monaca-lib
Version:
Monaca cloud API bindings for JavaScript
337 lines (299 loc) • 10.5 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}
* @param {!Element} element
* @param {boolean=} disableRotate
*/
WebInspector.TransformController = function(element, disableRotate)
{
this._shortcuts = {};
this.element = element;
if (this.element.tabIndex < 0)
this.element.tabIndex = 0;
this._registerShortcuts();
WebInspector.installDragHandle(element, this._onDragStart.bind(this), this._onDrag.bind(this), this._onDragEnd.bind(this), "move", null);
element.addEventListener("keydown", this._onKeyDown.bind(this), false);
element.addEventListener("keyup", this._onKeyUp.bind(this), false);
element.addEventListener("mousewheel", this._onMouseWheel.bind(this), false);
this._disableRotate = disableRotate;
this._minScale = 0;
this._maxScale = Infinity;
this._controlPanelStatusBar = new WebInspector.StatusBar();
this._controlPanelStatusBar.element.classList.add("transform-control-panel");
this._modeButtons = {};
if (!disableRotate) {
var panModeButton = new WebInspector.StatusBarButton(WebInspector.UIString("Pan mode (X)"), "pan-status-bar-item");
panModeButton.addEventListener("click", this._setMode.bind(this, WebInspector.TransformController.Modes.Pan));
this._modeButtons[WebInspector.TransformController.Modes.Pan] = panModeButton;
this._controlPanelStatusBar.appendStatusBarItem(panModeButton);
var rotateModeButton = new WebInspector.StatusBarButton(WebInspector.UIString("Rotate mode (V)"), "rotate-status-bar-item");
rotateModeButton.addEventListener("click", this._setMode.bind(this, WebInspector.TransformController.Modes.Rotate));
this._modeButtons[WebInspector.TransformController.Modes.Rotate] = rotateModeButton;
this._controlPanelStatusBar.appendStatusBarItem(rotateModeButton);
}
this._setMode(WebInspector.TransformController.Modes.Pan);
var resetButton = new WebInspector.StatusBarButton(WebInspector.UIString("Reset transform (0)"), "center-status-bar-item");
resetButton.addEventListener("click", this.resetAndNotify.bind(this, undefined));
this._controlPanelStatusBar.appendStatusBarItem(resetButton);
this._reset();
}
/**
* @enum {string}
*/
WebInspector.TransformController.Events = {
TransformChanged: "TransformChanged"
}
/**
* @enum {string}
*/
WebInspector.TransformController.Modes = {
Pan: "Pan",
Rotate: "Rotate",
}
WebInspector.TransformController.prototype = {
/**
* @return {!WebInspector.StatusBar}
*/
statusBar: function()
{
return this._controlPanelStatusBar;
},
_onKeyDown: function(event)
{
if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Shift.code) {
this._toggleMode();
return;
}
var shortcutKey = WebInspector.KeyboardShortcut.makeKeyFromEventIgnoringModifiers(event);
var handler = this._shortcuts[shortcutKey];
if (handler && handler(event))
event.consume();
},
_onKeyUp: function(event)
{
if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Shift.code)
this._toggleMode();
},
_addShortcuts: function(keys, handler)
{
for (var i = 0; i < keys.length; ++i)
this._shortcuts[keys[i].key] = handler;
},
_registerShortcuts: function()
{
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.ResetView, this.resetAndNotify.bind(this));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.PanMode, this._setMode.bind(this, WebInspector.TransformController.Modes.Pan));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.RotateMode, this._setMode.bind(this, WebInspector.TransformController.Modes.Rotate));
var zoomFactor = 1.1;
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.ZoomIn, this._onKeyboardZoom.bind(this, zoomFactor));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.ZoomOut, this._onKeyboardZoom.bind(this, 1 / zoomFactor));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.Up, this._onKeyboardPanOrRotate.bind(this, 0, -1));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.Down, this._onKeyboardPanOrRotate.bind(this, 0, 1));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.Left, this._onKeyboardPanOrRotate.bind(this, -1, 0));
this._addShortcuts(WebInspector.ShortcutsScreen.LayersPanelShortcuts.Right, this._onKeyboardPanOrRotate.bind(this, 1, 0));
},
_postChangeEvent: function()
{
this.dispatchEventToListeners(WebInspector.TransformController.Events.TransformChanged);
},
_reset: function()
{
this._scale = 1;
this._offsetX = 0;
this._offsetY = 0;
this._rotateX = 0;
this._rotateY = 0;
},
_toggleMode: function()
{
this._setMode(this._mode === WebInspector.TransformController.Modes.Pan ? WebInspector.TransformController.Modes.Rotate : WebInspector.TransformController.Modes.Pan);
},
/**
* @param {!WebInspector.TransformController.Modes} mode
*/
_setMode: function(mode)
{
if (this._mode === mode)
return;
this._mode = mode;
this._updateModeButtons();
this.element.focus();
},
_updateModeButtons: function()
{
for (var mode in this._modeButtons)
this._modeButtons[mode].setToggled(mode === this._mode);
},
/**
* @param {!Event=} event
*/
resetAndNotify: function(event)
{
this._reset();
this._postChangeEvent();
if (event)
event.preventDefault();
this.element.focus();
},
/**
* @param {number} minScale
* @param {number} maxScale
*/
setScaleConstraints: function(minScale, maxScale)
{
this._minScale = minScale;
this._maxScale = maxScale;
this._scale = Number.constrain(this._scale, minScale, maxScale);
},
/**
* @param {number} minX
* @param {number} maxX
* @param {number} minY
* @param {number} maxY
*/
clampOffsets: function(minX, maxX, minY, maxY)
{
this._offsetX = Number.constrain(this._offsetX, minX, maxX);
this._offsetY = Number.constrain(this._offsetY, minY, maxY);
},
/**
* @return {number}
*/
scale: function()
{
return this._scale;
},
/**
* @return {number}
*/
offsetX: function()
{
return this._offsetX;
},
/**
* @return {number}
*/
offsetY: function()
{
return this._offsetY;
},
/**
* @return {number}
*/
rotateX: function()
{
return this._rotateX;
},
/**
* @return {number}
*/
rotateY: function()
{
return this._rotateY;
},
/**
* @param {number} scaleFactor
* @param {number} x
* @param {number} y
*/
_onScale: function(scaleFactor, x, y)
{
scaleFactor = Number.constrain(this._scale * scaleFactor, this._minScale, this._maxScale) / this._scale;
this._scale *= scaleFactor;
this._offsetX -= (x - this._offsetX) * (scaleFactor - 1);
this._offsetY -= (y - this._offsetY) * (scaleFactor - 1);
this._postChangeEvent();
},
/**
* @param {number} offsetX
* @param {number} offsetY
*/
_onPan: function(offsetX, offsetY)
{
this._offsetX += offsetX;
this._offsetY += offsetY;
this._postChangeEvent();
},
/**
* @param {number} rotateX
* @param {number} rotateY
*/
_onRotate: function(rotateX, rotateY)
{
this._rotateX = rotateX;
this._rotateY = rotateY;
this._postChangeEvent();
},
/**
* @param {number} zoomFactor
*/
_onKeyboardZoom: function(zoomFactor)
{
this._onScale(zoomFactor, this.element.clientWidth / 2, this.element.clientHeight / 2);
},
/**
* @param {number} xMultiplier
* @param {number} yMultiplier
*/
_onKeyboardPanOrRotate: function(xMultiplier, yMultiplier)
{
var panStepInPixels = 6;
var rotateStepInDegrees = 5;
if (this._mode === WebInspector.TransformController.Modes.Rotate) {
// Sic! _onRotate treats X and Y as "rotate around X" and "rotate around Y", so swap X/Y multiplers.
this._onRotate(this._rotateX + yMultiplier * rotateStepInDegrees, this._rotateY + xMultiplier * rotateStepInDegrees);
} else {
this._onPan(xMultiplier * panStepInPixels, yMultiplier * panStepInPixels);
}
},
/**
* @param {!Event} event
*/
_onMouseWheel: function(event)
{
/** @const */
var zoomFactor = 1.1;
/** @const */
var mouseWheelZoomSpeed = 1 / 120;
var scaleFactor = Math.pow(zoomFactor, event.wheelDeltaY * mouseWheelZoomSpeed);
this._onScale(scaleFactor, event.clientX - this.element.totalOffsetLeft(), event.clientY - this.element.totalOffsetTop());
},
/**
* @param {!Event} event
*/
_onDrag: function(event)
{
if (this._mode === WebInspector.TransformController.Modes.Rotate) {
this._onRotate(this._oldRotateX + (this._originY - event.clientY) / this.element.clientHeight * 180, this._oldRotateY - (this._originX - event.clientX) / this.element.clientWidth * 180);
} else {
this._onPan(event.clientX - this._originX, event.clientY - this._originY);
this._originX = event.clientX;
this._originY = event.clientY;
}
},
/**
* @param {!MouseEvent} event
*/
_onDragStart: function(event)
{
this.element.focus();
this._originX = event.clientX;
this._originY = event.clientY;
this._oldRotateX = this._rotateX;
this._oldRotateY = this._rotateY;
return true;
},
_onDragEnd: function()
{
delete this._originX;
delete this._originY;
delete this._oldRotateX;
delete this._oldRotateY;
},
__proto__: WebInspector.Object.prototype
}