Base class for MultiWorldCanvas event-based rectangle tools. More...

#include <MultiPVTool.h>

Inheritance diagram for casa::MultiPVTool:

Public Member Functions
	MultiPVTool (viewer::RegionSourceFactory rsf, PanelDisplay pd, Display::KeySym keysym=Display::K_Pointer_Button1, const Bool persistent=False)
	Constructor.
virtual	~MultiPVTool ()
	Destructor.
virtual void	disable ()
	Switch the tool off - this erases the rectangle, if any, and calls the base class disable.
virtual void	reset (Bool skipRefresh=False)
	reset to non-existent, non-active rectangle.
virtual Bool	rectangleDefined ()
	Is a rectangle currently defined?
viewer::RegionSource *	getRegionSource ()
void	checkPoint (WorldCanvas *wc, State &state)
	this is a non-const function because a non-const RegionTool ptr is returned in 'state' which can then be used for setting the state of the regions managed by the various tools....
void	revokeRegion (viewer::Region *)
	called when the user (read GUI user) indicates that a region should be deleted...
const std::set < viewer::region::RegionTypes > &	regionsCreated () const
	returns a set which indicates regions this creator creates...
bool	create (viewer::region::RegionTypes, WorldCanvas , const std::vector< std::pair< double, double > > &, const std::string &, viewer::region::TextPosition, const std::vector< int > &, const std::string &, int, int, const std::string &, const std::string &, viewer::region::LineStyle, unsigned int, bool, VOID )
	create regions of various types (e.g.
RegionToolTypes	type () const
Protected Member Functions
virtual void	keyPressed (const WCPositionEvent &ev)
	Functions called by the base class event handling operators--and normally only those.
virtual void	keyReleased (const WCPositionEvent &ev)
virtual void	otherKeyPressed (const WCPositionEvent &ev)
virtual void	moved (const WCMotionEvent &ev, const viewer::region::region_list_type &)
virtual void	draw (const WCRefreshEvent &, const viewer::region::region_list_type &)
	draw the rectangle (if any) on the object's currently active WC.
virtual void	doubleInside ()
	Output callback functions--to be overridden in derived class.
virtual void	doubleOutside ()
virtual void	rectangleReady ()
	Called when a rectangle is ready and not being edited.
virtual void	get (Int &x1, Int &y1, Int &x2, Int &y2) const
	Retrieve the rectangle coordinates, in screen pixels.
virtual bool	checkType (viewer::region::RegionTypes t)
virtual std::tr1::shared_ptr < viewer::PVLine >	allocate_region (WorldCanvas wc, double x1, double y1, double x2, double y2, VOID region_specific_state) const
Protected Attributes
viewer::RegionSource *	rfactory
Private Types
typedef std::list < std::tr1::shared_ptr < viewer::PVLine > >	pvlinelist
Private Member Functions
void	update_stats (const WCMotionEvent &ev)
void	start_new_rectangle (WorldCanvas *, int x, int y)
virtual void	set (const Int &x1, const Int &y1, const Int &x2, const Int &y2)
	set the pixel coordinates of the rectangle
virtual void	get (Int &x1, Int &y1) const
	get only the anchor point
Private Attributes
Bool	itsPVLineExists
	do we have a rectangle yet? (if True, itsCurrentWC, itsEmitted, P1, and P2 are valid)
Bool	itsActive
	was the button pressed in the rectangle (or, if none, in an active WC) and not yet released/reset?
std::tr1::shared_ptr < viewer::PVLine >	resizing_region
	itsActive is being replaced by resizing_region
std::tr1::shared_ptr < viewer::PVLine >	creating_region
int	resizing_region_handle
Bool	itsMoving
	(valid only if itsActive==True): True = being moved False = being resized
pvlinelist	moving_regions
	itsMoving is being replaced by moving_regions
double	moving_linx_
double	moving_liny_
Bool	itsEmitted
	(valid only if itsPVLineExists==True) Has doubleInside/Outside been called for this rectangle? If so, a key press outside the rectangle will start a new rectangle, as if itsPVLineExists were False.
Vector< Double >	itsP1
	(Linear) coordinates of the rectangle (invariant over zooms, but not coordinate system changes.
Vector< Double >	itsP2
Vector< Int >	itsHX
	storage of the handle (pixel) coordinates
Vector< Int >	itsHY
Int	itsBaseMoveX
	position that move started from
Int	itsBaseMoveY
Double	itsLastPressTime
	store the times of the last two presses here:
Double	its2ndLastPressTime
pvlinelist	rectangles
PanelDisplay *	pd_

Detailed Description

Base class for MultiWorldCanvas event-based rectangle tools.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

<prerequisites> WCTool </prerequisites>

Etymology

MultiPVTool stands for MultiWorldCanvas PVLine Tool

Synopsis

This class adds to its base WCTool to provide a tool for drawing, resizing and moving rectangles on a WorldCanvas. While MultiPVTool is not abstract, it performs no useful function. The programmer should derive from this class, and implement the functions doubleInside and doubleOutside, which are called when the user double-clicks the key or mouse button inside or outside an existing rectangle respectively. It is up to the programmer to decide what double clicks inside and outside the rectangle correspond to, although it is recommended that a double click inside correspond to the main action of the tool, and a double click outside correspond to a secondary action of the tool, if indeed a secondary action exists.

The rectangle is drawn by dragging the mouse from one corner to the diagonally opposite corner. Once constructed, the rectangle can be resized by dragging its corners, or relocated by dragging inside the rectangle. The rectangle 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 rectangle, and then proceeding to some action with that rectangle. A nice example is zooming.

Definition at line 92 of file MultiPVTool.h.

Member Typedef Documentation

typedef std::list<std::tr1::shared_ptr<viewer::PVLine> > casa::MultiPVTool::pvlinelist [private]

Definition at line 177 of file MultiPVTool.h.

Constructor & Destructor Documentation

casa::MultiPVTool::MultiPVTool	(	viewer::RegionSourceFactory *	rsf,
		PanelDisplay *	pd,
		Display::KeySym	keysym = `Display::K_Pointer_Button1`,
		const Bool	persistent = `False`
	)

Constructor.

virtual casa::MultiPVTool::~MultiPVTool ( ) [virtual]

Destructor.

Member Function Documentation

virtual std::tr1::shared_ptr<viewer::PVLine> casa::MultiPVTool::allocate_region	(	WorldCanvas *	wc,
		double	x1,
		double	y1,
		double	x2,
		double	y2,
		VOID *	region_specific_state
	)		const `[protected, virtual]`

void casa::MultiPVTool::checkPoint	(	WorldCanvas *	wc,
		State &	state
	)		`[virtual]`

this is a non-const function because a non-const RegionTool ptr is returned in 'state' which can then be used for setting the state of the regions managed by the various tools....

Implements casa::RegionTool.

virtual bool casa::MultiPVTool::checkType ( viewer::region::RegionTypes t ) [inline, protected, virtual]

Definition at line 170 of file MultiPVTool.h.

References casa::viewer::region::PVLineRegion.

bool casa::MultiPVTool::create	(	viewer::region::RegionTypes	,
		WorldCanvas *	,
		const std::vector< std::pair< double, double > > &	,
		const std::string &	,
		viewer::region::TextPosition	,
		const std::vector< int > &	,
		const std::string &	,
		int	,
		int	,
		const std::string &	,
		const std::string &	,
		viewer::region::LineStyle	,
		unsigned	int,
		bool	,
		VOID *
	)		`[virtual]`

create regions of various types (e.g.

point, rect, poly, etc.). For use when loading casa region files...

Implements casa::RegionTool.

virtual void casa::MultiPVTool::disable ( ) [virtual]

Switch the tool off - this erases the rectangle, if any, and calls the base class disable.

Reimplemented from casa::RegionTool.

virtual void casa::MultiPVTool::doubleInside ( ) [inline, protected, virtual]

Output callback functions--to be overridden in derived class.

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

Reimplemented in casa::MultiPVToolImpl.

Definition at line 156 of file MultiPVTool.h.

virtual void casa::MultiPVTool::doubleOutside ( ) [inline, protected, virtual]

Definition at line 157 of file MultiPVTool.h.

virtual void casa::MultiPVTool::draw	(	const WCRefreshEvent &	,
		const viewer::region::region_list_type &
	)		`[protected, virtual]`

draw the rectangle (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.

Reimplemented from casa::RegionTool.

virtual void casa::MultiPVTool::get	(	Int &	x1,
		Int &	y1,
		Int &	x2,
		Int &	y2
	)		const `[protected, virtual]`

Retrieve the rectangle coordinates, in screen pixels.

Anchor (if applicable) is (x1,y1). Valid during the output callbacks; to be used by them, as well as internally.

virtual void casa::MultiPVTool::get	(	Int &	x1,
		Int &	y1
	)		const `[private, virtual]`

get only the anchor point

viewer::RegionSource* casa::MultiPVTool::getRegionSource ( ) [inline]

Definition at line 116 of file MultiPVTool.h.

References rfactory.

virtual void casa::MultiPVTool::keyPressed ( const WCPositionEvent & ev ) [protected, virtual]

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

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

Reimplemented from casa::RegionTool.

virtual void casa::MultiPVTool::keyReleased ( const WCPositionEvent & ev ) [protected, virtual]

Reimplemented from casa::RegionTool.

virtual void casa::MultiPVTool::moved	(	const WCMotionEvent &	ev,
		const viewer::region::region_list_type &
	)		`[protected, virtual]`

Reimplemented from casa::RegionTool.

virtual void casa::MultiPVTool::otherKeyPressed ( const WCPositionEvent & ev ) [protected, virtual]

Reimplemented from casa::RegionTool.

virtual Bool casa::MultiPVTool::rectangleDefined ( ) [inline, virtual]

Is a rectangle currently defined?

Definition at line 114 of file MultiPVTool.h.

References itsPVLineExists.

virtual void casa::MultiPVTool::rectangleReady ( ) [inline, protected, virtual]

Called when a rectangle is ready and not being edited.

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

Definition at line 162 of file MultiPVTool.h.

const std::set<viewer::region::RegionTypes>& casa::MultiPVTool::regionsCreated ( ) const [virtual]

returns a set which indicates regions this creator creates...

Implements casa::viewer::RegionCreator.

virtual void casa::MultiPVTool::reset ( Bool skipRefresh = False ) [virtual]

reset to non-existent, non-active rectangle.

Refreshes if necessary to erase (unless skipRefresh==True In that case, the caller should do the refresh itself). (Does not unregister from WCs or disable future event handling).

Reimplemented from casa::MultiWCTool.

void casa::MultiPVTool::revokeRegion ( viewer::Region * ) [virtual]

called when the user (read GUI user) indicates that a region should be deleted...

Implements casa::RegionTool.

virtual void casa::MultiPVTool::set	(	const Int &	x1,
		const Int &	y1,
		const Int &	x2,
		const Int &	y2
	)		`[private, virtual]`

set the pixel coordinates of the rectangle

void casa::MultiPVTool::start_new_rectangle	(	WorldCanvas *	,
		int	x,
		int	y
	)		`[private]`

RegionToolTypes casa::MultiPVTool::type ( ) const [inline, virtual]

Implements casa::RegionTool.

Definition at line 132 of file MultiPVTool.h.

References casa::RegionTool::PVLINETOOL.

void casa::MultiPVTool::update_stats ( const WCMotionEvent & ev ) [private]

Member Data Documentation

std::tr1::shared_ptr<viewer::PVLine> casa::MultiPVTool::creating_region [private]

Definition at line 196 of file MultiPVTool.h.

Double casa::MultiPVTool::its2ndLastPressTime [private]

Definition at line 228 of file MultiPVTool.h.

Bool casa::MultiPVTool::itsActive [private]

was the button pressed in the rectangle (or, if none, in an active WC) and not yet released/reset?

Definition at line 193 of file MultiPVTool.h.

Int casa::MultiPVTool::itsBaseMoveX [private]

position that move started from

Definition at line 225 of file MultiPVTool.h.

Int casa::MultiPVTool::itsBaseMoveY [private]

Definition at line 225 of file MultiPVTool.h.

Bool casa::MultiPVTool::itsEmitted [private]

(valid only if itsPVLineExists==True) Has doubleInside/Outside been called for this rectangle? If so, a key press outside the rectangle will start a new rectangle, as if itsPVLineExists were False.

However, a key press inside the rectangle will reset itsEmitted to False, allowing the rectangle to be reused (possibly moved or resized, and emitted again).

Definition at line 214 of file MultiPVTool.h.

Vector<Int> casa::MultiPVTool::itsHX [private]

storage of the handle (pixel) coordinates

Definition at line 222 of file MultiPVTool.h.

Vector<Int> casa::MultiPVTool::itsHY [private]

Definition at line 222 of file MultiPVTool.h.

Double casa::MultiPVTool::itsLastPressTime [private]

store the times of the last two presses here:

Definition at line 228 of file MultiPVTool.h.

Bool casa::MultiPVTool::itsMoving [private]

(valid only if itsActive==True): True = being moved False = being resized

Definition at line 201 of file MultiPVTool.h.