285 lines
8.9 KiB
Python
285 lines
8.9 KiB
Python
import sys
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from abc import abstractmethod
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from enum import Enum
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from typing import List, Dict, Tuple
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import networkx as nx
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from PyQt5.QtCore import QPointF, QRectF, Qt, pyqtSignal
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from PyQt5.QtGui import QFont, QPainterPath, QPen, QPainter, QMouseEvent
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from PyQt5.QtWidgets import QGraphicsItem, QGraphicsView, QApplication, QGraphicsScene
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from graph.DataType import Point, Line
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class PresentNodeType(Enum):
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PresentNode = 0,
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ConnectionNode = 1,
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class GraphNode:
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@abstractmethod
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def node_type(self) -> PresentNodeType:
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raise NotImplementedError("node_type")
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@abstractmethod
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def highlight(self, flag: bool):
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raise NotImplementedError("highlight")
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@abstractmethod
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def is_highlighted(self) -> bool:
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raise NotImplementedError("is_highlighted")
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@abstractmethod
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def boundingRect(self) -> QRectF:
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raise NotImplementedError("boundingRect")
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@abstractmethod
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def pos(self) -> QPointF:
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raise NotImplementedError("pos")
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class PresentNode(QGraphicsItem, GraphNode):
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def __init__(self, name: str, font: QFont, parent):
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QGraphicsItem.__init__(self, parent)
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self.node_name = name
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self.__is_highlight_mark = False
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self.__font_bind = font
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self.__sibling_list = []
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self.setZValue(10)
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pass
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def sibling_append(self, node: 'PresentNode'):
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if node not in self.__sibling_list:
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self.__sibling_list.append(node)
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pass
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pass
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def sibling_nodes(self) -> List['PresentNode']:
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return self.__sibling_list
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def node_type(self) -> PresentNodeType:
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return PresentNodeType.PresentNode
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def highlight(self, flag: bool):
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self.__is_highlight_mark = flag
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pass
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def is_highlighted(self) -> bool:
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return self.__is_highlight_mark
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pass
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def boundingRect(self) -> QRectF:
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width_x = self.__font_bind.pixelSize() * (len(self.node_name)+1)
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height_x = self.__font_bind.pixelSize()
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return QRectF(0, 0, width_x + 10, height_x + 10)
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pass
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def paint(self, painter, option, widget = ...):
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outline = self.boundingRect()
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path_icon = QPainterPath()
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path_icon.lineTo(outline.height()/2 - 5, outline.height() -5)
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path_icon.lineTo(outline.height()/2, outline.height()/2)
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path_icon.lineTo(outline.height() - 5, outline.height()/2 - 5)
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path_icon.lineTo(0, 0)
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painter.save()
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painter.setRenderHint(QPainter.Antialiasing)
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painter.drawRect(outline)
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if self.__is_highlight_mark:
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brush = Qt.red
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painter.setPen(Qt.red)
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else:
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brush = Qt.black
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painter.setPen(Qt.black)
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pass
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painter.fillPath(path_icon, brush)
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painter.translate(outline.height(), 5)
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painter.drawText(outline, self.node_name)
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painter.restore()
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pass
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class ConnectionNode(QGraphicsItem, GraphNode):
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def __init__(self, p0: GraphNode, p1: GraphNode, parent):
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QGraphicsItem.__init__(self, parent)
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self.__highlight_mark = False
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self.__point0 = p0
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self.__point1 = p1
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self.__outline = QRectF()
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self.setZValue(1)
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pass
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def node_type(self) -> PresentNodeType:
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return PresentNodeType.ConnectionNode
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def highlight(self, flag: bool):
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self.__highlight_mark = flag
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pass
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def is_highlighted(self) -> bool:
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return self.__highlight_mark
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pass
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def relayout_exec(self):
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start_pos = self.__point0.pos()
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end_pos = self.__point1.pos()
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start_x = min(start_pos.x(), end_pos.x())
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start_y = min(start_pos.y(), end_pos.y())
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end_x = max(start_pos.x(), end_pos.x())
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end_y = max(start_pos.y(), end_pos.y())
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self.setPos(QPointF(start_x, start_y))
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self.__outline = QRectF(0, 0, end_x - start_x, end_y - start_y)
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pass
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def boundingRect(self):
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return self.__outline
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pass
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def paint(self, painter, option, widget = ...):
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start_pos = self.__point0.pos()
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end_pos = self.__point1.pos()
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outline = self.boundingRect()
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painter.save()
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painter.setRenderHint(QPainter.Antialiasing)
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if self.__highlight_mark:
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pen = QPen(Qt.red)
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else:
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pen = QPen(Qt.lightGray)
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pen.setWidthF(3)
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painter.setPen(pen)
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if start_pos.y() < end_pos.y():
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if start_pos.x() < end_pos.x():
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painter.drawLine(outline.topLeft(), outline.bottomRight())
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else:
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painter.drawLine(outline.topRight(), outline.bottomLeft())
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else:
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if start_pos.x() < end_pos.x():
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painter.drawLine(outline.bottomLeft(), outline.topRight())
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else:
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painter.drawLine(outline.topLeft(), outline.bottomRight())
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painter.restore()
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pass
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class UDGPresent(QGraphicsView):
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node_clicked = pyqtSignal(str)
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def __init__(self, parent):
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QGraphicsView.__init__(self, parent)
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self.__highlight_nodes: List[GraphNode] = []
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self.node_set: Dict[str, GraphNode] = {}
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self.__layout_graph = nx.Graph()
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self.__scene_bind = QGraphicsScene(self)
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self.setScene(self.__scene_bind)
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font = QFont()
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font.setPixelSize(20)
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self.setFont(font)
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pass
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def rebuild_from_edges(self, line_set: List[Line]):
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self.node_set.clear()
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edge_set: Dict[str, Tuple[GraphNode, GraphNode]] = {}
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for line in line_set:
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start_node = line.points()[0]
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if start_node.point_name not in self.node_set:
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self.node_set[start_node.point_name] = PresentNode(start_node.point_name, self.font(), None)
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pass
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self.__layout_graph.add_node(start_node.point_name)
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end_node = line.points()[1]
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if start_node.point_name == end_node.point_name:
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continue
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if end_node.point_name not in self.node_set:
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self.node_set[end_node.point_name] = PresentNode(end_node.point_name, self.font(), None)
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pass
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self.__layout_graph.add_node(end_node.point_name)
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self.__layout_graph.add_edge(start_node.point_name, end_node.point_name)
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start_force_point: PresentNode = self.node_set[start_node.point_name]
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other_force_point: PresentNode = self.node_set[end_node.point_name]
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if other_force_point not in start_force_point.sibling_nodes():
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start_force_point.sibling_append(other_force_point)
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if start_force_point not in other_force_point.sibling_nodes():
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other_force_point.sibling_append(start_force_point)
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pass
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pos_map = nx.spring_layout(self.__layout_graph)
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scala_value:float = 0
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for name in pos_map:
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primitive_pos = pos_map[name]
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target_gnode: PresentNode = self.node_set[name]
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sibling_nodes = target_gnode.sibling_nodes()
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for sib in sibling_nodes:
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sib_primitive_pos = pos_map[sib.node_name]
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prim_x_span = primitive_pos[0] - sib_primitive_pos[0]
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prim_y_span = primitive_pos[1] - sib_primitive_pos[1]
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target_rect = target_gnode.boundingRect()
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scala_value = max(scala_value, target_rect.width()/prim_x_span)
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scala_value = max(scala_value, target_rect.height()/prim_y_span)
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pass
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pass
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for name in pos_map:
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primitive_pos = pos_map[name]
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target_gnode: PresentNode = self.node_set[name]
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target_gnode.setPos(primitive_pos[0] * scala_value, primitive_pos[1] * scala_value)
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self.__scene_bind.addItem(target_gnode)
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pass
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for edge in nx.edges(self.__layout_graph):
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edge_start = edge[0]
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edge_end = edge[1]
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node_one = self.node_set[edge_start]
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node_two = self.node_set[edge_end]
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connection = ConnectionNode(node_one, node_two, None)
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self.scene().addItem(connection)
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connection.relayout_exec()
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pass
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pass
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def mousePressEvent(self, event: QMouseEvent):
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QGraphicsView.mousePressEvent(self, event)
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if event.button() == Qt.MouseButton.LeftButton:
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item: GraphNode = self.itemAt(event.pos())
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if item.node_type() == PresentNodeType.PresentNode:
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vnode: PresentNode = item
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self.node_clicked.emit(vnode.node_name)
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print(vnode.node_name)
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pass
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pass
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pass
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if __name__ == "__main__":
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app = QApplication(sys.argv)
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view = UDGPresent(None)
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view.show()
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list_in = [
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Line(Point('a中古'), Point('b')),
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Line(Point('a中古'), Point('c')),
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Line(Point('a中古'), Point('d')),
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]
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view.rebuild_from_edges(list_in)
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app.exec() |