure tree (e.g. 'Details'
in dEAduction's course and exercise choosers.
:param data: The data to be displayed in the disclosure
triangle.
"""
super().__init__()
# ─────────────────── Add content ────────────────── #
self.setColumnCount(2)
self.__parent_item = QTreeWidgetItem(self, [f'{title} : '])
self.__parent_item.set_selectable(False)
self.addTopLevelItem(self.__parent_item)
for key, val in data.items():
item = QTreeWidgetItem(self.__parent_item, [f'{key} : ', val])
self.__parent_item.addChild(item)
# Cosmetics
item.set_selectable(False)
item.setTextAlignment(0, Qt.AlignRight)
# ──────────────────── Cosmetics ─────────────────── #
# Hide header
self.header().hide()
# No background
self.setStyleSheet('background-color: transparent;')
# Dynamically change height when widget is collapsed or expanded
# You have to update the maximum height of the widget, based on
# its contents. For each top item you need to get the height for
# that row using rowHeight() and do the same recursively for
# child items whenever the item is expanded. Also, you need to
# overwrite the sizeHint and minimumSizeHint.
self.expanded.connect(self.update_height)
self.collapsed.connect(self.update_height)
def expand(self, yes: bool = True):
"""
Expand the tree is yes is True, collapse it otherwise.
:param yes: See above.
"""
if yes:
self.expandItem(self.__parent_item)
else:
self.collapseItem(self.__parent_item)
#####################
# Redifined methods #
#####################
# See
# https://stackoverflow.com/questions/63862724/
# qtreeview-dynamic-height-according-to-content-disclosure-triangle
def update_height(self):
self.setMaximumHeight(self.sizeHint().height())
def get_height(self, parent=None):
height = 0
if not parent:
parent = self.rootIndex()
for row in range(self.model().rowCount(parent)):
child = self.model().index(row, 0, parent)
height += self.rowHeight(child)
if self.isExpanded(child) and self.model().hasChildren(child):
height += self.get_height(child)
return height
def sizeHint(self):
hint = super().sizeHint()
# The + 10 avoids an ugly scroll bar
hint.setHeight(self.get_height() + 10 + self.frameWidth() * 2)
return hint
def minimumSizeHint(self):
return self.sizeHint()
