TaskTree: Add task tree adapter for task tree

Now it's possible to nest TaskTrees. A nested TaskTree
is seen as one, singular task inside parent tree.

Change-Id: Iad95de39c7b79580e0b589c222594de91d5b51a1
Reviewed-by: hjk <hjk@qt.io>

2 files changed, 19 insertions, 0 deletions

diff --git a/src/libs/utils/tasktree.cpp b/src/libs/utils/tasktree.cpp
index a11630926b..fcf47d5065 100644
--- a/src/libs/utils/tasktree.cpp
+++ b/src/libs/utils/tasktree.cpp
@@ -535,4 +535,15 @@ int TaskTree::progressValue() const
     return d->m_progressValue;
 }
 
+TaskTreeAdapter::TaskTreeAdapter()
+{
+    connect(task(), &TaskTree::done, this, [this] { emit done(true); });
+    connect(task(), &TaskTree::errorOccurred, this, [this] { emit done(false); });
+}
+
+void TaskTreeAdapter::start()
+{
+    task()->start();
+}
+
 } // namespace Utils
diff --git a/src/libs/utils/tasktree.h b/src/libs/utils/tasktree.h
index be7074893e..16c81766ee 100644
--- a/src/libs/utils/tasktree.h
+++ b/src/libs/utils/tasktree.h
@@ -255,6 +255,13 @@ private:
     TaskTreePrivate *d;
 };
 
+class QTCREATOR_UTILS_EXPORT TaskTreeAdapter : public Tasking::TaskAdapter<TaskTree>
+{
+public:
+    TaskTreeAdapter();
+    void start() final;
+};
+
 } // namespace Utils
 
 #define QTC_DECLARE_CUSTOM_TASK(CustomTaskName, TaskAdapterClass)\
@@ -266,3 +273,4 @@ template <typename ...Args>\
 using CustomTaskName = CustomTask<TaskAdapterClass<Args...>>;\
 } // namespace Utils::Tasking
 
+QTC_DECLARE_CUSTOM_TASK(Tree, Utils::TaskTreeAdapter);