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

#include <MWCRectTool.h>

Inheritance diagram for casa::MWCRectTool:

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

virtual	~MWCRectTool ()
	Destructor. More...

virtual void	disable ()
	Switch the tool off - this erases the rectangle, if any, and calls the base class disable. More...

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

virtual casacore::Bool	rectangleDefined ()
	Is a rectangle 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	keyReleased (const WCPositionEvent &)

virtual void	otherKeyPressed (const WCPositionEvent &)

virtual void	moved (const WCMotionEvent &, 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. More...

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

virtual void	doubleOutside ()

virtual void	rectangleReady ()
	Called when a rectangle is ready and not being edited. More...

virtual void	get (casacore::Int &x1, casacore::Int &y1, casacore::Int &x2, casacore::Int &y2) const
	Retrieve the rectangle coordinates, in screen pixels. More...

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 Member Functions
virtual void	set (const casacore::Int &x1, const casacore::Int &y1, const casacore::Int &x2, const casacore::Int &y2)
	set the pixel coordinates of the rectangle More...

virtual void	get (casacore::Int &x1, casacore::Int &y1) const
	get only the anchor point More...

Private Attributes
casacore::Bool	itsRectanglePersistent
	does the rectangle persist after double clicks (until a new one is started)? More...

casacore::Bool	itsRectangleExists
	do we have a rectangle yet? (if true, itsCurrentWC, itsEmitted, P1, and P2 are valid) More...

casacore::Bool	itsActive
	was the button pressed in the rectangle (or, if none, in an active WC) and not yet released/reset? More...

casacore::Bool	itsMoving
	(valid only if itsActive==true): true = being moved false = being resized More...

casacore::Bool	itsEmitted
	(valid only if itsRectangleExists==true) Has doubleInside/Outside been called for this rectangle? If so, a key press outside the rectangle will start a new rectangle, as if itsRectangleExists were false. More...

casacore::Vector < casacore::Double >	itsP1
	(Linear) coordinates of the rectangle (invariant over zooms, but not coordinate system changes. More...

casacore::Vector < casacore::Double >	itsP2

casacore::Vector< casacore::Int >	itsHX
	storage of the handle (pixel) coordinates More...

casacore::Vector< casacore::Int >	itsHY

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

casacore::Int	itsBaseMoveY

casacore::Double	itsLastPressTime
	store the times of the last two presses here: 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 MultiWorldCanvas event-based rectangle tools.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

<prerequisites> WCTool </prerequisites>

Etymology

MWCRectTool stands for MultiWorldCanvas Rectangle Tool

Synopsis

This class adds to its base WCTool to provide a tool for drawing, resizing and moving rectangles on a WorldCanvas. While MWCRectTool 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 84 of file MWCRectTool.h.

Constructor & Destructor Documentation

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

Constructor.

virtual casa::MWCRectTool::~MWCRectTool ( )

virtual

Destructor.

Member Function Documentation

virtual void casa::MWCRectTool::disable ( )

virtual

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

Reimplemented from casa::MultiWCTool.

virtual void casa::MWCRectTool::doubleInside ( )

inlineprotectedvirtual

Output callback functions–to be overridden in derived class.

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

Reimplemented in casa::MWCRTZoomer, and casa::MWCRTRegion.

Definition at line 133 of file MWCRectTool.h.

virtual void casa::MWCRectTool::doubleOutside ( )

inlineprotectedvirtual

Reimplemented in casa::MWCRTZoomer.

Definition at line 134 of file MWCRectTool.h.

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

protectedvirtual

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::MultiWCTool.

virtual void casa::MWCRectTool::get	(	casacore::Int &	x1,
		casacore::Int &	y1,
		casacore::Int &	x2,
		casacore::Int &	y2
	)		const

protectedvirtual

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::MWCRectTool::get	(	casacore::Int &	x1,
		casacore::Int &	y1
	)		const

privatevirtual

get only the anchor point

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

protectedvirtual

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::MultiWCTool.

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

protectedvirtual

Reimplemented from casa::MultiWCTool.

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

protectedvirtual

Reimplemented from casa::MultiWCTool.

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

protectedvirtual

Reimplemented from casa::MultiWCTool.

virtual casacore::Bool casa::MWCRectTool::rectangleDefined ( )

inlinevirtual

Is a rectangle currently defined?

Definition at line 106 of file MWCRectTool.h.

References itsRectangleExists.

virtual void casa::MWCRectTool::rectangleReady ( )

inlineprotectedvirtual

Called when a rectangle is ready and not being edited.

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

Definition at line 139 of file MWCRectTool.h.

virtual void casa::MWCRectTool::reset ( casacore::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.

virtual void casa::MWCRectTool::set	(	const casacore::Int &	x1,
		const casacore::Int &	y1,
		const casacore::Int &	x2,
		const casacore::Int &	y2
	)

privatevirtual

set the pixel coordinates of the rectangle

Member Data Documentation

casacore::Double casa::MWCRectTool::its2ndLastPressTime

private

Definition at line 194 of file MWCRectTool.h.

casacore::Bool casa::MWCRectTool::itsActive

private

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

Definition at line 167 of file MWCRectTool.h.

casacore::Int casa::MWCRectTool::itsBaseMoveX

private

position that move started from

Definition at line 191 of file MWCRectTool.h.

casacore::Int casa::MWCRectTool::itsBaseMoveY

private

Definition at line 191 of file MWCRectTool.h.

casacore::Bool casa::MWCRectTool::itsEmitted

private

(valid only if itsRectangleExists==true) Has doubleInside/Outside been called for this rectangle? If so, a key press outside the rectangle will start a new rectangle, as if itsRectangleExists 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 180 of file MWCRectTool.h.

casacore::Vector<casacore::Int> casa::MWCRectTool::itsHX

private

storage of the handle (pixel) coordinates

Definition at line 188 of file MWCRectTool.h.

casacore::Vector<casacore::Int> casa::MWCRectTool::itsHY

private

Definition at line 188 of file MWCRectTool.h.

casacore::Double casa::MWCRectTool::itsLastPressTime

private

store the times of the last two presses here:

Definition at line 194 of file MWCRectTool.h.

casacore::Bool casa::MWCRectTool::itsMoving

private

(valid only if itsActive==true): true = being moved false = being resized

Definition at line 171 of file MWCRectTool.h.

casacore::Vector<casacore::Double> casa::MWCRectTool::itsP1

private

(Linear) coordinates of the rectangle (invariant over zooms, but not coordinate system changes.

To do: support the WorldCoordinateChange refresh reason, and reset this tool when it occurs).

Definition at line 185 of file MWCRectTool.h.

casacore::Vector<casacore::Double> casa::MWCRectTool::itsP2

private

Definition at line 185 of file MWCRectTool.h.

casacore::Bool casa::MWCRectTool::itsRectangleExists

private

do we have a rectangle yet? (if true, itsCurrentWC, itsEmitted, P1, and P2 are valid)

Definition at line 163 of file MWCRectTool.h.

Referenced by rectangleDefined().

casacore::Bool casa::MWCRectTool::itsRectanglePersistent

private

does the rectangle persist after double clicks (until a new one is started)?

Definition at line 159 of file MWCRectTool.h.

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

casa/code/display/DisplayEvents/MWCRectTool.h

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Intended use:

Review Status

Etymology

Synopsis

Example

Motivation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation