pymel.core.windows.hudSlider

hudSlider(*args, **kwargs)

This command creates a Heads-up Display (HUD) slider control which is placed in a 2D inactive overlay plane on the 3D viewport. It is to be used to provide hands-on interaction designated by a user script. The HUD slider is derived from a generic HUD object and thus inherits a similar workflow. Although this command provides much of the same functionality as the headsUpDisplay command, it does not provide headsUpDisplay layout controls such as layoutVisibility, nextFreeBlock, lastOccupiedBlock, exists, remove, etc. To access that functionality, please use the headsUpDisplay command. This command is focused solely around the creation and management of HUD sliders. Similarly, all operations performed by this command are limited to HUDs that are sliders. The only mandatory flags, on creation are the section and block flags. Like the headsUpDisplay command, upon creation of a HUD slider, an ID number will be assigned to it. This can be used to remove the HUD slider via the headsUpDisplay command (-rid/removeID [int IDNumber]), if desired. Alternatively, the headsUpDisplay command can remove HUD objects via their position (section and block), or their unique name.

Flags:

Long name (short name)		Argument Types	Properties
allowOverlap (ao)		bool
	Sets the Heads-Up Display to be visible regardless of overlapping section widths/limitations (see -s/section flag description for more details).
block (b)		int
	Denotes the individual block that the HUD will reside in, within a section. Each section is composed of a single column of blocks. The total number of blocks contained within each section is variable. The number of blocks that will be visible within each section is dependent on the size of blocks contained in each section and the current size of the window. Blocks begin enumerating from 0 and flexibly increase based on need. For HUD sliders, the format differs from that of the standard HUD. The layout using parameters defined by the formatting flags listed below (eg. justify, padding, labelWidth, valueWidth) is shown below: __________________________________________________________________ | | | | | | | | | | P | J | LW | Slider | IP | SliderValue | J | P | |_____|_____|________|____________|______|_____________|_____|_____| P = Sub-block of width, padding J = Justification of the entire block LW = Sub-block of width, labelWidth Slider = Length of the slider SliderValue = Sub-block of width, valueWidth IP = Internal padding Block PositioningBlocks on the top section begin from the top edge of the main viewport, while the bottom section begins from the bottom edge. Blocks are dynamically removed from visibility from the midpoint of the viewport. So, a relatively large block number will not draw to the viewport. Lastly, there can be at most one HUD occupying a block at any time. Trying to position a HUD in an occupied block will result in an error. Keep this in mind when positioning the HUD.
blockAlignment (ba)		unicode
	Specifies the alignment of the block within its respective column. Available alignments are: center, leftand right. The default alignment is left.
blockSize (bs)		unicode
	Sets the height of each block. Available heights are: small, medium and large. In pixel measurements, each corresponds to a 20, 35 or 50 pixel height, respectively.
decimalPrecision (dp)		int
	Sets the decimal precision of any floating point value returned by the command. The valid range of precision values are 1 to 8.
dragCommand (dc)		callable
	Specifies the procedure or script to run during a mouse drag event.
internalPadding (ip)		int
	Specifies the amount of padding between the internal elements of the HUD. For the hudSlider, this represents the padding between the slider bar and the slider value. The default padding is 10.
label (l)		unicode
	Text label of the HUD.
labelFontSize (lfs)		unicode
	Sets the font size of the label. Available sizes are: small and large.
labelWidth (lw)		int
	Specifies the pixel width of the virtual textboxwhich will hold the label. The contents of this textboxwill be left justified. If the width of the actual label exceeds the width of the textbox,the label will be truncated to fit within the dimensions of the textbox.(To see a layout of a block, see the description of the -block flag.)
maxValue (max)		float
	Specify the maximum value of the slider. Note:Although this flag takes in a FLOAT as an argument, if the HUD type is int, the value will be automatically converted internally to an integer.
minValue (min)		float
	Specify the minimum value of the slider. Note:Although this flag takes in a FLOAT as an argument, if the HUD type is int, the value will be automatically converted internally to an integer.
padding (p)		int
	Specifies the width of both the left and right margins of a block. Default value is 15 pixels.
pressCommand (pc)		callable
	Specifies the procedure or script to run during a mouse click event.
releaseCommand (rc)		callable
	Specifies the procedure or script to run during a mouse release event. Flag can have multiple arguments, passed either as a tuple or a list.
section (s)		int
	Defines the section the HUD will appear in. There are 10 sections divided across the screen. Five columns and two rows make up the ten element matrix which divide the main viewport. Here is a visual layout of the sections. ________________________ | | | | | | | | | | | | | 0 | 1 | 2 | 3 | 4 | | | | | | | |____|____|____|____|____| | | | | | | | | | | | | | 5 | 6 | 7 | 8 | 9 | | | | | | | |____|____|____|____|____|Each section is denoted by a number from 0 to 9 as illustrated above. For example, if the second column of the top row was desired, the section would be defined as: -sec 1 To prevent HUD objects from displaying over each other and causing a clutter of letters, each row has a defined visibility precedence, where each section would have a visibility priority level. Depending on each priority level, when the screen space begins to shrink to a point where the section widths of a given row begin to collide, the HUD automatically compensates for this by removing the sections of least priority. These sections are made invisible and a warning is issued to inform the user of the removal. This continues until only the section of highest priority remains. For each row, the priorities are defined as follows. Using the top row as an example: Section 0, has the highest priority, followed by Section 4, making the outermost sections of highest priority. Next in the list is Section 2, and lastly Sections 1 and 3 are of the equal and least priority. This priority structure can be applied to the bottom row as well. The two outermost sections have the highest priority, followed by the middle section, and finally the remaining two sections are of lowest priority. This means that as the viewport gradually decreases in width to the point where sections in the top row begin to overlap, sections 1 and 3 will be removed from view first, followed by section 2, and finally section 4. A similar note is provided below for the block layout.
sliderIncrement (si)		float
	Specify the number of increments along the slider. If not specified or set to 0 or less, the slider will be linearly even and continuous from minValue to maxValue. Note:Although this flag takes in a FLOAT as an argument, if the HUD type is int, the value will be automatically converted internally to an integer.
sliderLength (sl)		int
	Specifies the length of the slider in pixels.
type (t)		unicode
	Specify the numeric type of the HUD. Available types are: floatand int.
value (v)		float
	Set/Return the slider value if the HUD is a valid HUD slider. Note:Although this flag takes in a FLOAT as an argument, if the HUD type is int, the value will be automatically converted internally to an integer.
valueAlignment (va)		unicode
	Specifies the alignment of the data blocks and the data text, within a HUD block. Available alignments are: leftand right. The default alignment is left.
valueFontSize (vfs)		unicode
	Sets the font size of the slider value. Available sizes are: small and large.
valueWidth (vw)		int
	Specifies the pixel width of the virtual textboxwhich will hold the slider value. (To see a layout of a block, see the description of the -block flag.)
visible (vis)		bool
	Sets the visibility of the Heads-Up Display on and off.

Derived from mel command maya.cmds.hudSlider

Example:

import pymel.core as pm

# Define a procedure to execute on press/drag/release. This procedure
# will explicitly set any selected transforms to a given position along
# the X axis based on the value of a given HUD slider.
#
def translateXSlider( HUD ):
    # Since undo is not turned off automatically, we must
    # do it ourselves. The HUD will fire off many calls to this
    # procedure during a drag so we don't want to flood the undo
    # queue.
    pm.undoInfo( swf=False )
    for object in pm.ls( sl=True ):
            if pm.objectType( object, isType='transform' ):
               translateX = object + '.tx'
               value = pm.hudSlider( HUD, q=True, v=True )
               pm.setAttr( translateX, value )
    # Re-enable the undo queue.
    #
    pm.undoInfo( swf=True)
# Now create our slider HUD
#
pm.hudSlider( 'HUDTranslateXSlider',
                            section=2,
                            block=5,
                            visible=1,
                            label="TranslateX:",
                            value=0,
                            type="int",
                            minValue=-10,
                            maxValue=10,
                            labelWidth=80,
                            valueWidth=50,
                            sliderLength=100,
                            sliderIncrement=1,
                            pressCommand='translateXSlider( "HUDTranslateXSlider" )',
                            dragCommand='translateXSlider( "HUDTranslateXSlider" )',
                            releaseCommand='translateXSlider( "HUDTranslateXSlider" )')