QTextLine ¶

概要 ¶

详细描述 ¶

A text line is usually created by createLine() .

After being created, the line can be filled using the setLineWidth() or setNumColumns() functions. A line has a number of attributes including the rectangle it occupies, rect() , its coordinates, x() and y() , its textLength() , width() and naturalTextWidth() , and its ascent() and descent() relative to the text. The position of the cursor in terms of the line is available from cursorToX() and its inverse from xToCursor() . A line can be moved with setPosition() .

class QTextLine ¶

Creates an invalid line.

PySide2.QtGui.QTextLine. Edge ¶

常量	描述
QTextLine.Leading
QTextLine.Trailing

PySide2.QtGui.QTextLine. CursorPosition ¶

常量	描述
QTextLine.CursorBetweenCharacters
QTextLine.CursorOnCharacter

PySide2.QtGui.QTextLine. ascent ( ) ¶

返回类型

qreal

Returns the line’s ascent.

另请参阅

descent() height()

PySide2.QtGui.QTextLine. cursorToX ( cursorPos [ , edge=Leading ] ) ¶

参数

• cursorPos – int

• edge – Edge

返回类型

PyObject

这是重载函数。

PySide2.QtGui.QTextLine. descent ( ) ¶

返回类型

qreal

Returns the line’s descent.

另请参阅

ascent() height()

PySide2.QtGui.QTextLine. draw ( p , point [ , selection=None ] ) ¶

参数

• p – QPainter

• point – QPointF

• selection – FormatRange

Draws a line on the given painter at the specified position 。 selection is reserved for internal use.

PySide2.QtGui.QTextLine. height ( ) ¶

返回类型

qreal

Returns the line’s height. This is equal to ascent() + descent() if leading is not included. If leading is included, this equals to ascent() + descent() + leading() .

另请参阅

ascent() descent() leading() setLeadingIncluded()

PySide2.QtGui.QTextLine. horizontalAdvance ( ) ¶

返回类型

qreal

Returns the horizontal advance of the text. The advance of the text is the distance from its position to the next position at which text would naturally be drawn.

By adding the advance to the position of the text line and using this as the position of a second text line, you will be able to position the two lines side-by-side without gaps in-between.

PySide2.QtGui.QTextLine. isValid ( ) ¶

返回类型

bool

返回 true if this text line is valid; otherwise returns false .

PySide2.QtGui.QTextLine. leading ( ) ¶

返回类型

qreal

Returns the line’s leading.

另请参阅

ascent() descent() height()

PySide2.QtGui.QTextLine. leadingIncluded ( ) ¶

返回类型

bool

返回 true if positive leading is included into the line’s height; otherwise returns false .

By default, leading is not included.

另请参阅

setLeadingIncluded()

PySide2.QtGui.QTextLine. lineNumber ( ) ¶

返回类型

int

Returns the position of the line in the text engine.

PySide2.QtGui.QTextLine. naturalTextRect ( ) ¶

返回类型

QRectF

Returns the rectangle covered by the line.

PySide2.QtGui.QTextLine. naturalTextWidth ( ) ¶

返回类型

qreal

Returns the width of the line that is occupied by text. This is always <= to width() , and is the minimum width that could be used by layout() without changing the line break position.

PySide2.QtGui.QTextLine. position ( ) ¶

返回类型

QPointF

Returns the line’s position relative to the text layout’s position.

另请参阅

setPosition()

PySide2.QtGui.QTextLine. rect ( ) ¶

返回类型

QRectF

Returns the line’s bounding rectangle.

另请参阅

x() y() textLength() width()

PySide2.QtGui.QTextLine. setLeadingIncluded ( included ) ¶

参数

included – bool

Includes positive leading into the line’s height if included is true; otherwise does not include leading.

By default, leading is not included.

Note that negative leading is ignored, it must be handled in the code using the text lines by letting the lines overlap.

另请参阅

leadingIncluded()

PySide2.QtGui.QTextLine. setLineWidth ( width ) ¶

参数

width – qreal

Lays out the line with the given width . The line is filled from its starting position with as many characters as will fit into the line. In case the text cannot be split at the end of the line, it will be filled with additional characters to the next whitespace or end of the text.

PySide2.QtGui.QTextLine. setNumColumns ( columns ) ¶

参数

columns – int

Lays out the line. The line is filled from its starting position with as many characters as are specified by numColumns . In case the text cannot be split until numColumns characters, the line will be filled with as many characters to the next whitespace or end of the text.

PySide2.QtGui.QTextLine. setNumColumns ( columns , alignmentWidth ) ¶

参数

• columns – int

• alignmentWidth – qreal

Lays out the line. The line is filled from its starting position with as many characters as are specified by numColumns . In case the text cannot be split until numColumns characters, the line will be filled with as many characters to the next whitespace or end of the text. The provided alignmentWidth is used as reference width for alignment.

PySide2.QtGui.QTextLine. setPosition ( pos ) ¶

参数

pos – QPointF

Moves the line to position pos .

另请参阅

position()

PySide2.QtGui.QTextLine. textLength ( ) ¶

返回类型

int

Returns the length of the text in the line.

另请参阅

naturalTextWidth()

PySide2.QtGui.QTextLine. textStart ( ) ¶

返回类型

int

Returns the start of the line from the beginning of the string passed to the QTextLayout .

PySide2.QtGui.QTextLine. width ( ) ¶

返回类型

qreal

Returns the line’s width as specified by the layout() function.

另请参阅

naturalTextWidth() x() y() textLength() rect()

PySide2.QtGui.QTextLine. x ( ) ¶

返回类型

qreal

Returns the line’s x position.

另请参阅

rect() y() textLength() width()

PySide2.QtGui.QTextLine. xToCursor ( x [ , edge=CursorBetweenCharacters ] ) ¶

参数

• x – qreal

• edge – CursorPosition

返回类型

int

Converts the x-coordinate x , to the nearest matching cursor position, depending on the cursor position type, cpos . Note that result cursor position includes possible preedit area text.

另请参阅

cursorToX()

PySide2.QtGui.QTextLine. y ( ) ¶

返回类型

qreal

Returns the line’s y position.

另请参阅

x() rect() textLength() width()