pymel.core.context.draggerContext

draggerContext(*args, **kwargs)

The draggerContext allows the user to program the behavior of the mouse or an equivalent dragging device in MEL.

Flags:

Long name (short name)		Argument Types	Properties
anchorPoint (ap)		float, float, float
	Anchor point (double array) where dragger was initially pressed.
button (bu)		int
	Returns the current mouse button (1,2,3).
currentStep (cs)		int
	Current step (press-drag-release sequence) for dragger context. When queried before first press event happened, returns 0.Flag can appear in Create mode of commandFlag can have multiple arguments, passed either as a tuple or a list.
cursor (cur)		unicode
	Cursor displayed while context is active. Valid values are: “default”, “hand”, “crossHair”, “dolly”, “track”, and “tumble”.
dragCommand (dc)		script
	Command called when mouse dragger is dragged.
dragPoint (dp)		float, float, float
	Drag point (double array) current position of dragger during drag.
drawString (ds)		unicode
	A string to be drawn at the current position of the pointer.
exists (ex)		bool
	Returns true or false depending upon whether the specified object exists. Other flags are ignored.
finalize (fnz)		script
	Command called when the tool is exited.
helpString (hs)		unicode
history (ch)		bool
	If this is a tool command, turn the construction history on for the tool in question.
holdCommand (hc)		script
	Command called when mouse dragger is held.
image1 (i1)		unicode
image2 (i2)		unicode
image3 (i3)		unicode
	Contexts support up to three icons that represent the tool associated with the context.
initialize (inz)		script
	Command called when the tool is entered.
modifier (mo)		unicode
	Returns the current modifier type: ctrl, alt or none.
name (n)		unicode
	If this is a tool command, name the tool appropriately.
plane (pl)		float, float, float
	Provide normal of projection plane (see -projection flag for details).
prePressCommand (ppc)		script
	Command called when mouse dragger is pressed. It is called before pressCommand, so it can be used for initialization of context.
pressCommand (pc)		script
	Command called when mouse dragger is pressed.
projection (pr)		unicode
	Sets current projection of drag point. Valid types are: viewPlaneproject to view planeobjectViewPlaneproject to object plane (parallel to view plane)objectPlaneproject to specified plane defined by object location and normal (default) 0,1,0planeproject to specified plane defined by origin and normal (default) 0,1,0sketchPlaneproject to sketch planexAxisproject to closest point on X axisyAxisproject to closest point on Y axiszAxisproject to closest point on Z axisboundingSphereproject to closest point on object sphere boundsboundingBoxproject to closest point on object bounding box
releaseCommand (rc)		script
	Command called when mouse dragger is released.
snapping (snp)		bool
	Enable/disable snapping for dragger context.
space (sp)		unicode
	Sets current space that coordinates are reported in. Types are: worldworld space (global)objectobject space (local)screenscreen space
stepsCount (sc)		int
	Number of steps (press-drag-release sequences) for dragger context. When combined with undoMode flag, several steps might be recorded as single undo action.
undoMode (um)		unicode
	Undo queue mode for the context actions. Acceptable values are: “all” default behaviour when every action that happens during dragger context activity is recorded as an individual undo chunk.”step” - all the actions that happen between each press and release are combined into one undo chunk.”sequence” - all the actions that happen between very first press and very last release are combined into single undo chunk. This works exactly the same as “step” for a single step dragger context.

Derived from mel command maya.cmds.draggerContext

Example:

import pymel.core as pm

import maya.cmds as cmds

# Procedure called on press
def SampleContextPress():
        pressPosition = pm.draggerContext( 'sampleContext', query=True, anchorPoint=True)
        print ("Press: " + str(pressPosition))

# Procedure called on drag
def SampleContextDrag():
        dragPosition = pm.draggerContext( 'sampleContext', query=True, dragPoint=True)
        button = pm.draggerContext( 'sampleContext', query=True, button=True)
        modifier = pm.draggerContext( 'sampleContext', query=True, modifier=True)
        print ("Drag: " + str(dragPosition) + "  Button is " + str(button) + "  Modifier is " + modifier + "\n")
        message = str(dragPosition[0]) + ", " + str(dragPosition[1])
        pm.draggerContext( 'sampleContext', edit=True, drawString=message)

# Define draggerContext with press and drag procedures
pm.draggerContext( 'sampleContext', pressCommand='SampleContextPress()', dragCommand='SampleContextDrag()', cursor='hand' );

# Set the tool to the sample context created
# Results can be observed by dragging mouse around main window
pm.setToolTo('sampleContext')