strong-arc
Version:
A visual suite for the StrongLoop API Platform
157 lines (137 loc) • 4.29 kB
JavaScript
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @constructor
* @extends {WebInspector.Object}
*/
WebInspector.ResizerWidget = function()
{
WebInspector.Object.call(this);
this._isEnabled = true;
this._isVertical = true;
this._elements = [];
this._installDragOnMouseDownBound = this._installDragOnMouseDown.bind(this);
};
WebInspector.ResizerWidget.Events = {
ResizeStart: "ResizeStart",
ResizeUpdate: "ResizeUpdate",
ResizeEnd: "ResizeEnd"
};
WebInspector.ResizerWidget.prototype = {
/**
* @return {boolean}
*/
isEnabled: function()
{
return this._isEnabled;
},
/**
* @param {boolean} enabled
*/
setEnabled: function(enabled)
{
this._isEnabled = enabled;
this._updateElementsClass();
},
/**
* @return {boolean}
*/
isVertical: function()
{
return this._isVertical;
},
/**
* Vertical widget resizes height (along y-axis).
* @param {boolean} vertical
*/
setVertical: function(vertical)
{
this._isVertical = vertical;
this._updateElementsClass();
},
/**
* @return {!Array.<!Element>}
*/
elements: function()
{
return this._elements.slice();
},
/**
* @param {!Element} element
*/
addElement: function(element)
{
if (this._elements.indexOf(element) !== -1)
return;
this._elements.push(element);
element.addEventListener("mousedown", this._installDragOnMouseDownBound, false);
element.classList.toggle("ns-resizer-widget", this._isVertical && this._isEnabled);
element.classList.toggle("ew-resizer-widget", !this._isVertical && this._isEnabled);
},
/**
* @param {!Element} element
*/
removeElement: function(element)
{
if (this._elements.indexOf(element) === -1)
return;
this._elements.remove(element);
element.removeEventListener("mousedown", this._installDragOnMouseDownBound, false);
element.classList.remove("ns-resizer-widget");
element.classList.remove("ew-resizer-widget");
},
_updateElementsClass: function()
{
for (var i = 0; i < this._elements.length; ++i) {
this._elements[i].classList.toggle("ns-resizer-widget", this._isVertical && this._isEnabled);
this._elements[i].classList.toggle("ew-resizer-widget", !this._isVertical && this._isEnabled);
}
},
/**
* @param {!Event} event
*/
_installDragOnMouseDown: function(event)
{
// Only handle drags of the nodes specified.
if (this._elements.indexOf(event.target) === -1)
return false;
WebInspector.elementDragStart(this._dragStart.bind(this), this._drag.bind(this), this._dragEnd.bind(this), this._isVertical ? "ns-resize" : "ew-resize", event);
},
/**
* @param {!MouseEvent} event
* @return {boolean}
*/
_dragStart: function(event)
{
if (!this._isEnabled)
return false;
this._startPosition = this._isVertical ? event.pageY : event.pageX;
this.dispatchEventToListeners(WebInspector.ResizerWidget.Events.ResizeStart, { startPosition: this._startPosition, currentPosition: this._startPosition });
return true;
},
/**
* @param {!MouseEvent} event
* @return {boolean}
*/
_drag: function(event)
{
if (!this._isEnabled) {
this._dragEnd(event);
return true; // Cancel drag.
}
var position = this._isVertical ? event.pageY : event.pageX;
this.dispatchEventToListeners(WebInspector.ResizerWidget.Events.ResizeUpdate, { startPosition: this._startPosition, currentPosition: position, shiftKey: event.shiftKey });
event.preventDefault();
return false; // Continue drag.
},
/**
* @param {!MouseEvent} event
*/
_dragEnd: function(event)
{
this.dispatchEventToListeners(WebInspector.ResizerWidget.Events.ResizeEnd);
delete this._startPosition;
},
__proto__: WebInspector.Object.prototype
};