add button: reset views state, re #11708

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/icons/ViewWidgetsIcons.qrc

@@ -5,5 +5,6 @@
         <file>parallel_projection.png</file>
         <file>pvIcon.png</file>
         <file>pqEditColor24.png</file>
+        <file>resetViewToAll24.png</file>
     </qresource>
 </RCC>

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/inc/MantidVatesSimpleGuiViewWidgets/MdViewerWidget.h

@@ -118,6 +118,9 @@ protected slots:
   void onUnbin();
   /// On switching an MDEvent source to a temporary source.
   void onSwitchSources(std::string rebinnedWorkspaceName, std::string sourceType);
+  /// reset state of all the views
+  void onResetViewsStateToAllData();
+
 protected:
   /// Handle workspace preDeletion tasks.
   void preDeleteHandle(const std::string &wsName,
@@ -162,6 +165,7 @@ private:
   struct AllVSIViewsState {
     AllVSIViewsState();
     ~AllVSIViewsState();
+    void initialize();
 
     vtkSmartPointer<vtkPVXMLElement> stateStandard;
     vtkSmartPointer<vtkPVXMLElement> stateMulti;

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/inc/MantidVatesSimpleGuiViewWidgets/MdViewerWidget.ui

@@ -118,6 +118,39 @@
      <item>
       <widget class="Mantid::Vates::SimpleGui::ColorSelectionWidget" name="colorSelectionWidget" native="true"/>
      </item>
+     <item>
+      <spacer name="horizontalSpacer_bw_color_reset">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeType">
+         <enum>QSizePolicy::Minimum</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>10</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QToolButton" name="resetViewsStateToAllData">
+       <property name="toolTip">
+        <string>Reset the state of all the views (to show all data)</string>
+       </property>
+       <property name="icon">
+        <iconset resource="../../icons/ViewWidgetsIcons.qrc">
+         <normaloff>:/VatesSimpleGuiViewWidgets/icons/resetViewToAll24.png</normaloff>:/VatesSimpleGuiViewWidgets/icons/resetViewToAll24.png</iconset>
+       </property>
+       <property name="iconSize">
+        <size>
+         <width>20</width>
+         <height>20</height>
+        </size>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_5">
        <property name="orientation">
@@ -125,7 +158,7 @@
        </property>
        <property name="sizeHint" stdset="0">
         <size>
-         <width>40</width>
+         <width>20</width>
          <height>20</height>
         </size>
        </property>

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/src/MdViewerWidget.cpp

@@ -133,6 +133,15 @@ namespace
 REGISTER_VATESGUI(MdViewerWidget)
 
 MdViewerWidget::AllVSIViewsState::AllVSIViewsState(){
+  initialize();
+}
+
+/**
+ * Initializes the views states with new empty values. This can be
+ * used to contruct or to re-initialize (forget) the states.
+ */
+void MdViewerWidget::AllVSIViewsState::initialize()
+{
   // these will be assigned from vtkSMProxy::SaveXMLState which
   // allocates a new tree with vtkPVXMLElement::New();
   stateStandard = vtkSmartPointer<vtkPVXMLElement>::New();
@@ -141,7 +150,8 @@ MdViewerWidget::AllVSIViewsState::AllVSIViewsState(){
   stateSplatter = vtkSmartPointer<vtkPVXMLElement>::New();
 }
 
-MdViewerWidget::AllVSIViewsState::~AllVSIViewsState() {
+MdViewerWidget::AllVSIViewsState::~AllVSIViewsState()
+{
 }
 
 /**
@@ -225,7 +235,7 @@ void MdViewerWidget::setupUiAndConnections()
 
 
   // Setup rotation point button
-  QObject::connect(this->ui.resetViewStateToAllData,
+  QObject::connect(this->ui.resetViewsStateToAllData,
                    SIGNAL(released()),
                    this,
                    SLOT(onResetViewToAll()));
@@ -253,7 +263,7 @@ void MdViewerWidget::setupUiAndConnections()
   //this->ui.pipelineBrowser->enableAnnotationFilter(m_widgetName);
   //this->ui.pipelineBrowser->hide();
   g_log.warning("Annotation Name: " + m_widgetName.toStdString());
-  
+
   // Connect the rebinned sources manager
   QObject::connect(&m_rebinnedSourcesManager,
                    SIGNAL(triggerAcceptForNewFilters()),
@@ -406,8 +416,14 @@ void MdViewerWidget::setParaViewComponentsForView()
   QObject::connect(this->currentView, SIGNAL(setViewStatus(ModeControlWidget::Views, bool)),
                    this->ui.modeControlWidget, SLOT(enableViewButton(ModeControlWidget::Views, bool)));
 
+
   this->connectColorSelectionWidget();
 
+  // Connect the reset view state button, which is between the color selection widget and the ParaQ toolbars
+  QObject::connect(this->ui.resetViewsStateToAllData, SIGNAL(released()),
+                   this, SLOT(onResetViewsStateToAllData()));
+
+
   // Set animation (time) control widget <-> view signals/slots.
   QObject::connect(this->currentView,
                    SIGNAL(setAnimationControlState(bool)),
@@ -481,6 +497,33 @@ void MdViewerWidget::onSwitchSources(std::string rebinnedWorkspaceName, std::str
   }
 }
 
+/**
+ * This gives the user a simple way to reset the state and forget all
+ * the interactions to start anew. Resets to all data and resets the
+ * center point and direction/rotation/angle.
+ */
+void MdViewerWidget::onResetViewsStateToAllData()
+{
+  // forget alll the view saved states
+  m_allViews.initialize();
+
+  if (!this->currentView)
+    return;
+
+  // reset direction/rotation
+  pqRenderView* pqv = this->currentView->getView();
+  if (!pqv) {
+    g_log.warning() << "Serious inconsistency found: could not retrieve a pqRenderView while "
+      "trying to reset the state of the views.";
+    return;
+  }
+  pqv->resetViewDirection(0, 0, -1, 0, 0, 0);
+
+  // reset current view
+  this->currentView->resetDisplay(); // includes a resetCamera() or more
+  this->currentView->render();
+}
+
 /**
  * Creates and renders a rebinned workspace source 
  * @param rebinnedWorkspaceName The name of the rebinned workspace.
@@ -1535,7 +1578,7 @@ void MdViewerWidget::saveViewState(ViewBase *view) {
 /**
  * Restores the state of a view (if there's a saved state for this
  * type of view, which should happen if the user has been in that view
- * before and is switching back to it.
+ * before and is switching back to it. @see saveViewState().
  *
  * @param view View where we want to restore the previous state
  * @param vtype Type of view (standard, multislice, etc.)