pymel.core.windows.formLayout¶

formLayout(*args, **kwargs)¶

This command creates a form layout control. A form layout allows absolute and relative positioning of the controls that are its immediate children. Controls have four edges: top, left, bottom and right. There are only two directions that children can be positioned in, right-left and up-down. The attach flags take the direction of an attachment from the argument that names the edge to attach (the second argument). Any or all edges of a child may be attached. There are six ways to attach them: Attach to Form - Attaches an edge to the relevant side of the form layout. Thus -attachForm button3 leftwill attach the left edge of the button to the left edge of the form.Attach to Opposite Side of Form - Attaches an edge relative to the furthest side of the form layout.Attach to Another Control - Attaches an edge to the closest edge of the other control named.Attach to Opposite Side of Another Control - Attaches an edge relative to the furthest side of another control.Attach to Position - Attaches an edge to a position on the form layout. The position is given as a fixed fraction of the -nd/numDivisions value and as this value defaults to 100 it is easiest to think of it as a percentage of the form’s size.Attach to Nothing - Attaches an edge to nothing. The size of the child control will determine this edge’s position.Each edge attachment may have an offset that acts to separate controls visually. There is no default positioning relationship so to have children appear in the form they must have at least one edge attached in each direction. Note:In the flag definitions the arguments follow these rules: controlmust be the name of an immediate child of the form layout.edgemust be one of top, left, bottom, or right.positionmay range from 0 to the number of divisions as specified with the -nd/numberOfDivisions flag and gives the fraction of the width of the form as a measurement. This normally means 0-100 so positionmay be thought of as a percentage.offsetis an integer value in pixels.These are multi-use flags so any number of attachments may be made in a single command. Note:Avoid making control attachments that form a loop in control dependencies. For example: window; string $form = formLayout; string $btn1 = button; string $btn2 = button; string $btn3 = button;formLayout -edit-attachControl $btn2 top2 $btn1-attachControl $btn3 top2 $btn2-attachControl $btn1 right2 $btn3 $form;showWindow; $btn2 is attached to $btn1, $btn3 is attached to $btn2, and $btn1 is attached to $btn3. Thus, the placement of $btn1 is dependent on the placement of $btn3, which is dependent on the placement of $btn2, which is dependent on the placement of $btn1. The last control attachment will have created a loop in the dependencies. To prevent runtime errors, Maya will ignore this attachment and instead issue a warning that a cyclical control attachment has been detected in the script.

Flags:

Long Name / Short Name		Argument Types	Properties
annotation / ann		unicode
	Annotate the control with an extra string value.
attachControl / ac		unicode, unicode, int, unicode
	Arguments are: control, edge, offset, control Valid edge values are: top| bottom| left| right. Attach a control to another control.
attachForm / af		unicode, unicode, int
	Arguments are: control, edge, offset. Valid edge values are: top| bottom| left| right. Attach the specified control to the form, offset by the specified amount.
attachNone / an		unicode, unicode
	Arguments are: control, edge Valid edge values are: top| bottom| left| right. Attach a control to nothing.
attachOppositeControl / aoc		unicode, unicode, int, unicode
	Arguments are: control, edge, offset, control Valid edge values are: top| bottom| left| right. Attach a control to the opposite side of another control.
attachOppositeForm / aof		unicode, unicode, int
	Arguments are: control, edge, offset. Valid edge values are: top| bottom| left| right. Attach a control to the opposite side of the form.
attachPosition / ap		unicode, unicode, int, int
	Arguments are: control, edge, offset, position Valid edge values are: top| bottom| left| right. Attach a control to a position in the form.
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.
childArray / ca		bool
	Returns a string array of the names of the layout’s immediate children.
defineTemplate / dt		unicode
	Puts the 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.
docTag / dtg		unicode
	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 dragControlvalue 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 dragControlvalue 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’
enable / en		bool
	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		bool
	Enables the background color of the control.
exists / ex		bool
	Returns whether the specified object exists or not. Other flags are ignored.
fullPathName / fpn		bool
	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.
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.
isObscured / io		bool
	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		bool
	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		bool
	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.
numberOfChildren / nch		bool
	Returns in an int the number of immediate children of the layout.
numberOfDivisions / nd		int
	Specify the number of horizontal and vertical divisions across the form. Value must be greater than 0.
numberOfPopupMenus / npm		bool
	Return the number of popup menus attached to this control.
parent / p		unicode
	The parent layout for this control.
popupMenuArray / pma		bool
	Return the names of all the popup menus attached to this control.
preventOverride / po		bool
	If true, this flag disallows overriding the control’s attribute via the control’s right mouse button menu.
useTemplate / ut		unicode
	Force the command to use a command template other than the current one.
visible / vis		bool
	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 have multiple arguments, passed either as a tuple or a list.

Derived from mel command maya.cmds.formLayout

Example:

import pymel.core as pm

window = pm.window()
form = pm.formLayout(numberOfDivisions=100)
b1 = pm.button()
b2 = pm.button()
column = pm.columnLayout()
pm.button()
# Result: ui.Button('window1|formLayout54|columnLayout35|button33') #
pm.button()
# Result: ui.Button('window1|formLayout54|columnLayout35|button34') #
pm.button()
# Result: ui.Button('window1|formLayout54|columnLayout35|button35') #

pm.formLayout( form, edit=True, attachForm=[(b1, 'top', 5), (b1, 'left', 5), (b2, 'left', 5), (b2, 'bottom', 5), (b2, 'right', 5), (column, 'top', 5), (column, 'right', 5) ], attachControl=[(b1, 'bottom', 5, b2), (column, 'bottom', 5, b2)], attachPosition=[(b1, 'right', 5, 75), (column, 'left', 0, 75)], attachNone=(b2, 'top') )
# Result: ui.FormLayout('window1|formLayout54') #

pm.showWindow( window )