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java.lang.Objectorg.eclipse.swt.widgets.Widget
org.eclipse.swt.widgets.Item
org.eclipse.swt.widgets.ExpandItem
public class ExpandItem
Instances of this class represent a selectable user interface object that represents a expandable item in a expand bar.
IMPORTANT: This class is not intended to be subclassed.
ExpandBar
,
Sample code and further informationField Summary |
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Fields inherited from class org.eclipse.swt.widgets.Widget |
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handle |
Constructor Summary | |
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ExpandItem(ExpandBar parent,
int style)
Constructs a new instance of this class given its parent and a style value describing its behavior and appearance. |
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ExpandItem(ExpandBar parent,
int style,
int index)
Constructs a new instance of this class given its parent, a style value describing its behavior and appearance, and the index at which to place it in the items maintained by its parent. |
Method Summary | |
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protected void |
checkSubclass()
Checks that this class can be subclassed. |
Control |
getControl()
Returns the control that is shown when the item is expanded. |
boolean |
getExpanded()
Returns true if the receiver is expanded,
and false otherwise. |
int |
getHeaderHeight()
Returns the height of the receiver's header |
int |
getHeight()
Gets the height of the receiver. |
ExpandBar |
getParent()
Returns the receiver's parent, which must be a ExpandBar . |
void |
setControl(Control control)
Sets the control that is shown when the item is expanded. |
void |
setExpanded(boolean expanded)
Sets the expanded state of the receiver. |
void |
setHeight(int height)
Sets the height of the receiver. |
void |
setImage(Image image)
Sets the receiver's image to the argument, which may be null indicating that no image should be displayed. |
void |
setText(java.lang.String string)
Sets the receiver's text. |
Methods inherited from class org.eclipse.swt.widgets.Item |
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getImage, getText |
Methods inherited from class org.eclipse.swt.widgets.Widget |
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addDisposeListener, addListener, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, setData, setData, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ExpandItem(ExpandBar parent, int style)
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 construct
java.lang.IllegalArgumentException
- SWTException
- Widget.checkSubclass()
,
Widget.getStyle()
public ExpandItem(ExpandBar parent, int style, int index)
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 to store the receiver in its parent
java.lang.IllegalArgumentException
- SWTException
- Widget.checkSubclass()
,
Widget.getStyle()
Method Detail |
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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 Item
public Control getControl()
null
.
SWTException
- public boolean getExpanded()
true
if the receiver is expanded,
and false otherwise.
SWTException
- public int getHeaderHeight()
SWTException
- public int getHeight()
SWTException
- public ExpandBar getParent()
ExpandBar
.
SWTException
- public void setControl(Control control)
control
- the new control (or null)
java.lang.IllegalArgumentException
- SWTException
- public void setExpanded(boolean expanded)
expanded
- the new expanded state
SWTException
- public void setHeight(int height)
height
- the new height
SWTException
- public void setImage(Image image)
Item
setImage
in class Item
image
- the image to display on the receiver (may be null)public void setText(java.lang.String string)
Item
setText
in class Item
string
- the new text
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