The abstract base class for layouts. More...

Inheritance diagram for QCPLayout:

Public Member Functions
	QCPLayout ()

virtual void	update (UpdatePhase phase) Q_DECL_OVERRIDE

virtual QList< QCPLayoutElement * >	elements (bool recursive) const Q_DECL_OVERRIDE

virtual int	elementCount () const =0

virtual QCPLayoutElement *	elementAt (int index) const =0

virtual QCPLayoutElement *	takeAt (int index)=0

virtual bool	take (QCPLayoutElement *element)=0

virtual void	simplify ()

bool	removeAt (int index)

bool	remove (QCPLayoutElement *element)

void	clear ()

Public Member Functions inherited from QCPLayoutElement
	QCPLayoutElement (QCustomPlot *parentPlot=nullptr)

QCPLayout *	layout () const

QRect	rect () const

QRect	outerRect () const

QMargins	margins () const

QMargins	minimumMargins () const

QCP::MarginSides	autoMargins () const

QSize	minimumSize () const

QSize	maximumSize () const

SizeConstraintRect	sizeConstraintRect () const

QCPMarginGroup *	marginGroup (QCP::MarginSide side) const

QHash< QCP::MarginSide, QCPMarginGroup * >	marginGroups () const

void	setOuterRect (const QRect &rect)

void	setMargins (const QMargins &margins)

void	setMinimumMargins (const QMargins &margins)

void	setAutoMargins (QCP::MarginSides sides)

void	setMinimumSize (const QSize &size)

void	setMinimumSize (int width, int height)

void	setMaximumSize (const QSize &size)

void	setMaximumSize (int width, int height)

void	setSizeConstraintRect (SizeConstraintRect constraintRect)

void	setMarginGroup (QCP::MarginSides sides, QCPMarginGroup *group)

virtual QSize	minimumOuterSizeHint () const

virtual QSize	maximumOuterSizeHint () const

virtual double	selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=nullptr) const Q_DECL_OVERRIDE

Public Member Functions inherited from QCPLayerable
	QCPLayerable (QCustomPlot plot, QString targetLayer=QString(), QCPLayerable parentLayerable=nullptr)

bool	visible () const

QCustomPlot *	parentPlot () const

QCPLayerable *	parentLayerable () const

QCPLayer *	layer () const

bool	antialiased () const

void	setVisible (bool on)

Q_SLOT bool	setLayer (QCPLayer *layer)

bool	setLayer (const QString &layerName)

void	setAntialiased (bool enabled)

bool	realVisibility () const

Protected Member Functions
virtual void	updateLayout ()

void	sizeConstraintsChanged () const

void	adoptElement (QCPLayoutElement *el)

void	releaseElement (QCPLayoutElement *el)

QVector< int >	getSectionSizes (QVector< int > maxSizes, QVector< int > minSizes, QVector< double > stretchFactors, int totalSize) const

Protected Member Functions inherited from QCPLayoutElement
virtual int	calculateAutoMargin (QCP::MarginSide side)

virtual void	layoutChanged ()

virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const Q_DECL_OVERRIDE

virtual void	draw (QCPPainter *painter) Q_DECL_OVERRIDE

virtual void	parentPlotInitialized (QCustomPlot *parentPlot) Q_DECL_OVERRIDE

Protected Member Functions inherited from QCPLayerable
virtual QCP::Interaction	selectionCategory () const

virtual QRect	clipRect () const

virtual void	selectEvent (QMouseEvent event, bool additive, const QVariant &details, bool selectionStateChanged)

virtual void	deselectEvent (bool *selectionStateChanged)

virtual void	mousePressEvent (QMouseEvent *event, const QVariant &details)

virtual void	mouseMoveEvent (QMouseEvent *event, const QPointF &startPos)

virtual void	mouseReleaseEvent (QMouseEvent *event, const QPointF &startPos)

virtual void	mouseDoubleClickEvent (QMouseEvent *event, const QVariant &details)

virtual void	wheelEvent (QWheelEvent *event)

void	initializeParentPlot (QCustomPlot *parentPlot)

void	setParentLayerable (QCPLayerable *parentLayerable)

bool	moveToLayer (QCPLayer *layer, bool prepend)

void	applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const

Static Protected Member Functions
static QSize	getFinalMinimumOuterSize (const QCPLayoutElement *el)

static QSize	getFinalMaximumOuterSize (const QCPLayoutElement *el)

Friends
class	QCPLayoutElement

Additional Inherited Members
Public Types inherited from QCPLayoutElement
enum	UpdatePhase { upPreparation , upMargins , upLayout }

enum	SizeConstraintRect { scrInnerRect , scrOuterRect }

Signals inherited from QCPLayerable
void	layerChanged (QCPLayer *newLayer)

Protected Attributes inherited from QCPLayoutElement
QCPLayout *	mParentLayout

QSize	mMinimumSize

QSize	mMaximumSize

SizeConstraintRect	mSizeConstraintRect

QRect	mRect

QRect	mOuterRect

QMargins	mMargins

QMargins	mMinimumMargins

QCP::MarginSides	mAutoMargins

QHash< QCP::MarginSide, QCPMarginGroup * >	mMarginGroups

Protected Attributes inherited from QCPLayerable
bool	mVisible

QCustomPlot *	mParentPlot

QPointer< QCPLayerable >	mParentLayerable

QCPLayer *	mLayer

bool	mAntialiased

Detailed Description

The abstract base class for layouts.

This is an abstract base class for layout elements whose main purpose is to define the position and size of other child layout elements. In most cases, layouts don't draw anything themselves (but there are exceptions to this, e.g. QCPLegend).

QCPLayout derives from QCPLayoutElement, and thus can itself be nested in other layouts.

QCPLayout introduces a common interface for accessing and manipulating the child elements. Those functions are most notably elementCount, elementAt, takeAt, take, simplify, removeAt, remove and clear. Individual subclasses may add more functions to this interface which are more specialized to the form of the layout. For example, QCPLayoutGrid adds functions that take row and column indices to access cells of the layout grid more conveniently.

Since this is an abstract base class, you can't instantiate it directly. Rather use one of its subclasses like QCPLayoutGrid or QCPLayoutInset.

For a general introduction to the layout system, see the dedicated documentation page The Layout System.

Constructor & Destructor Documentation

◆ QCPLayout()

QCPLayout::QCPLayout ( )

explicit

Creates an instance of QCPLayout and sets default values. Note that since QCPLayout is an abstract base class, it can't be instantiated directly.

Member Function Documentation

◆ clear()

void QCPLayout::clear ( )

Removes and deletes all layout elements in this layout. Finally calls simplify to make sure all empty cells are collapsed.

See also: remove, removeAt

◆ elementAt()

virtual QCPLayoutElement * QCPLayout::elementAt ( int index ) const

pure virtual

Returns the element in the cell with the given index. If index is invalid, returns nullptr.

Note that even if index is valid, the respective cell may be empty in some layouts (e.g. QCPLayoutGrid), so this function may return nullptr in those cases. You may use this function to check whether a cell is empty or not.

See also: elements, elementCount, takeAt

Implemented in QCPLayoutGrid, and QCPLayoutInset.

◆ elementCount()

virtual int QCPLayout::elementCount ( ) const

pure virtual

Returns the number of elements/cells in the layout.

See also: elements, elementAt

Implemented in QCPLayoutGrid, and QCPLayoutInset.

◆ elements()

QList< QCPLayoutElement * > QCPLayout::elements ( bool recursive ) const

virtual

Returns a list of all child elements in this layout element. If recursive is true, all sub-child elements are included in the list, too.

Warning: There may be nullptr entries in the returned list. For example, QCPLayoutGrid may have empty cells which yield nullptr at the respective index.

Reimplemented from QCPLayoutElement.

Reimplemented in QCPLayoutGrid.

◆ remove()

bool QCPLayout::remove ( QCPLayoutElement * element )

Removes and deletes the provided element. Returns true on success. If element is not in the layout, returns false.

This function internally uses takeAt to remove the element from the layout and then deletes the element. Note that some layouts don't remove the respective cell right away but leave an empty cell after successful removal of the layout element. To collapse empty cells, use simplify.

See also: removeAt, take

◆ removeAt()

bool QCPLayout::removeAt ( int index )

Removes and deletes the element at the provided index. Returns true on success. If index is invalid or points to an empty cell, returns false.

This function internally uses takeAt to remove the element from the layout and then deletes the returned element. Note that some layouts don't remove the respective cell right away but leave an empty cell after successful removal of the layout element. To collapse empty cells, use simplify.

See also: remove, takeAt

◆ simplify()

void QCPLayout::simplify ( )

virtual

Simplifies the layout by collapsing empty cells. The exact behavior depends on subclasses, the default implementation does nothing.

Not all layouts need simplification. For example, QCPLayoutInset doesn't use explicit simplification while QCPLayoutGrid does.

Reimplemented in QCPLayoutGrid, and QCPLayoutInset.

◆ sizeConstraintsChanged()

void QCPLayout::sizeConstraintsChanged ( ) const

protected

Subclasses call this method to report changed (minimum/maximum) size constraints.

If the parent of this layout is again a QCPLayout, forwards the call to the parent's sizeConstraintsChanged. If the parent is a QWidget (i.e. is the QCustomPlot::plotLayout of QCustomPlot), calls QWidget::updateGeometry, so if the QCustomPlot widget is inside a Qt QLayout, it may update itself and resize cells accordingly.

◆ take()

virtual bool QCPLayout::take ( QCPLayoutElement * element )

pure virtual

Removes the specified element from the layout and returns true on success.

If the element isn't in this layout, returns false.

Note that some layouts don't remove the respective cell right away but leave an empty cell after successful removal of the layout element. To collapse empty cells, use simplify.

See also: takeAt

Implemented in QCPLayoutGrid, and QCPLayoutInset.

◆ takeAt()

virtual QCPLayoutElement * QCPLayout::takeAt ( int index )

pure virtual

Removes the element with the given index from the layout and returns it.

If the index is invalid or the cell with that index is empty, returns nullptr.

Note that some layouts don't remove the respective cell right away but leave an empty cell after successful removal of the layout element. To collapse empty cells, use simplify.

See also: elementAt, take

Implemented in QCPLayoutGrid, and QCPLayoutInset.

◆ update()

void QCPLayout::update ( UpdatePhase phase )

virtual

If phase is upLayout, calls updateLayout, which subclasses may reimplement to reposition and resize their cells.

Finally, the call is propagated down to all child QCPLayoutElements.

For details about this method and the update phases, see the documentation of QCPLayoutElement::update.

Reimplemented from QCPLayoutElement.

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

app/NaFCSE/qcustomplot.h
app/NaFCSE/qcustomplot.cpp

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QCPLayout()

Member Function Documentation

◆ clear()

◆ elementAt()

◆ elementCount()

◆ elements()

◆ remove()

◆ removeAt()

◆ simplify()

◆ sizeConstraintsChanged()

◆ take()

◆ takeAt()

◆ update()