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QgsComposerArrow Class Reference

An item that draws an arrow between to points. More...

#include <qgscomposerarrow.h>

Inheritance diagram for QgsComposerArrow:
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Collaboration diagram for QgsComposerArrow:
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Public Types

enum  MarkerMode { DefaultMarker, NoMarker, SVGMarker }
- Public Types inherited from QgsComposerItem
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
}

Public Member Functions

 QgsComposerArrow (QgsComposition *c)
 QgsComposerArrow (const QPointF &startPoint, const QPointF &stopPoint, QgsComposition *c)
 ~QgsComposerArrow ()
virtual int type () const
 return correct graphics item type.
void paint (QPainter *painter, const QStyleOptionGraphicsItem *itemStyle, QWidget *pWidget)
 Reimplementation of QCanvasItem::paint - draw on canvas.
void setSceneRect (const QRectF &rectangle)
 Modifies position of start and endpoint and calls QgsComposerItem::setSceneRect.
void setArrowHeadWidth (double width)
 Sets the width of the arrow head in mm.
double arrowHeadWidth () const
void setOutlineWidth (double width)
double outlineWidth () const
void setStartMarker (const QString &svgPath)
QString startMarker () const
void setEndMarker (const QString &svgPath)
QString endMarker () const
QColor arrowColor () const
void setArrowColor (const QColor &c)
MarkerMode markerMode () const
void setMarkerMode (MarkerMode mode)
bool writeXML (QDomElement &elem, QDomDocument &doc) const
 stores state in Dom element
bool readXML (const QDomElement &itemElem, const QDomDocument &doc)
 sets state from Dom document
- Public Member Functions inherited from QgsComposerItem
 QgsComposerItem (QgsComposition *composition, bool manageZValue=true)
 Constructor.
 QgsComposerItem (qreal x, qreal y, qreal width, qreal height, QgsComposition *composition, bool manageZValue=true)
 Constructor with box position and composer object.
virtual ~QgsComposerItem ()
virtual void setSelected (bool s)
 Set selected, selected item should be highlighted.
virtual bool selected ()
 Is selected.
virtual bool writeSettings ()
 stores state in project
virtual bool readSettings ()
 read state from project
virtual bool removeSettings ()
 delete settings from project file
void move (double dx, double dy)
 Moves item in canvas coordinates.
virtual void moveContent (double dx, double dy)
 Move Content of item.
virtual void zoomContent (int delta, double x, double y)
 Zoom content of item.
void setItemPosition (double x, double y, ItemPositionMode itemPoint=UpperLeft)
 Moves the item to a new position (in canvas coordinates)
void setItemPosition (double x, double y, double width, double height, ItemPositionMode itemPoint=UpperLeft)
 Sets item position and width / height in one go.
ItemPositionMode lastUsedPositionMode ()
 Returns item's last used position mode.
bool _writeXML (QDomElement &itemElem, QDomDocument &doc) const
 Writes parameter that are not subclass specific in document.
bool _readXML (const QDomElement &itemElem, const QDomDocument &doc)
 Reads parameter that are not subclass specific in document.
bool hasFrame () const
 Whether this item has a frame or not.
void setFrameEnabled (bool drawFrame)
 Set whether this item has a frame drawn around it or not.
bool hasBackground () const
 Whether this item has a Background or not.
void setBackgroundEnabled (bool drawBackground)
 Set whether this item has a Background drawn around it or not.
QColor backgroundColor () const
 Gets the background color for this item.
void setBackgroundColor (const QColor &backgroundColor)
 Sets the background color for this item.
QPainter::CompositionMode blendMode () const
 Returns the item's composition blending mode.
void setBlendMode (QPainter::CompositionMode blendMode)
 Sets the item's composition blending mode.
int transparency () const
 Returns the item's transparency.
void setTransparency (int transparency)
 Sets the item's transparency.
bool effectsEnabled () const
 Returns true if effects (eg blend modes) are enabled for the item.
void setEffectsEnabled (bool effectsEnabled)
 Sets whether effects (eg blend modes) are enabled for the item.
virtual void addItem (QgsComposerItem *item)
 Composite operations for item groups do nothing per default.
virtual void removeItems ()
const QgsCompositioncomposition () const
QgsCompositioncomposition ()
virtual void beginItemCommand (const QString &text)
void beginCommand (const QString &commandText, QgsComposerMergeCommand::Context c=QgsComposerMergeCommand::Unknown)
 Starts new composer undo command.
virtual void endItemCommand ()
void endCommand ()
 Finish current command and push it onto the undo stack.
void cancelCommand ()
void drawText (QPainter *p, double x, double y, const QString &text, const QFont &font) const
 Draws Text.
void drawText (QPainter *p, const QRectF &rect, const QString &text, const QFont &font, Qt::AlignmentFlag halignment=Qt::AlignLeft, Qt::AlignmentFlag valignment=Qt::AlignTop) const
 Like the above, but with a rectangle for multiline text.
double textWidthMillimeters (const QFont &font, const QString &text) const
 Returns the font width in millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.
double fontHeightCharacterMM (const QFont &font, const QChar &c) const
 Returns the font height of a character in millimeters.
double fontAscentMillimeters (const QFont &font) const
 Returns the font ascent in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.
double fontDescentMillimeters (const QFont &font) const
 Returns the font ascent in Millimeters (considers upscaling and downscaling with FONT_WORKAROUND_SCALE.
double pixelFontSize (double pointSize) const
 Calculates font to from point size to pixel size.
QFont scaledFontPixelSize (const QFont &font) const
 Returns a font where size is in pixel and font size is upscaled with FONT_WORKAROUND_SCALE.
void setPositionLock (bool lock)
 Locks / unlocks the item position for mouse drags.
bool positionLock () const
 Returns position lock for mouse drags (true means locked)
void updateCursor (const QPointF &itemPos)
 Update mouse cursor at (item) position.
double rotation () const
virtual void updateItem ()
 Updates item, with the possibility to do custom update for subclasses.
QString id () const
 Get item's id (which is not necessarly unique)
virtual void setId (const QString &id)
 Set item's id (which is not necessarly unique)
QString uuid () const
 Get item identification name.

Private Types

enum  MarkerType { StartMarker, EndMarker }

Private Member Functions

void adaptItemSceneRect ()
 Adapts the item scene rect to contain the start point, the stop point including the arrow marker and the outline.
void drawHardcodedMarker (QPainter *p, MarkerType type)
 Draws the default marker at the line end.
void drawSVGMarker (QPainter *p, MarkerType type, const QString &markerPath)
 Draws a user-defined marker (must be an svg file)
void initGraphicsSettings ()
 Apply default graphics settings.

Private Attributes

QPointF mStartPoint
QPointF mStopPoint
QPen mPen
QBrush mBrush
double mArrowHeadWidth
 Width of the arrow marker in mm.
double mStartArrowHeadHeight
 Height of the arrow marker in mm.
double mStopArrowHeadHeight
QString mStartMarkerFile
 Path to the start marker file.
QString mEndMarkerFile
 Path to the end marker file.
MarkerMode mMarkerMode
 Default marker, no marker or svg marker.
QColor mArrowColor

Additional Inherited Members

- Public Slots inherited from QgsComposerItem
virtual void setRotation (double r)
void repaint ()
- Signals inherited from QgsComposerItem
void rotationChanged (double newRotation)
 Is emitted on rotation change to notify north arrow pictures.
void itemChanged ()
 Used e.g.
void sizeChanged ()
 Emitted if the rectangle changes.
- Protected Member Functions inherited from QgsComposerItem
virtual void mouseMoveEvent (QGraphicsSceneMouseEvent *event)
virtual void mousePressEvent (QGraphicsSceneMouseEvent *event)
virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *event)
virtual void hoverMoveEvent (QGraphicsSceneHoverEvent *event)
Qt::CursorShape cursorForPosition (const QPointF &itemCoordPos)
 Finds out the appropriate cursor for the current mouse position in the widget (e.g.
QgsComposerItem::MouseMoveAction mouseMoveActionForPosition (const QPointF &itemCoordPos)
 Finds out which mouse move action to choose depending on the cursor position inside the widget.
void changeItemRectangle (const QPointF &currentPosition, const QPointF &mouseMoveStartPos, const QGraphicsRectItem *originalItem, double dx, double dy, QGraphicsRectItem *changeItem)
 Changes the rectangle of an item depending on current mouse action (resize or move)
virtual void drawSelectionBoxes (QPainter *p)
 Draw selection boxes around item.
virtual void drawFrame (QPainter *p)
 Draw black frame around item.
virtual void drawBackground (QPainter *p)
 Draw background.
void drawArrowHead (QPainter *p, double x, double y, double angle, double arrowHeadWidth) const
 Draws arrowhead.
double angle (const QPointF &p1, const QPointF &p2) const
 Returns angle of the line from p1 to p2 (clockwise, starting at N)
double rectHandlerBorderTolerance () const
 Returns the current (zoom level dependent) tolerance to decide if mouse position is close enough to the item border for resizing.
double lockSymbolSize () const
 Returns the size of the lock symbol depending on the composer zoom level and the item size.
double horizontalViewScaleFactor () const
 Returns the zoom factor of the graphics view.
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.
bool cornerPointOnRotatedAndScaledRect (double &x, double &y, double width, double height) const
 Calculates corner point after rotation and scaling.
void sizeChangedByRotation (double &width, double &height)
 Calculates width / height of the bounding box of a rotated rectangle (mRotation)
void rotate (double angle, double &x, double &y) const
 Rotates a point / vector.
QGraphicsLineItem * hAlignSnapItem ()
 Return horizontal align snap item.
void deleteHAlignSnapItem ()
QGraphicsLineItem * vAlignSnapItem ()
 Return vertical align snap item.
void deleteVAlignSnapItem ()
void deleteAlignItems ()
- Protected Attributes inherited from QgsComposerItem
QgsCompositionmComposition
QgsComposerItem::MouseMoveAction mCurrentMouseMoveAction
QPointF mMouseMoveStartPos
 Start point of the last mouse move action (in scene coordinates)
QPointF mLastMouseEventPos
 Position of the last mouse move event (in scene coordinates)
QGraphicsRectItem * mBoundingResizeRectangle
 Rectangle used during move and resize actions.
QGraphicsLineItem * mHAlignSnapItem
QGraphicsLineItem * mVAlignSnapItem
bool mFrame
 True if item fram needs to be painted.
bool mBackground
 True if item background needs to be painted.
QColor mBackgroundColor
 Background color.
bool mItemPositionLocked
 True if item position and size cannot be changed with mouse move.
double mLastValidViewScaleFactor
 Backup to restore item appearance if no view scale factor is available.
double mRotation
 Item rotation in degrees, clockwise.
QPainter::CompositionMode mBlendMode
 Composition blend mode for item.
bool mEffectsEnabled
QgsComposerEffectmEffect
int mTransparency
 Item transparency.
ItemPositionMode mLastUsedPositionMode
 The item's position mode.

Detailed Description

An item that draws an arrow between to points.

Definition at line 26 of file qgscomposerarrow.h.

Member Enumeration Documentation

Enumerator:
DefaultMarker 
NoMarker 
SVGMarker 

Definition at line 30 of file qgscomposerarrow.h.

Enumerator:
StartMarker 
EndMarker 

Definition at line 82 of file qgscomposerarrow.h.

Constructor & Destructor Documentation

QgsComposerArrow::QgsComposerArrow ( QgsComposition c)

Definition at line 25 of file qgscomposerarrow.cpp.

References initGraphicsSettings().

QgsComposerArrow::QgsComposerArrow ( const QPointF &  startPoint,
const QPointF &  stopPoint,
QgsComposition c 
)

Definition at line 35 of file qgscomposerarrow.cpp.

References adaptItemSceneRect(), and initGraphicsSettings().

QgsComposerArrow::~QgsComposerArrow ( )

Definition at line 46 of file qgscomposerarrow.cpp.

Member Function Documentation

void QgsComposerArrow::adaptItemSceneRect ( )
private

Adapts the item scene rect to contain the start point, the stop point including the arrow marker and the outline.

Needs to be called whenever the arrow width/height, the outline with or the endpoints are changed

Definition at line 261 of file qgscomposerarrow.cpp.

References DefaultMarker, mArrowHeadWidth, mMarkerMode, mPen, mStartArrowHeadHeight, mStartPoint, mStopArrowHeadHeight, mStopPoint, NoMarker, setSceneRect(), and SVGMarker.

Referenced by QgsComposerArrow(), readXML(), setArrowHeadWidth(), setEndMarker(), setOutlineWidth(), setSceneRect(), and setStartMarker().

QColor QgsComposerArrow::arrowColor ( ) const
inline

Definition at line 62 of file qgscomposerarrow.h.

double QgsComposerArrow::arrowHeadWidth ( ) const
inline

Definition at line 52 of file qgscomposerarrow.h.

void QgsComposerArrow::drawHardcodedMarker ( QPainter *  p,
MarkerType  type 
)
private

Draws the default marker at the line end.

Definition at line 114 of file qgscomposerarrow.cpp.

References QgsComposerItem::angle(), QgsComposerItem::drawArrowHead(), mArrowColor, mArrowHeadWidth, mStartPoint, and mStopPoint.

Referenced by paint().

void QgsComposerArrow::drawSVGMarker ( QPainter *  p,
MarkerType  type,
const QString &  markerPath 
)
private
QString QgsComposerArrow::endMarker ( ) const
inline

Definition at line 60 of file qgscomposerarrow.h.

void QgsComposerArrow::initGraphicsSettings ( )
private

Apply default graphics settings.

Definition at line 51 of file qgscomposerarrow.cpp.

References mPen, and setArrowHeadWidth().

Referenced by QgsComposerArrow().

MarkerMode QgsComposerArrow::markerMode ( ) const
inline

Definition at line 65 of file qgscomposerarrow.h.

double QgsComposerArrow::outlineWidth ( ) const
inline

Definition at line 55 of file qgscomposerarrow.h.

Referenced by writeXML().

void QgsComposerArrow::paint ( QPainter *  painter,
const QStyleOptionGraphicsItem *  itemStyle,
QWidget *  pWidget 
)
bool QgsComposerArrow::readXML ( const QDomElement &  itemElem,
const QDomDocument &  doc 
)
virtual

sets state from Dom document

Parameters
itemElemis Dom node corresponding to item tag
docis the document to read

Implements QgsComposerItem.

Definition at line 318 of file qgscomposerarrow.cpp.

References QgsComposerItem::_readXML(), adaptItemSceneRect(), QgsComposerItem::itemChanged(), mArrowColor, mArrowHeadWidth, mMarkerMode, mPen, mStartPoint, mStopPoint, setEndMarker(), and setStartMarker().

Referenced by QgsComposition::addItemsFromXML().

void QgsComposerArrow::setArrowColor ( const QColor &  c)
inline

Definition at line 63 of file qgscomposerarrow.h.

void QgsComposerArrow::setArrowHeadWidth ( double  width)

Sets the width of the arrow head in mm.

Definition at line 253 of file qgscomposerarrow.cpp.

References adaptItemSceneRect(), mArrowHeadWidth, mEndMarkerFile, mStartMarkerFile, setEndMarker(), and setStartMarker().

Referenced by initGraphicsSettings().

void QgsComposerArrow::setEndMarker ( const QString &  svgPath)
void QgsComposerArrow::setMarkerMode ( MarkerMode  mode)
inline

Definition at line 66 of file qgscomposerarrow.h.

void QgsComposerArrow::setOutlineWidth ( double  width)

Definition at line 247 of file qgscomposerarrow.cpp.

References adaptItemSceneRect(), and mPen.

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

Modifies position of start and endpoint and calls QgsComposerItem::setSceneRect.

Reimplemented from QgsComposerItem.

Definition at line 98 of file qgscomposerarrow.cpp.

References adaptItemSceneRect(), mStartPoint, and mStopPoint.

Referenced by adaptItemSceneRect().

void QgsComposerArrow::setStartMarker ( const QString &  svgPath)
QString QgsComposerArrow::startMarker ( ) const
inline

Definition at line 58 of file qgscomposerarrow.h.

virtual int QgsComposerArrow::type ( ) const
inlinevirtual

return correct graphics item type.

Added in v1.7

Reimplemented from QgsComposerItem.

Definition at line 42 of file qgscomposerarrow.h.

References QgsComposerItem::ComposerArrow.

bool QgsComposerArrow::writeXML ( QDomElement &  elem,
QDomDocument &  doc 
) const
virtual

stores state in Dom element

Parameters
elemis Dom element corresponding to 'Composer' tag
docdocument

Implements QgsComposerItem.

Definition at line 285 of file qgscomposerarrow.cpp.

References QgsComposerItem::_writeXML(), mArrowColor, mArrowHeadWidth, mEndMarkerFile, mMarkerMode, mStartMarkerFile, mStartPoint, mStopPoint, and outlineWidth().

Member Data Documentation

QColor QgsComposerArrow::mArrowColor
private

Definition at line 106 of file qgscomposerarrow.h.

Referenced by drawHardcodedMarker(), paint(), readXML(), and writeXML().

double QgsComposerArrow::mArrowHeadWidth
private

Width of the arrow marker in mm.

May be specified by the user. The height is automatically adapted

Definition at line 95 of file qgscomposerarrow.h.

Referenced by adaptItemSceneRect(), drawHardcodedMarker(), drawSVGMarker(), readXML(), setArrowHeadWidth(), setEndMarker(), setStartMarker(), and writeXML().

QBrush QgsComposerArrow::mBrush
private

Definition at line 92 of file qgscomposerarrow.h.

QString QgsComposerArrow::mEndMarkerFile
private

Path to the end marker file.

Definition at line 103 of file qgscomposerarrow.h.

Referenced by drawSVGMarker(), paint(), setArrowHeadWidth(), setEndMarker(), and writeXML().

MarkerMode QgsComposerArrow::mMarkerMode
private

Default marker, no marker or svg marker.

Definition at line 105 of file qgscomposerarrow.h.

Referenced by adaptItemSceneRect(), paint(), readXML(), and writeXML().

QPen QgsComposerArrow::mPen
private
double QgsComposerArrow::mStartArrowHeadHeight
private

Height of the arrow marker in mm.

Is calculated from arrow marker width and apsect ratio of svg

Definition at line 97 of file qgscomposerarrow.h.

Referenced by adaptItemSceneRect(), drawSVGMarker(), and setStartMarker().

QString QgsComposerArrow::mStartMarkerFile
private

Path to the start marker file.

Definition at line 101 of file qgscomposerarrow.h.

Referenced by drawSVGMarker(), paint(), setArrowHeadWidth(), setStartMarker(), and writeXML().

QPointF QgsComposerArrow::mStartPoint
private
double QgsComposerArrow::mStopArrowHeadHeight
private

Definition at line 98 of file qgscomposerarrow.h.

Referenced by adaptItemSceneRect(), drawSVGMarker(), and setEndMarker().

QPointF QgsComposerArrow::mStopPoint
private

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