Google Apps Script

Class Tree

A standard hierarchical tree widget. The tree contains a hierarchy of TreeItems that the user can open, close, and select.

Internally, UiApp widgets are built on top of the Google Web Toolkit, and it can sometimes be helpful to look at the GWT documentation directly. You can find the Tree documentation here.

Methods

MethodReturn typeBrief description
add(widget)TreeAdd a widget to the Tree.
addBlurHandler(handler)TreeAdd a handler for blur events (losing keyboard focus).
addCloseHandler(handler)TreeAdd a handler for close events.
addFocusHandler(handler)TreeAdd a handler for focus events (gaining keyboard focus).
addItem(text)TreeAdds a new child tree item containing the specified HTML.
addItem(item)TreeAdds a TreeItem as a child to this Tree.
addItem(widget)TreeAdds a new child tree item containing the specified widget.
addKeyDownHandler(handler)TreeAdd a handler for key down events.
addKeyPressHandler(handler)TreeAdd a handler for key press events.
addKeyUpHandler(handler)TreeAdd a handler for key up events.
addMouseDownHandler(handler)TreeAdd a handler for mouse down events.
addMouseMoveHandler(handler)TreeAdd a handler for mouse move events.
addMouseOutHandler(handler)TreeAdd a handler for mouse out events.
addMouseOverHandler(handler)TreeAdd a handler for mouse move events.
addMouseUpHandler(handler)TreeAdd a handler for mouse up events.
addMouseWheelHandler(handler)TreeAdd a handler for mouse wheel events.
addOpenHandler(handler)TreeAdd a handler for open events.
addSelectionHandler(handler)TreeAdd a handler for selection events.
addStyleDependentName(styleName)TreeSets the dependent style name of this Tree.
addStyleName(styleName)TreeAdds a style name to this Tree.
clear()TreeRemoves all children.
getId()StringReturns the id that has been assigned to this object.
getTag()StringGets the text tag of this Tree.
getType()StringGets the type of this object.
setAnimationEnabled(animationEnabled)TreeSets whether opening and closing the Tree is animated.
setFocus(focus)TreeExplicitly focus/unfocus this Tree.
setHeight(height)TreeSets the height of this Tree.
setId(id)TreeSets the id of this Tree.
setPixelSize(width, height)TreeSets the size of this Tree in pixels.
setSelectedItem(item)TreeSelects the given item.
setSelectedItem(item, fireEvents)TreeSelects the given item and optionally fire events.
setSize(width, height)TreeSets the size of this Tree.
setStyleAttribute(attribute, value)TreeSets one of this Tree's style attributes to a new value.
setStyleAttributes(attributes)TreeSets this Tree's style attributes.
setStyleName(styleName)TreeSets the style name of this Tree.
setStylePrimaryName(styleName)TreeSets the primary style name of this Tree.
setTabIndex(index)TreeSets the Tree's position in the tab index.
setTag(tag)TreeSets the text tag of this Tree.
setTitle(title)TreeSets the hover title of this Tree.
setVisible(visible)TreeSets whether this Tree is visible.
setWidth(width)TreeSets the width of this Tree.

Detailed documentation

add(widget)

Add a widget to the Tree.

Parameters

NameTypeDescription
widgetWidgetthe widget to add.

Return

Tree — the Tree itself, useful for chaining.


addBlurHandler(handler)

Add a handler for blur events (losing keyboard focus).

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addBlurHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "blur".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addCloseHandler(handler)

Add a handler for close events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var item1 = app.createTreeItem("item1");
   item1.addItem(app.createTreeItem("item2"));
   var tree = app.createTree();
   tree.addItem(item1);
   var handler = app.createServerHandler("handlerFunction");
   tree.addCloseHandler(handler)
   app.add(tree);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "close".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
 }
 
In addition, the values of certain widgets can be sent up with the event as well as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addFocusHandler(handler)

Add a handler for focus events (gaining keyboard focus).

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addFocusHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "focus".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addItem(text)

Adds a new child tree item containing the specified HTML.

Parameters

NameTypeDescription
textStringthe new item's text, treated as HTML.

Return

Tree — the Tree itself, useful for chaining.


addItem(item)

Adds a TreeItem as a child to this Tree.

Parameters

NameTypeDescription
itemTreeItemthe child item.

Return

Tree — the Tree itself, useful for chaining.


addItem(widget)

Adds a new child tree item containing the specified widget.

Parameters

NameTypeDescription
widgetWidgetthe widget to put inside the new item.

Return

Tree — the Tree itself, useful for chaining.


addKeyDownHandler(handler)

Add a handler for key down events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addKeyDownHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "keydown".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // what key was pressed. See below for a link explaining what these values mean.
   var charCode = parameter.charCode;
   var keyCode = parameter.keyCode;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information. For an explanation of charCode and keyCode, including what to expect on different browsers, look here.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addKeyPressHandler(handler)

Add a handler for key press events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addKeyPressHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "keypress".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // what key was pressed. See below for a link explaining what these values mean.
   var charCode = parameter.charCode;
   var keyCode = parameter.keyCode;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information. For an explanation of charCode and keyCode, including what to expect on different browsers, look here.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addKeyUpHandler(handler)

Add a handler for key up events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addKeyUpHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "keyup".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // what key was pressed. See below for a link explaining what these values mean.
   var charCode = parameter.charCode;
   var keyCode = parameter.keyCode;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information. For an explanation of charCode and keyCode, including what to expect on different browsers, look here.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addMouseDownHandler(handler)

Add a handler for mouse down events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addMouseDownHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "mousedown".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // mouse x and y position relative to the widget that fired the event.
   var x = parameter.x;
   var y = parameter.y;
   // mouse x and y position within the browser window's client area.
   var clientX = parameter.clientX;
   var clientY = parameter.clientY;
   // mouse x and y position within the user's display.
   var screenX = parameter.screenX;
   var screenY = parameter.screenY;
   // the mouse button used. Left is 1, right is 2, and middle is 4.
   var button = parameter.button;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addMouseMoveHandler(handler)

Add a handler for mouse move events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addMouseMoveHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "mousemove".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // mouse x and y position relative to the widget that fired the event.
   var x = parameter.x;
   var y = parameter.y;
   // mouse x and y position within the browser window's client area.
   var clientX = parameter.clientX;
   var clientY = parameter.clientY;
   // mouse x and y position within the user's display.
   var screenX = parameter.screenX;
   var screenY = parameter.screenY;
   // the mouse button used. Left is 1, right is 2, and middle is 4.
   var button = parameter.button;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addMouseOutHandler(handler)

Add a handler for mouse out events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addMouseOutHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "mouseout".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // mouse x and y position relative to the widget that fired the event.
   var x = parameter.x;
   var y = parameter.y;
   // mouse x and y position within the browser window's client area.
   var clientX = parameter.clientX;
   var clientY = parameter.clientY;
   // mouse x and y position within the user's display.
   var screenX = parameter.screenX;
   var screenY = parameter.screenY;
   // the mouse button used. Left is 1, right is 2, and middle is 4.
   var button = parameter.button;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addMouseOverHandler(handler)

Add a handler for mouse move events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addMouseOverHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "mousover".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // mouse x and y position relative to the widget that fired the event.
   var x = parameter.x;
   var y = parameter.y;
   // mouse x and y position within the browser window's client area.
   var clientX = parameter.clientX;
   var clientY = parameter.clientY;
   // mouse x and y position within the user's display.
   var screenX = parameter.screenX;
   var screenY = parameter.screenY;
   // the mouse button used. Left is 1, right is 2, and middle is 4.
   var button = parameter.button;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addMouseUpHandler(handler)

Add a handler for mouse up events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addMouseUpHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "mouseup".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // mouse x and y position relative to the widget that fired the event.
   var x = parameter.x;
   var y = parameter.y;
   // mouse x and y position within the browser window's client area.
   var clientX = parameter.clientX;
   var clientY = parameter.clientY;
   // mouse x and y position within the user's display.
   var screenX = parameter.screenX;
   var screenY = parameter.screenY;
   // the mouse button used. Left is 1, right is 2, and middle is 4.
   var button = parameter.button;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addMouseWheelHandler(handler)

Add a handler for mouse wheel events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var button = app.createButton("a button");
   var handler = app.createServerHandler("handlerFunction");
   button.addMouseWheelHandler(handler);
   app.add(button);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "mousewheel".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
   // mouse x and y position relative to the widget that fired the event.
   var x = parameter.x;
   var y = parameter.y;
   // mouse x and y position within the browser window's client area.
   var clientX = parameter.clientX;
   var clientY = parameter.clientY;
   // mouse x and y position within the user's display.
   var screenX = parameter.screenX;
   var screenY = parameter.screenY;
   // the mouse button used. Left is 1, right is 2, and middle is 4.
   var button = parameter.button;
   // whether the various modifier keys were also pressed (true or false)
   var shift = parameter.shift;
   var alt = parameter.alt;
   var ctrl = parameter.ctrl;
   var meta = parameter.meta;
 }
 
In addition, the values of certain widgets can be sent up with the event as well, as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addOpenHandler(handler)

Add a handler for open events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var item1 = app.createTreeItem("item1");
   item1.addItem(app.createTreeItem("item2"));
   var tree = app.createTree();
   tree.addItem(item1);
   var handler = app.createServerHandler("handlerFunction");
   tree.addOpenHandler(handler)
   app.add(tree);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "close".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
 }
 
In addition, the values of certain widgets can be sent up with the event as well as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addSelectionHandler(handler)

Add a handler for selection events.

Note that you can have multiple handlers for the same event on the same widget. They will be called in the order that they were added to the widget, although ServerHandlers may appear to happen simultaneously.

The handler passes back some information to the server about what happened. This information can be accessed as follows:

 
function doGet() {
   var app = UiApp.createApplication();
   var item1 = app.createTreeItem("item1");
   item1.addItem(app.createTreeItem("item2"));
   var tree = app.createTree();
   tree.addItem(item1);
   var handler = app.createServerHandler("handlerFunction");
   tree.addSelectionHandler(handler)
   app.add(tree);
   return app;
 }

 function handlerFunction(eventInfo) {
   var parameter = eventInfo.parameter;
   // the type of event, in this case "selection".
   var eventType = parameter.eventType;
   // the id of the widget that fired this event.
   var source = parameter.source;
 }
 
In addition, the values of certain widgets can be sent up with the event as well as "callback elements." See the documentation of ServerHandler for more information.

Parameters

NameTypeDescription
handlerHandlerthe handler to execute when the event occurs. This can be a ClientHandler or a ServerHandler.

Return

Tree — the Tree itself, useful for chaining.


addStyleDependentName(styleName)

Sets the dependent style name of this Tree.

This is useful for debugging but is otherwise of minimal use since there is no way to use custom stylesheets in UiApp.

Parameters

NameTypeDescription
styleNameStringthe new style name.

Return

Tree — the Tree itself, useful for chaining.


addStyleName(styleName)

Adds a style name to this Tree.

This is useful for debugging but is otherwise of minimal use since there is no way to use custom stylesheets in UiApp.

Parameters

NameTypeDescription
styleNameStringthe new style name.

Return

Tree — the Tree itself, useful for chaining.


clear()

Removes all children.

Return

Tree — the Tree itself, useful for chaining.


getId()

Returns the id that has been assigned to this object.

This can be used in conjunction with app.getElementById() to retrieve a reference to this object.

Return

String — the id that has been assigned to this object


getTag()

Gets the text tag of this Tree.

Return

String — the text tag.


getType()

Gets the type of this object.

Return

String — the object type


setAnimationEnabled(animationEnabled)

Sets whether opening and closing the Tree is animated.

Parameters

NameTypeDescription
animationEnabledBooleanwhether to animate opening and closing.

Return

Tree — the Tree itself, useful for chaining.


setFocus(focus)

Explicitly focus/unfocus this Tree.

Only one widget can have focus at a time, and the widget that does will receive all keyboard events.

Parameters

NameTypeDescription
focusBooleanwhether the Tree should have the current focus.

Return

Tree — the Tree itself, useful for chaining.


setHeight(height)

Sets the height of this Tree.

Parameters

NameTypeDescription
heightStringthe new height in any CSS unit such as "10px" or "50%".

Return

Tree — the Tree itself, useful for chaining.


setId(id)

Sets the id of this Tree.

Parameters

NameTypeDescription
idStringthe new id, which can be used to retrieve the Tree from app.getElementById(id).

Return

Tree — the Tree itself, useful for chaining.


setPixelSize(width, height)

Sets the size of this Tree in pixels.

Parameters

NameTypeDescription
widthIntegerthe new width in pixels.
heightIntegerthe new height in pixels.

Return

Tree — the Tree itself, useful for chaining.


setSelectedItem(item)

Selects the given item.

This does not fire any events.

Parameters

NameTypeDescription
itemTreeItemthe item to select.

Return

Tree — the Tree itself, useful for chaining.


setSelectedItem(item, fireEvents)

Selects the given item and optionally fire events.

Parameters

NameTypeDescription
itemTreeItemthe item to select.
fireEventsBooleanwhether to fire events.

Return

Tree — the Tree itself, useful for chaining.


setSize(width, height)

Sets the size of this Tree.

Parameters

NameTypeDescription
widthStringthe new width in any CSS unit such as "10px" or "50%".
heightStringthe new height in any CSS unit such as "10px" or "50%".

Return

Tree — the Tree itself, useful for chaining.


setStyleAttribute(attribute, value)

Sets one of this Tree's style attributes to a new value. Valid attributes are listed here; the values for each attribute are the same as those available in CSS style sheets.

 
// Change the widget's background to black and text color to green.
 widget.setStyleAttribute("background", "black")
     .setStyleAttribute("color", "green");
 

Parameters

NameTypeDescription
attributeStringthe CSS attribute, in camel-case ("fontSize", not "font-size"), as listed here
valueStringthe CSS value

Return

Tree — the Tree itself, useful for chaining.


setStyleAttributes(attributes)

Sets this Tree's style attributes. This is a convenience method that is equivalent to calling setStyleAttribute with every key/value pair in the attributes object. Valid attributes are listed here; the values for each attribute are the same as those available in CSS style sheets.

 
// Change the widget's background to black and text color to green.
 widget.setStyleAttributes({background: "black", color: "green"});
 

Parameters

NameTypeDescription
attributesObjectan object of key/value pairs for the CSS attributes and values to set; valid attributes are listed here

Return

Tree — the Tree itself, useful for chaining.


setStyleName(styleName)

Sets the style name of this Tree.

This is useful for debugging but is otherwise of minimal use since there is no way to use custom stylesheets in UiApp.

Parameters

NameTypeDescription
styleNameStringthe new style name.

Return

Tree — the Tree itself, useful for chaining.


setStylePrimaryName(styleName)

Sets the primary style name of this Tree.

This is useful for debugging but is otherwise of minimal use since there is no way to use custom stylesheets in UiApp.

Parameters

NameTypeDescription
styleNameStringthe new style name.

Return

Tree — the Tree itself, useful for chaining.


setTabIndex(index)

Sets the Tree's position in the tab index.

If more than one widget has the same tab index, each such widget will receive focus in an arbitrary order. Setting the tab index to -1 will cause this widget to be removed from the tab order.

Parameters

NameTypeDescription
indexIntegerthe new tab index.

Return

Tree — the Tree itself, useful for chaining.


setTag(tag)

Sets the text tag of this Tree.

Parameters

NameTypeDescription
tagStringthe new text tag, which can be anything you wish to store with the widget.

Return

Tree — the Tree itself, useful for chaining.


setTitle(title)

Sets the hover title of this Tree.

Not all browsers will show this.

Parameters

NameTypeDescription
titleStringthe hover title.

Return

Tree — the Tree itself, useful for chaining.


setVisible(visible)

Sets whether this Tree is visible.

Parameters

NameTypeDescription
visibleBooleanwhether this Tree should be visible or not.

Return

Tree — the Tree itself, useful for chaining.


setWidth(width)

Sets the width of this Tree.

Parameters

NameTypeDescription
widthStringthe new width in any CSS unit such as "10px" or "50%".

Return

Tree — the Tree itself, useful for chaining.

Deprecated methods


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