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mxEdgeHandler.js
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2455 lines (2142 loc) · 60.5 KB
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/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
/**
* Class: mxEdgeHandler
*
* Graph event handler that reconnects edges and modifies control points and
* the edge label location. Uses <mxTerminalMarker> for finding and
* highlighting new source and target vertices. This handler is automatically
* created in <mxGraph.createHandler> for each selected edge.
*
* To enable adding/removing control points, the following code can be used:
*
* (code)
* mxEdgeHandler.prototype.addEnabled = true;
* mxEdgeHandler.prototype.removeEnabled = true;
* (end)
*
* Note: This experimental feature is not recommended for production use.
*
* Constructor: mxEdgeHandler
*
* Constructs an edge handler for the specified <mxCellState>.
*
* Parameters:
*
* state - <mxCellState> of the cell to be handled.
*/
function mxEdgeHandler(state)
{
if (state != null)
{
this.state = state;
this.init();
// Handles escape keystrokes
this.escapeHandler = mxUtils.bind(this, function(sender, evt)
{
var dirty = this.index != null;
this.reset();
if (dirty)
{
this.graph.cellRenderer.redraw(this.state, false, state.view.isRendering());
}
});
this.state.view.graph.addListener(mxEvent.ESCAPE, this.escapeHandler);
}
};
/**
* Variable: graph
*
* Reference to the enclosing <mxGraph>.
*/
mxEdgeHandler.prototype.graph = null;
/**
* Variable: state
*
* Reference to the <mxCellState> being modified.
*/
mxEdgeHandler.prototype.state = null;
/**
* Variable: marker
*
* Holds the <mxTerminalMarker> which is used for highlighting terminals.
*/
mxEdgeHandler.prototype.marker = null;
/**
* Variable: constraintHandler
*
* Holds the <mxConstraintHandler> used for drawing and highlighting
* constraints.
*/
mxEdgeHandler.prototype.constraintHandler = null;
/**
* Variable: error
*
* Holds the current validation error while a connection is being changed.
*/
mxEdgeHandler.prototype.error = null;
/**
* Variable: shape
*
* Holds the <mxShape> that represents the preview edge.
*/
mxEdgeHandler.prototype.shape = null;
/**
* Variable: bends
*
* Holds the <mxShapes> that represent the points.
*/
mxEdgeHandler.prototype.bends = null;
/**
* Variable: labelShape
*
* Holds the <mxShape> that represents the label position.
*/
mxEdgeHandler.prototype.labelShape = null;
/**
* Variable: cloneEnabled
*
* Specifies if cloning by control-drag is enabled. Default is true.
*/
mxEdgeHandler.prototype.cloneEnabled = true;
/**
* Variable: addEnabled
*
* Specifies if adding bends by shift-click is enabled. Default is false.
* Note: This experimental feature is not recommended for production use.
*/
mxEdgeHandler.prototype.addEnabled = false;
/**
* Variable: removeEnabled
*
* Specifies if removing bends by shift-click is enabled. Default is false.
* Note: This experimental feature is not recommended for production use.
*/
mxEdgeHandler.prototype.removeEnabled = false;
/**
* Variable: dblClickRemoveEnabled
*
* Specifies if removing bends by double click is enabled. Default is false.
*/
mxEdgeHandler.prototype.dblClickRemoveEnabled = false;
/**
* Variable: mergeRemoveEnabled
*
* Specifies if removing bends by dropping them on other bends is enabled.
* Default is false.
*/
mxEdgeHandler.prototype.mergeRemoveEnabled = false;
/**
* Variable: straightRemoveEnabled
*
* Specifies if removing bends by creating straight segments should be enabled.
* If enabled, this can be overridden by holding down the alt key while moving.
* Default is false.
*/
mxEdgeHandler.prototype.straightRemoveEnabled = false;
/**
* Variable: virtualBendsEnabled
*
* Specifies if virtual bends should be added in the center of each
* segments. These bends can then be used to add new waypoints.
* Default is false.
*/
mxEdgeHandler.prototype.virtualBendsEnabled = false;
/**
* Variable: virtualBendOpacity
*
* Opacity to be used for virtual bends (see <virtualBendsEnabled>).
* Default is 20.
*/
mxEdgeHandler.prototype.virtualBendOpacity = 20;
/**
* Variable: parentHighlightEnabled
*
* Specifies if the parent should be highlighted if a child cell is selected.
* Default is false.
*/
mxEdgeHandler.prototype.parentHighlightEnabled = false;
/**
* Variable: preferHtml
*
* Specifies if bends should be added to the graph container. This is updated
* in <init> based on whether the edge or one of its terminals has an HTML
* label in the container.
*/
mxEdgeHandler.prototype.preferHtml = false;
/**
* Variable: allowHandleBoundsCheck
*
* Specifies if the bounds of handles should be used for hit-detection in IE
* Default is true.
*/
mxEdgeHandler.prototype.allowHandleBoundsCheck = true;
/**
* Variable: snapToTerminals
*
* Specifies if waypoints should snap to the routing centers of terminals.
* Default is false.
*/
mxEdgeHandler.prototype.snapToTerminals = false;
/**
* Variable: handleImage
*
* Optional <mxImage> to be used as handles. Default is null.
*/
mxEdgeHandler.prototype.handleImage = null;
/**
* Variable: tolerance
*
* Optional tolerance for hit-detection in <getHandleForEvent>. Default is 0.
*/
mxEdgeHandler.prototype.tolerance = 0;
/**
* Variable: outlineConnect
*
* Specifies if connections to the outline of a highlighted target should be
* enabled. This will allow to place the connection point along the outline of
* the highlighted target. Default is false.
*/
mxEdgeHandler.prototype.outlineConnect = false;
/**
* Variable: manageLabelHandle
*
* Specifies if the label handle should be moved if it intersects with another
* handle. Uses <checkLabelHandle> for checking and moving. Default is false.
*/
mxEdgeHandler.prototype.manageLabelHandle = false;
/**
* Function: init
*
* Initializes the shapes required for this edge handler.
*/
mxEdgeHandler.prototype.init = function()
{
this.graph = this.state.view.graph;
this.marker = this.createMarker();
this.constraintHandler = new mxConstraintHandler(this.graph);
// Clones the original points from the cell
// and makes sure at least one point exists
this.points = [];
// Uses the absolute points of the state
// for the initial configuration and preview
this.abspoints = this.getSelectionPoints(this.state);
this.shape = this.createSelectionShape(this.abspoints);
this.shape.dialect = (this.graph.dialect != mxConstants.DIALECT_SVG) ?
mxConstants.DIALECT_MIXEDHTML : mxConstants.DIALECT_SVG;
this.shape.init(this.graph.getView().getOverlayPane());
this.shape.pointerEvents = false;
this.shape.setCursor(mxConstants.CURSOR_MOVABLE_EDGE);
mxEvent.redirectMouseEvents(this.shape.node, this.graph, this.state);
// Updates preferHtml
this.preferHtml = this.state.text != null &&
this.state.text.node.parentNode == this.graph.container;
if (!this.preferHtml)
{
// Checks source terminal
var sourceState = this.state.getVisibleTerminalState(true);
if (sourceState != null)
{
this.preferHtml = sourceState.text != null &&
sourceState.text.node.parentNode == this.graph.container;
}
if (!this.preferHtml)
{
// Checks target terminal
var targetState = this.state.getVisibleTerminalState(false);
if (targetState != null)
{
this.preferHtml = targetState.text != null &&
targetState.text.node.parentNode == this.graph.container;
}
}
}
// Adds highlight for parent group
if (this.parentHighlightEnabled)
{
var parent = this.graph.model.getParent(this.state.cell);
if (this.graph.model.isVertex(parent))
{
var pstate = this.graph.view.getState(parent);
if (pstate != null)
{
this.parentHighlight = this.createParentHighlightShape(pstate);
// VML dialect required here for event transparency in IE
this.parentHighlight.dialect = (this.graph.dialect != mxConstants.DIALECT_SVG) ? mxConstants.DIALECT_VML : mxConstants.DIALECT_SVG;
this.parentHighlight.pointerEvents = false;
this.parentHighlight.rotation = Number(pstate.style[mxConstants.STYLE_ROTATION] || '0');
this.parentHighlight.init(this.graph.getView().getOverlayPane());
}
}
}
// Creates bends for the non-routed absolute points
// or bends that don't correspond to points
if (this.graph.getSelectionCount() < mxGraphHandler.prototype.maxCells ||
mxGraphHandler.prototype.maxCells <= 0)
{
this.bends = this.createBends();
if (this.isVirtualBendsEnabled())
{
this.virtualBends = this.createVirtualBends();
}
}
// Adds a rectangular handle for the label position
this.label = new mxPoint(this.state.absoluteOffset.x, this.state.absoluteOffset.y);
this.labelShape = this.createLabelHandleShape();
this.initBend(this.labelShape);
this.labelShape.setCursor(mxConstants.CURSOR_LABEL_HANDLE);
this.customHandles = this.createCustomHandles();
this.redraw();
};
/**
* Function: createCustomHandles
*
* Returns an array of custom handles. This implementation returns null.
*/
mxEdgeHandler.prototype.createCustomHandles = function()
{
return null;
};
/**
* Function: isVirtualBendsEnabled
*
* Returns true if virtual bends should be added. This returns true if
* <virtualBendsEnabled> is true and the current style allows and
* renders custom waypoints.
*/
mxEdgeHandler.prototype.isVirtualBendsEnabled = function(evt)
{
return this.virtualBendsEnabled && (this.state.style[mxConstants.STYLE_EDGE] == null ||
this.state.style[mxConstants.STYLE_EDGE] == mxConstants.NONE ||
this.state.style[mxConstants.STYLE_NOEDGESTYLE] == 1) &&
mxUtils.getValue(this.state.style, mxConstants.STYLE_SHAPE, null) != 'arrow';
};
/**
* Function: isAddPointEvent
*
* Returns true if the given event is a trigger to add a new point. This
* implementation returns true if shift is pressed.
*/
mxEdgeHandler.prototype.isAddPointEvent = function(evt)
{
return mxEvent.isShiftDown(evt);
};
/**
* Function: isRemovePointEvent
*
* Returns true if the given event is a trigger to remove a point. This
* implementation returns true if shift is pressed.
*/
mxEdgeHandler.prototype.isRemovePointEvent = function(evt)
{
return mxEvent.isShiftDown(evt);
};
/**
* Function: getSelectionPoints
*
* Returns the list of points that defines the selection stroke.
*/
mxEdgeHandler.prototype.getSelectionPoints = function(state)
{
return state.absolutePoints;
};
/**
* Function: createSelectionShape
*
* Creates the shape used to draw the selection border.
*/
mxEdgeHandler.prototype.createParentHighlightShape = function(bounds)
{
var shape = new mxRectangleShape(bounds, null, this.getSelectionColor());
shape.strokewidth = this.getSelectionStrokeWidth();
shape.isDashed = this.isSelectionDashed();
return shape;
};
/**
* Function: createSelectionShape
*
* Creates the shape used to draw the selection border.
*/
mxEdgeHandler.prototype.createSelectionShape = function(points)
{
var shape = new this.state.shape.constructor();
shape.outline = true;
shape.apply(this.state);
shape.isDashed = this.isSelectionDashed();
shape.stroke = this.getSelectionColor();
shape.isShadow = false;
return shape;
};
/**
* Function: getSelectionColor
*
* Returns <mxConstants.EDGE_SELECTION_COLOR>.
*/
mxEdgeHandler.prototype.getSelectionColor = function()
{
return mxConstants.EDGE_SELECTION_COLOR;
};
/**
* Function: getSelectionStrokeWidth
*
* Returns <mxConstants.EDGE_SELECTION_STROKEWIDTH>.
*/
mxEdgeHandler.prototype.getSelectionStrokeWidth = function()
{
return mxConstants.EDGE_SELECTION_STROKEWIDTH;
};
/**
* Function: isSelectionDashed
*
* Returns <mxConstants.EDGE_SELECTION_DASHED>.
*/
mxEdgeHandler.prototype.isSelectionDashed = function()
{
return mxConstants.EDGE_SELECTION_DASHED;
};
/**
* Function: isConnectableCell
*
* Returns true if the given cell is connectable. This is a hook to
* disable floating connections. This implementation returns true.
*/
mxEdgeHandler.prototype.isConnectableCell = function(cell)
{
return true;
};
/**
* Function: getCellAt
*
* Creates and returns the <mxCellMarker> used in <marker>.
*/
mxEdgeHandler.prototype.getCellAt = function(x, y)
{
return (!this.outlineConnect) ? this.graph.getCellAt(x, y) : null;
};
/**
* Function: createMarker
*
* Creates and returns the <mxCellMarker> used in <marker>.
*/
mxEdgeHandler.prototype.createMarker = function()
{
var marker = new mxCellMarker(this.graph);
var self = this; // closure
// Only returns edges if they are connectable and never returns
// the edge that is currently being modified
marker.getCell = function(me)
{
var cell = mxCellMarker.prototype.getCell.apply(this, arguments);
// Checks for cell at preview point (with grid)
if ((cell == self.state.cell || cell == null) && self.currentPoint != null)
{
cell = self.graph.getCellAt(self.currentPoint.x, self.currentPoint.y);
}
// Uses connectable parent vertex if one exists
if (cell != null && !this.graph.isCellConnectable(cell))
{
var parent = this.graph.getModel().getParent(cell);
if (this.graph.getModel().isVertex(parent) && this.graph.isCellConnectable(parent))
{
cell = parent;
}
}
var model = self.graph.getModel();
if ((this.graph.isSwimlane(cell) && self.currentPoint != null &&
this.graph.hitsSwimlaneContent(cell, self.currentPoint.x, self.currentPoint.y)) ||
(!self.isConnectableCell(cell)) || (cell == self.state.cell ||
(cell != null && !self.graph.connectableEdges && model.isEdge(cell))) ||
model.isAncestor(self.state.cell, cell))
{
cell = null;
}
if (!this.graph.isCellConnectable(cell))
{
cell = null;
}
return cell;
};
// Sets the highlight color according to validateConnection
marker.isValidState = function(state)
{
var model = self.graph.getModel();
var other = self.graph.view.getTerminalPort(state,
self.graph.view.getState(model.getTerminal(self.state.cell,
!self.isSource)), !self.isSource);
var otherCell = (other != null) ? other.cell : null;
var source = (self.isSource) ? state.cell : otherCell;
var target = (self.isSource) ? otherCell : state.cell;
// Updates the error message of the handler
self.error = self.validateConnection(source, target);
return self.error == null;
};
return marker;
};
/**
* Function: validateConnection
*
* Returns the error message or an empty string if the connection for the
* given source, target pair is not valid. Otherwise it returns null. This
* implementation uses <mxGraph.getEdgeValidationError>.
*
* Parameters:
*
* source - <mxCell> that represents the source terminal.
* target - <mxCell> that represents the target terminal.
*/
mxEdgeHandler.prototype.validateConnection = function(source, target)
{
return this.graph.getEdgeValidationError(this.state.cell, source, target);
};
/**
* Function: createBends
*
* Creates and returns the bends used for modifying the edge. This is
* typically an array of <mxRectangleShapes>.
*/
mxEdgeHandler.prototype.createBends = function()
{
var cell = this.state.cell;
var bends = [];
for (var i = 0; i < this.abspoints.length; i++)
{
if (this.isHandleVisible(i))
{
var source = i == 0;
var target = i == this.abspoints.length - 1;
var terminal = source || target;
if (terminal || this.graph.isCellBendable(cell))
{
(mxUtils.bind(this, function(index)
{
var bend = this.createHandleShape(index);
this.initBend(bend, mxUtils.bind(this, mxUtils.bind(this, function()
{
if (this.dblClickRemoveEnabled)
{
this.removePoint(this.state, index);
}
})));
if (this.isHandleEnabled(i))
{
bend.setCursor((terminal) ? mxConstants.CURSOR_TERMINAL_HANDLE : mxConstants.CURSOR_BEND_HANDLE);
}
bends.push(bend);
if (!terminal)
{
this.points.push(new mxPoint(0,0));
bend.node.style.visibility = 'hidden';
}
}))(i);
}
}
}
return bends;
};
/**
* Function: createVirtualBends
*
* Creates and returns the bends used for modifying the edge. This is
* typically an array of <mxRectangleShapes>.
*/
mxEdgeHandler.prototype.createVirtualBends = function()
{
var cell = this.state.cell;
var last = this.abspoints[0];
var bends = [];
if (this.graph.isCellBendable(cell))
{
for (var i = 1; i < this.abspoints.length; i++)
{
(mxUtils.bind(this, function(bend)
{
this.initBend(bend);
bend.setCursor(mxConstants.CURSOR_VIRTUAL_BEND_HANDLE);
bends.push(bend);
}))(this.createHandleShape());
}
}
return bends;
};
/**
* Function: isHandleEnabled
*
* Creates the shape used to display the given bend.
*/
mxEdgeHandler.prototype.isHandleEnabled = function(index)
{
return true;
};
/**
* Function: isHandleVisible
*
* Returns true if the handle at the given index is visible.
*/
mxEdgeHandler.prototype.isHandleVisible = function(index)
{
var source = this.state.getVisibleTerminalState(true);
var target = this.state.getVisibleTerminalState(false);
var geo = this.graph.getCellGeometry(this.state.cell);
var edgeStyle = (geo != null) ? this.graph.view.getEdgeStyle(this.state, geo.points, source, target) : null;
return edgeStyle != mxEdgeStyle.EntityRelation || index == 0 || index == this.abspoints.length - 1;
};
/**
* Function: createHandleShape
*
* Creates the shape used to display the given bend. Note that the index may be
* null for special cases, such as when called from
* <mxElbowEdgeHandler.createVirtualBend>. Only images and rectangles should be
* returned if support for HTML labels with not foreign objects is required.
* Index if null for virtual handles.
*/
mxEdgeHandler.prototype.createHandleShape = function(index)
{
if (this.handleImage != null)
{
var shape = new mxImageShape(new mxRectangle(0, 0, this.handleImage.width, this.handleImage.height), this.handleImage.src);
// Allows HTML rendering of the images
shape.preserveImageAspect = false;
return shape;
}
else
{
var s = mxConstants.HANDLE_SIZE;
if (this.preferHtml)
{
s -= 1;
}
return new mxRectangleShape(new mxRectangle(0, 0, s, s), mxConstants.HANDLE_FILLCOLOR, mxConstants.HANDLE_STROKECOLOR);
}
};
/**
* Function: createLabelHandleShape
*
* Creates the shape used to display the the label handle.
*/
mxEdgeHandler.prototype.createLabelHandleShape = function()
{
if (this.labelHandleImage != null)
{
var shape = new mxImageShape(new mxRectangle(0, 0, this.labelHandleImage.width, this.labelHandleImage.height), this.labelHandleImage.src);
// Allows HTML rendering of the images
shape.preserveImageAspect = false;
return shape;
}
else
{
var s = mxConstants.LABEL_HANDLE_SIZE;
return new mxRectangleShape(new mxRectangle(0, 0, s, s), mxConstants.LABEL_HANDLE_FILLCOLOR, mxConstants.HANDLE_STROKECOLOR);
}
};
/**
* Function: initBend
*
* Helper method to initialize the given bend.
*
* Parameters:
*
* bend - <mxShape> that represents the bend to be initialized.
*/
mxEdgeHandler.prototype.initBend = function(bend, dblClick)
{
if (this.preferHtml)
{
bend.dialect = mxConstants.DIALECT_STRICTHTML;
bend.init(this.graph.container);
}
else
{
bend.dialect = (this.graph.dialect != mxConstants.DIALECT_SVG) ?
mxConstants.DIALECT_MIXEDHTML : mxConstants.DIALECT_SVG;
bend.init(this.graph.getView().getOverlayPane());
}
mxEvent.redirectMouseEvents(bend.node, this.graph, this.state,
null, null, null, dblClick);
// Fixes lost event tracking for images in quirks / IE8 standards
if (mxClient.IS_QUIRKS || document.documentMode == 8)
{
mxEvent.addListener(bend.node, 'dragstart', function(evt)
{
mxEvent.consume(evt);
return false;
});
}
if (mxClient.IS_TOUCH)
{
bend.node.setAttribute('pointer-events', 'none');
}
};
/**
* Function: getHandleForEvent
*
* Returns the index of the handle for the given event.
*/
mxEdgeHandler.prototype.getHandleForEvent = function(me)
{
// Connection highlight may consume events before they reach sizer handle
var tol = (!mxEvent.isMouseEvent(me.getEvent())) ? this.tolerance : 1;
var hit = (this.allowHandleBoundsCheck && (mxClient.IS_IE || tol > 0)) ?
new mxRectangle(me.getGraphX() - tol, me.getGraphY() - tol, 2 * tol, 2 * tol) : null;
var minDistSq = null;
var result = null;
function checkShape(shape)
{
if (shape != null && shape.node.style.display != 'none' && shape.node.style.visibility != 'hidden' &&
(me.isSource(shape) || (hit != null && mxUtils.intersects(shape.bounds, hit))))
{
var dx = me.getGraphX() - shape.bounds.getCenterX();
var dy = me.getGraphY() - shape.bounds.getCenterY();
var tmp = dx * dx + dy * dy;
if (minDistSq == null || tmp <= minDistSq)
{
minDistSq = tmp;
return true;
}
}
return false;
}
if (this.customHandles != null && this.isCustomHandleEvent(me))
{
// Inverse loop order to match display order
for (var i = this.customHandles.length - 1; i >= 0; i--)
{
if (checkShape(this.customHandles[i].shape))
{
// LATER: Return reference to active shape
return mxEvent.CUSTOM_HANDLE - i;
}
}
}
if (me.isSource(this.state.text) || checkShape(this.labelShape))
{
result = mxEvent.LABEL_HANDLE;
}
if (this.bends != null)
{
for (var i = 0; i < this.bends.length; i++)
{
if (checkShape(this.bends[i]))
{
result = i;
}
}
}
if (this.virtualBends != null && this.isAddVirtualBendEvent(me))
{
for (var i = 0; i < this.virtualBends.length; i++)
{
if (checkShape(this.virtualBends[i]))
{
result = mxEvent.VIRTUAL_HANDLE - i;
}
}
}
return result;
};
/**
* Function: isAddVirtualBendEvent
*
* Returns true if the given event allows virtual bends to be added. This
* implementation returns true.
*/
mxEdgeHandler.prototype.isAddVirtualBendEvent = function(me)
{
return true;
};
/**
* Function: isCustomHandleEvent
*
* Returns true if the given event allows custom handles to be changed. This
* implementation returns true.
*/
mxEdgeHandler.prototype.isCustomHandleEvent = function(me)
{
return true;
};
/**
* Function: mouseDown
*
* Handles the event by checking if a special element of the handler
* was clicked, in which case the index parameter is non-null. The
* indices may be one of <LABEL_HANDLE> or the number of the respective
* control point. The source and target points are used for reconnecting
* the edge.
*/
mxEdgeHandler.prototype.mouseDown = function(sender, me)
{
var handle = this.getHandleForEvent(me);
if (this.bends != null && this.bends[handle] != null)
{
var b = this.bends[handle].bounds;
this.snapPoint = new mxPoint(b.getCenterX(), b.getCenterY());
}
if (this.addEnabled && handle == null && this.isAddPointEvent(me.getEvent()))
{
this.addPoint(this.state, me.getEvent());
me.consume();
}
else if (handle != null && !me.isConsumed() && this.graph.isEnabled())
{
if (this.removeEnabled && this.isRemovePointEvent(me.getEvent()))
{
this.removePoint(this.state, handle);
}
else if (handle != mxEvent.LABEL_HANDLE || this.graph.isLabelMovable(me.getCell()))
{
if (handle <= mxEvent.VIRTUAL_HANDLE)
{
mxUtils.setOpacity(this.virtualBends[mxEvent.VIRTUAL_HANDLE - handle].node, 100);
}
this.start(me.getX(), me.getY(), handle);
}
me.consume();
}
};
/**
* Function: start
*
* Starts the handling of the mouse gesture.
*/
mxEdgeHandler.prototype.start = function(x, y, index)
{
this.startX = x;
this.startY = y;
this.isSource = (this.bends == null) ? false : index == 0;
this.isTarget = (this.bends == null) ? false : index == this.bends.length - 1;
this.isLabel = index == mxEvent.LABEL_HANDLE;
if (this.isSource || this.isTarget)
{
var cell = this.state.cell;
var terminal = this.graph.model.getTerminal(cell, this.isSource);
if ((terminal == null && this.graph.isTerminalPointMovable(cell, this.isSource)) ||
(terminal != null && this.graph.isCellDisconnectable(cell, terminal, this.isSource)))
{
this.index = index;
}
}
else
{
this.index = index;
}
// Hides other custom handles
if (this.index <= mxEvent.CUSTOM_HANDLE && this.index > mxEvent.VIRTUAL_HANDLE)
{
if (this.customHandles != null)
{
for (var i = 0; i < this.customHandles.length; i++)
{
if (i != mxEvent.CUSTOM_HANDLE - this.index)
{
this.customHandles[i].setVisible(false);
}
}
}
}
};
/**
* Function: clonePreviewState
*
* Returns a clone of the current preview state for the given point and terminal.
*/
mxEdgeHandler.prototype.clonePreviewState = function(point, terminal)
{
return this.state.clone();
};
/**
* Function: getSnapToTerminalTolerance
*
* Returns the tolerance for the guides. Default value is
* gridSize * scale / 2.
*/
mxEdgeHandler.prototype.getSnapToTerminalTolerance = function()
{
return this.graph.gridSize * this.graph.view.scale / 2;
};
/**
* Function: updateHint
*
* Hook for subclassers do show details while the handler is active.
*/
mxEdgeHandler.prototype.updateHint = function(me, point) { };
/**
* Function: removeHint
*
* Hooks for subclassers to hide details when the handler gets inactive.
*/
mxEdgeHandler.prototype.removeHint = function() { };
/**
* Function: roundLength
*
* Hook for rounding the unscaled width or height. This uses Math.round.
*/
mxEdgeHandler.prototype.roundLength = function(length)
{