Lancelot::NodeLayout Class Reference

#include <NodeLayout.h>

Inheritance diagram for Lancelot::NodeLayout:

Classes
class	NodeCoordinate

Public Member Functions
	NodeLayout (QGraphicsLayoutItem *parent=0)
virtual	~NodeLayout ()
void	addItem (QGraphicsLayoutItem *item)
void	addItem (QGraphicsLayoutItem *item, NodeCoordinate topLeft, NodeCoordinate bottomRight)
void	addItem (QGraphicsLayoutItem *item, NodeCoordinate node, qreal xr=0, qreal yr=0)
L_Override int	count () const
L_Override QGraphicsLayoutItem *	itemAt (int i) const
L_Override void	removeAt (int index)
L_Override void	setGeometry (const QRectF &rect)
L_Override QSizeF	sizeHint (Qt::SizeHint which, const QSizeF &constraint=QSizeF()) const
Public Member Functions inherited from QGraphicsLayout
	QGraphicsLayout (QGraphicsLayoutItem *parent)
	~QGraphicsLayout ()
void	activate ()
virtual int	count () const =0
virtual void	getContentsMargins (qreal *left, qreal *top, qreal *right, qreal *bottom) const
virtual void	invalidate ()
bool	isActivated () const
virtual QGraphicsLayoutItem *	itemAt (int i) const =0
virtual void	removeAt (int index)=0
void	setContentsMargins (qreal left, qreal top, qreal right, qreal bottom)
virtual void	updateGeometry ()
virtual void	widgetEvent (QEvent *e)
Public Member Functions inherited from QGraphicsLayoutItem
	QGraphicsLayoutItem (QGraphicsLayoutItem *parent, bool isLayout)
virtual	~QGraphicsLayoutItem ()
QRectF	contentsRect () const
QSizeF	effectiveSizeHint (Qt::SizeHint which, const QSizeF &constraint) const
QRectF	geometry () const
QGraphicsItem *	graphicsItem () const
bool	isLayout () const
qreal	maximumHeight () const
QSizeF	maximumSize () const
qreal	maximumWidth () const
qreal	minimumHeight () const
QSizeF	minimumSize () const
qreal	minimumWidth () const
bool	ownedByLayout () const
QGraphicsLayoutItem *	parentLayoutItem () const
qreal	preferredHeight () const
QSizeF	preferredSize () const
qreal	preferredWidth () const
void	setMaximumHeight (qreal height)
void	setMaximumSize (const QSizeF &size)
void	setMaximumSize (qreal w, qreal h)
void	setMaximumWidth (qreal width)
void	setMinimumHeight (qreal height)
void	setMinimumSize (const QSizeF &size)
void	setMinimumSize (qreal w, qreal h)
void	setMinimumWidth (qreal width)
void	setParentLayoutItem (QGraphicsLayoutItem *parent)
void	setPreferredHeight (qreal height)
void	setPreferredSize (const QSizeF &size)
void	setPreferredSize (qreal w, qreal h)
void	setPreferredWidth (qreal width)
void	setSizePolicy (const QSizePolicy &policy)
void	setSizePolicy (QSizePolicy::Policy hPolicy, QSizePolicy::Policy vPolicy, QSizePolicy::ControlType controlType)
QSizePolicy	sizePolicy () const

Additional Inherited Members
Static Public Member Functions inherited from QGraphicsLayout
bool	instantInvalidatePropagation ()
void	setInstantInvalidatePropagation (bool enable)
Protected Member Functions inherited from QGraphicsLayout
void	addChildLayoutItem (QGraphicsLayoutItem *layoutItem)
Protected Member Functions inherited from QGraphicsLayoutItem
void	setGraphicsItem (QGraphicsItem *item)
void	setOwnedByLayout (bool ownership)
virtual QSizeF	sizeHint (Qt::SizeHint which, const QSizeF &constraint) const =0

Detailed Description

Node layout has an advanced layouting mechanism.

Every item's position is defined by two nodes - one for top-left corner, and the other one for bottom-right corner.

Each node is defined by a pair of relative (xr, yr) and a pair of absolute (xa, ya) coordinates. The calculated node coordinates depend on the size and position of the NodeLayout object in the following manner: x = layoutLeft + (xr * layoutWidth) + xa y = layoutTop + (yr * layoutHeight) + ya

Alternatively, the item's position can be defined by using one node and one pair of relative coordinates (xr, yr). In that case, the item is sized following the sizeHint(). The relative coordinates (this time they are relative to the item's geometry, not the layout's) specify what point of the item will be bound to the defined node.

Definition at line 51 of file NodeLayout.h.

Constructor & Destructor Documentation

Lancelot::NodeLayout::NodeLayout ( QGraphicsLayoutItem *  parent = 0 )

explicit

Creates a new Lancelot::NodeLayout.

Parameters

parent

parent layout item

Definition at line 179 of file NodeLayout.cpp.

Lancelot::NodeLayout::~NodeLayout ( )

virtual

Destroys this Lancelot::NodeLayout.

Definition at line 184 of file NodeLayout.cpp.

Member Function Documentation

void Lancelot::NodeLayout::addItem

(

QGraphicsLayoutItem *

item

)

Adds item at top-left corner, with automatic sizing (using sizeHint of the item)

Definition at line 209 of file NodeLayout.cpp.

void Lancelot::NodeLayout::addItem	(	QGraphicsLayoutItem *	item,
		NodeCoordinate	topLeft,
		NodeCoordinate	bottomRight
	)

Adds item with specified top-left and bottom right corners.

Definition at line 214 of file NodeLayout.cpp.

void Lancelot::NodeLayout::addItem	(	QGraphicsLayoutItem *	item,
		NodeCoordinate	node,
		qreal	xr = 0,
		qreal	yr = 0
	)

Adds item with automatic sizing turned on.

xr and yr specify which point of the item is bound to node coordinate. Those are relative coordinates so (0, 0) represent top left corner, (0.5, 0.5) represent the center of the item etc.

Definition at line 225 of file NodeLayout.cpp.

int Lancelot::NodeLayout::count

(

)

const

Definition at line 237 of file NodeLayout.cpp.

QGraphicsLayoutItem * Lancelot::NodeLayout::itemAt

(

int

i

)

const

Definition at line 242 of file NodeLayout.cpp.

void Lancelot::NodeLayout::removeAt

(

int

index

)

Definition at line 251 of file NodeLayout.cpp.

void Lancelot::NodeLayout::setGeometry ( const QRectF &  rect )

virtual

Reimplemented from QGraphicsLayoutItem.

Definition at line 260 of file NodeLayout.cpp.

QSizeF Lancelot::NodeLayout::sizeHint	(	Qt::SizeHint	which,
		const QSizeF &	constraint = QSizeF()
	)		const

Definition at line 189 of file NodeLayout.cpp.

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

• NodeLayout.h
• NodeLayout.cpp