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@@ -177,6 +177,20 @@ var Reveal = (function(){
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startCount: 0,
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captured: false,
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threshold: 40
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+ },
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+
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+ // Holds information about the keyboard shortcuts
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+ keyboard_shortcuts = {
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+ 'p': "Previous slide",
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+ 'n': "Next slide",
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+ 'h': "Navigate left",
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+ 'l': "Navigate right",
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+ 'k': "Navigate up",
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+ 'j': "Navigate down",
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+ 'Home': "First slide",
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+ 'End': "Last slide",
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+ 'b': "Pause",
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+ 'f': "Fullscreen"
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};
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/**
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@@ -646,6 +660,7 @@ var Reveal = (function(){
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if( config.keyboard ) {
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document.addEventListener( 'keydown', onDocumentKeyDown, false );
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+ document.addEventListener( 'keypress', onDocumentKeyPress, false );
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}
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if( config.progress && dom.progress ) {
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@@ -689,6 +704,7 @@ var Reveal = (function(){
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eventsAreBound = false;
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document.removeEventListener( 'keydown', onDocumentKeyDown, false );
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+ document.removeEventListener( 'keypress', onDocumentKeyPress, false );
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window.removeEventListener( 'hashchange', onWindowHashChange, false );
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window.removeEventListener( 'resize', onWindowResize, false );
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@@ -1019,6 +1035,44 @@ var Reveal = (function(){
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}
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+ /**
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+ * Opens a overlay window for the keyboard shortcuts.
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+ */
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+ function openShortcutsOverlay() {
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+
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+ closePreview();
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+
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+ dom.preview = document.createElement( 'div' );
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+ dom.preview.classList.add( 'preview-link-overlay' );
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+ dom.wrapper.appendChild( dom.preview );
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+
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+ var html = '<h5>Keyboard Shortcuts</h5><br/>';
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+ html += '<table> <th>KEY</th> <th>ACTION</th>';
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+ for( var key in keyboard_shortcuts ) {
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+ html += '<tr> <td>' + key + '</td> <td>' + keyboard_shortcuts[key] + '</td> </tr>'
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+ }
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+ html += '</table>';
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+
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+ dom.preview.innerHTML = [
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+ '<header>',
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+ '<a class="close" href="#"><span class="icon"></span></a>',
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+ '</header>',
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+ '<div class="viewport">',
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+ '<div class="shortcuts">'+html+'</div>',
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+ '</div>'
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+ ].join('');
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+
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+ dom.preview.querySelector( '.close' ).addEventListener( 'click', function( event ) {
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+ closePreview();
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+ event.preventDefault();
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+ }, false );
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+
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+ setTimeout( function() {
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+ dom.preview.classList.add( 'visible' );
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+ }, 1 );
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+
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+ }
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+
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/**
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* Applies JavaScript-controlled layout rules to the
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* presentation.
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@@ -2642,6 +2696,17 @@ var Reveal = (function(){
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}
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+ /**
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+ * Handler for the document level 'keypress' event.
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+ */
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+
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+ function onDocumentKeyPress( event ) {
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+ // Check if the pressed key is question mark
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+ if( event.shiftKey && event.charCode == 63 ) {
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+ openShortcutsOverlay();
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+ }
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+ }
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+
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/**
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* Handler for the document level 'keydown' event.
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*/
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