Timeline: Provide a method to set all timeline models at once

Setting a number of models one by one results in quadratic overhead
when (re)building the UI. If there are many models this quickly gets
out of hand.

Change-Id: I7f017784c3f0a6a9d7e52c881eb1d8ca4cf70886
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/libs/timeline/timelinemodelaggregator.cpp

@@ -70,6 +70,30 @@ void TimelineModelAggregator::addModel(TimelineModel *m)
         emit heightChanged();
 }
 
+void TimelineModelAggregator::setModels(const QList<TimelineModel *> &models)
+{
+    Q_D(TimelineModelAggregator);
+    if (d->modelList == models)
+        return;
+
+    int prevHeight = height();
+    foreach (TimelineModel *m, d->modelList) {
+        disconnect(m, &TimelineModel::heightChanged, this, &TimelineModelAggregator::heightChanged);
+        if (d->notesModel)
+            d->notesModel->removeTimelineModel(m);
+    }
+
+    d->modelList = models;
+    foreach (TimelineModel *m, models) {
+        connect(m, &TimelineModel::heightChanged, this, &TimelineModelAggregator::heightChanged);
+        if (d->notesModel)
+            d->notesModel->addTimelineModel(m);
+    }
+    emit modelsChanged();
+    if (height() != prevHeight)
+        emit heightChanged();
+}
+
 const TimelineModel *TimelineModelAggregator::model(int modelIndex) const
 {
     Q_D(const TimelineModelAggregator);

src/libs/timeline/timelinemodelaggregator.h

@@ -43,6 +43,7 @@ public:
     int height() const;
 
     void addModel(TimelineModel *m);
+    void setModels(const QList<TimelineModel *> &models);
     const TimelineModel *model(int modelIndex) const;
     QVariantList models() const;
 

src/libs/timeline/timelinenotesmodel.cpp

@@ -52,8 +52,9 @@ int TimelineNotesModel::count() const
 void TimelineNotesModel::addTimelineModel(const TimelineModel *timelineModel)
 {
     Q_D(TimelineNotesModel);
-    connect(timelineModel, SIGNAL(destroyed(QObject*)),
-            this, SLOT(_q_removeTimelineModel(QObject*)));
+    connect(timelineModel, &QObject::destroyed, this, [this](QObject *obj) {
+        removeTimelineModel(static_cast<TimelineModel *>(obj));
+    });
     d->timelineModels.insert(timelineModel->modelId(), timelineModel);
 }
 
@@ -178,11 +179,12 @@ void TimelineNotesModel::resetModified()
     d->modified = false;
 }
 
-void TimelineNotesModel::TimelineNotesModelPrivate::_q_removeTimelineModel(QObject *timelineModel)
+void TimelineNotesModel::removeTimelineModel(const TimelineModel *timelineModel)
 {
-    for (auto i = timelineModels.begin(); i != timelineModels.end();) {
+    Q_D(TimelineNotesModel);
+    for (auto i = d->timelineModels.begin(); i != d->timelineModels.end();) {
         if (i.value() == timelineModel)
-            i = timelineModels.erase(i);
+            i = d->timelineModels.erase(i);
         else
             ++i;
     }

src/libs/timeline/timelinenotesmodel.h

@@ -39,6 +39,7 @@ public:
 
     int count() const;
     void addTimelineModel(const TimelineModel *timelineModel);
+    void removeTimelineModel(const TimelineModel *timelineModel);
     QList<const TimelineModel *> timelineModels() const;
 
     Q_INVOKABLE int typeId(int index) const;
@@ -73,7 +74,6 @@ private:
     TimelineNotesModelPrivate *d_ptr;
 
     Q_DECLARE_PRIVATE(TimelineNotesModel)
-    Q_PRIVATE_SLOT(d_ptr, void _q_removeTimelineModel(QObject *timelineModel))
 };
 
 } // namespace Timeline

src/libs/timeline/timelinenotesmodel_p.h

@@ -46,8 +46,6 @@ public:
     QHash<int, const TimelineModel *> timelineModels;
     bool modified;
 
-    void _q_removeTimelineModel(QObject *model);
-
 private:
     TimelineNotesModel *q_ptr;
     Q_DECLARE_PUBLIC(TimelineNotesModel)