Interface to create bezier or straight lines from freehand motion. More...

Inheritance diagram for LaxInterfaces::FreehandInterface:

Public Member Functions
	FreehandInterface (anInterface nowner, int nid, Laxkit::Displayer ndp)
virtual anInterface *	duplicate (anInterface *dup)
	Return new FreehandInterface.
const char *	Name ()
const char *	whattype ()
const char *	whatdatatype ()
virtual int	UseThis (Laxkit::anObject *nlinestyle, unsigned int mask=0)
virtual int	InterfaceOn ()
virtual int	InterfaceOff ()
virtual void	Clear (SomeData *d)
virtual int	Refresh ()
virtual int	MouseMove (int x, int y, unsigned int state, const Laxkit::LaxMouse *d)
virtual int	LBDown (int x, int y, unsigned int state, int count, const Laxkit::LaxMouse *d)
	Start a new freehand line.
virtual int	LBUp (int x, int y, unsigned int state, const Laxkit::LaxMouse *d)
	Finish a new freehand line by calling newData with it.
Public Member Functions inherited from LaxInterfaces::anInterface
	anInterface ()
	This constructor assigns id=getUniqueNumber().
	anInterface (int nid)
	Constructor to assign just the id, set other stuff to 0.
	anInterface (int nid, Laxkit::Displayer *ndp)
	anInterface (anInterface *nowner, int nid)
	Constructor to assign owner and id.
	anInterface (anInterface nowner, int nid, Laxkit::Displayer ndp)
virtual Laxkit::ShortcutHandler *	GetShortcuts ()
	Return a ShortcutHandler that contains stacks of bound shortcuts and possible actions.
virtual int	PerformAction (int actionnumber)
virtual const char *	IconId ()
virtual int	draws (const char *atype)
	Returns !strcmp(whatdatatype(),atype).
virtual void	Clear ()
	Default just calls Clear(NULL).
virtual int	RemoveChild ()
	If there is a child, do something to remove it.
virtual int	AddChild (LaxInterfaces::anInterface *ch, int absorbcount, int addbefore)
virtual int	Needtodraw ()
	Must return nonzero if the data needs to be drawn, that is to say Refresh must be called.
virtual int	Needtodraw (int n)
virtual int	MBDown (int x, int y, unsigned int state, int count, const Laxkit::LaxMouse *d)
virtual int	RBDown (int x, int y, unsigned int state, int count, const Laxkit::LaxMouse *d)
virtual int	MBUp (int x, int y, unsigned int state, const Laxkit::LaxMouse *d)
virtual int	RBUp (int x, int y, unsigned int state, const Laxkit::LaxMouse *d)
virtual int	WheelUp (int x, int y, unsigned int state, int count, const Laxkit::LaxMouse *d)
virtual int	WheelDown (int x, int y, unsigned int state, int count, const Laxkit::LaxMouse *d)
virtual int	CharInput (unsigned int ch, const char buffer, int len, unsigned int state, const Laxkit::LaxKeyboard d)
virtual int	KeyUp (unsigned int ch, unsigned int state, const Laxkit::LaxKeyboard *d)
virtual int	DeviceChange (const Laxkit::DeviceEventData *e)
virtual int	Event (const Laxkit::EventData e, const char mes)
	Respond to events, particularly menu events from a menu created from ContextMenu().
virtual void	ExposeChange (Laxkit::ScreenEventData *e)
virtual void	ViewportResized ()
	Called after the parent viewport gets resized.
virtual void	Mapped ()
	Called after the parent viewport gets mapped (made visible).
virtual void	Unmapped ()
	Called after the parent viewport gets mapped (made invisible, such as offscreen, not merely obscured).
virtual void	PostMessage (const char *message)
	If viewport, use that, else app->postmessage().
virtual Laxkit::MenuInfo *	ContextMenu (int x, int y, int deviceid)
	Return a context sensitive menu for screen position (x,y).
virtual int	UseThis (int id, int ndata)
	Return 1 if the id/ndata is used, otherwise zero.
virtual int	UseThisObject (ObjectContext *oc)
virtual int	DrawData (Laxkit::anObject ndata, Laxkit::anObject a1=NULL, Laxkit::anObject *a2=NULL, int info=0)
	Redefine this for interfaces that can draw data not owned, without loosing current data.
virtual Laxkit::anXWindow *	CurrentWindow (Laxkit::anXWindow *ncur)
	Set the window the interface works on to ncur. Returns ncur. If ncur==NULL, then just return current viewport.
virtual ObjectContext *	Context ()
virtual void	Dp (Laxkit::Displayer *ndp)
	Set the dp to ndp, and update curwindow/viewport.
virtual int	DrawDataDp (Laxkit::Displayer tdp, SomeData tdata, Laxkit::anObject a1=NULL, Laxkit::anObject a2=NULL, int info=1)
	Use a different dp to draw data with.
virtual flatpoint	realtoscreen (flatpoint r)
	Do a little extra checking to find what point r should correspond to.
virtual flatpoint	screentoreal (int x, int y)
	Do a little extra checking to find what point (x,y) should correspond to.
virtual double	Getmag (int c=0)
	Do a little extra checking to find what the magnification is.
virtual double	GetVMag (int x, int y)
	Do a little extra checking to find what the magnification is.
virtual void	dump_out (FILE f, int indent, int what, Laxkit::anObject savecontext)
	Default settings saving is to output nothing.
virtual void	dump_in_atts (LaxFiles::Attribute att, int flag, Laxkit::anObject loadcontext)
	Placeholder for dumping in settings.
Public Member Functions inherited from LaxFiles::DumpUtility
virtual Attribute *	dump_out_atts (Attribute att, int what, Laxkit::anObject savecontext)
	Default is return NULL. what==0 means write out normal Attribute formatted things.
virtual void	dump_in (FILE f, int indent, int what, Laxkit::anObject loadcontext, Attribute **att)
	Read in a file segment as an Attribute, and pass parsing duties to dump_in_atts.
virtual	~DumpUtility ()
	Empty virtual destructor.

Public Attributes
unsigned int	freehand_style
double	mindist
Laxkit::ScreenColor	linecolor
Laxkit::ScreenColor	pointcolor
Laxkit::PtrStack< RawPointLine >	lines
Laxkit::NumStack< int >	deviceids
Public Attributes inherited from LaxInterfaces::anInterface
char *	name
	An instance name.. ***don't think this is used anywhere at the moment.
int	id
	Must be positive, other values are reserved for internal use.
unsigned long	style
	Style flags for the interface. Meaning depends on the interface.
int	interface_type
	What sort of interface this is. Default is INTERFACE_Tool.
Laxkit::anXApp *	app
	The application this interface works with.
Laxkit::anXWindow *	curwindow
	The window the interface currently works on.
anInterface *	owner
	The interface that owns this one.
anInterface *	child
	The child of this interface. See anInterface::owner. This is dec_counted in destructor.
int	primary
	Whether this is supposed to be a 'main' interface, or merely a helper.
int	needtodraw
	Whether the interface thinks it has to refresh.

Protected Member Functions
int	findLine (int id)
virtual int	send (int i)

Protected Attributes
char	showdecs
int	mx
int	my
LineStyle	linestyle
Protected Attributes inherited from LaxInterfaces::anInterface
Laxkit::ButtonDownInfo	buttondown
ViewportWindow *	viewport
	curwindow dynamically cast to ViewportWindow. Thus, it will be NULL if it is not a ViewportWindow.
Laxkit::Displayer *	dp
	The Displayer used by the controlling window.

Detailed Description

Interface to create bezier or straight lines from freehand motion.

On mouse down, this records all mouse movement, and converts the points into a bez curve (linear or cubic) on mouse up.

Todo:: ***Currently, this sucks. Should figure out how Sodipodi/inkscape does it.

Todo:: *** make closed when final point is close to first point

Member Function Documentation

anInterface * LaxInterfaces::FreehandInterface::duplicate ( anInterface * dup )

virtual

Return new FreehandInterface.

If dup!=NULL and it cannot be cast to ImageInterface, then return NULL.

Reimplemented from LaxInterfaces::anInterface.

int LaxInterfaces::FreehandInterface::MouseMove	(	int	x,
		int	y,
		unsigned int	state,
		const Laxkit::LaxMouse *	d
	)

virtual

Todo:: *** this isn't very sophisticated, for elegance, should use some kind of bez curve fitting to cut down on unnecessary points should use a timer so stopping makes sharp corners and closer spaced points?

Reimplemented from LaxInterfaces::anInterface.

References Laxkit::dp, Laxkit::PtrStack< T >::e, Laxkit::PtrStack< T >::push(), and Laxkit::Displayer::screentoreal().

int LaxInterfaces::FreehandInterface::Refresh ( )

virtual

Todo:: *** this is really cheezy, as it just copies bez->Refresh()

Reimplemented from LaxInterfaces::anInterface.

References Laxkit::dp, Laxkit::Displayer::drawpoint(), Laxkit::PtrStack< T >::e, Laxkit::Displayer::LineAttributes(), Laxkit::PtrStack< T >::n, Laxkit::Displayer::NewFG(), and Laxkit::Displayer::stroke().

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

freehandinterface.h
freehandinterface.cc

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation