/*
* Copyright (C) 1998-2023 by Northwoods Software Corporation. All Rights Reserved.
*/
/*
* This is an extension and not part of the main GoJS library.
* Note that the API for this class may change with any version, even point releases.
* If you intend to use an extension in production, you should copy the code to your own source directory.
* Extensions can be found in the GoJS kit under the extensions or extensionsJSM folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/
import * as go from '../release/go-module.js';
/**
* The RealtimeDragSelectingTool class lets the user select and deselect Parts within the {@link DragSelectingTool#box}
* during a drag, not just at the end of the drag.
*
* If you want to experiment with this extension, try the Realtime Drag Selecting sample.
* @category Tool Extension
*/
export class RealtimeDragSelectingTool extends go.DragSelectingTool {
private _originalSelection: go.Set = new go.Set();
private _temporarySelection: go.Set = new go.Set();
/**
* Remember the original collection of selected Parts.
*/
public override doActivate(): void {
super.doActivate();
// keep a copy of the original Set of selected Parts
this._originalSelection = this.diagram.selection.copy();
// these Part.isSelected may have been temporarily modified
this._temporarySelection.clear();
this.diagram.raiseDiagramEvent('ChangingSelection');
}
/**
* Release any references to selected Parts.
*/
public override doDeactivate(): void {
this.diagram.raiseDiagramEvent('ChangedSelection');
this._originalSelection.clear();
this._temporarySelection.clear();
super.doDeactivate();
}
/**
* Restore the selection which may have been modified during a drag.
*/
public override doCancel(): void {
const orig = this._originalSelection;
orig.each(p => p.isSelected = true);
this._temporarySelection.each(p => { if (!orig.contains(p)) p.isSelected = false; });
super.doCancel();
}
/**
* Select Parts within the bounds of the drag-select box.
*/
public override doMouseMove(): void {
if (this.isActive) {
super.doMouseMove();
this.selectInRect(this.computeBoxBounds());
}
}
/**
* Select Parts within the bounds of the drag-select box.
*/
public override doKeyDown(): void {
if (this.isActive) {
super.doKeyDown();
this.selectInRect(this.computeBoxBounds());
}
}
/**
* Select Parts within the bounds of the drag-select box.
*/
public override doKeyUp(): void {
if (this.isActive) {
super.doKeyUp();
this.selectInRect(this.computeBoxBounds());
}
}
/**
* For a given rectangle, select Parts that are within that rectangle.
* @param {Rect} r rectangular bounds in document coordinates.
*/
public override selectInRect(r: go.Rect): void {
const diagram = this.diagram;
const orig = this._originalSelection;
const temp = this._temporarySelection;
const e = diagram.lastInput;
const found = diagram.findPartsIn(r, this.isPartialInclusion);
if (e.control || e.meta) { // toggle or deselect
if (e.shift) { // deselect only
temp.each((p: go.Part) => { if (!found.contains(p)) p.isSelected = orig.contains(p); });
found.each((p: go.Part) => { p.isSelected = false; temp.add(p); });
} else { // toggle selectedness of parts based on _originalSelection
temp.each((p: go.Part) => { if (!found.contains(p)) p.isSelected = orig.contains(p); });
found.each((p: go.Part) => { p.isSelected = !orig.contains(p); temp.add(p); });
}
} else if (e.shift) { // extend selection only
temp.each((p: go.Part) => { if (!found.contains(p)) p.isSelected = orig.contains(p); });
found.each((p: go.Part) => { p.isSelected = true; temp.add(p); });
} else { // select found parts, and unselect all other previously selected parts
temp.each((p: go.Part) => { if (!found.contains(p)) p.isSelected = false; });
orig.each((p: go.Part) => { if (!found.contains(p)) p.isSelected = false; });
found.each((p: go.Part) => { p.isSelected = true; temp.add(p); });
}
}
}