create-gojs-kit
Version:
A CLI for downloading GoJS samples, extensions, and docs
151 lines (149 loc) • 5.06 kB
JavaScript
/*
* Copyright 1998-2025 by Northwoods Software Corporation. All Rights Reserved.
*/
/*
* This is an extension and not part of the main GoJS library.
* The source code for this is at extensionsJSM/RealtimeDragSelectingTool.ts.
* 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.
*/
/**
* The RealtimeDragSelectingTool class lets the user select and deselect Parts within the {@link go.DragSelectingTool.box}
* during a drag, not just at the end of the drag.
*
* If you want to experiment with this extension, try the <a href="../../samples/RealtimeDragSelecting.html">Realtime Drag Selecting</a> sample.
* @category Tool Extension
*/
class RealtimeDragSelectingTool extends go.DragSelectingTool {
constructor(init) {
super();
this.name = 'RealtimeDragSelecting';
this._originalSelection = new go.Set();
this._temporarySelection = new go.Set();
if (init)
Object.assign(this, init);
}
/**
* Remember the original collection of selected Parts.
*/
doActivate() {
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.
*/
doDeactivate() {
this.diagram.raiseDiagramEvent('ChangedSelection');
this._originalSelection.clear();
this._temporarySelection.clear();
super.doDeactivate();
}
/**
* Restore the selection which may have been modified during a drag.
*/
doCancel() {
const orig = this._originalSelection;
orig.each((p) => (p.isSelected = true));
this._temporarySelection.each((p) => {
if (!orig.has(p))
p.isSelected = false;
});
super.doCancel();
}
/**
* Select Parts within the bounds of the drag-select box.
*/
doMouseMove() {
if (this.isActive) {
super.doMouseMove();
this.selectInRect(this.computeBoxBounds());
}
}
/**
* Select Parts within the bounds of the drag-select box.
*/
doKeyDown() {
if (this.isActive) {
super.doKeyDown();
this.selectInRect(this.computeBoxBounds());
}
}
/**
* Select Parts within the bounds of the drag-select box.
*/
doKeyUp() {
if (this.isActive) {
super.doKeyUp();
this.selectInRect(this.computeBoxBounds());
}
}
/**
* For a given rectangle, select Parts that are within that rectangle.
* @param r - rectangular bounds in document coordinates.
*/
selectInRect(r) {
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) => {
if (!found.has(p))
p.isSelected = orig.has(p);
});
found.each((p) => {
p.isSelected = false;
temp.add(p);
});
}
else {
// toggle selectedness of parts based on _originalSelection
temp.each((p) => {
if (!found.has(p))
p.isSelected = orig.has(p);
});
found.each((p) => {
p.isSelected = !orig.has(p);
temp.add(p);
});
}
}
else if (e.shift) {
// extend selection only
temp.each((p) => {
if (!found.has(p))
p.isSelected = orig.has(p);
});
found.each((p) => {
p.isSelected = true;
temp.add(p);
});
}
else {
// select found parts, and unselect all other previously selected parts
temp.each((p) => {
if (!found.has(p))
p.isSelected = false;
});
orig.each((p) => {
if (!found.has(p))
p.isSelected = false;
});
found.each((p) => {
p.isSelected = true;
temp.add(p);
});
}
}
}