add runningchart widget

this adds a new component 'runningchart', which is a simple linegraph

you define a timeFrame (default 5*60 seconds), and you regularly add
datapoints to it, and the graph shows the last timeFrame seconds of it

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

www/manager6/Makefile

@@ -75,6 +75,7 @@ JSSRC= 				                 	\
 	panel/GuestStatusView.js			\
 	panel/RRDView.js				\
 	panel/RRDChart.js				\
+	panel/RunningChart.js				\
 	panel/InfoWidget.js				\
 	panel/TemplateStatusView.js			\
 	panel/InputPanel.js				\

www/manager6/panel/RunningChart.js

@@ -0,0 +1,163 @@
+/*
+ * This is a running chart widget
+ * you add time datapoints to it,
+ * and we only show the last x of it
+ * used for ceph performance charts
+ */
+Ext.define('PVE.widget.RunningChart', {
+    extend: 'Ext.container.Container',
+    alias: 'widget.pveRunningChart',
+
+    layout: {
+	type: 'hbox',
+	align: 'center'
+    },
+    items: [
+	{
+	    width: 80,
+	    xtype: 'box',
+	    itemId: 'title',
+	    data: {
+		title: ''
+	    },
+	    tpl: '<h3>{title}:</h3>'
+	},
+	{
+	    flex: 1,
+	    xtype: 'cartesian',
+	    height: '100%',
+	    itemId: 'chart',
+	    border: false,
+	    axes: [
+		{
+		    type: 'numeric',
+		    position: 'left',
+		    hidden: true,
+		    minimum: 0
+		},
+		{
+		    type: 'numeric',
+		    position: 'bottom',
+		    hidden: true
+		}
+	    ],
+
+	    store: {
+		data: {}
+	    },
+
+	    sprites: [{
+		id: 'valueSprite',
+		type: 'text',
+		text: '0 B/s',
+		textAlign: 'end',
+		textBaseline: 'middle',
+		fontSize: 14
+	    }],
+
+	    series: [{
+		type: 'line',
+		xField: 'time',
+		yField: 'val',
+		fill: 'true',
+		colors: ['#cfcfcf'],
+		tooltip: {
+		    trackMouse: true,
+		    renderer: function( tooltip, record, ctx) {
+			var me = this.getChart();
+			var date = new Date(record.data.time);
+			var value = me.up().renderer(record.data.val);
+			tooltip.setHtml(
+			    me.up().title + ': ' + value + '<br />' +
+			    Ext.Date.format(date, 'H:i:s')
+			);
+		    }
+		},
+		style: {
+		    lineWidth: 1.5,
+		    opacity: 0.60
+		},
+		marker: {
+		    opacity: 0,
+		    scaling: 0.01,
+		    fx: {
+			duration: 200,
+			easing: 'easeOut'
+		    }
+		},
+		highlightCfg: {
+		    opacity: 1,
+		    scaling: 1.5
+		}
+	    }]
+	}
+    ],
+
+    // the renderer for the tooltip and last value,
+    // default just the value
+    renderer: Ext.identityFn,
+
+    // show the last x seconds
+    // default is 5 minutes
+    timeFrame: 5*60,
+
+    addDataPoint: function(value, time) {
+	var me = this.chart;
+	var panel = me.up();
+	var now = new Date();
+	var begin = new Date(now.getTime() - (1000*panel.timeFrame));
+
+	me.store.add({
+	    time: time || now.getTime(),
+	    val: value || 0
+	});
+
+	// delete all old records when we have 20 times more datapoints
+	// than seconds in our timeframe (so even a subsecond graph does
+	// not trigger this often)
+	//
+	// records in the store do not take much space, but like this,
+	// we prevent a memory leak when someone has the site open for a long time
+	// with minimal graphical glitches
+	if (me.store.count() > panel.timeFrame * 20) {
+	    var oldData = me.store.getData().createFiltered(function(item) {
+		return item.data.time < begin.getTime();
+	    });
+
+	    me.store.remove(oldData.getRange());
+	}
+
+	me.timeaxis.setMinimum(begin.getTime());
+	me.timeaxis.setMaximum(now.getTime());
+	me.valuesprite.setText(panel.renderer(value || 0).toString());
+	me.valuesprite.setAttributes({
+	    x: me.getWidth() - 15,
+	    y: me.getHeight()/2
+	}, true);
+	me.redraw();
+    },
+
+    setTitle: function(title) {
+	this.title = title;
+	var me = this.getComponent('title');
+	me.update({title: title});
+    },
+
+    initComponent: function(){
+	var me = this;
+	me.callParent();
+
+	if (me.title) {
+	    me.getComponent('title').update({title: me.title});
+	}
+	me.chart = me.getComponent('chart');
+	me.chart.timeaxis = me.chart.getAxes()[1];
+	me.chart.valuesprite = me.chart.getSurface('chart').get('valueSprite');
+	if (me.color) {
+	    me.chart.series[0].setStyle({
+		fill: me.color,
+		stroke: me.color
+	    });
+	}
+    }
+});