Package org.openstreetmap.josm.actions.mapmode

Class DrawSnapHelper

java.lang.Object

org.openstreetmap.josm.actions.mapmode.DrawSnapHelper

class DrawSnapHelper
extends java.lang.Object

Class that enables the user to draw way segments in angles of exactly 30, 45, 60, 90 degrees. With enabled snapping, the new way node will be projected onto the helper line that indicates a certain fixed angle relative to the previous segment.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	DrawSnapHelper.AnglePopupMenu
private static class	DrawSnapHelper.DisableAction
private static class	DrawSnapHelper.HelperAction
private static class	DrawSnapHelper.ProjectionAction
private static class	DrawSnapHelper.RepeatedAction
private static class	DrawSnapHelper.Snap30DegreesAction
private static class	DrawSnapHelper.Snap45DegreesAction
private static class	DrawSnapHelper.Snap90DegreesAction

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	absoluteFix
private boolean	active
(package private) java.awt.event.MouseListener	anglePopupListener
private javax.swing.JCheckBoxMenuItem	checkBox
private double	customBaseHeading
(package private) EastNorth	dir2
private static java.lang.String	DRAW_ANGLESNAP_ANGLES
private DrawAction	drawAction
private double	e0
private boolean	fixed
private java.lang.String	fixFmt
private java.lang.String	labelText
private double	lastAngle
private double	n0
private double	pe
private double	pn
private EastNorth	projected
private EastNorth	projectionSource
private EastNorth	segmentPoint1
private EastNorth	segmentPoint2
private double[]	snapAngles
private boolean	snapOn

Constructor Summary

Constructors

Constructor	Description
DrawSnapHelper(DrawAction drawAction)	Constructs a new SnapHelper.

Method Summary

Modifier and Type	Method	Description
private void	buildLabelText(double nearestAngle)
void	checkAngleSnapping(EastNorth currentEN, double baseHeading, double curHeading)	If mouse position is close to line at 15-30-45-...
private void	computeSnapAngles()
void	drawIfNeeded(java.awt.Graphics2D g2, MapViewState mv)	Draw the snap hint line.
(package private) void	enableSnapping()	Enable snapping.
private static double	getAngleDelta(double a, double b)
private double	getNearestAngle(double angle)
EastNorth	getSnapPoint(EastNorth p)	Gets a snap point close to p.
void	init()	Set the initial state
(package private) boolean	isActive()
(package private) boolean	isSnapOn()
(package private) void	noSnapNow()	Disables snapping
private static double	parseSnapAngle(java.lang.String string)
void	saveAngles(java.lang.String... angles)	Save the snap angles
(package private) void	setBaseSegment(WaySegment seg)
(package private) void	setFixedMode()
void	setMenuCheckBox(javax.swing.JCheckBoxMenuItem checkBox)	Sets the menu checkbox.
(package private) void	toggleSnapping()
(package private) void	unFixOrTurnOff()
(package private) void	unsetFixedMode()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

drawAction

private final DrawAction drawAction

DRAW_ANGLESNAP_ANGLES

private static final java.lang.String DRAW_ANGLESNAP_ANGLES

See Also:

Constant Field Values

snapOn

private boolean snapOn

active

private boolean active

fixed

private boolean fixed

absoluteFix

private boolean absoluteFix

dir2

EastNorth dir2

projected

private EastNorth projected

labelText

private java.lang.String labelText

lastAngle

private double lastAngle

customBaseHeading

private double customBaseHeading

segmentPoint1

private EastNorth segmentPoint1

segmentPoint2

private EastNorth segmentPoint2

projectionSource

private EastNorth projectionSource

snapAngles

private double[] snapAngles

pe

private double pe

pn

private double pn

e0

private double e0

n0

private double n0

fixFmt

private final java.lang.String fixFmt

checkBox

private javax.swing.JCheckBoxMenuItem checkBox

anglePopupListener

final java.awt.event.MouseListener anglePopupListener

Constructor Detail

DrawSnapHelper

DrawSnapHelper(DrawAction drawAction)

Constructs a new SnapHelper.

Parameters:

drawAction - enclosing DrawAction

Method Detail

init

public void init()

Set the initial state

computeSnapAngles

private void computeSnapAngles()

parseSnapAngle

private static double parseSnapAngle(java.lang.String string)

saveAngles

public void saveAngles(java.lang.String... angles)

Save the snap angles

Parameters:

angles - The angles

setMenuCheckBox

public void setMenuCheckBox(javax.swing.JCheckBoxMenuItem checkBox)

Sets the menu checkbox.

Parameters:

checkBox - menu checkbox

drawIfNeeded

public void drawIfNeeded(java.awt.Graphics2D g2,
                         MapViewState mv)

Draw the snap hint line.

Parameters:

g2 - graphics

mv - MapView state

Since:

10874

checkAngleSnapping

public void checkAngleSnapping(EastNorth currentEN,
                               double baseHeading,
                               double curHeading)

If mouse position is close to line at 15-30-45-... angle, remembers this direction

Parameters:

currentEN - Current position

baseHeading - The heading

curHeading - The current mouse heading

buildLabelText

private void buildLabelText(double nearestAngle)

getSnapPoint

public EastNorth getSnapPoint(EastNorth p)

Gets a snap point close to p. Stores the result for display.

Parameters:

p - The point

Returns:

The snap point close to p.

noSnapNow

void noSnapNow()

Disables snapping

setBaseSegment

void setBaseSegment(WaySegment seg)

enableSnapping

void enableSnapping()

Enable snapping.

toggleSnapping

void toggleSnapping()

setFixedMode

void setFixedMode()

unsetFixedMode

void unsetFixedMode()

isActive

boolean isActive()

isSnapOn

boolean isSnapOn()

getNearestAngle

private double getNearestAngle(double angle)

getAngleDelta

private static double getAngleDelta(double a,
                                    double b)

unFixOrTurnOff

void unFixOrTurnOff()