QLineEdit

QLineEdit is a widget that allows the user to enter and edit text. It provides a single line for the user to type in text.

Parameters:

Name	Type	Description	Default
`text`	`str`	The initial text to display in the line edit.	`None`

Signals

cursorPositionChanged: Emitted when the cursor position changes.
editingFinished: Emitted when the editing is finished.
returnPressed: Emitted when the return key is pressed.
textChanged: Emitted when the text changes.
textEdited: Emitted when the text is edited.

Examples

line_edit = QtWidgets.QLineEdit("Enter text here")
print(line_edit.text())
print(line_edit.isModified())

'Enter text here'
False

Now the user modifies the text in the line edit to 'New text'.

print(line_edit.modified())
print(line_edit.text())

True
'New text'

`clear()`

Clear the text in the line edit.

`copy()`

Copy the selected text in the line edit to the clipboard.

`cut()`

Cut the selected text in the line edit to the clipboard.

`isModified()`

Check if the text in the line edit has been modified by the user. setText resets the modified flag.

Returns:

Type	Description
`bool`	True if the text has been modified, False otherwise.

`isReadOnly()`

Check if the line edit is read-only.

Returns:

Type	Description
`bool`	True if the line edit is read-only, False otherwise.

`maxLength()`

Get the maximum length of the text in the line edit.

Returns:

Type	Description
`int`	The maximum length of the text in the line edit.

`paste()`

Paste the text from the clipboard to the line edit.

`placeholderText()`

Get the placeholder text displayed in the line edit when it is empty.

Returns:

Type	Description
`str`	The placeholder text.

`redo()`

Redo the last operation in the line edit.

`setMaxLength(length)`

Set the maximum length of the text in the line edit.

Parameters:

Name	Type	Description	Default
`length`	`int`	The maximum length of the text in the line edit.	required

`setPlaceholderText(text)`

Set the placeholder text displayed in the line edit when it is empty. The placeholder text is displayed in gray.

Parameters:

Name	Type	Description	Default
`text`	`str`	The placeholder text.	required

`setReadOnly(read_only)`

Set the line edit to read-only. If the line edit is read-only, the user cannot edit the text.

Parameters:

Name	Type	Description	Default
`read_only`	`bool`	True to set the line edit to read-only, False otherwise.	required

`setText(text)`

Set the content of the line edit to the specified text.

Parameters:

Name	Type	Description	Default
`text`	`str`	The text to set in the line edit.	required

`text()`

Get the text in the line edit.

Returns:

Type	Description
`str`	The text in the line edit.

`undo()`

Undo the last operation in the line edit.