mirror of
https://github.com/Hopiu/jquery-mobile.git
synced 2026-03-16 22:10:25 +00:00
379 lines
11 KiB
JavaScript
379 lines
11 KiB
JavaScript
/*
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* "slider" plugin
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*/
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//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
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define( [ "jquery.mobile.core", "jquery.mobile.widget", "jquery.mobile.forms.textinput", "jquery.mobile.buttonMarkup" ], function() {
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//>>excludeEnd("jqmBuildExclude");
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( function( $, undefined ) {
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$.widget( "mobile.slider", $.mobile.widget, {
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options: {
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theme: null,
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trackTheme: null,
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disabled: false,
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initSelector: "input[type='range'], :jqmData(type='range'), :jqmData(role='slider')"
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},
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_create: function() {
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// TODO: Each of these should have comments explain what they're for
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var self = this,
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control = this.element,
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parentTheme = $.mobile.getInheritedTheme( control, "c" ),
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theme = this.options.theme || parentTheme,
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trackTheme = this.options.trackTheme || parentTheme,
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cType = control[ 0 ].nodeName.toLowerCase(),
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selectClass = ( cType == "select" ) ? "ui-slider-switch" : "",
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controlID = control.attr( "id" ),
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labelID = controlID + "-label",
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label = $( "[for='"+ controlID +"']" ).attr( "id", labelID ),
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val = function() {
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return cType == "input" ? parseFloat( control.val() ) : control[0].selectedIndex;
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},
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min = cType == "input" ? parseFloat( control.attr( "min" ) ) : 0,
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max = cType == "input" ? parseFloat( control.attr( "max" ) ) : control.find( "option" ).length-1,
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step = window.parseFloat( control.attr( "step" ) || 1 ),
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slider = $( "<div class='ui-slider " + selectClass + " ui-btn-down-" + trackTheme +
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" ui-btn-corner-all' role='application'></div>" ),
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handle = $( "<a href='#' class='ui-slider-handle'></a>" )
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.appendTo( slider )
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.buttonMarkup({ corners: true, theme: theme, shadow: true })
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.attr({
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"role": "slider",
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"aria-valuemin": min,
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"aria-valuemax": max,
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"aria-valuenow": val(),
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"aria-valuetext": val(),
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"title": val(),
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"aria-labelledby": labelID
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}),
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options;
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$.extend( this, {
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slider: slider,
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handle: handle,
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dragging: false,
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beforeStart: null,
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userModified: false,
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mouseMoved: false
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});
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if ( cType == "select" ) {
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slider.wrapInner( "<div class='ui-slider-inneroffset'></div>" );
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// make the handle move with a smooth transition
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handle.addClass( "ui-slider-handle-snapping" );
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options = control.find( "option" );
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control.find( "option" ).each(function( i ) {
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var side = !i ? "b":"a",
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corners = !i ? "right" :"left",
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theme = !i ? " ui-btn-down-" + trackTheme :( " " + $.mobile.activeBtnClass );
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$( "<div class='ui-slider-labelbg ui-slider-labelbg-" + side + theme + " ui-btn-corner-" + corners + "'></div>" )
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.prependTo( slider );
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$( "<span class='ui-slider-label ui-slider-label-" + side + theme + " ui-btn-corner-" + corners + "' role='img'>" + $( this ).getEncodedText() + "</span>" )
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.prependTo( handle );
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});
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}
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label.addClass( "ui-slider" );
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// monitor the input for updated values
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control.addClass( cType === "input" ? "ui-slider-input" : "ui-slider-switch" )
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.change( function() {
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// if the user dragged the handle, the "change" event was triggered from inside refresh(); don't call refresh() again
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if (!self.mouseMoved) {
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self.refresh( val(), true );
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}
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})
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.keyup( function() { // necessary?
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self.refresh( val(), true, true );
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})
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.blur( function() {
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self.refresh( val(), true );
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});
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// prevent screen drag when slider activated
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$( document ).bind( "vmousemove", function( event ) {
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if ( self.dragging ) {
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// self.mouseMoved must be updated before refresh() because it will be used in the control "change" event
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self.mouseMoved = true;
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if ( cType === "select" ) {
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// make the handle move in sync with the mouse
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handle.removeClass( "ui-slider-handle-snapping" );
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}
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self.refresh( event );
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// only after refresh() you can calculate self.userModified
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self.userModified = self.beforeStart !== control[0].selectedIndex;
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return false;
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}
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});
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slider.bind( "vmousedown", function( event ) {
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self.dragging = true;
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self.userModified = false;
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self.mouseMoved = false;
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if ( cType === "select" ) {
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self.beforeStart = control[0].selectedIndex;
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}
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self.refresh( event );
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return false;
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});
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slider.add( document )
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.bind( "vmouseup", function() {
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if ( self.dragging ) {
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self.dragging = false;
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if ( cType === "select") {
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// make the handle move with a smooth transition
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handle.addClass( "ui-slider-handle-snapping" );
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if ( self.mouseMoved ) {
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// this is a drag, change the value only if user dragged enough
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if ( self.userModified ) {
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self.refresh( self.beforeStart == 0 ? 1 : 0 );
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}
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else {
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self.refresh( self.beforeStart );
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}
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}
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else {
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// this is just a click, change the value
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self.refresh( self.beforeStart == 0 ? 1 : 0 );
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}
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}
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self.mouseMoved = false;
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return false;
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}
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});
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slider.insertAfter( control );
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// NOTE force focus on handle
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this.handle.bind({
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focus: function() {
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slider.addClass( $.mobile.focusClass );
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},
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blur: function() {
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slider.removeClass( $.mobile.focusClass );
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},
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vmousedown: function() {
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$( this ).focus();
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},
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vclick: false,
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keydown: function( event ) {
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var index = val();
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if ( self.options.disabled ) {
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return;
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}
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// In all cases prevent the default and mark the handle as active
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switch ( event.keyCode ) {
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case $.mobile.keyCode.HOME:
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case $.mobile.keyCode.END:
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case $.mobile.keyCode.PAGE_UP:
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case $.mobile.keyCode.PAGE_DOWN:
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case $.mobile.keyCode.UP:
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case $.mobile.keyCode.RIGHT:
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case $.mobile.keyCode.DOWN:
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case $.mobile.keyCode.LEFT:
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event.preventDefault();
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if ( !self._keySliding ) {
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self._keySliding = true;
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$( this ).addClass( "ui-state-active" );
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}
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break;
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}
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// move the slider according to the keypress
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switch ( event.keyCode ) {
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case $.mobile.keyCode.HOME:
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self.refresh( min );
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break;
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case $.mobile.keyCode.END:
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self.refresh( max );
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break;
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case $.mobile.keyCode.PAGE_UP:
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case $.mobile.keyCode.UP:
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case $.mobile.keyCode.RIGHT:
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self.refresh( index + step );
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break;
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case $.mobile.keyCode.PAGE_DOWN:
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case $.mobile.keyCode.DOWN:
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case $.mobile.keyCode.LEFT:
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self.refresh( index - step );
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break;
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}
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}, // remove active mark
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keyup: function( event ) {
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if ( self._keySliding ) {
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self._keySliding = false;
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$( this ).removeClass( "ui-state-active" );
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}
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}
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});
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this.refresh(undefined, undefined, true);
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},
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refresh: function( val, isfromControl, preventInputUpdate ) {
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if ( this.options.disabled || this.element.attr('disabled')) {
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this.disable();
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}
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var control = this.element, percent,
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cType = control[0].nodeName.toLowerCase(),
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min = cType === "input" ? parseFloat( control.attr( "min" ) ) : 0,
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max = cType === "input" ? parseFloat( control.attr( "max" ) ) : control.find( "option" ).length - 1,
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step = (cType === "input" && parseFloat( control.attr( "step" ) ) > 0) ? parseFloat(control.attr("step")) : 1;
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if ( typeof val === "object" ) {
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var data = val,
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// a slight tolerance helped get to the ends of the slider
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tol = 8;
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if ( !this.dragging ||
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data.pageX < this.slider.offset().left - tol ||
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data.pageX > this.slider.offset().left + this.slider.width() + tol ) {
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return;
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}
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percent = Math.round( ( ( data.pageX - this.slider.offset().left ) / this.slider.width() ) * 100 );
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} else {
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if ( val == null ) {
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val = cType === "input" ? parseFloat( control.val() || 0 ) : control[0].selectedIndex;
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}
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percent = ( parseFloat( val ) - min ) / ( max - min ) * 100;
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}
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if ( isNaN( percent ) ) {
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return;
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}
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if ( percent < 0 ) {
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percent = 0;
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}
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if ( percent > 100 ) {
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percent = 100;
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}
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var newval = ( percent / 100 ) * ( max - min ) + min;
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//from jQuery UI slider, the following source will round to the nearest step
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var valModStep = ( newval - min ) % step;
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var alignValue = newval - valModStep;
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if ( Math.abs( valModStep ) * 2 >= step ) {
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alignValue += ( valModStep > 0 ) ? step : ( -step );
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}
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// Since JavaScript has problems with large floats, round
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// the final value to 5 digits after the decimal point (see jQueryUI: #4124)
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newval = parseFloat( alignValue.toFixed(5) );
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if ( newval < min ) {
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newval = min;
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}
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if ( newval > max ) {
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newval = max;
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}
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this.handle.css( "left", percent + "%" );
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this.handle.attr( {
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"aria-valuenow": cType === "input" ? newval : control.find( "option" ).eq( newval ).attr( "value" ),
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"aria-valuetext": cType === "input" ? newval : control.find( "option" ).eq( newval ).getEncodedText(),
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title: cType === "input" ? newval : control.find( "option" ).eq( newval ).getEncodedText()
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});
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// add/remove classes for flip toggle switch
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if ( cType === "select" ) {
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if ( newval === 0 ) {
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this.slider.addClass( "ui-slider-switch-a" )
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.removeClass( "ui-slider-switch-b" );
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} else {
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this.slider.addClass( "ui-slider-switch-b" )
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.removeClass( "ui-slider-switch-a" );
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}
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}
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if ( !preventInputUpdate ) {
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var valueChanged = false;
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// update control"s value
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if ( cType === "input" ) {
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valueChanged = control.val() !== newval;
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control.val( newval );
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} else {
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valueChanged = control[ 0 ].selectedIndex !== newval;
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control[ 0 ].selectedIndex = newval;
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}
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if ( !isfromControl && valueChanged ) {
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control.trigger( "change" );
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}
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}
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},
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enable: function() {
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this.element.attr( "disabled", false );
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this.slider.removeClass( "ui-disabled" ).attr( "aria-disabled", false );
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return this._setOption( "disabled", false );
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},
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disable: function() {
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this.element.attr( "disabled", true );
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this.slider.addClass( "ui-disabled" ).attr( "aria-disabled", true );
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return this._setOption( "disabled", true );
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}
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});
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//auto self-init widgets
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$( document ).bind( "pagecreate create", function( e ){
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$.mobile.slider.prototype.enhanceWithin( e.target );
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});
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})( jQuery );
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//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
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});
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//>>excludeEnd("jqmBuildExclude");
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