QGraphicsTextItem 类提供的文本项可以被添加到 QGraphicsScene 以显示格式化文本。 更多...
| 头： | #include <QGraphicsTextItem> |
| qmake: | QT += widgets |
| Since: | Qt 4.2 |
| 继承： | QGraphicsObject |
该类在 Qt 4.2 引入。
| enum | anonymous { Type } |
| QGraphicsTextItem (const QString & text , QGraphicsItem * parent = nullptr) | |
| QGraphicsTextItem (QGraphicsItem * parent = nullptr) | |
| virtual | ~QGraphicsTextItem () |
| void | adjustSize () |
| QColor | defaultTextColor () const |
| QTextDocument * | document () const |
| QFont | font () const |
| bool | openExternalLinks () const |
| void | setDefaultTextColor (const QColor & col ) |
| void | setDocument (QTextDocument * document ) |
| void | setFont (const QFont & font ) |
| void | setHtml (const QString & text ) |
| void | setOpenExternalLinks (bool open ) |
| void | setPlainText (const QString & text ) |
| void | setTabChangesFocus (bool b ) |
| void | setTextCursor (const QTextCursor & cursor ) |
| void | setTextInteractionFlags (Qt::TextInteractionFlags flags ) |
| void | setTextWidth (qreal width ) |
| bool | tabChangesFocus () const |
| QTextCursor | textCursor () const |
| Qt::TextInteractionFlags | textInteractionFlags () const |
| qreal | textWidth () const |
| QString | toHtml () const |
| QString | toPlainText () 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 |
| void | linkActivated (const QString & link ) |
| void | linkHovered (const QString & link ) |
| virtual void | contextMenuEvent (QGraphicsSceneContextMenuEvent * event ) override |
| virtual void | dragEnterEvent (QGraphicsSceneDragDropEvent * event ) override |
| virtual void | dragLeaveEvent (QGraphicsSceneDragDropEvent * event ) override |
| virtual void | dragMoveEvent (QGraphicsSceneDragDropEvent * event ) override |
| virtual void | dropEvent (QGraphicsSceneDragDropEvent * event ) override |
| virtual void | focusInEvent (QFocusEvent * event ) override |
| virtual void | focusOutEvent (QFocusEvent * event ) override |
| virtual void | hoverEnterEvent (QGraphicsSceneHoverEvent * event ) override |
| virtual void | hoverLeaveEvent (QGraphicsSceneHoverEvent * event ) override |
| virtual void | hoverMoveEvent (QGraphicsSceneHoverEvent * event ) override |
| virtual void | inputMethodEvent (QInputMethodEvent * event ) override |
| virtual QVariant | inputMethodQuery (Qt::InputMethodQuery query ) const override |
| virtual void | keyPressEvent (QKeyEvent * event ) override |
| virtual void | keyReleaseEvent (QKeyEvent * event ) override |
| virtual void | mouseDoubleClickEvent (QGraphicsSceneMouseEvent * event ) override |
| virtual void | mouseMoveEvent (QGraphicsSceneMouseEvent * event ) override |
| virtual void | mousePressEvent (QGraphicsSceneMouseEvent * event ) override |
| virtual void | mouseReleaseEvent (QGraphicsSceneMouseEvent * event ) override |
| virtual bool | sceneEvent (QEvent * event ) override |
若只需要在项中展示纯文本，考虑使用 QGraphicsSimpleTextItem 代替。
To set the item's text, pass a QString to QGraphicsTextItem's constructor, or call setHtml ()/ setPlainText ().
QGraphicsTextItem 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 ().
It is possible to make the item editable by setting the Qt::TextEditorInteraction flag using setTextInteractionFlags ().
The item's preferred text width can be set using setTextWidth () and obtained using textWidth ().
注意： In order to align HTML text in the center, the item's text width must be set. Otherwise, you can call adjustSize () after setting the item's text.
注意： QGraphicsTextItem accepts 悬停事件 by default. You can change this with setAcceptHoverEvents() .
另请参阅 QGraphicsSimpleTextItem , QGraphicsPathItem , QGraphicsRectItem , QGraphicsEllipseItem , QGraphicsPixmapItem , QGraphicsPolygonItem , QGraphicsLineItem ，和 图形视图框架 .
值的返回通过虚拟 type () 函数。
| 常量 | 值 | 描述 |
|---|---|---|
QGraphicsTextItem::Type
|
8
|
A graphics text item |
指定是否 QGraphicsTextItem 应自动打开链接使用 QDesktopServices::openUrl () 而不是发射 linkActivated 信号。
默认值为 false。
访问函数：
| bool | openExternalLinks () const |
| void | setOpenExternalLinks (bool open ) |
This property represents the visible text cursor in an editable text item.
By default, if the item's text has not been set, this property contains a null text cursor; otherwise it contains a text cursor placed at the start of the item's document.
访问函数：
| QTextCursor | textCursor () const |
| void | setTextCursor (const QTextCursor & cursor ) |
Constructs a QGraphicsTextItem, using text 作为默认纯文本。 parent 会被传递给 QGraphicsItem 的构造函数。
另请参阅 QGraphicsScene::addItem ().
Constructs a QGraphicsTextItem. parent 会被传递给 QGraphicsItem 的构造函数。
另请参阅 QGraphicsScene::addItem ().
[signal]
void
QGraphicsTextItem::
linkActivated
(const
QString
&
link
)
This signal is emitted when the user clicks on a link on a text item that enables Qt::LinksAccessibleByMouse or Qt::LinksAccessibleByKeyboard . link is the link that was clicked.
另请参阅 setTextInteractionFlags ().
[signal]
void
QGraphicsTextItem::
linkHovered
(const
QString
&
link
)
This signal is emitted when the user hovers over a link on a text item that enables Qt::LinksAccessibleByMouse . link is the link that was hovered over.
另请参阅 setTextInteractionFlags ().
[虚拟]
QGraphicsTextItem::
~QGraphicsTextItem
()
销毁 QGraphicsTextItem .
Adjusts the text item to a reasonable size.
[override virtual]
QRectF
QGraphicsTextItem::
boundingRect
() const
重实现： QGraphicsItem::boundingRect () const.
[override virtual]
bool
QGraphicsTextItem::
contains
(const
QPointF
&
point
) const
重实现： QGraphicsItem::contains (const QPointF &point) const.
[override virtual protected]
void
QGraphicsTextItem::
contextMenuEvent
(
QGraphicsSceneContextMenuEvent
*
event
)
重实现： QGraphicsItem::contextMenuEvent (QGraphicsSceneContextMenuEvent *event).
Returns the default text color that is used for unformatted text.
另请参阅 setDefaultTextColor ().
返回项的文本文档。
另请参阅 setDocument ().
[override virtual protected]
void
QGraphicsTextItem::
dragEnterEvent
(
QGraphicsSceneDragDropEvent
*
event
)
重实现： QGraphicsItem::dragEnterEvent (QGraphicsSceneDragDropEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
dragLeaveEvent
(
QGraphicsSceneDragDropEvent
*
event
)
重实现： QGraphicsItem::dragLeaveEvent (QGraphicsSceneDragDropEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
dragMoveEvent
(
QGraphicsSceneDragDropEvent
*
event
)
重实现： QGraphicsItem::dragMoveEvent (QGraphicsSceneDragDropEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
dropEvent
(
QGraphicsSceneDragDropEvent
*
event
)
重实现： QGraphicsItem::dropEvent (QGraphicsSceneDragDropEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
focusInEvent
(
QFocusEvent
*
event
)
重实现： QGraphicsItem::focusInEvent (QFocusEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
focusOutEvent
(
QFocusEvent
*
event
)
重实现： QGraphicsItem::focusOutEvent (QFocusEvent *event).
Returns the item's font, which is used to render the text.
另请参阅 setFont ().
[override virtual protected]
void
QGraphicsTextItem::
hoverEnterEvent
(
QGraphicsSceneHoverEvent
*
event
)
重实现： QGraphicsItem::hoverEnterEvent (QGraphicsSceneHoverEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
hoverLeaveEvent
(
QGraphicsSceneHoverEvent
*
event
)
重实现： QGraphicsItem::hoverLeaveEvent (QGraphicsSceneHoverEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
hoverMoveEvent
(
QGraphicsSceneHoverEvent
*
event
)
重实现： QGraphicsItem::hoverMoveEvent (QGraphicsSceneHoverEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
inputMethodEvent
(
QInputMethodEvent
*
event
)
重实现： QGraphicsItem::inputMethodEvent (QInputMethodEvent *event).
[override virtual protected]
QVariant
QGraphicsTextItem::
inputMethodQuery
(
Qt::InputMethodQuery
query
) const
重实现： QGraphicsItem::inputMethodQuery (Qt::InputMethodQuery query) const.
[override virtual]
bool
QGraphicsTextItem::
isObscuredBy
(const
QGraphicsItem
*
item
) const
重实现： QGraphicsItem::isObscuredBy (const QGraphicsItem *item) const.
[override virtual protected]
void
QGraphicsTextItem::
keyPressEvent
(
QKeyEvent
*
event
)
重实现： QGraphicsItem::keyPressEvent (QKeyEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
keyReleaseEvent
(
QKeyEvent
*
event
)
重实现： QGraphicsItem::keyReleaseEvent (QKeyEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
mouseDoubleClickEvent
(
QGraphicsSceneMouseEvent
*
event
)
重实现： QGraphicsItem::mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
mouseMoveEvent
(
QGraphicsSceneMouseEvent
*
event
)
重实现： QGraphicsItem::mouseMoveEvent (QGraphicsSceneMouseEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
mousePressEvent
(
QGraphicsSceneMouseEvent
*
event
)
重实现： QGraphicsItem::mousePressEvent (QGraphicsSceneMouseEvent *event).
[override virtual protected]
void
QGraphicsTextItem::
mouseReleaseEvent
(
QGraphicsSceneMouseEvent
*
event
)
重实现： QGraphicsItem::mouseReleaseEvent (QGraphicsSceneMouseEvent *event).
[override virtual]
QPainterPath
QGraphicsTextItem::
opaqueArea
() const
重实现： QGraphicsItem::opaqueArea () const.
[override virtual]
void
QGraphicsTextItem::
paint
(
QPainter
*
painter
, const
QStyleOptionGraphicsItem
*
option
,
QWidget
*
widget
)
重实现： QGraphicsItem::paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget).
[override virtual protected]
bool
QGraphicsTextItem::
sceneEvent
(
QEvent
*
event
)
重实现： QGraphicsItem::sceneEvent (QEvent *event).
Sets the color for unformatted text to col .
另请参阅 defaultTextColor ().
Sets the text document document on the item.
另请参阅 document ().
Sets the font used to render the text item to font .
另请参阅 font ().
Sets the item's text to text , assuming that text is HTML formatted. If the item has keyboard input focus, this function will also call ensureVisible () to ensure that the text is visible in all viewports.
另请参阅 toHtml (), hasFocus ()，和 QGraphicsSimpleTextItem .
Sets the item's text to text . If the item has keyboard input focus, this function will also call ensureVisible () to ensure that the text is visible in all viewports.
若 b is true, the Tab key will cause the widget to change focus; otherwise, the tab key will insert a tab into the document.
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.
该函数在 Qt 4.5 引入。
另请参阅 tabChangesFocus (), ItemIsFocusable ，和 textInteractionFlags ().
Sets the flags flags to specify how the text item should react to user input.
The default for a QGraphicsTextItem is Qt::NoTextInteraction . This function also affects the ItemIsFocusable QGraphicsItem flag by setting it if flags is different from Qt::NoTextInteraction and clearing it otherwise.
By default, the text is read-only. To transform the item into an editor, set the Qt::TextEditable 标志。
另请参阅 textInteractionFlags ().
Sets the preferred width for the item's text. If the actual text is wider than the specified width then it will be broken into multiple lines.
若 width is set to -1 then the text will not be broken into multiple lines unless it is enforced through an explicit line break or a new paragraph.
默认值为 -1。
注意， QGraphicsTextItem keeps a QTextDocument internally, which is used to calculate the text width.
另请参阅 textWidth () 和 QTextDocument::setTextWidth ().
[override virtual]
QPainterPath
QGraphicsTextItem::
shape
() const
重实现： QGraphicsItem::shape () const.
返回
true
若
Tab
key will cause the widget to change focus; otherwise, false is returned.
By default, this behavior is disabled, and this function will return false.
该函数在 Qt 4.5 引入。
另请参阅 setTabChangesFocus ().
Returns the current text interaction flags.
另请参阅 setTextInteractionFlags ().
Returns the text width.
The width is calculated with the QTextDocument that QGraphicsTextItem keeps internally.
另请参阅 setTextWidth () 和 QTextDocument::textWidth ().
Returns the item's text converted to HTML, or an empty QString if no text has been set.
另请参阅 setHtml ().
Returns the item's text converted to plain text, or an empty QString if no text has been set.
另请参阅 setPlainText ().
[override virtual]
int
QGraphicsTextItem::
type
() const
重实现： QGraphicsItem::type () const.