PyQt5 QSpinBox – Getting tight bounding rectangle of the font
In this article we will see how we can get the tight bounding rectangle of the spin box’s font i.e text. The bounding rectangle always covers at least the set of pixels the text would cover if drawn at (0, 0).
Note : Newline characters are processed as normal characters, not as line breaks.
In order to do this we use tightBoundingRect
method with the spin box’s QFontMetrics object.
Syntax : font_metrics.tightBoundingRect(text)
Argument : It takes string as argument
Return : It returns QRect object.
Below is the implementation
# importing libraries from PyQt5.QtWidgets import * from PyQt5 import QtCore, QtGui from PyQt5.QtGui import * from PyQt5.QtCore import * import sys class Window(QMainWindow): def __init__( self ): super ().__init__() # setting title self .setWindowTitle( "Python " ) # setting geometry self .setGeometry( 100 , 100 , 600 , 400 ) # calling method self .UiComponents() # showing all the widgets self .show() # method for widgets def UiComponents( self ): # creating spin box self .spin = QSpinBox( self ) # setting geometry to spin box self .spin.setGeometry( 100 , 100 , 250 , 40 ) # setting range to the spin box self .spin.setRange( 1 , 999999 ) # setting prefix to spin self .spin.setPrefix( "PREFIX " ) # setting suffix to spin self .spin.setSuffix( " SUFFIX" ) # setting strike out to the font font = self .spin.font() font.setStrikeOut( True ) self .spin.setFont(font) # creating a label label = QLabel( self ) # making label multi line label.setWordWrap( True ) # setting geometry to the label label.setGeometry( 100 , 200 , 300 , 60 ) # getting font metrics f_metrics = self .spin.fontMetrics() # text text = self .spin.text() # getting the tight bounding rectangle value = f_metrics.tightBoundingRect(text) # setting text to the label label.setText( "Tight Rectangle : " + str (value)) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App. exec ()) |
Output :
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