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-rw-r--r--src/js/handler/mxConstraintHandler.js308
1 files changed, 0 insertions, 308 deletions
diff --git a/src/js/handler/mxConstraintHandler.js b/src/js/handler/mxConstraintHandler.js
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--- a/src/js/handler/mxConstraintHandler.js
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-/**
- * $Id: mxConstraintHandler.js,v 1.15 2012-11-01 16:13:41 gaudenz Exp $
- * Copyright (c) 2006-2010, JGraph Ltd
- */
-/**
- * Class: mxConstraintHandler
- *
- * Handles constraints on connection targets. This class is in charge of
- * showing fixed points when the mouse is over a vertex and handles constraints
- * to establish new connections.
- *
- * Constructor: mxConstraintHandler
- *
- * Constructs an new constraint handler.
- *
- * Parameters:
- *
- * graph - Reference to the enclosing <mxGraph>.
- * factoryMethod - Optional function to create the edge. The function takes
- * the source and target <mxCell> as the first and second argument and
- * returns the <mxCell> that represents the new edge.
- */
-function mxConstraintHandler(graph)
-{
- this.graph = graph;
-};
-
-/**
- * Variable: pointImage
- *
- * <mxImage> to be used as the image for fixed connection points.
- */
-mxConstraintHandler.prototype.pointImage = new mxImage(mxClient.imageBasePath + '/point.gif', 5, 5);
-
-/**
- * Variable: graph
- *
- * Reference to the enclosing <mxGraph>.
- */
-mxConstraintHandler.prototype.graph = null;
-
-/**
- * Variable: enabled
- *
- * Specifies if events are handled. Default is true.
- */
-mxConstraintHandler.prototype.enabled = true;
-
-/**
- * Variable: highlightColor
- *
- * Specifies the color for the highlight. Default is <mxConstants.DEFAULT_VALID_COLOR>.
- */
-mxConstraintHandler.prototype.highlightColor = mxConstants.DEFAULT_VALID_COLOR;
-
-/**
- * Function: isEnabled
- *
- * Returns true if events are handled. This implementation
- * returns <enabled>.
- */
-mxConstraintHandler.prototype.isEnabled = function()
-{
- return this.enabled;
-};
-
-/**
- * Function: setEnabled
- *
- * Enables or disables event handling. This implementation
- * updates <enabled>.
- *
- * Parameters:
- *
- * enabled - Boolean that specifies the new enabled state.
- */
-mxConstraintHandler.prototype.setEnabled = function(enabled)
-{
- this.enabled = enabled;
-};
-
-/**
- * Function: reset
- *
- * Resets the state of this handler.
- */
-mxConstraintHandler.prototype.reset = function()
-{
- if (this.focusIcons != null)
- {
- for (var i = 0; i < this.focusIcons.length; i++)
- {
- this.focusIcons[i].destroy();
- }
-
- this.focusIcons = null;
- }
-
- if (this.focusHighlight != null)
- {
- this.focusHighlight.destroy();
- this.focusHighlight = null;
- }
-
- this.currentConstraint = null;
- this.currentFocusArea = null;
- this.currentPoint = null;
- this.currentFocus = null;
- this.focusPoints = null;
-};
-
-/**
- * Function: getTolerance
- *
- * Returns the tolerance to be used for intersecting connection points.
- */
-mxConstraintHandler.prototype.getTolerance = function()
-{
- return this.graph.getTolerance();
-};
-
-/**
- * Function: getImageForConstraint
- *
- * Returns the tolerance to be used for intersecting connection points.
- */
-mxConstraintHandler.prototype.getImageForConstraint = function(state, constraint, point)
-{
- return this.pointImage;
-};
-
-/**
- * Function: isEventIgnored
- *
- * Returns true if the given <mxMouseEvent> should be ignored in <update>. This
- * implementation always returns false.
- */
-mxConstraintHandler.prototype.isEventIgnored = function(me, source)
-{
- return false;
-};
-
-/**
- * Function: update
- *
- * Updates the state of this handler based on the given <mxMouseEvent>.
- * Source is a boolean indicating if the cell is a source or target.
- */
-mxConstraintHandler.prototype.update = function(me, source)
-{
- if (this.isEnabled() && !this.isEventIgnored(me))
- {
- var tol = this.getTolerance();
- var mouse = new mxRectangle(me.getGraphX() - tol, me.getGraphY() - tol, 2 * tol, 2 * tol);
- var connectable = (me.getCell() != null) ? this.graph.isCellConnectable(me.getCell()) : false;
-
- if ((this.currentFocusArea == null || (!mxUtils.intersects(this.currentFocusArea, mouse) ||
- (me.getState() != null && this.currentFocus != null && connectable))))
- {
- this.currentFocusArea = null;
-
- if (me.getState() != this.currentFocus)
- {
- this.currentFocus = null;
- this.constraints = (me.getState() != null && connectable) ?
- this.graph.getAllConnectionConstraints(me.getState(), source) : null;
-
- // Only uses cells which have constraints
- if (this.constraints != null)
- {
- this.currentFocus = me.getState();
- this.currentFocusArea = new mxRectangle(me.getState().x, me.getState().y, me.getState().width, me.getState().height);
-
- if (this.focusIcons != null)
- {
- for (var i = 0; i < this.focusIcons.length; i++)
- {
- this.focusIcons[i].destroy();
- }
-
- this.focusIcons = null;
- this.focusPoints = null;
- }
-
- this.focusIcons = [];
- this.focusPoints = [];
-
- for (var i = 0; i < this.constraints.length; i++)
- {
- var cp = this.graph.getConnectionPoint(me.getState(), this.constraints[i]);
- var img = this.getImageForConstraint(me.getState(), this.constraints[i], cp);
-
- var src = img.src;
- var bounds = new mxRectangle(cp.x - img.width / 2,
- cp.y - img.height / 2, img.width, img.height);
- var icon = new mxImageShape(bounds, src);
- icon.dialect = (this.graph.dialect == mxConstants.DIALECT_SVG) ?
- mxConstants.DIALECT_SVG :
- mxConstants.DIALECT_VML;
- icon.init(this.graph.getView().getOverlayPane());
-
- // Move the icon behind all other overlays
- if (icon.node.previousSibling != null)
- {
- icon.node.parentNode.insertBefore(icon.node, icon.node.parentNode.firstChild);
- }
-
- var getState = mxUtils.bind(this, function()
- {
- return (this.currentFocus != null) ? this.currentFocus : me.getState();
- });
-
- icon.redraw();
-
- mxEvent.redirectMouseEvents(icon.node, this.graph, getState);
- this.currentFocusArea.add(icon.bounds);
- this.focusIcons.push(icon);
- this.focusPoints.push(cp);
- }
-
- this.currentFocusArea.grow(tol);
- }
- else if (this.focusIcons != null)
- {
- if (this.focusHighlight != null)
- {
- this.focusHighlight.destroy();
- this.focusHighlight = null;
- }
-
- for (var i = 0; i < this.focusIcons.length; i++)
- {
- this.focusIcons[i].destroy();
- }
-
- this.focusIcons = null;
- this.focusPoints = null;
- }
- }
- }
-
- this.currentConstraint = null;
- this.currentPoint = null;
-
- if (this.focusIcons != null && this.constraints != null &&
- (me.getState() == null || this.currentFocus == me.getState()))
- {
- for (var i = 0; i < this.focusIcons.length; i++)
- {
- if (mxUtils.intersects(this.focusIcons[i].bounds, mouse))
- {
- this.currentConstraint = this.constraints[i];
- this.currentPoint = this.focusPoints[i];
-
- var tmp = this.focusIcons[i].bounds.clone();
- tmp.grow((mxClient.IS_IE) ? 3 : 2);
-
- if (mxClient.IS_IE)
- {
- tmp.width -= 1;
- tmp.height -= 1;
- }
-
- if (this.focusHighlight == null)
- {
- var hl = new mxRectangleShape(tmp, null, this.highlightColor, 3);
- hl.dialect = (this.graph.dialect == mxConstants.DIALECT_SVG) ?
- mxConstants.DIALECT_SVG :
- mxConstants.DIALECT_VML;
- hl.init(this.graph.getView().getOverlayPane());
- this.focusHighlight = hl;
-
- var getState = mxUtils.bind(this, function()
- {
- return (this.currentFocus != null) ? this.currentFocus : me.getState();
- });
-
- mxEvent.redirectMouseEvents(hl.node, this.graph, getState/*, mouseDown*/);
- }
- else
- {
- this.focusHighlight.bounds = tmp;
- this.focusHighlight.redraw();
- }
-
- break;
- }
- }
- }
-
- if (this.currentConstraint == null &&
- this.focusHighlight != null)
- {
- this.focusHighlight.destroy();
- this.focusHighlight = null;
- }
- }
-};
-
-/**
- * Function: destroy
- *
- * Destroy this handler.
- */
-mxConstraintHandler.prototype.destroy = function()
-{
- this.reset();
-}; \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-03-13 04:41:36 +0000