PyQT5 - align left

[frohr]

Hi, I am stuck on very stupid thing.
I need align items left and width must be according text length and for line_edit fixed length.
Thank for any advice.

IMAGE

 self.label = QLabel("Low-pass (Hz): ", self)
        self.label.setFont(QFont('Arial', 10))
        self.label.setAlignment(Qt.AlignLeft)

        self.line_edit = QLineEdit("10", self)
        self.line_edit.setFont(QFont('Arial', 10))
        self.line_edit.setAlignment(Qt.AlignLeft)
        self.line_edit.setFixedWidth(120)
   
        self.label1 = QLabel("High-pass (Hz): ", self)
        self.label1.setFont(QFont('Arial', 10))
        self.label1.setAlignment(Qt.AlignLeft)
   
        self.line_edit1 = QLineEdit("10", self)
        self.line_edit1.setFont(QFont('Arial', 10))
        self.line_edit1.setAlignment(Qt.AlignLeft)
        self.line_edit1.setFixedWidth(120)
   
 
        self.combo_box = QComboBox(self)
        self.combo_box.setFont(QFont('Arial', 10))
         
        geek_list = ["Hanning", "Hamming", "Flat", "None"]
        self.combo_box.setEditable(False)
        self.combo_box.addItems(geek_list)
        self.combo_box.setFixedWidth(120)
        
        
        buttonbox3.addWidget(self.label)
        buttonbox3.addWidget(self.line_edit)
        buttonbox3.addWidget(self.label1)
        buttonbox3.addWidget(self.line_edit1)
        buttonbox3.addWidget(self.combo_box)

[menator01]

What type of container is buttonbox3?

[frohr]

buttonbox3 = QHBoxLayout()

class MainWindow(QtWidgets.QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)
        self.canvas = MplCanvas(self, width=5, height=4, dpi=100)
        self.setCentralWidget(self.canvas)
        self.showMaximized() 
        toolbar = NavigationToolbar(self.canvas, self)
        layout = QtWidgets.QVBoxLayout()
      
        buttonbox = QHBoxLayout()  
        buttonbox2 = QHBoxLayout() 
        buttonbox3 = QHBoxLayout()

[deanhystad]

What is the problem? I ran your code and everything lines up to the left.

If you want to compute the fixed width of your LineEdit you can do that using the font metrics

import PySide6.QtWidgets as QtWidgets
from PySide6.QtGui import QFontMetrics
from PySide6.QtGui import Qt

def fitToText(widget, text, padding=10):
        """Set width to fit text"""
        pixels = QFontMetrics(widget.font()).boundingRect(text).width() + padding
        widget.setFixedWidth(pixels)
        return pixels

class MyWindow(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self.lp_label = QtWidgets.QLabel("Low-pass (Hz): ", self)
        self.lp_label.setAlignment(Qt.AlignLeft)

        self.lp_edit = QtWidgets.QLineEdit("10", self)
        self.lp_edit.setAlignment(Qt.AlignLeft)
        fixed_width = fitToText(self.lp_edit, "000.00")

        self.hp_label = QtWidgets.QLabel("High-pass (Hz): ", self)
        self.hp_label.setAlignment(Qt.AlignLeft)

        self.hp_edit = QtWidgets.QLineEdit("10", self)
        self.hp_edit.setAlignment(Qt.AlignLeft)
        self.hp_edit.setFixedWidth(fixed_width)


        self.hanning_sel = QtWidgets.QComboBox(self)
        self.hanning_sel.addItems(["Hanning", "Hamming", "Flat", "None"])
        fitToText(self.hanning_sel, "Hamming", 30)


        buttonbox3 = QtWidgets.QVBoxLayout(self)
        buttonbox3.addWidget(self.lp_label)
        buttonbox3.addWidget(self.lp_edit)
        buttonbox3.addWidget(self.hp_label)
        buttonbox3.addWidget(self.hp_edit)
        buttonbox3.addWidget(self.hanning_sel)

app = QtWidgets.QApplication()
window = MyWindow()
window.show()
app.exec()

Please provide a runnable example next time you post

[menator01]

Or use qgridlayout and not set a fixed size on your line edit. If you are planning on letting the window expand.

from PyQt5.QtWidgets import (QGridLayout, QLabel, QComboBox, QLineEdit, QApplication, QWidget)
from PyQt5.QtCore import Qt
import sys

app = QApplication(sys.argv)
widget = QWidget()
container = QGridLayout()

label = QLabel('Low-pass (Hz): ')
line_edit = QLineEdit()

label2 = QLabel('High-pass (Hz): ')
line_edit2 = QLineEdit()

combo = QComboBox()
geek_list = ['Hanning', 'Hamming', 'Flat', 'None']
combo.addItems(geek_list)

container.addWidget(label, 0, 0, 1, 1)
container.addWidget(line_edit, 0, 1, 1, 1)
container.addWidget(label2, 0, 2, 1, 1)
container.addWidget(line_edit2, 0, 3, 1, 1)
container.addWidget(combo, 0, 4, 1, 1)

widget.setLayout(container)
widget.show()
sys.exit(app.exec())

[frohr]

Or use qgridlayout and not set a fixed size on your line edit. If you are planning on letting the window expand.

I think it is my misunderstanding, sorry for that... What I want is:
https://pasteboard.co/j23sW1gpTldR.jpg

[Axel_Erfurt]

You want it horizontal

import PyQt5.QtWidgets as QtWidgets
from PyQt5.QtGui import QFontMetrics
from PyQt5.QtCore import Qt
 
 
class MyWindow(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self.setGeometry(100, 100, 800, 50)
        self.lp_label = QtWidgets.QLabel("Low-pass (Hz): ", self)
        self.lp_label.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
        self.lp_label.setFixedWidth(self.get_metrics(self.lp_label))
 
        self.lp_edit = QtWidgets.QLineEdit("150", self)
        self.lp_edit.setAlignment(Qt.AlignLeft)
        self.lp_edit.setFixedWidth(self.get_metrics(self.lp_edit) + 10)
 
        self.hp_label = QtWidgets.QLabel("High-pass (Hz): ", self)
        self.hp_label.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
        self.hp_label.setFixedWidth(self.get_metrics(self.hp_label))
 
        self.hp_edit = QtWidgets.QLineEdit("1000", self)
        self.hp_edit.setAlignment(Qt.AlignLeft)
        self.hp_edit.setFixedWidth(self.get_metrics(self.hp_edit) + 10)
 
        self.hanning_sel = QtWidgets.QComboBox(self)
        self.hanning_sel.addItems(["Hanning", "Hamming", "Flat", "None"])
        self.hanning_sel.setFixedWidth(100)
        
        #space
        space = QtWidgets.QWidget()
 
        buttonbox3 = QtWidgets.QHBoxLayout(self)
        buttonbox3.addWidget(self.lp_label)
        buttonbox3.addWidget(self.lp_edit)
        buttonbox3.addWidget(self.hp_label)
        buttonbox3.addWidget(self.hp_edit)
        buttonbox3.addWidget(self.hanning_sel)
        buttonbox3.addWidget(space)
        
    def get_metrics(self, label):
        return label.fontMetrics().boundingRect(label.text()).width()
        
 
if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    window = MyWindow()
    window.show()
    app.exec()

[deanhystad]

Is the problem that you want to make a lot of these horizontal groups and everything line up vertically as well?