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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
ONOS GUI -- Layer -- Flash Service
Provides a mechanism to flash short informational messages to the screen
to alert the user of something, e.g. "Hosts visible" or "Hosts hidden".
*/
(function () {
'use strict';
// injected references
var $log, $timeout;
// configuration
var defaultSettings = {
fade: 200,
showFor: 1200
},
w = '100%',
h = 200,
xpad = 20,
ypad = 10,
rx = 10,
vbox = '-200 -' + (h/2) + ' 400 ' + h;
// internal state
var settings,
timer = null,
data = [],
enabled;
// DOM elements
var flashDiv, svg;
function computeBox(el) {
var text = el.select('text'),
box = text.node().getBBox();
// center
box.x = -box.width / 2;
box.y = -box.height / 2;
// add some padding
box.x -= xpad;
box.width += xpad * 2;
box.y -= ypad;
box.height += ypad * 2;
return box;
}
function updateFlash() {
if (!svg) {
svg = flashDiv.append('svg').attr({
width: w,
height: h,
viewBox: vbox
});
}
var items = svg.selectAll('.flashItem')
.data(data);
// this is when there is an existing item
items.each(function (msg) {
var el = d3.select(this),
box;
el.select('text').text(msg);
box = computeBox(el);
el.select('rect').attr(box);
});
// this is when there is no existing item
var entering = items.enter()
.append('g')
.attr({
class: 'flashItem',
opacity: 0
})
.transition()
.duration(settings.fade)
.attr('opacity', 1);
entering.each(function (msg) {
var el = d3.select(this),
box;
el.append('rect').attr('rx', rx);
el.append('text').text(msg);
box = computeBox(el);
el.select('rect').attr(box);
});
items.exit()
.transition()
.duration(settings.fade)
.attr('opacity', 0)
.remove();
if (svg && data.length === 0) {
svg.transition()
.delay(settings.fade + 10)
.remove();
svg = null;
}
}
function flash(msg) {
if (!enabled) return;
if (timer) {
$timeout.cancel(timer);
}
timer = $timeout(function () {
data = [];
updateFlash();
}, settings.showFor);
data = [msg];
updateFlash();
}
function enable(b) {
enabled = !!b;
}
angular.module('onosLayer')
.factory('FlashService', ['$log', '$timeout',
function (_$log_, _$timeout_) {
$log = _$log_;
$timeout = _$timeout_;
function initFlash(opts) {
settings = angular.extend({}, defaultSettings, opts);
flashDiv = d3.select('#flash');
enabled = true;
}
return {
initFlash: initFlash,
flash: flash,
enable: enable
};
}]);
}());
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