Detailed Description

a QGraphicsLitem that can handle mouse hover events. It is used to highlight mouse sensitve polygon segments.

Each line segment has a "logical" identifier within a polygonal curve, or feasible paht.

Definition at line 239 of file baseview.h.

#include <baseview.h>

Inherits QGraphicsLineItem.

Public Types
enum	Location { None, P, Q, Pdiag, Qdiag, FS }
	location of the polygon segment More...

Public Member Functions
	GraphicsHoverLineItem (QLineF line, Location loc, int a, int b, QGraphicsItemGroup *group)
	default constructor More...

void	update (int a, int b)
	update identifiers More...

bool	is_close_to (QPointF scene_pos, int distance) const
	check if the mouse is close to the line segment More...

Public Attributes
const Location	loc
	location on screen More...

const int	a
	parameters loc,a, and b identify a segment. More...

const int	b

Member Enumeration Documentation

◆ Location

enum frechet::view::GraphicsHoverLineItem::Location

location of the polygon segment

Enumerator
None	used for segments that are not mouse sensitive
P	a boundary segment of P
Q	a boundary segment of Q
Pdiag	a diagonal of P
Qdiag	a diagonal of Q
FS	a segment of the feasible paht (displayed in the free-space diagram)

Definition at line 243 of file baseview.h.

Constructor & Destructor Documentation

◆ GraphicsHoverLineItem()

GraphicsHoverLineItem::GraphicsHoverLineItem	(	QLineF	line,
		Location	loc,
		int	a,
		int	b,
		QGraphicsItemGroup *	group
	)

default constructor

Parameters

line	a line
loc	location on screen
a	segment identifier
b	segment identifier
group	group to add to

Definition at line 661 of file baseview.cpp.

Member Function Documentation

◆ is_close_to()

bool GraphicsHoverLineItem::is_close_to	(	QPointF	scene_pos,
		int	distance
	)		const

check if the mouse is close to the line segment

Parameters

scene_pos	mouse position in scene coordinates
distance	max. distance to accept as hover

Returns: true if the mouse is close to the line segment

Definition at line 674 of file baseview.cpp.

◆ update()

void GraphicsHoverLineItem::update	(	int	a,
		int	b
	)

update identifiers

Definition at line 669 of file baseview.cpp.

Member Data Documentation

◆ a

const int frechet::view::GraphicsHoverLineItem::a

parameters loc,a, and b identify a segment.

loc==P,Q,Pdiag,Qdiag: a,b are vertex indexes into P,Q.
loc==FS: a is an index into the feasible path.

Definition at line 257 of file baseview.h.

◆ b

const int frechet::view::GraphicsHoverLineItem::b

Definition at line 257 of file baseview.h.

◆ loc

const Location frechet::view::GraphicsHoverLineItem::loc

location on screen

Definition at line 251 of file baseview.h.

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

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