TaskTree: Introduce ParallelLimit

The parallel limit constrains the number of parallel tasks
run in the same time. So, if e.g. a group contains 10 children
and the parallel limit is 6, only first 6 tasks are being started
on the beginning and the rest 4 are being postponed until some
running tasks are finished. So, when the one of 6 running tasks
finishes the group starts the 7th task and so on.

Setting parallel limit to 1 means sequential invocation in fact.

The value of 0 means there is no limit and all tasks are run at once.

Remove the ExecuteMode enum, as this is modelled now by the
parallelLimit.

Change-Id: Ice59318be0915401f05bb5a5804078bdc591d09f
Reviewed-by: hjk <hjk@qt.io>

1 files changed, 8 insertions, 3 deletions

diff --git a/tests/manual/tasktree/taskwidget.h b/tests/manual/tasktree/taskwidget.h
index be21ae02e9..7421ca5a30 100644
--- a/tests/manual/tasktree/taskwidget.h
+++ b/tests/manual/tasktree/taskwidget.h
@@ -22,6 +22,11 @@ enum class State {
     Error
 };
 
+enum class ExecuteMode {
+    Sequential, // default
+    Parallel
+};
+
 class StateWidget : public QWidget
 {
 public:
@@ -54,8 +59,8 @@ class GroupWidget : public StateWidget
 public:
     GroupWidget();
 
-    void setExecuteMode(Utils::Tasking::ExecuteMode mode);
-    Utils::Tasking::ExecuteMode executeMode() const;
+    void setExecuteMode(ExecuteMode mode);
+    Utils::Tasking::ParallelLimit executeMode() const;
 
     void setWorkflowPolicy(Utils::Tasking::WorkflowPolicy policy);
     Utils::Tasking::WorkflowPolicy workflowPolicy() const;
@@ -67,7 +72,7 @@ private:
     QComboBox *m_executeCombo = nullptr;
     QComboBox *m_workflowCombo = nullptr;
 
-    Utils::Tasking::ExecuteMode m_executeMode = Utils::Tasking::ExecuteMode::Sequential;
+    ExecuteMode m_executeMode = ExecuteMode::Sequential;
     Utils::Tasking::WorkflowPolicy m_workflowPolicy = Utils::Tasking::WorkflowPolicy::StopOnError;
 };