swarm.gui
Class CanvasImpl

java.lang.Object
  |
  +--swarm.BaseImpl
        |
        +--swarm.gui.CanvasImpl

public class CanvasImpl

extends BaseImpl

implements ArchivedGeometryWidget, ArchivedGeometryWidgetS, CanvasS, Canvas

An interface to Tk canvas semantics.. The Canvas widget allows display of a diverse range of graphical objects.

Constructor Summary

CanvasImpl()

CanvasImpl(Zone aZone)
The create: message creates a new instance of a type with default options.

CanvasImpl(Zone aZone, java.lang.String name)

Methods implemented by this class for interface swarm.gui.ArchivedGeometryWidget

updateArchiver

Methods implemented by this class for interface swarm.gui.Canvas

addWidget$X$Y$centerFlag, checkGeometry, removeWidget

Methods implemented by this class for interface swarm.gui.Widget

disableDestroyNotification, enableDestroyNotification$notificationMethod, getDestroyedFlag, getHeight, getParent, getTopLevel, getWidgetName, getWidth, getWindowGeometry, getX, getY, pack, packBeforeAndFillLeft$expand, packFill, packFillLeft, packForgetAndExpand, packToRight, setActiveFlag, setHeight, setWidth, setWidth$Height, setWindowGeometry, setWindowTitle, setX$Y

Methods implemented by this class for interface swarm.defobj.Drop

drop

Methods implemented by this class for interface swarm.defobj.DefinedObject

compare, describe, describeID, getDisplayName, getTypeName, getZone, perform, perform$with, perform$with$with, perform$with$with$with, respondsTo, setDisplayName, xfprint, xfprintid, xprint, xprintid

Methods implemented by this class for interface swarm.defobj.GetName

getName

Methods inherited from class java.lang.Object

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

Constructor Detail

CanvasImpl

public CanvasImpl()

CanvasImpl

public CanvasImpl(Zone aZone,
                  java.lang.String name)

CanvasImpl

public CanvasImpl(Zone aZone)

The create: message creates a new instance of a type with default options. The zone argument specifies the source of storage for the new object. The receiving object of this message is a previously defined type object. The message is declared as a class message (with a + declaration tag) to indicate that the message is accepted only by the type object itself rather than an already created instance of the type (which a - declaration tag otherwise defines). The create: message returns the new object just created. This object is an instance of some class selected to implement the type. The class which a type selects to implement an object may be obtained by the getClass message, but is not otherwise visible to the calling program. A caller never refers to any class name when creating objects using these messages, only to type names, which are automatically published as global constants from any @protocol declaration.