Base class for WorldCanvas event-based polygon tools. More...

#include <MWCPolyTool.h>

Inheritance diagram for casa::MWCPolyTool:

Public Member Functions
	MWCPolyTool (Display::KeySym keysym=Display::K_Pointer_Button1, const casacore::Bool persistent=false)
	Constructor. More...

virtual	~MWCPolyTool ()
	Destructor. More...

virtual void	disable ()
	Switch the tool off - this calls the base class disable, and then erases the polygon if it's around. More...

virtual void	reset (casacore::Bool skipRefresh=false)
	reset to non-existent, non-active polygon. More...

virtual casacore::Bool	polygonDefined ()
	Is a polygon currently defined? More...

Public Member Functions inherited from casa::MultiWCTool
	MultiWCTool (const Display::KeySym &keysym=Display::K_Pointer_Button1, bool enable_events=true)
	Constructor taking the primary key to which this tool will respond. More...

virtual	~MultiWCTool ()
	Destructor. More...

virtual void	addWorldCanvas (WorldCanvas &worldcanvas)
	Add/remove a WorldCanvas from the control of this tool. More...

virtual void	removeWorldCanvas (WorldCanvas &worldcanvas)

virtual void	addWorldCanvases (PanelDisplay *pdisp)
	Add/Remove a list of WorldCanvases from PanelDisplay. More...

virtual void	removeWorldCanvases (PanelDisplay *pdisp)

virtual void	enable ()
	Switch the tool on/off - this simply registers or unregisters the event handlers on the WorldCanvases. More...

virtual void	operator() (const WCPositionEvent &ev)
	Required operators for event handling - these are called when events occur, and distribute the events to the "user-level" methods. More...

virtual void	operator() (const WCMotionEvent &ev)
	default sends event to cout More...

virtual void	operator() (const WCRefreshEvent &ev)
	original handler interface (still used for WCRefreshEvents) More...

Public Member Functions inherited from casa::DisplayTool
virtual	~DisplayTool ()
	Destructor. More...

virtual void	setKey (const Display::KeySym &keysym)
	Set/get which key to catch. More...

virtual Display::KeySym	getKey () const

Public Member Functions inherited from casa::WCPositionEH
	WCPositionEH ()
	Default Constructor Required. More...

virtual	~WCPositionEH ()
	Destructor. More...

Public Member Functions inherited from casa::WCMotionEH
	WCMotionEH ()
	Default Constructor Required. More...

virtual	~WCMotionEH ()
	Destructor. More...

Public Member Functions inherited from casa::WCRefreshEH
	WCRefreshEH ()
	Default Constructor Required. More...

virtual	~WCRefreshEH ()
	Destructor. More...

Public Member Functions inherited from casa::DisplayEH
virtual void	handleEvent (DisplayEvent &)
	Classes that contain this interface (i.e., derive from it) can override this method to implement actions for whatever types of DisplayEvent they're interested in. More...

virtual	~DisplayEH ()

Public Member Functions inherited from casa::DTVisible
	DTVisible ()
	Default constructor. More...

virtual	~DTVisible ()
	Destructor. More...

virtual casacore::String	drawColor () const
	Return the color to use. More...

virtual casacore::Int	lineWidth () const
	Return the line width to use. More...

virtual casacore::Double	doubleClickInterval () const
	Return the double click interval (in seconds). More...

Protected Member Functions
virtual void	keyPressed (const WCPositionEvent &)
	Functions called by the base class event handling operators–and normally only those. More...

virtual void	moved (const WCMotionEvent &, const viewer::region::region_list_type &)

virtual void	keyReleased (const WCPositionEvent &)

virtual void	otherKeyPressed (const WCPositionEvent &)

virtual void	draw (const WCRefreshEvent &, const viewer::region::region_list_type &)
	draw the polygon (if any) on the object's currently active WC. More...

virtual void	doubleInside ()
	Output callback functions–to be overridden in derived class as needed. More...

virtual void	doubleOutside ()

virtual void	polygonReady ()
	casacore::Function called when a polygon is ready and not being edited. More...

virtual void	get (casacore::Vector< casacore::Int > &x, casacore::Vector< casacore::Int > &y) const
	Retrieve polygon vertices, or a single vertex, in screen pixels. More...

virtual void	get (casacore::Int &x, casacore::Int &y, const casacore::Int pt) const

Protected Member Functions inherited from casa::MultiWCTool
virtual void	otherKeyReleased (const WCPositionEvent &)

virtual void	updateRegion ()

virtual void	clicked (casacore::Int, casacore::Int)

virtual void	doubleClicked (casacore::Int, casacore::Int)

virtual void	refresh ()
	Copy back-to-front buffer (erasing all MWCTool drawings), then cause this (and all MWCTools on current WC's PC) to draw (or not draw) themselves, according to their current state. More...

virtual void	setClipToDrawArea ()
	Cause subsequent drawing commands to be clipped to the current WC (or its drawing area). More...

virtual void	setClipToWC ()

virtual void	resetClip ()

Protected Member Functions inherited from casa::DisplayTool
	DisplayTool (const Display::KeySym &keysym=Display::K_Pointer_Button1)
	Constructor taking a key to which this tool will initially be attached, typically one of the pointer buttons. More...

	DisplayTool (const DisplayTool &other)
	Copy constructor - construct a new DisplayTool from `other`, using copy semantics. More...

DisplayTool &	operator= (const DisplayTool &other)
	Copy assignment using copy semantics. More...

Display::KeyModifier	keyModifiers ()
	Return the modifier mask. More...

Protected Member Functions inherited from casa::DTVisible
	DTVisible (const DTVisible &other)
	(Required) copy constructor. More...

DTVisible &	operator= (const DTVisible &other)
	(Required) copy assignment. More...

Private Types
enum	AdjustMode { Off, Def, Ready, Move, Resize }
	state of the polygon tool More...

Private Member Functions
virtual void	set (const casacore::Vector< casacore::Int > &x, const casacore::Vector< casacore::Int > &y)
	Set the polygon vertices. More...

virtual void	set (const casacore::Int x, const casacore::Int y, const casacore::Int pt)
	replace a single vertex. More...

void	pushPoint (casacore::Int x1, casacore::Int y1)
	push/pop last vertex More...

void	popPoint ()

casacore::Bool	inPolygon (const casacore::Int &x, const casacore::Int &y) const
	are we inside the polygon? More...

casacore::Bool	inHandle (const casacore::Int &pt, const casacore::Int &x, const casacore::Int &y) const
	are we within the specified handle? More...

Private Attributes
casacore::Bool	itsPolygonPersistent
	should the polygon remain on screen after double clicks? More...

MWCPolyTool::AdjustMode	itsMode

casacore::Bool	itsEmitted
	set true on double-click, if the polygon is persistent. More...

casacore::Int	itsNPoints
	Number of points. More...

casacore::Vector < casacore::Double >	itsX
	Polygon points (linear). More...

casacore::Vector < casacore::Double >	itsY

casacore::Int	itsHandleSize
	size in pixels of the handles More...

casacore::Int	itsSelectedHandle
	vertex being moved More...

casacore::Int	itsBaseMoveX
	position that move started from More...

casacore::Int	itsBaseMoveY

casacore::Double	itsLastPressTime
	times of the last two presses More...

casacore::Double	its2ndLastPressTime

Additional Inherited Members
Protected Attributes inherited from casa::MultiWCTool
WorldCanvas *	itsCurrentWC
	WC being (or to be) drawn on (may be 0 initially). More...

Detailed Description

Base class for WorldCanvas event-based polygon tools.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

<prerequisites> (see ())WCTool </prerequisites>

Etymology

MWCPolyTool stands for Multi-WorldCanvas Polygon Tool

Synopsis

This class adds to its base MWCTool to provide a tool for drawing, reshaping and moving polygons on a WorldCanvas. While MWCPolyTool is not abstract, it performs no useful function. The programmer should derive from this class and override the functions doubleInside and doubleOutside at the very least. These are called when the user double-clicks a particular key or mouse button inside or outside an existing polygon respectively. It is up to the programmer to decide what these events mean, but it is recommended that an internal double- click correspond to the main action of the tool, eg. emitting the polygon vertices to the application, and that an external double-click correspond to a secondary action of the tool, if indeed there are additional actions suitable to the tool.

The polygon is drawn by clicking at each of the vertices, and clicking again on the last or first vertex to complete the polygon. Once drawn, the vertices can be moved by dragging their handles, and the entire polygon relocated by dragging inside the polygon. The polygon is removed from the display when the Esc key is pressed.

Example

Motivation

Many activities on the WorldCanvas will be based on the user drawing a polygon and using the polygon in some operation.

To Do

Add time constraint to double click detection

Definition at line 88 of file MWCPolyTool.h.

Member Enumeration Documentation

enum casa::MWCPolyTool::AdjustMode

private

state of the polygon tool

Enumerator
Off
Def
Ready
Move
Resize

Definition at line 176 of file MWCPolyTool.h.

Constructor & Destructor Documentation

casa::MWCPolyTool::MWCPolyTool	(	Display::KeySym	keysym = `Display::K_Pointer_Button1`,
		const casacore::Bool	persistent = `false`
	)

Constructor.

virtual casa::MWCPolyTool::~MWCPolyTool ( )

virtual

Destructor.

Member Function Documentation

virtual void casa::MWCPolyTool::disable ( )

virtual

Switch the tool off - this calls the base class disable, and then erases the polygon if it's around.

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCPolyTool::doubleInside ( )

inlineprotectedvirtual

Output callback functions–to be overridden in derived class as needed.

Called when there is a double click inside/outside the polygon

Reimplemented in casa::MWCPTRegion.

Definition at line 135 of file MWCPolyTool.h.

virtual void casa::MWCPolyTool::doubleOutside ( )

inlineprotectedvirtual

Definition at line 136 of file MWCPolyTool.h.

virtual void casa::MWCPolyTool::draw	(	const WCRefreshEvent &	,
		const viewer::region::region_list_type &
	)

protectedvirtual

draw the polygon (if any) on the object's currently active WC.

Only to be called by the base class refresh event handler. Derived objects should use refresh() if they need to redraw, but even that is normally handled automatically by this class.

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCPolyTool::get	(	casacore::Vector< casacore::Int > &	x,
		casacore::Vector< casacore::Int > &	y
	)		const

protectedvirtual

Retrieve polygon vertices, or a single vertex, in screen pixels.

Valid results during the callback functions; to be used by them, as well as internally.

virtual void casa::MWCPolyTool::get	(	casacore::Int &	x,
		casacore::Int &	y,
		const casacore::Int	pt
	)		const

protectedvirtual

casacore::Bool casa::MWCPolyTool::inHandle	(	const casacore::Int &	pt,
		const casacore::Int &	x,
		const casacore::Int &	y
	)		const

private

are we within the specified handle?

casacore::Bool casa::MWCPolyTool::inPolygon	(	const casacore::Int &	x,
		const casacore::Int &	y
	)		const

private

are we inside the polygon?

virtual void casa::MWCPolyTool::keyPressed ( const WCPositionEvent & )

protectedvirtual

Functions called by the base class event handling operators–and normally only those.

This is the input that controls the polygon's appearance and action. When the polygon is ready and double-click is received, the doubleInside/Outside routine is invoked.

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCPolyTool::keyReleased ( const WCPositionEvent & )

protectedvirtual

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCPolyTool::moved	(	const WCMotionEvent &	,
		const viewer::region::region_list_type &
	)

protectedvirtual

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCPolyTool::otherKeyPressed ( const WCPositionEvent & )

protectedvirtual

Reimplemented from casa::MultiWCTool.

virtual casacore::Bool casa::MWCPolyTool::polygonDefined ( )

inlinevirtual

Is a polygon currently defined?

Definition at line 109 of file MWCPolyTool.h.

References itsMode, and Ready.

virtual void casa::MWCPolyTool::polygonReady ( )

inlineprotectedvirtual

casacore::Function called when a polygon is ready and not being edited.

(Unused so far on the glish level (12/01)).

Reimplemented in casa::QtOldPTRegion.

Definition at line 141 of file MWCPolyTool.h.

void casa::MWCPolyTool::popPoint ( )

private

void casa::MWCPolyTool::pushPoint	(	casacore::Int	x1,
		casacore::Int	y1
	)

private

push/pop last vertex

virtual void casa::MWCPolyTool::reset ( casacore::Bool skipRefresh = false )

virtual

reset to non-existent, non-active polygon.

Refreshes if necessary to erase (unless skipRefresh==true). (Does not unregister from WCs or disable future event handling).

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCPolyTool::set	(	const casacore::Vector< casacore::Int > &	x,
		const casacore::Vector< casacore::Int > &	y
	)

privatevirtual

Set the polygon vertices.

itsNPoints should already be set, and x and y must contain (at least) this many points.

virtual void casa::MWCPolyTool::set	(	const casacore::Int	x,
		const casacore::Int	y,
		const casacore::Int	pt
	)

privatevirtual

replace a single vertex.

Member Data Documentation

casacore::Double casa::MWCPolyTool::its2ndLastPressTime

private

Definition at line 209 of file MWCPolyTool.h.

casacore::Int casa::MWCPolyTool::itsBaseMoveX

private

position that move started from

Definition at line 206 of file MWCPolyTool.h.

casacore::Int casa::MWCPolyTool::itsBaseMoveY

private

Definition at line 206 of file MWCPolyTool.h.

casacore::Bool casa::MWCPolyTool::itsEmitted

private

set true on double-click, if the polygon is persistent.

set false when the polygon is moved, resized or reset. If true, a click outside the polygon will erase it and begin definition of a new one.

Definition at line 189 of file MWCPolyTool.h.

casacore::Int casa::MWCPolyTool::itsHandleSize

private

size in pixels of the handles

Definition at line 200 of file MWCPolyTool.h.

casacore::Double casa::MWCPolyTool::itsLastPressTime

private

times of the last two presses

Definition at line 209 of file MWCPolyTool.h.

MWCPolyTool::AdjustMode casa::MWCPolyTool::itsMode

private

Definition at line 183 of file MWCPolyTool.h.

Referenced by polygonDefined().

casacore::Int casa::MWCPolyTool::itsNPoints

private

Number of points.

Definition at line 192 of file MWCPolyTool.h.

casacore::Bool casa::MWCPolyTool::itsPolygonPersistent

private

should the polygon remain on screen after double clicks?

Definition at line 173 of file MWCPolyTool.h.

casacore::Int casa::MWCPolyTool::itsSelectedHandle

private

vertex being moved

Definition at line 203 of file MWCPolyTool.h.

casacore::Vector<casacore::Double> casa::MWCPolyTool::itsX

private

Polygon points (linear).

Not to be used directly. use get, set, push, pop instead, which take pixel coordinate arguments. It's done this way so that zooms work on the figures.

Definition at line 197 of file MWCPolyTool.h.

casacore::Vector<casacore::Double> casa::MWCPolyTool::itsY

private

Definition at line 197 of file MWCPolyTool.h.

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

casa/code/display/DisplayEvents/MWCPolyTool.h

Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Intended use:

Review Status

Etymology

Synopsis

Example

Motivation

To Do

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation