pymel.core.windows.canvas¶

canvas(*args, **kwargs)¶

Creates a control capable of displaying a color swatch. This control can also accept a command to be called when the colour swatch is pressed by the user. Note: The -dgc/dragCallback and -dpc/dropCallback are not available for this control.

Flags:

Long Name / Short Name		Argument Types	Properties
annotation / ann		unicode
	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.
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.
hsvValue / hsv		float, float, float
	Three float values corresponding to the hue, saturation, and value color components, where the hue value ranges from 0.0 to 360.0 and the saturation and value components range 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.
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.
pressCommand / pc		script
	Command to be executed when there is a mouse press.
preventOverride / po		bool
	If true, this flag disallows overriding the control’s attribute via the control’s right mouse button menu.
rgbValue / rgb		float, float, float
	Three float values corresponding to the red, green, and blue color components, all of which range from 0.0 to 1.0.
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.canvas

Example:

import pymel.core as pm

pm.window()
# Result: ui.Window('window1') #
pm.columnLayout( rowSpacing=5 )
# Result: ui.ColumnLayout('window1|columnLayout11') #
pm.canvas( rgbValue=(0, 0, 1), width=100, height=20 )
# Result: ui.Canvas('window1|columnLayout11|canvas1') #
pm.canvas( hsvValue=(60, 1, 1), width=100, height=20 )
# Result: ui.Canvas('window1|columnLayout11|canvas2') #
pm.canvas( rgbValue=(1, 0, 1), width=100, height=20 )
# Result: ui.Canvas('window1|columnLayout11|canvas3') #
pm.showWindow()