Question

Matplotlib版本 - 1.53

后端 - qt4agg

我使用以下代码实现了复制到剪贴板功能。

    fig = self.canvas.figure
    fig.set_size_inches(width,height)
    buf = io.BytesIO()
    fig.savefig(buf,dpi=300,transparent=True,bbox_inches='tight')
    image=QtGui.QImage.fromData(buf.getvalue())
    mimeData = QMimeData()
    mimeData.setData("PNG",buf.getvalue())
    QtGui.QApplication.clipboard().setMimeData(mimeData)
    buf.close()

我将图形宽度和高度作为用户输入。

帆布

Ctrl + C后

现在复制的图形（具有用户输入高度/宽度）显示在原始图像的顶部。这个叠加的图形很有用，因为可以根据复制的图形大小拖动任何重叠的图例，注释等。所以这是一种打印预览。（我没有实现 - 自动出现）

图像完全复制到剪贴板。我唯一的问题是底层人物（美学）。缩放/平移等仅适用于叠加图形，并且对基础图形没有影响。有没有办法只清除基础数字。

调整窗口大小会移除叠加图形并将控制恢复为基础图形。

示例代码：

import io
from PyQt4.uic import loadUiType
from PyQt4.QtCore import QMimeData

from matplotlib.figure import Figure
from matplotlib.backends.backend_qt4agg import (
        FigureCanvasQTAgg as FigureCanvas,
        NavigationToolbar2QT as NavigationToolbar)
from matplotlib.backend_bases import key_press_handler
Ui_MainWindow, QMainWindow = loadUiType('window.ui')


class Main(QMainWindow, Ui_MainWindow):
        def __init__(self, ):
                super(Main, self).__init__()
                self.setupUi(self)
                self.fig_dict = {}

                self.mplfigs.itemClicked.connect(self.changefig)
                self.menu()
                fig = Figure()
                self.addmpl(fig)
        def menu(self):
            copyimg=QtGui.QAction('&Copy', self) 
            copyimg.setShortcut('Ctrl+C')
            copyimg.setStatusTip('Copy to Clipboard')
            copyimg.triggered.connect(self.copy_to_clipboard)
            menubar = self.menuBar()
            fileMenu = menubar.addMenu('&Edit')
            fileMenu.addAction(copyimg)

        def copy_to_clipboard(self):
            fig = self.canvas.figure
            fig.set_size_inches(6,4)
            buf = io.BytesIO()
            fig.savefig(buf,dpi=300,transparent=True,bbox_inches='tight')
            image=QtGui.QImage.fromData(buf.getvalue())
            mimeData = QMimeData()
            mimeData.setData("PNG",buf.getvalue())
            QtGui.QApplication.clipboard().setMimeData(mimeData)
            buf.close()

        def changefig(self, item):
                text = item.text()
                text = str(text)
                self.rmmpl()
                self.addmpl(self.fig_dict[text])


        def addfig(self, name, fig):
                self.fig_dict[name] = fig
                self.mplfigs.addItem(name)

        def addmpl(self, fig):
                self.canvas = FigureCanvas(fig)
                self.mplvl.addWidget(self.canvas)
                self.canvas.draw()
                self.toolbar = NavigationToolbar(self.canvas, 
                                self.mplwindow, coordinates=True)
                self.mplvl.addWidget(self.toolbar)
                self.canvas.mpl_connect('key_press_event', self.on_key_press)

        def on_key_press(self, event):
                key_press_handler(event, self.canvas, self.toolbar)

        def rmmpl(self,):
                self.mplvl.removeWidget(self.canvas)
                self.canvas.close()
                self.mplvl.removeWidget(self.toolbar)
                self.toolbar.close()

if __name__ == '__main__':
        import sys
        from PyQt4 import QtGui
        import numpy as np

        fig1 = Figure()
        ax1f1 = fig1.add_subplot(111)
        ax1f1.plot(np.random.rand(5))


        app = QtGui.QApplication(sys.argv)
        main = Main()
        main.addfig('One plot', fig1)
        main.show()
        sys.exit(app.exec_())

window.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>1280</width>
    <height>768</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QHBoxLayout" name="horizontalLayout">
    <item>
     <widget class="QWidget" name="mplwindow" native="true">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="focusPolicy">
       <enum>Qt::ClickFocus</enum>
      </property>
      <layout class="QVBoxLayout" name="mplvl"/>
     </widget>
    </item>
    <item>
     <widget class="QListWidget" name="mplfigs">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Fixed" vsizetype="Expanding">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="minimumSize">
       <size>
        <width>200</width>
        <height>0</height>
       </size>
      </property>
      <property name="maximumSize">
       <size>
        <width>200</width>
        <height>16777215</height>
       </size>
      </property>
      <property name="focusPolicy">
       <enum>Qt::ClickFocus</enum>
      </property>
     </widget>
    </item>
   </layout>
  </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>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

由于

Matplotlib - 在savefig之后清除画布上的旧图

0 个答案: