Create a Graphics View

JThornton

I found an example and tried to incorporate it into my code but it creates a new QGraphicsView and does not put the objects in the QGraphicsView that is in the loaded UI. I know I'm missing some small detail...

#!/usr/bin/python3

import os, sys
from PyQt5 import uic
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QGraphicsScene, QGraphicsView, QGraphicsItem
from PyQt5.QtGui import QBrush, QPen

UI_FILE = os.path.join(os.path.dirname(__file__), "d2p.ui")

class MainWindow(QMainWindow):
	def __init__(self):
		super(MainWindow, self).__init__()
		uic.loadUi(UI_FILE, self)
		self.setWindowTitle('HELP ME')
		self.createGraphicView()
		self.show()

	def createGraphicView(self):
		self.scene  = QGraphicsScene()
		self.greenBrush = QBrush(Qt.green)
		self.grayBrush = QBrush(Qt.gray)
		self.pen = QPen(Qt.red)
		self.graphicView = QGraphicsView(self.scene, self)
		self.graphicView.setGeometry(0,0,600,400)
		self.shapes()

	def shapes(self):
		ellipse = self.scene.addEllipse(20,20, 200,200, self.pen, self.greenBrush)
		rect = self.scene.addRect(-100,-100, 200,200, self.pen, self.grayBrush)
		ellipse.setFlag(QGraphicsItem.ItemIsMovable)
		rect.setFlag(QGraphicsItem.ItemIsMovable)
		ellipse.setFlag(QGraphicsItem.ItemIsSelectable)

def main():
	app = QApplication(sys.argv)
	ex = MainWindow()
	sys.exit(app.exec_())

if __name__ == "__main__":
	main()

The 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>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QWidget" name="widget" native="true">
      <widget class="QLabel" name="coordLbl">
       <property name="geometry">
        <rect>
         <x>30</x>
         <y>10</y>
         <width>141</width>
         <height>19</height>
        </rect>
       </property>
       <property name="text">
        <string>TextLabel</string>
       </property>
      </widget>
     </widget>
    </item>
    <item>
     <widget class="QWidget" name="widget_2" native="true">
      <layout class="QHBoxLayout" name="horizontalLayout">
       <item>
        <widget class="QGraphicsView" name="graphicsView">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
           <horstretch>0</horstretch>
           <verstretch>30</verstretch>
          </sizepolicy>
         </property>
         <property name="minimumSize">
          <size>
           <width>0</width>
           <height>400</height>
          </size>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>800</width>
     <height>24</height>
    </rect>
   </property>
   <widget class="QMenu" name="menuFile">
    <property name="title">
     <string>Fi&amp;le</string>
    </property>
    <addaction name="actionOpen"/>
   </widget>
   <addaction name="menuFile"/>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
  <action name="actionOpen">
   <property name="text">
    <string>&amp;Open</string>
   </property>
  </action>
 </widget>
 <resources/>
 <connections/>
</ui>

alt text

Thanks
JT

jsulm

@JThornton said in Create a Graphics View:

uic.loadUi(UI_FILE, self)

Change this line to

self.ui = uic.loadUi(UI_FILE, self)

And then access your view via

self.ui.graphicsView

And remove

self.graphicView = QGraphicsView(self.scene, self)

from createGraphicView as it creates another view.

JThornton

Thanks so much for the example that works, I'll study that and proceed with my learning. My goal is to open a DXF file and display it and allow the user to select the start point for plasma cutting.

JT

JThornton

@Denni-0

I've been studying your code and do you not use the Qt Designer but rather just code everything in Python?

JT