256 lines
8.8 KiB
Python
256 lines
8.8 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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'''
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Created on 2017年12月28日
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@author: Irony."[讽刺]
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@site: https://pyqt5.com , https://github.com/892768447
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@email: 892768447@qq.com
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@file: charts.bar.BarStack
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@description: like http://echarts.baidu.com/demo.html#bar-stack
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'''
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from random import randint
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import sys
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from PyQt5.QtChart import QChartView, QChart, QBarSeries, QBarSet, QBarCategoryAxis
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from PyQt5.QtCore import Qt, QPointF, QRectF, QPoint
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from PyQt5.QtGui import QPainter, QPen
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from PyQt5.QtWidgets import QApplication, QGraphicsLineItem, QWidget, \
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QHBoxLayout, QLabel, QVBoxLayout, QGraphicsProxyWidget
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__Author__ = "By: Irony.\"[讽刺]\nQQ: 892768447\nEmail: 892768447@qq.com"
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__Copyright__ = "Copyright (c) 2017 Irony.\"[讽刺]"
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__Version__ = "Version 1.0"
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class ToolTipItem(QWidget):
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def __init__(self, color, text, parent=None):
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super(ToolTipItem, self).__init__(parent)
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layout = QHBoxLayout(self)
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layout.setContentsMargins(0, 0, 0, 0)
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clabel = QLabel(self)
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clabel.setMinimumSize(12, 12)
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clabel.setMaximumSize(12, 12)
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clabel.setStyleSheet("border-radius:6px;background: rgba(%s,%s,%s,%s);" % (
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color.red(), color.green(), color.blue(), color.alpha()))
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layout.addWidget(clabel)
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self.textLabel = QLabel(text, self, styleSheet="color:white;")
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layout.addWidget(self.textLabel)
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def setText(self, text):
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self.textLabel.setText(text)
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class ToolTipWidget(QWidget):
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Cache = {}
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def __init__(self, *args, **kwargs):
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super(ToolTipWidget, self).__init__(*args, **kwargs)
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self.setAttribute(Qt.WA_StyledBackground, True)
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self.setStyleSheet(
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"ToolTipWidget{background: rgba(50, 50, 50, 100);}")
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layout = QVBoxLayout(self)
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self.titleLabel = QLabel(self, styleSheet="color:white;")
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layout.addWidget(self.titleLabel)
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def updateUi(self, title, bars):
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self.titleLabel.setText(title)
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for bar, value in bars:
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if bar not in self.Cache:
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item = ToolTipItem(
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bar.color(),
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(bar.label() or "-") + ":" + str(value), self)
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self.layout().addWidget(item)
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self.Cache[bar] = item
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else:
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self.Cache[bar].setText(
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(bar.label() or "-") + ":" + str(value))
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brush = bar.brush()
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color = brush.color()
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self.Cache[bar].setVisible(color.alphaF() == 1.0) # 隐藏那些不可用的项
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self.adjustSize() # 调整大小
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class GraphicsProxyWidget(QGraphicsProxyWidget):
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def __init__(self, *args, **kwargs):
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super(GraphicsProxyWidget, self).__init__(*args, **kwargs)
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self.setZValue(999)
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self.tipWidget = ToolTipWidget()
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self.setWidget(self.tipWidget)
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self.hide()
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def width(self):
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return self.size().width()
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def height(self):
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return self.size().height()
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def show(self, title, bars, pos):
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self.setGeometry(QRectF(pos, self.size()))
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self.tipWidget.updateUi(title, bars)
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super(GraphicsProxyWidget, self).show()
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class ChartView(QChartView):
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def __init__(self, *args, **kwargs):
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super(ChartView, self).__init__(*args, **kwargs)
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self.resize(800, 600)
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self.setRenderHint(QPainter.Antialiasing) # 抗锯齿
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self.initChart()
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# 提示widget
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self.toolTipWidget = GraphicsProxyWidget(self._chart)
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# line 宽度需要调整
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self.lineItem = QGraphicsLineItem(self._chart)
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pen = QPen(Qt.gray)
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self.lineItem.setPen(pen)
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self.lineItem.setZValue(998)
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self.lineItem.hide()
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# 一些固定计算，减少mouseMoveEvent中的计算量
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# 获取x和y轴的最小最大值
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axisX, axisY = self._chart.axisX(), self._chart.axisY()
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self.category_len = len(axisX.categories())
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self.min_x, self.max_x = -0.5, self.category_len - 0.5
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self.min_y, self.max_y = axisY.min(), axisY.max()
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# 坐标系中左上角顶点
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self.point_top = self._chart.mapToPosition(
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QPointF(self.min_x, self.max_y))
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def mouseMoveEvent(self, event):
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super(ChartView, self).mouseMoveEvent(event)
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pos = event.pos()
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# 把鼠标位置所在点转换为对应的xy值
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x = self._chart.mapToValue(pos).x()
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y = self._chart.mapToValue(pos).y()
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index = round(x)
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# 得到在坐标系中的所有bar的类型和点
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serie = self._chart.series()[0]
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bars = [(bar, bar.at(index))
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for bar in serie.barSets() if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y]
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# print(bars)
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if bars:
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right_top = self._chart.mapToPosition(
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QPointF(self.max_x, self.max_y))
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# 等分距离比例
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step_x = round(
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(right_top.x() - self.point_top.x()) / self.category_len)
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posx = self._chart.mapToPosition(QPointF(x, self.min_y))
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self.lineItem.setLine(posx.x(), self.point_top.y(),
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posx.x(), posx.y())
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self.lineItem.show()
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try:
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title = self.categories[index]
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except:
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title = ""
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t_width = self.toolTipWidget.width()
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t_height = self.toolTipWidget.height()
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# 如果鼠标位置离右侧的距离小于tip宽度
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x = pos.x() - t_width if self.width() - \
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pos.x() - 20 < t_width else pos.x()
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# 如果鼠标位置离底部的高度小于tip高度
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y = pos.y() - t_height if self.height() - \
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pos.y() - 20 < t_height else pos.y()
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self.toolTipWidget.show(
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title, bars, QPoint(x, y))
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else:
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self.toolTipWidget.hide()
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self.lineItem.hide()
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def handleMarkerClicked(self):
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marker = self.sender() # 信号发送者
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if not marker:
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return
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bar = marker.barset()
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if not bar:
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return
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# bar透明度
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brush = bar.brush()
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color = brush.color()
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alpha = 0.0 if color.alphaF() == 1.0 else 1.0
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color.setAlphaF(alpha)
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brush.setColor(color)
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bar.setBrush(brush)
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# marker
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brush = marker.labelBrush()
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color = brush.color()
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alpha = 0.4 if color.alphaF() == 1.0 else 1.0
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# 设置label的透明度
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color.setAlphaF(alpha)
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brush.setColor(color)
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marker.setLabelBrush(brush)
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# 设置marker的透明度
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brush = marker.brush()
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color = brush.color()
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color.setAlphaF(alpha)
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brush.setColor(color)
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marker.setBrush(brush)
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def handleMarkerHovered(self, status):
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# 设置bar的画笔宽度
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marker = self.sender() # 信号发送者
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if not marker:
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return
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bar = marker.barset()
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if not bar:
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return
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pen = bar.pen()
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if not pen:
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return
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pen.setWidth(pen.width() + (1 if status else -1))
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bar.setPen(pen)
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def handleBarHoverd(self, status, index):
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# 设置bar的画笔宽度
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bar = self.sender() # 信号发送者
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pen = bar.pen()
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if not pen:
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return
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pen.setWidth(pen.width() + (1 if status else -1))
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bar.setPen(pen)
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def initChart(self):
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self._chart = QChart(title="柱状图堆叠")
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self._chart.setAcceptHoverEvents(True)
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# Series动画
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self._chart.setAnimationOptions(QChart.SeriesAnimations)
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self.categories = ["周一", "周二", "周三", "周四", "周五", "周六", "周日"]
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names = ["邮件营销", "联盟广告", "视频广告", "直接访问", "搜索引擎"]
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series = QBarSeries(self._chart)
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for name in names:
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bar = QBarSet(name)
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# 随机数据
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for _ in range(7):
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bar.append(randint(0, 10))
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series.append(bar)
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bar.hovered.connect(self.handleBarHoverd) # 鼠标悬停
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self._chart.addSeries(series)
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self._chart.createDefaultAxes() # 创建默认的轴
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# x轴
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axis_x = QBarCategoryAxis(self._chart)
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axis_x.append(self.categories)
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self._chart.setAxisX(axis_x, series)
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# chart的图例
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legend = self._chart.legend()
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legend.setVisible(True)
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# 遍历图例上的标记并绑定信号
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for marker in legend.markers():
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# 点击事件
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marker.clicked.connect(self.handleMarkerClicked)
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# 鼠标悬停事件
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marker.hovered.connect(self.handleMarkerHovered)
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self.setChart(self._chart)
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if __name__ == "__main__":
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app = QApplication(sys.argv)
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view = ChartView()
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view.show()
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sys.exit(app.exec_())
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