DiagramView Class Reference

Detailed Description

A view in which to display a DiagramScene.

A view in which to display a DiagramScene. It supports resizing of the window and loading of data into the diagram.

Definition at line 16 of file DiagramView.h.

#include <DiagramView.h>

Inheritance diagram for DiagramView:

Collaboration diagram for DiagramView:

Public Member Functions
	DiagramView (QWidget *parent=nullptr)
	DiagramView (DiagramList *list, QWidget *parent=nullptr)
	~DiagramView () override
void	addGraph (DiagramList *list)
	Adds a new graph to the scene.
int	getHeight ()
	Returns the height of the bounding rectangle of all objects within the scene.
int	getWidth ()
	Returns the width of the bounding rectangle of all objects within the scene.

Protected Member Functions
void	resizeEvent (QResizeEvent *event) override
	Resizes the scene.

Private Member Functions
void	initialize ()
void	keepItemAspectRatio ()
QSize	minimumSizeHint () const override
QSize	sizeHint () const override
void	update ()

Private Attributes
DiagramScene *	_scene

Constructor & Destructor Documentation

DiagramView() [1/2]

DiagramView::DiagramView ( QWidget * parent = nullptr )

explicit

Creates an empty view.

Definition at line 10 of file DiagramView.cpp.

                                        : QGraphicsView(parent)
{
    _scene = new DiagramScene();
    setScene(_scene);
    initialize();
}

References _scene, and initialize().

DiagramView() [2/2]

DiagramView::DiagramView ( DiagramList * list, QWidget * parent = nullptr )

explicit

Creates a view already containing a graph

Parameters

list	Contains a list of data points and metainformation to be displayed by the scene.
parent	The parent QWidget.

Definition at line 17 of file DiagramView.cpp.

    : QGraphicsView(parent)
{
    _scene = new DiagramScene(list);
    setScene(_scene);
    initialize();
}

References _scene, and initialize().

~DiagramView()

DiagramView::~DiagramView ( )

override

Definition at line 25 of file DiagramView.cpp.

{
    delete _scene;
}

References _scene.

Member Function Documentation

addGraph()

void DiagramView::addGraph

(

DiagramList *

list

)

Adds a new graph to the scene.

Definition at line 30 of file DiagramView.cpp.

{
    _scene->addGraph(list);
    update();
}

References _scene, and update().

getHeight()

int DiagramView::getHeight

(

)

Returns the height of the bounding rectangle of all objects within the scene.

Definition at line 36 of file DiagramView.cpp.

{
    return static_cast<int>((_scene->itemsBoundingRect()).height());
}

References _scene.

getWidth()

int DiagramView::getWidth

(

)

Returns the width of the bounding rectangle of all objects within the scene.

Definition at line 41 of file DiagramView.cpp.

{
    return static_cast<int>((_scene->itemsBoundingRect()).width());
}

References _scene.

initialize()

void DiagramView::initialize ( )

private

Initialises the view.

Definition at line 49 of file DiagramView.cpp.

{
    // QMatrix currentMatrix = matrix();
    // setMatrix(currentMatrix * scene->getTransformationMatrix());
 
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 
    update();
}

References update().

Referenced by DiagramView(), and DiagramView().

keepItemAspectRatio()

void DiagramView::keepItemAspectRatio ( )

private

minimumSizeHint()

QSize DiagramView::minimumSizeHint ( ) const

overrideprivate

Definition at line 81 of file DiagramView.cpp.

{
    return QSize(3 * DiagramScene::MARGIN, 2 * DiagramScene::MARGIN);
}

References DiagramScene::MARGIN.

resizeEvent()

void DiagramView::resizeEvent ( QResizeEvent * event )

overrideprotected

Resizes the scene.

Definition at line 91 of file DiagramView.cpp.

{
    Q_UNUSED(event)
    update();
    // keepItemAspectRatio();
}

References update().

sizeHint()

QSize DiagramView::sizeHint ( ) const

overrideprivate

Definition at line 86 of file DiagramView.cpp.

{
    return QSize(6 * DiagramScene::MARGIN, 4 * DiagramScene::MARGIN);
}

References DiagramScene::MARGIN.

update()

void DiagramView::update ( )

private

Updates the view automatically when a new list is added or when the window containing the view is resized or changes its state. Basically, the methods makes sure that everything keeps looking as it is supposed to.

Definition at line 104 of file DiagramView.cpp.

{
    // setResizeAnchor(QGraphicsView::AnchorViewCenter);
    QRectF viewRect = _scene->itemsBoundingRect();
    _scene->setSceneRect(viewRect);
    QRectF sceneInView(0 /*_scene->MARGIN*/, DiagramScene::MARGIN / 2,
                       viewRect.width() /*+_scene->MARGIN*/,
                       viewRect.height() + DiagramScene::MARGIN);
    fitInView(sceneInView, Qt::IgnoreAspectRatio);
}

References _scene, and DiagramScene::MARGIN.

Referenced by addGraph(), initialize(), and resizeEvent().

Member Data Documentation

_scene

DiagramScene* DiagramView::_scene

private

Definition at line 50 of file DiagramView.h.

Referenced by DiagramView(), DiagramView(), ~DiagramView(), addGraph(), getHeight(), getWidth(), and update().

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

• DiagramView.h
• DiagramView.cpp