python 使用Qt Designer时显示PySide2 QCharts

jgovgodb  于 2023-03-28  发布在  Python
关注(0)|答案(2)|浏览(367)

我也遇到了类似的问题：How to insert QChartView in form with Qt Designer?
所以我在Qt Designer中创建了我的UI的主窗口，我试图让一个QtChart显示在我的窗口中的一个选项卡中。我将.ui文件导入到一个python程序中，到目前为止，我可以让主窗口显示良好，但不是图表。我花了一天的大部分时间试图按照上面答案中列出的说明进行操作，但是到目前为止，我还不能将我的升级小部件正确导入到我的主程序中。我一直在想，部分原因是否是我试图在Python版本的Qt（即PySide 2）中做到这一点，而不是C++版本。
我尝试使用QWidget和推荐的QGraphicsView作为我的基础，将我的QChartView升级到，但到目前为止，每次尝试都给我一个错误，内容如下："QFormBuilder was unable to create a custom widget of the class 'QChartView'; defaulting to base class 'QWidget'."我做错了什么？
与链接的问题/答案状态一样，我将我的升级小部件设置为QChartView的“升级类名”和QtCHarts的“头文件”。下面是我的Python程序的基本代码（忽略我开始时奇怪的导入，因为这是我正在处理的一个单独的问题，除非我以这种方式格式化它们，否则我的程序将无法找到类导入）。
任何帮助将不胜感激！谢谢！

import sys
import PySide2.QtCore as Qt_Core
import PySide2.QtGui as Qt_Gui
import PySide2.QtWidgets as Qt_Widgets
import PySide2.QtUiTools as Qt_UiTools
import PySide2.QtCharts as Qt_Chart
from PySide2.QtCharts import QtCharts
import Pico_Image_Resources
import Chart_UI

# Having import issues with submodules.
# Need to explicitly import submodules.
QMainWindow = Qt_Widgets.QMainWindow
QApplication = Qt_Widgets.QApplication
QGraphicsView = Qt_Widgets.QGraphicsView
QUiLoader = Qt_UiTools.QUiLoader
QFile = Qt_Core.QFile
QStyleFactory = Qt_Widgets.QStyleFactory
QtCharts = Qt_Chart.QtCharts
QChartView = QtCharts.QChartView
QPainter = Qt_Gui.QPainter
#-----------------------------------------

class MainWindow(QMainWindow):

    def __init__(self, ui_file, parent=None):
        super(MainWindow, self).__init__(parent)
        ui_file = QFile(ui_file)
        ui_file.open(QFile.ReadOnly)
 
        chartUI = Chart_UI.generateChart()
        self.chart = QtCharts.QChart()

        """
        Code that defines my chart setup is here

        """
        
        loader = QUiLoader()
        self.window = loader.load(ui_file)
        QApplication.setStyle(QStyleFactory.create('Fusion'))
        ui_file.close()
      
        #Normal Way to set up 'ChartView'
        # self.chartView = QChartView(self.chart)

        self.chartView = self.window.findChild(QChartView, 'calibrationChart')
        self.chartView.setChart(self.chart)
        self.chartView.setRenderHint(QPainter.Antialiasing)

        self.window.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MainWindow('My_Main_Window.ui')
    sys.exit(app.exec_())

[编辑]：这是我正在加载的.ui文件代码，根据要求。它不是完整的文件，因为原始文件太长而无法发布，但它应该足以让您了解：

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <author></author>
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="enabled">
   <bool>true</bool>
  </property>
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>1280</width>
    <height>720</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>1280</width>
    <height>720</height>
   </size>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <property name="styleSheet">
   <string notr="true"/>
  </property>
  <property name="toolButtonStyle">
   <enum>Qt::ToolButtonFollowStyle</enum>
  </property>
  <widget class="QWidget" name="centralwidget">
   <property name="styleSheet">
    <string notr="true"/>
   </property>
   <widget class="QTabWidget" name="tabWidget">
    <property name="geometry">
     <rect>
      <x>400</x>
      <y>10</y>
      <width>871</width>
      <height>641</height>
     </rect>
    </property>
    <property name="font">
     <font>
      <pointsize>10</pointsize>
      <weight>75</weight>
      <bold>true</bold>
     </font>
    </property>
    <property name="focusPolicy">
     <enum>Qt::TabFocus</enum>
    </property>
    <property name="currentIndex">
     <number>0</number>
    </property>
    <widget class="QWidget" name="tabCalib">
     <property name="enabled">
      <bool>true</bool>
     </property>
     <attribute name="title">
      <string>Chart 1</string>
     </attribute>
     <widget class="QChartView" name="calibrationChart" native="true">
      <property name="geometry">
       <rect>
        <x>19</x>
        <y>19</y>
        <width>821</width>
        <height>571</height>
       </rect>
      </property>
     </widget>
    </widget>
    <widget class="QWidget" name="tabDynamic">
     <attribute name="title">
      <string>Chart 2</string>
     </attribute>
     <widget class="QGraphicsView" name="graphicsView_2">
      <property name="geometry">
       <rect>
        <x>10</x>
        <y>10</y>
        <width>861</width>
        <height>591</height>
       </rect>
      </property>
      <property name="frameShape">
       <enum>QFrame::StyledPanel</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Sunken</enum>
      </property>
      <property name="renderHints">
       <set>QPainter::Antialiasing|QPainter::TextAntialiasing</set>
      </property>
     </widget>
    </widget>
   </widget>
   <widget class="QWidget" name="verticalLayoutWidget">
    <property name="geometry">
     <rect>
      <x>20</x>
      <y>10</y>
      <width>361</width>
      <height>451</height>
     </rect>
    </property>
    <layout class="QVBoxLayout" name="verticalLayout">
     <property name="spacing">
      <number>10</number>
     </property>
     <property name="sizeConstraint">
      <enum>QLayout::SetDefaultConstraint</enum>
     </property>
     <property name="leftMargin">
      <number>0</number>
     </property>
     <item>
      <widget class="QLabel" name="label_20">
       <property name="minimumSize">
        <size>
         <width>0</width>
         <height>32</height>
        </size>
       </property>
       <property name="maximumSize">
        <size>
         <width>16777215</width>
         <height>32</height>
        </size>
       </property>
       <property name="font">
        <font>
         <family>Calibri</family>
         <pointsize>11</pointsize>
         <weight>75</weight>
         <bold>true</bold>
         <strikeout>false</strikeout>
        </font>
       </property>
       <property name="frameShape">
        <enum>QFrame::StyledPanel</enum>
       </property>
       <property name="frameShadow">
        <enum>QFrame::Plain</enum>
       </property>
       <property name="text">
        <string>Test Title Here</string>
       </property>
       <property name="alignment">
        <set>Qt::AlignCenter</set>
       </property>
       <property name="wordWrap">
        <bool>false</bool>
       </property>
      </widget>
     </item>
     <item>
      <widget class="QGroupBox" name="groupBox">
       <property name="title">
        <string>Please fill in the following data boxes:</string>
       </property>
       <widget class="QWidget" name="layoutWidget">
        <property name="geometry">
         <rect>
          <x>10</x>
          <y>40</y>
          <width>341</width>
          <height>271</height>
         </rect>
        </property>
        <layout class="QFormLayout" name="formLayout">
         <property name="labelAlignment">
          <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
         </property>
         <property name="horizontalSpacing">
          <number>10</number>
         </property>
         <property name="verticalSpacing">
          <number>10</number>
         </property>
         <item row="0" column="0">
          <widget class="QLabel" name="label_2">
           <property name="text">
            <string>Field One:</string>
           </property>
          </widget>
         </item>
         <item row="0" column="1">
          <widget class="QLineEdit" name="lineEdit_8"/>
         </item>
         <item row="1" column="0">
          <widget class="QLabel" name="label_3">
           <property name="text">
            <string>Field Two:</string>
           </property>
          </widget>
         </item>
         <item row="1" column="1">
          <widget class="QLineEdit" name="lineEdit"/>
         </item>
         <item row="2" column="0">
          <widget class="QLabel" name="label_4">
           <property name="text">
            <string>Field Three:</string>
           </property>
          </widget>
         </item>
         <item row="2" column="1">
          <widget class="QLineEdit" name="lineEdit_2"/>
         </item>
         <item row="4" column="0">
          <widget class="QLabel" name="label_5">
           <property name="text">
            <string>Field Five:</string>
           </property>
          </widget>
         </item>
         <item row="4" column="1">
          <widget class="QLineEdit" name="lineEdit_3"/>
         </item>
         <item row="5" column="0">
          <widget class="QLabel" name="label_6">
           <property name="text">
            <string>Field Six:</string>
           </property>
          </widget>
         </item>
         <item row="5" column="1">
          <widget class="QLineEdit" name="lineEdit_4"/>
         </item>
         <item row="6" column="0">
          <widget class="QLabel" name="label_7">
           <property name="text">
            <string>Selection One:</string>
           </property>
          </widget>
         </item>
         <item row="6" column="1">
          <widget class="QComboBox" name="comboBox">
           <property name="currentIndex">
            <number>3</number>
           </property>
           <item>
            <property name="text">
             <string>123</string>
            </property>
           </item>
           <item>
            <property name="text">
             <string>456</string>
            </property>
           </item>
           <item>
            <property name="text">
             <string>789</string>
            </property>
           </item>
          </widget>
         </item>
         <item row="7" column="0">
          <widget class="QLabel" name="label_8">
           <property name="text">
            <string>Selection Two:</string>
           </property>
          </widget>
         </item>
         <item row="7" column="1">
          <widget class="QComboBox" name="comboBox_2">
           <property name="currentIndex">
            <number>3</number>
           </property>
           <item>
            <property name="text">
             <string>123</string>
            </property>
           </item>
           <item>
            <property name="text">
             <string>456</string>
            </property>
           </item>
           <item>
            <property name="text">
             <string>789</string>
            </property>
           </item>
          </widget>
         </item>
         <item row="8" column="0">
          <widget class="QLabel" name="label_9">
           <property name="text">
            <string>Output:</string>
           </property>
          </widget>
         </item>
         <item row="8" column="1">
          <widget class="QLineEdit" name="lineEdit_7">
           <property name="enabled">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item row="3" column="0">
          <widget class="QLabel" name="label_21">
           <property name="text">
            <string>Field Four:</string>
           </property>
          </widget>
         </item>
         <item row="3" column="1">
          <widget class="QLineEdit" name="lineEdit_5">
           <property name="enabled">
            <bool>false</bool>
           </property>
           <property name="readOnly">
            <bool>true</bool>
           </property>
           <property name="clearButtonEnabled">
            <bool>false</bool>
           </property>
          </widget>
         </item>
        </layout>
       </widget>
      </widget>
     </item>
    </layout>
   </widget>
   <widget class="Line" name="line">
    <property name="geometry">
     <rect>
      <x>20</x>
      <y>470</y>
      <width>361</width>
      <height>21</height>
     </rect>
    </property>
    <property name="orientation">
     <enum>Qt::Horizontal</enum>
    </property>
   </widget>
   <widget class="QPushButton" name="pushButton">
    <property name="geometry">
     <rect>
      <x>140</x>
      <y>500</y>
      <width>111</width>
      <height>41</height>
     </rect>
    </property>
    <property name="font">
     <font>
      <family>Calibri</family>
      <pointsize>14</pointsize>
      <weight>75</weight>
      <bold>true</bold>
     </font>
    </property>
    <property name="styleSheet">
     <string notr="true">background-color: rgb(85, 255, 0)</string>
    </property>
    <property name="text">
     <string>START TEST</string>
    </property>
    <property name="checkable">
     <bool>false</bool>
    </property>
    <property name="checked">
     <bool>false</bool>
    </property>
    <property name="default">
     <bool>false</bool>
    </property>
    <property name="flat">
     <bool>false</bool>
    </property>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1280</width>
     <height>21</height>
    </rect>
   </property>
   <widget class="QMenu" name="menuFile">
    <property name="title">
     <string>File</string>
    </property>
    <addaction name="actionSettings"/>
    <addaction name="separator"/>
    <addaction name="actionClose"/>
   </widget>
   <widget class="QMenu" name="menuAbout">
    <property name="title">
     <string>About</string>
    </property>
   </widget>
   <addaction name="menuFile"/>
   <addaction name="menuAbout"/>
  </widget>
  <widget class="QStatusBar" name="statusbar">
   <property name="enabled">
    <bool>true</bool>
   </property>
   <property name="autoFillBackground">
    <bool>false</bool>
   </property>
   <property name="styleSheet">
    <string notr="true">background-color: rgb(0, 132, 203);</string>
   </property>
   <property name="sizeGripEnabled">
    <bool>true</bool>
   </property>
  </widget>
  <action name="actionSettings">
   <property name="text">
    <string>Settings</string>
   </property>
  </action>
  <action name="actionClose">
   <property name="text">
    <string>Close</string>
   </property>
  </action>
 </widget>
 <customwidgets>
  <customwidget>
   <class>QChartView</class>
   <extends>QWidget</extends>
   <header>QtCharts</header>
   <container>1</container>
  </customwidget>
 </customwidgets>
 <resources>
 </resources>
 <connections/>
</ui>
python

2条答案

按热度按时间
avkwfej4

avkwfej41#

QWidget作为容器：

在这种情况下，我不建议应用升级，因为它会使任务复杂化很多，但我将展示如何应用my other answer中所示的解决方案：使用QWidget作为. ui中的容器。
在这个例子中，我创建了一个.ui，其中包含几个组件，在你想要放置QChartView的地方，放置一个QWidget（为了使它可见，我设置了一个绿色的背景色）：

design.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>636</width>
    <height>480</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout" columnstretch="0,1">
    <item row="0" column="0">
     <widget class="QListWidget" name="listWidget"/>
    </item>
    <item row="1" column="0">
     <widget class="QTableWidget" name="tableWidget"/>
    </item>
    <item row="0" column="1" rowspan="2">
     <widget class="QWidget" name="widget" native="true">
      <property name="styleSheet">
       <string notr="true">background-color: rgb(138, 226, 52);</string>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>636</width>
     <height>24</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

那么逻辑很简单：通过objectName获取QWidget，在本例中是“widget”，然后在该widget中放置布局，然后通过布局将QChartView放置在widget中。

import random
import sys

from PySide2 import QtCore, QtGui, QtUiTools, QtWidgets
from PySide2.QtCharts import QtCharts

def ui_to_window(filename, parent=None):
    file = QtCore.QFile(filename)
    if not file.open(QtCore.QFile.ReadOnly):
        return
    loader = QtUiTools.QUiLoader()
    window = loader.load(file, parent)
    return window

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = ui_to_window("design.ui")
    window.widget.setContentsMargins(0, 0, 0, 0)
    lay = QtWidgets.QVBoxLayout(window.widget)
    lay.setContentsMargins(0, 0, 0, 0)

    chartview = QtCharts.QChartView()
    chartview.setContentsMargins(0, 0, 0, 0)
    lay.addWidget(chartview)

    series = QtCharts.QLineSeries()

    for i in range(10):
        series << QtCore.QPointF(i, random.uniform(0, 10))

    # Create Chart and set General Chart setting
    chart = QtCharts.QChart()
    chart.addSeries(series)
    chart.setAnimationOptions(QtCharts.QChart.SeriesAnimations)

    # X Axis Settings
    axisX = QtCharts.QValueAxis()
    chart.addAxis(axisX, QtCore.Qt.AlignBottom)
    series.attachAxis(axisX)

    # Y Axis Settings
    axisY = QtCharts.QValueAxis()
    chart.addAxis(axisY, QtCore.Qt.AlignLeft)
    series.attachAxis(axisY)

    chartview.setChart(chart)

    window.show()
    sys.exit(app.exec_())

QChartView促销：

如果你仍然想使用升级方法，那么你必须实现一个自定义的QUiLoader，如果className是QChartView，则返回QChartView，从而覆盖createWidget方法：

import random
import sys

from PySide2 import QtCore, QtGui, QtUiTools, QtWidgets
from PySide2.QtCharts import QtCharts

class UiLoader(QtUiTools.QUiLoader):
    def createWidget(self, className, parent=None, name=""):
        if className == "QChartView":
            return QtCharts.QChartView(parent)
        return super().createWidget(className, parent, name)

def ui_to_window(filename, parent=None):
    file = QtCore.QFile(filename)
    if not file.open(QtCore.QFile.ReadOnly):
        return
    loader = UiLoader()
    window = loader.load(file, parent)
    return window

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = ui_to_window("Pico_LaserCal_MainWindow.ui")
    series = QtCharts.QLineSeries()

    for i in range(10):
        series << QtCore.QPointF(i, random.uniform(0, 10))

    # Create Chart and set General Chart setting
    chart = QtCharts.QChart()
    chart.addSeries(series)
    chart.setAnimationOptions(QtCharts.QChart.SeriesAnimations)

    # X Axis Settings
    axisX = QtCharts.QValueAxis()
    chart.addAxis(axisX, QtCore.Qt.AlignBottom)
    series.attachAxis(axisX)

    # Y Axis Settings
    axisY = QtCharts.QValueAxis()
    chart.addAxis(axisY, QtCore.Qt.AlignLeft)
    series.attachAxis(axisY)

    window.calibrationChart.setChart(chart)

    window.show()
    sys.exit(app.exec_())
赞(0）分享  回复(0）举报  2023-03-28
2hh7jdfx

2hh7jdfx2#

在Qt Designer中将QGraphicsView升级为QChartView的最简单方法是：
1.创建一个QChartViewPointer.py文件，并将其放在main.py文件旁边
1.在www.example.com文件中只写两行QChartViewPointer.py：

from PySide2.QtCharts import QtCharts
QChartView=QtCharts.QChartView

此代码创建一个指向QtCharts.QChartView类的QChartView变量
1.在Qt Designer中，将QGraphicsView添加到表单中（您也可以使用QWidget，但我更喜欢QGraphicsView，因为QChartView继承自QGraphicsView）
1.右键单击QGraphicsView并选择Promote to...
5.Set:

  • 升级类名：*QChartView（QChartView是QChartViewPointer.py文件中指向QtCharts.QChartView类的变量）
  • 头文件：*QChartViewPointer.h（QChartViewPointer. h是声明QChartView变量的文件名，而不是py写h -这是编写PySide的 C++ 的语法）

然后按下添加按钮，最后按下升级。

赞(0）分享  回复(0）举报  2023-03-28
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