treeView

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Synopsis

treeView [-addItem string string] [-allowDragAndDrop boolean] [-allowHiddenParents boolean] [-allowMultiSelection boolean] [-allowReparenting boolean] [-annotation string] [-attachButtonRight int] [-backgroundColor float float float] [-borderHighlite string boolean] [-borderHighliteColor string float float float] [-buttonErase string boolean] [-buttonState string int string] [-buttonStyle string int string] [-buttonTextIcon string int string] [-buttonTooltip string int string] [-buttonTransparencyColor string int float float float] [-buttonTransparencyOverride string int boolean] [-buttonVisible string int boolean] [-children string] [-clearSelection] [-contextMenuCommand script] [-defineTemplate string] [-displayLabel string string] [-displayLabelSuffix string string] [-docTag string] [-dragAndDropCommand script] [-dragCallback script] [-dropCallback script] [-editLabelCommand script] [-enable boolean] [-enableBackground boolean] [-enableButton string int int] [-enableKeyboardFocus boolean] [-enableKeys boolean] [-enableLabel string int] [-exists] [-expandCollapseCommand script] [-expandItem string boolean] [-flatButton int] [-font string string] [-fontFace string int] [-fullPathName] [-height int] [-hideButtons] [-highlightColor float float float] [-highlite string boolean] [-highliteColor string float float float] [-ignoreButtonClick string int int] [-image string int string] [-insertItem string string int] [-isItemExpanded string] [-isLeaf string] [-isObscured] [-item string] [-itemAnnotation string string] [-itemDblClickCommand script] [-itemDblClickCommand2 script] [-itemExists string] [-itemIndex string] [-itemParent string] [-itemRenamedCommand script] [-itemSelected string] [-itemVisible string boolean] [-labelBackgroundColor string float float float] [-manage boolean] [-noBackground boolean] [-numberOfButtons int] [-numberOfPopupMenus] [-ornament string int int int] [-ornamentColor string float float float] [-parent string] [-popupMenuArray] [-pressCommand int script] [-preventOverride boolean] [-removeAll] [-removeItem string] [-reverseTreeOrder boolean] [-rightPressCommand int script] [-select string int] [-selectCommand script] [-selectItem string boolean] [-selectionChangedCommand script] [-selectionColor string float float float] [-showItem string] [-statusBarMessage string] [-textColor string float float float] [-useTemplate string] [-verticalScrollPosition int] [-visible boolean] [-visibleChangeCommand script] [-width int] [string]

treeView is undoable, queryable, and editable.

Return value

In query mode, return type is based on queried flag.

Flags

Long name (short name)	Argument types	Properties
-addItem(-ai)	string string
Adds a tree view item to the tree view. First argument specifies the item's name, second argument specifies the item's parent (use an empty string to have it at the top level of the tree)
-allowDragAndDrop(-adr)	boolean
Allow the user to perform drag and drop of treeView items. If enabled, re-ordering / re-parenting operations can be perfomed with the middle mouse button. This flag takes precendence over other drag and drop related flags. Defaults to true.
-allowHiddenParents(-ahp)	boolean
If not cleared(default), the treeView will make parent nodes of visible nodes automatically visible
-allowMultiSelection(-ams)	boolean
Specify multi or single selection mode. Allow the user to perform multiple selection by holding ctrl or shift key while selecting items of treeView items. Defaults to true.
-allowReparenting(-arp)	boolean
Allow the user to reparent items in the tree view using the middle mouse button. Defaults to true. If false, user can still reorder items within a group using the middle mouse button.
-annotation(-ann)	string
Annotate the control with an extra string value.
-attachButtonRight(-abr)	int
Sets tree view item's buttons to appear on the right or left. Argument specifies if they are to be attached to the right, if it is set to false they will attach on the left.
-backgroundColor(-bgc)	float float float
The background color of the control. The arguments correspond to the red, green, and blue color components. Each component ranges in value from 0.0 to 1.0. When setting backgroundColor, the background is automatically enabled, unless enableBackground is also specified with a false value.
-borderHighlite(-bh)	string boolean
Sets an item's border as highlit or not. First Argument specifies item, second argument specifies on or off.
-borderHighliteColor(-bcl)	string float float float
Sets the color an item's border highlite will turn when highlite is enabled. first parameter specifies layer three float values specify RGB values, between 0 and 1.
-buttonErase(-bef)	string boolean
If buttonErase was set true , then even if the button of the treeView item is set invisible , the treeView will still erase the buttonRect of this treeView item with background . First argument is the item name, second argument is whether buttonErase was set true or false
-buttonState(-bst)	string int string
Sets the state of a button. First argument specifies the layer, second argument specifies which button, third argument specifies the state Possible states: "buttonUp" - button is up "buttonDown" - button is down "buttonThirdState" - button is in state three (used by the "3StateButton" button style)
-buttonStyle(-bs)	string int string
Sets the type of button, used to indicate possible states and if the button is reset upon release. First argument specifies the layer, second argument specifies which button, third argument specifies the type of button Possible button types: "pushButton" - two possible states, button is reset to up upon release "2StateButton" - two possible states, button changes state on click "3StateButton" - three button states, button changes state on click
-buttonTextIcon(-bti)	string int string
Sets a one letter text to use as the icon to use for a specific button on a specific item. First argument specifies the item, second argument specifies the button, third argument specifies the icon text.
-buttonTooltip(-btp)	string int string
Sets a tooltip for specific button on a specific item. First argument specifies the item, second argument specifies the button, third argument specifies the tooltip.
-buttonTransparencyColor(-btc)	string int float float float
Sets the background color of a button that will be used if buttonTransparencyOverride is enabled. First argument specifies item, second argument specifies button, three floats specify RGB values, between 0 and 1.
-buttonTransparencyOverride(-bto)	string int boolean
Sets a button's background as being overridden or not. First argument specifies item, second argument specifies button, third argument specifies overridden or not.
-buttonVisible(-bvf)	string int boolean
Sets a button as visible or not. First Argument specifies item. Second Argument specifies a button. Third Argument specifies visible or not.
-children(-ch)	string
Query the children of an item. If the argument is null, all items will be returned. In query mode, this flag needs a value.
-clearSelection(-cs)
Clears all selected items.
-contextMenuCommand(-cmc)	script
Set the callback function to be invoked just before any attached context menu is shown. This can be used as a replacement to, or in addition to the postMenuCommand flag on the popupMenu command. The function should accept a string which will be the item that was clicked on (empty if no item was hit). The function should return true if the menu should be shown, false otherwise.
-defineTemplate(-dt)	string
Puts the command in a mode where any other flags and arguments are parsed and added to the command template specified in the argument. They will be used as default arguments in any subsequent invocations of the command when templateName is set as the current template.
-displayLabel(-dl)	string string
Set a label for the item that is different than the string that identifies the item. This label will be used in the display of the item. The first parameter specifies the item, the second specifies the display label.
-displayLabelSuffix(-dls)	string string
Set a suffix for the display label for the item. This suffix will not be shown when renaming the item in the tree view.
-docTag(-dtg)	string
Add a documentation flag to the control. The documentation flag has a directory structure. (e.g., -dt render/multiLister/createNode/material)
-dragAndDropCommand(-dad)	script
Sets the callback function to be invoked upon drag and drop of layers. the callback function should take as parameters: - a string array of the dropped items - a string array of the items previous parents - an integer array of the items previous indexes - a string for the item(s) new parent - an integer array for the item's new indexes - a string for the item that now comes before the dropped items - a string for the item that now comes after the dropped items
-dragCallback(-dgc)	script
Adds a callback that is called when the middle mouse button is pressed. The MEL version of the callback is of the form: global proc string[] callbackName(string $dragControl, int $x, int $y, int $mods) The proc returns a string array that is transferred to the drop site. By convention the first string in the array describes the user settable message type. Controls that are application defined drag sources may ignore the callback. $mods allows testing for the key modifiers CTRL and SHIFT. Possible values are 0 == No modifiers, 1 == SHIFT, 2 == CTRL, 3 == CTRL + SHIFT. In Python, it is similar, but there are two ways to specify the callback. The recommended way is to pass a Python function object as the argument. In that case, the Python callback should have the form: def callbackName( dragControl, x, y, modifiers ): The values of these arguments are the same as those for the MEL version above. The other way to specify the callback in Python is to specify a string to be executed. In that case, the string will have the values substituted into it via the standard Python format operator. The format values are passed in a dictionary with the keys "dragControl", "x", "y", "modifiers". The "dragControl" value is a string and the other values are integers (eg the callback string could be "print '%(dragControl)s %(x)d %(y)d %(modifiers)d'")
-dropCallback(-dpc)	script
Adds a callback that is called when a drag and drop operation is released above the drop site. The MEL version of the callback is of the form: global proc callbackName(string $dragControl, string $dropControl, string $msgs[], int $x, int $y, int $type) The proc receives a string array that is transferred from the drag source. The first string in the msgs array describes the user defined message type. Controls that are application defined drop sites may ignore the callback. $type can have values of 1 == Move, 2 == Copy, 3 == Link. In Python, it is similar, but there are two ways to specify the callback. The recommended way is to pass a Python function object as the argument. In that case, the Python callback should have the form: def pythonDropTest( dragControl, dropControl, messages, x, y, dragType ): The values of these arguments are the same as those for the MEL version above. The other way to specify the callback in Python is to specify a string to be executed. In that case, the string will have the values substituted into it via the standard Python format operator. The format values are passed in a dictionary with the keys "dragControl", "dropControl", "messages", "x", "y", "type". The "dragControl" value is a string and the other values are integers (eg the callback string could be "print '%(dragControl)s %(dropControl)s %(messages)r %(x)d %(y)d %(type)d'")
-editLabelCommand(-elc)	script
Set the callback function to be invoked when the user changes the name of an item by double clicking it in the UI. The callback should accept two string arguments: the item name and the new name. The item name refers to the name of the item and not the display label. The callback function should return a string. An empty string indicates that the rename operation was invalid and the control should revert to the original name. If the rename operation is valid the callback should return a string that identifies the item, possibly different from the new display name entered by the user.
-enable(-en)	boolean
The enable state of the control. By default, this flag is set to true and the control is enabled. Specify false and the control will appear dimmed or greyed-out indicating it is disabled.
-enableBackground(-ebg)	boolean
Enables the background color of the control.
-enableButton(-eb)	string int int
Sets a specific button on a specific item to being usable or not. First argument specifies the item, second argument specifies the button, third argument specifies on or off.
-enableKeyboardFocus(-ekf)	boolean
If enabled, the user can navigate to the control with the tab key and select values with the keyboard or mouse. This flag would typically be used to turn off focus support from controls that get it by default, like Edit and List controls. If disabled, text in text fields can still be selected with the mouse but cannot be copied (except on Linux when "Middle Click Paste" is enabled).
-enableKeys(-enk)	boolean
By default the treeview does not accept input from the keyboard. By enabling keyboard support The treeview will support up/down navigation using the up/down arrow keys.
-enableLabel(-enl)	string int
enables or disables the label of a tree view item from being displayed. The first parameter specifies the item, the second specifies on or off.
-exists(-ex)
Returns whether the specified object exists or not. Other flags are ignored.
-expandCollapseCommand(-ecc)	script
Set the callback function to be invoked upon hitting the expand/collapse button. The function should take as parameters: - a string for the item for which the expand/collapse button was hit - an integer for the state of expansion
-expandItem(-ei)	string boolean
Expands or collapses an item's children. First argument specifies the item, second argument specifies expanded or collapsed.
-flatButton(-fb)	int
Type of flat button to use.
-font(-fn)	string string
The first parameter specifies the item string for the TtreeViewNode in the TtreeNodeMap. The second string specifies the font for the text. Valid values are "boldLabelFont", "smallBoldLabelFont", "tinyBoldLabelFont", "plainLabelFont", "smallPlainLabelFont", "obliqueLabelFont", "smallObliqueLabelFont", "fixedWidthFont" and "smallFixedWidthFont".
-fontFace(-ff)	string int
Sets the font face used for the specified item's text: 0 for normal, 1 for bold, 2 for italic.
-fullPathName(-fpn)
Return the full path name of the widget, which includes all the parents.
-height(-h)	int
The height of the control. The control will attempt to be this size if it is not overruled by parent layout conditions.
-hideButtons(-hb)
Hides the buttons for an item in the tree view. Can only be used when adding the item to the tree with the "addItem" flag. Space for the buttons is left to make sure items still line up correctly under their parent.
-highlightColor(-hlc)	float float float
The highlight color of the control. The arguments correspond to the red, green, and blue color components. Each component ranges in value from 0.0 to 1.0.
-highlite(-hl)	string boolean
Sets an item as highlit. Highliting is shown by outlining the item. First parameter specifies the item, the second specifies the highliting or not.
-highliteColor(-hc)	string float float float
Sets the color an item's highlite will turn when highlite is enabled. first parameter specifies layer three float values specify RGB values, between 0 and 1.
-ignoreButtonClick(-ibc)	string int int
Sets a specific button on a specific item to ignore the button clicks First argument specifies the item ,second argument specifies the button, third argument specifies on or off
-image(-i)	string int string
Sets an image to use as the icon for the button. First argument specifies the item, second argument specifies the button, third argument specifies the image.
-insertItem(-ii)	string string int
Create and insert a tree view item to the tree view. First argument specifies the item's name, second argument specifies the item's parent (use an empty string to have it at the top level of the tree), third argument is the child's index position in the children list. An index less than or equal to 0 inserts as the first child, greater than or equal to the number of children inserts as last child.
-isItemExpanded(-iie)	string
Is the item in the tree view expanded. In query mode, this flag needs a value.
-isLeaf(-il)	string
Query whether an item is a leaf. In query mode, this flag needs a value.
-isObscured(-io)
Return whether the control can actually be seen by the user. The control will be obscured if its state is invisible, if it is blocked (entirely or partially) by some other control, if it or a parent layout is unmanaged, or if the control's window is invisible or iconified.
-item(-it)	string
Specify the item to query. Used with the flag "selectionColor" and "itemAnnotation". In query mode, this flag needs a value.
-itemAnnotation(-ia)	string string
Annotate the specified item with an extra string value. When used for query, this flag has no argument and needs to be used with the flag "item".
-itemDblClickCommand(-idc)	script
Set the callback function to be invoked when an item in the tree has been double clicked. The callback should accept one string, the display label of the item that was double clicked. If this callback is defined, it supersedes the normal item renaming behavior.
-itemDblClickCommand2(-dc2)	script
Set the callback function to be invoked when an item in the tree has been double clicked. This callback is similar to itemDblClickCommand(idc), but it accepts two strings: the name and the display label of the item that was double clicked. If this callback is defined, it supersedes the normal item renaming behavior
-itemExists(-iex)	string
Queries the existence of the specified Tree View item. In query mode, this flag needs a value.
-itemIndex(-idx)	string
Get the index for the specified item in the list of children of the item's parent. Index is 0-based. In query mode, this flag needs a value.
-itemParent(-ip)	string
If the specified item is a child, it returns the parent item. If the specified item is not a child it returns nothing. In query mode, this flag needs a value.
-itemRenamedCommand(-irc)	script
Set the callback function to be invoked when an item in the tree has been renamed. This occurs if there is a successful return of the command attached by "editLabelCommand" or unconditionally if there is no editLabelCommand. The callback should accept two strings, the old name and the new name of the item that was renamed.
-itemSelected(-isl)	string
Queries the item is currently selected or not. In query mode, this flag needs a value.
-itemVisible(-iv)	string boolean
Control the given item's visibility.
-labelBackgroundColor(-lbc)	string float float float
Set the background color for text label for a particular item in the tree. The first parameter specifies layer. Set (-1.0, -1.0, -1.0) to restore the background to the default of "transparent"
-manage(-m)	boolean
Manage state of the control. An unmanaged control is not visible, nor does it take up any screen real estate. All controls are created managed by default.
-noBackground(-nbg)	boolean
Clear/reset the control's background. Passing true means the background should not be drawn at all, false means the background should be drawn. The state of this flag is inherited by children of this control.
-numberOfButtons(-nb)	int
Specifies the number of buttons for items in the tree.
-numberOfPopupMenus(-npm)
Return the number of popup menus attached to this control.
-ornament(-or)	string int int int
Sets an item as having an ornament (a small colored circle), its on/off state, if it should have a dot, and its size. First Argument specifies item, second argument specifies on or off, third argument specifies dotted or not, fourth argument specifies radius (in pixels).
-ornamentColor(-orc)	string float float float
Sets the color an ornament will be draw with for the specified layer.
-parent(-p)	string
The parent layout for this control.
-popupMenuArray(-pma)
Return the names of all the popup menus attached to this control.
-pressCommand(-pc)	int script
Sets the callback function to be invoked upon clicking a treeView button. First argument specifies which treeView button. Second argument specifies the callback function to be executed the callback function should take as parameters: - a string for the clicked button's item - an int for the clicked button's state
-preventOverride(-po)	boolean
If true, this flag prevents overriding the control's attribute via the control's right mouse button menu.
-removeAll(-ra)
Removes all items from the tree view.
-removeItem(-ri)	string
Removes a tree view item from the tree view. If this item has children items, all children items are removed. First argument specifies the item's name.
-reverseTreeOrder(-rto)	boolean
Controls the order the tree will be drawn in (reversed if true).
-rightPressCommand(-rpc)	int script
Sets the callback function to be invoked upon right clicking a treeView button. First argument specifies which treeView button. Second argument specifies the callback function to be executed the callback function should take as parameters: - a string for the clicked button's item - an int for the clicked button's state
-select(-sl)	string int
Set selection on an element. The first parameter specifies the item, the second specifies on or off.
-selectCommand(-sc)	script
Set the callback function to be invoked when an item is selected or deselected in the tree. The function should accept one string argument and one integer argument: the item name and the select state respectively. If the function returns true, the select/deselect is considered valid and will occur normally, otherwise it will be disallowed. name and
-selectItem(-si)	string boolean
Sets an item's selected state. first argument specifies the item, second argument specifies selection status. When used for query without arguments, return all selected items in the treeview.
-selectionChangedCommand(-scc)	script
Set the callback function to be invoked when a complete selection operation triggered by the user has occurred successfully. The callback is invoked if the "selectCommand" callback has returned a non-empty value (or always there is no "selectCommand" callback). This differs from selectCommand in that a simple selection replacement will generate two callbacks with "selectCommand" (one for deselect of the old item and one for select of the new), whereas "selectionChangedCommand" will only be invoked once, after the selection is complete. The callback is not passed any parameters and does not need to return any value (i.e. It is simply a notification mechanism).
-selectionColor(-scl)	string float float float
Sets the color an item will turn to indicate that it is selected. first parameter specifies the item three float values specify RGB values, between 0 and 1. When used for query, this flag has no argument and needs to be used with the flag "item". It returns the color an item will become if it is selected.
-showItem(-shi)	string
Show the item. Scroll the list as necessary so that item is visible.
-statusBarMessage(-sbm)	string
Extra string to display in the status bar when the mouse is over the control.
-textColor(-tc)	string float float float
Sets the label's text color for the specified layer. first argument specifies layer. three float values specify RGB values, between 0 and 1.
-useTemplate(-ut)	string
Forces the command to use a command template other than the current one.
-verticalScrollPosition(-vsp)	int
The position of the vertical scrollbar.
-visible(-vis)	boolean
The visible state of the control. A control is created visible by default. Note that a control's actual appearance is also dependent on the visible state of its parent layout(s).
-visibleChangeCommand(-vcc)	script
Command that gets executed when visible state of the control changes.
-width(-w)	int
The width of the control. The control will attempt to be this size if it is not overruled by parent layout conditions.

Flag can appear in Create mode of command	Flag can appear in Edit mode of command
Flag can appear in Query mode of command	Flag can be used more than once in a command.

MEL examples

string $window = `window`;
string $layout = `formLayout`;

string $control = `treeView -parent $layout -numberOfButtons 3 -abr false`;

formLayout -e
			-attachForm  $control "top" 2
			-attachForm  $control "left" 2
			-attachForm  $control "bottom" 2
			-attachForm  $control "right" 2
		$layout;

showWindow $window;

treeView -edit -addItem "layer 1" "" $control;
treeView -edit -addItem "layer 2" "" $control;
treeView -edit -addItem "layer 3" "" $control;
treeView -edit -addItem "layer 4" "" $control;
treeView -edit -addItem "layer 5" "" $control;
treeView -edit -addItem "layer 6" "" $control;
treeView -edit -addItem "layer 7" "layer 2" $control;
treeView -edit -addItem "layer 8" "layer 2" $control;
treeView -edit -addItem "layer 9" "layer 2" $control;
treeView -edit -addItem "layer 10" "layer 8" $control;
treeView -edit -addItem "layer 11" "layer 8" $control;
treeView -edit -addItem "layer 12" "" $control;
treeView -edit -addItem "layer 13" "layer 10" $control;
treeView -edit -pressCommand 1 "pressCallBack" -pressCommand 2 "pressCallBack" -pressCommand 3 "pressCallBack" $control;
treeView -edit -selectCommand "selectCallBack" $control;


global proc pressCallBack(string $str, int $onoff)
{
	print("pressCallBack :- str = " + $str + " onoff = " + $onoff + "\n");
}


global proc int selectCallBack(string $str,int $onoff)
{
	print("selectCallBack :- str = " + $str + "onoff = " + $onoff + "\n");
	return 1;
}

treeView -edit -removeAll $control;