CODEWITHSUNDEEP
pythonqtlayoutpyqt
Jardel Matias
Jardel Matias

Reputation: 21

Empty spaces between Widgets even with setSpacing(0)

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys

data = {'dia': 23, 'mes': 8, 'ano': 2017}

class FormConfigBkpBD(QWidget):

    senha = None
    pathLine = None

    def __init__(self, parent=None,instancia=None):
        super(FormConfigBkpBD, self).__init__(parent)

        mainLayout = QVBoxLayout()

        mainLayout.setSpacing(0)
        mainLayout.setContentsMargins(0, 0, 0, 0)

        self.senha = QLineEdit()
        self.senha.setEchoMode(QLineEdit.Password)
        self.senha.setFixedSize(385, 25)

        self.pathLine = QLineEdit()
        self.pathLine.setFixedSize(355,25)

        self.senha.setContentsMargins(0,0,0,0)
        self.pathLine.setContentsMargins(0,0,0,0)

        mainLayout.addWidget(self.pathLine,0,Qt.AlignTop)
        mainLayout.addWidget(self.senha,0,Qt.AlignTop)

        self.setWindowTitle("Configuração de Backup - Banco de Dados")
        self.setFixedSize(460,640)
        self.setLayout(mainLayout)


def main():

    app = QApplication(sys.argv)

    bd = FormConfigBkpBD()
    bd.show()

    app.exec()


if __name__ == "__main__" :

    main()

The above code shows only two widgets (QLineEdit), the original window has much more widgets, this is only for post here. Why, even with setSpacing(0) and setContentsMargins(0,0,0,0) there's a space between widgets?

Upvotes: 1

Views: 2545

Answers (1)

rbaleksandar
rbaleksandar

Reputation: 9711

It's because of the combination between the fixed size of your window and the layout you are using. The vertical layout tries to distribute evenly (unless told otherwise) all of its children vertically and fill the whole window.

Here you have two widgets so the first one goes in the first cell and the second one goes in the second cell. Since you haven't set any alignment the default behaviour is present that is top left corner of each cell is where the widget is positioned. The rest is just filling the free space of the parent window which the layout is part of.

If you want not space between the widgets

  • either remove the fixed size of the window

    enter image description here

  • or put more widgets in the layout until it's "full".

The first option might not be what you want to do (otherwise you would have probably not set it to fixed size in the first place). The second can be achieved by simply using a QSpacerItem (vertical one) that will take care of the empty space for you and push the widgets to the top where you want these to be:

mainLayout.addStretch(1)

You can also add the spacer manually if you need more control over its behaviour:

self.spacer = QSpacerItem(20, 40, QSizePolicy.Minimum, QSizePolicy.Expanding) # or Fixed
mainLayout.addItem(self.spacer)

Upvotes: 2

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