Detailed Description

displays input curves P and Q.

Curves can be drawn separated for better readability.

If the algorithm for simple polygons is appplied, c-diagonals and t-diagonals are displayed.

Polygon edges and diagonals are mouse sensitive. When the mouse hovers over and edge (or diagonal) the corresponding edges of the feasible path are highlighted.

Author: Peter Schäfer

Definition at line 22 of file curveview.h.

#include <curveview.h>

Inherits frechet::view::BaseView.

Public Slots
void	setSeparateCurves (bool sep)
	update the display to show curves separately, or not More...

void	onAlgorithmChanged (int alg)
	called when the user changes the current algorithm. Update the curve display accordingly (e.g. show, or hide diagonals). More...

void	onHiliteSegment (int loc, int a, int b)
	called when a line segment should be highlighted More...

Public Slots inherited from frechet::view::BaseView
void	zoomIn (int level=-1)
	zoom in; connected to the zomm controls More...

void	zoomOut (int level=-1)
	connected to the zomm controls More...

void	flipVertical (bool flip)
	flip graphics scene vertically More...

void	mouseMoveEvent (QMouseEvent *event)
	handles a mouse move event and detects mouse sensitve polygon segments More...

QPoint	mapSceneToGlobal (QPointF p) const
	map scene coordinates to window coordinate More...

Signals
void	hiliteSegment (int loc, int a, int b)
	raised when a mouse sensitive line segment is highlighted. Parameters identify the location of the line segment. More...

Public Member Functions
	CurveView (QWidget *parent=0)
	default constructor with parent More...

void	populateScene (const Curve &P, const Curve &Q, frechet::poly::Algorithm::ptr alg)
	set up the graphics scene with polygonal curves More...

virtual void	saveSettings (QSettings &settings, QString group)
	store settings to application preferences More...

virtual void	restoreSettings (QSettings &settings, QString group)
	load settings from application preferences More...

bool	separateCurves () const

virtual void	segmentSelected (GraphicsHoverLineItem *item) override
	called when the mouse hovers over a sensitive line segment. Updates the corresponding line segments. More...

Public Member Functions inherited from frechet::view::BaseView
	BaseView (QWidget *parent=0, QString title="", bool showRotate=true)
	constructore with parent and title More...

QGraphicsView *	view () const

Private Member Functions
void	doHiliteSegment (GraphicsHoverLineItem::Location loc, int a, int b)
	highlight a line segment More...

QGraphicsItemGroup *	addPolygonToScene (const Curve &poly, QPen pen, GraphicsHoverLineItem::Location hover)
	add a polygon curve to the graphics scene More...

QGraphicsItemGroup *	addSegmentsToScene (QGraphicsItemGroup *group, frechet::poly::Triangulation::Edge_range d, const frechet::poly::Segments &exclude, bool with_edges, QPen pen, GraphicsHoverLineItem::Location hover)
	add a number of line segments to the graphics scene More...

QGraphicsItemGroup *	addSegmentsToScene (QGraphicsItemGroup *group, const frechet::poly::Segments &d, bool with_edges, QPen pen, const Curve &P, GraphicsHoverLineItem::Location hover)
	add a number of line segments to the graphics scene More...

QGraphicsLineItem *	createLineItem (QLineF line, QPen pen, frechet::poly::Segment seg, QGraphicsItemGroup *group, GraphicsHoverLineItem::Location hover)
	create a line segment graphics item More...

Private Attributes
bool	_separate
	draw curves separately? More...

QGraphicsItemGroup *	polygon_a
	graphics items for (boundary of) curve P More...

QGraphicsItemGroup *	polygon_b
	graphics items for (boundary of) curve Q More...

QGraphicsItemGroup *	diagonals_a
	graphics items for diagonals of curve P More...

QGraphicsItemGroup *	diagonals_b

QRectF	polygon_bounds
	boundary rectangle for both curves More...

QGraphicsPathItem *	select_a
	highlited items for curve P More...

QGraphicsPathItem *	select_b
	highlited items for curve Q More...

Static Private Attributes
static const QPen	PEN_A
	pen for drawing the curve P More...

static const QPen	PEN_B
	pen for drawing the curve Q More...

static const QPen	PEN_C_DIAGS
	pen for drawing the c-diagonals in P More...

static const QPen	PEN_T_DIAGS
	pen for drawing the t-diagonals in P More...

static const QPen	PEN_PASSIVE_DIAGS

static const double	SEPARATOR = 0.06
	distance when curves are displayed separately More...

Friends
class	GraphicsHoverLineItem

Additional Inherited Members
Protected Slots inherited from frechet::view::BaseView
void	resetView ()
	reset zoom to default More...

void	setResetButtonEnabled ()
	enabled reset button More...

void	setupMatrix ()
	set up transformation matrix to account for zoom,rotate,scroll More...

void	print ()
	print the contents of the graphics scene More...

void	saveAs ()
	save the contents of the graphics scene to disk (as PDF, or SVG) More...

void	rotateLeft (double angle=10)
	rotate the scene to the left More...

void	rotateRight (double angle=10)
	rotate the scene to the right More...

int	rotation () const

void	setRotation (double angle)
	update rotation angle More...

Protected Member Functions inherited from frechet::view::BaseView
void	resizeEvent (QResizeEvent *) override
	handles window resizes; adjusts controls to new window size More...

void	saveAsPdf (QString file)
	save content of scene to a PDF file More...

void	saveAsSvg (QString file)
	save content of scene to an SVG file More...

virtual void	dropUnusedItems ()
	clean up graphics scene items after free-space is modified implemented by FreeSpaceView. More...

virtual void	render (QPainter *painter, QRectF target=QRectF())
	render the scene into a QPainter used for printing and saving to disk More...

QMatrix	baseMatrix ()

Static Protected Member Functions inherited from frechet::view::BaseView
static void	setPenWidth (QGraphicsItem *item, double width)
	update the pen width of a graphics item More...

static void	addLine (QPainterPath &ppath, const QLineF &line)
	add a line segment to a QPainterPath More...

static void	addPolygon (QPainterPath &ppath, const QPolygonF &poly)
	add a polygon curve segment to a QPainterPath More...

static void	addPoint (QPainterPath &ppath, const QPointF &point, double diameter=1.0)
	add a dot to a QPainterPath More...

Protected Attributes inherited from frechet::view::BaseView
QGraphicsView *	graphicsView
	the embedded QGraphicsView More...

QGraphicsScene *	scene
	scene that is displayed by graphicsView More...

bool	isFlipped
	true if the scene should be flipped vertically More...

int	zoomStepMouse
	zoom step for mouse wheel More...

int	zoomStepDefault
	default zoom step More...

QToolButton *	resetButton
	the reset button More...

QSlider *	zoomSlider
	the slider control for zoom More...

QSlider *	rotateSlider
	the slider control for rotate More...

GraphicsHoverLineItem *	selected_item
	the currently selected mouse sensitve polyon segment (or nullptr) More...

Static Protected Attributes inherited from frechet::view::BaseView
static const QPen	PEN_SELECT
	pen for drawing selected polygon segment More...

static const int	ROTATE_DEFAULT_VALUE = 0
	what this? More...

static const QStringList	OUTPUT_FILTERS
	file name filters for save dialog More...

Constructor & Destructor Documentation

◆ CurveView()

CurveView::CurveView ( QWidget * parent = 0 )

default constructor with parent

Parameters

parent parent widget (optional)

Definition at line 21 of file curveview.cpp.

Member Function Documentation

◆ addPolygonToScene()

QGraphicsItemGroup * CurveView::addPolygonToScene	(	const Curve &	poly,
		QPen	pen,
		GraphicsHoverLineItem::Location	hover
	)

private

add a polygon curve to the graphics scene

Parameters

poly	the polygon curve
pen	pen for drawing the curve
hover	hover location

Returns: a group of graphics items

Definition at line 106 of file curveview.cpp.

◆ addSegmentsToScene() [1/2]

QGraphicsItemGroup* frechet::view::CurveView::addSegmentsToScene	(	QGraphicsItemGroup *	group,
		frechet::poly::Triangulation::Edge_range	d,
		const frechet::poly::Segments &	exclude,
		bool	with_edges,
		QPen	pen,
		GraphicsHoverLineItem::Location	hover
	)

private

add a number of line segments to the graphics scene

Parameters

group	group to add the items to
d	a number of polygon edges
exclude	set of segments to exclude
with_edges	include outer edges?
pen	pen for drawing
hover	hover location

Returns: a group of graphics items

◆ addSegmentsToScene() [2/2]

QGraphicsItemGroup* frechet::view::CurveView::addSegmentsToScene	(	QGraphicsItemGroup *	group,
		const frechet::poly::Segments &	d,
		bool	with_edges,
		QPen	pen,
		const Curve &	P,
		GraphicsHoverLineItem::Location	hover
	)

private

add a number of line segments to the graphics scene

Parameters

group	group to add the items to
d	a number of polygon edges
with_edges	include outer edges?
pen	pen for drawing
P	polygonal curve
hover	hover location

Returns: a group of graphics items

◆ createLineItem()

QGraphicsLineItem * CurveView::createLineItem	(	QLineF	line,
		QPen	pen,
		frechet::poly::Segment	seg,
		QGraphicsItemGroup *	group,
		GraphicsHoverLineItem::Location	hover
	)

private

create a line segment graphics item

Parameters

line	the line segment
pen	pen for drawing
seg	the associated polygon segment
group	p group to add the items to
hover	hover location

Returns: a graphics item

Definition at line 167 of file curveview.cpp.

◆ doHiliteSegment()

void CurveView::doHiliteSegment	(	GraphicsHoverLineItem::Location	loc,
		int	a,
		int	b
	)

private

highlight a line segment

Parameters

loc	location on screen
a	identifier
b	identifier

See also: GraphicsHoverLineItem

Definition at line 273 of file curveview.cpp.

◆ hiliteSegment

void frechet::view::CurveView::hiliteSegment	(	int	loc,
		int	a,
		int	b
	)

signal

raised when a mouse sensitive line segment is highlighted. Parameters identify the location of the line segment.

Parameters

loc	location on screen
a	identifier
b	identifier

See also: GraphicsHoverLineItem

◆ onAlgorithmChanged

void CurveView::onAlgorithmChanged ( int alg )

slot

called when the user changes the current algorithm. Update the curve display accordingly (e.g. show, or hide diagonals).

Parameters

alg	current algorithm

See also: FrechetViewAlgorithm::Algorithm

Definition at line 355 of file curveview.cpp.

◆ onHiliteSegment

void CurveView::onHiliteSegment	(	int	loc,
		int	a,
		int	b
	)

slot

called when a line segment should be highlighted

Parameters

loc	location on screen
a	identifier
b	identifier

See also: GraphicsHoverLineItem

Definition at line 268 of file curveview.cpp.

◆ populateScene()

void CurveView::populateScene	(	const Curve &	P,
		const Curve &	Q,
		frechet::poly::Algorithm::ptr	alg
	)

set up the graphics scene with polygonal curves

Parameters

P	the first input curve
Q	the second input curve
alg	the algorithm for simple polygons

Definition at line 32 of file curveview.cpp.

◆ restoreSettings()

void CurveView::restoreSettings	(	QSettings &	settings,
		QString	group
	)

virtual

load settings from application preferences

Parameters

settings	application preferences
group	section where to store settings

Reimplemented from frechet::view::BaseView.

Definition at line 189 of file curveview.cpp.

◆ saveSettings()

void CurveView::saveSettings	(	QSettings &	settings,
		QString	group
	)

virtual

store settings to application preferences

Parameters

settings	application preferences
group	section where to store settings

Reimplemented from frechet::view::BaseView.

Definition at line 180 of file curveview.cpp.

◆ segmentSelected()

void CurveView::segmentSelected ( GraphicsHoverLineItem * item )

overridevirtual

called when the mouse hovers over a sensitive line segment. Updates the corresponding line segments.

Parameters

item	the line segment

Reimplemented from frechet::view::BaseView.

Definition at line 252 of file curveview.cpp.

◆ separateCurves()

bool frechet::view::CurveView::separateCurves ( ) const

inline

Returns: true if curves are displayed beneath each other

Definition at line 56 of file curveview.h.

◆ setSeparateCurves

void CurveView::setSeparateCurves ( bool sep )

slot

update the display to show curves separately, or not

Parameters

sep	true if the curves should be displayed separately

Definition at line 200 of file curveview.cpp.

Friends And Related Function Documentation

◆ GraphicsHoverLineItem

friend class GraphicsHoverLineItem

friend

Definition at line 178 of file curveview.h.

Member Data Documentation

◆ _separate

bool frechet::view::CurveView::_separate

private

draw curves separately?

Definition at line 115 of file curveview.h.

◆ diagonals_a

QGraphicsItemGroup* frechet::view::CurveView::diagonals_a

private

graphics items for diagonals of curve P

Definition at line 119 of file curveview.h.

◆ diagonals_b

QGraphicsItemGroup* frechet::view::CurveView::diagonals_b

private

graphics items for diagonals of curve Q

Definition at line 120 of file curveview.h.

◆ PEN_A

const QPen CurveView::PEN_A

staticprivate

pen for drawing the curve P

Definition at line 107 of file curveview.h.

◆ PEN_B

const QPen CurveView::PEN_B

staticprivate

pen for drawing the curve Q

Definition at line 108 of file curveview.h.

◆ PEN_C_DIAGS

const QPen CurveView::PEN_C_DIAGS

staticprivate

pen for drawing the c-diagonals in P

Definition at line 109 of file curveview.h.

◆ PEN_PASSIVE_DIAGS

const QPen CurveView::PEN_PASSIVE_DIAGS

staticprivate

pen for drawing the diagonals in Q

Definition at line 111 of file curveview.h.

◆ PEN_T_DIAGS

const QPen CurveView::PEN_T_DIAGS

staticprivate

pen for drawing the t-diagonals in P

Definition at line 110 of file curveview.h.

◆ polygon_a

QGraphicsItemGroup* frechet::view::CurveView::polygon_a

private

graphics items for (boundary of) curve P

Definition at line 117 of file curveview.h.

◆ polygon_b

QGraphicsItemGroup* frechet::view::CurveView::polygon_b

private

graphics items for (boundary of) curve Q

Definition at line 118 of file curveview.h.

◆ polygon_bounds

QRectF frechet::view::CurveView::polygon_bounds

private

boundary rectangle for both curves

Definition at line 122 of file curveview.h.

◆ select_a

QGraphicsPathItem* frechet::view::CurveView::select_a

private

highlited items for curve P

Definition at line 124 of file curveview.h.

◆ select_b

QGraphicsPathItem* frechet::view::CurveView::select_b

private

highlited items for curve Q

Definition at line 125 of file curveview.h.

◆ SEPARATOR

const double CurveView::SEPARATOR = 0.06

staticprivate

distance when curves are displayed separately

Definition at line 113 of file curveview.h.

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

include/frechet/view/curveview.h
src/frechet/view/curveview.cpp

Detailed Description

Public Slots

Signals

Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Additional Inherited Members

Constructor & Destructor Documentation

◆ CurveView()

Member Function Documentation

◆ addPolygonToScene()

◆ addSegmentsToScene() [1/2]

◆ addSegmentsToScene() [2/2]

◆ createLineItem()

◆ doHiliteSegment()

◆ hiliteSegment

◆ onAlgorithmChanged

◆ onHiliteSegment

◆ populateScene()

◆ restoreSettings()

◆ saveSettings()

◆ segmentSelected()

◆ separateCurves()

◆ setSeparateCurves

Friends And Related Function Documentation

◆ GraphicsHoverLineItem

Member Data Documentation

◆ _separate

◆ diagonals_a

◆ diagonals_b

◆ PEN_A

◆ PEN_B

◆ PEN_C_DIAGS

◆ PEN_PASSIVE_DIAGS

◆ PEN_T_DIAGS

◆ polygon_a

◆ polygon_b

◆ polygon_bounds

◆ select_a

◆ select_b

◆ SEPARATOR