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|
from collections import OrderedDict
from AnyQt.QtGui import (
QBrush, QPen, QColor, QPainter, QPainterPath, QTransform
)
from AnyQt.QtWidgets import (
QGraphicsItem, QGraphicsEllipseItem, QGraphicsTextItem,
QGraphicsLineItem, QGraphicsScene, QGraphicsView, QStyle, QSizePolicy,
QFormLayout
)
from AnyQt.QtCore import (
Qt, QRectF, QSize, QPointF, QLineF, QTimer,
pyqtSignal, pyqtProperty
)
from Orange.widgets import gui
from Orange.widgets.widget import OWWidget
from Orange.widgets.settings import Setting
DefDroppletBrush = QBrush(Qt.darkGray)
class GraphNode:
def __init__(self, *_, **kwargs):
# Implement edges as an ordered dict to get the nice speed benefits as
# well as adding ordering, which we need to make trees deterministic
self.__edges = kwargs.get("edges", OrderedDict())
def graph_edges(self):
"""Get a list of the edges that stem from the node."""
return self.__edges.keys()
def graph_add_edge(self, edge):
"""Add an edge stemming from the node."""
self.__edges[edge] = 0
def __iter__(self):
for edge in self.__edges.keys():
yield edge.node2
def graph_nodes(self, atype=1):
pass
class GraphEdge:
def __init__(self, node1=None, node2=None, atype=1):
self.node1 = node1
self.node2 = node2
self.type = atype
if node1 is not None:
node1.graph_add_edge(self)
if node2 is not None:
node2.graph_add_edge(self)
class GraphicsDroplet(QGraphicsEllipseItem):
def __init__(self, *args):
super().__init__(*args)
self.setAcceptHoverEvents(True)
self.setAcceptedMouseButtons(Qt.LeftButton)
self.setBrush(QBrush(Qt.gray))
self.setPen(Qt.white)
def hoverEnterEvent(self, event):
super().hoverEnterEvent(event)
self.setBrush(QBrush(QColor(100, 100, 100)))
self.update()
def hoverLeaveEvent(self, event):
super().hoverLeaveEvent(event)
self.setBrush(QBrush(QColor(200, 200, 200)))
self.update()
def mousePressEvent(self, event):
super().mousePressEvent(event)
self.parentItem().set_open(not self.parentItem().isOpen)
if self.scene():
self.scene().fix_pos()
# noinspection PyPep8Naming
class TextTreeNode(QGraphicsTextItem, GraphNode):
def setBackgroundBrush(self, brush):
if self._background_brush != brush:
self._background_brush = QBrush(brush)
color = brush.color()
r, g, b, _ = color.getRgb()
lum = 0.2126 * r + 0.7152 * g + 0.0722 * b
if lum > 100:
self.setDefaultTextColor(Qt.black)
else:
self.setDefaultTextColor(Qt.white)
self.update()
def backgroundBrush(self):
brush = getattr(self, "_background_brush")
if brush is None:
brush = getattr(self.scene(), "defaultItemBrush", Qt.NoBrush)
return QBrush(brush)
backgroundBrush = pyqtProperty(
"QBrush", fget=backgroundBrush, fset=setBackgroundBrush,
doc="Background brush")
def __init__(self, parent, *args, **kwargs):
QGraphicsTextItem.__init__(self, *args)
GraphNode.__init__(self, **kwargs)
self._background_brush = None
self._rect = None
self.parent = parent
font = self.font()
font.setPointSize(10)
self.setFont(font)
self.droplet = GraphicsDroplet(-5, 0, 10, 10, self)
self.droplet.setPos(self.rect().center().x(), self.rect().height())
self.document().contentsChanged.connect(self.update_contents)
self.isOpen = True
self.setFlag(QGraphicsItem.ItemIsSelectable, True)
def setHtml(self, html):
return super().setHtml("<body>" + html + "</body>")
def update_contents(self):
self.setTextWidth(-1)
self.setTextWidth(self.document().idealWidth())
self.droplet.setPos(self.rect().center().x(), self.rect().height())
self.droplet.setVisible(bool(self.branches))
def set_rect(self, rect):
self.prepareGeometryChange()
rect = QRectF() if rect is None else rect
self._rect = rect
self.update_contents()
self.update()
def shape(self):
path = QPainterPath()
path.addRect(self.boundingRect())
return path
def rect(self):
if getattr(self, "_rect", QRectF()).isValid():
return self._rect
else:
return QRectF(QPointF(0, 0), self.document().size()) | \
getattr(self, "_rect", QRectF(0, 0, 1, 1))
def boundingRect(self):
return self._rect if getattr(self, "_rect", QRectF()).isValid() \
else super().boundingRect()
@property
def branches(self):
return [edge.node2 for edge in self.graph_edges() if edge.node1 is self]
def paint(self, painter, option, widget=0):
painter.save()
painter.setBrush(self.backgroundBrush)
painter.setPen(QPen(Qt.gray))
rect = self.rect()
painter.drawRoundedRect(rect, 4, 4)
painter.restore()
painter.setClipRect(rect)
return QGraphicsTextItem.paint(self, painter, option, widget)
class GraphicsNode(TextTreeNode):
def graph_traverse_bf(self):
visited = set()
queue = list(self)
while queue:
node = queue.pop(0)
if node not in visited:
yield node
visited.add(node)
if node.isOpen:
queue.extend(list(node))
def set_open(self, do_open):
self.isOpen = do_open
for node in self.graph_traverse_bf():
if node is not self:
node.setVisible(do_open)
def itemChange(self, change, value):
if change in [QGraphicsItem.ItemPositionHasChanged,
QGraphicsItem.ItemVisibleHasChanged]:
self.update_edge()
return super().itemChange(change, value)
# noinspection PyCallByClass,PyTypeChecker
def update_edge(self):
for edge in self.graph_edges():
if edge.node1 is self:
QTimer.singleShot(0, edge.update_ends)
elif edge.node2 is self:
edge.setVisible(self.isVisible())
def edge_in_point(self, edge):
return edge.mapFromItem(
self, QPointF(self.rect().center().x(), self.rect().y()))
def edge_out_point(self, edge):
return edge.mapFromItem(self.droplet, self.droplet.rect().center())
def paint(self, painter, option, widget=0):
if self.isSelected():
option.state ^= QStyle.State_Selected
if self.isSelected():
rect = self.rect()
painter.save()
painter.setBrush(QBrush(QColor(125, 162, 206, 192)))
painter.drawRoundedRect(rect.adjusted(-4, -4, 4, 4), 10, 10)
painter.restore()
super().paint(painter, option, widget)
def boundingRect(self):
return super().boundingRect().adjusted(-5, -5, 5, 5)
class GraphicsEdge(QGraphicsLineItem, GraphEdge):
def __init__(self, *args, **kwargs):
QGraphicsLineItem.__init__(self, *args)
GraphEdge.__init__(self, **kwargs)
self.setZValue(-30)
def update_ends(self):
try:
self.prepareGeometryChange()
self.setLine(QLineF(self.node1.edge_out_point(self),
self.node2.edge_in_point(self)))
except RuntimeError: # this gets called through QTimer.singleShot
# and might already be deleted by Qt
pass
class TreeGraphicsView(QGraphicsView):
resized = pyqtSignal(QSize, name="resized")
def __init__(self, scene, *args):
super().__init__(scene, *args)
self.viewport().setMouseTracking(True)
self.setFocusPolicy(Qt.WheelFocus)
self.setRenderHint(QPainter.Antialiasing)
self.setRenderHint(QPainter.TextAntialiasing)
def resizeEvent(self, event):
super().resizeEvent(event)
self.resized.emit(self.size())
class TreeGraphicsScene(QGraphicsScene):
_HSPACING = 10
_VSPACING = 10
def __init__(self, master, *args):
super().__init__(*args)
self.master = master
self.nodeList = []
self.edgeList = []
self.gx = self.gy = 10
def fix_pos(self, node=None, x=10, y=10):
self.gx, self.gy = x, y
if not node:
if self.nodes():
node = [node for node in self.nodes() if not node.parent][0]
else:
return
if not x or not y:
x, y = self._HSPACING, self._VSPACING
self._fix_pos(node, x, y)
self.setSceneRect(QRectF(0, 0, self.gx, self.gy).adjusted(-10, -10, 100, 100))
self.update()
def _fix_pos(self, node, x, y):
"""Fix the position of the tree stemming from the given node."""
def brect(node):
"""Get the bounding box of the parent rect and all its children."""
return node.boundingRect() | node.childrenBoundingRect()
if node.branches and node.isOpen:
for n in node.branches:
x, _ = self._fix_pos(n, x, y + self._VSPACING + brect(node).height())
x = (node.branches[0].pos().x() + node.branches[-1].pos().x()) / 2
node.setPos(x, y)
for e in node.graph_edges():
e.update_ends()
else:
node.setPos(self.gx, y)
self.gx += self._HSPACING + brect(node).width()
x += self._HSPACING + brect(node).width()
self.gy = max(y, self.gy)
return x, y
def mouseMoveEvent(self, event):
return QGraphicsScene.mouseMoveEvent(self, event)
def mousePressEvent(self, event):
return QGraphicsScene.mousePressEvent(self, event)
def edges(self):
return [item for item in self.items() if isinstance(item, GraphEdge)]
def nodes(self):
return [item for item in self.items() if isinstance(item, GraphNode)]
class TreeNavigator(QGraphicsView):
def __init__(self, master_view, *_):
super().__init__()
self.master_view = master_view
self.setScene(self.master_view.scene())
self.scene().sceneRectChanged.connect(self.updateSceneRect)
self.master_view.resized.connect(self.update_view)
self.setRenderHint(QPainter.Antialiasing)
def mousePressEvent(self, event):
if event.buttons() & Qt.LeftButton:
self.master_view.centerOn(self.mapToScene(event.pos()))
self.update_view()
return super().mousePressEvenr(event)
def mouseMoveEvent(self, event):
if event.buttons() & Qt.LeftButton:
self.master_view.centerOn(self.mapToScene(event.pos()))
self.update_view()
return super().mouseMoveEvent(event)
def resizeEvent(self, event):
QGraphicsView.resizeEvent(self, event)
self.update_view()
# noinspection PyPep8Naming
def resizeView(self):
self.update_view()
def updateSceneRect(self, rect):
super().updateSceneRect(rect)
self.update_view()
def update_view(self, *_):
if self.scene():
self.fitInView(self.scene().sceneRect())
def paintEvent(self, event):
super().paintEvent(event)
painter = QPainter(self.viewport())
painter.setBrush(QColor(100, 100, 100, 100))
painter.setRenderHints(self.renderHints())
painter.drawPolygon(self.viewPolygon())
# noinspection PyPep8Naming
def viewPolygon(self):
return self.mapFromScene(
self.master_view.mapToScene(self.master_view.viewport().rect()))
class OWTreeViewer2D(OWWidget, openclass=True):
zoom = Setting(5)
line_width_method = Setting(2)
max_tree_depth = Setting(0)
max_node_width = Setting(150)
_VSPACING = 5
_HSPACING = 5
_TOOLTIPS_ENABLED = True
_DEF_NODE_WIDTH = 24
_DEF_NODE_HEIGHT = 20
graph_name = "scene" # QGraphicsScene (TreeGraphicsScene)
def __init__(self):
super().__init__()
self.selected_node = None
self.root_node = None
self.model = None
box = gui.vBox(
self.controlArea, 'Tree',
sizePolicy=QSizePolicy(QSizePolicy.Minimum, QSizePolicy.Fixed))
self.infolabel = gui.widgetLabel(box, 'No tree.')
layout = QFormLayout()
layout.setFieldGrowthPolicy(layout.ExpandingFieldsGrow)
box = self.display_box = gui.widgetBox(self.controlArea, "Display",
orientation=layout)
layout.addRow(
"Zoom: ",
gui.hSlider(box, self, 'zoom',
minValue=1, maxValue=10, step=1, ticks=False,
callback=self.toggle_zoom_slider,
createLabel=False, addToLayout=False))
layout.addRow(
"Width: ",
gui.hSlider(box, self, 'max_node_width',
minValue=50, maxValue=200, step=1, ticks=False,
callback=self.toggle_node_size,
createLabel=False, addToLayout=False))
policy = QSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.Fixed)
layout.addRow(
"Depth: ",
gui.comboBox(box, self, 'max_tree_depth',
items=["Unlimited"] + [
f"{x} levels" for x in range(2, 10)],
addToLayout=False, sendSelectedValue=False,
callback=self.toggle_tree_depth, sizePolicy=policy))
layout.addRow(
"Edge width: ",
gui.comboBox(box, self, 'line_width_method',
items=['Fixed', 'Relative to root',
'Relative to parent'],
addToLayout=False,
callback=self.toggle_line_width, sizePolicy=policy))
gui.rubber(self.controlArea)
self.scene = TreeGraphicsScene(self)
self.scene_view = TreeGraphicsView(self.scene)
self.scene_view.setStyleSheet("""QToolTip { padding: 3px;
border: 1px solid #C0C0C0;
}""")
self.scene_view.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
self.mainArea.layout().addWidget(self.scene_view)
self.toggle_zoom_slider()
self.scene.selectionChanged.connect(self.update_selection)
def send_report(self):
from AnyQt.QtSvg import QSvgGenerator
if self.model:
self.reportSection("Tree")
_, filefn = self.getUniqueImageName(ext=".svg")
svg = QSvgGenerator()
svg.setFileName(filefn)
ssize = self.scene.sceneRect().size()
w, h = ssize.width(), ssize.height()
fact = 600 / w
svg.setSize(QSize(600, h * fact))
painter = QPainter()
painter.begin(svg)
self.scene.render(painter)
painter.end()
def toggle_zoom_slider(self):
k = 0.0028 * (self.zoom ** 2) + 0.2583 * self.zoom + 1.1389
self.scene_view.setTransform(QTransform().scale(k / 2, k / 2))
self.scene.update()
def toggle_tree_depth(self):
self.walkupdate(self.root_node)
self.scene.fix_pos(self.root_node, 10, 10)
self.scene.update()
def toggle_line_width(self):
if self.root_node is None:
return
tree_adapter = self.root_node.tree_adapter
root_instances = tree_adapter.num_samples(self.root_node.node_inst)
width = 3
OFFSET = 0.20
for edge in self.scene.edges():
num_inst = tree_adapter.num_samples(edge.node2.node_inst)
if self.line_width_method == 1:
width = 8 * num_inst / root_instances + OFFSET
elif self.line_width_method == 2:
width = 8 * num_inst / tree_adapter.num_samples(
edge.node1.node_inst) + OFFSET
edge.setPen(QPen(Qt.gray, width, Qt.SolidLine, Qt.RoundCap))
self.scene.update()
def toggle_node_size(self):
self.set_node_info()
self.scene.update()
self.scene_view.repaint()
def toggle_navigator(self):
self.nav_widget.setHidden(not self.nav_widget.isHidden())
def activate_loaded_settings(self):
if not self.model:
return
self.rescale_tree()
self.scene.fix_pos(self.root_node, 10, 10)
self.scene.update()
self.toggle_tree_depth()
self.toggle_line_width()
def clear_scene(self):
self.scene.clear()
self.scene.setSceneRect(QRectF())
def setup_scene(self):
if self.root_node is not None:
self.scene.fix_pos(self.root_node, self._HSPACING, self._VSPACING)
self.activate_loaded_settings()
self.scene_view.centerOn(self.root_node.x(), self.root_node.y())
self.update_node_tooltips()
self.scene.update()
def walkupdate(self, node, level=0):
if not node:
return
if self.max_tree_depth and self.max_tree_depth < level + 1:
node.set_open(False)
return
else:
node.set_open(True)
for n in node.branches:
self.walkupdate(n, level + 1)
def update_node_tooltips(self):
for node in self.scene.nodes():
node.setToolTip(self.node_tooltip(node) if self._TOOLTIPS_ENABLED
else "")
def node_tooltip(self, tree):
return "tree node"
def rescale_tree(self):
node_height = self._DEF_NODE_HEIGHT
node_width = self._DEF_NODE_WIDTH
for r in self.scene.nodeList:
r.set_rect(r.rect().x(), r.rect().y(), node_width, node_height)
self.scene.fix_pos()
def update_selection(self):
self.selected_node = (self.scene.selectedItems() + [None])[0]
# self.centerNodeButton.setDisabled(not self.selected_node)
# self.send("Data", self.selectedNode.tree.examples if self.selectedNode
# else None)
|
