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QgsComposerItem Class Reference

A item that forms part of a map composition. More...

#include <qgscomposeritem.h>

Inheritance diagram for QgsComposerItem:
Inheritance graph
[legend]

Public Types

enum  ItemType {
  ComposerItem = UserType + 100, ComposerArrow, ComposerItemGroup, ComposerLabel,
  ComposerLegend, ComposerMap, ComposerPaper, ComposerPicture,
  ComposerScaleBar, ComposerShape, ComposerTable, ComposerAttributeTable,
  ComposerTextTable, ComposerFrame
}
 
enum  MouseMoveAction {
  MoveItem, ResizeUp, ResizeDown, ResizeLeft,
  ResizeRight, ResizeLeftUp, ResizeRightUp, ResizeLeftDown,
  ResizeRightDown, NoAction
}
 Describes the action (move or resize in different directon) to be done during mouse move. More...
 
enum  ItemPositionMode {
  UpperLeft, UpperMiddle, UpperRight, MiddleLeft,
  Middle, MiddleRight, LowerLeft, LowerMiddle,
  LowerRight
}
 
enum  ZoomMode { Zoom = 0, ZoomRecenter, ZoomToPoint, NoZoom }
 Modes for zooming item content. More...
 
- Public Types inherited from QgsComposerObject
enum  DataDefinedProperty {
  NoProperty = 0, AllProperties, TestProperty, PresetPaperSize,
  PaperWidth, PaperHeight, NumPages, PaperOrientation,
  PageNumber, PositionX, PositionY, ItemWidth,
  ItemHeight, ItemRotation, Transparency, BlendMode,
  ExcludeFromExports, MapRotation, MapScale, MapXMin,
  MapYMin, MapXMax, MapYMax, MapAtlasMargin,
  PictureSource, SourceUrl
}
 Data defined properties for different item types. More...
 
enum  PropertyValueType { EvaluatedValue = 0, OriginalValue }
 Specifies whether the value returned by a function should be the original, user set value, or the current evaluated value for the property. More...
 

Public Slots

virtual void setRotation (double r)
 Sets the item rotation. More...
 
virtual void setItemRotation (const double r, const bool adjustPosition=false)
 Sets the item rotation. More...
 
void repaint ()
 
virtual void refreshDataDefinedProperty (const QgsComposerObject::DataDefinedProperty property=QgsComposerObject::AllProperties)
 Refreshes a data defined property for the item by reevaluating the property's value and redrawing the item with this new value. More...
 
- Public Slots inherited from QgsComposerObject
virtual void repaint ()
 Triggers a redraw for the item. More...
 
virtual void refreshDataDefinedProperty (const DataDefinedProperty property=AllProperties)
 Refreshes a data defined property for the item by reevaluating the property's value and redrawing the item with this new value. More...
 

Signals

void itemRotationChanged (double newRotation)
 Is emitted on item rotation change. More...
 
void sizeChanged ()
 Emitted if the rectangle changes. More...
 
void frameChanged ()
 Emitted if the item's frame style changes. More...
 
void lockChanged ()
 Emitted if the item's lock status changes. More...
 
- Signals inherited from QgsComposerObject
void itemChanged ()
 Emitted when the item changes. More...
 

Public Member Functions

 QgsComposerItem (QgsComposition *composition, bool manageZValue=true)
 Constructor. More...
 
 QgsComposerItem (qreal x, qreal y, qreal width, qreal height, QgsComposition *composition, bool manageZValue=true)
 Constructor with box position and composer object. More...
 
virtual ~QgsComposerItem ()
 
virtual int type () const
 return correct graphics item type. More...
 
virtual bool isRemoved () const
 Returns whether this item has been removed from the composition. More...
 
void setIsRemoved (const bool removed)
 Sets whether this item has been removed from the composition. More...
 
virtual void setSelected (bool s)
 Set selected, selected item should be highlighted. More...
 
virtual bool selected () const
 Is selected. More...
 
void move (double dx, double dy)
 Moves item in canvas coordinates. More...
 
virtual void moveContent (double dx, double dy)
 Move Content of item. More...
 
virtual Q_DECL_DEPRECATED void zoomContent (int delta, double x, double y)
 Zoom content of item. More...
 
virtual void zoomContent (const double factor, const QPointF point, const ZoomMode mode=QgsComposerItem::Zoom)
 Zoom content of item. More...
 
int page () const
 Gets the page the item is currently on. More...
 
QPointF pagePos () const
 Returns the item's position relative to its current page. More...
 
void updatePagePos (double newPageWidth, double newPageHeight)
 Moves the item so that it retains its relative position on the page when the paper size changes. More...
 
void setItemPosition (double x, double y, ItemPositionMode itemPoint=UpperLeft, int page=-1)
 Moves the item to a new position (in canvas coordinates) More...
 
void setItemPosition (double x, double y, double width, double height, ItemPositionMode itemPoint=UpperLeft, bool posIncludesFrame=false, int page=-1)
 Sets item position and width / height in one go. More...
 
ItemPositionMode lastUsedPositionMode ()
 Returns item's last used position mode. More...
 
virtual void setSceneRect (const QRectF &rectangle)
 Sets this items bound in scene coordinates such that 1 item size units corresponds to 1 scene size unit. More...
 
bool _writeXML (QDomElement &itemElem, QDomDocument &doc) const
 Writes parameter that are not subclass specific in document. More...
 
bool _readXML (const QDomElement &itemElem, const QDomDocument &doc)
 Reads parameter that are not subclass specific in document. More...
 
bool hasFrame () const
 Whether this item has a frame or not. More...
 
void setFrameEnabled (const bool drawFrame)
 Set whether this item has a frame drawn around it or not. More...
 
virtual void setFrameOutlineColor (const QColor &color)
 Sets frame outline color. More...
 
QColor frameOutlineColor () const
 Returns the frame's outline color. More...
 
virtual void setFrameOutlineWidth (const double outlineWidth)
 Sets frame outline width. More...
 
double frameOutlineWidth () const
 Returns the frame's outline width. More...
 
Qt::PenJoinStyle frameJoinStyle () const
 Returns the join style used for drawing the item's frame. More...
 
void setFrameJoinStyle (const Qt::PenJoinStyle style)
 Sets join style used when drawing the item's frame. More...
 
virtual double estimatedFrameBleed () const
 Returns the estimated amount the item's frame bleeds outside the item's actual rectangle. More...
 
virtual QRectF rectWithFrame () const
 Returns the item's rectangular bounds, including any bleed caused by the item's frame. More...
 
bool hasBackground () const
 Whether this item has a Background or not. More...
 
void setBackgroundEnabled (const bool drawBackground)
 Set whether this item has a Background drawn around it or not. More...
 
QColor backgroundColor () const
 Gets the background color for this item. More...
 
void setBackgroundColor (const QColor &backgroundColor)
 Sets the background color for this item. More...
 
QPainter::CompositionMode blendMode () const
 Returns the item's composition blending mode. More...
 
void setBlendMode (const QPainter::CompositionMode blendMode)
 Sets the item's composition blending mode. More...
 
int transparency () const
 Returns the item's transparency. More...
 
void setTransparency (const int transparency)
 Sets the item's transparency. More...
 
bool effectsEnabled () const
 Returns whether effects (eg blend modes) are enabled for the item. More...
 
void setEffectsEnabled (const bool effectsEnabled)
 Sets whether effects (eg blend modes) are enabled for the item. More...
 
virtual void addItem (QgsComposerItem *item)
 Composite operations for item groups do nothing per default. More...
 
virtual void removeItems ()
 
virtual void beginItemCommand (const QString &text)
 
void beginCommand (const QString &commandText, QgsComposerMergeCommand::Context c=QgsComposerMergeCommand::Unknown)
 Starts new composer undo command. More...
 
virtual void endItemCommand ()
 
void endCommand ()
 Finish current command and push it onto the undo stack. More...
 
void cancelCommand ()
 
Q_DECL_DEPRECATED void drawText (QPainter *p, double x, double y, const QString &text, const QFont &font, const QColor &c=QColor()) const
 Draws Text. More...
 
Q_DECL_DEPRECATED void drawText (QPainter *p, const QRectF &rect, const QString &text, const QFont &font, Qt::AlignmentFlag halignment=Qt::AlignLeft, Qt::AlignmentFlag valignment=Qt::AlignTop, int flags=Qt::TextWordWrap) const
 Like the above, but with a rectangle for multiline text. More...
 
Q_DECL_DEPRECATED double textWidthMillimeters (const QFont &font, const QString &text) const
 Returns the font width in millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE. More...
 
Q_DECL_DEPRECATED double fontHeightCharacterMM (const QFont &font, const QChar &c) const
 Returns the font height of a character in millimeters. More...
 
Q_DECL_DEPRECATED double fontAscentMillimeters (const QFont &font) const
 Returns the font ascent in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE. More...
 
Q_DECL_DEPRECATED double fontDescentMillimeters (const QFont &font) const
 Returns the font descent in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE. More...
 
Q_DECL_DEPRECATED double fontHeightMillimeters (const QFont &font) const
 Returns the font height in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE. More...
 
Q_DECL_DEPRECATED double pixelFontSize (double pointSize) const
 Calculates font size in mm from a font point size. More...
 
Q_DECL_DEPRECATED QFont scaledFontPixelSize (const QFont &font) const
 Returns a font where size is in pixel and font size is upscaled with FONT_WORKAROUND_SCALE. More...
 
void setPositionLock (const bool lock)
 Locks / unlocks the item position for mouse drags. More...
 
bool positionLock () const
 Returns whether position lock for mouse drags is enabled returns true if item is locked for mouse movement and resizing. More...
 
double itemRotation (const QgsComposerObject::PropertyValueType valueType=QgsComposerObject::EvaluatedValue) const
 Returns the current rotation for the composer item. More...
 
Q_DECL_DEPRECATED double rotation () const
 Returns the rotation for the composer item. More...
 
virtual void updateItem ()
 Updates item, with the possibility to do custom update for subclasses. More...
 
QString id () const
 Get item's id (which is not necessarly unique) More...
 
virtual void setId (const QString &id)
 Set item's id (which is not necessarly unique) More...
 
QString uuid () const
 Get item identification name. More...
 
virtual QString displayName () const
 Get item display name. More...
 
virtual void setVisibility (const bool visible)
 Sets visibility for item. More...
 
bool excludeFromExports (const QgsComposerObject::PropertyValueType valueType=QgsComposerObject::EvaluatedValue)
 Returns whether the item should be excluded from composer exports and prints. More...
 
virtual void setExcludeFromExports (const bool exclude)
 Sets whether the item should be excluded from composer exports and prints. More...
 
bool isGroupMember () const
 Returns whether this item is part of a group. More...
 
void setIsGroupMember (const bool isGroupMember)
 Sets whether this item is part of a group. More...
 
virtual int numberExportLayers () const
 Get the number of layers that this item requires for exporting as layers. More...
 
virtual void setCurrentExportLayer (const int layerIdx=-1)
 Sets the current layer to draw for exporting. More...
 
- Public Member Functions inherited from QgsComposerObject
 QgsComposerObject (QgsComposition *composition)
 Constructor. More...
 
virtual ~QgsComposerObject ()
 
const QgsCompositioncomposition () const
 Returns the composition the item is attached to. More...
 
QgsCompositioncomposition ()
 
virtual bool writeXML (QDomElement &elem, QDomDocument &doc) const
 Stores item state in DOM element. More...
 
virtual bool readXML (const QDomElement &itemElem, const QDomDocument &doc)
 Sets item state from DOM element. More...
 
QgsDataDefineddataDefinedProperty (const DataDefinedProperty property) const
 Returns a reference to the data defined settings for one of the item's data defined properties. More...
 
void setDataDefinedProperty (const DataDefinedProperty property, const bool active, const bool useExpression, const QString &expression, const QString &field)
 Sets parameters for a data defined property for the item. More...
 

Protected Member Functions

virtual void drawSelectionBoxes (QPainter *p)
 Draws additional graphics on selected items. More...
 
virtual void drawFrame (QPainter *p)
 Draw black frame around item. More...
 
virtual void drawBackground (QPainter *p)
 Draw background. More...
 
Q_DECL_DEPRECATED void drawArrowHead (QPainter *p, double x, double y, double angle, double arrowHeadWidth) const
 Draws arrowhead. More...
 
Q_DECL_DEPRECATED double angle (const QPointF &p1, const QPointF &p2) const
 Returns angle of the line from p1 to p2 (clockwise, starting at N) More...
 
double rectHandlerBorderTolerance () const
 Returns the current (zoom level dependent) tolerance to decide if mouse position is close enough to the item border for resizing. More...
 
Q_DECL_DEPRECATED double lockSymbolSize () const
 Returns the size of the lock symbol depending on the composer zoom level and the item size. More...
 
double horizontalViewScaleFactor () const
 Returns the zoom factor of the graphics view. More...
 
Q_DECL_DEPRECATED bool imageSizeConsideringRotation (double &width, double &height, double rotation) const
 Calculates width and hight of the picture (in mm) such that it fits into the item frame with the given rotation. More...
 
Q_DECL_DEPRECATED bool imageSizeConsideringRotation (double &width, double &height) const
 Calculates width and hight of the picture (in mm) such that it fits into the item frame with the given rotation. More...
 
Q_DECL_DEPRECATED QRectF largestRotatedRectWithinBounds (QRectF originalRect, QRectF boundsRect, double rotation) const
 Calculates the largest scaled version of originalRect which fits within boundsRect, when it is rotated by a specified amount. More...
 
Q_DECL_DEPRECATED bool cornerPointOnRotatedAndScaledRect (double &x, double &y, double width, double height, double rotation) const
 Calculates corner point after rotation and scaling. More...
 
Q_DECL_DEPRECATED bool cornerPointOnRotatedAndScaledRect (double &x, double &y, double width, double height) const
 Calculates corner point after rotation and scaling. More...
 
Q_DECL_DEPRECATED void sizeChangedByRotation (double &width, double &height, double rotation)
 Calculates width / height of the bounding box of a rotated rectangle. More...
 
Q_DECL_DEPRECATED void sizeChangedByRotation (double &width, double &height)
 Calculates width / height of the bounding box of a rotated rectangle. More...
 
Q_DECL_DEPRECATED void rotate (double angle, double &x, double &y) const
 Rotates a point / vector. More...
 
QGraphicsLineItem * hAlignSnapItem ()
 Return horizontal align snap item. More...
 
void deleteHAlignSnapItem ()
 
QGraphicsLineItem * vAlignSnapItem ()
 Return vertical align snap item. More...
 
void deleteVAlignSnapItem ()
 
void deleteAlignItems ()
 
QRectF evalItemRect (const QRectF &newRect, const bool resizeOnly=false)
 Evaluates an item's bounding rect to consider data defined position and size of item and reference point. More...
 
bool shouldDrawItem () const
 Returns whether the item should be drawn in the current context. More...
 
- Protected Member Functions inherited from QgsComposerObject
bool dataDefinedEvaluate (const QgsComposerObject::DataDefinedProperty property, QVariant &expressionValue)
 Evaluate a data defined property and return the calculated value. More...
 

Protected Attributes

bool mRemovedFromComposition
 True if item has been removed from the composition. More...
 
QgsComposerItem::MouseMoveAction mCurrentMouseMoveAction
 
QPointF mMouseMoveStartPos
 Start point of the last mouse move action (in scene coordinates) More...
 
QPointF mLastMouseEventPos
 Position of the last mouse move event (in scene coordinates) More...
 
QGraphicsRectItem * mBoundingResizeRectangle
 Rectangle used during move and resize actions. More...
 
QGraphicsLineItem * mHAlignSnapItem
 
QGraphicsLineItem * mVAlignSnapItem
 
bool mFrame
 True if item fram needs to be painted. More...
 
bool mBackground
 True if item background needs to be painted. More...
 
QColor mBackgroundColor
 Background color. More...
 
Qt::PenJoinStyle mFrameJoinStyle
 Frame join style. More...
 
bool mItemPositionLocked
 True if item position and size cannot be changed with mouse move. More...
 
double mLastValidViewScaleFactor
 Backup to restore item appearance if no view scale factor is available. More...
 
double mItemRotation
 Item rotation in degrees, clockwise. More...
 
double mEvaluatedItemRotation
 Temporary evaluated item rotation in degrees, clockwise. More...
 
QPainter::CompositionMode mBlendMode
 Composition blend mode for item. More...
 
bool mEffectsEnabled
 
QgsComposerEffectmEffect
 
int mTransparency
 Item transparency. More...
 
bool mExcludeFromExports
 Whether item should be excluded in exports. More...
 
bool mEvaluatedExcludeFromExports
 Temporary evaluated item exclusion. More...
 
ItemPositionMode mLastUsedPositionMode
 The item's position mode. More...
 
bool mIsGroupMember
 Whether or not this item is part of a group. More...
 
int mCurrentExportLayer
 The layer that needs to be exported. More...
 
- Protected Attributes inherited from QgsComposerObject
QgsCompositionmComposition
 
QMap
< QgsComposerObject::DataDefinedProperty,
QString > 
mDataDefinedNames
 Map of data defined properties for the item to string name to use when exporting item to xml. More...
 

Friends

class QgsComposerItemGroup
 

Detailed Description

A item that forms part of a map composition.

Constructor & Destructor Documentation

QgsComposerItem::QgsComposerItem ( QgsComposition composition,
bool  manageZValue = true 
)

Constructor.

Parameters
compositionparent composition
manageZValuetrue if the z-Value of this object should be managed by mComposition
QgsComposerItem::QgsComposerItem ( qreal  x,
qreal  y,
qreal  width,
qreal  height,
QgsComposition composition,
bool  manageZValue = true 
)

Constructor with box position and composer object.

Parameters
xx coordinate of item
yy coordinate of item
widthwidth of item
heightheight of item
compositionparent composition
manageZValuetrue if the z-Value of this object should be managed by mComposition
QgsComposerItem::~QgsComposerItem ( )
virtual

Member Function Documentation

bool QgsComposerItem::_readXML ( const QDomElement &  itemElem,
const QDomDocument &  doc 
)

Reads parameter that are not subclass specific in document.

Usually called from readXML methods of subclasses

bool QgsComposerItem::_writeXML ( QDomElement &  itemElem,
QDomDocument &  doc 
) const

Writes parameter that are not subclass specific in document.

Usually called from writeXML methods of subclasses

virtual void QgsComposerItem::addItem ( QgsComposerItem item)
inlinevirtual

Composite operations for item groups do nothing per default.

Reimplemented in QgsComposerItemGroup.

double QgsComposerItem::angle ( const QPointF &  p1,
const QPointF &  p2 
) const
protected

Returns angle of the line from p1 to p2 (clockwise, starting at N)

Deprecated:
use QgsComposerUtils::angle instead
QColor QgsComposerItem::backgroundColor ( ) const
inline

Gets the background color for this item.

Returns
background color
Note
introduced in 2.0
See also
setBackgroundColor
hasBackground
void QgsComposerItem::beginCommand ( const QString &  commandText,
QgsComposerMergeCommand::Context  c = QgsComposerMergeCommand::Unknown 
)

Starts new composer undo command.

Parameters
commandTextcommand title
ccontext for mergeable commands (unknown for non-mergeable commands
virtual void QgsComposerItem::beginItemCommand ( const QString &  text)
inlinevirtual

Reimplemented in QgsComposerFrame.

QPainter::CompositionMode QgsComposerItem::blendMode ( ) const
inline

Returns the item's composition blending mode.

Returns
item blending mode
See also
setBlendMode
void QgsComposerItem::cancelCommand ( )
bool QgsComposerItem::cornerPointOnRotatedAndScaledRect ( double &  x,
double &  y,
double  width,
double  height,
double  rotation 
) const
protected

Calculates corner point after rotation and scaling.

Deprecated:
will be removed in QGIS 3.0
bool QgsComposerItem::cornerPointOnRotatedAndScaledRect ( double &  x,
double &  y,
double  width,
double  height 
) const
protected

Calculates corner point after rotation and scaling.

Deprecated:
will be removed in QGIS 3.0
void QgsComposerItem::deleteAlignItems ( )
protected
void QgsComposerItem::deleteHAlignSnapItem ( )
protected
void QgsComposerItem::deleteVAlignSnapItem ( )
protected
QString QgsComposerItem::displayName ( ) const
virtual

Get item display name.

This is the item's id if set, and if not, a user-friendly string identifying item type.

Returns
display name for item
See also
id
setId
Note
added in version 2.5

Reimplemented in QgsComposerMap, QgsComposerLegend, QgsComposerLabel, QgsComposerShape, and QgsComposerFrame.

void QgsComposerItem::drawArrowHead ( QPainter *  p,
double  x,
double  y,
double  angle,
double  arrowHeadWidth 
) const
protected

Draws arrowhead.

Deprecated:
use QgsComposerUtils::drawArrowHead instead
void QgsComposerItem::drawBackground ( QPainter *  p)
protectedvirtual

Draw background.

Reimplemented in QgsComposerShape.

void QgsComposerItem::drawFrame ( QPainter *  p)
protectedvirtual

Draw black frame around item.

Reimplemented in QgsComposerShape, and QgsComposerItemGroup.

void QgsComposerItem::drawSelectionBoxes ( QPainter *  p)
protectedvirtual

Draws additional graphics on selected items.

The base implementation has no effect.

void QgsComposerItem::drawText ( QPainter *  p,
double  x,
double  y,
const QString &  text,
const QFont &  font,
const QColor &  c = QColor() 
) const

Draws Text.

Takes care about all the composer specific issues (calculation to pixel, scaling of font and painter to work around the Qt font bug)

Deprecated:
use QgsComposerUtils::drawText instead
void QgsComposerItem::drawText ( QPainter *  p,
const QRectF &  rect,
const QString &  text,
const QFont &  font,
Qt::AlignmentFlag  halignment = Qt::AlignLeft,
Qt::AlignmentFlag  valignment = Qt::AlignTop,
int  flags = Qt::TextWordWrap 
) const

Like the above, but with a rectangle for multiline text.

Parameters
ppainter to use
rectrectangle to draw into
texttext to draw
fontfont to use
halignmentoptional horizontal alignment
valignmentoptional vertical alignment
flagsallows for passing Qt::TextFlags to control appearance of rendered text
Deprecated:
use QgsComposerUtils::drawText instead
bool QgsComposerItem::effectsEnabled ( ) const
inline

Returns whether effects (eg blend modes) are enabled for the item.

Returns
true if effects are enabled
Note
introduced in 2.0
See also
setEffectsEnabled
transparency
blendMode
void QgsComposerItem::endCommand ( )

Finish current command and push it onto the undo stack.

virtual void QgsComposerItem::endItemCommand ( )
inlinevirtual

Reimplemented in QgsComposerFrame.

double QgsComposerItem::estimatedFrameBleed ( ) const
virtual

Returns the estimated amount the item's frame bleeds outside the item's actual rectangle.

For instance, if the item has a 2mm frame outline, then 1mm of this frame is drawn outside the item's rect. In this case the return value will be 1.0

Note
introduced in 2.2
See also
rectWithFrame

Reimplemented in QgsComposerShape.

QRectF QgsComposerItem::evalItemRect ( const QRectF &  newRect,
const bool  resizeOnly = false 
)
protected

Evaluates an item's bounding rect to consider data defined position and size of item and reference point.

Parameters
newRecttarget bouding rect for item
resizeOnlyset to true if the item is only being resized. If true then the position of the returned rect will be adjusted to account for the item's position mode
Returns
bounding box rectangle for item after data defined size and position have been set and position mode has been accounted for
Note
added in QGIS 2.5
bool QgsComposerItem::excludeFromExports ( const QgsComposerObject::PropertyValueType  valueType = QgsComposerObject::EvaluatedValue)

Returns whether the item should be excluded from composer exports and prints.

Parameters
valueTypecontrols whether the returned value is the user specified vaule, or the current evaluated value (which may be affected by data driven settings).
Returns
true if item should be excluded
Note
added in version 2.5
See also
setExcludeFromExports
double QgsComposerItem::fontAscentMillimeters ( const QFont &  font) const

Returns the font ascent in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.

Deprecated:
use QgsComposerUtils::fontAscentMM instead
double QgsComposerItem::fontDescentMillimeters ( const QFont &  font) const

Returns the font descent in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.

Deprecated:
use QgsComposerUtils::fontDescentMM instead
double QgsComposerItem::fontHeightCharacterMM ( const QFont &  font,
const QChar &  c 
) const

Returns the font height of a character in millimeters.

Note
this method was added in version 1.7
Deprecated:
use QgsComposerUtils::fontHeightCharacterMM instead
double QgsComposerItem::fontHeightMillimeters ( const QFont &  font) const

Returns the font height in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.

Font height equals the font ascent+descent+1 (for baseline).

Note
Added in version 2.4
Deprecated:
use QgsComposerUtils::fontHeightMM instead
void QgsComposerItem::frameChanged ( )
signal

Emitted if the item's frame style changes.

Note
: this function was introduced in version 2.2
Qt::PenJoinStyle QgsComposerItem::frameJoinStyle ( ) const
inline

Returns the join style used for drawing the item's frame.

Returns
Join style for outline frame
Note
introduced in 2.3
See also
hasFrame
setFrameJoinStyle
frameOutlineWidth
frameOutlineColor
QColor QgsComposerItem::frameOutlineColor ( ) const
inline

Returns the frame's outline color.

Only used if hasFrame is true.

Returns
frame outline color
Note
introduced in 2.6
See also
hasFrame
setFrameOutlineColor
frameJoinStyle
setFrameOutlineColor
double QgsComposerItem::frameOutlineWidth ( ) const
inline

Returns the frame's outline width.

Only used if hasFrame is true.

Returns
Frame outline width
Note
introduced in 2.3
See also
hasFrame
setFrameOutlineWidth
frameJoinStyle
frameOutlineColor
QGraphicsLineItem * QgsComposerItem::hAlignSnapItem ( )
protected

Return horizontal align snap item.

Creates a new graphics line if 0

bool QgsComposerItem::hasBackground ( ) const
inline

Whether this item has a Background or not.

Returns
true if there is a Background around this item, otherwise false.
Note
introduced since 2.0
See also
setBackgroundEnabled
backgroundColor
bool QgsComposerItem::hasFrame ( ) const
inline

Whether this item has a frame or not.

Returns
true if there is a frame around this item, otherwise false.
Note
introduced since 1.8
See also
setFrameEnabled
frameOutlineWidth
frameJoinStyle
frameOutlineColor
double QgsComposerItem::horizontalViewScaleFactor ( ) const
protected

Returns the zoom factor of the graphics view.

Returns
the factor or -1 in case of error (e.g. graphic view does not exist)
Note
: this function was introduced in version 1.2
QString QgsComposerItem::id ( ) const
inline

Get item's id (which is not necessarly unique)

Returns
item id
Note
this method was added in version 1.7
See also
setId
bool QgsComposerItem::imageSizeConsideringRotation ( double &  width,
double &  height,
double  rotation 
) const
protected

Calculates width and hight of the picture (in mm) such that it fits into the item frame with the given rotation.

Deprecated:
will be removed in QGIS 3.0
bool QgsComposerItem::imageSizeConsideringRotation ( double &  width,
double &  height 
) const
protected

Calculates width and hight of the picture (in mm) such that it fits into the item frame with the given rotation.

Deprecated:
will be removed in QGIS 3.0
bool QgsComposerItem::isGroupMember ( ) const
inline

Returns whether this item is part of a group.

Returns
true if item is in a group
Note
added in version 2.5
See also
setIsGroupMember
virtual bool QgsComposerItem::isRemoved ( ) const
inlinevirtual

Returns whether this item has been removed from the composition.

Items removed from the composition are not deleted so that they can be restored via an undo command.

Returns
true if the item has been removed from the composition
Note
added in QGIS 2.5
See also
setIsRemoved
double QgsComposerItem::itemRotation ( const QgsComposerObject::PropertyValueType  valueType = QgsComposerObject::EvaluatedValue) const

Returns the current rotation for the composer item.

Returns
rotation for composer item
Parameters
valueTypecontrols whether the returned value is the user specified rotation, or the current evaluated rotation (which may be affected by data driven rotation settings).
Note
this method was added in version 2.1
See also
setItemRotation
void QgsComposerItem::itemRotationChanged ( double  newRotation)
signal

Is emitted on item rotation change.

QRectF QgsComposerItem::largestRotatedRectWithinBounds ( QRectF  originalRect,
QRectF  boundsRect,
double  rotation 
) const
protected

Calculates the largest scaled version of originalRect which fits within boundsRect, when it is rotated by a specified amount.

Parameters
originalRectQRectF to be rotated and scaled
boundsRectQRectF specifying the bounds which the rotated and scaled rectangle must fit within
rotationthe rotation in degrees to be applied to the rectangle
Deprecated:
use QgsComposerUtils::largestRotatedRectWithinBounds instead
ItemPositionMode QgsComposerItem::lastUsedPositionMode ( )
inline

Returns item's last used position mode.

Note
: This property has no effect on actual's item position, which is always the top-left corner.
: this method was added in version 2.0
void QgsComposerItem::lockChanged ( )
signal

Emitted if the item's lock status changes.

Note
: this function was introduced in version 2.5
double QgsComposerItem::lockSymbolSize ( ) const
protected

Returns the size of the lock symbol depending on the composer zoom level and the item size.

Note
: this function was introduced in version 1.2
Deprecated:
will be removed in QGIS 3.0
void QgsComposerItem::move ( double  dx,
double  dy 
)

Moves item in canvas coordinates.

virtual void QgsComposerItem::moveContent ( double  dx,
double  dy 
)
inlinevirtual

Move Content of item.

Does nothing per default (but implemented in composer map)

Parameters
dxmove in x-direction (canvas coordinates)
dymove in y-direction(canvas coordinates)

Reimplemented in QgsComposerMap.

virtual int QgsComposerItem::numberExportLayers ( ) const
inlinevirtual

Get the number of layers that this item requires for exporting as layers.

Returns
0 if this item is to be placed on the same layer as the previous item, 1 if it should be placed on its own layer, and >1 if it requires multiple export layers
Note
this method was added in version 2.4
See also
setCurrentExportLayer

Reimplemented in QgsComposerMap.

int QgsComposerItem::page ( ) const

Gets the page the item is currently on.

Returns
page number for item, beginning on page 1
See also
pagePos
updatePagePos
Note
this method was added in version 2.4
QPointF QgsComposerItem::pagePos ( ) const

Returns the item's position relative to its current page.

Returns
position relative to the page's top left corner.
See also
page
updatePagePos
Note
this method was added in version 2.4
double QgsComposerItem::pixelFontSize ( double  pointSize) const

Calculates font size in mm from a font point size.

Deprecated:
use QgsComposerUtils::mmFontSize instead
bool QgsComposerItem::positionLock ( ) const
inline

Returns whether position lock for mouse drags is enabled returns true if item is locked for mouse movement and resizing.

Note
this method was added in version 1.2
See also
setPositionLock
double QgsComposerItem::rectHandlerBorderTolerance ( ) const
protected

Returns the current (zoom level dependent) tolerance to decide if mouse position is close enough to the item border for resizing.

QRectF QgsComposerItem::rectWithFrame ( ) const
virtual

Returns the item's rectangular bounds, including any bleed caused by the item's frame.

The bounds are returned in the item's coordinate system (see Qt's QGraphicsItem docs for more details about QGraphicsItem coordinate systems). The results differ from Qt's rect() function, as rect() makes no allowances for the portion of outlines which are drawn outside of the item.

Note
introduced in 2.2
See also
estimatedFrameBleed
void QgsComposerItem::refreshDataDefinedProperty ( const QgsComposerObject::DataDefinedProperty  property = QgsComposerObject::AllProperties)
virtualslot

Refreshes a data defined property for the item by reevaluating the property's value and redrawing the item with this new value.

Parameters
propertydata defined property to refresh. If property is set to QgsComposerItem::AllProperties then all data defined properties for the item will be refreshed.
Note
this method was added in version 2.5

Reimplemented in QgsComposerMap, and QgsComposerPicture.

virtual void QgsComposerItem::removeItems ( )
inlinevirtual

Reimplemented in QgsComposerItemGroup.

void QgsComposerItem::repaint ( )
slot
void QgsComposerItem::rotate ( double  angle,
double &  x,
double &  y 
) const
protected

Rotates a point / vector.

Parameters
anglerotation angle in degrees, counterclockwise
xin/out: x coordinate before / after the rotation
yin/out: y cooreinate before / after the rotation
Deprecated:
use QgsComposerUtils:rotate instead
Q_DECL_DEPRECATED double QgsComposerItem::rotation ( ) const
inline

Returns the rotation for the composer item.

Deprecated:
Use itemRotation() instead
QFont QgsComposerItem::scaledFontPixelSize ( const QFont &  font) const

Returns a font where size is in pixel and font size is upscaled with FONT_WORKAROUND_SCALE.

Deprecated:
use QgsComposerUtils::scaledFontPixelSize instead
virtual bool QgsComposerItem::selected ( ) const
inlinevirtual

Is selected.

void QgsComposerItem::setBackgroundColor ( const QColor &  backgroundColor)

Sets the background color for this item.

Parameters
backgroundColornew background color
Returns
nothing
Note
introduced in 2.0
See also
backgroundColor
setBackgroundEnabled
void QgsComposerItem::setBackgroundEnabled ( const bool  drawBackground)
inline

Set whether this item has a Background drawn around it or not.

Parameters
drawBackgrounddraw Background
Returns
nothing
Note
introduced in 2.0
See also
hasBackground
setBackgroundColor
void QgsComposerItem::setBlendMode ( const QPainter::CompositionMode  blendMode)

Sets the item's composition blending mode.

Parameters
blendModeblending mode for item
See also
blendMode
virtual void QgsComposerItem::setCurrentExportLayer ( const int  layerIdx = -1)
inlinevirtual

Sets the current layer to draw for exporting.

Parameters
layerIdxcan be set to -1 to draw all item layers, and must be less than numberExportLayers()
Note
this method was added in version 2.4
See also
numberExportLayers
void QgsComposerItem::setEffectsEnabled ( const bool  effectsEnabled)

Sets whether effects (eg blend modes) are enabled for the item.

Parameters
effectsEnabledset to true to enable effects
Note
introduced in 2.0
See also
effectsEnabled
setTransparency
setBlendMode
void QgsComposerItem::setExcludeFromExports ( const bool  exclude)
virtual

Sets whether the item should be excluded from composer exports and prints.

Parameters
excludeset to true to exclude the item from exports
Note
added in version 2.5
See also
excludeFromExports
void QgsComposerItem::setFrameEnabled ( const bool  drawFrame)

Set whether this item has a frame drawn around it or not.

Parameters
drawFramedraw frame
Note
introduced in 1.8
See also
hasFrame
setFrameOutlineWidth
setFrameJoinStyle
setFrameOutlineColor
void QgsComposerItem::setFrameJoinStyle ( const Qt::PenJoinStyle  style)

Sets join style used when drawing the item's frame.

Parameters
styleJoin style for outline frame
Note
introduced in 2.3
See also
setFrameEnabled
frameJoinStyle
setFrameOutlineWidth
setFrameOutlineColor
void QgsComposerItem::setFrameOutlineColor ( const QColor &  color)
virtual

Sets frame outline color.

Parameters
colornew color for outline frame
Note
introduced in 2.6
See also
frameOutlineColor
setFrameEnabled
setFrameJoinStyle
setFrameOutlineWidth
void QgsComposerItem::setFrameOutlineWidth ( const double  outlineWidth)
virtual

Sets frame outline width.

Parameters
outlineWidthnew width for outline frame
Note
introduced in 2.2
See also
frameOutlineWidth
setFrameEnabled
setFrameJoinStyle
setFrameOutlineColor

Reimplemented in QgsComposerMap.

void QgsComposerItem::setId ( const QString &  id)
virtual

Set item's id (which is not necessarly unique)

Parameters
idnew id for item
Note
this method was added in version 1.7
See also
id
void QgsComposerItem::setIsGroupMember ( const bool  isGroupMember)

Sets whether this item is part of a group.

Parameters
isGroupMemberset to true if item is in a group
Note
added in version 2.5
See also
isGroupMember
void QgsComposerItem::setIsRemoved ( const bool  removed)
inline

Sets whether this item has been removed from the composition.

Items removed from the composition are not deleted so that they can be restored via an undo command.

Parameters
removedset to true if the item has been removed from the composition
Note
added in QGIS 2.5
See also
isRemoved
void QgsComposerItem::setItemPosition ( double  x,
double  y,
ItemPositionMode  itemPoint = UpperLeft,
int  page = -1 
)

Moves the item to a new position (in canvas coordinates)

void QgsComposerItem::setItemPosition ( double  x,
double  y,
double  width,
double  height,
ItemPositionMode  itemPoint = UpperLeft,
bool  posIncludesFrame = false,
int  page = -1 
)

Sets item position and width / height in one go.

Parameters
xitem position x
yitem position y
widthitem width
heightitem height
itemPointitem position mode
posIncludesFrameset to true if the position and size arguments include the item's frame border
pageif page > 0, y is interpreted as relative to the origin of the specified page, if page <= 0, y is in absolute canvas coordinates
Note
: this method was added in version 1.6
void QgsComposerItem::setItemRotation ( const double  r,
const bool  adjustPosition = false 
)
virtualslot

Sets the item rotation.

Parameters
ritem rotation in degrees
adjustPositionset to true if item should be shifted so that rotation occurs around item center. If false, rotation occurs around item origin
Note
this method was added in version 2.1
See also
itemRotation
void QgsComposerItem::setPositionLock ( const bool  lock)

Locks / unlocks the item position for mouse drags.

Parameters
lockset to true to prevent item movement and resizing via the mouse
Note
this method was added in version 1.2
See also
positionLock
void QgsComposerItem::setRotation ( double  r)
virtualslot

Sets the item rotation.

Deprecated:
Use setItemRotation( double rotation ) instead

Reimplemented in QgsComposerMap.

void QgsComposerItem::setSceneRect ( const QRectF &  rectangle)
virtual

Sets this items bound in scene coordinates such that 1 item size units corresponds to 1 scene size unit.

Reimplemented in QgsComposerAttributeTable, QgsComposerMap, QgsComposerPicture, QgsComposerShape, QgsPaperItem, QgsComposerArrow, QgsComposerFrame, and QgsComposerItemGroup.

void QgsComposerItem::setSelected ( bool  s)
virtual

Set selected, selected item should be highlighted.

void QgsComposerItem::setTransparency ( const int  transparency)

Sets the item's transparency.

Parameters
transparencyinteger between 0 (transparent) and 255 (opaque)
See also
transparency
void QgsComposerItem::setVisibility ( const bool  visible)
virtual

Sets visibility for item.

Parameters
visibleset to true to show item, false to hide item
Note
QGraphicsItem::setVisible should not be called directly on a QgsComposerItem, as some item types (eg groups) need to override the visibility toggle.
added in version 2.5

Reimplemented in QgsComposerItemGroup.

bool QgsComposerItem::shouldDrawItem ( ) const
protected

Returns whether the item should be drawn in the current context.

Returns
true if item should be drawn
Note
added in QGIS 2.5
void QgsComposerItem::sizeChanged ( )
signal

Emitted if the rectangle changes.

void QgsComposerItem::sizeChangedByRotation ( double &  width,
double &  height,
double  rotation 
)
protected

Calculates width / height of the bounding box of a rotated rectangle.

Deprecated:
will be removed in QGIS 3.0
void QgsComposerItem::sizeChangedByRotation ( double &  width,
double &  height 
)
protected

Calculates width / height of the bounding box of a rotated rectangle.

Deprecated:
will be removed in QGIS 3.0
double QgsComposerItem::textWidthMillimeters ( const QFont &  font,
const QString &  text 
) const

Returns the font width in millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.

Deprecated:
use QgsComposerUtils::textWidthMM instead
int QgsComposerItem::transparency ( ) const
inline

Returns the item's transparency.

Returns
transparency as integer between 0 (transparent) and 255 (opaque)
See also
setTransparency
virtual int QgsComposerItem::type ( ) const
inlinevirtual
virtual void QgsComposerItem::updateItem ( )
inlinevirtual

Updates item, with the possibility to do custom update for subclasses.

Reimplemented in QgsComposerMap.

void QgsComposerItem::updatePagePos ( double  newPageWidth,
double  newPageHeight 
)

Moves the item so that it retains its relative position on the page when the paper size changes.

Parameters
newPageWidthnew width of the page in mm
newPageHeightnew height of the page in mm
See also
page
pagePos
Note
this method was added in version 2.4
QString QgsComposerItem::uuid ( ) const
inline

Get item identification name.

Returns
unique item identification string
Note
this method was added in version 2.0
there is not setter since one can't manually set the id
See also
id
setId
QGraphicsLineItem * QgsComposerItem::vAlignSnapItem ( )
protected

Return vertical align snap item.

Creates a new graphics line if 0

virtual Q_DECL_DEPRECATED void QgsComposerItem::zoomContent ( int  delta,
double  x,
double  y 
)
inlinevirtual

Zoom content of item.

Does nothing per default (but implemented in composer map)

Parameters
deltavalue from wheel event that describes direction (positive /negative number)
xx-position of mouse cursor (in item coordinates)
yy-position of mouse cursor (in item coordinates)
Deprecated:
use zoomContent( double, QPointF, ZoomMode ) instead

Reimplemented in QgsComposerMap.

virtual void QgsComposerItem::zoomContent ( const double  factor,
const QPointF  point,
const ZoomMode  mode = QgsComposerItem::Zoom 
)
inlinevirtual

Zoom content of item.

Does nothing per default (but implemented in composer map)

Parameters
factorzoom factor, where > 1 results in a zoom in and < 1 results in a zoom out
pointitem point for zoom center
modezoom mode
Note
added in QGIS 2.5

Reimplemented in QgsComposerMap.

Friends And Related Function Documentation

friend class QgsComposerItemGroup
friend

Member Data Documentation

bool QgsComposerItem::mBackground
protected

True if item background needs to be painted.

QColor QgsComposerItem::mBackgroundColor
protected

Background color.

QPainter::CompositionMode QgsComposerItem::mBlendMode
protected

Composition blend mode for item.

QGraphicsRectItem* QgsComposerItem::mBoundingResizeRectangle
protected

Rectangle used during move and resize actions.

int QgsComposerItem::mCurrentExportLayer
protected

The layer that needs to be exported.

Note
: if -1, all layers are to be exported
: this member was added in version 2.4
QgsComposerItem::MouseMoveAction QgsComposerItem::mCurrentMouseMoveAction
protected
QgsComposerEffect* QgsComposerItem::mEffect
protected
bool QgsComposerItem::mEffectsEnabled
protected
bool QgsComposerItem::mEvaluatedExcludeFromExports
protected

Temporary evaluated item exclusion.

Data defined properties may mean this value differs from mExcludeFromExports.

double QgsComposerItem::mEvaluatedItemRotation
protected

Temporary evaluated item rotation in degrees, clockwise.

Data defined rotation may mean this value differs from mItemRotation.

bool QgsComposerItem::mExcludeFromExports
protected

Whether item should be excluded in exports.

bool QgsComposerItem::mFrame
protected

True if item fram needs to be painted.

Qt::PenJoinStyle QgsComposerItem::mFrameJoinStyle
protected

Frame join style.

QGraphicsLineItem* QgsComposerItem::mHAlignSnapItem
protected
bool QgsComposerItem::mIsGroupMember
protected

Whether or not this item is part of a group.

bool QgsComposerItem::mItemPositionLocked
protected

True if item position and size cannot be changed with mouse move.

Note
: this member was added in version 1.2
double QgsComposerItem::mItemRotation
protected

Item rotation in degrees, clockwise.

QPointF QgsComposerItem::mLastMouseEventPos
protected

Position of the last mouse move event (in scene coordinates)

ItemPositionMode QgsComposerItem::mLastUsedPositionMode
protected

The item's position mode.

Note
: this member was added in version 2.0
double QgsComposerItem::mLastValidViewScaleFactor
mutableprotected

Backup to restore item appearance if no view scale factor is available.

QPointF QgsComposerItem::mMouseMoveStartPos
protected

Start point of the last mouse move action (in scene coordinates)

bool QgsComposerItem::mRemovedFromComposition
protected

True if item has been removed from the composition.

int QgsComposerItem::mTransparency
protected

Item transparency.

QGraphicsLineItem* QgsComposerItem::mVAlignSnapItem
protected

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