122 lines
4.2 KiB
JavaScript
122 lines
4.2 KiB
JavaScript
"use strict";
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/*
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* Copyright (C) 1998-2017 by Northwoods Software Corporation. All Rights Reserved.
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*/
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// A custom DragSelectingTool for selecting and deselecting Parts during a drag.
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/**
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* @constructor
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* @extends DragSelectingTool
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* @class
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* The RealtimeDragSelectingTool selects and deselects Parts within the {@link DragSelectingTool#box}
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* during a drag, not just at the end of the drag.
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*/
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function RealtimeDragSelectingTool() {
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go.DragSelectingTool.call(this);
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this._originalSelection = null;
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this._temporarySelection = null;
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}
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go.Diagram.inherit(RealtimeDragSelectingTool, go.DragSelectingTool);
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/**
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* Remember the original collection of selected Parts.
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* @this {RealtimeDragSelectingTool}
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*/
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RealtimeDragSelectingTool.prototype.doActivate = function() {
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go.DragSelectingTool.prototype.doActivate.call(this);
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// keep a copy of the original Set of selected Parts
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this._originalSelection = this.diagram.selection.copy();
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// these Part.isSelected may have been temporarily modified
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this._temporarySelection = new go.Set(go.Part);
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};
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/**
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* Release any references to selected Parts.
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* @this {RealtimeDragSelectingTool}
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*/
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RealtimeDragSelectingTool.prototype.doDeactivate = function() {
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this._originalSelection = null;
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this._temporarySelection = null;
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go.DragSelectingTool.prototype.doDeactivate.call(this);
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};
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/**
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* Restore the selection which may have been modified during a drag.
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* @this {RealtimeDragSelectingTool}
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*/
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RealtimeDragSelectingTool.prototype.doCancel = function() {
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var orig = this._originalSelection;
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if (orig !== null) {
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orig.each(function(p) { p.isSelected = true; });
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this._temporarySelection.each(function(p) { if (!orig.contains(p)) p.isSelected = false; });
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}
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go.DragSelectingTool.prototype.doCancel.call(this);
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};
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/**
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* @this {RealtimeDragSelectingTool}
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*/
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RealtimeDragSelectingTool.prototype.doMouseMove = function() {
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if (this.isActive) {
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go.DragSelectingTool.prototype.doMouseMove.call(this);
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this.selectInRect(this.computeBoxBounds());
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}
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};
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/**
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* @this {RealtimeDragSelectingTool}
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*/
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RealtimeDragSelectingTool.prototype.doKeyDown = function() {
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if (this.isActive) {
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go.DragSelectingTool.prototype.doKeyDown.call(this);
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this.selectInRect(this.computeBoxBounds());
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}
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};
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/**
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* @this {RealtimeDragSelectingTool}
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*/
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RealtimeDragSelectingTool.prototype.doKeyUp = function() {
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if (this.isActive) {
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go.DragSelectingTool.prototype.doKeyUp.call(this);
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this.selectInRect(this.computeBoxBounds());
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}
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};
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/**
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* @expose
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* @this {RealtimeDragSelectingTool}
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* @param {Rect} r a rectangular bounds in document coordinates.
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*/
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RealtimeDragSelectingTool.prototype.selectInRect = function(r) {
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var diagram = this.diagram;
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var orig = this._originalSelection;
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var temp = this._temporarySelection;
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if (diagram === null || orig === null) return;
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var e = diagram.lastInput;
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diagram.raiseDiagramEvent("ChangingSelection");
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var found = diagram.findObjectsIn(r, null,
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function(p) { return (p instanceof go.Part) && p.canSelect(); },
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this.isPartialInclusion,
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new go.Set(go.Part));
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if (e.control || e.meta) { // toggle or deselect
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if (e.shift) { // deselect only
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temp.each(function(p) { if (!found.contains(p)) p.isSelected = orig.contains(p); });
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found.each(function(p) { p.isSelected = false; temp.add(p); });
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} else { // toggle selectedness of parts based on _originalSelection
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temp.each(function(p) { if (!found.contains(p)) p.isSelected = orig.contains(p); });
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found.each(function(p) { p.isSelected = !orig.contains(p); temp.add(p); });
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}
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} else if (e.shift) { // extend selection only
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temp.each(function(p) { if (!found.contains(p)) p.isSelected = orig.contains(p); });
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found.each(function(p) { p.isSelected = true; temp.add(p); });
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} else { // select found parts, and unselect all other previously selected parts
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temp.each(function(p) { if (!found.contains(p)) p.isSelected = false; });
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orig.each(function(p) { if (!found.contains(p)) p.isSelected = false; });
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found.each(function(p) { p.isSelected = true; temp.add(p); });
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}
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diagram.raiseDiagramEvent("ChangedSelection");
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};
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