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QCPItemText Class Reference

A text label. More...

Inheritance diagram for QCPItemText:

## Public Member Functions
| QCPItemText (QCustomPlot *parentPlot)
QColor | color () const
QColor | selectedColor () const
QPen | pen () const
QPen | selectedPen () const
QBrush | brush () const
QBrush | selectedBrush () const
QFont | font () const
QFont | selectedFont () const
QString | text () const
Qt::Alignment | positionAlignment () const
Qt::Alignment | textAlignment () const
double | rotation () const
QMargins | padding () const
void | setColor (const QColor &color)
void | setSelectedColor (const QColor &color)
void | setPen (const QPen &pen)
void | setSelectedPen (const QPen &pen)
void | setBrush (const QBrush &brush)
void | setSelectedBrush (const QBrush &brush)
void | setFont (const QFont &font)
void | setSelectedFont (const QFont &font)
void | setText (const QString &text)
void | setPositionAlignment (Qt::Alignment alignment)
void | setTextAlignment (Qt::Alignment alignment)
void | setRotation (double degrees)
void | setPadding (const QMargins &padding)
virtual double | selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const
Public Member Functions inherited from QCPAbstractItem
| QCPAbstractItem (QCustomPlot *parentPlot)
bool | clipToAxisRect () const
QCPAxisRect * | clipAxisRect () const
bool | selectable () const
bool | selected () const
void | setClipToAxisRect (bool clip)
void | setClipAxisRect (QCPAxisRect *rect)
Q_SLOT void | setSelectable (bool selectable)
Q_SLOT void | setSelected (bool selected)
QList< QCPItemPosition * > | positions () const
QList< QCPItemAnchor * > | anchors () const
QCPItemPosition * | position (const QString &name) const
QCPItemAnchor * | anchor (const QString &name) const
bool | hasAnchor (const QString &name) const
Public Member Functions inherited from QCPLayerable
| QCPLayerable (QCustomPlot *plot, QString targetLayer=QString(), QCPLayerable *parentLayerable=0)
bool | visible () const
QCustomPlot * | parentPlot () const
QCPLayerable * | parentLayerable () const
QCPLayer * | layer () const
bool | antialiased () const
void | setVisible (bool on)
Q_SLOT bool | setLayer (QCPLayer *layer)
bool | setLayer (const QString &layerName)
void | setAntialiased (bool enabled)
bool | realVisibility () const

## Public Attributes
QCPItemPosition *const | position
QCPItemAnchor *const | topLeft
QCPItemAnchor *const | top
QCPItemAnchor *const | topRight
QCPItemAnchor *const | right
QCPItemAnchor *const | bottomRight
QCPItemAnchor *const | bottom
QCPItemAnchor *const | bottomLeft
QCPItemAnchor *const | left

## Protected Types
enum | AnchorIndex { aiTopLeft, aiTop, aiTopRight, aiRight, aiBottomRight, aiBottom, aiBottomLeft, aiLeft }

## Protected Member Functions
virtual void | draw (QCPPainter *painter)
virtual QPointF | anchorPixelPoint (int anchorId) const
QPointF | getTextDrawPoint (const QPointF &pos, const QRectF &rect, Qt::Alignment positionAlignment) const
QFont | mainFont () const
QColor | mainColor () const
QPen | mainPen () const
QBrush | mainBrush () const
Protected Member Functions inherited from QCPAbstractItem
virtual QCP::Interaction | selectionCategory () const
virtual QRect | clipRect () const
virtual void | applyDefaultAntialiasingHint (QCPPainter *painter) const
virtual void | selectEvent (QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged)
virtual void | deselectEvent (bool *selectionStateChanged)
double | distSqrToLine (const QPointF &start, const QPointF &end, const QPointF &point) const
double | rectSelectTest (const QRectF &rect, const QPointF &pos, bool filledRect) const
QCPItemPosition * | createPosition (const QString &name)
QCPItemAnchor * | createAnchor (const QString &name, int anchorId)
Protected Member Functions inherited from QCPLayerable
virtual void | parentPlotInitialized (QCustomPlot *parentPlot)
void | initializeParentPlot (QCustomPlot *parentPlot)
void | setParentLayerable (QCPLayerable *parentLayerable)
bool | moveToLayer (QCPLayer *layer, bool prepend)
void | applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const

## Protected Attributes
QColor | mColor
QColor | mSelectedColor
QPen | mPen
QPen | mSelectedPen
QBrush | mBrush
QBrush | mSelectedBrush
QFont | mFont
QFont | mSelectedFont
QString | mText
Qt::Alignment | mPositionAlignment
Qt::Alignment | mTextAlignment
double | mRotation
QMargins | mPadding
Protected Attributes inherited from QCPAbstractItem
bool | mClipToAxisRect
QPointer< QCPAxisRect > | mClipAxisRect
QList< QCPItemPosition * > | mPositions
QList< QCPItemAnchor * > | mAnchors
bool | mSelectable
bool | mSelected
Protected Attributes inherited from QCPLayerable
bool | mVisible
QCustomPlot * | mParentPlot
QPointer< QCPLayerable > | mParentLayerable
QCPLayer * | mLayer
bool | mAntialiased

## Additional Inherited Members
Signals inherited from QCPAbstractItem
void | selectionChanged (bool selected)
void | selectableChanged (bool selectable)
Signals inherited from QCPLayerable
void | layerChanged (QCPLayer *newLayer)

## Detailed Description

A text label.

Text example. Blue dotted circles are anchors, solid blue discs are positions.

Its position is defined by the member position and the setting of setPositionAlignment. The latter controls which part of the text rect shall be aligned with position.

The text alignment itself (i.e. left, center, right) can be controlled with setTextAlignment.

The text may be rotated around the position point with setRotation.

## Constructor & Destructor Documentation

QCPItemText::QCPItemText | ( | QCustomPlot * | parentPlot | ) |

Creates a text item and sets default values.

The constructed item can be added to the plot with QCustomPlot::addItem.

## Member Function Documentation

double QCPItemText::selectTest | ( | const QPointF & | pos,
|  | bool | onlySelectable,
|  | QVariant * | details = `0`
| ) |  | const
| virtual

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

If the item is represented not by single lines but by an area like QCPItemRect or QCPItemText, a click inside the area returns a constant value greater zero (typically the selectionTolerance of the parent QCustomPlot multiplied by 0.99). If the click lies outside the area, this function returns -1.0.

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

You may pass 0 as details to indicate that you are not interested in those selection details.

See also
  selectEvent, deselectEvent, QCustomPlot::setInteractions

Implements QCPAbstractItem.

void QCPItemText::setBrush | ( | const QBrush & | brush | ) |

Sets the brush that will be used do fill the background of the text. To disable the background, set brush to Qt::NoBrush.

See also
  setSelectedBrush, setPen, setPadding

void QCPItemText::setColor | ( | const QColor & | color | ) |

Sets the color of the text.

void QCPItemText::setFont | ( | const QFont & | font | ) |

Sets the font of the text.

See also
  setSelectedFont, setColor

void QCPItemText::setPadding | ( | const QMargins & | padding | ) |

Sets the distance between the border of the text rectangle and the text. The appearance (and visibility) of the text rectangle can be controlled with setPen and setBrush.

void QCPItemText::setPen | ( | const QPen & | pen | ) |

Sets the pen that will be used do draw a rectangular border around the text. To disable the border, set pen to Qt::NoPen.

See also
  setSelectedPen, setBrush, setPadding

void QCPItemText::setPositionAlignment | ( | Qt::Alignment | alignment | ) |

Sets which point of the text rect shall be aligned with position.

Examples:

- If alignment is `Qt::AlignHCenter | Qt::AlignTop`, the text will be positioned such that the top of the text rect will be horizontally centered on position.
- If alignment is `Qt::AlignLeft | Qt::AlignBottom`, position will indicate the bottom left corner of the text rect.

If you want to control the alignment of (multi-lined) text within the text rect, use setTextAlignment.

void QCPItemText::setRotation | ( | double | degrees | ) |

Sets the angle in degrees by which the text (and the text rectangle, if visible) will be rotated around position.

void QCPItemText::setSelectedBrush | ( | const QBrush & | brush | ) |

Sets the brush that will be used do fill the background of the text, when the item is selected. To disable the background, set brush to Qt::NoBrush.

See also
  setBrush

void QCPItemText::setSelectedColor | ( | const QColor & | color | ) |

Sets the color of the text that will be used when the item is selected.

void QCPItemText::setSelectedFont | ( | const QFont & | font | ) |

Sets the font of the text that will be used when the item is selected.

See also
  setFont

void QCPItemText::setSelectedPen | ( | const QPen & | pen | ) |

Sets the pen that will be used do draw a rectangular border around the text, when the item is selected. To disable the border, set pen to Qt::NoPen.

See also
  setPen

void QCPItemText::setText | ( | const QString & | text | ) |

Sets the text that will be displayed. Multi-line texts are supported by inserting a line break character, e.g. '
'.

See also
  setFont, setColor, setTextAlignment

void QCPItemText::setTextAlignment | ( | Qt::Alignment | alignment | ) |

Controls how (multi-lined) text is aligned inside the text rect (typically Qt::AlignLeft, Qt::AlignCenter or Qt::AlignRight).

The documentation for this class was generated from the following files:

- /home/wireshark/builders/wireshark-master/ubuntu-16.04-x64/build/ui/qt/widgets/qcustomplot.h
- /home/wireshark/builders/wireshark-master/ubuntu-16.04-x64/build/ui/qt/widgets/qcustomplot.cpp