simple BarStack

PyQtChart练习/README.md

@@ -11,3 +11,4 @@ like [百度 echarts](http://echarts.baidu.com/demo.htmlhttp://echarts.baidu.com
 
 ### [2.charts](charts/)
  - [2.1 折线图](charts/line)
+ - [2.2 柱状图](charts/bar)

PyQtChart练习/charts/README.md

@@ -6,3 +6,6 @@
 
 ### [1.折线图](line/)
  - [1.1 折线图堆叠](line/LineStack.py)
+
+### [2.柱状图](bar/)
+ - [2.1 柱状图堆叠](bar/BarStack.py)

PyQtChart练习/charts/bar/BarStack.py

@@ -10,15 +10,14 @@ Created on 2017年12月28日
 @description: like http://echarts.baidu.com/demo.html#bar-stack
 '''
 
+from random import randint
 import sys
 
-from PyQt5.QtChart import QChartView, QChart, QLineSeries, QLegend,\
-    QCategoryAxis, QBarSeries, QBarSet, QBarCategoryAxis
+from PyQt5.QtChart import QChartView, QChart, QBarSeries, QBarSet, QBarCategoryAxis
 from PyQt5.QtCore import Qt, QPointF, QRectF, QPoint
 from PyQt5.QtGui import QPainter, QPen
 from PyQt5.QtWidgets import QApplication, QGraphicsLineItem, QWidget, \
     QHBoxLayout, QLabel, QVBoxLayout, QGraphicsProxyWidget
-from random import randint
 
 
 __Author__ = "By: Irony.\"[讽刺]\nQQ: 892768447\nEmail: 892768447@qq.com"
@@ -58,18 +57,22 @@ class ToolTipWidget(QWidget):
         self.titleLabel = QLabel(self, styleSheet="color:white;")
         layout.addWidget(self.titleLabel)
 
-    def updateUi(self, title, points):
+    def updateUi(self, title, bars):
         self.titleLabel.setText(title)
-        for serie, point in points:
-            if serie not in self.Cache:
+        for bar, value in bars:
+            if bar not in self.Cache:
                 item = ToolTipItem(
-                    serie.color(),
-                    (serie.name() or "-") + ":" + str(point.y()), self)
+                    bar.color(),
+                    (bar.label() or "-") + ":" + str(value), self)
                 self.layout().addWidget(item)
-                self.Cache[serie] = item
+                self.Cache[bar] = item
             else:
-                self.Cache[serie].setText(
-                    (serie.name() or "-") + ":" + str(point.y()))
+                self.Cache[bar].setText(
+                    (bar.label() or "-") + ":" + str(value))
+            brush = bar.brush()
+            color = brush.color()
+            self.Cache[bar].setVisible(color.alphaF() == 1.0)  # 隐藏那些不可用的项
+        self.adjustSize()  # 调整大小
 
 
 class GraphicsProxyWidget(QGraphicsProxyWidget):
@@ -87,9 +90,9 @@ class GraphicsProxyWidget(QGraphicsProxyWidget):
     def height(self):
         return self.size().height()
 
-    def show(self, title, points, pos):
+    def show(self, title, bars, pos):
         self.setGeometry(QRectF(pos, self.size()))
-        self.tipWidget.updateUi(title, points)
+        self.tipWidget.updateUi(title, bars)
         super(GraphicsProxyWidget, self).show()
 
 
@@ -104,26 +107,22 @@ class ChartView(QChartView):
         # 提示widget
         self.toolTipWidget = GraphicsProxyWidget(self._chart)
 
-        # line
+        # line 宽度需要调整
         self.lineItem = QGraphicsLineItem(self._chart)
         pen = QPen(Qt.gray)
-        pen.setWidth(1)
         self.lineItem.setPen(pen)
         self.lineItem.setZValue(998)
         self.lineItem.hide()
-    '''
+
         # 一些固定计算，减少mouseMoveEvent中的计算量
         # 获取x和y轴的最小最大值
         axisX, axisY = self._chart.axisX(), self._chart.axisY()
-        self.min_x, self.max_x = axisX.min(), axisX.max()
+        self.category_len = len(axisX.categories())
+        self.min_x, self.max_x = -0.5, self.category_len - 0.5
         self.min_y, self.max_y = axisY.min(), axisY.max()
         # 坐标系中左上角顶点
         self.point_top = self._chart.mapToPosition(
             QPointF(self.min_x, self.max_y))
-        # 坐标原点坐标
-        self.point_bottom = self._chart.mapToPosition(
-            QPointF(self.min_x, self.min_y))
-        self.step_x = (self.max_x - self.min_x) / (axisX.tickCount() - 1)
 
     def mouseMoveEvent(self, event):
         super(ChartView, self).mouseMoveEvent(event)
@@ -131,18 +130,24 @@ class ChartView(QChartView):
         # 把鼠标位置所在点转换为对应的xy值
         x = self._chart.mapToValue(pos).x()
         y = self._chart.mapToValue(pos).y()
-        index = round((x - self.min_x) / self.step_x)
-        # 得到在坐标系中的所有series的类型和点
-        points = [(serie, serie.at(index))
-                  for serie in self._chart.series() if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y]
-        if points:
-            pos_x = self._chart.mapToPosition(
-                QPointF(index * self.step_x + self.min_x, self.min_y))
-            self.lineItem.setLine(pos_x.x(), self.point_top.y(),
-                                  pos_x.x(), self.point_bottom.y())
+        index = round(x)
+        # 得到在坐标系中的所有bar的类型和点
+        serie = self._chart.series()[0]
+        bars = [(bar, bar.at(index))
+                for bar in serie.barSets() if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y]
+#         print(bars)
+        if bars:
+            right_top = self._chart.mapToPosition(
+                QPointF(self.max_x, self.max_y))
+            # 等分距离比例
+            step_x = round(
+                (right_top.x() - self.point_top.x()) / self.category_len)
+            posx = self._chart.mapToPosition(QPointF(x, self.min_y))
+            self.lineItem.setLine(posx.x(), self.point_top.y(),
+                                  posx.x(), posx.y())
             self.lineItem.show()
             try:
-                title = self.category[index]
+                title = self.categories[index]
             except:
                 title = ""
             t_width = self.toolTipWidget.width()
@@ -154,25 +159,30 @@ class ChartView(QChartView):
             y = pos.y() - t_height if self.height() - \
                 pos.y() - 20 < t_height else pos.y()
             self.toolTipWidget.show(
-                title, points, QPoint(x, y))
+                title, bars, QPoint(x, y))
         else:
             self.toolTipWidget.hide()
             self.lineItem.hide()
-    '''
 
     def handleMarkerClicked(self):
         marker = self.sender()  # 信号发送者
         if not marker:
             return
-        visible = not marker.series().isVisible()
-#         # 隐藏或显示series
-        marker.series().setVisible(visible)
-        marker.setVisible(True)  # 要保证marker一直显示
-        # 透明度
-        alpha = 1.0 if visible else 0.4
-        # 设置label的透明度
+        bar = marker.barset()
+        if not bar:
+            return
+        # bar透明度
+        brush = bar.brush()
+        color = brush.color()
+        alpha = 0.0 if color.alphaF() == 1.0 else 1.0
+        color.setAlphaF(alpha)
+        brush.setColor(color)
+        bar.setBrush(brush)
+        # marker
         brush = marker.labelBrush()
         color = brush.color()
+        alpha = 0.4 if color.alphaF() == 1.0 else 1.0
+        # 设置label的透明度
         color.setAlphaF(alpha)
         brush.setColor(color)
         marker.setLabelBrush(brush)
@@ -182,62 +192,54 @@ class ChartView(QChartView):
         color.setAlphaF(alpha)
         brush.setColor(color)
         marker.setBrush(brush)
-        # 设置画笔透明度
-        pen = marker.pen()
-        color = pen.color()
-        color.setAlphaF(alpha)
-        pen.setColor(color)
-        marker.setPen(pen)
 
     def handleMarkerHovered(self, status):
-        # 设置series的画笔宽度
+        # 设置bar的画笔宽度
         marker = self.sender()  # 信号发送者
         if not marker:
             return
-        series = marker.series()
-        if not series:
+        bar = marker.barset()
+        if not bar:
             return
-        pen = series.pen()
+        pen = bar.pen()
         if not pen:
             return
         pen.setWidth(pen.width() + (1 if status else -1))
-        series.setPen(pen)
+        bar.setPen(pen)
 
-    def handleSeriesHoverd(self, status,index,barset):
-        return print(status,index,barset)
-#         # 设置series的画笔宽度
-#         series = self.sender()  # 信号发送者
-#         pen = series.pen()
-#         if not pen:
-#             return
-#         pen.setWidth(pen.width() + (1 if state else -1))
-#         series.setPen(pen)
+    def handleBarHoverd(self, status, index):
+        # 设置bar的画笔宽度
+        bar = self.sender()  # 信号发送者
+        pen = bar.pen()
+        if not pen:
+            return
+        pen.setWidth(pen.width() + (1 if status else -1))
+        bar.setPen(pen)
 
     def initChart(self):
         self._chart = QChart(title="柱状图堆叠")
         self._chart.setAcceptHoverEvents(True)
         # Series动画
         self._chart.setAnimationOptions(QChart.SeriesAnimations)
-        categories = ["周一", "周二", "周三", "周四", "周五", "周六", "周日"]
-        names = ["邮件营销","联盟广告","视频广告","直接访问","搜索引擎"]
+        self.categories = ["周一", "周二", "周三", "周四", "周五", "周六", "周日"]
+        names = ["邮件营销", "联盟广告", "视频广告", "直接访问", "搜索引擎"]
         series = QBarSeries(self._chart)
         for name in names:
             bar = QBarSet(name)
-            #随机数据
+            # 随机数据
             for _ in range(7):
-                bar.append(randint(0,10))
+                bar.append(randint(0, 10))
             series.append(bar)
-#             series.hovered.connect(self.handleSeriesHoverd)  # 鼠标悬停
-            self._chart.addSeries(series)
+            bar.hovered.connect(self.handleBarHoverd)  # 鼠标悬停
+        self._chart.addSeries(series)
         self._chart.createDefaultAxes()  # 创建默认的轴
         # x轴
         axis_x = QBarCategoryAxis(self._chart)
-        axis_x.append(categories)
+        axis_x.append(self.categories)
         self._chart.setAxisX(axis_x, series)
         # chart的图例
         legend = self._chart.legend()
-        # 设置图例由Series来决定样式
-        legend.setMarkerShape(QLegend.MarkerShapeFromSeries)
+        legend.setVisible(True)
         # 遍历图例上的标记并绑定信号
         for marker in legend.markers():
             # 点击事件