QmlProfiler: Put height of rows in the timeline into the model

Like that we can provide functionality to interactively resize rows in
the model so that one can zoom in to more interesting parts.

Change-Id: I31f14cd8aa37703240ebec744ca2e77188fb0f27
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/abstracttimelinemodel.cpp

@@ -32,6 +32,7 @@
 
 namespace QmlProfiler {
 
+static const int DefaultRowHeight = 30;
 
 AbstractTimelineModel::AbstractTimelineModel(AbstractTimelineModelPrivate *dd,
         const QString &name, const QString &label, QmlDebug::Message message,
@@ -122,6 +123,63 @@ bool AbstractTimelineModel::isEmpty() const
     return count() == 0;
 }
 
+int AbstractTimelineModel::rowHeight(int rowNumber) const
+{
+    Q_D(const AbstractTimelineModel);
+    if (!expanded())
+        return DefaultRowHeight;
+
+    if (d->rowOffsets.length() > rowNumber)
+        return d->rowOffsets[rowNumber] - (rowNumber > 0 ? d->rowOffsets[rowNumber - 1] : 0);
+    return DefaultRowHeight;
+}
+
+int AbstractTimelineModel::rowOffset(int rowNumber) const
+{
+    Q_D(const AbstractTimelineModel);
+    if (rowNumber == 0)
+        return 0;
+    if (!expanded())
+        return DefaultRowHeight * rowNumber;
+
+    if (d->rowOffsets.length() >= rowNumber)
+        return d->rowOffsets[rowNumber - 1];
+    if (!d->rowOffsets.empty())
+        return d->rowOffsets.last() + (rowNumber - 1 - d->rowOffsets.length()) * DefaultRowHeight;
+    return rowNumber * DefaultRowHeight;
+}
+
+void AbstractTimelineModel::setRowHeight(int rowNumber, int height)
+{
+    Q_D(AbstractTimelineModel);
+    if (!expanded())
+        return;
+    if (height < DefaultRowHeight)
+        height = DefaultRowHeight;
+
+    int nextOffset = d->rowOffsets.empty() ? 0 : d->rowOffsets.last();
+    while (d->rowOffsets.length() <= rowNumber)
+        d->rowOffsets << (nextOffset += DefaultRowHeight);
+    int difference = height - d->rowOffsets[rowNumber] +
+            (rowNumber > 0 ? d->rowOffsets[rowNumber - 1] : 0);
+    if (difference != 0) {
+        for (; rowNumber < d->rowOffsets.length(); ++rowNumber) {
+            d->rowOffsets[rowNumber] += difference;
+        }
+        emit rowHeightChanged();
+    }
+}
+
+int AbstractTimelineModel::height() const
+{
+    Q_D(const AbstractTimelineModel);
+    int depth = rowCount();
+    if (!expanded() || d->rowOffsets.empty())
+        return depth * DefaultRowHeight;
+
+    return d->rowOffsets.last() + (depth - d->rowOffsets.length()) * DefaultRowHeight;
+}
+
 qint64 AbstractTimelineModel::traceStartTime() const
 {
     Q_D(const AbstractTimelineModel);
@@ -192,6 +250,8 @@ void AbstractTimelineModel::dataChanged()
     default:
         break;
     }
+
+    d->rowOffsets.clear();
 }
 
 bool AbstractTimelineModel::eventAccepted(const QmlProfilerDataModel::QmlEventTypeData &event) const

src/plugins/qmlprofiler/abstracttimelinemodel.h

@@ -54,6 +54,11 @@ public:
     bool isEmpty() const;
 
     // Methods are directly passed on to the private model and relying on its virtual methods.
+    int rowHeight(int rowNumber) const;
+    int rowOffset(int rowNumber) const;
+    void setRowHeight(int rowNumber, int height);
+    int height() const;
+
     Q_INVOKABLE qint64 lastTimeMark() const;
     Q_INVOKABLE qint64 traceStartTime() const;
     Q_INVOKABLE qint64 traceEndTime() const;
@@ -91,6 +96,7 @@ public:
 
 signals:
     void expandedChanged();
+    void rowHeightChanged();
 
 protected:
     enum BoxColorProperties {

src/plugins/qmlprofiler/abstracttimelinemodel_p.h

@@ -47,6 +47,7 @@ public:
     virtual int findFirstIndexNoParents(qint64 startTime) const = 0;
     virtual int findLastIndex(qint64 endTime) const = 0;
 
+    QVector<int> rowOffsets;
     QString name;
     QmlProfilerModelManager *modelManager;
     int modelId;

src/plugins/qmlprofiler/qml/CategoryLabel.qml

@@ -32,30 +32,25 @@ import QtQuick 2.1
 Item {
     id: labelContainer
     property string text: qmlProfilerModelProxy.title(modelIndex)
-    property bool expanded: false
-    property int modelIndex: index;
-
+    property bool expanded: trigger(qmlProfilerModelProxy.expanded(modelIndex))
+    property int modelIndex: index
+    property int bindingTrigger: 1
     property var descriptions: []
     property var extdescriptions: []
     property var eventIds: []
 
-    visible: qmlProfilerModelProxy.rowCount(modelIndex) > 0;
-
-    height: root.singleRowHeight
-    width: 150
-
-    Component.onCompleted: {
-        updateHeight();
+    function trigger(i) {
+        return i * bindingTrigger * bindingTrigger;
     }
 
-    function updateHeight() {
-        height = root.singleRowHeight * qmlProfilerModelProxy.rowCount(modelIndex);
-    }
+    visible: trigger(qmlProfilerModelProxy.rowCount(modelIndex)) > 0
+
+    height: trigger(qmlProfilerModelProxy.height(modelIndex))
+    width: 150
 
     function getDescriptions() {
-        expanded = qmlProfilerModelProxy.expanded(modelIndex);
+        bindingTrigger = -bindingTrigger;
         backgroundMarks.requestPaint();
-        visible = qmlProfilerModelProxy.rowCount(modelIndex) > 0;
         if (!visible)
             return;
 
@@ -71,18 +66,13 @@ Item {
         descriptions = desc;
         eventIds = ids;
         extdescriptions = extdesc;
-        updateHeight();
     }
 
     Connections {
         target: qmlProfilerModelProxy
-        onExpandedChanged: {
-            getDescriptions();
-        }
-
-        onStateChanged: {
-            getDescriptions();
-        }
+        onExpandedChanged: getDescriptions();
+        onStateChanged: getDescriptions()
+        onRowHeightChanged: getDescriptions()
     }
 
     Text {
@@ -91,7 +81,7 @@ Item {
         font.pixelSize: 12
         text: labelContainer.text
         color: "#232323"
-        height: root.singleRowHeight
+        height: trigger(qmlProfilerModelProxy.rowHeight(modelIndex, 0))
         width: 140
         verticalAlignment: Text.AlignVCenter
     }
@@ -105,20 +95,21 @@ Item {
     }
 
     Column {
-        y: root.singleRowHeight
+        anchors.top: txt.bottom
         visible: expanded
         Repeater {
             model: descriptions.length
             Rectangle {
                 width: labelContainer.width
-                height: root.singleRowHeight
+                height: trigger(qmlProfilerModelProxy.rowHeight(modelIndex, index + 1))
                 color: "#eaeaea"
                 border.width: 1
                 border.color:"#c8c8c8"
                 Text {
-                    height: root.singleRowHeight
-                    x: 5
-                    width: 140
+                    anchors.fill: parent
+                    anchors.leftMargin: 5
+                    anchors.rightMargin: 5
+
                     text: descriptions[index]
                     textFormat: Text.PlainText
                     elide: Text.ElideRight
@@ -143,7 +134,7 @@ Item {
     Image {
         source: expanded ? "arrow_down.png" : "arrow_right.png"
         x: parent.width - 12
-        y: Math.floor((root.singleRowHeight - height) / 2)
+        y: 9
         smooth: false
         MouseArea {
             anchors.fill: parent

src/plugins/qmlprofiler/qml/MainView.qml

@@ -36,8 +36,6 @@ Rectangle {
 
     // ***** properties
 
-    property int singleRowHeight: 30
-
     property alias selectionLocked : view.selectionLocked
     property bool lockItemSelection : false
 

src/plugins/qmlprofiler/qml/TimeMarks.qml

@@ -102,21 +102,30 @@ Canvas {
     function drawBackgroundBars( context, region ) {
         var colorIndex = true;
 
-        // row background
-        var backgroundOffset = y < 0 ? -y : -(y % (2 * root.singleRowHeight));
-        for (var currentY= backgroundOffset; currentY < Math.min(height, labels.height - y); currentY += root.singleRowHeight) {
-            context.fillStyle = colorIndex ? "#f0f0f0" : "white";
-            context.strokeStyle = colorIndex ? "#f0f0f0" : "white";
-            context.fillRect(0, currentY, width, root.singleRowHeight);
-            colorIndex = !colorIndex;
-        }
-
         // separators
-        var cumulatedHeight = 0;
-        for (var modelIndex = 0; modelIndex < qmlProfilerModelProxy.modelCount() && cumulatedHeight < y + height; modelIndex++) {
-            cumulatedHeight += root.singleRowHeight * qmlProfilerModelProxy.rowCount(modelIndex);
-            if (cumulatedHeight < y)
+        var cumulatedHeight = y < 0 ? -y : 0;
+        for (var modelIndex = 0; modelIndex < qmlProfilerModelProxy.modelCount(); ++modelIndex) {
+            var modelHeight = qmlProfilerModelProxy.height(modelIndex);
+            if (cumulatedHeight + modelHeight < y) {
+                cumulatedHeight += modelHeight;
+                if (qmlProfilerModelProxy.rowCount(modelIndex) % 2 !== 0)
+                    colorIndex = !colorIndex;
                 continue;
+            }
+
+            for (var row = 0; row < qmlProfilerModelProxy.rowCount(modelIndex); ++row) {
+                // row background
+                var rowHeight = qmlProfilerModelProxy.rowHeight(modelIndex, row)
+                cumulatedHeight += rowHeight;
+                colorIndex = !colorIndex;
+                if (cumulatedHeight < y - rowHeight)
+                    continue;
+                context.strokeStyle = context.fillStyle = colorIndex ? "#f0f0f0" : "white";
+                context.fillRect(0, cumulatedHeight - rowHeight - y, width, rowHeight);
+
+                if (cumulatedHeight > y + height)
+                    return;
+            }
 
             context.strokeStyle = "#B0B0B0";
             context.beginPath();

src/plugins/qmlprofiler/timelinemodelaggregator.cpp

@@ -91,6 +91,7 @@ void TimelineModelAggregator::addModel(AbstractTimelineModel *m)
 {
     d->modelList << m;
     connect(m,SIGNAL(expandedChanged()),this,SIGNAL(expandedChanged()));
+    connect(m,SIGNAL(rowHeightChanged()),this,SIGNAL(rowHeightChanged()));
 }
 
 QStringList TimelineModelAggregator::categoryTitles() const
@@ -141,6 +142,26 @@ qint64 TimelineModelAggregator::lastTimeMark() const
     return mark;
 }
 
+int TimelineModelAggregator::height(int modelIndex) const
+{
+    return d->modelList[modelIndex]->height();
+}
+
+int TimelineModelAggregator::rowHeight(int modelIndex, int row) const
+{
+    return d->modelList[modelIndex]->rowHeight(row);
+}
+
+int TimelineModelAggregator::rowOffset(int modelIndex, int row) const
+{
+    return d->modelList[modelIndex]->rowOffset(row);
+}
+
+void TimelineModelAggregator::setRowHeight(int modelIndex, int row, int height)
+{
+    d->modelList[modelIndex]->setRowHeight(row, height);
+}
+
 bool TimelineModelAggregator::expanded(int modelIndex) const
 {
     return d->modelList[modelIndex]->expanded();

src/plugins/qmlprofiler/timelinemodelaggregator.h

@@ -62,6 +62,10 @@ public:
 
     Q_INVOKABLE qint64 lastTimeMark() const;
 
+    Q_INVOKABLE int height(int modelIndex) const;
+    Q_INVOKABLE int rowHeight(int modelIndex, int row) const;
+    Q_INVOKABLE void setRowHeight(int modelIndex, int row, int height);
+    Q_INVOKABLE int rowOffset(int modelIndex, int row) const;
     Q_INVOKABLE bool expanded(int modelIndex) const;
     Q_INVOKABLE void setExpanded(int modelIndex, bool expanded);
     Q_INVOKABLE int rowCount(int modelIndex) const;
@@ -93,6 +97,7 @@ signals:
     void dataAvailable();
     void stateChanged();
     void expandedChanged();
+    void rowHeightChanged();
 
 protected slots:
     void dataChanged();

src/plugins/qmlprofiler/timelinerenderer.cpp

@@ -41,8 +41,6 @@
 
 using namespace QmlProfiler::Internal;
 
-const int DefaultRowHeight = 30;
-
 TimelineRenderer::TimelineRenderer(QQuickPaintedItem *parent) :
     QQuickPaintedItem(parent), m_startTime(0), m_endTime(0), m_spacing(0), m_spacedDuration(0),
     m_lastStartTime(0), m_lastEndTime(0)
@@ -130,18 +128,20 @@ void TimelineRenderer::drawItemsToPainter(QPainter *p, int modelIndex, int fromI
     p->setPen(Qt::transparent);
     int modelRowStart = 0;
     for (int mi = 0; mi < modelIndex; mi++)
-        modelRowStart += m_profilerModelProxy->rowCount(mi);
+        modelRowStart += m_profilerModelProxy->height(mi);
 
     for (int i = fromIndex; i <= toIndex; i++) {
         int currentX, currentY, itemWidth, itemHeight;
 
         int rowNumber = m_profilerModelProxy->getEventRow(modelIndex, i);
-        currentY = (modelRowStart + rowNumber) * DefaultRowHeight - y();
+        currentY = modelRowStart + m_profilerModelProxy->rowOffset(modelIndex, rowNumber) - y();
         if (currentY >= height())
             continue;
 
-        itemHeight = DefaultRowHeight * m_profilerModelProxy->getHeight(modelIndex, i);
-        currentY += DefaultRowHeight - itemHeight;
+        itemHeight = m_profilerModelProxy->rowHeight(modelIndex, rowNumber) *
+                m_profilerModelProxy->getHeight(modelIndex, i);
+
+        currentY += m_profilerModelProxy->rowHeight(modelIndex, rowNumber) - itemHeight;
         if (currentY + itemHeight < 0)
             continue;
 
@@ -164,7 +164,7 @@ void TimelineRenderer::drawSelectionBoxes(QPainter *p, int modelIndex, int fromI
 
     int modelRowStart = 0;
     for (int mi = 0; mi < modelIndex; mi++)
-        modelRowStart += m_profilerModelProxy->rowCount(mi);
+        modelRowStart += m_profilerModelProxy->height(mi);
 
     p->save();
 
@@ -183,16 +183,19 @@ void TimelineRenderer::drawSelectionBoxes(QPainter *p, int modelIndex, int fromI
         if (m_profilerModelProxy->getEventId(modelIndex, i) != id)
             continue;
 
-        currentY = (modelRowStart + m_profilerModelProxy->getEventRow(modelIndex, i)) * DefaultRowHeight - y();
-        if (currentY + DefaultRowHeight < 0 || height() < currentY)
+        int row = m_profilerModelProxy->getEventRow(modelIndex, i);
+        int rowHeight = m_profilerModelProxy->rowHeight(modelIndex, row);
+
+        currentY = modelRowStart + m_profilerModelProxy->rowOffset(modelIndex, row) - y();
+        if (currentY + rowHeight < 0 || height() < currentY)
             continue;
 
         getItemXExtent(modelIndex, i, currentX, itemWidth);
 
         if (i == m_selectedItem)
-            selectedItemRect = QRect(currentX, currentY - 1, itemWidth, DefaultRowHeight + 1);
+            selectedItemRect = QRect(currentX, currentY - 1, itemWidth, rowHeight + 1);
         else
-            p->drawRect(currentX, currentY, itemWidth, DefaultRowHeight);
+            p->drawRect(currentX, currentY, itemWidth, rowHeight);
     }
 
     // draw the selected item rectangle the last, so that it's overlayed
@@ -209,7 +212,7 @@ void TimelineRenderer::drawBindingLoopMarkers(QPainter *p, int modelIndex, int f
     int destindex;
     int xfrom, xto, width;
     int yfrom, yto;
-    int radius = DefaultRowHeight / 3;
+    int radius = 10;
     QPen shadowPen = QPen(QColor("grey"),2);
     QPen markerPen = QPen(QColor("orange"),2);
     QBrush shadowBrush = QBrush(QColor("grey"));
@@ -222,12 +225,14 @@ void TimelineRenderer::drawBindingLoopMarkers(QPainter *p, int modelIndex, int f
             // to
             getItemXExtent(modelIndex, destindex, xto, width);
             xto += width / 2;
-            yto = getYPosition(modelIndex, destindex) + DefaultRowHeight / 2 - y();
+            yto = getYPosition(modelIndex, destindex) +
+                    m_profilerModelProxy->rowHeight(modelIndex, destindex) / 2 - y();
 
             // from
             getItemXExtent(modelIndex, i, xfrom, width);
             xfrom += width / 2;
-            yfrom = getYPosition(modelIndex, i) + DefaultRowHeight / 2 - y();
+            yfrom = getYPosition(modelIndex, i) +
+                    m_profilerModelProxy->rowHeight(modelIndex, i) / 2 - y();
 
             // radius (derived from width of origin event)
             radius = 5;
@@ -260,11 +265,29 @@ void TimelineRenderer::drawBindingLoopMarkers(QPainter *p, int modelIndex, int f
     p->restore();
 }
 
+int TimelineRenderer::rowFromPosition(int y)
+{
+    int ret = 0;
+    for (int modelIndex = 0; modelIndex < m_profilerModelProxy->modelCount(); modelIndex++) {
+        int modelHeight = m_profilerModelProxy->height(modelIndex);
+        if (y < modelHeight) {
+            for (int row = 0; row < m_profilerModelProxy->rowCount(modelIndex); ++row) {
+                y -= m_profilerModelProxy->rowHeight(modelIndex, row);
+                if (y < 0) return ret;
+                ++ret;
+            }
+        } else {
+            y -= modelHeight;
+            ret += m_profilerModelProxy->rowCount(modelIndex);
+        }
+    }
+    return ret;
+}
+
 int TimelineRenderer::modelFromPosition(int y)
 {
-    y = y / DefaultRowHeight;
     for (int modelIndex = 0; modelIndex < m_profilerModelProxy->modelCount(); modelIndex++) {
-        y -= m_profilerModelProxy->rowCount(modelIndex);
+        y -= m_profilerModelProxy->height(modelIndex);
         if (y < 0)
             return modelIndex;
     }
@@ -328,7 +351,7 @@ void TimelineRenderer::manageHovered(int mouseX, int mouseY)
     // Make the "selected" area 3 pixels wide by adding/subtracting 1 to catch very narrow events.
     qint64 startTime = (mouseX - 1) * (m_endTime - m_startTime) / width() + m_startTime;
     qint64 endTime = (mouseX + 1) * (m_endTime - m_startTime) / width() + m_startTime;
-    int row = (mouseY + y()) / DefaultRowHeight;
+    int row = rowFromPosition(mouseY + y());
     int modelIndex = modelFromPosition(mouseY + y());
 
     // already covered? nothing to do
@@ -404,10 +427,10 @@ int TimelineRenderer::getYPosition(int modelIndex, int index) const
 
     int modelRowStart = 0;
     for (int mi = 0; mi < modelIndex; mi++)
-        modelRowStart += m_profilerModelProxy->rowCount(mi);
+        modelRowStart += m_profilerModelProxy->height(mi);
 
-    int y = DefaultRowHeight * (modelRowStart + m_profilerModelProxy->getEventRow(modelIndex, index));
-    return y;
+    return modelRowStart + m_profilerModelProxy->rowOffset(modelIndex,
+            m_profilerModelProxy->getEventRow(modelIndex, index));
 }
 
 void TimelineRenderer::selectNext()

src/plugins/qmlprofiler/timelinerenderer.h

@@ -172,6 +172,7 @@ private:
     void drawSelectionBoxes(QPainter *p, int modelIndex, int fromIndex, int toIndex);
     void drawBindingLoopMarkers(QPainter *p, int modelIndex, int fromIndex, int toIndex);
     int modelFromPosition(int y);
+    int rowFromPosition(int y);
 
     void manageClicked();
     void manageHovered(int mouseX, int mouseY);