public class CoolItem extends Item
CoolBar
.
IMPORTANT: This class is not intended to be subclassed.
Constructor and Description |
---|
CoolItem(CoolBar parent,
int style)
Constructs a new instance of this class given its parent (which must be a
CoolBar ) and a style value describing its behavior and
appearance. |
CoolItem(CoolBar parent,
int style,
int index)
Constructs a new instance of this class given its parent (which must be a
CoolBar ), a style value describing its behavior and
appearance, and the index at which to place it in the items maintained by
its parent. |
Modifier and Type | Method and Description |
---|---|
void |
addSelectionListener(SelectionListener listener)
Adds the listener to the collection of listeners that will be notified when
the control is selected by the user, by sending it one of the messages
defined in the
SelectionListener interface. |
protected void |
checkSubclass()
Checks that this class can be subclassed.
|
Point |
computeSize(int wHint,
int hHint)
Returns the preferred size of the receiver.
|
void |
dispose()
Disposes of the operating system resources associated with
the receiver and all its descendents.
|
<T> T |
getAdapter(java.lang.Class<T> adapter)
Implementation of the
Adaptable interface. |
Rectangle |
getBounds()
Returns a rectangle describing the receiver's size and location relative to
its parent.
|
Control |
getControl()
Returns the control that is associated with the receiver.
|
Point |
getMinimumSize()
Returns the minimum size that the cool item can be resized to using the
cool item's gripper.
|
CoolBar |
getParent()
Returns the receiver's parent, which must be a
CoolBar . |
Point |
getPreferredSize()
Returns a point describing the receiver's ideal size.
|
Point |
getSize()
Returns a point describing the receiver's size.
|
void |
removeSelectionListener(SelectionListener listener)
Removes the listener from the collection of listeners that will be notified
when the control is selected by the user.
|
void |
setControl(Control control)
Sets the control that is associated with the receiver to the argument.
|
void |
setMinimumSize(int width,
int height)
Sets the minimum size that the cool item can be resized to using the cool
item's gripper, to the point specified by the arguments.
|
void |
setMinimumSize(Point size)
Sets the minimum size that the cool item can be resized to using the cool
item's gripper, to the point specified by the argument.
|
void |
setPreferredSize(int width,
int height)
Sets the receiver's ideal size to the point specified by the arguments.
|
void |
setPreferredSize(Point size)
Sets the receiver's ideal size to the point specified by the argument.
|
void |
setSize(int width,
int height)
Sets the receiver's size to the point specified by the arguments.
|
void |
setSize(Point size)
Sets the receiver's size to the point specified by the argument.
|
addDisposeListener, addListener, checkWidget, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, reskin, setData, setData, toString
public CoolItem(CoolBar parent, int style)
CoolBar
) and a style value describing its behavior and
appearance. The item is added to the end of the items maintained by its
parent.
The style value is either one of the style constants defined in class
SWT
which is applicable to instances of this class, or must
be built by bitwise OR'ing together (that is, using the
int
"|" operator) two or more of those SWT
style constants. The class description lists the style constants that are
applicable to the class. Style bits are also inherited from superclasses.
parent
- a composite control which will be the parent of the new instance
(cannot be null)style
- the style of control to constructjava.lang.IllegalArgumentException
- SWTException
- SWT.DROP_DOWN
,
Widget.checkSubclass()
,
Widget.getStyle()
public CoolItem(CoolBar parent, int style, int index)
CoolBar
), a style value describing its behavior and
appearance, and the index at which to place it in the items maintained by
its parent.
The style value is either one of the style constants defined in class
SWT
which is applicable to instances of this class, or must
be built by bitwise OR'ing together (that is, using the
int
"|" operator) two or more of those SWT
style constants. The class description lists the style constants that are
applicable to the class. Style bits are also inherited from superclasses.
parent
- a composite control which will be the parent of the new instance
(cannot be null)style
- the style of control to constructindex
- the zero-relative index at which to store the receiver in its
parentjava.lang.IllegalArgumentException
- SWTException
- SWT.DROP_DOWN
,
Widget.checkSubclass()
,
Widget.getStyle()
public void addSelectionListener(SelectionListener listener)
SelectionListener
interface.
If widgetSelected
is called when the mouse is over the
drop-down arrow (or 'chevron') portion of the cool item, the event object
detail field contains the value SWT.ARROW
, and the x and y
fields in the event object represent the point at the bottom left of the
chevron, where the menu should be popped up.
widgetDefaultSelected
is not called.
listener
- the listener which should be notified when the control is selected
by the userjava.lang.IllegalArgumentException
- SWTException
- SelectionListener
,
removeSelectionListener(org.eclipse.swt.events.SelectionListener)
,
SelectionEvent
protected void checkSubclass()
Widget
The SWT class library is intended to be subclassed
only at specific, controlled points (most notably,
Composite
and Canvas
when
implementing new widgets). This method enforces this
rule unless it is overridden.
IMPORTANT: By providing an implementation of this method that allows a subclass of a class which does not normally allow subclassing to be created, the implementer agrees to be fully responsible for the fact that any such subclass will likely fail between SWT releases and will be strongly platform specific. No support is provided for user-written classes which are implemented in this fashion.
The ability to subclass outside of the allowed SWT classes is intended purely to enable those not on the SWT development team to implement patches in order to get around specific limitations in advance of when those limitations can be addressed by the team. Subclassing should not be attempted without an intimate and detailed understanding of the hierarchy.
checkSubclass
in class Widget
public Point computeSize(int wHint, int hHint)
The preferred size of a CoolItem
is the size that
it would best be displayed at. The width hint and height hint arguments
allow the caller to ask the instance questions such as "Given a particular
width, how high does it need to be to show all of the contents?" To
indicate that the caller does not wish to constrain a particular dimension,
the constant SWT.DEFAULT
is passed for the hint.
wHint
- the width hint (can be SWT.DEFAULT
)hHint
- the height hint (can be SWT.DEFAULT
)SWTException
- Layout
,
getBounds()
,
getSize()
,
Control.getBorderWidth()
,
Scrollable.computeTrim(int, int, int, int)
,
Scrollable.getClientArea()
public void dispose()
Widget
true
when sent the message isDisposed()
.
Any internal connections between the widgets in the tree will
have been removed to facilitate garbage collection.
NOTE: This method is not called recursively on the descendents
of the receiver. This means that, widget implementers can not
detect when a widget is being disposed of by re-implementing
this method, but should instead listen for the Dispose
event.
public Rectangle getBounds()
SWTException
- public Control getControl()
SWTException
- public Point getMinimumSize()
SWTException
- public CoolBar getParent()
CoolBar
.SWTException
- public Point getPreferredSize()
SWTException
- public Point getSize()
SWTException
- public void removeSelectionListener(SelectionListener listener)
listener
- the listener which should no longer be notifiedjava.lang.IllegalArgumentException
- SWTException
- SelectionListener
,
addSelectionListener(org.eclipse.swt.events.SelectionListener)
public void setControl(Control control)
control
- the new control that will be contained by the receiverjava.lang.IllegalArgumentException
- SWTException
- public void setMinimumSize(int width, int height)
width
- the minimum width of the cool item, in pixelsheight
- the minimum height of the cool item, in pixelsSWTException
- public void setMinimumSize(Point size)
size
- a point representing the minimum width and height of the cool
item, in pixelsjava.lang.IllegalArgumentException
- SWTException
- public void setPreferredSize(int width, int height)
width
- the new ideal width for the receiverheight
- the new ideal height for the receiverSWTException
- public void setPreferredSize(Point size)
size
- the new ideal size for the receiverjava.lang.IllegalArgumentException
- SWTException
- public void setSize(int width, int height)
Note: Attempting to set the width or height of the receiver to a negative number will cause that value to be set to zero instead.
width
- the new width for the receiverheight
- the new height for the receiverSWTException
- public void setSize(Point size)
Note: Attempting to set the width or height of the receiver to a negative number will cause them to be set to zero instead.
size
- the new size for the receiverjava.lang.IllegalArgumentException
- SWTException
- public <T> T getAdapter(java.lang.Class<T> adapter)
Widget
Adaptable
interface.
IMPORTANT: This method is not part of the RWT public API. It is marked public only so that it can be shared within the packages provided by RWT. It should never be accessed from application code.
getAdapter
in interface Adaptable
getAdapter
in class Widget
adapter
- the lookup classnull
if
there is no adapter associated with the given class.
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All rights reserved. This program and the accompanying materials
are made available under the terms of the
Eclipse Public License v1.0