treeView

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Synopsis

treeView [-addItem string string] [-allowDragAndDrop boolean] [-allowHiddenParents boolean] [-allowReparenting boolean] [-annotation string] [-attachButtonRight int] [-backgroundColor float float float] [-borderHighlite string boolean] [-borderHighliteColor string float float float] [-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] [-enableKeys boolean] [-enableLabel string int] [-exists] [-expandCollapseCommand script] [-expandItem string boolean] [-font string string] [-fontFace string int] [-fullPathName string] [-height int] [-hideButtons] [-highlite string boolean] [-highliteColor string float float float] [-image string int string] [-isItemExpanded string] [-isLeaf string] [-isObscured] [-itemDblClickCommand script] [-itemExists string] [-itemIndex string] [-itemParent string] [-itemRenamedCommand script] [-itemSelected string] [-itemVisible string boolean] [-labelBackgroundColor string float float float] [-manage boolean] [-numberOfButtons int] [-numberOfPopupMenus] [-ornament string int int int] [-ornamentColor string float float float] [-parent string] [-popupMenuArray] [-pressCommand int script] [-preventOverride boolean] [-removeAll] [-reverseTreeOrder boolean] [-rightPressCommand int script] [-selectCommand script] [-selectItem string boolean] [-selectionChangedCommand script] [-selectionColor string float float float] [-showItem int] [-textColor string float float float] [-useTemplate string] [-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
-exists(-ex)
Returns true|false depending upon whether the specified object exists. Other flags are ignored.
-defineTemplate(-dt)	string
Puts a command in a mode where any other flags and args 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.
-useTemplate(-ut)	string
Force the command to use a command template other than the current one.
-parent(-p)	string
The parent layout for this control.
-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.
-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.
-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.
-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.
-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.
-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.
-numberOfPopupMenus(-npm)
Return the number of popup menus attached to this control.
-popupMenuArray(-pma)
Return the names of all the popup menus attached to this control.
-preventOverride(-po)	boolean
If true, this flag disallows overriding the control's attribute via the control's right mouse button menu.
-annotation(-ann)	string
Annotate the control with an extra string value.
-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.
-enableBackground(-ebg)	boolean
Enables the background color of the control.
-docTag(-dtg)	string
Add a documentation flag to the control. The documentation flag has a directory structure like hierarchy. Eg. -dt render/multiLister/createNode/material
-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 CTL and SHIFT. Possible values are 0 == No modifiers, 1 == SHIFT, 2 == CTL, 3 == CTL + 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'")
-fullPathName(-fpn)	string
Return the full path name of the widget, which includes all the parents
-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".
-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"
-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.
-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.
-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.
-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.
-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.
-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.
-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 name of the item that was double clicked. If this callback is defined, it supersedes the normal item renaming behavior.
-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
-selectionChangedCommand( -scc)	script
Set the callback function to be invoked when a complete selection operation triggered by the user has occured successfully. The callback is invoked if the "selectCommand" callback has returned a non-empy value (or always there is no "selectCommand" callback). This differs from selectCommand in that a simple selection replacement will generate two calbacks 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 (ie. It is simply a notification mechanism).
-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.
-isItemExpanded(-iie)	string
Is the item in the tree view expanded. In query mode, this flag needs a value.
-numberOfButtons(-nb)	int
Specifies the number of buttons for items in the tree.
-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.
-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.
-itemExists(-iex)	string
Queries the existence of the specified Tree View item. In query mode, this flag needs a value.
-itemSelected(-isl)	string
Queries the item is currently selected or not. 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.
-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.
-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.
-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.
-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.
-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
-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)
-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.
-expandCollapseCommand(-ecc)	script
Set the callback function to be invoked upon hitting the expand/collapse button. The function should take as paramaters: - a string for the item for which the expand/collapse button was hit - an integer for the state of expansion
-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
-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.
-selectItem(-si)	string boolean
Sets an item's selected state. first argument specifies the item, second argument specifies selection status
-clearSelection(-cs)
Clears all selected items.
-selectionColor(-scl)	string float float float
Sets the color an item will turn to indicate that it is selected. first paramater specifies the item three float values specify RGB values, between 0 and 1.
-highlite(-hl)	string boolean
Sets an item as highlited. Highliting is shown by outlining the item. First paramater 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 paramater specifies layer three float values specify RGB values, between 0 and 1.
-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)
-removeAll(-ra)
Removes all items from the tree view.
-expandItem(-ei)	string boolean
Expands or collapses an item's children. First argument specifies the item, second argument specifies expanded or collapsed.
-borderHighlite(-bh)	string boolean
Sets an item's border as highlited 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 paramater specifies layer three float values specify RGB values, between 0 and 1.
-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.
-reverseTreeOrder(-rto)	boolean
Controls the order the tree will be drawn in (reversed if true).
-fontFace(-ff)	string int
Sets the font face used for the specified item's text: 0 for normal, 1 for bold, 2 for italic.
-itemVisible(-iv)	string boolean
Control the given item's visibility.
-buttonTransparencyOverride( -bto)	string int boolean
Sets a button's background as being overriden or not. First argument specifies item, second argument specifies button, third argument specifies overridden or not.
-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.
-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
-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
-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.
-isLeaf(-il)	string
Query whether an item is a leaf. In query mode, this flag needs a value.
-showItem(-shi)	int
Show the item. Scroll the list as necessary so that item is visible.
-allowHiddenParents(-ahp)	boolean
If not cleared(default), the treeView will make parent nodes of visibles nodes automatically visible

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 $index,int $onoff)
{
        print("str = " + $str + " index = " + $index + "onoff = " + $onoff + "\n");
}


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

treeView -edit -removeAll $control;