Package org.eclipse.swt.widgets

Class TreeItem

java.lang.Object
org.eclipse.swt.widgets.Widget
org.eclipse.swt.widgets.Item
org.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.

See Also:
Restriction:
This class is not intended to be subclassed by clients.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    long
    handle
    the handle to the OS resource (Warning: This field is platform dependent)

    Fields inherited from class org.eclipse.swt.widgets.Widget

    nativeZoom

  • Constructor Summary

    Constructors
    Constructor
    Description
    TreeItem(TreeItem parentItem, int style)
    Constructs TreeItem and inserts it into Tree.
    TreeItem(TreeItem parentItem, int style, int index)
    Constructs TreeItem and inserts it into Tree.
    TreeItem(Tree parent, int style)
    Constructs TreeItem and inserts it into Tree.
    TreeItem(Tree parent, int style, int index)
    Constructs TreeItem and inserts it into Tree.

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    checkSubclass()
    Checks that this class can be subclassed.
    void
    clear(int index, boolean all)
    Clears the item at the given zero-relative index in the receiver.
    void
    clearAll(boolean all)
    Clears all the items in the receiver.
    Color
    getBackground()
    Returns the receiver's background color.
    Color
    getBackground(int index)
    Returns the background color at the given column index in the receiver.
    Rectangle
    getBounds()
    Returns a rectangle describing the size and location of the receiver's text relative to its parent.
    Rectangle
    getBounds(int index)
    Returns a rectangle describing the receiver's size and location relative to its parent at a column in the tree.
    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.
    Font
    getFont(int index)
    Returns the font that the receiver will use to paint textual information for the specified cell in this item.
    Color
    getForeground()
    Returns the foreground color that the receiver will use to draw.
    Color
    getForeground(int index)
    Returns the foreground color at the given column index in the receiver.
    boolean
    getGrayed()
    Returns true if the receiver is grayed, and false otherwise.
    Image
    getImage()
    Returns the receiver's image if it has one, or null if it does not.
    Image
    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.
    Rectangle
    getImageBounds(int index)
    Returns a rectangle describing the size and location relative to its parent of an image at a column in the tree.
    TreeItem
    getItem(int index)
    Returns the item at the given, zero-relative index in the receiver.
    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.
    String
    getText()
    Returns the receiver's text, which will be an empty string if it has never been set.
    String
    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.
    Rectangle
    getTextBounds(int index)
    Returns a rectangle describing the size and location relative to its parent of the text at a column in the tree.
    int
    indexOf(TreeItem item)
    Searches 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.
    void
    removeAll()
    Removes all of the items from the receiver.
    void
    setBackground(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.
    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(int index, Font font)
    Sets 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.
    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(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.
    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 checkbox for this item.
    void
    setImage(int index, Image image)
    Sets the receiver's image at a column.
    void
    setImage(Image image)
    Sets the receiver's image to the argument, which may be null indicating that no image should be displayed.
    void
    setImage(Image[] images)
    Sets the image for multiple columns in the tree.
    void
    setItemCount(int count)
    Sets the number of child items contained in the receiver.
    void
    setText(int index, String string)
    Sets the receiver's text at a column
    void
    setText(String string)
    Sets the receiver's text.
    void
    setText(String[] strings)
    Sets the text for multiple columns in the tree.

    Methods inherited from class org.eclipse.swt.widgets.Widget

    addDisposeListener, addListener, addTypedListener, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, getTypedListeners, isAutoDirection, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, removeTypedListener, reskin, setData, setData, toString

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

  • Field Details

    • handle

      public long handle
      the handle to the OS resource (Warning: This field is platform dependent)

      IMPORTANT: This field is not part of the SWT public API. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms and should never be accessed from application code.

      Restriction:
      This field is not intended to be referenced by clients.

  • Constructor Details

    • TreeItem

      public TreeItem(Tree parent, int style)
      Constructs TreeItem and inserts it into Tree. Item is inserted as last direct child of the tree.

      The fastest way to insert many items is documented in TreeItem(Tree,int,int) and setItemCount(int)

      Parameters:
      parent - a tree control which will be the parent of the new instance (cannot be null)
      style - no styles are currently supported, pass SWT.NONE
      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:

    • TreeItem

      public TreeItem(Tree parent, int style, int index)
      Constructs TreeItem and inserts it into Tree. Item is inserted as index direct child of the tree.

      The fastest way to insert many items is:

      1. Use Tree.setRedraw(boolean) to disable drawing during bulk insert
      2. Insert every item at index 0 (insert them in reverse to get the same result)
      3. Collapse the parent item before inserting (gives massive improvement on Windows)
      Parameters:
      parent - a tree control which will be the parent of the new instance (cannot be null)
      style - no styles are currently supported, pass SWT.NONE
      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:

    • TreeItem

      public TreeItem(TreeItem parentItem, int style)
      Constructs TreeItem and inserts it into Tree. Item is inserted as last direct child of the specified TreeItem.

      The fastest way to insert many items is documented in TreeItem(Tree,int,int) and setItemCount(int)

      Parameters:
      parentItem - a tree control which will be the parent of the new instance (cannot be null)
      style - no styles are currently supported, pass SWT.NONE
      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:

    • TreeItem

      public TreeItem(TreeItem parentItem, int style, int index)
      Constructs TreeItem and inserts it into Tree. Item is inserted as index direct child of the specified TreeItem.

      The fastest way to insert many items is documented in TreeItem(Tree,int,int) and setItemCount(int)

      Parameters:
      parentItem - a tree control which will be the parent of the new instance (cannot be null)
      style - no styles are currently supported, pass SWT.NONE
      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:

  • Method Details

    • checkSubclass

      protected void checkSubclass()
      Description copied from class: Widget
      Checks that this class can be subclassed.

      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.

      Overrides:
      checkSubclass in class Item

    • clear

      public void clear(int index, boolean all)
      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 the SWT.VIRTUAL style, these attributes are requested again as needed.
      Parameters:
      index - the index of the item to clear
      all - true if all child items of the indexed item should be cleared recursively, and false otherwise
      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
      Since:
      3.2
      See Also:

    • clearAll

      public void clearAll(boolean all)
      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 the SWT.VIRTUAL style, these attributes are requested again as needed.
      Parameters:
      all - true if all child items should be cleared recursively, and false otherwise
      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:
      3.2
      See Also:

    • 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

    • getBackground

      public Color getBackground(int index)
      Returns 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
      Since:
      3.1

    • getBounds

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

    • getBounds

      public Rectangle getBounds(int index)
      Returns 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
      Since:
      3.1

    • 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

    • getFont

      public Font getFont(int index)
      Returns 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
      Since:
      3.1

    • 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

    • getForeground

      public Color getForeground(int index)
      Returns 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
      Since:
      3.1

    • 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 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

    • getItem

      public TreeItem getItem(int index)
      Returns 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
      Since:
      3.1

    • 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

    • getImage

      public Image getImage()
      Description copied from class: Item
      Returns the receiver's image if it has one, or null if it does not.
      Overrides:
      getImage in class Item
      Returns:
      the receiver's image

    • getImage

      public Image 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.
      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
      Since:
      3.1

    • getImageBounds

      public Rectangle getImageBounds(int index)
      Returns 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
      Since:
      3.1

    • 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

    • getText

      public String getText()
      Description copied from class: Item
      Returns the receiver's text, which will be an empty string if it has never been set.
      Overrides:
      getText in class Item
      Returns:
      the receiver's text

    • getText

      public String 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.
      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
      Since:
      3.1

    • getTextBounds

      public Rectangle getTextBounds(int index)
      Returns 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:
      3.3

    • indexOf

      public int indexOf(TreeItem item)
      Searches 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 item is null
      • ERROR_INVALID_ARGUMENT - if the 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
      Since:
      3.1

    • removeAll

      public 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
      Since:
      3.1

    • 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:
      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

    • setBackground

      public void setBackground(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.
      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
      Since:
      3.1

    • 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:
      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

    • setFont

      public void setFont(int index, Font font)
      Sets 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
      Since:
      3.1

    • 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:
      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

    • setForeground

      public void setForeground(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.
      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
      Since:
      3.1

    • setGrayed

      public 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

    • setImage

      public void setImage(Image[] images)
      Sets the image for multiple columns in the tree.
      Parameters:
      images - 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
      Since:
      3.1

    • setImage

      public void setImage(int index, Image image)
      Sets 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
      Since:
      3.1

    • 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)

    • setItemCount

      public void setItemCount(int count)
      Sets the number of child items contained in the receiver.

      The fastest way to insert many items is:

      1. Use Tree.setRedraw(boolean) to disable drawing during bulk insert
      2. Collapse the parent item before inserting (gives massive improvement on Windows)
      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
      Since:
      3.2

    • setText

      public void setText(String[] strings)
      Sets the text for multiple columns in the tree.

      Note: If control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.

      Parameters:
      strings - 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
      Since:
      3.1

    • setText

      public void setText(int index, String string)
      Sets the receiver's text at a column

      Note: If control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.

      Parameters:
      index - the column index
      string - 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
      Since:
      3.1

    • setText

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

      Note: If control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.

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