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org.eclipse.swt.widgets
Class TreeItem

java.lang.Object
  extended byorg.eclipse.swt.widgets.Widget
      extended byorg.eclipse.swt.widgets.Item
          extended byorg.eclipse.swt.widgets.TreeItem
public class TreeItem
extends Item

Instances of this class represent a selectable user interface object that represents a hierarchy of tree items in a tree widget.

Styles:
(none)
Events:
(none)

IMPORTANT: This class is not intended to be subclassed.

Constructor Summary
TreeItem(Tree parent, int style)
          Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem) and a style value describing its behavior and appearance.
TreeItem(Tree parent, int style, int index)
          Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem), a style value describing its behavior and appearance, and the index at which to place it in the items maintained by its parent.
TreeItem(TreeItem parentItem, int style)
          Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem) and a style value describing its behavior and appearance.
TreeItem(TreeItem parentItem, int style, int index)
          Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem), 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
 Color getBackground()
          Returns the receiver's background color.
 Rectangle getBounds()
          Returns a rectangle describing the receiver's size and location relative to its parent.
 boolean getChecked()
          Returns true if the receiver is checked, and false otherwise.
 boolean getExpanded()
          Returns true if the receiver is expanded, and false otherwise.
 Font getFont()
          Returns the font that the receiver will use to paint textual information for this item.
 Color getForeground()
          Returns the foreground color that the receiver will use to draw.
 boolean getGrayed()
          Returns true if the receiver is grayed, and false otherwise.
 int getItemCount()
          Returns the number of items contained in the receiver that are direct item children of the receiver.
 TreeItem[] getItems()
          Returns a (possibly empty) array of TreeItems which are the direct item children of the receiver.
 Tree getParent()
          Returns the receiver's parent, which must be a Tree.
 TreeItem getParentItem()
          Returns the receiver's parent item, which must be a TreeItem or null when the receiver is a root.
 void setBackground(Color color)
          Sets the receiver's background color to the color specified by the argument, or to the default system color for the item if the argument is null.
 void setChecked(boolean checked)
          Sets the checked state of the receiver.
 void setExpanded(boolean expanded)
          Sets the expanded state of the receiver.
 void setFont(Font font)
          Sets the font that the receiver will use to paint textual information for this item to the font specified by the argument, or to the default font for that kind of control if the argument is null.
 void setForeground(Color color)
          Sets the receiver's foreground color to the color specified by the argument, or to the default system color for the item if the argument is null.
 void setGrayed(boolean grayed)
          Sets the grayed state 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
checkSubclass, getImage, getText
 
Methods inherited from class org.eclipse.swt.widgets.Widget
addDisposeListener, addListener, checkWidget, dispose, getData, getData, getDisplay, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, setData, setData, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

TreeItem

public TreeItem(Tree parent,
                int style)
Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem) 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.

Parameters:
parent - a tree control which will be the parent of the new instance (cannot be null)
style - the style of control to construct
Throws:
java.lang.IllegalArgumentException -
SWTException -
See Also:
SWT, Widget.checkSubclass(), Widget.getStyle()

TreeItem

public TreeItem(Tree parent,
                int style,
                int index)
Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem), 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.

Parameters:
parent - a tree control which will be the parent of the new instance (cannot be null)
style - the style of control to construct
index - the index to store the receiver in its parent
Throws:
java.lang.IllegalArgumentException -
SWTException -
See Also:
SWT, Widget.checkSubclass(), Widget.getStyle()

TreeItem

public TreeItem(TreeItem parentItem,
                int style)
Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem) 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.

Parameters:
parentItem - a tree control which will be the parent of the new instance (cannot be null)
style - the style of control to construct
Throws:
java.lang.IllegalArgumentException -
SWTException -
See Also:
SWT, Widget.checkSubclass(), Widget.getStyle()

TreeItem

public TreeItem(TreeItem parentItem,
                int style,
                int index)
Constructs a new instance of this class given its parent (which must be a Tree or a TreeItem), 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.

Parameters:
parentItem - a tree control which will be the parent of the new instance (cannot be null)
style - the style of control to construct
index - the index to store the receiver in its parent
Throws:
java.lang.IllegalArgumentException -
SWTException -
See Also:
SWT, Widget.checkSubclass(), Widget.getStyle()
Method Detail

getBackground

public Color getBackground()
Returns the receiver's background color.

Returns:
the background color
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
Since:
2.0

getBounds

public Rectangle getBounds()
Returns a rectangle describing the receiver's size and location relative to its parent.

Returns:
the receiver's bounding rectangle
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getChecked

public boolean getChecked()
Returns true if the receiver is checked, and false otherwise. When the parent does not have the CHECK style, return false.

Returns:
the checked state
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getExpanded

public boolean getExpanded()
Returns true if the receiver is expanded, and false otherwise.

Returns:
the expanded state
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getFont

public Font getFont()
Returns the font that the receiver will use to paint textual information for this item.

Returns:
the receiver's font
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
Since:
3.0

getForeground

public Color getForeground()
Returns the foreground color that the receiver will use to draw.

Returns:
the receiver's foreground color
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
Since:
2.0

getGrayed

public boolean getGrayed()
Returns true if the receiver is grayed, and false otherwise. When the parent does not have the CHECK style, return false.

Returns:
the grayed state
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getItemCount

public int getItemCount()
Returns the number of items contained in the receiver that are direct item children of the receiver.

Returns:
the number of items
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getItems

public TreeItem[] getItems()
Returns a (possibly empty) array of TreeItems which are the direct item children of the receiver.

Note: This is not the actual structure used by the receiver to maintain its list of items, so modifying the array will not affect the receiver.

Returns:
the receiver's items
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getParent

public Tree getParent()
Returns the receiver's parent, which must be a Tree.

Returns:
the receiver's parent
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getParentItem

public TreeItem getParentItem()
Returns the receiver's parent item, which must be a TreeItem or null when the receiver is a root.

Returns:
the receiver's parent item
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setBackground

public void setBackground(Color color)
Sets the receiver's background color to the color specified by the argument, or to the default system color for the item if the argument is null.

Parameters:
color - the new color (or null)
Throws:
java.lang.IllegalArgumentException -
  • ERROR_INVALID_ARGUMENT - if the argument has been disposed
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
Since:
2.0

setChecked

public void setChecked(boolean checked)
Sets the checked state of the receiver.

Parameters:
checked - the new checked state
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setExpanded

public void setExpanded(boolean expanded)
Sets the expanded state of the receiver.

Parameters:
expanded - the new expanded state
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setFont

public void setFont(Font font)
Sets the font that the receiver will use to paint textual information for this item to the font specified by the argument, or to the default font for that kind of control if the argument is null.

Parameters:
font - the new font (or null)
Throws:
java.lang.IllegalArgumentException -
  • ERROR_INVALID_ARGUMENT - if the argument has been disposed
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
Since:
3.0

setForeground

public void setForeground(Color color)
Sets the receiver's foreground color to the color specified by the argument, or to the default system color for the item if the argument is null.

Parameters:
color - the new color (or null)
Throws:
java.lang.IllegalArgumentException -
  • ERROR_INVALID_ARGUMENT - if the argument has been disposed
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
Since:
2.0, 2.0

setGrayed

public void setGrayed(boolean grayed)
Sets the grayed state of the receiver.

Parameters:
grayed - the new grayed state
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setImage

public void setImage(Image image)
Description copied from class: Item
Sets the receiver's image to the argument, which may be null indicating that no image should be displayed.

Overrides:
setImage in class Item
Parameters:
image - the image to display on the receiver (may be null)

setText

public void setText(java.lang.String string)
Description copied from class: Item
Sets the receiver's text.

Overrides:
setText in class Item
Parameters:
string - the new text
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