gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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JavaScript
/*
* Copyright (C) 1998-2020 by Northwoods Software Corporation. All Rights Reserved.
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define(["require", "exports", "../release/go.js"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*
* 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 extensionsTS folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/
var go = require("../release/go.js");
/**
* The DragZoomingTool lets the user zoom into a diagram by stretching a box
* to indicate the new contents of the diagram's viewport (the area of the
* model shown by the Diagram).
* Hold down the Shift key in order to zoom out.
*
* The default drag selection box is a magenta rectangle.
* You can modify the {@link #box} to customize its appearance.
*
* The diagram that is zoomed by this tool is specified by the {@link #zoomedDiagram} property.
* If the value is null, the tool zooms its own {@link Tool#diagram}.
*
* You can use this tool in a modal manner by executing:
* ```js
* diagram.currentTool = new DragZoomingTool();
* ```
*
* Use this tool in a mode-less manner by executing:
* ```js
* myDiagram.toolManager.mouseMoveTools.insertAt(2, new DragZoomingTool());
* ```
*
* However when used mode-lessly as a mouse-move tool, in {@link ToolManager#mouseMoveTools},
* this cannot start running unless there has been a motionless delay
* after the mouse-down event of at least {@link #delay} milliseconds.
*
* This tool does not utilize any {@link Adornment}s or tool handles,
* but it does temporarily add the {@link #box} part to the diagram.
* This tool does not modify the model or conduct any transaction.
*
* If you want to experiment with this extension, try the <a href="../../extensionsTS/DragZooming.html">Drag Zooming</a> sample.
* @category Tool Extension
*/
var DragZoomingTool = /** @class */ (function (_super) {
__extends(DragZoomingTool, _super);
/**
* Constructs a DragZoomingTool, sets {@link #box} to a magenta rectangle, and sets name of the tool.
*/
function DragZoomingTool() {
var _this = _super.call(this) || this;
_this._delay = 175;
_this._zoomedDiagram = null;
var b = new go.Part();
var r = new go.Shape();
b.layerName = 'Tool';
b.selectable = false;
r.name = 'SHAPE';
r.figure = 'Rectangle';
r.fill = null;
r.stroke = 'magenta';
r.position = new go.Point(0, 0);
b.add(r);
_this._box = b;
_this.name = 'DragZooming';
return _this;
}
Object.defineProperty(DragZoomingTool.prototype, "box", {
/**
* Gets or sets the {@link Part} used as the "rubber-band zoom box"
* that is stretched to follow the mouse, as feedback for what area will
* be passed to {@link #zoomToRect} upon a mouse-up.
*
* Initially this is a {@link Part} containing only a simple magenta rectangular {@link Shape}.
* The object to be resized should be named "SHAPE".
* Setting this property does not raise any events.
*
* Modifying this property while this tool {@link Tool#isActive} might have no effect.
*/
get: function () { return this._box; },
set: function (val) { this._box = val; },
enumerable: true,
configurable: true
});
Object.defineProperty(DragZoomingTool.prototype, "delay", {
/**
* Gets or sets the time in milliseconds for which the mouse must be stationary
* before this tool can be started.
*
* The default value is 175 milliseconds.
* Setting this property does not raise any events.
*/
get: function () { return this._delay; },
set: function (val) { this._delay = val; },
enumerable: true,
configurable: true
});
Object.defineProperty(DragZoomingTool.prototype, "zoomedDiagram", {
/**
* Gets or sets the {@link Diagram} whose {@link Diagram#position} and {@link Diagram#scale}
* should be set to display the drawn {@link #box} rectangular bounds.
*
* The default value is null, which causes {@link #zoomToRect} to modify this tool's {@link Tool#diagram}.
* Setting this property does not raise any events.
*/
get: function () { return this._zoomedDiagram; },
set: function (val) { this._zoomedDiagram = val; },
enumerable: true,
configurable: true
});
/**
* This tool can run when there has been a mouse-drag, far enough away not to be a click,
* and there has been delay of at least {@link #delay} milliseconds
* after the mouse-down before a mouse-move.
*/
DragZoomingTool.prototype.canStart = function () {
if (!this.isEnabled)
return false;
var diagram = this.diagram;
var e = diagram.lastInput;
// require left button & that it has moved far enough away from the mouse down point, so it isn't a click
if (!e.left)
return false;
// don't include the following checks when this tool is running modally
if (diagram.currentTool !== this) {
if (!this.isBeyondDragSize())
return false;
// must wait for "delay" milliseconds before that tool can run
if (e.timestamp - diagram.firstInput.timestamp < this.delay)
return false;
}
return true;
};
/**
* Capture the mouse and show the {@link #box}.
*/
DragZoomingTool.prototype.doActivate = function () {
var diagram = this.diagram;
this.isActive = true;
diagram.isMouseCaptured = true;
diagram.skipsUndoManager = true;
diagram.add(this.box);
this.doMouseMove();
};
/**
* Release the mouse and remove any {@link #box}.
*/
DragZoomingTool.prototype.doDeactivate = function () {
var diagram = this.diagram;
diagram.remove(this.box);
diagram.skipsUndoManager = false;
diagram.isMouseCaptured = false;
this.isActive = false;
};
/**
* Update the {@link #box}'s position and size according to the value
* of {@link #computeBoxBounds}.
*/
DragZoomingTool.prototype.doMouseMove = function () {
var diagram = this.diagram;
if (this.isActive && this.box !== null) {
var r = this.computeBoxBounds();
var shape = this.box.findObject('SHAPE');
if (shape === null)
shape = this.box.findMainElement();
if (shape !== null)
shape.desiredSize = r.size;
this.box.position = r.position;
}
};
/**
* Call {@link #zoomToRect} with the value of a call to {@link #computeBoxBounds}.
*/
DragZoomingTool.prototype.doMouseUp = function () {
if (this.isActive) {
var diagram = this.diagram;
diagram.remove(this.box);
try {
diagram.currentCursor = 'wait';
this.zoomToRect(this.computeBoxBounds());
}
finally {
diagram.currentCursor = '';
}
}
this.stopTool();
};
/**
* This just returns a {@link Rect} stretching from the mouse-down point to the current mouse point
* while maintaining the aspect ratio of the {@link #zoomedDiagram}.
* @return {Rect} a {@link Rect} in document coordinates.
*/
DragZoomingTool.prototype.computeBoxBounds = function () {
var diagram = this.diagram;
var start = diagram.firstInput.documentPoint;
var latest = diagram.lastInput.documentPoint;
var adx = latest.x - start.x;
var ady = latest.y - start.y;
var observed = this.zoomedDiagram;
if (observed === null)
observed = diagram;
if (observed === null) {
return new go.Rect(start, latest);
}
var vrect = observed.viewportBounds;
if (vrect.height === 0 || ady === 0) {
return new go.Rect(start, latest);
}
var vratio = vrect.width / vrect.height;
var lx;
var ly;
if (Math.abs(adx / ady) < vratio) {
lx = start.x + adx;
ly = start.y + Math.ceil(Math.abs(adx) / vratio) * (ady < 0 ? -1 : 1);
}
else {
lx = start.x + Math.ceil(Math.abs(ady) * vratio) * (adx < 0 ? -1 : 1);
ly = start.y + ady;
}
return new go.Rect(start, new go.Point(lx, ly));
};
/**
* This method is called to change the {@link #zoomedDiagram}'s viewport to match the given rectangle.
* @param {Rect} r a rectangular bounds in document coordinates.
*/
DragZoomingTool.prototype.zoomToRect = function (r) {
if (r.width < 0.1)
return;
var diagram = this.diagram;
var observed = this.zoomedDiagram;
if (observed === null)
observed = diagram;
if (observed === null)
return;
// zoom out when using the Shift modifier
if (diagram.lastInput.shift) {
observed.scale = Math.max(observed.scale * r.width / observed.viewportBounds.width, observed.minScale);
observed.centerRect(r);
}
else {
// do scale first, so the Diagram's position normalization isn't constrained unduly when increasing scale
observed.scale = Math.min(observed.viewportBounds.width * observed.scale / r.width, observed.maxScale);
observed.position = new go.Point(r.x, r.y);
}
};
return DragZoomingTool;
}(go.Tool));
exports.DragZoomingTool = DragZoomingTool;
});