Class TreeItem
- All Implemented Interfaces:
- Adaptable
- Styles:
- (none)
- Events:
- (none)
IMPORTANT: This class is not intended to be subclassed.
- Since:
- 1.0
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Constructor SummaryConstructorsConstructorDescriptionConstructs a new instance of this class given its parent (which must be aTreeor aTreeItem) and a style value describing its behavior and appearance.Constructs a new instance of this class given its parent (which must be aTreeor aTreeItem), a style value describing its behavior and appearance, and the index at which to place it in the items maintained by its parent.Constructs a new instance of this class given its parent (which must be aTreeor aTreeItem) and a style value describing its behavior and appearance.Constructs a new instance of this class given its parent (which must be aTreeor aTreeItem), a style value describing its behavior and appearance, and the index at which to place it in the items maintained by its parent.
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Method SummaryModifier and TypeMethodDescriptionvoidclear(int index, boolean recursive) Clears the item at the given zero-relative index in the receiver.voidclearAll(boolean recursive) Clears all the items in the receiver.<T> TgetAdapter(Class<T> adapter) Implementation of theAdaptableinterface.Returns the receiver's background color.getBackground(int index) Returns the background color at the given column index in the receiver.Returns a rectangle describing the receiver's size and location relative to its parent.getBounds(int index) Returns a rectangle describing the receiver's size and location relative to its parent at a column in the tree.booleanReturnstrueif the receiver is checked, and false otherwise.booleanReturnstrueif the receiver is expanded, and false otherwise.getFont()Returns the font that the receiver will use to paint textual information for this item.getFont(int index) Returns the font that the receiver will use to paint textual information for the specified cell in this item.Returns the foreground color that the receiver will use to draw.getForeground(int index) Returns the foreground color at the given column index in the receiver.booleanReturnstrueif the receiver is grayed, and false otherwise.getImage()Returns the receiver's image if it has one, or null if it does not.getImage(int index) Returns the image stored at the given column index in the receiver, or null if the image has not been set or if the column does not exist.getImageBounds(int index) Returns a rectangle describing the size and location relative to its parent of an image at a column in the tree.getItem(int index) Returns the item at the given, zero-relative index in the receiver.intReturns the number of items contained in the receiver that are direct item children of the receiver.TreeItem[]getItems()Returns a (possibly empty) array ofTreeItems which are the direct item children of the receiver.Returns the receiver's parent, which must be aTree.Returns the receiver's parent item, which must be aTreeItemor null when the receiver is a root.getText()Returns the receiver's text, which will be an empty string if it has never been set.getText(int index) Returns the text stored at the given column index in the receiver, or empty string if the text has not been set.getTextBounds(int index) Returns a rectangle describing the size and location relative to its parent of the text at a column in the tree.intSearches the receiver's list starting at the first item (index 0) until an item is found that is equal to the argument, and returns the index of that item.voidRemoves all of the items from the receiver.voidsetBackground(int index, Color color) Sets the background color at the given column index in the receiver to the color specified by the argument, or to the default system color for the item if the argument is null.voidsetBackground(Color value) 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.voidsetChecked(boolean checked) Sets the checked state of the receiver.voidsetExpanded(boolean expanded) Sets the expanded state of the receiver.voidSets the font that the receiver will use to paint textual information for the specified cell in this item to the font specified by the argument, or to the default font for that kind of control if the argument is null.voidSets 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.voidsetForeground(int index, Color color) Sets the foreground color at the given column index in the receiver to the color specified by the argument, or to the default system color for the item if the argument is null.voidsetForeground(Color value) 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.voidsetGrayed(boolean grayed) Sets the grayed state of the checkbox for this item.voidSets the receiver's image at a column.voidSets the receiver's image to the argument, which may be null indicating that no image should be displayed.voidSets the image for multiple columns in the tree.voidsetItemCount(int count) Sets the number of child items contained in the receiver.voidSets the receiver's text at a columnvoidSets the receiver's text.voidSets the text for multiple columns in the tree.Methods inherited from class org.eclipse.swt.widgets.WidgetaddDisposeListener, addListener, checkSubclass, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, reskin, setData, setData, toString
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Constructor Details- 
TreeItemConstructs a new instance of this class given its parent (which must be aTreeor aTreeItem) 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 SWTwhich is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using theint"|" operator) two or more of thoseSWTstyle 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:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the parent is null
 
- SWTException-- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
- ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
 
- See Also:
 
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TreeItemConstructs a new instance of this class given its parent (which must be aTreeor aTreeItem), 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 SWTwhich is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using theint"|" operator) two or more of thoseSWTstyle 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 zero-relative index to store the receiver in its parent
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the parent is null
- ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)
 
- SWTException-- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
- ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
 
- See Also:
 
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TreeItemConstructs a new instance of this class given its parent (which must be aTreeor aTreeItem) 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 SWTwhich is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using theint"|" operator) two or more of thoseSWTstyle 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:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the parent is null
 
- SWTException-- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
- ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
 
- See Also:
 
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TreeItemConstructs a new instance of this class given its parent (which must be aTreeor aTreeItem), 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 SWTwhich is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using theint"|" operator) two or more of thoseSWTstyle 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 zero-relative index to store the receiver in its parent
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the parent is null
- ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)
 
- SWTException-- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
- ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
 
- See Also:
 
 
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Method Details- 
getAdapterDescription copied from class:WidgetImplementation of theAdaptableinterface.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. - Specified by:
- getAdapterin interface- Adaptable
- Overrides:
- getAdapterin class- Widget
- Parameters:
- adapter- the lookup class
- Returns:
- an object that can be cast to the given class or nullif there is no adapter associated with the given class.
 
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getParentReturns the receiver's parent, which must be aTree.- 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
 
 
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getParentItemReturns the receiver's parent item, which must be aTreeItemor 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
 
 
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setExpandedpublic 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
 
 
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getExpandedpublic boolean getExpanded()Returnstrueif 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
 
 
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getBoundsReturns 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
 
 
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getBoundsReturns a rectangle describing the receiver's size and location relative to its parent at a column in the tree.- Parameters:
- index- the index that specifies the column
- Returns:
- the receiver's bounding column 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
 
 
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getBackgroundReturns the background color at the given column index in the receiver.- Parameters:
- index- the column index
- 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
 
 
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getFontReturns the font that the receiver will use to paint textual information for the specified cell in this item.- Parameters:
- index- the column index
- 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
 
 
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getForegroundReturns the foreground color at the given column index in the receiver.- Parameters:
- index- the column index
- Returns:
- the 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
 
 
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setBackgroundSets the background color at the given column index in the receiver to the color specified by the argument, or to the default system color for the item if the argument is null.- Parameters:
- index- the column index
- color- the new color (or null)
- Throws:
- 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
 
 
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setFontSets the font that the receiver will use to paint textual information for the specified cell in 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:
- index- the column index
- font- the new font (or null)
- Throws:
- 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
 
 
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setForegroundSets the foreground color at the given column index in the receiver to the color specified by the argument, or to the default system color for the item if the argument is null.- Parameters:
- index- the column index
- color- the new color (or null)
- Throws:
- 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
 
 
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setFontSets 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:
- 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
 
 
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getFontReturns 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
 
 
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setBackgroundSets 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:
- value- the new color (or null)
- Throws:
- 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
 
 
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getBackgroundReturns 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
 
 
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getForegroundReturns 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
 
 
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setForegroundSets 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:
- value- the new color (or null)
- Throws:
- 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
 
 
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setCheckedpublic 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
 
 
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getCheckedpublic boolean getChecked()Returnstrueif the receiver is checked, and false otherwise. When the parent does not have theCHECK 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
 
 
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setGrayedpublic void setGrayed(boolean grayed) Sets the grayed state of the checkbox for this item. This state change only applies if the Tree was created with the SWT.CHECK style.- Parameters:
- grayed- the new grayed state of the checkbox
- 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
 
 
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getGrayedpublic boolean getGrayed()Returnstrueif the receiver is grayed, and false otherwise. When the parent does not have theCHECK style, return false.- Returns:
- the grayed state of the checkbox
- 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
 
 
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getTextReturns the receiver's text, which will be an empty string if it has never been set.- Overrides:
- getTextin class- Item
- Returns:
- the receiver's text
- 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
 
 
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getTextReturns the text stored at the given column index in the receiver, or empty string if the text has not been set.- Parameters:
- index- the column index
- Returns:
- the text stored at the given column index in the receiver
- 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
 
 
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getTextBoundsReturns a rectangle describing the size and location relative to its parent of the text at a column in the tree.- Parameters:
- index- the index that specifies the column
- Returns:
- the receiver's bounding text 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
 
- Since:
- 1.3
 
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setTextSets the text for multiple columns in the tree.- Parameters:
- value- the array of new strings
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the text is null
 
- SWTException-- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
 
 
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setTextSets the receiver's text.- Overrides:
- setTextin class- Item
- Parameters:
- text- the new text
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the text is null
 
- SWTException-- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
 
 
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setTextSets the receiver's text at a column- Parameters:
- index- the column index
- text- the new text
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the text is null
 
- SWTException-- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
 
 
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getImageReturns the receiver's image if it has one, or null if it does not.- Overrides:
- getImagein class- Item
- Returns:
- the receiver's image
- 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:
- 1.4
 
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getImageReturns the image stored at the given column index in the receiver, or null if the image has not been set or if the column does not exist.- Parameters:
- index- the column index
- Returns:
- the image stored at the given column index in the receiver
- 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
 
 
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getImageBoundsReturns a rectangle describing the size and location relative to its parent of an image at a column in the tree.- Parameters:
- index- the index that specifies the column
- Returns:
- the receiver's bounding image 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
 
 
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clearpublic void clear(int index, boolean recursive) Clears the item at the given zero-relative index in the receiver. The text, icon and other attributes of the item are set to the default value. If the tree was created with theSWT.VIRTUALstyle, these attributes are requested again as needed.- Parameters:
- index- the index of the item to clear
- recursive-- trueif all child items of the indexed item should be cleared recursively, and- falseotherwise
- Throws:
- IllegalArgumentException-- ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
 
- SWTException-- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
 
- See Also:
 
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setImageDescription copied from class:ItemSets the receiver's image to the argument, which may be null indicating that no image should be displayed.
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setImageSets the receiver's image at a column.- Parameters:
- index- the column index
- image- the new image
- Throws:
- IllegalArgumentException-- ERROR_INVALID_ARGUMENT - if the image 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
 
 
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setImageSets the image for multiple columns in the tree.- Parameters:
- value- the array of new images
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the array of images is null
- ERROR_INVALID_ARGUMENT - if one of the images 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
 
 
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clearAllpublic void clearAll(boolean recursive) Clears all the items in the receiver. The text, icon and other attributes of the items are set to their default values. If the tree was created with theSWT.VIRTUALstyle, these attributes are requested again as needed.- Parameters:
- recursive-- trueif all child items should be cleared recursively, and- falseotherwise
- 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
 
- See Also:
 
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getItemsReturns a (possibly empty) array ofTreeItems 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
 
 
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getItemReturns the item at the given, zero-relative index in the receiver. Throws an exception if the index is out of range.- Parameters:
- index- the index of the item to return
- Returns:
- the item at the given index
- Throws:
- IllegalArgumentException-- ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
 
- SWTException-- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
 
 
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getItemCountpublic 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
 
 
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indexOfSearches the receiver's list starting at the first item (index 0) until an item is found that is equal to the argument, and returns the index of that item. If no item is found, returns -1.- Parameters:
- item- the search item
- Returns:
- the index of the item
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if the tool item is null
- ERROR_INVALID_ARGUMENT - if the tool item 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
 
 
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removeAllpublic void removeAll()Removes all of the items from the receiver.- 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
 
 
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setItemCountpublic void setItemCount(int count) Sets the number of child items contained in the receiver.- Parameters:
- count- 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
 
 
 
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