allow event source combobox to select multiple costs

This patch allows the combobox in the timelinedelegate to select
multiple costs as source.

src/models/eventmodelproxy.cpp

@@ -21,6 +21,18 @@ EventModelProxy::EventModelProxy(QObject* parent)
 
 EventModelProxy::~EventModelProxy() = default;
 
+void EventModelProxy::showCostId(qint32 costId)
+{
+    m_hiddenCostIds.remove(costId);
+    invalidate();
+}
+
+void EventModelProxy::hideCostId(qint32 costId)
+{
+    m_hiddenCostIds.insert(costId);
+    invalidate();
+}
+
 bool EventModelProxy::filterAcceptsRow(int source_row, const QModelIndex& source_parent) const
 {
     // index is invalid -> we are at the root node
@@ -31,6 +43,15 @@ bool EventModelProxy::filterAcceptsRow(int source_row, const QModelIndex& source
             return false;
     }
 
+    auto data = sourceModel()
+                    ->index(source_row, EventModel::EventsColumn, source_parent)
+                    .data(EventModel::EventsRole)
+                    .value<Data::Events>();
+
+    if (!data.empty() && m_hiddenCostIds.contains(data[0].type)) {
+        return false;
+    }
+
     return QSortFilterProxyModel::filterAcceptsRow(source_row, source_parent);
 }
 

src/models/eventmodelproxy.h

@@ -7,6 +7,7 @@
 
 #pragma once
 
+#include <QSet>
 #include <QSortFilterProxyModel>
 
 class EventModelProxy : public QSortFilterProxyModel
@@ -16,7 +17,13 @@ class EventModelProxy : public QSortFilterProxyModel
     explicit EventModelProxy(QObject* parent = nullptr);
     ~EventModelProxy() override;
 
+    void showCostId(qint32 costId);
+    void hideCostId(qint32 costId);
+
 protected:
     bool filterAcceptsRow(int source_row, const QModelIndex& source_parent) const override;
     bool lessThan(const QModelIndex& source_left, const QModelIndex& source_right) const override;
+
+private:
+    QSet<qint32> m_hiddenCostIds;
 };

src/resultsutil.cpp

@@ -18,6 +18,8 @@
 #include <QTimer>
 #include <QTreeView>
 
+#include <QStandardItemModel>
+
 #include "models/costdelegate.h"
 #include "models/data.h"
 #include "models/filterandzoomstack.h"
@@ -206,6 +208,36 @@ void fillEventSourceComboBox(QComboBox* combo, const Data::Costs& costs, const Q
     }
 }
 
+void fillEventSourceComboBoxMultiSelect(QComboBox* combo, const Data::Costs& costs, const QString& /*tooltipTemplate*/)
+{
+    // restore selection if possible
+    const auto oldData = combo->currentData();
+
+    combo->clear();
+
+    auto model = new QStandardItemModel(costs.numTypes(), 1, combo);
+    int itemCounter = 0;
+    for (int costId = 0, c = costs.numTypes(); costId < c; costId++) {
+        if (!costs.totalCost(costId)) {
+            continue;
+        }
+
+        auto item = new QStandardItem(costs.typeName(costId));
+        item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
+        item->setData(Qt::Checked, Qt::CheckStateRole);
+        item->setData(costId, Qt::UserRole + 1);
+        model->setItem(itemCounter, item);
+        itemCounter++;
+    }
+    model->setRowCount(itemCounter);
+    combo->setModel(model);
+
+    const auto index = combo->findData(oldData);
+    if (index != -1) {
+        combo->setCurrentIndex(index);
+    }
+}
+
 void setupResultsAggregation(QComboBox* costAggregationComboBox)
 {
     struct AggregationType

src/resultsutil.h

@@ -98,6 +98,7 @@ void hideEmptyColumns(const Data::Costs& costs, QTreeView* view, int numBaseColu
 void hideTracepointColumns(const Data::Costs& costs, QTreeView* view, int numBaseColumns);
 
 void fillEventSourceComboBox(QComboBox* combo, const Data::Costs& costs, const QString& tooltipTemplate);
+void fillEventSourceComboBoxMultiSelect(QComboBox* combo, const Data::Costs& costs, const QString& tooltipTemplate);
 
 void setupResultsAggregation(QComboBox* costAggregationComboBox);
 }

src/timelinewidget.cpp

@@ -17,9 +17,11 @@
 #include "parsers/perf/perfparser.h"
 
 #include <QLabel>
+#include <QListView>
 #include <QPointer>
 #include <QProgressBar>
 #include <QSortFilterProxyModel>
+#include <QStandardItemModel>
 #include <QVBoxLayout>
 
 #include <KLocalizedString>
@@ -82,9 +84,24 @@ TimeLineWidget::TimeLineWidget(PerfParser* parser, QMenu* filterMenu, FilterAndZ
     connect(timeLineProxy, &QAbstractItemModel::rowsInserted, this, [this]() { ui->timeLineView->expandToDepth(1); });
     connect(timeLineProxy, &QAbstractItemModel::modelReset, this, [this]() { ui->timeLineView->expandToDepth(1); });
 
-    connect(m_parser, &PerfParser::bottomUpDataAvailable, this, [this](const Data::BottomUpResults& data) {
-        ResultsUtil::fillEventSourceComboBox(ui->timeLineEventSource, data.costs, tr("Show timeline for %1 events."));
-    });
+    connect(m_parser, &PerfParser::bottomUpDataAvailable, this,
+            [this, timeLineProxy](const Data::BottomUpResults& data) {
+                ResultsUtil::fillEventSourceComboBoxMultiSelect(ui->timeLineEventSource, data.costs,
+                                                                tr("Show timeline for %1 events."));
+
+                auto model = qobject_cast<QStandardItemModel*>(ui->timeLineEventSource->model());
+                connect(ui->timeLineEventSource->model(), &QStandardItemModel::dataChanged, model,
+                        [timeLineProxy](const QModelIndex& topLeft, const QModelIndex& /*bottomRight*/,
+                                        const QVector<int>& /*roles*/) {
+                            auto checkState = topLeft.data(Qt::CheckStateRole).value<Qt::CheckState>();
+
+                            if (checkState == Qt::CheckState::Checked) {
+                                timeLineProxy->showCostId(topLeft.data(Qt::UserRole + 1).toUInt());
+                            } else {
+                                timeLineProxy->hideCostId(topLeft.data(Qt::UserRole + 1).toUInt());
+                            }
+                        });
+            });
 
     connect(m_parser, &PerfParser::eventsAvailable, this, [this, eventModel](const Data::EventResults& data) {
         eventModel->setData(data);