From 241a217f5852be3f7c0dfcd4e7b48c7e000b3d6d Mon Sep 17 00:00:00 2001
From: Hugo Saint-Vignes <hugo.saint-vignes@numworks.com>
Date: Thu, 4 Jun 2020 17:10:23 +0200
Subject: [PATCH] [apps/graph] Add fast scroll for regression and sequence
 graph views

Change-Id: I6b36e929234ec5dc161b0eefb20eb84aa360fe3b
---
 apps/regression/graph_controller.cpp     | 6 +++++-
 apps/sequence/graph/graph_controller.cpp | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 1bb6d9625..eceb6906a 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -235,7 +235,11 @@ bool GraphController::moveCursorHorizontally(int direction, bool fast) {
     }
     *m_selectedDotIndex = dotSelected;
   } else {
-    x = m_cursor->x() + direction * m_store->xGridUnit()/k_numberOfCursorStepsInGradUnit;
+    double step = direction * m_store->xGridUnit()/k_numberOfCursorStepsInGradUnit;
+    if (fast) {
+      step *= 5.0;
+    }
+    x = m_cursor->x() + step;
     y = yValue(*m_selectedSeriesIndex, x, globalContext());
   }
   m_cursor->moveTo(x, x, y);
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index d35077101..cad4979f8 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -85,7 +85,7 @@ bool GraphController::moveCursorHorizontally(int direction, bool fast) {
     return false;
   }
   // The cursor moves by step that is larger than 1 and than a pixel's width.
-  const int step = std::ceil(m_view.pixelWidth());
+  const int step = std::ceil(m_view.pixelWidth()) * (fast ? 5 : 1);
   double x = direction > 0 ? xCursorPosition + step:
     xCursorPosition -  step;
   if (x < 0.0) {