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. 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 First of three possible icons representing the tool associated with the context. image2 / i2 unicode Second of three possible icons representing the tool associated with the context. image3 / i3 unicode Third of three possible icons representing 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: alldefault 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 stepfor a single step dragger context.Flag can have multiple arguments, passed either as a tuple or a list. Derived from mel command maya.cmds.draggerContext
Example:
import pymel.core as pm # 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')