---
title: "mouseUp(atPositionX:positionY:activePart:modifiers:forceUpdate:at:)"
framework: Professional Video Applications
role: symbol
role_heading: Instance Method
platforms: [fxplug 4.0+]
path: "professional_video_applications/fxonscreencontrol_v4/mouseup(atpositionx:positiony:activepart:modifiers:forceupdate:at:)"
---

# mouseUp(atPositionX:positionY:activePart:modifiers:forceUpdate:at:)

Provides information when the left mouse button is released.

## Declaration

```swift
func mouseUp(atPositionX mousePositionX: Double, positionY mousePositionY: Double, activePart: Int, modifiers: FxModifierKeys, forceUpdate: UnsafeMutablePointer<ObjCBool>!, at time: CMTime)
```

## Parameters

- `mousePositionX`: X position of the pointer (in drawingCoordinates space).
- `mousePositionY`: Y position of the pointer (in drawingCoordinates space).
- `activePart`: The active part of the control that currently contains the pointer.
- `modifiers`: The keyboard modifiers currently pressed.
- `forceUpdate`: Set to YES if the filter/generator associated with this control needs to be re-calculated; NO otherwise.
- `time`: The current time when the mouse button was released.

## Mentioned in

Adding onscreen controls to plug-ins Thread safety in plug-ins

## Discussion

Discussion Depending on the host application, the time value may be relative to the start of the timeline or to the start of the clip. See the header file FxPlug/FxHostCapabilities.h.

## See Also

### Instance Methods

- [drawOSC(withWidth:height:activePart:destinationImage:at:)](professional_video_applications/fxonscreencontrol_v4/drawosc(withwidth:height:activepart:destinationimage:at:).md)
- [drawingCoordinates()](professional_video_applications/fxonscreencontrol_v4/drawingcoordinates().md)
- [hitTestOSC(atMousePositionX:mousePositionY:activePart:at:)](professional_video_applications/fxonscreencontrol_v4/hittestosc(atmousepositionx:mousepositiony:activepart:at:).md)
- [keyDown(atPositionX:positionY:keyPressed:modifiers:forceUpdate:didHandle:at:)](professional_video_applications/fxonscreencontrol_v4/keydown(atpositionx:positiony:keypressed:modifiers:forceupdate:didhandle:at:).md)
- [keyUp(atPositionX:positionY:keyPressed:modifiers:forceUpdate:didHandle:at:)](professional_video_applications/fxonscreencontrol_v4/keyup(atpositionx:positiony:keypressed:modifiers:forceupdate:didhandle:at:).md)
- [mouseDown(atPositionX:positionY:activePart:modifiers:forceUpdate:at:)](professional_video_applications/fxonscreencontrol_v4/mousedown(atpositionx:positiony:activepart:modifiers:forceupdate:at:).md)
- [mouseDragged(atPositionX:positionY:activePart:modifiers:forceUpdate:at:)](professional_video_applications/fxonscreencontrol_v4/mousedragged(atpositionx:positiony:activepart:modifiers:forceupdate:at:).md)
- [mouseEntered(atPositionX:positionY:modifiers:forceUpdate:at:)](professional_video_applications/fxonscreencontrol_v4/mouseentered(atpositionx:positiony:modifiers:forceupdate:at:).md)
- [mouseExited(atPositionX:positionY:modifiers:forceUpdate:at:)](professional_video_applications/fxonscreencontrol_v4/mouseexited(atpositionx:positiony:modifiers:forceupdate:at:).md)
- [mouseMoved(atPositionX:positionY:activePart:modifiers:forceUpdate:at:)](professional_video_applications/fxonscreencontrol_v4/mousemoved(atpositionx:positiony:activepart:modifiers:forceupdate:at:).md)