Print data on the application

[john_hobbyist]

I use this code: https://github.com/Axel-Erfurt/OrthoViewLite/blob/main/OrthoViewLite.py

I have defined a function that does some processing. It prints the data to the Ubuntu terminal. I am trying to find a way to print the data on a textbox on the above application. Any ideas what lines should I change? I am using the code below, from this website: https://pythonpyqt.com/pyqt-qtextedit/

self.textEdit = QTextEdit()
layout = QVBoxLayout()
self.setLayout(layout)
self.textEdit.setPlainText("Hello World!")

I included on line 145, but it does not seem to work!

[SGaist]

Hi,

Can you show the actual code you are using ?

Is the method that prints located in a widget subclass ?

[john_hobbyist]

Yes, this is the code I use:

# -*- coding: utf-8 -*-
"""
OrthoViewLite.py
based on https://github.com/kklmn/OrthoView by Konstantin Klementiev
modified by Axel Schneider (added File Selector)
https://github.com/Axel-Erfurt
"""

__author__ = "Konstantin Klementiev"
__versioninfo__ = (1, 0, 2)
__version__ = '.'.join(map(str, __versioninfo__))
__date__ = "8 Feb 2020"
__license__ = "MIT license"

import os
import sys
import cv2
from matplotlib.figure import Figure
import numpy as np
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import (QMainWindow, QApplication, QWidget,QAction, QFileDialog, QMenu, 
                             QToolBar, QHBoxLayout, QTreeView, QFileSystemModel, QSizePolicy, 
                             QMessageBox)
from PyQt5.QtCore import Qt, QDir, QStandardPaths, QFileInfo
import matplotlib.backends.backend_qt5agg as mpl_qt
from PyQt5.QtWidgets import QApplication,QWidget,QTextEdit,QVBoxLayout,QPushButton
import sys


try:
    from ConfigParser import ConfigParser
except ImportError:
    from configparser import ConfigParser


selfDir = os.path.dirname(__file__)
iniApp = (os.path.join(selfDir, 'OrthoViewList.ini'))
config = ConfigParser(
    dict(pos='[0, 0]', corners='[None]*4', scalex=0, scaley=0))
config.add_section('window')
config.read(iniApp)


def write_config():
    with open(iniApp, 'w+') as cf:
        config.write(cf)


class MyToolBar(mpl_qt.NavigationToolbar2QT):
    def set_message(self, s):
        try:
            sstr = s.split()

            while len(sstr) > 5:
                del sstr[0]
            x, y = float(sstr[0][2:]), float(sstr[1][2:])
            s = f'x = {x:.2f}\ny = {y:.2f}'
        except Exception:
            pass

        if self.coordinates:
            self.locLabel.setText(s)


class MyMplCanvas(mpl_qt.FigureCanvasQTAgg):
    def __init__(self, parent=None):
        self.fig = Figure()
        self.fig.patch.set_facecolor('None')
        super(MyMplCanvas, self).__init__(self.fig)
        self.setParent(parent)
        self.updateGeometry()
        self.setupPlot()
        self.mpl_connect('button_press_event', self.onPress)
        self.img = None
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.mouseClickPos = None

        self.menu = QMenu()


    def setupPlot(self):
        rect = [0., 0., 1., 1.]
        self.axes = self.fig.add_axes(rect)
        self.axes.axis("off")

    def imshow(self, img):
        if self.img is None:
            self.img = self.axes.imshow(img)
        else:
            prev = self.img.get_array()
            self.img.set_data(img)
            if prev.shape != img.shape:
                self.img.set_extent(
                    [-0.5, img.shape[1]-0.5, img.shape[0]-0.5, -0.5])
                self.axes.set_xlim((0, img.shape[1]))
                self.axes.set_ylim((img.shape[0], 0))
                self.toolbar.update()
        self.draw()

    def onPress(self, event):
        if (event.xdata is None) or (event.ydata is None):
            self.mouseClickPos = None
            return
        self.mouseClickPos = int(round(event.xdata)), int(round(event.ydata))


class OrthoView(QMainWindow):
    def __init__(self, parent=None):
        super(OrthoView, self).__init__(parent)

        self.setWindowTitle('OrthoViewLite')
        self.setStyleSheet("QMainWindow {background: #e9e9e9;} QHBoxLayout \
                            {background: #e9e9e9;} QTreeView {background: #e9e9e9;}  \
                            FigureCanvasQTAgg {background: #e9e9e9;} QToolBar {border: 0px;}")
        self.setMinimumSize(500, 350)
        self.image_file_path = ""   
        if config.has_option('window', 'win_left') and config.has_option('window', 'win_top') \
            and config.has_option('window', 'win_width') and config.has_option('window', 'win_height'):
            left = int(config.get('window', 'win_left'))
            top = int(config.get('window', 'win_top'))
            width = int(config.get('window', 'win_width'))
            height = int(config.get('window', 'win_height'))
            self.setGeometry (left, top, width, height)
            
        self.home_path = QStandardPaths.standardLocations(QStandardPaths.PicturesLocation)[0]

        self.tb = QToolBar("File")
        
        empty = QWidget()
        empty.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.tb.addWidget(empty)
        
        open_btn = QAction("Open Image File", self, triggered=self.openFile)
        open_btn.setIcon(QIcon.fromTheme("document-open"))
        self.tb.addAction(open_btn)
       
        go_up_btn = QAction("one level up", self, triggered=self.oneUp)
        go_up_btn.setIcon(QIcon.fromTheme("go-up"))
        self.tb.addAction(go_up_btn)
        
        go_home_btn = QAction("go to home", self, triggered=self.goHome)
        go_home_btn.setIcon(QIcon.fromTheme("go-home"))
        self.tb.addAction(go_home_btn)

        stretch = QWidget()
        stretch.setFixedWidth(200)
        self.tb.addWidget(stretch)
        ########################################
        self.textEdit = QTextEdit()
        layout = QVBoxLayout()
        self.setLayout(layout)
        self.textEdit.setPlainText("Hello World!")
        #########################################
        self.plotCanvas = MyMplCanvas(self)
        self.plotCanvas.setSizePolicy(
            QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.toolbar = MyToolBar(self.plotCanvas, self)
        for action in self.toolbar.findChildren(QAction):
            if action.text() in ['Customize', 'Subplots']:
                action.setVisible(False)
        self.toolbar.locLabel.setAlignment(Qt.AlignRight)
        self.toolbar.locLabel.setFixedWidth(200)

        self.tb.setContextMenuPolicy(Qt.PreventContextMenu)
        self.tb.setMovable(False)
        self.tb.setAllowedAreas(Qt.TopToolBarArea)
        self.toolbar.setContextMenuPolicy(Qt.PreventContextMenu)
        self.toolbar.setMovable(False)
        self.toolbar.setAllowedAreas(Qt.TopToolBarArea)
        self.addToolBar(self.toolbar)
        self.addToolBar(self.tb)

        
        mylayout = QHBoxLayout()
        mylayout.addWidget(self.plotCanvas)
        
        self.mylistwidget = QTreeView()
        self.mylistwidget.setFixedWidth(300)
        mylayout.addWidget(self.mylistwidget)
        
        self.fileModel = QFileSystemModel()
        self.fileModel.setFilter(QDir.NoDotAndDotDot | QDir.Files | QDir.AllDirs)
        self.fileModel.setRootPath(QDir.homePath())
        
        self.mylistwidget.setModel(self.fileModel)
        self.mylistwidget.setRootIndex(self.fileModel.index(self.home_path))
        #self.mylistwidget.setRootIndex(self.fileModel.index("/"))
        
        self.mylistwidget.selectionModel().selectionChanged.connect(self.on_clicked)
        self.mylistwidget.clicked.connect(self.tree_clicked)
        col = [1, 2, 3, 4]
        for c in col:
            self.mylistwidget.hideColumn(c)
        
        mywidget = QWidget()
        mywidget.setLayout(mylayout)
        self.setCentralWidget(mywidget)
        
        self.myfilter = ["tif", "tiff", "png", "jpg"]
        self.treefilter = ["*.tif", "*.tiff", "*.png", "*.jpg"]
        
        self.fileModel.setNameFilters(self.treefilter)
        self.fileModel.setNameFilterDisables(False)

        self.mylistwidget.setFocus()        
        self.mylistwidget.resizeColumnToContents(1)

    def goHome(self):
       self.mylistwidget.setRootIndex(self.fileModel.index(self.home_path)) 
       
    def oneUp(self):
       self.mylistwidget.setRootIndex(self.mylistwidget.rootIndex().parent()) 

    def on_clicked(self):
        path = self.fileModel.fileInfo(self.mylistwidget.currentIndex()).absoluteFilePath()
        if QDir.exists(QDir(path)):
            print(path, "is folder")
        else:
            if QFileInfo(path).suffix() in self.myfilter:
                if not os.stat(path).st_size == 0:
                    print(path)
                    self.image_file_path = path
                    self.updateFrame()
                else:
                    print("file not exists or has size 0")
                    self.msgbox("File is empty (size 0)") 
                
    def tree_clicked(self):
        index = self.mylistwidget.currentIndex()
        if not self.mylistwidget.isExpanded(index):
            self.mylistwidget.setExpanded(index, True) 
            self.mylistwidget.resizeColumnToContents(0)
        else:
            self.mylistwidget.setExpanded(index, False) 
            self.mylistwidget.resizeColumnToContents(0)
        
    def openFile(self):
        print("open File Dialog")
        path, _ = QFileDialog.getOpenFileName(self, "Open File", self.image_file_path,"Image Files (*.tif *.tiff *.png *.jpg)")
        if path:
            if os.path.isfile(path) and not os.stat(path).st_size == 0:
                self.image_file_path = path
                print("file exists:",self.image_file_path)
                self.updateFrame()
            else:
                print("file not exists or has size 0")      
                self.msgbox("File is empty (size 0)")    


    def getFrame(self, path):
        if os.path.isfile(path):
            frame = cv2.imread(path, 1)
            if not np.shape(frame) == ():
                self.img = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
            else:
                print("Error!")
                frame = cv2.imread(path, cv2.IMREAD_UNCHANGED)
                self.img = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        else:
            self.openFile()

    def updateFrame(self):
        self.getFrame(self.image_file_path)
        overlay = self.img.copy()
        alpha = 0.75  # transparency factor
        imageNew = cv2.addWeighted(overlay, alpha, self.img, 1-alpha, 0)
        self.plotCanvas.imshow(imageNew)
        
    def closeEvent(self, e):
        config.set('window', 'win_left', str(self.geometry().x()))
        config.set('window', 'win_top', str(self.geometry().y()))
        config.set('window', 'win_width', str(self.geometry().width()))
        config.set('window', 'win_height', str(self.geometry().height()))
        
        with open(iniApp, 'w+') as cf:
            config.write(cf)

    def msgbox(self, message):
        msg = QMessageBox(2, "Error", message, QMessageBox.Ok)
        msg.exec()



if __name__ == "__main__":
    app = QApplication(sys.argv)
    icon = QIcon(os.path.join(selfDir, '_static', 'orthoview.ico'))
    app.setWindowIcon(icon)

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

[SGaist]

QMainWindow already has a layout so your call to setLayout will fail and you should have a warning printed on the console about that.

[john_hobbyist]

@SGaist: Ok, what should I change in order to make it work? Thanks

[SGaist]

Add it to "mylayout".

[john_hobbyist]

@SGaist: I added this:

mylayout = QVBoxLayout()

on line 168 and the only thing that changed is that the window with the files directory on the right went on the left, and now covers the left side of a loaded image....

[SGaist]

I meant: add your QTextEdit to your original mylayout.

[john_hobbyist]

Which line? The command is correct?

[SGaist]

There's no reason to create mylayout again. Just use the one you already have.

self.textEdit = QTextEdit()
self.textEdit.setPlainText("Hello World!")
mylayout.addWidget(self.textEdit)

Please use proper name for your variables, that will make things easier.

[john_hobbyist]

@SGaist:

I have written this code:

self.textEdit.setPlainText(str(counter_1))
self.textEdit.setPlainText(str(counter_2))
self.textEdit.setPlainText(str(counter_3))

and I am searching how to print these 3 lines in the same QTextEdit box ... any idea?

Update: I found it...it needs append...

[SGaist]

So you have everything working now ?