The QGraphicsSimpleTextItem class provides a simple text path item that you can add to a QGraphicsScene . 更多...
| 頭： | #include <QGraphicsSimpleTextItem> |
| qmake: | QT += widgets |
| Since: | Qt 4.2 |
| 繼承： | QAbstractGraphicsShapeItem |
| enum | anonymous { Type } |
| QGraphicsSimpleTextItem (QGraphicsItem * parent = nullptr) | |
| QGraphicsSimpleTextItem (const QString & text , QGraphicsItem * parent = nullptr) | |
| virtual | ~QGraphicsSimpleTextItem () |
| QFont | font () const |
| void | setFont (const QFont & font ) |
| void | setText (const QString & text ) |
| QString | text () const |
| virtual QRectF | boundingRect () const override |
| virtual bool | contains (const QPointF & point ) const override |
| virtual bool | isObscuredBy (const QGraphicsItem * item ) const override |
| virtual QPainterPath | opaqueArea () const override |
| virtual void | paint (QPainter * painter , const QStyleOptionGraphicsItem * option , QWidget * widget ) override |
| virtual QPainterPath | shape () const override |
| virtual int | type () const override |
The QGraphicsSimpleTextItem class provides a simple text path item that you can add to a QGraphicsScene .
To set the item's text, you can either pass a QString to QGraphicsSimpleTextItem 's constructor, or call setText () to change the text later. To set the text fill color, call setBrush ().
The simple text item can have both a fill and an outline; setBrush () will set the text fill (i.e., text color), and setPen () sets the pen that will be used to draw the text outline. (The latter can be slow, especially for complex pens, and items with long text content.) If all you want is to draw a simple line of text, you should call setBrush () only, and leave the pen unset; QGraphicsSimpleTextItem 's pen is by default Qt::NoPen .
QGraphicsSimpleTextItem uses the text's formatted size and the associated font to provide a reasonable implementation of boundingRect (), shape ()，和 contains (). You can set the font by calling setFont ().
QGraphicsSimpleText 不顯示富文本；相反，可使用 QGraphicsTextItem ，其提供完整文本控製能力。
另請參閱 QGraphicsTextItem , QGraphicsPathItem , QGraphicsRectItem , QGraphicsEllipseItem , QGraphicsPixmapItem , QGraphicsPolygonItem , QGraphicsLineItem ，和 圖形視圖框架 .
值的返迴是通過虛擬 type () 函數。
| 常量 | 值 | 描述 |
|---|---|---|
QGraphicsSimpleTextItem::Type
|
9
|
A graphics simple text item |
parent 被傳遞給 QGraphicsItem 的構造函數。
另請參閱 QGraphicsScene::addItem ().
構造 QGraphicsSimpleTextItem ，使用 text 作為默認純文本。
parent 被傳遞給 QGraphicsItem 的構造函數。
另請參閱 QGraphicsScene::addItem ().
[虛擬]
QGraphicsSimpleTextItem::
~QGraphicsSimpleTextItem
()
[override virtual]
QRectF
QGraphicsSimpleTextItem::
boundingRect
() const
重實現自 QGraphicsItem::boundingRect ().
[override virtual]
bool
QGraphicsSimpleTextItem::
contains
(const
QPointF
&
point
) const
重實現自 QGraphicsItem::contains ().
返迴用於繪製項文本的字體。
另請參閱 setFont ().
[override virtual]
bool
QGraphicsSimpleTextItem::
isObscuredBy
(const
QGraphicsItem
*
item
) const
重實現自 QAbstractGraphicsShapeItem::isObscuredBy ().
[override virtual]
QPainterPath
QGraphicsSimpleTextItem::
opaqueArea
() const
重實現自 QAbstractGraphicsShapeItem::opaqueArea ().
[override virtual]
void
QGraphicsSimpleTextItem::
paint
(
QPainter
*
painter
, const
QStyleOptionGraphicsItem
*
option
,
QWidget
*
widget
)
重實現自 QGraphicsItem::paint ().
Sets the font that is used to draw the item's text to font .
另請參閱 font ().
Sets the item's text to text . The text will be displayed as plain text. Newline characters ('\n') as well as characters of type QChar::LineSeparator will cause item to break the text into multiple lines.
另請參閱 text ().
[override virtual]
QPainterPath
QGraphicsSimpleTextItem::
shape
() const
重實現自 QGraphicsItem::shape ().
返迴項的文本。
另請參閱 setText ().
[override virtual]
int
QGraphicsSimpleTextItem::
type
() const
重實現自 QGraphicsItem::type ().