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Simplified wheel processing.

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This commit is contained in:
Yury Delendik 2016-09-27 15:27:42 -05:00
parent 6c263c1994
commit 223a18ccc8
3 changed files with 56 additions and 31 deletions
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27
web/pdf_presentation_mode.js
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@ -17,13 +17,15 @@
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
define('pdfjs-web/pdf_presentation_mode', ['exports'], factory);
define('pdfjs-web/pdf_presentation_mode', ['exports', 'pdfjs-web/ui_utils'],
factory);
} else if (typeof exports !== 'undefined') {
factory(exports);
factory(exports, require('./ui_utils.js'));
} else {
factory((root.pdfjsWebPDFPresentationMode = {}));
factory((root.pdfjsWebPDFPresentationMode = {}), root.pdfjsWebUIUtils);
}
}(this, function (exports) {
}(this, function (exports, uiUtils) {
var normalizeWheelEventDelta = uiUtils.normalizeWheelEventDelta;
var DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS = 1500; // in ms
var DELAY_BEFORE_HIDING_CONTROLS = 3000; // in ms
@ -120,16 +122,19 @@ var PDFPresentationMode = (function PDFPresentationModeClosure() {
},
/**
* Switches page when the user scrolls (using a scroll wheel or a touchpad)
* with large enough motion, to prevent accidental page switches.
* @param {number} delta - The delta value from the mouse event.
* @private
*/
mouseScroll: function PDFPresentationMode_mouseScroll(delta) {
_mouseWheel: function PDFPresentationMode_mouseWheel(evt) {
if (!this.active) {
return;
}
evt.preventDefault();
var delta = normalizeWheelEventDelta(evt);
var MOUSE_SCROLL_COOLDOWN_TIME = 50;
var PAGE_SWITCH_THRESHOLD = 120;
var PAGE_SWITCH_THRESHOLD = 0.1;
var PageSwitchDirection = {
UP: -1,
DOWN: 1
@ -340,11 +345,13 @@ var PDFPresentationMode = (function PDFPresentationModeClosure() {
_addWindowListeners: function PDFPresentationMode_addWindowListeners() {
this.showControlsBind = this._showControls.bind(this);
this.mouseDownBind = this._mouseDown.bind(this);
this.mouseWheelBind = this._mouseWheel.bind(this);
this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);
this.contextMenuBind = this._contextMenu.bind(this);
window.addEventListener('mousemove', this.showControlsBind);
window.addEventListener('mousedown', this.mouseDownBind);
window.addEventListener('wheel', this.mouseWheelBind);
window.addEventListener('keydown', this.resetMouseScrollStateBind);
window.addEventListener('contextmenu', this.contextMenuBind);
},
@ -356,11 +363,13 @@ var PDFPresentationMode = (function PDFPresentationModeClosure() {
function PDFPresentationMode_removeWindowListeners() {
window.removeEventListener('mousemove', this.showControlsBind);
window.removeEventListener('mousedown', this.mouseDownBind);
window.removeEventListener('wheel', this.mouseWheelBind);
window.removeEventListener('keydown', this.resetMouseScrollStateBind);
window.removeEventListener('contextmenu', this.contextMenuBind);
delete this.showControlsBind;
delete this.mouseDownBind;
delete this.mouseWheelBind;
delete this.resetMouseScrollStateBind;
delete this.contextMenuBind;
},