From 4ecdc6b3202d4ee7d739a1e51cedfb11be63091b Mon Sep 17 00:00:00 2001
From: Alexander Bruy <alexander.bruy@gmail.com>
Date: Mon, 24 Mar 2014 15:00:34 +0200
Subject: [PATCH] use Shift modifier for bigger step when changing
 brightness/contrast (fix #8177)

---
 src/app/qgisapp.cpp | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index cea574c6d47a..3ccfcf7a0308 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -7010,25 +7010,44 @@ void QgisApp::histogramStretch( bool visibleAreaOnly, QgsRaster::ContrastEnhance
 
 void QgisApp::increaseBrightness()
 {
-  adjustBrightnessContrast( 1 );
+  int step = 1;
+  if ( QgsApplication::keyboardModifiers() == Qt::ShiftModifier )
+  {
+    step = 10;
+  }
+  adjustBrightnessContrast( step );
 }
 
 void QgisApp::decreaseBrightness()
 {
-  adjustBrightnessContrast( -1 );
+  int step = -1;
+  if ( QgsApplication::keyboardModifiers() == Qt::ShiftModifier )
+  {
+    step = -10;
+  }
+  adjustBrightnessContrast( step );
 }
 
 void QgisApp::increaseContrast()
 {
-  adjustBrightnessContrast( 1, false );
+  int step = 1;
+  if ( QgsApplication::keyboardModifiers() == Qt::ShiftModifier )
+  {
+    step = 10;
+  }
+  adjustBrightnessContrast( step, false );
 }
 
 void QgisApp::decreaseContrast()
 {
-  adjustBrightnessContrast( -1, false );
+  int step = -1;
+  if ( QgsApplication::keyboardModifiers() == Qt::ShiftModifier )
+  {
+    step = -10;
+  }
+  adjustBrightnessContrast( step, false );
 }
 
-
 void QgisApp::adjustBrightnessContrast( int delta, bool updateBrightness )
 {
   QgsMapLayer * myLayer = mMapLegend->currentLayer();