Timeline: Use formatTime also from QML

Change-Id: I14c8e8a216008c2dafaa2d42bd3237d33cc2b781
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/libs/timeline/qml/MainView.qml

@@ -341,6 +341,7 @@ Rectangle {
         startTime: zoomControl.selectionStart
         duration: zoomControl.selectionDuration
         endTime: zoomControl.selectionEnd
+        referenceDuration: zoomControl.rangeDuration
         showDuration: selectionRange.rangeWidth > 1
         hasContents: selectionRangeMode &&
                      selectionRange.creationState !== selectionRange.creationInactive

src/libs/timeline/qml/SelectionRangeDetails.qml

@@ -25,6 +25,7 @@
 
 import QtQuick 2.1
 import TimelineTheme 1.0
+import TimelineTimeFormatter 1.0
 
 Item {
     id: selectionRangeDetails
@@ -32,9 +33,10 @@ Item {
     signal recenter
     signal close
 
-    property string startTime
-    property string endTime
-    property string duration
+    property double startTime
+    property double endTime
+    property double duration
+    property double referenceDuration
     property bool showDuration
     property bool hasContents
 
@@ -48,16 +50,6 @@ Item {
         onHeightChanged: fitInView();
     }
 
-    function detailedPrintTime( t )
-    {
-        if (t <= 0) return "0";
-        if (t<1000) return t+" ns";
-        t = Math.floor(t/1000);
-        if (t<1000) return t+" μs";
-        if (t<1e6) return (t/1000) + " ms";
-        return (t/1e6) + " s";
-    }
-
     function fitInView() {
         // don't reposition if it does not fit
         if (parent.width < width || parent.height < height)
@@ -108,11 +100,11 @@ Item {
                 id: details
                 property var contents: [
                     qsTr("Start") + ":",
-                    detailedPrintTime(startTime),
+                    TimeFormatter.format(startTime, referenceDuration),
                     (qsTr("End") + ":"),
-                    detailedPrintTime(endTime),
+                    TimeFormatter.format(endTime, referenceDuration),
                     (qsTr("Duration") + ":"),
-                    detailedPrintTime(duration)
+                    TimeFormatter.format(duration, referenceDuration)
                 ]
 
                 model: showDuration ? 6 : 2

src/libs/timeline/qml/TimeDisplay.qml

@@ -25,6 +25,7 @@
 
 import QtQuick 2.1
 import TimelineTheme 1.0
+import TimelineTimeFormatter 1.0
 
 Item {
     id: timeDisplay
@@ -48,32 +49,6 @@ Item {
     property int contentX
     property int offsetX: contentX + Math.round((windowStart % timePerBlock) * spacing)
 
-    readonly property var timeUnits: ["μs", "ms", "s"]
-    function prettyPrintTime(t, rangeDuration) {
-        if (rangeDuration < 1)
-            return ""
-
-        var round = 1;
-        var barrier = 1;
-
-        for (var i = 0; i < timeUnits.length; ++i) {
-            barrier *= 1000;
-            if (rangeDuration < barrier)
-                round *= 1000;
-            else if (rangeDuration < barrier * 10)
-                round *= 100;
-            else if (rangeDuration < barrier * 100)
-                round *= 10;
-            if (t < barrier * 1000)
-                return Math.floor(t / (barrier / round)) / round + timeUnits[i];
-        }
-
-        t /= barrier;
-        var m = Math.floor(t / 60);
-        var s = Math.floor((t - m * 60) * round) / round;
-        return m + "m" + s + "s";
-    }
-
     Rectangle {
         anchors.left: parent.left
         anchors.right: parent.right
@@ -121,7 +96,7 @@ Item {
                     font.pixelSize: timeDisplay.fontSize
                     anchors.leftMargin: timeDisplay.textMargin
                     verticalAlignment: Text.AlignVCenter
-                    text: prettyPrintTime(column.blockStartTime, timeDisplay.rangeDuration)
+                    text: TimeFormatter.format(column.blockStartTime, timeDisplay.rangeDuration)
                     visible: width > 0
                     color: Theme.color(Theme.PanelTextColorLight)
                 }

src/libs/timeline/timelineformattime.cpp

@@ -24,6 +24,7 @@
 ****************************************************************************/
 
 #include "timelineformattime.h"
+#include <QtQml>
 
 namespace Timeline {
 
@@ -100,4 +101,18 @@ QString formatTime(qint64 timestamp, qint64 reference)
     }
 }
 
+static QObject *createFormatter(QQmlEngine *engine, QJSEngine *scriptEngine)
+{
+    Q_UNUSED(engine);
+    Q_UNUSED(scriptEngine);
+    return new TimeFormatter;
+}
+
+void TimeFormatter::setupTimeFormatter()
+{
+    static const int typeIndex = qmlRegisterSingletonType<TimeFormatter>(
+                "TimelineTimeFormatter", 1, 0, "TimeFormatter", createFormatter);
+    Q_UNUSED(typeIndex);
+}
+
 }

src/libs/timeline/timelineformattime.h

@@ -26,9 +26,22 @@
 
 #include "timeline_global.h"
 #include <QString>
+#include <QObject>
 #include <limits>
 
 namespace Timeline {
 QString TIMELINE_EXPORT formatTime(qint64 timestamp,
                                    qint64 reference = std::numeric_limits<qint64>::max());
+
+class TIMELINE_EXPORT TimeFormatter : public QObject {
+    Q_OBJECT
+public:
+    Q_INVOKABLE QString format(qint64 timestamp, qint64 reference)
+    {
+        return formatTime(timestamp, reference);
+    }
+
+    static void setupTimeFormatter();
+};
+
 }

src/plugins/qmlprofiler/qmlprofilertraceview.cpp

@@ -47,6 +47,7 @@
 #include "timeline/timelinerenderer.h"
 #include "timeline/timelineoverviewrenderer.h"
 #include "timeline/timelinetheme.h"
+#include "timeline/timelineformattime.h"
 
 #include <aggregation/aggregate.h>
 // Needed for the load&save actions in the context menu
@@ -166,6 +167,7 @@ QmlProfilerTraceView::QmlProfilerTraceView(QWidget *parent, QmlProfilerViewManag
     setMinimumHeight(170);
 
     Timeline::TimelineTheme::setupTheme(d->m_mainView->engine());
+    Timeline::TimeFormatter::setupTimeFormatter();
 
     d->m_mainView->rootContext()->setContextProperty(QLatin1String("timelineModelAggregator"),
                                                      d->m_modelProxy);