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blockly > dragging > Dragger
dragging.Dragger class
Signature:
export declare class Dragger implements IDragger
Implements: IDragger
Constructors
Properties
Methods
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Last updated 2025-05-16 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-05-16 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eDragger\u003c/code\u003e class in Blockly manages the dragging behavior of elements within a workspace.\u003c/p\u003e\n"],["\u003cp\u003eIt implements the \u003ccode\u003eIDragger\u003c/code\u003e interface and provides methods for handling drag start, drag, and drag end events.\u003c/p\u003e\n"],["\u003cp\u003eDragger calculates element positions during dragging, updates the drag target, and determines if the draggable should return to its starting position or be deleted.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can extend or customize this class to modify the drag-and-drop functionality in Blockly applications.\u003c/p\u003e\n"]]],[],null,["[blockly](./blockly.md) \\\u003e [dragging](./blockly.dragging_namespace.md) \\\u003e [Dragger](./blockly.dragging_namespace.dragger_class.md)\n\ndragging.Dragger class\n----------------------\n\n**Signature:** \n\n export declare class Dragger implements IDragger \n\n**Implements:** [IDragger](./blockly.idragger_interface.md)\n\nConstructors\n------------\n\n| Constructor | Modifiers | Description |\n|------------------------------------------------------------------------------------------------------------------|-----------|--------------------------------------------------|\n| [(constructor)(draggable, workspace)](./blockly.dragging_namespace.dragger_class._constructor__1_constructor.md) | | Constructs a new instance of the `Dragger` class |\n\nProperties\n----------\n\n| Property | Modifiers | Type | Description |\n|---------------------------------------------------------------------------------|-------------|-------------------------------------------------------------|-------------|\n| [draggable](./blockly.dragging_namespace.dragger_class.draggable_property.md) | `protected` | [IDraggable](./blockly.idraggable_interface.md) | |\n| [dragTarget](./blockly.dragging_namespace.dragger_class.dragtarget_property.md) | `protected` | [IDragTarget](./blockly.idragtarget_interface.md) \\| null | |\n| [startLoc](./blockly.dragging_namespace.dragger_class.startloc_property.md) | `protected` | [Coordinate](./blockly.utils_namespace.coordinate_class.md) | |\n| [workspace](./blockly.dragging_namespace.dragger_class.workspace_property.md) | `protected` | [WorkspaceSvg](./blockly.workspacesvg_class.md) | |\n\nMethods\n-------\n\n| Method | Modifiers | Description |\n|-----------------------------------------------------------------------------------------------------------------------|-------------|-------------------------------------------------------------------------------------------------|\n| [onDrag(e, totalDelta)](./blockly.dragging_namespace.dragger_class.ondrag_1_method.md) | | Handles calculating where the element should actually be moved to. |\n| [onDragEnd(e)](./blockly.dragging_namespace.dragger_class.ondragend_1_method.md) | | Handles any drag cleanup. |\n| [onDragStart(e)](./blockly.dragging_namespace.dragger_class.ondragstart_1_method.md) | | Handles any drag startup. |\n| [pixelsToWorkspaceUnits(pixelCoord)](./blockly.dragging_namespace.dragger_class.pixelstoworkspaceunits_1_method.md) | `protected` | |\n| [shouldReturnToStart(e, rootDraggable)](./blockly.dragging_namespace.dragger_class.shouldreturntostart_1_method.md) | `protected` | Returns true if we should return the draggable to its original location at the end of the drag. |\n| [updateDragTarget(e)](./blockly.dragging_namespace.dragger_class.updatedragtarget_1_method.md) | `protected` | Updates the drag target under the pointer (if there is one). |\n| [wouldDeleteDraggable(e, rootDraggable)](./blockly.dragging_namespace.dragger_class.woulddeletedraggable_1_method.md) | `protected` | Returns true if we would delete the draggable if it was dropped at the current location. |"]]
