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Use a timer in plotperf

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This commit is contained in:
Zach Pomerantz 2016-04-01 19:51:05 -07:00
parent 36e04f4434
commit 41cdb29bd2
1 changed files with 27 additions and 36 deletions
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63
examples/utilities/lib/plotperf/PlotPerf.qml
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@ -19,12 +19,8 @@ Item {
// The title of the graph
property string title
// THe object used as the default source object for the prop plots
// The object used as the default source object for the prop plots
property var object
// THis is my hack to get a property and assign it to a trigger var in order to get
// a signal called whenever the value changed
property var trigger
// Plots is an array of plot descriptor
// a default plot descriptor expects the following object:
@ -55,45 +51,38 @@ Item {
property var tick : 0
function createValues() {
print("trigger is: " + JSON.stringify(trigger))
if (Array.isArray(plots)) {
for (var i =0; i < plots.length; i++) {
var plot = plots[i];
print(" a pnew Plot:" + JSON.stringify(plot));
_values.push( {
object: (plot["object"] !== undefined ? plot["object"] : root.object),
value: plot["prop"],
valueMax: 1,
numSamplesConstantMax: 0,
valueHistory: new Array(),
label: (plot["label"] !== undefined ? plot["label"] : ""),
color: (plot["color"] !== undefined ? plot["color"] : "white"),
scale: (plot["scale"] !== undefined ? plot["scale"] : 1),
unit: (plot["unit"] !== undefined ? plot["unit"] : valueUnit)
})
}
for (var i =0; i < plots.length; i++) {
var plot = plots[i];
_values.push( {
object: (plot["object"] !== undefined ? plot["object"] : root.object),
value: plot["prop"],
valueMax: 1,
numSamplesConstantMax: 0,
valueHistory: new Array(),
label: (plot["label"] !== undefined ? plot["label"] : ""),
color: (plot["color"] !== undefined ? plot["color"] : "white"),
scale: (plot["scale"] !== undefined ? plot["scale"] : 1),
unit: (plot["unit"] !== undefined ? plot["unit"] : valueUnit)
})
}
print("in creator" + JSON.stringify(_values));
pullFreshValues();
}
Component.onCompleted: {
createValues();
print(JSON.stringify(_values));
}
function pullFreshValues() {
//print("pullFreshValues");
// Wait until values are created to begin pulling
if (!_values) { return; }
var VALUE_HISTORY_SIZE = 100;
var UPDATE_CANVAS_RATE = 20;
tick++;
var currentValueMax = 0
for (var i = 0; i < _values.length; i++) {
var currentVal = _values[i].object[_values[i].value] * _values[i].scale;
var currentVal = (+_values[i].object[_values[i].value]) * _values[i].scale;
_values[i].valueHistory.push(currentVal)
_values[i].numSamplesConstantMax++;
@ -125,11 +114,13 @@ Item {
valueMax = currentValueMax;
}
if (tick % UPDATE_CANVAS_RATE == 0) {
mycanvas.requestPaint()
}
mycanvas.requestPaint()
}
Timer {
interval: 100; running: true; repeat: true
onTriggered: pullFreshValues()
}
onTriggerChanged: pullFreshValues()
Canvas {
id: mycanvas
@ -165,9 +156,9 @@ Item {
ctx.fillStyle = val.color;
var bestValue = val.valueHistory[val.valueHistory.length -1];
ctx.textAlign = "right";
ctx.fillText(displayValue(bestValue, val.unit), width, (num + 2) * lineHeight * 1.5);
ctx.fillText(displayValue(bestValue, val.unit), width, (num + 2) * lineHeight * 1);
ctx.textAlign = "left";
ctx.fillText(val.label, 0, (num + 2) * lineHeight * 1.5);
ctx.fillText(val.label, 0, (num + 2) * lineHeight * 1);
}
function displayTitle(ctx, text, maxVal) {