ModelPartList Class Reference

#include "ModelPartList.h"

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Public Member Functions
	ModelPartList (const QString &data, QObject *parent=NULL)
	~ModelPartList ()
int	columnCount (const QModelIndex &parent) const
QVariant	data (const QModelIndex &index, int role) const
Qt::ItemFlags	flags (const QModelIndex &index) const
QVariant	headerData (int section, Qt::Orientation orientation, int role) const
QModelIndex	index (int row, int column, const QModelIndex &parent) const
QModelIndex	parent (const QModelIndex &index) const
int	rowCount (const QModelIndex &parent) const
ModelPart *	getRootItem ()
QModelIndex	appendChild (QModelIndex &parent, const QList< QVariant > &data)

Private Attributes
ModelPart *	rootItem

Constructor & Destructor Documentation

ModelPartList()

ModelPartList::ModelPartList	(	const QString &	data,
		QObject *	parent = NULL
	)

< A special Qt tag used to indicate that this is a special Qt class that might require preprocessing before compiling. Constructor Arguments are standard arguments for this type of class but are not used in this example.

Parameters

data	is not used
parent	is used by the parent class constructor

~ModelPartList()

ModelPartList::~ModelPartList

(

)

Destructor Frees root item allocated in constructor

Member Function Documentation

appendChild()

QModelIndex ModelPartList::appendChild	(	QModelIndex &	parent,
		const QList< QVariant > &	data
	)

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columnCount()

int ModelPartList::columnCount

(

const QModelIndex &

parent

)

const

Return column count

Parameters

parent

is not used

Returns

number of columns in the tree view - "Part" and "Visible", i.e. 2 in this case

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data()

QVariant ModelPartList::data	(	const QModelIndex &	index,
		int	role
	)		const

This returns the value of a particular row (i.e. the item index) and columns (i.e. either the "Part" or "Visible" property). It is used by QT internally - this is how Qt retrieves the text to display in the TreeView

Parameters

index	in a stucture Qt uses to specify the row and column it wants data for
role	is how Qt specifies what it wants to do with the data

Returns

a QVariant which is a generic variable used to represent any Qt class type, in this case the QVariant will be a string

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flags()

Qt::ItemFlags ModelPartList::flags

(

const QModelIndex &

index

)

const

Standard function used by Qt internally.

Parameters

index

in a stucture Qt uses to specify the row and column it wants data for

Returns

a Qt item flags

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getRootItem()

ModelPart * ModelPartList::getRootItem

(

)

Get a pointer to the root item of the tree

Returns

the root item pointer

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headerData()

QVariant ModelPartList::headerData	(	int	section,
		Qt::Orientation	orientation,
		int	role
	)		const

Standard function used by Qt internally.

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index()

QModelIndex ModelPartList::index	(	int	row,
		int	column,
		const QModelIndex &	parent
	)		const

Get a valid QModelIndex for a location in the tree (row is the row in the tree under "parent" or under the root of the tree if parent isnt specified. Column is either 0 = "Part" or 1 = "Visible" in this example

Parameters

row	is the item index
column	is 0 or 1 - part name or visible stringstream
parent	where the row is referenced from, usually the tree root

Returns

the QModelIndex structure

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parent()

QModelIndex ModelPartList::parent

(

const QModelIndex &

index

)

const

Take a QModelIndex for an item, get a QModel Index for its parent

Parameters

index

of item

Returns

index of parent

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rowCount()

int ModelPartList::rowCount

(

const QModelIndex &

parent

)

const

Get number of rows (items) under an item in tree

Parameters

is	the parent, all items under this will be counted

Returns

number of children

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Member Data Documentation

rootItem

ModelPart* ModelPartList::rootItem

private

This is a pointer to the item at the base of the tree

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

• Model/ModelPartList.h
• Model/ModelPartList.cpp