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CLASS:: TreeViewItem
summary:: An item in TreeView
categories:: GUI>Views
DESCRIPTION::
An instance of TreeViewItem represents an item in TreeView. There may be multiple instances representing the same item, e.g. after calling link::Classes/TreeView#-currentItem:: multiple times.
INSTANCEMETHODS::
PRIVATE:: prValidItem
METHOD:: index
RETURNS:: An integer position of this item among its siblings.
METHOD:: parent
RETURNS:: An new instance of TreeViewItem representing the parent item.
METHOD:: childAt
RETURNS:: A new instance of TreeViewItem representing the child item at code::index::.
METHOD:: addChild
Appends a new child to this item.
ARGUMENT:: strings
An array of Strings (or nil), each for the text of one data field.
RETURNS::
An instance of TreeViewItem representing the new item.
METHOD:: insertChild
Inserts a new child to this item at code::index::.
ARGUMENT:: index
The position at which to insert the child.
ARGUMENT:: strings
An array of Strings (or nil), each for the text of one data field.
RETURNS::
An instance of TreeViewItem representing the new item.
METHOD:: strings
The text in the data fields.
ARGUMENT:: strings
An array of Strings (or nil), each for the text of one data field.
METHOD:: setString
Sets the text in the given data field.
ARGUMENT:: column
An integer index of a data field.
ARGUMENT:: string
A String or nil.
METHOD:: colors
The background colors of the data fields.
ARGUMENT:: colors
An array of Colors, each for the color of one data field.
METHOD:: setColor
Sets the background color of the given data field.
ARGUMENT:: column
An integer index of a data field.
ARGUMENT:: color
A Color.
METHOD:: textColors
The text colors of the data fields.
ARGUMENT:: textColors
An array of Colors, each for the color of one data field.
METHOD:: setTextColor
Sets the text color of the given data field.
ARGUMENT:: column
An integer index of a data field.
ARGUMENT:: color
A Color.
METHOD:: setView
Places another view into the given data field. Only one view can be placed into a data field at once. If a view is already present, it will be removed and destroyed.
If the number of data fields decreases due to a call to link::Classes/TreeView#-columns::, the views contained in removed data fields will also be removed and destroyed.
ARGUMENT:: column
An integer index of a data field.
ARGUMENT:: view
A View.
METHOD:: removeView
Removes the view from the given data field, if any.
ARGUMENT:: column
An integer index of a data field.
METHOD:: view
The view in the given data field.
ARGUMENT:: column
An integer index of a data field.
METHOD:: ==
Implements equality comparison between two TreeViewItem instances. Two instances are equal if they represent the same item in TreeView.
RETURNS:: A Boolean.
METHOD:: isNull
Whether the item is invalid. After an item is removed, all related TreeViewItem instances become invalid.
RETURNS:: A Boolean.
EXAMPLES::
CODE::
(
t = TreeView().front;
t.columns_(["one", "two", "three"]);
t.addItem(["Alice", "Anna", "Anders"]);
t.addItem(["Bob", "Beatrice", "Benny"]);
t.addItem(["Cleo", "Conrad", "Cecilia"]);
)
i = t.itemAt(1); //get an item
i.setString(1, "Hans");
i.setColor(1, Color.red);
i.setTextColor(1, Color.white);
i.addChild(["Bengt", "Bodil", "Ben"]);
i.strings;
i.childAt(0).strings;
::
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