From e862ba4c88c7a24969b5f93115f21305b3664f48 Mon Sep 17 00:00:00 2001
From: Victor Zarubkin <v.s.zarubkin@gmail.com>
Date: Mon, 1 May 2017 03:52:48 +0300
Subject: [PATCH] (GUI) #35 #33 Added "Use Right Mouse Button..." hint to
 Hierarchy window

---
 profiler_gui/blocks_tree_widget.cpp | 14 +++++++++++++-
 profiler_gui/blocks_tree_widget.h   |  1 +
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/profiler_gui/blocks_tree_widget.cpp b/profiler_gui/blocks_tree_widget.cpp
index a2d79e7..4a35859 100644
--- a/profiler_gui/blocks_tree_widget.cpp
+++ b/profiler_gui/blocks_tree_widget.cpp
@@ -135,6 +135,7 @@ EasyTreeWidget::EasyTreeWidget(QWidget* _parent)
     , m_beginTime(::std::numeric_limits<decltype(m_beginTime)>::max())
     , m_lastFound(nullptr)
     , m_progress(nullptr)
+    , m_hintLabel(nullptr)
     , m_mode(EasyTreeMode_Plain)
     , m_bColorRows(true)
     , m_bLocked(false)
@@ -253,6 +254,10 @@ EasyTreeWidget::EasyTreeWidget(QWidget* _parent)
     m_progress->setValue(100);
     //m_progress->hide();
 
+    m_hintLabel = new QLabel("Use Right Mouse Button on the Diagram to build a hierarchy...\nPress and hold, move, release", this);
+    m_hintLabel->setAlignment(Qt::AlignCenter);
+    m_hintLabel->setStyleSheet("QLabel { color: gray; font: 12pt; }");
+
     QTimer::singleShot(1500, this, &This::alignProgressBar);
 }
 
@@ -260,6 +265,7 @@ EasyTreeWidget::~EasyTreeWidget()
 {
     saveSettings();
     delete m_progress;
+    delete m_hintLabel;
 }
 
 //////////////////////////////////////////////////////////////////////////
@@ -320,6 +326,7 @@ void EasyTreeWidget::setTree(const unsigned int _blocksNumber, const ::profiler:
     if (!_blocksTree.empty())
     {
         m_bLocked = true;
+        m_hintLabel->hide();
         m_progress->setValue(0);
         m_progress->show();
         m_hierarchyBuilder.fillTree(m_beginTime, _blocksNumber, _blocksTree, m_bColorRows, m_mode);
@@ -353,6 +360,7 @@ void EasyTreeWidget::setTreeBlocks(const ::profiler_gui::TreeBlocks& _blocks, ::
     if (!m_inputBlocks.empty())
     {
         m_bLocked = true;
+        m_hintLabel->hide();
         m_progress->setValue(0);
         m_progress->show();
         m_hierarchyBuilder.fillTreeBlocks(m_inputBlocks, _session_begin_time, _left, _right, _strict, m_bColorRows, m_mode);
@@ -396,6 +404,8 @@ void EasyTreeWidget::clearSilent(bool _global)
         //m_progress->hide();
     }
 
+    m_hintLabel->show();
+
     m_bLocked = false;
     m_beginTime = ::std::numeric_limits<decltype(m_beginTime)>::max();
 
@@ -731,8 +741,10 @@ void EasyTreeWidget::moveEvent(QMoveEvent* _event)
 
 void EasyTreeWidget::alignProgressBar()
 {
-    auto pos = mapToGlobal(rect().center());
+    auto center = rect().center();
+    auto pos = mapToGlobal(center);
     m_progress->move(pos.x() - (m_progress->width() >> 1), pos.y() - (m_progress->height() >> 1));
+    m_hintLabel->move(center.x() - (m_hintLabel->width() >> 1), std::max(center.y() - (m_hintLabel->height() >> 1), header()->height()));
 }
 
 //////////////////////////////////////////////////////////////////////////
diff --git a/profiler_gui/blocks_tree_widget.h b/profiler_gui/blocks_tree_widget.h
index 5c17ade..a847269 100644
--- a/profiler_gui/blocks_tree_widget.h
+++ b/profiler_gui/blocks_tree_widget.h
@@ -91,6 +91,7 @@ protected:
     QTreeWidgetItem*             m_lastFound;
     ::profiler::timestamp_t      m_beginTime;
     class QProgressDialog*        m_progress;
+    class QLabel*                m_hintLabel;
     EasyTreeMode                      m_mode;
     bool                        m_bColorRows;
     bool                           m_bLocked;