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+/**
+ * $Id: mxGraphHandler.js,v 1.129 2012-04-13 12:53:30 gaudenz Exp $
+ * Copyright (c) 2006-2010, JGraph Ltd
+ */
+/**
+ * Class: mxGraphHandler
+ *
+ * Graph event handler that handles selection. Individual cells are handled
+ * separately using <mxVertexHandler> or one of the edge handlers. These
+ * handlers are created using <mxGraph.createHandler> in
+ * <mxGraphSelectionModel.cellAdded>.
+ *
+ * To avoid the container to scroll a moved cell into view, set
+ * <scrollAfterMove> to false.
+ *
+ * Constructor: mxGraphHandler
+ *
+ * Constructs an event handler that creates handles for the
+ * selection cells.
+ *
+ * Parameters:
+ *
+ * graph - Reference to the enclosing <mxGraph>.
+ */
+function mxGraphHandler(graph)
+{
+ this.graph = graph;
+ this.graph.addMouseListener(this);
+
+ // Repaints the handler after autoscroll
+ this.panHandler = mxUtils.bind(this, function()
+ {
+ this.updatePreviewShape();
+ });
+
+ this.graph.addListener(mxEvent.PAN, this.panHandler);
+};
+
+/**
+ * Variable: graph
+ *
+ * Reference to the enclosing <mxGraph>.
+ */
+mxGraphHandler.prototype.graph = null;
+
+/**
+ * Variable: maxCells
+ *
+ * Defines the maximum number of cells to paint subhandles
+ * for. Default is 50 for Firefox and 20 for IE. Set this
+ * to 0 if you want an unlimited number of handles to be
+ * displayed. This is only recommended if the number of
+ * cells in the graph is limited to a small number, eg.
+ * 500.
+ */
+mxGraphHandler.prototype.maxCells = (mxClient.IS_IE) ? 20 : 50;
+
+/**
+ * Variable: enabled
+ *
+ * Specifies if events are handled. Default is true.
+ */
+mxGraphHandler.prototype.enabled = true;
+
+/**
+ * Variable: highlightEnabled
+ *
+ * Specifies if drop targets under the mouse should be enabled. Default is
+ * true.
+ */
+mxGraphHandler.prototype.highlightEnabled = true;
+
+/**
+ * Variable: cloneEnabled
+ *
+ * Specifies if cloning by control-drag is enabled. Default is true.
+ */
+mxGraphHandler.prototype.cloneEnabled = true;
+
+/**
+ * Variable: moveEnabled
+ *
+ * Specifies if moving is enabled. Default is true.
+ */
+mxGraphHandler.prototype.moveEnabled = true;
+
+/**
+ * Variable: guidesEnabled
+ *
+ * Specifies if other cells should be used for snapping the right, center or
+ * left side of the current selection. Default is false.
+ */
+mxGraphHandler.prototype.guidesEnabled = false;
+
+/**
+ * Variable: guide
+ *
+ * Holds the <mxGuide> instance that is used for alignment.
+ */
+mxGraphHandler.prototype.guide = null;
+
+/**
+ * Variable: currentDx
+ *
+ * Stores the x-coordinate of the current mouse move.
+ */
+mxGraphHandler.prototype.currentDx = null;
+
+/**
+ * Variable: currentDy
+ *
+ * Stores the y-coordinate of the current mouse move.
+ */
+mxGraphHandler.prototype.currentDy = null;
+
+/**
+ * Variable: updateCursor
+ *
+ * Specifies if a move cursor should be shown if the mouse is ove a movable
+ * cell. Default is true.
+ */
+mxGraphHandler.prototype.updateCursor = true;
+
+/**
+ * Variable: selectEnabled
+ *
+ * Specifies if selecting is enabled. Default is true.
+ */
+mxGraphHandler.prototype.selectEnabled = true;
+
+/**
+ * Variable: removeCellsFromParent
+ *
+ * Specifies if cells may be moved out of their parents. Default is true.
+ */
+mxGraphHandler.prototype.removeCellsFromParent = true;
+
+/**
+ * Variable: connectOnDrop
+ *
+ * Specifies if drop events are interpreted as new connections if no other
+ * drop action is defined. Default is false.
+ */
+mxGraphHandler.prototype.connectOnDrop = false;
+
+/**
+ * Variable: scrollOnMove
+ *
+ * Specifies if the view should be scrolled so that a moved cell is
+ * visible. Default is true.
+ */
+mxGraphHandler.prototype.scrollOnMove = true;
+
+/**
+ * Variable: minimumSize
+ *
+ * Specifies the minimum number of pixels for the width and height of a
+ * selection border. Default is 6.
+ */
+mxGraphHandler.prototype.minimumSize = 6;
+
+/**
+ * Variable: previewColor
+ *
+ * Specifies the color of the preview shape. Default is black.
+ */
+mxGraphHandler.prototype.previewColor = 'black';
+
+/**
+ * Variable: htmlPreview
+ *
+ * Specifies if the graph container should be used for preview. If this is used
+ * then drop target detection relies entirely on <mxGraph.getCellAt> because
+ * the HTML preview does not "let events through". Default is false.
+ */
+mxGraphHandler.prototype.htmlPreview = false;
+
+/**
+ * Variable: shape
+ *
+ * Reference to the <mxShape> that represents the preview.
+ */
+mxGraphHandler.prototype.shape = null;
+
+/**
+ * Variable: scaleGrid
+ *
+ * Specifies if the grid should be scaled. Default is false.
+ */
+mxGraphHandler.prototype.scaleGrid = false;
+
+/**
+ * Variable: crisp
+ *
+ * Specifies if the move preview should be rendered in crisp mode if applicable.
+ * Default is true.
+ */
+mxGraphHandler.prototype.crisp = true;
+
+/**
+ * Function: isEnabled
+ *
+ * Returns <enabled>.
+ */
+mxGraphHandler.prototype.isEnabled = function()
+{
+ return this.enabled;
+};
+
+/**
+ * Function: setEnabled
+ *
+ * Sets <enabled>.
+ */
+mxGraphHandler.prototype.setEnabled = function(value)
+{
+ this.enabled = value;
+};
+
+/**
+ * Function: isCloneEnabled
+ *
+ * Returns <cloneEnabled>.
+ */
+mxGraphHandler.prototype.isCloneEnabled = function()
+{
+ return this.cloneEnabled;
+};
+
+/**
+ * Function: setCloneEnabled
+ *
+ * Sets <cloneEnabled>.
+ *
+ * Parameters:
+ *
+ * value - Boolean that specifies the new clone enabled state.
+ */
+mxGraphHandler.prototype.setCloneEnabled = function(value)
+{
+ this.cloneEnabled = value;
+};
+
+/**
+ * Function: isMoveEnabled
+ *
+ * Returns <moveEnabled>.
+ */
+mxGraphHandler.prototype.isMoveEnabled = function()
+{
+ return this.moveEnabled;
+};
+
+/**
+ * Function: setMoveEnabled
+ *
+ * Sets <moveEnabled>.
+ */
+mxGraphHandler.prototype.setMoveEnabled = function(value)
+{
+ this.moveEnabled = value;
+};
+
+/**
+ * Function: isSelectEnabled
+ *
+ * Returns <selectEnabled>.
+ */
+mxGraphHandler.prototype.isSelectEnabled = function()
+{
+ return this.selectEnabled;
+};
+
+/**
+ * Function: setSelectEnabled
+ *
+ * Sets <selectEnabled>.
+ */
+mxGraphHandler.prototype.setSelectEnabled = function(value)
+{
+ this.selectEnabled = value;
+};
+
+/**
+ * Function: isRemoveCellsFromParent
+ *
+ * Returns <removeCellsFromParent>.
+ */
+mxGraphHandler.prototype.isRemoveCellsFromParent = function()
+{
+ return this.removeCellsFromParent;
+};
+
+/**
+ * Function: setRemoveCellsFromParent
+ *
+ * Sets <removeCellsFromParent>.
+ */
+mxGraphHandler.prototype.setRemoveCellsFromParent = function(value)
+{
+ this.removeCellsFromParent = value;
+};
+
+/**
+ * Function: getInitialCellForEvent
+ *
+ * Hook to return initial cell for the given event.
+ */
+mxGraphHandler.prototype.getInitialCellForEvent = function(me)
+{
+ return me.getCell();
+};
+
+/**
+ * Function: isDelayedSelection
+ *
+ * Hook to return true for delayed selections.
+ */
+mxGraphHandler.prototype.isDelayedSelection = function(cell)
+{
+ return this.graph.isCellSelected(cell);
+};
+
+/**
+ * Function: mouseDown
+ *
+ * Handles the event by selecing the given cell and creating a handle for
+ * it. By consuming the event all subsequent events of the gesture are
+ * redirected to this handler.
+ */
+mxGraphHandler.prototype.mouseDown = function(sender, me)
+{
+ if (!me.isConsumed() && this.isEnabled() && this.graph.isEnabled() &&
+ !this.graph.isForceMarqueeEvent(me.getEvent()) && me.getState() != null)
+ {
+ var cell = this.getInitialCellForEvent(me);
+ this.cell = null;
+ this.delayedSelection = this.isDelayedSelection(cell);
+
+ if (this.isSelectEnabled() && !this.delayedSelection)
+ {
+ this.graph.selectCellForEvent(cell, me.getEvent());
+ }
+
+ if (this.isMoveEnabled())
+ {
+ var model = this.graph.model;
+ var geo = model.getGeometry(cell);
+
+ if (this.graph.isCellMovable(cell) && ((!model.isEdge(cell) || this.graph.getSelectionCount() > 1 ||
+ (geo.points != null && geo.points.length > 0) || model.getTerminal(cell, true) == null ||
+ model.getTerminal(cell, false) == null) || this.graph.allowDanglingEdges ||
+ (this.graph.isCloneEvent(me.getEvent()) && this.graph.isCellsCloneable())))
+ {
+ this.start(cell, me.getX(), me.getY());
+ }
+
+ this.cellWasClicked = true;
+
+ // Workaround for SELECT element not working in Webkit, this blocks moving
+ // of the cell if the select element is clicked in Safari which is needed
+ // because Safari doesn't seem to route the subsequent mouseUp event via
+ // this handler which leads to an inconsistent state (no reset called).
+ // Same for cellWasClicked which will block clearing the selection when
+ // clicking the background after clicking on the SELECT element in Safari.
+ if ((!mxClient.IS_SF && !mxClient.IS_GC) || me.getSource().nodeName != 'SELECT')
+ {
+ me.consume();
+ }
+ else if (mxClient.IS_SF && me.getSource().nodeName == 'SELECT')
+ {
+ this.cellWasClicked = false;
+ this.first = null;
+ }
+ }
+ }
+};
+
+/**
+ * Function: getGuideStates
+ *
+ * Creates an array of cell states which should be used as guides.
+ */
+mxGraphHandler.prototype.getGuideStates = function()
+{
+ var parent = this.graph.getDefaultParent();
+ var model = this.graph.getModel();
+
+ var filter = mxUtils.bind(this, function(cell)
+ {
+ return this.graph.view.getState(cell) != null &&
+ model.isVertex(cell) &&
+ model.getGeometry(cell) != null &&
+ !model.getGeometry(cell).relative;
+ });
+
+ return this.graph.view.getCellStates(model.filterDescendants(filter, parent));
+};
+
+/**
+ * Function: getCells
+ *
+ * Returns the cells to be modified by this handler. This implementation
+ * returns all selection cells that are movable, or the given initial cell if
+ * the given cell is not selected and movable. This handles the case of moving
+ * unselectable or unselected cells.
+ *
+ * Parameters:
+ *
+ * initialCell - <mxCell> that triggered this handler.
+ */
+mxGraphHandler.prototype.getCells = function(initialCell)
+{
+ if (!this.delayedSelection && this.graph.isCellMovable(initialCell))
+ {
+ return [initialCell];
+ }
+ else
+ {
+ return this.graph.getMovableCells(this.graph.getSelectionCells());
+ }
+};
+
+/**
+ * Function: getPreviewBounds
+ *
+ * Returns the <mxRectangle> used as the preview bounds for
+ * moving the given cells.
+ */
+mxGraphHandler.prototype.getPreviewBounds = function(cells)
+{
+ var bounds = this.graph.getView().getBounds(cells);
+
+ if (bounds != null)
+ {
+ if (bounds.width < this.minimumSize)
+ {
+ var dx = this.minimumSize - bounds.width;
+ bounds.x -= dx / 2;
+ bounds.width = this.minimumSize;
+ }
+
+ if (bounds.height < this.minimumSize)
+ {
+ var dy = this.minimumSize - bounds.height;
+ bounds.y -= dy / 2;
+ bounds.height = this.minimumSize;
+ }
+ }
+
+ return bounds;
+};
+
+/**
+ * Function: createPreviewShape
+ *
+ * Creates the shape used to draw the preview for the given bounds.
+ */
+mxGraphHandler.prototype.createPreviewShape = function(bounds)
+{
+ var shape = new mxRectangleShape(bounds, null, this.previewColor);
+ shape.isDashed = true;
+ shape.crisp = this.crisp;
+
+ if (this.htmlPreview)
+ {
+ shape.dialect = mxConstants.DIALECT_STRICTHTML;
+ shape.init(this.graph.container);
+ }
+ else
+ {
+ // Makes sure to use either VML or SVG shapes in order to implement
+ // event-transparency on the background area of the rectangle since
+ // HTML shapes do not let mouseevents through even when transparent
+ shape.dialect = (this.graph.dialect != mxConstants.DIALECT_SVG) ?
+ mxConstants.DIALECT_VML : mxConstants.DIALECT_SVG;
+ shape.init(this.graph.getView().getOverlayPane());
+
+ // Event-transparency
+ if (shape.dialect == mxConstants.DIALECT_SVG)
+ {
+ shape.node.setAttribute('style', 'pointer-events:none;');
+ }
+ else
+ {
+ shape.node.style.background = '';
+ }
+ }
+
+ return shape;
+};
+
+/**
+ * Function: start
+ *
+ * Starts the handling of the mouse gesture.
+ */
+mxGraphHandler.prototype.start = function(cell, x, y)
+{
+ this.cell = cell;
+ this.first = mxUtils.convertPoint(this.graph.container, x, y);
+ this.cells = this.getCells(this.cell);
+ this.bounds = this.getPreviewBounds(this.cells);
+
+ if (this.guidesEnabled)
+ {
+ this.guide = new mxGuide(this.graph, this.getGuideStates());
+ }
+};
+
+/**
+ * Function: useGuidesForEvent
+ *
+ * Returns true if the guides should be used for the given <mxMouseEvent>.
+ * This implementation returns <mxGuide.isEnabledForEvent>.
+ */
+mxGraphHandler.prototype.useGuidesForEvent = function(me)
+{
+ return (this.guide != null) ? this.guide.isEnabledForEvent(me.getEvent()) : true;
+};
+
+
+/**
+ * Function: snap
+ *
+ * Snaps the given vector to the grid and returns the given mxPoint instance.
+ */
+mxGraphHandler.prototype.snap = function(vector)
+{
+ var scale = (this.scaleGrid) ? this.graph.view.scale : 1;
+
+ vector.x = this.graph.snap(vector.x / scale) * scale;
+ vector.y = this.graph.snap(vector.y / scale) * scale;
+
+ return vector;
+};
+
+/**
+ * Function: mouseMove
+ *
+ * Handles the event by highlighting possible drop targets and updating the
+ * preview.
+ */
+mxGraphHandler.prototype.mouseMove = function(sender, me)
+{
+ var graph = this.graph;
+
+ if (!me.isConsumed() && graph.isMouseDown && this.cell != null &&
+ this.first != null && this.bounds != null)
+ {
+ var point = mxUtils.convertPoint(graph.container, me.getX(), me.getY());
+ var dx = point.x - this.first.x;
+ var dy = point.y - this.first.y;
+ var tol = graph.tolerance;
+
+ if (this.shape!= null || Math.abs(dx) > tol || Math.abs(dy) > tol)
+ {
+ // Highlight is used for highlighting drop targets
+ if (this.highlight == null)
+ {
+ this.highlight = new mxCellHighlight(this.graph,
+ mxConstants.DROP_TARGET_COLOR, 3);
+ }
+
+ if (this.shape == null)
+ {
+ this.shape = this.createPreviewShape(this.bounds);
+ }
+
+ var gridEnabled = graph.isGridEnabledEvent(me.getEvent());
+ var hideGuide = true;
+
+ if (this.guide != null && this.useGuidesForEvent(me))
+ {
+ var delta = this.guide.move(this.bounds, new mxPoint(dx, dy), gridEnabled);
+ hideGuide = false;
+ dx = delta.x;
+ dy = delta.y;
+ }
+ else if (gridEnabled)
+ {
+ var trx = graph.getView().translate;
+ var scale = graph.getView().scale;
+
+ var tx = this.bounds.x - (graph.snap(this.bounds.x / scale - trx.x) + trx.x) * scale;
+ var ty = this.bounds.y - (graph.snap(this.bounds.y / scale - trx.y) + trx.y) * scale;
+ var v = this.snap(new mxPoint(dx, dy));
+
+ dx = v.x - tx;
+ dy = v.y - ty;
+ }
+
+ if (this.guide != null && hideGuide)
+ {
+ this.guide.hide();
+ }
+
+ // Constrained movement if shift key is pressed
+ if (graph.isConstrainedEvent(me.getEvent()))
+ {
+ if (Math.abs(dx) > Math.abs(dy))
+ {
+ dy = 0;
+ }
+ else
+ {
+ dx = 0;
+ }
+ }
+
+ this.currentDx = dx;
+ this.currentDy = dy;
+ this.updatePreviewShape();
+
+ var target = null;
+ var cell = me.getCell();
+
+ if (graph.isDropEnabled() && this.highlightEnabled)
+ {
+ // Contains a call to getCellAt to find the cell under the mouse
+ target = graph.getDropTarget(this.cells, me.getEvent(), cell);
+ }
+
+ // Checks if parent is dropped into child
+ var parent = target;
+ var model = graph.getModel();
+
+ while (parent != null && parent != this.cells[0])
+ {
+ parent = model.getParent(parent);
+ }
+
+ var clone = graph.isCloneEvent(me.getEvent()) && graph.isCellsCloneable() && this.isCloneEnabled();
+ var state = graph.getView().getState(target);
+ var highlight = false;
+
+ if (state != null && parent == null && (model.getParent(this.cell) != target || clone))
+ {
+ if (this.target != target)
+ {
+ this.target = target;
+ this.setHighlightColor(mxConstants.DROP_TARGET_COLOR);
+ }
+
+ highlight = true;
+ }
+ else
+ {
+ this.target = null;
+
+ if (this.connectOnDrop && cell != null && this.cells.length == 1 &&
+ graph.getModel().isVertex(cell) && graph.isCellConnectable(cell))
+ {
+ state = graph.getView().getState(cell);
+
+ if (state != null)
+ {
+ var error = graph.getEdgeValidationError(null, this.cell, cell);
+ var color = (error == null) ?
+ mxConstants.VALID_COLOR :
+ mxConstants.INVALID_CONNECT_TARGET_COLOR;
+ this.setHighlightColor(color);
+ highlight = true;
+ }
+ }
+ }
+
+ if (state != null && highlight)
+ {
+ this.highlight.highlight(state);
+ }
+ else
+ {
+ this.highlight.hide();
+ }
+ }
+
+ me.consume();
+
+ // Cancels the bubbling of events to the container so
+ // that the droptarget is not reset due to an mouseMove
+ // fired on the container with no associated state.
+ mxEvent.consume(me.getEvent());
+ }
+ else if ((this.isMoveEnabled() || this.isCloneEnabled()) && this.updateCursor &&
+ !me.isConsumed() && me.getState() != null && !graph.isMouseDown)
+ {
+ var cursor = graph.getCursorForCell(me.getCell());
+
+ if (cursor == null && graph.isEnabled() && graph.isCellMovable(me.getCell()))
+ {
+ if (graph.getModel().isEdge(me.getCell()))
+ {
+ cursor = mxConstants.CURSOR_MOVABLE_EDGE;
+ }
+ else
+ {
+ cursor = mxConstants.CURSOR_MOVABLE_VERTEX;
+ }
+ }
+
+ me.getState().setCursor(cursor);
+ me.consume();
+ }
+};
+
+/**
+ * Function: updatePreviewShape
+ *
+ * Updates the bounds of the preview shape.
+ */
+mxGraphHandler.prototype.updatePreviewShape = function()
+{
+ if (this.shape != null)
+ {
+ this.shape.bounds = new mxRectangle(this.bounds.x + this.currentDx - this.graph.panDx,
+ this.bounds.y + this.currentDy - this.graph.panDy, this.bounds.width, this.bounds.height);
+ this.shape.redraw();
+ }
+};
+
+/**
+ * Function: setHighlightColor
+ *
+ * Sets the color of the rectangle used to highlight drop targets.
+ *
+ * Parameters:
+ *
+ * color - String that represents the new highlight color.
+ */
+mxGraphHandler.prototype.setHighlightColor = function(color)
+{
+ if (this.highlight != null)
+ {
+ this.highlight.setHighlightColor(color);
+ }
+};
+
+/**
+ * Function: mouseUp
+ *
+ * Handles the event by applying the changes to the selection cells.
+ */
+mxGraphHandler.prototype.mouseUp = function(sender, me)
+{
+ if (!me.isConsumed())
+ {
+ var graph = this.graph;
+
+ if (this.cell != null && this.first != null && this.shape != null &&
+ this.currentDx != null && this.currentDy != null)
+ {
+ var scale = graph.getView().scale;
+ var clone = graph.isCloneEvent(me.getEvent()) && graph.isCellsCloneable() && this.isCloneEnabled();
+ var dx = this.currentDx / scale;
+ var dy = this.currentDy / scale;
+
+ var cell = me.getCell();
+
+ if (this.connectOnDrop && this.target == null && cell != null && graph.getModel().isVertex(cell) &&
+ graph.isCellConnectable(cell) && graph.isEdgeValid(null, this.cell, cell))
+ {
+ graph.connectionHandler.connect(this.cell, cell, me.getEvent());
+ }
+ else
+ {
+ var target = this.target;
+
+ if (graph.isSplitEnabled() && graph.isSplitTarget(target, this.cells, me.getEvent()))
+ {
+ graph.splitEdge(target, this.cells, null, dx, dy);
+ }
+ else
+ {
+ this.moveCells(this.cells, dx, dy, clone, this.target, me.getEvent());
+ }
+ }
+ }
+ else if (this.isSelectEnabled() && this.delayedSelection && this.cell != null)
+ {
+ this.selectDelayed(me);
+ }
+ }
+
+ // Consumes the event if a cell was initially clicked
+ if (this.cellWasClicked)
+ {
+ me.consume();
+ }
+
+ this.reset();
+};
+
+/**
+ * Function: selectDelayed
+ *
+ * Implements the delayed selection for the given mouse event.
+ */
+mxGraphHandler.prototype.selectDelayed = function(me)
+{
+ this.graph.selectCellForEvent(this.cell, me.getEvent());
+};
+
+/**
+ * Function: reset
+ *
+ * Resets the state of this handler.
+ */
+mxGraphHandler.prototype.reset = function()
+{
+ this.destroyShapes();
+ this.cellWasClicked = false;
+ this.delayedSelection = false;
+ this.currentDx = null;
+ this.currentDy = null;
+ this.guides = null;
+ this.first = null;
+ this.cell = null;
+ this.target = null;
+};
+
+/**
+ * Function: shouldRemoveCellsFromParent
+ *
+ * Returns true if the given cells should be removed from the parent for the specified
+ * mousereleased event.
+ */
+mxGraphHandler.prototype.shouldRemoveCellsFromParent = function(parent, cells, evt)
+{
+ if (this.graph.getModel().isVertex(parent))
+ {
+ var pState = this.graph.getView().getState(parent);
+ var pt = mxUtils.convertPoint(this.graph.container,
+ mxEvent.getClientX(evt), mxEvent.getClientY(evt));
+
+ return pState != null && !mxUtils.contains(pState, pt.x, pt.y);
+ }
+
+ return false;
+};
+
+/**
+ * Function: moveCells
+ *
+ * Moves the given cells by the specified amount.
+ */
+mxGraphHandler.prototype.moveCells = function(cells, dx, dy, clone, target, evt)
+{
+ if (clone)
+ {
+ cells = this.graph.getCloneableCells(cells);
+ }
+
+ // Removes cells from parent
+ if (target == null && this.isRemoveCellsFromParent() &&
+ this.shouldRemoveCellsFromParent(this.graph.getModel().getParent(this.cell), cells, evt))
+ {
+ target = this.graph.getDefaultParent();
+ }
+
+ // Passes all selected cells in order to correctly clone or move into
+ // the target cell. The method checks for each cell if its movable.
+ cells = this.graph.moveCells(cells, dx - this.graph.panDx / this.graph.view.scale,
+ dy - this.graph.panDy / this.graph.view.scale, clone, target, evt);
+
+ if (this.isSelectEnabled() && this.scrollOnMove)
+ {
+ this.graph.scrollCellToVisible(cells[0]);
+ }
+
+ // Selects the new cells if cells have been cloned
+ if (clone)
+ {
+ this.graph.setSelectionCells(cells);
+ }
+};
+
+/**
+ * Function: destroyShapes
+ *
+ * Destroy the preview and highlight shapes.
+ */
+mxGraphHandler.prototype.destroyShapes = function()
+{
+ // Destroys the preview dashed rectangle
+ if (this.shape != null)
+ {
+ this.shape.destroy();
+ this.shape = null;
+ }
+
+ if (this.guide != null)
+ {
+ this.guide.destroy();
+ this.guide = null;
+ }
+
+ // Destroys the drop target highlight
+ if (this.highlight != null)
+ {
+ this.highlight.destroy();
+ this.highlight = null;
+ }
+};
+
+/**
+ * Function: destroy
+ *
+ * Destroys the handler and all its resources and DOM nodes.
+ */
+mxGraphHandler.prototype.destroy = function()
+{
+ this.graph.removeMouseListener(this);
+ this.graph.removeListener(this.panHandler);
+ this.destroyShapes();
+};
generated by cgit (git 2.34.1) at 2025-03-13 15:04:39 +0000