82 lines
3.8 KiB
JavaScript
82 lines
3.8 KiB
JavaScript
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/*
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SelectFilter - Turns a multiple-select box into a filter interface.
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Requires SelectBox.js and addevent.js.
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*/
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function findForm(node) {
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// returns the node of the form containing the given node
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if (node.tagName.toLowerCase() != 'form') {
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return findForm(node.parentNode);
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}
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return node;
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}
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var SelectFilter = {
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init: function(field_id) {
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var from_box = document.getElementById(field_id);
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from_box.id += '_from'; // change its ID
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// Create the INPUT input box
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var input_box = document.createElement('input');
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input_box.id = field_id + '_input';
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input_box.setAttribute('type', 'text');
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from_box.parentNode.insertBefore(input_box, from_box);
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from_box.parentNode.insertBefore(document.createElement('br'), input_box.nextSibling);
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// Create the TO box
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var to_box = document.createElement('select');
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to_box.id = field_id + '_to';
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to_box.setAttribute('multiple', 'multiple');
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to_box.setAttribute('size', from_box.size);
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from_box.parentNode.insertBefore(to_box, from_box.nextSibling);
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to_box.setAttribute('name', from_box.getAttribute('name'));
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from_box.setAttribute('name', from_box.getAttribute('name') + '_old');
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// Give the filters a CSS hook
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from_box.setAttribute('class', 'filtered');
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to_box.setAttribute('class', 'filtered');
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// Set up the JavaScript event handlers for the select box filter interface
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addEvent(input_box, 'keyup', function(e) { SelectFilter.filter_key_up(e, field_id); });
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addEvent(input_box, 'keydown', function(e) { SelectFilter.filter_key_down(e, field_id); });
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addEvent(from_box, 'dblclick', function() { SelectBox.move(field_id + '_from', field_id + '_to'); });
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addEvent(from_box, 'focus', function() { input_box.focus(); });
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addEvent(to_box, 'dblclick', function() { SelectBox.move(field_id + '_to', field_id + '_from'); });
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addEvent(findForm(from_box), 'submit', function() { SelectBox.select_all(field_id + '_to'); });
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SelectBox.init(field_id + '_from');
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SelectBox.init(field_id + '_to');
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// Move selected from_box options to to_box
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SelectBox.move(field_id + '_from', field_id + '_to');
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},
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filter_key_up: function(event, field_id) {
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from = document.getElementById(field_id + '_from');
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// don't submit form if user pressed Enter
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if ((event.which && event.which == 13) || (event.keyCode && event.keyCode == 13)) {
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from.selectedIndex = 0;
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SelectBox.move(field_id + '_from', field_id + '_to');
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from.selectedIndex = 0;
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return false;
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}
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var temp = from.selectedIndex;
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SelectBox.filter(field_id + '_from', document.getElementById(field_id + '_input').value);
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from.selectedIndex = temp;
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return true;
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},
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filter_key_down: function(event, field_id) {
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from = document.getElementById(field_id + '_from');
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// right arrow -- move across
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if ((event.which && event.which == 39) || (event.keyCode && event.keyCode == 39)) {
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var old_index = from.selectedIndex;
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SelectBox.move(field_id + '_from', field_id + '_to');
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from.selectedIndex = (old_index == from.length) ? from.length - 1 : old_index;
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return false;
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}
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// down arrow -- wrap around
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if ((event.which && event.which == 40) || (event.keyCode && event.keyCode == 40)) {
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from.selectedIndex = (from.length == from.selectedIndex + 1) ? 0 : from.selectedIndex + 1;
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}
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// up arrow -- wrap around
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if ((event.which && event.which == 38) || (event.keyCode && event.keyCode == 38)) {
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from.selectedIndex = (from.selectedIndex == 0) ? from.length - 1 : from.selectedIndex - 1;
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}
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return true;
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}
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}
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