QPlainTextEdit¶
The
QPlainTextEdit
class provides a widget that is used to edit and display plain text. More…
Synopsis¶
Functions¶
def
anchorAt
(pos)def
backgroundVisible
()def
blockBoundingGeometry
(block)def
blockBoundingRect
(block)def
blockCount
()def
canPaste
()def
centerOnScroll
()def
contentOffset
()def
createStandardContextMenu
()def
createStandardContextMenu
(position)def
currentCharFormat
()def
cursorForPosition
(pos)def
cursorRect
()def
cursorRect
(cursor)def
cursorWidth
()def
document
()def
documentTitle
()def
ensureCursorVisible
()def
extraSelections
()def
find
(exp[, options=QTextDocument.FindFlags()])def
find
(exp[, options=QTextDocument.FindFlags()])def
find
(exp[, options=QTextDocument.FindFlags()])def
firstVisibleBlock
()def
getPaintContext
()def
inputMethodQuery
(query, argument)def
isReadOnly
()def
isUndoRedoEnabled
()def
lineWrapMode
()def
maximumBlockCount
()def
mergeCurrentCharFormat
(modifier)def
moveCursor
(operation[, mode=QTextCursor.MoveAnchor])def
overwriteMode
()def
placeholderText
()def
print_
(printer)def
setBackgroundVisible
(visible)def
setCenterOnScroll
(enabled)def
setCurrentCharFormat
(format)def
setCursorWidth
(width)def
setDocument
(document)def
setDocumentTitle
(title)def
setExtraSelections
(selections)def
setLineWrapMode
(mode)def
setMaximumBlockCount
(maximum)def
setOverwriteMode
(overwrite)def
setPlaceholderText
(placeholderText)def
setReadOnly
(ro)def
setTabChangesFocus
(b)def
setTabStopDistance
(distance)def
setTabStopWidth
(width)def
setTextCursor
(cursor)def
setTextInteractionFlags
(flags)def
setUndoRedoEnabled
(enable)def
setWordWrapMode
(policy)def
tabChangesFocus
()def
tabStopDistance
()def
tabStopWidth
()def
textCursor
()def
textInteractionFlags
()def
toPlainText
()def
wordWrapMode
()def
zoomInF
(range)
Virtual functions¶
def
canInsertFromMimeData
(source)def
createMimeDataFromSelection
()def
doSetTextCursor
(cursor)def
insertFromMimeData
(source)def
loadResource
(type, name)
Slots¶
def
appendHtml
(html)def
appendPlainText
(text)def
centerCursor
()def
clear
()def
copy
()def
cut
()def
insertPlainText
(text)def
paste
()def
redo
()def
selectAll
()def
setPlainText
(text)def
undo
()def
zoomIn
([range=1])def
zoomOut
([range=1])
Signals¶
def
blockCountChanged
(newBlockCount)def
copyAvailable
(b)def
cursorPositionChanged
()def
modificationChanged
(arg__1)def
redoAvailable
(b)def
selectionChanged
()def
textChanged
()def
undoAvailable
(b)def
updateRequest
(rect, dy)
Detailed Description¶
Introduction and Concepts¶
QPlainTextEdit
is an advanced viewer/editor supporting plain text. It is optimized to handle large documents and to respond quickly to user input.QPlainText uses very much the same technology and concepts as
QTextEdit
, but is optimized for plain text handling.
QPlainTextEdit
works on paragraphs and characters. A paragraph is a formatted string which is word-wrapped to fit into the width of the widget. By default when reading plain text, one newline signifies a paragraph. A document consists of zero or more paragraphs. Paragraphs are separated by hard line breaks. Each character within a paragraph has its own attributes, for example, font and color.The shape of the mouse cursor on a
QPlainTextEdit
isIBeamCursor
by default. It can be changed through theviewport()
‘s cursor property.
Using QPlainTextEdit as a Display Widget¶
The text is set or replaced using
setPlainText()
which deletes the existing text and replaces it with the text passed tosetPlainText()
.Text can be inserted using the
QTextCursor
class or using the convenience functionsinsertPlainText()
,appendPlainText()
orpaste()
.By default, the text edit wraps words at whitespace to fit within the text edit widget. The
setLineWrapMode()
function is used to specify the kind of line wrap you want,WidgetWidth
orNoWrap
if you don’t want any wrapping. If you use word wrap to the widget’s widthWidgetWidth
, you can specify whether to break on whitespace or anywhere withsetWordWrapMode()
.The
find()
function can be used to find and select a given string within the text.If you want to limit the total number of paragraphs in a
QPlainTextEdit
, as it is for example useful in a log viewer, then you can use themaximumBlockCount
property. The combination ofsetMaximumBlockCount()
andappendPlainText()
turnsQPlainTextEdit
into an efficient viewer for log text. The scrolling can be reduced with thecenterOnScroll()
property, making the log viewer even faster. Text can be formatted in a limited way, either using a syntax highlighter (see below), or by appending html-formatted text withappendHtml()
. WhileQPlainTextEdit
does not support complex rich text rendering with tables and floats, it does support limited paragraph-based formatting that you may need in a log viewer.
Read-only Key Bindings¶
When
QPlainTextEdit
is used read-only the key bindings are limited to navigation, and text may only be selected with the mouse:
Keypresses
Action
UpArrow
Moves one line up.
DownArrow
Moves one line down.
LeftArrow
Moves one character to the left.
RightArrow
Moves one character to the right.
PageUp
Moves one (viewport) page up.
PageDown
Moves one (viewport) page down.
Home
Moves to the beginning of the text.
End
Moves to the end of the text.
Alt+Wheel
Scrolls the page horizontally (the Wheel is the mouse wheel).
Ctrl+Wheel
Zooms the text.
Ctrl+A
Selects all text.
Using QPlainTextEdit as an Editor¶
All the information about using
QPlainTextEdit
as a display widget also applies here.Selection of text is handled by the
QTextCursor
class, which provides functionality for creating selections, retrieving the text contents or deleting selections. You can retrieve the object that corresponds with the user-visible cursor using thetextCursor()
method. If you want to set a selection inQPlainTextEdit
just create one on aQTextCursor
object and then make that cursor the visible cursor usingsetCursor()
. The selection can be copied to the clipboard withcopy()
, or cut to the clipboard withcut()
. The entire text can be selected usingselectAll()
.
QPlainTextEdit
holds aQTextDocument
object which can be retrieved using thedocument()
method. You can also set your own document object usingsetDocument()
.QTextDocument
emits atextChanged()
signal if the text changes and it also provides a isModified() function which will return true if the text has been modified since it was either loaded or since the last call to setModified with false as argument. In addition it provides methods for undo and redo.
Syntax Highlighting¶
Just like
QTextEdit
,QPlainTextEdit
works together withQSyntaxHighlighter
.
Editing Key Bindings¶
The list of key bindings which are implemented for editing:
Keypresses
Action
Backspace
Deletes the character to the left of the cursor.
Delete
Deletes the character to the right of the cursor.
Ctrl+C
Copy the selected text to the clipboard.
Ctrl+Insert
Copy the selected text to the clipboard.
Ctrl+K
Deletes to the end of the line.
Ctrl+V
Pastes the clipboard text into text edit.
Shift+Insert
Pastes the clipboard text into text edit.
Ctrl+X
Deletes the selected text and copies it to the clipboard.
Shift+Delete
Deletes the selected text and copies it to the clipboard.
Ctrl+Z
Undoes the last operation.
Ctrl+Y
Redoes the last operation.
LeftArrow
Moves the cursor one character to the left.
Ctrl+LeftArrow
Moves the cursor one word to the left.
RightArrow
Moves the cursor one character to the right.
Ctrl+RightArrow
Moves the cursor one word to the right.
UpArrow
Moves the cursor one line up.
Ctrl+UpArrow
Moves the cursor one word up.
DownArrow
Moves the cursor one line down.
Ctrl+Down Arrow
Moves the cursor one word down.
PageUp
Moves the cursor one page up.
PageDown
Moves the cursor one page down.
Home
Moves the cursor to the beginning of the line.
Ctrl+Home
Moves the cursor to the beginning of the text.
End
Moves the cursor to the end of the line.
Ctrl+End
Moves the cursor to the end of the text.
Alt+Wheel
Scrolls the page horizontally (the Wheel is the mouse wheel).
Ctrl+Wheel
Zooms the text.
To select (mark) text hold down the Shift key whilst pressing one of the movement keystrokes, for example, Shift+Right Arrow will select the character to the right, and Shift+Ctrl+Right Arrow will select the word to the right, etc.
Differences to QTextEdit¶
QPlainTextEdit
is a thin class, implemented by using most of the technology that is behindQTextEdit
andQTextDocument
. Its performance benefits overQTextEdit
stem mostly from using a different and simplified text layout calledQPlainTextDocumentLayout
on the text document (seesetDocumentLayout()
). The plain text document layout does not support tables nor embedded frames, and replaces a pixel-exact height calculation with a line-by-line respectively paragraph-by-paragraph scrolling approach . This makes it possible to handle significantly larger documents, and still resize the editor with line wrap enabled in real time. It also makes for a fast log viewer (seesetMaximumBlockCount()
).See also
QTextDocument
QTextCursor
Application Example Code Editor Example Syntax Highlighter Example Rich Text Processing
- class PySide2.QtWidgets.QPlainTextEdit([parent=None])¶
PySide2.QtWidgets.QPlainTextEdit(text[, parent=None])
- param parent:
- param text:
str
Constructs an empty
QPlainTextEdit
with parentparent
.
- PySide2.QtWidgets.QPlainTextEdit.LineWrapMode¶
Constant
Description
QPlainTextEdit.NoWrap
QPlainTextEdit.WidgetWidth
- PySide2.QtWidgets.QPlainTextEdit.anchorAt(pos)¶
- Parameters:
pos –
PySide2.QtCore.QPoint
- Return type:
str
Returns the reference of the anchor at position
pos
, or an empty string if no anchor exists at that point.
- PySide2.QtWidgets.QPlainTextEdit.appendHtml(html)¶
- Parameters:
html – str
Appends a new paragraph with
html
to the end of the text edit.
- PySide2.QtWidgets.QPlainTextEdit.appendPlainText(text)¶
- Parameters:
text – str
Appends a new paragraph with
text
to the end of the text edit.See also
- PySide2.QtWidgets.QPlainTextEdit.backgroundVisible()¶
- Return type:
bool
This property holds whether the palette background is visible outside the document area.
If set to true, the plain text edit paints the palette background on the viewport area not covered by the text document. Otherwise, if set to false, it won’t. The feature makes it possible for the user to visually distinguish between the area of the document, painted with the base color of the palette, and the empty area not covered by any document.
The default is false.
- PySide2.QtWidgets.QPlainTextEdit.blockBoundingGeometry(block)¶
- Parameters:
block –
PySide2.QtGui.QTextBlock
- Return type:
Returns the bounding rectangle of the text
block
in content coordinates. Translate the rectangle with thecontentOffset()
to get visual coordinates on the viewport.See also
- PySide2.QtWidgets.QPlainTextEdit.blockBoundingRect(block)¶
- Parameters:
block –
PySide2.QtGui.QTextBlock
- Return type:
Returns the bounding rectangle of the text
block
in the block’s own coordinates.See also
- PySide2.QtWidgets.QPlainTextEdit.blockCount()¶
- Return type:
int
This property holds the number of text blocks in the document..
By default, in an empty document, this property contains a value of 1.
- PySide2.QtWidgets.QPlainTextEdit.blockCountChanged(newBlockCount)¶
- Parameters:
newBlockCount – int
- PySide2.QtWidgets.QPlainTextEdit.canInsertFromMimeData(source)¶
- Parameters:
source –
PySide2.QtCore.QMimeData
- Return type:
bool
This function returns
true
if the contents of the MIME data object, specified bysource
, can be decoded and inserted into the document. It is called for example when during a drag operation the mouse enters this widget and it is necessary to determine whether it is possible to accept the drag.
- PySide2.QtWidgets.QPlainTextEdit.canPaste()¶
- Return type:
bool
Returns whether text can be pasted from the clipboard into the textedit.
- PySide2.QtWidgets.QPlainTextEdit.centerCursor()¶
Scrolls the document in order to center the cursor vertically.
See also
- PySide2.QtWidgets.QPlainTextEdit.centerOnScroll()¶
- Return type:
bool
This property holds whether the cursor should be centered on screen.
If set to true, the plain text edit scrolls the document vertically to make the cursor visible at the center of the viewport. This also allows the text edit to scroll below the end of the document. Otherwise, if set to false, the plain text edit scrolls the smallest amount possible to ensure the cursor is visible. The same algorithm is applied to any new line appended through
appendPlainText()
.The default is false.
See also
- PySide2.QtWidgets.QPlainTextEdit.clear()¶
Deletes all the text in the text edit.
Notes:
The undo/redo history is also cleared.
currentCharFormat()
is reset, unlesstextCursor()
is already at the beginning of the document.
See also
- PySide2.QtWidgets.QPlainTextEdit.contentOffset()¶
- Return type:
Returns the content’s origin in viewport coordinates.
The origin of the content of a plain text edit is always the top left corner of the first visible text block. The content offset is different from (0,0) when the text has been scrolled horizontally, or when the first visible block has been scrolled partially off the screen, i.e. the visible text does not start with the first line of the first visible block, or when the first visible block is the very first block and the editor displays a margin.
- PySide2.QtWidgets.QPlainTextEdit.copy()¶
Copies any selected text to the clipboard.
See also
- PySide2.QtWidgets.QPlainTextEdit.copyAvailable(b)¶
- Parameters:
b – bool
- PySide2.QtWidgets.QPlainTextEdit.createMimeDataFromSelection()¶
- Return type:
This function returns a new MIME data object to represent the contents of the text edit’s current selection. It is called when the selection needs to be encapsulated into a new
QMimeData
object; for example, when a drag and drop operation is started, or when data is copied to the clipboard.If you reimplement this function, note that the ownership of the returned
QMimeData
object is passed to the caller. The selection can be retrieved by using thetextCursor()
function.
- PySide2.QtWidgets.QPlainTextEdit.createStandardContextMenu()¶
- Return type:
This function creates the standard context menu which is shown when the user clicks on the text edit with the right mouse button. It is called from the default
contextMenuEvent()
handler. The popup menu’s ownership is transferred to the caller.We recommend that you use the (
QPoint
) version instead which will enable the actions that are sensitive to where the user clicked.
- PySide2.QtWidgets.QPlainTextEdit.createStandardContextMenu(position)
- Parameters:
position –
PySide2.QtCore.QPoint
- Return type:
This function creates the standard context menu which is shown when the user clicks on the text edit with the right mouse button. It is called from the default
contextMenuEvent()
handler and it takes theposition
in document coordinates where the mouse click was. This can enable actions that are sensitive to the position where the user clicked. The popup menu’s ownership is transferred to the caller.
- PySide2.QtWidgets.QPlainTextEdit.currentCharFormat()¶
- Return type:
Returns the char format that is used when inserting new text.
See also
- PySide2.QtWidgets.QPlainTextEdit.cursorForPosition(pos)¶
- Parameters:
pos –
PySide2.QtCore.QPoint
- Return type:
returns a
QTextCursor
at positionpos
(in viewport coordinates).
- PySide2.QtWidgets.QPlainTextEdit.cursorPositionChanged()¶
- PySide2.QtWidgets.QPlainTextEdit.cursorRect(cursor)¶
- Parameters:
cursor –
PySide2.QtGui.QTextCursor
- Return type:
returns a rectangle (in viewport coordinates) that includes the
cursor
.
- PySide2.QtWidgets.QPlainTextEdit.cursorRect()
- Return type:
returns a rectangle (in viewport coordinates) that includes the cursor of the text edit.
- PySide2.QtWidgets.QPlainTextEdit.cursorWidth()¶
- Return type:
int
This property specifies the width of the cursor in pixels. The default value is 1.
- PySide2.QtWidgets.QPlainTextEdit.cut()¶
Copies the selected text to the clipboard and deletes it from the text edit.
If there is no selected text nothing happens.
- PySide2.QtWidgets.QPlainTextEdit.doSetTextCursor(cursor)¶
- Parameters:
cursor –
PySide2.QtGui.QTextCursor
This provides a hook for subclasses to intercept cursor changes.
- PySide2.QtWidgets.QPlainTextEdit.document()¶
- Return type:
Returns a pointer to the underlying document.
See also
- PySide2.QtWidgets.QPlainTextEdit.documentTitle()¶
- Return type:
str
This property holds the title of the document parsed from the text..
By default, this property contains an empty string.
- PySide2.QtWidgets.QPlainTextEdit.ensureCursorVisible()¶
Ensures that the cursor is visible by scrolling the text edit if necessary.
See also
- PySide2.QtWidgets.QPlainTextEdit.extraSelections()¶
- Return type:
Returns previously set extra selections.
See also
- PySide2.QtWidgets.QPlainTextEdit.find(exp[, options=QTextDocument.FindFlags()])¶
- Parameters:
exp –
PySide2.QtCore.QRegExp
options –
FindFlags
- Return type:
bool
- PySide2.QtWidgets.QPlainTextEdit.find(exp[, options=QTextDocument.FindFlags()])
- Parameters:
options –
FindFlags
- Return type:
bool
- PySide2.QtWidgets.QPlainTextEdit.find(exp[, options=QTextDocument.FindFlags()])
- Parameters:
exp – str
options –
FindFlags
- Return type:
bool
- PySide2.QtWidgets.QPlainTextEdit.firstVisibleBlock()¶
- Return type:
Returns the first visible block.
See also
- PySide2.QtWidgets.QPlainTextEdit.getPaintContext()¶
-
Returns the paint context for the
viewport()
, useful only when reimplementingpaintEvent()
.
- PySide2.QtWidgets.QPlainTextEdit.inputMethodQuery(query, argument)¶
- Parameters:
query –
InputMethodQuery
argument – object
- Return type:
object
- PySide2.QtWidgets.QPlainTextEdit.insertFromMimeData(source)¶
- Parameters:
source –
PySide2.QtCore.QMimeData
This function inserts the contents of the MIME data object, specified by
source
, into the text edit at the current cursor position. It is called whenever text is inserted as the result of a clipboard paste operation, or when the text edit accepts data from a drag and drop operation.
- PySide2.QtWidgets.QPlainTextEdit.insertPlainText(text)¶
- Parameters:
text – str
Convenience slot that inserts
text
at the current cursor position.It is equivalent to
edit.textCursor().insertText(text)
- PySide2.QtWidgets.QPlainTextEdit.isReadOnly()¶
- Return type:
bool
This property holds whether the text edit is read-only.
In a read-only text edit the user can only navigate through the text and select text; modifying the text is not possible.
This property’s default is false.
- PySide2.QtWidgets.QPlainTextEdit.isUndoRedoEnabled()¶
- Return type:
bool
This property holds whether undo and redo are enabled.
Users are only able to undo or redo actions if this property is true, and if there is an action that can be undone (or redone).
By default, this property is
true
.
- PySide2.QtWidgets.QPlainTextEdit.lineWrapMode()¶
- Return type:
This property holds the line wrap mode.
The default mode is
WidgetWidth
which causes words to be wrapped at the right edge of the text edit. Wrapping occurs at whitespace, keeping whole words intact. If you want wrapping to occur within words usesetWordWrapMode()
.
- PySide2.QtWidgets.QPlainTextEdit.loadResource(type, name)¶
- Parameters:
type – int
name –
PySide2.QtCore.QUrl
- Return type:
object
Loads the resource specified by the given
type
andname
.This function is an extension of
loadResource()
.See also
loadResource()
- PySide2.QtWidgets.QPlainTextEdit.maximumBlockCount()¶
- Return type:
int
This property holds the limit for blocks in the document..
Specifies the maximum number of blocks the document may have. If there are more blocks in the document that specified with this property blocks are removed from the beginning of the document.
A negative or zero value specifies that the document may contain an unlimited amount of blocks.
The default value is 0.
Note that setting this property will apply the limit immediately to the document contents. Setting this property also disables the undo redo history.
- PySide2.QtWidgets.QPlainTextEdit.mergeCurrentCharFormat(modifier)¶
- Parameters:
modifier –
PySide2.QtGui.QTextCharFormat
Merges the properties specified in
modifier
into the current character format by callingmergeCharFormat
on the editor’s cursor. If the editor has a selection then the properties ofmodifier
are directly applied to the selection.See also
mergeCharFormat()
- PySide2.QtWidgets.QPlainTextEdit.modificationChanged(arg__1)¶
- Parameters:
arg__1 – bool
- PySide2.QtWidgets.QPlainTextEdit.moveCursor(operation[, mode=QTextCursor.MoveAnchor])¶
- Parameters:
operation –
MoveOperation
mode –
MoveMode
Moves the cursor by performing the given
operation
.If
mode
isKeepAnchor
, the cursor selects the text it moves over. This is the same effect that the user achieves when they hold down the Shift key and move the cursor with the cursor keys.See also
movePosition()
- PySide2.QtWidgets.QPlainTextEdit.overwriteMode()¶
- Return type:
bool
This property holds whether text entered by the user will overwrite existing text.
As with many text editors, the plain text editor widget can be configured to insert or overwrite existing text with new text entered by the user.
If this property is
true
, existing text is overwritten, character-for-character by new text; otherwise, text is inserted at the cursor position, displacing existing text.By default, this property is
false
(new text does not overwrite existing text).
- PySide2.QtWidgets.QPlainTextEdit.paste()¶
Pastes the text from the clipboard into the text edit at the current cursor position.
If there is no text in the clipboard nothing happens.
To change the behavior of this function, i.e. to modify what
QPlainTextEdit
can paste and how it is being pasted, reimplement the virtualcanInsertFromMimeData()
andinsertFromMimeData()
functions.
- PySide2.QtWidgets.QPlainTextEdit.placeholderText()¶
- Return type:
str
This property holds the editor placeholder text.
Setting this property makes the editor display a grayed-out placeholder text as long as the
document()
is empty.By default, this property contains an empty string.
See also
- PySide2.QtWidgets.QPlainTextEdit.print_(printer)¶
- Parameters:
printer –
PySide2.QtGui.QPagedPaintDevice
Convenience function to print the text edit’s document to the given
printer
. This is equivalent to calling the print method on the document directly except that this function also supportsSelection
as print range.See also
print()
- PySide2.QtWidgets.QPlainTextEdit.redo()¶
Redoes the last operation.
If there is no operation to redo, i.e. there is no redo step in the undo/redo history, nothing happens.
See also
- PySide2.QtWidgets.QPlainTextEdit.redoAvailable(b)¶
- Parameters:
b – bool
- PySide2.QtWidgets.QPlainTextEdit.selectAll()¶
Selects all text.
See also
- PySide2.QtWidgets.QPlainTextEdit.selectionChanged()¶
- PySide2.QtWidgets.QPlainTextEdit.setBackgroundVisible(visible)¶
- Parameters:
visible – bool
This property holds whether the palette background is visible outside the document area.
If set to true, the plain text edit paints the palette background on the viewport area not covered by the text document. Otherwise, if set to false, it won’t. The feature makes it possible for the user to visually distinguish between the area of the document, painted with the base color of the palette, and the empty area not covered by any document.
The default is false.
- PySide2.QtWidgets.QPlainTextEdit.setCenterOnScroll(enabled)¶
- Parameters:
enabled – bool
This property holds whether the cursor should be centered on screen.
If set to true, the plain text edit scrolls the document vertically to make the cursor visible at the center of the viewport. This also allows the text edit to scroll below the end of the document. Otherwise, if set to false, the plain text edit scrolls the smallest amount possible to ensure the cursor is visible. The same algorithm is applied to any new line appended through
appendPlainText()
.The default is false.
See also
- PySide2.QtWidgets.QPlainTextEdit.setCurrentCharFormat(format)¶
- Parameters:
format –
PySide2.QtGui.QTextCharFormat
Sets the char format that is be used when inserting new text to
format
by callingsetCharFormat()
on the editor’s cursor. If the editor has a selection then the char format is directly applied to the selection.See also
- PySide2.QtWidgets.QPlainTextEdit.setCursorWidth(width)¶
- Parameters:
width – int
This property specifies the width of the cursor in pixels. The default value is 1.
- PySide2.QtWidgets.QPlainTextEdit.setDocument(document)¶
- Parameters:
document –
PySide2.QtGui.QTextDocument
Makes
document
the new document of the text editor.The parent
QObject
of the provided document remains the owner of the object. If the current document is a child of the text editor, then it is deleted.The document must have a document layout that inherits
QPlainTextDocumentLayout
(seesetDocumentLayout()
).See also
- PySide2.QtWidgets.QPlainTextEdit.setDocumentTitle(title)¶
- Parameters:
title – str
This property holds the title of the document parsed from the text..
By default, this property contains an empty string.
- PySide2.QtWidgets.QPlainTextEdit.setExtraSelections(selections)¶
- Parameters:
selections –
This function allows temporarily marking certain regions in the document with a given color, specified as
selections
. This can be useful for example in a programming editor to mark a whole line of text with a given background color to indicate the existence of a breakpoint.See also
ExtraSelection
extraSelections()
- PySide2.QtWidgets.QPlainTextEdit.setLineWrapMode(mode)¶
- Parameters:
mode –
LineWrapMode
This property holds the line wrap mode.
The default mode is
WidgetWidth
which causes words to be wrapped at the right edge of the text edit. Wrapping occurs at whitespace, keeping whole words intact. If you want wrapping to occur within words usesetWordWrapMode()
.
- PySide2.QtWidgets.QPlainTextEdit.setMaximumBlockCount(maximum)¶
- Parameters:
maximum – int
This property holds the limit for blocks in the document..
Specifies the maximum number of blocks the document may have. If there are more blocks in the document that specified with this property blocks are removed from the beginning of the document.
A negative or zero value specifies that the document may contain an unlimited amount of blocks.
The default value is 0.
Note that setting this property will apply the limit immediately to the document contents. Setting this property also disables the undo redo history.
- PySide2.QtWidgets.QPlainTextEdit.setOverwriteMode(overwrite)¶
- Parameters:
overwrite – bool
This property holds whether text entered by the user will overwrite existing text.
As with many text editors, the plain text editor widget can be configured to insert or overwrite existing text with new text entered by the user.
If this property is
true
, existing text is overwritten, character-for-character by new text; otherwise, text is inserted at the cursor position, displacing existing text.By default, this property is
false
(new text does not overwrite existing text).
- PySide2.QtWidgets.QPlainTextEdit.setPlaceholderText(placeholderText)¶
- Parameters:
placeholderText – str
This property holds the editor placeholder text.
Setting this property makes the editor display a grayed-out placeholder text as long as the
document()
is empty.By default, this property contains an empty string.
See also
- PySide2.QtWidgets.QPlainTextEdit.setPlainText(text)¶
- Parameters:
text – str
This property gets and sets the plain text editor’s contents. The previous contents are removed and undo/redo history is reset when this property is set.
currentCharFormat()
is also reset, unlesstextCursor()
is already at the beginning of the document.By default, for an editor with no contents, this property contains an empty string.
- PySide2.QtWidgets.QPlainTextEdit.setReadOnly(ro)¶
- Parameters:
ro – bool
This property holds whether the text edit is read-only.
In a read-only text edit the user can only navigate through the text and select text; modifying the text is not possible.
This property’s default is false.
- PySide2.QtWidgets.QPlainTextEdit.setTabChangesFocus(b)¶
- Parameters:
b – bool
This property holds whether Tab changes focus or is accepted as input.
In some occasions text edits should not allow the user to input tabulators or change indentation using the Tab key, as this breaks the focus chain. The default is false.
- PySide2.QtWidgets.QPlainTextEdit.setTabStopDistance(distance)¶
- Parameters:
distance – float
This property holds the tab stop distance in pixels.
By default, this property contains a value of 80.
- PySide2.QtWidgets.QPlainTextEdit.setTabStopWidth(width)¶
- Parameters:
width – int
Note
This function is deprecated.
This property holds the tab stop width in pixels in Qt 5.10. Use
tabStopDistance
instead..By default, this property contains a value of 80.
- PySide2.QtWidgets.QPlainTextEdit.setTextCursor(cursor)¶
- Parameters:
cursor –
PySide2.QtGui.QTextCursor
Sets the visible
cursor
.See also
- PySide2.QtWidgets.QPlainTextEdit.setTextInteractionFlags(flags)¶
- Parameters:
flags –
TextInteractionFlags
Specifies how the label should interact with user input if it displays text.
If the flags contain either
LinksAccessibleByKeyboard
orTextSelectableByKeyboard
then the focus policy is also automatically set toClickFocus
.The default value depends on whether the
QPlainTextEdit
is read-only or editable.
- PySide2.QtWidgets.QPlainTextEdit.setUndoRedoEnabled(enable)¶
- Parameters:
enable – bool
This property holds whether undo and redo are enabled.
Users are only able to undo or redo actions if this property is true, and if there is an action that can be undone (or redone).
By default, this property is
true
.
- PySide2.QtWidgets.QPlainTextEdit.tabChangesFocus()¶
- Return type:
bool
This property holds whether Tab changes focus or is accepted as input.
In some occasions text edits should not allow the user to input tabulators or change indentation using the Tab key, as this breaks the focus chain. The default is false.
- PySide2.QtWidgets.QPlainTextEdit.tabStopDistance()¶
- Return type:
float
This property holds the tab stop distance in pixels.
By default, this property contains a value of 80.
- PySide2.QtWidgets.QPlainTextEdit.tabStopWidth()¶
- Return type:
int
Note
This function is deprecated.
This property holds the tab stop width in pixels in Qt 5.10. Use
tabStopDistance
instead..By default, this property contains a value of 80.
- PySide2.QtWidgets.QPlainTextEdit.textChanged()¶
- PySide2.QtWidgets.QPlainTextEdit.textCursor()¶
- Return type:
Returns a copy of the
QTextCursor
that represents the currently visible cursor. Note that changes on the returned cursor do not affectQPlainTextEdit
‘s cursor; usesetTextCursor()
to update the visible cursor.See also
- PySide2.QtWidgets.QPlainTextEdit.textInteractionFlags()¶
- Return type:
TextInteractionFlags
Specifies how the label should interact with user input if it displays text.
If the flags contain either
LinksAccessibleByKeyboard
orTextSelectableByKeyboard
then the focus policy is also automatically set toClickFocus
.The default value depends on whether the
QPlainTextEdit
is read-only or editable.
- PySide2.QtWidgets.QPlainTextEdit.toPlainText()¶
- Return type:
str
This property gets and sets the plain text editor’s contents. The previous contents are removed and undo/redo history is reset when this property is set.
currentCharFormat()
is also reset, unlesstextCursor()
is already at the beginning of the document.By default, for an editor with no contents, this property contains an empty string.
- PySide2.QtWidgets.QPlainTextEdit.undo()¶
Undoes the last operation.
If there is no operation to undo, i.e. there is no undo step in the undo/redo history, nothing happens.
See also
- PySide2.QtWidgets.QPlainTextEdit.undoAvailable(b)¶
- Parameters:
b – bool
- PySide2.QtWidgets.QPlainTextEdit.updateRequest(rect, dy)¶
- Parameters:
rect –
PySide2.QtCore.QRect
dy – int
- PySide2.QtWidgets.QPlainTextEdit.wordWrapMode()¶
- Return type:
See also
- PySide2.QtWidgets.QPlainTextEdit.zoomIn([range=1])¶
- Parameters:
range – int
Zooms in on the text by making the base font size
range
points larger and recalculating all font sizes to be the new size. This does not change the size of any images.See also
- PySide2.QtWidgets.QPlainTextEdit.zoomInF(range)¶
- Parameters:
range – float
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