From ba1b2ec110560bb9cce1abdfb8c27f375aa613ad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A5l=20Hagen?= <pal@applicano.com>
Date: Tue, 1 Sep 2015 11:14:58 +0200
Subject: [PATCH] (#396) Handling scroll wheel event to zoom all well log trace
 plots

---
 .../ProjectDataModel/RimWellLogPlot.cpp       | 30 ++++++++++++++---
 .../ProjectDataModel/RimWellLogPlot.h         |  7 ++--
 .../UserInterface/RiuWellLogPlot.cpp          | 32 ++++++++++++++++++-
 .../UserInterface/RiuWellLogPlot.h            | 10 ++++--
 4 files changed, 69 insertions(+), 10 deletions(-)

diff --git a/ApplicationCode/ProjectDataModel/RimWellLogPlot.cpp b/ApplicationCode/ProjectDataModel/RimWellLogPlot.cpp
index 2fd884197c..9a5604a213 100644
--- a/ApplicationCode/ProjectDataModel/RimWellLogPlot.cpp
+++ b/ApplicationCode/ProjectDataModel/RimWellLogPlot.cpp
@@ -43,8 +43,8 @@ RimWellLogPlot::RimWellLogPlot()
     CAF_PDM_InitField(&showWindow, "ShowWindow", true, "Show well log plot", "", "", "");
     showWindow.uiCapability()->setUiHidden(true);
     
-    CAF_PDM_InitField(&minimumDepth, "MinimumDepth", 0.0, "Set minimum depth", "", "", "");
-    CAF_PDM_InitField(&maximumDepth, "MaximumDepth", 1000.0, "Set maximum depth", "", "", "");
+    CAF_PDM_InitField(&m_minimumDepth, "MinimumDepth", 0.0, "Set minimum depth", "", "", "");
+    CAF_PDM_InitField(&m_maximumDepth, "MaximumDepth", 1000.0, "Set maximum depth", "", "", "");
 
     CAF_PDM_InitFieldNoDefault(&traces, "Traces", "",  "", "", "");
     traces.uiCapability()->setUiHidden(true);
@@ -71,7 +71,7 @@ void RimWellLogPlot::updateViewerWidget()
         bool isViewerCreated = false;
         if (!m_viewer)
         {
-            m_viewer = new RiuWellLogPlot(RiuMainWindow::instance());
+            m_viewer = new RiuWellLogPlot(this, RiuMainWindow::instance());
 
             RiuMainWindow::instance()->addWellLogViewer(m_viewer);
             isViewerCreated = true;
@@ -116,9 +116,9 @@ void RimWellLogPlot::fieldChangedByUi(const caf::PdmFieldHandle* changedField, c
             }
         }
     }
-    else if (changedField == &minimumDepth || changedField == &maximumDepth)
+    else if (changedField == &m_minimumDepth || changedField == &m_maximumDepth)
     {
-        m_viewer->setDepthRange(minimumDepth, maximumDepth);
+        m_viewer->setDepthRange(m_minimumDepth, m_maximumDepth);
     }
 }
 
@@ -154,3 +154,23 @@ RiuWellLogPlot* RimWellLogPlot::viewer()
 {
     return m_viewer;
 }
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void RimWellLogPlot::zoomDepth(double zoomFactor)
+{
+    double center       = (m_maximumDepth + m_minimumDepth)/2;
+    double newHalfDepth = zoomFactor*(m_maximumDepth - m_minimumDepth)/2;
+
+    double newMinimum = center - newHalfDepth;
+    double newMaximum = center + newHalfDepth;
+
+    m_minimumDepth = newMinimum;
+    m_maximumDepth = newMaximum;
+
+    m_minimumDepth.uiCapability()->updateConnectedEditors();
+    m_maximumDepth.uiCapability()->updateConnectedEditors();
+
+    m_viewer->setDepthRange(m_minimumDepth, m_maximumDepth);
+}
diff --git a/ApplicationCode/ProjectDataModel/RimWellLogPlot.h b/ApplicationCode/ProjectDataModel/RimWellLogPlot.h
index eff1cc5bba..c9d52157c8 100644
--- a/ApplicationCode/ProjectDataModel/RimWellLogPlot.h
+++ b/ApplicationCode/ProjectDataModel/RimWellLogPlot.h
@@ -47,6 +47,8 @@ class RimWellLogPlot : public caf::PdmObject
 
     RiuWellLogPlot* viewer();
 
+    void zoomDepth(double zoomFactor);
+
 protected:
 
     // Overridden PDM methods
@@ -54,12 +56,13 @@ class RimWellLogPlot : public caf::PdmObject
 
 private:
     void updateViewerWidget();
+    void setDepthRange(double minimumDepth, double maximumDepth);
 
     virtual caf::PdmFieldHandle* objectToggleField();
 
 private:
     QPointer<RiuWellLogPlot> m_viewer;
     
-    caf::PdmField<double> minimumDepth;
-    caf::PdmField<double> maximumDepth;
+    caf::PdmField<double> m_minimumDepth;
+    caf::PdmField<double> m_maximumDepth;
 };
diff --git a/ApplicationCode/UserInterface/RiuWellLogPlot.cpp b/ApplicationCode/UserInterface/RiuWellLogPlot.cpp
index b3352e7290..1de0094f6c 100644
--- a/ApplicationCode/UserInterface/RiuWellLogPlot.cpp
+++ b/ApplicationCode/UserInterface/RiuWellLogPlot.cpp
@@ -27,13 +27,19 @@
 #include "cvfAssert.h"
 
 #include <QHBoxLayout>
+#include <QWheelEvent>
+
+#define RIU_SCROLLWHEEL_ZOOMFACTOR 1.05
 
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-RiuWellLogPlot::RiuWellLogPlot(QWidget* parent)
+RiuWellLogPlot::RiuWellLogPlot(RimWellLogPlot* dataModelPlot, QWidget* parent)
     : QWidget(parent)
 {
+    Q_ASSERT(dataModelPlot);
+    m_dataModelPlot = dataModelPlot;
+
     m_layout = new QHBoxLayout(this);
     m_layout->setMargin(0);
 
@@ -70,3 +76,27 @@ void RiuWellLogPlot::setDepthRange(double minDepth, double maxDepth)
         m_tracePlots[tpIdx]->setDepthRange(minDepth, maxDepth);
     }
 }
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void RiuWellLogPlot::wheelEvent(QWheelEvent* event)
+{
+     if (!m_dataModelPlot)
+     {
+         QWidget::wheelEvent(event);
+         return;
+     }
+
+     if (event->delta() > 0)
+     {
+         m_dataModelPlot->zoomDepth(RIU_SCROLLWHEEL_ZOOMFACTOR);
+     }
+     else
+     {
+         m_dataModelPlot->zoomDepth(1.0/RIU_SCROLLWHEEL_ZOOMFACTOR);
+     }
+
+     event->accept();
+}
diff --git a/ApplicationCode/UserInterface/RiuWellLogPlot.h b/ApplicationCode/UserInterface/RiuWellLogPlot.h
index 45e85d5f87..567e661760 100644
--- a/ApplicationCode/UserInterface/RiuWellLogPlot.h
+++ b/ApplicationCode/UserInterface/RiuWellLogPlot.h
@@ -24,7 +24,9 @@
 
 class RimWellLogPlot;
 class RiuWellLogTracePlot;
+
 class QHBoxLayout;
+class QWheelEvent;
 
 //==================================================================================================
 //
@@ -36,18 +38,22 @@ class RiuWellLogPlot : public QWidget
     Q_OBJECT
 
 public:
-    RiuWellLogPlot(QWidget* parent = NULL);
+    RiuWellLogPlot(RimWellLogPlot* dataModelPlot, QWidget* parent = NULL);
     virtual ~RiuWellLogPlot();
 
     RiuWellLogTracePlot* createTracePlot();
 
     void setDepthRange(double minDepth, double maxDepth);
 
+protected:
+    void wheelEvent(QWheelEvent* event);
+
 private:
     void setDefults();
 
 private:
-    QHBoxLayout* m_layout;
+    QHBoxLayout*                m_layout;
     QList<RiuWellLogTracePlot*> m_tracePlots;
+    RimWellLogPlot*             m_dataModelPlot;
 };