Implement user viewports.

ADDED popup to Appearances palette where users can define viewports
for later selection.

Fixes https://gitlab.com/kicad/code/kicad/issues/2271

common/dialogs/eda_view_switcher.cpp

@@ -33,10 +33,12 @@
 #endif
 
 
-EDA_VIEW_SWITCHER::EDA_VIEW_SWITCHER( wxWindow* aParent, const wxArrayString& aItems ) :
+EDA_VIEW_SWITCHER::EDA_VIEW_SWITCHER( wxWindow* aParent, const wxArrayString& aItems,
+                                      wxKeyCode aCtrlKey ) :
         EDA_VIEW_SWITCHER_BASE( aParent ),
         m_tabState( true ),
-        m_receivingEvents( false )
+        m_receivingEvents( false ),
+        m_ctrlKey( aCtrlKey )
 {
     m_listBox->InsertItems( aItems, 0 );
     m_listBox->SetSelection( std::min( 1, (int) m_listBox->GetCount() - 1 ) );
@@ -129,7 +131,7 @@ bool EDA_VIEW_SWITCHER::TryBefore( wxEvent& aEvent )
     }
 
     // Check for control key trailing edge
-    if( !wxGetKeyState( WXK_RAW_CONTROL ) )
+    if( !wxGetKeyState( m_ctrlKey ) )
     {
         wxPostEvent( this, wxCommandEvent( wxEVT_COMMAND_BUTTON_CLICKED, wxID_OK ) );
     }

common/project/board_project_settings.cpp

@@ -128,3 +128,66 @@ void PARAM_LAYER_PRESET::jsonToPresets( const nlohmann::json& aJson )
         }
     }
 }
+
+
+PARAM_VIEWPORT::PARAM_VIEWPORT( const std::string& aPath, std::vector<VIEWPORT>* aViewportList ) :
+        PARAM_LAMBDA<nlohmann::json>( aPath,
+                                      std::bind( &PARAM_VIEWPORT::viewportsToJson, this ),
+                                      std::bind( &PARAM_VIEWPORT::jsonToViewports, this, _1 ),
+                                      {} ),
+        m_viewports( aViewportList )
+{
+    wxASSERT( aViewportList );
+}
+
+
+nlohmann::json PARAM_VIEWPORT::viewportsToJson()
+{
+    nlohmann::json ret = nlohmann::json::array();
+
+    for( const VIEWPORT& viewport : *m_viewports )
+    {
+        nlohmann::json js = {
+                { "name", viewport.name },
+                { "x", viewport.rect.GetX() },
+                { "y", viewport.rect.GetY() },
+                { "w", viewport.rect.GetWidth() },
+                { "h", viewport.rect.GetHeight() }
+        };
+
+        ret.push_back( js );
+    }
+
+    return ret;
+}
+
+
+void PARAM_VIEWPORT::jsonToViewports( const nlohmann::json& aJson )
+{
+    if( aJson.empty() || !aJson.is_array() )
+        return;
+
+    m_viewports->clear();
+
+    for( const nlohmann::json& viewport : aJson )
+    {
+        if( viewport.contains( "name" ) )
+        {
+            VIEWPORT v( viewport.at( "name" ).get<wxString>() );
+
+            if( viewport.contains( "x" ) )
+                v.rect.SetX( viewport.at( "x" ).get<double>() );
+
+            if( viewport.contains( "y" ) )
+                v.rect.SetY( viewport.at( "y" ).get<double>() );
+
+            if( viewport.contains( "w" ) )
+                v.rect.SetWidth( viewport.at( "w" ).get<double>() );
+
+            if( viewport.contains( "h" ) )
+                v.rect.SetHeight( viewport.at( "h" ).get<double>() );
+
+            m_viewports->emplace_back( v );
+        }
+    }
+}

common/project/project_file.cpp

@@ -109,6 +109,8 @@ PROJECT_FILE::PROJECT_FILE( const wxString& aFullPath ) :
     m_NetSettings = std::make_shared<NET_SETTINGS>( this, "net_settings" );
 
     m_params.emplace_back( new PARAM_LAYER_PRESET( "board.layer_presets", &m_LayerPresets ) );
+
+    m_params.emplace_back( new PARAM_VIEWPORT( "board.viewports", &m_Viewports ) );
 }
 
 

include/dialogs/eda_view_switcher.h

@@ -29,7 +29,7 @@
 class EDA_VIEW_SWITCHER : public EDA_VIEW_SWITCHER_BASE
 {
 public:
-    EDA_VIEW_SWITCHER( wxWindow* aParent, const wxArrayString& aItems );
+    EDA_VIEW_SWITCHER( wxWindow* aParent, const wxArrayString& aItems, wxKeyCode aCtrlKey );
 
     int GetSelection() const { return m_listBox->GetSelection(); }
 
@@ -40,6 +40,7 @@ protected:
 protected:
     bool      m_tabState;
     bool      m_receivingEvents;
+    wxKeyCode m_ctrlKey;
 };
 
 #endif    // EDA_VIEW_SWITCHER_H

include/project/board_project_settings.h

@@ -26,6 +26,7 @@
 
 // Can be removed by refactoring PARAM_LAYER_PRESET
 #include <nlohmann/json.hpp>
+#include <math/box2.h>
 
 /**
  * This file contains data structures that are saved in the project file or project local settings
@@ -181,4 +182,34 @@ private:
     std::vector<LAYER_PRESET>* m_presets;
 };
 
+
+struct VIEWPORT
+{
+    VIEWPORT( const wxString& aName = wxEmptyString ) :
+            name( aName )
+    { }
+
+    VIEWPORT( const wxString& aName, const BOX2D& aRect ) :
+            name( aName ),
+            rect( aRect )
+    { }
+
+    wxString name;
+    BOX2D    rect;
+};
+
+
+class PARAM_VIEWPORT : public PARAM_LAMBDA<nlohmann::json>
+{
+public:
+    PARAM_VIEWPORT( const std::string& aPath, std::vector<VIEWPORT>* aViewportList );
+
+private:
+    nlohmann::json viewportsToJson();
+
+    void jsonToViewports( const nlohmann::json& aJson );
+
+    std::vector<VIEWPORT>* m_viewports;
+};
+
 #endif // KICAD_BOARD_PROJECT_SETTINGS_H

include/project/project_file.h

@@ -167,8 +167,9 @@ public:
      */
     std::shared_ptr<NET_SETTINGS> m_NetSettings;
 
-    /// List of stored layer presets
+
-    std::vector<LAYER_PRESET> m_LayerPresets;
+    std::vector<LAYER_PRESET>     m_LayerPresets;   /// List of stored layer presets
+    std::vector<VIEWPORT>         m_Viewports;      /// List of stored viewports (pos + zoom)
 
 private:
     /// An list of schematic sheets in this project

pcbnew/pcb_base_edit_frame.cpp

@@ -94,18 +94,19 @@ void PCB_BASE_EDIT_FRAME::doCloseWindow()
 
 bool PCB_BASE_EDIT_FRAME::TryBefore( wxEvent& aEvent )
 {
-    static bool s_switcherShown = false;
+    static bool s_presetSwitcherShown = false;
+    static bool s_viewportSwitcherShown = false;
 
-    if( !s_switcherShown && wxGetKeyState( WXK_RAW_CONTROL ) && wxGetKeyState( WXK_TAB ) )
+    if( !s_presetSwitcherShown && wxGetKeyState( WXK_RAW_CONTROL ) && wxGetKeyState( WXK_TAB ) )
     {
         if( m_appearancePanel && this->IsActive() )
         {
             const wxArrayString& mru = m_appearancePanel->GetLayerPresetsMRU();
-            EDA_VIEW_SWITCHER    switcher( this, mru );
+            EDA_VIEW_SWITCHER    switcher( this, mru, WXK_RAW_CONTROL );
 
-            s_switcherShown = true;
+            s_presetSwitcherShown = true;
             switcher.ShowModal();
-            s_switcherShown = false;
+            s_presetSwitcherShown = false;
 
             int idx = switcher.GetSelection();
 
@@ -115,6 +116,25 @@ bool PCB_BASE_EDIT_FRAME::TryBefore( wxEvent& aEvent )
             return true;
         }
     }
+    else if( !s_viewportSwitcherShown && wxGetKeyState( WXK_ALT ) && wxGetKeyState( WXK_TAB ) )
+    {
+        if( m_appearancePanel && this->IsActive() )
+        {
+            const wxArrayString& mru = m_appearancePanel->GetViewportsMRU();
+            EDA_VIEW_SWITCHER    switcher( this, mru, WXK_ALT );
+
+            s_viewportSwitcherShown = true;
+            switcher.ShowModal();
+            s_viewportSwitcherShown = false;
+
+            int idx = switcher.GetSelection();
+
+            if( idx >= 0 && idx < (int) mru.size() )
+                m_appearancePanel->ApplyViewport( mru[idx] );
+
+            return true;
+        }
+    }
 
     return PCB_BASE_FRAME::TryBefore( aEvent );
 }

pcbnew/pcbnew_config.cpp

@@ -94,6 +94,7 @@ bool PCB_EDIT_FRAME::LoadProjectSettings()
         netclassColors[pair.first] = pair.second->GetPcbColor();
 
     m_appearancePanel->SetUserLayerPresets( project.m_LayerPresets );
+    m_appearancePanel->SetUserViewports( project.m_Viewports );
 
     PCB_SELECTION_TOOL*       selTool = GetToolManager()->GetTool<PCB_SELECTION_TOOL>();
     SELECTION_FILTER_OPTIONS& filterOpts = selTool->GetFilter();
@@ -145,6 +146,7 @@ void PCB_EDIT_FRAME::SaveProjectSettings()
     project.m_BoardDrawingSheetFile = BASE_SCREEN::m_DrawingSheetFileName;
 
     project.m_LayerPresets = m_appearancePanel->GetUserLayerPresets();
+    project.m_Viewports = m_appearancePanel->GetUserViewports();
 
     RecordDRCExclusions();
 

pcbnew/widgets/appearance_controls.cpp

@@ -432,6 +432,7 @@ APPEARANCE_CONTROLS::APPEARANCE_CONTROLS( PCB_BASE_FRAME* aParent, wxWindow* aFo
     m_windowLayers->SetFont( infoFont );
     m_windowObjects->SetFont( infoFont );
     m_presetsLabel->SetFont( infoFont );
+    m_viewportsLabel->SetFont( infoFont );
 
     createControls();
 
@@ -983,6 +984,7 @@ void APPEARANCE_CONTROLS::OnBoardChanged()
     rebuildNets();
     rebuildLayerPresetsWidget();
     syncLayerPresetSelection();
+    rebuildViewportsWidget();
 
     UpdateDisplayOptions();
 
@@ -1394,6 +1396,51 @@ void APPEARANCE_CONTROLS::ApplyLayerPreset( const LAYER_PRESET& aPreset )
 }
 
 
+std::vector<VIEWPORT> APPEARANCE_CONTROLS::GetUserViewports() const
+{
+    std::vector<VIEWPORT> ret;
+
+    for( const std::pair<const wxString, VIEWPORT>& pair : m_viewports )
+        ret.emplace_back( pair.second );
+
+    return ret;
+}
+
+
+void APPEARANCE_CONTROLS::SetUserViewports( std::vector<VIEWPORT>& aViewportList )
+{
+    m_viewports.clear();
+
+    for( const VIEWPORT& viewport : aViewportList )
+    {
+        if( m_viewports.count( viewport.name ) )
+            continue;
+
+        m_viewports[viewport.name] = viewport;
+
+        m_viewportMRU.Add( viewport.name );
+    }
+
+    rebuildViewportsWidget();
+}
+
+
+void APPEARANCE_CONTROLS::ApplyViewport( const wxString& aViewportName )
+{
+    updateViewportSelection( aViewportName );
+
+    wxCommandEvent dummy;
+    onViewportChanged( dummy );
+}
+
+
+void APPEARANCE_CONTROLS::ApplyViewport( const VIEWPORT& aViewport )
+{
+    updateViewportSelection( aViewport.name );
+    doApplyViewport( aViewport );
+}
+
+
 void APPEARANCE_CONTROLS::rebuildLayers()
 {
     BOARD* board = m_frame->GetBoard();
@@ -2343,7 +2390,7 @@ void APPEARANCE_CONTROLS::rebuildLayerPresetsWidget()
 
     m_cbLayerPresets->SetSelection( 0 );
 
-    // At least the build in presets should always be present
+    // At least the built-in presets should always be present
     wxASSERT( !m_layerPresets.empty() );
 
     // Default preset: all layers
@@ -2541,6 +2588,144 @@ void APPEARANCE_CONTROLS::doApplyLayerPreset( const LAYER_PRESET& aPreset )
 }
 
 
+void APPEARANCE_CONTROLS::rebuildViewportsWidget()
+{
+    m_cbViewports->Clear();
+
+    for( std::pair<const wxString, VIEWPORT>& pair : m_viewports )
+        m_cbViewports->Append( pair.first, static_cast<void*>( &pair.second ) );
+
+    m_cbViewports->Append( wxT( "-----" ) );
+    m_cbViewports->Append( _( "Save viewport..." ) );
+    m_cbViewports->Append( _( "Delete viewport..." ) );
+
+    m_cbViewports->SetSelection( m_cbViewports->GetCount() - 3 );
+    m_lastSelectedViewport = nullptr;
+}
+
+
+void APPEARANCE_CONTROLS::updateViewportSelection( const wxString& aName )
+{
+    int idx = m_cbViewports->FindString( aName );
+
+    if( idx >= 0 && m_cbViewports->GetSelection() != idx )
+    {
+        m_cbViewports->SetSelection( idx );
+        m_lastSelectedViewport = static_cast<VIEWPORT*>( m_cbViewports->GetClientData( idx ) );
+    }
+    else if( idx < 0 )
+    {
+        m_cbViewports->SetSelection( m_cbViewports->GetCount() - 3 ); // separator
+        m_lastSelectedViewport = nullptr;
+    }
+}
+
+
+void APPEARANCE_CONTROLS::onViewportChanged( wxCommandEvent& aEvent )
+{
+    int count = m_cbViewports->GetCount();
+    int index = m_cbViewports->GetSelection();
+
+    if( index >= 0 && index < count - 3 )
+    {
+        VIEWPORT* viewport = static_cast<VIEWPORT*>( m_cbViewports->GetClientData( index ) );
+
+        if( viewport )
+            doApplyViewport( *viewport );
+
+        if( !viewport->name.IsEmpty() )
+        {
+            m_viewportMRU.Remove( viewport->name );
+            m_viewportMRU.Insert( viewport->name, 0 );
+        }
+    }
+    else if( index == count - 2 )
+    {
+        // Save current state to new preset
+        wxString name;
+
+        wxTextEntryDialog dlg( this, _( "Viewport name:" ), _( "Save Viewport" ), name );
+
+        if( dlg.ShowModal() != wxID_OK )
+        {
+            if( m_lastSelectedViewport )
+                m_cbViewports->SetStringSelection( m_lastSelectedViewport->name );
+            else
+                m_cbViewports->SetSelection( m_cbViewports->GetCount() - 3 );
+
+            return;
+        }
+
+        name = dlg.GetValue();
+        bool exists = m_viewports.count( name );
+
+        if( !exists )
+        {
+            m_viewports[name] = VIEWPORT( name, m_frame->GetCanvas()->GetView()->GetViewport() );
+
+            index = m_cbViewports->Insert( name, index-1, static_cast<void*>( &m_viewports[name] ) );
+        }
+        else
+        {
+            index = m_cbViewports->FindString( name );
+            m_viewportMRU.Remove( name );
+        }
+
+        m_cbViewports->SetSelection( index );
+        m_viewportMRU.Insert( name, 0 );
+
+        return;
+    }
+    else if( index == count - 1 )
+    {
+        // Delete an existing preset
+        wxArrayString headers;
+        std::vector<wxArrayString> items;
+
+        headers.Add( _( "Viewports" ) );
+
+        for( std::pair<const wxString, VIEWPORT>& pair : m_viewports )
+        {
+            wxArrayString item;
+            item.Add( pair.first );
+            items.emplace_back( item );
+        }
+
+        EDA_LIST_DIALOG dlg( m_frame, _( "Delete Viewport" ), headers, items );
+        dlg.SetListLabel( _( "Select viewport:" ) );
+
+        if( dlg.ShowModal() == wxID_OK )
+        {
+            wxString viewportName = dlg.GetTextSelection();
+            int idx = m_cbViewports->FindString( viewportName );
+
+            if( idx != wxNOT_FOUND )
+            {
+                m_layerPresets.erase( viewportName );
+                m_cbViewports->Delete( idx );
+                m_viewportMRU.Remove( viewportName );
+            }
+        }
+
+        if( m_lastSelectedViewport )
+            m_cbViewports->SetStringSelection( m_lastSelectedViewport->name );
+        else
+            m_cbViewports->SetSelection( m_cbViewports->GetCount() - 3 );
+
+        return;
+    }
+
+    passOnFocus();
+}
+
+
+void APPEARANCE_CONTROLS::doApplyViewport( const VIEWPORT& aViewport )
+{
+    m_frame->GetCanvas()->GetView()->SetViewport( aViewport.rect );
+    m_frame->GetCanvas()->Refresh();
+}
+
+
 void APPEARANCE_CONTROLS::OnColorSwatchChanged( wxCommandEvent& aEvent )
 {
     COLOR_SWATCH* swatch   = static_cast<COLOR_SWATCH*>( aEvent.GetEventObject() );

pcbnew/widgets/appearance_controls.h

@@ -260,6 +260,21 @@ public:
         return m_presetMRU;
     }
 
+    ///< Return a list of viewports created by the user.
+    std::vector<VIEWPORT> GetUserViewports() const;
+
+    ///< Update the current viewports from those saved in the project file.
+    void SetUserViewports( std::vector<VIEWPORT>& aPresetList );
+
+    void ApplyViewport( const wxString& aPresetName );
+
+    void ApplyViewport( const VIEWPORT& aPreset );
+
+    const wxArrayString& GetViewportsMRU()
+    {
+        return m_viewportMRU;
+    }
+
     void OnColorSwatchChanged( wxCommandEvent& aEvent );
 
     void OnLayerContextMenu( wxCommandEvent& aEvent );
@@ -311,6 +326,8 @@ private:
 
     void syncLayerPresetSelection();
 
+    void rebuildViewportsWidget();
+
     void onLayerLeftClick( wxMouseEvent& aEvent );
 
     void rightClickHandler( wxMouseEvent& aEvent );
@@ -335,6 +352,12 @@ private:
 
     void doApplyLayerPreset( const LAYER_PRESET& aPreset );
 
+    void updateViewportSelection( const wxString& aName );
+
+    void onViewportChanged( wxCommandEvent& aEvent ) override;
+
+    void doApplyViewport( const VIEWPORT& aViewport );
+
     void onNetclassVisibilityChanged( wxCommandEvent& aEvent );
 
     void showNetclass( const wxString& aClassName, bool aShow = true );
@@ -397,16 +420,15 @@ private:
 
     // TODO(JE) Move preset storage to the PCB_CONTROL tool
 
-    // Storage for all layer presets
     std::map<wxString, LAYER_PRESET> m_layerPresets;
-
     LAYER_PRESET*                    m_currentPreset;
-
-    /// The last user (non-read-only) preset selected by the user
     LAYER_PRESET*                    m_lastSelectedUserPreset;
-
     wxArrayString                    m_presetMRU;
 
+    std::map<wxString, VIEWPORT>     m_viewports;
+    VIEWPORT*                        m_lastSelectedViewport;
+    wxArrayString                    m_viewportMRU;
+
     wxMenu* m_layerContextMenu;
 
     /// Stores wxIDs for each netclass for control event mapping

pcbnew/widgets/appearance_controls_base.cpp

@@ -171,7 +171,28 @@ APPEARANCE_CONTROLS_BASE::APPEARANCE_CONTROLS_BASE( wxWindow* parent, wxWindowID
 	bPresets->Add( m_cbLayerPresets, 0, wxALL|wxEXPAND, 2 );
 
 
-	bBottomMargin->Add( bPresets, 0, wxEXPAND|wxBOTTOM|wxRIGHT|wxLEFT, 5 );
+	bBottomMargin->Add( bPresets, 0, wxEXPAND|wxRIGHT|wxLEFT, 5 );
+
+
+	bBottomMargin->Add( 0, 2, 0, wxEXPAND, 5 );
+
+	wxBoxSizer* bViewports;
+	bViewports = new wxBoxSizer( wxVERTICAL );
+
+	m_viewportsLabel = new wxStaticText( this, wxID_ANY, _("Viewports (Alt+Tab):"), wxDefaultPosition, wxDefaultSize, 0 );
+	m_viewportsLabel->Wrap( -1 );
+	bViewports->Add( m_viewportsLabel, 1, wxRIGHT|wxLEFT, 2 );
+
+	wxString m_cbViewportsChoices[] = { _("(unsaved)") };
+	int m_cbViewportsNChoices = sizeof( m_cbViewportsChoices ) / sizeof( wxString );
+	m_cbViewports = new wxChoice( this, wxID_ANY, wxDefaultPosition, wxDefaultSize, m_cbViewportsNChoices, m_cbViewportsChoices, 0 );
+	m_cbViewports->SetSelection( 1 );
+	m_cbViewports->SetToolTip( _("Layer presets") );
+
+	bViewports->Add( m_cbViewports, 0, wxALL|wxEXPAND, 2 );
+
+
+	bBottomMargin->Add( bViewports, 1, wxEXPAND|wxBOTTOM|wxRIGHT|wxLEFT, 5 );
 
 
 	m_sizerOuter->Add( bBottomMargin, 0, wxBOTTOM|wxEXPAND, 2 );
@@ -195,6 +216,7 @@ APPEARANCE_CONTROLS_BASE::APPEARANCE_CONTROLS_BASE( wxWindow* parent, wxWindowID
 	m_netsGrid->Connect( wxEVT_SET_FOCUS, wxFocusEventHandler( APPEARANCE_CONTROLS_BASE::OnSetFocus ), NULL, this );
 	m_panelNetclasses->Connect( wxEVT_SET_FOCUS, wxFocusEventHandler( APPEARANCE_CONTROLS_BASE::OnSetFocus ), NULL, this );
 	m_cbLayerPresets->Connect( wxEVT_COMMAND_CHOICE_SELECTED, wxCommandEventHandler( APPEARANCE_CONTROLS_BASE::onLayerPresetChanged ), NULL, this );
+	m_cbViewports->Connect( wxEVT_COMMAND_CHOICE_SELECTED, wxCommandEventHandler( APPEARANCE_CONTROLS_BASE::onViewportChanged ), NULL, this );
 }
 
 APPEARANCE_CONTROLS_BASE::~APPEARANCE_CONTROLS_BASE()
@@ -214,5 +236,6 @@ APPEARANCE_CONTROLS_BASE::~APPEARANCE_CONTROLS_BASE()
 	m_netsGrid->Disconnect( wxEVT_SET_FOCUS, wxFocusEventHandler( APPEARANCE_CONTROLS_BASE::OnSetFocus ), NULL, this );
 	m_panelNetclasses->Disconnect( wxEVT_SET_FOCUS, wxFocusEventHandler( APPEARANCE_CONTROLS_BASE::OnSetFocus ), NULL, this );
 	m_cbLayerPresets->Disconnect( wxEVT_COMMAND_CHOICE_SELECTED, wxCommandEventHandler( APPEARANCE_CONTROLS_BASE::onLayerPresetChanged ), NULL, this );
+	m_cbViewports->Disconnect( wxEVT_COMMAND_CHOICE_SELECTED, wxCommandEventHandler( APPEARANCE_CONTROLS_BASE::onViewportChanged ), NULL, this );
 
 }

pcbnew/widgets/appearance_controls_base.fbp

@@ -1118,7 +1118,7 @@
                         <property name="permission">none</property>
                         <object class="sizeritem" expanded="1">
                             <property name="border">5</property>
-                            <property name="flag">wxEXPAND|wxBOTTOM|wxRIGHT|wxLEFT</property>
+                            <property name="flag">wxEXPAND|wxRIGHT|wxLEFT</property>
                             <property name="proportion">0</property>
                             <object class="wxBoxSizer" expanded="1">
                                 <property name="minimum_size"></property>
@@ -1253,6 +1253,153 @@
                                 </object>
                             </object>
                         </object>
+                        <object class="sizeritem" expanded="1">
+                            <property name="border">5</property>
+                            <property name="flag">wxEXPAND</property>
+                            <property name="proportion">0</property>
+                            <object class="spacer" expanded="1">
+                                <property name="height">2</property>
+                                <property name="permission">protected</property>
+                                <property name="width">0</property>
+                            </object>
+                        </object>
+                        <object class="sizeritem" expanded="1">
+                            <property name="border">5</property>
+                            <property name="flag">wxEXPAND|wxBOTTOM|wxRIGHT|wxLEFT</property>
+                            <property name="proportion">1</property>
+                            <object class="wxBoxSizer" expanded="1">
+                                <property name="minimum_size"></property>
+                                <property name="name">bViewports</property>
+                                <property name="orient">wxVERTICAL</property>
+                                <property name="permission">none</property>
+                                <object class="sizeritem" expanded="1">
+                                    <property name="border">2</property>
+                                    <property name="flag">wxRIGHT|wxLEFT</property>
+                                    <property name="proportion">1</property>
+                                    <object class="wxStaticText" expanded="1">
+                                        <property name="BottomDockable">1</property>
+                                        <property name="LeftDockable">1</property>
+                                        <property name="RightDockable">1</property>
+                                        <property name="TopDockable">1</property>
+                                        <property name="aui_layer"></property>
+                                        <property name="aui_name"></property>
+                                        <property name="aui_position"></property>
+                                        <property name="aui_row"></property>
+                                        <property name="best_size"></property>
+                                        <property name="bg"></property>
+                                        <property name="caption"></property>
+                                        <property name="caption_visible">1</property>
+                                        <property name="center_pane">0</property>
+                                        <property name="close_button">1</property>
+                                        <property name="context_help"></property>
+                                        <property name="context_menu">1</property>
+                                        <property name="default_pane">0</property>
+                                        <property name="dock">Dock</property>
+                                        <property name="dock_fixed">0</property>
+                                        <property name="docking">Left</property>
+                                        <property name="enabled">1</property>
+                                        <property name="fg"></property>
+                                        <property name="floatable">1</property>
+                                        <property name="font"></property>
+                                        <property name="gripper">0</property>
+                                        <property name="hidden">0</property>
+                                        <property name="id">wxID_ANY</property>
+                                        <property name="label">Viewports (Alt+Tab):</property>
+                                        <property name="markup">0</property>
+                                        <property name="max_size"></property>
+                                        <property name="maximize_button">0</property>
+                                        <property name="maximum_size"></property>
+                                        <property name="min_size"></property>
+                                        <property name="minimize_button">0</property>
+                                        <property name="minimum_size"></property>
+                                        <property name="moveable">1</property>
+                                        <property name="name">m_viewportsLabel</property>
+                                        <property name="pane_border">1</property>
+                                        <property name="pane_position"></property>
+                                        <property name="pane_size"></property>
+                                        <property name="permission">protected</property>
+                                        <property name="pin_button">1</property>
+                                        <property name="pos"></property>
+                                        <property name="resize">Resizable</property>
+                                        <property name="show">1</property>
+                                        <property name="size"></property>
+                                        <property name="style"></property>
+                                        <property name="subclass">; ; forward_declare</property>
+                                        <property name="toolbar_pane">0</property>
+                                        <property name="tooltip"></property>
+                                        <property name="window_extra_style"></property>
+                                        <property name="window_name"></property>
+                                        <property name="window_style"></property>
+                                        <property name="wrap">-1</property>
+                                    </object>
+                                </object>
+                                <object class="sizeritem" expanded="1">
+                                    <property name="border">2</property>
+                                    <property name="flag">wxALL|wxEXPAND</property>
+                                    <property name="proportion">0</property>
+                                    <object class="wxChoice" expanded="1">
+                                        <property name="BottomDockable">1</property>
+                                        <property name="LeftDockable">1</property>
+                                        <property name="RightDockable">1</property>
+                                        <property name="TopDockable">1</property>
+                                        <property name="aui_layer"></property>
+                                        <property name="aui_name"></property>
+                                        <property name="aui_position"></property>
+                                        <property name="aui_row"></property>
+                                        <property name="best_size"></property>
+                                        <property name="bg"></property>
+                                        <property name="caption"></property>
+                                        <property name="caption_visible">1</property>
+                                        <property name="center_pane">0</property>
+                                        <property name="choices">&quot;(unsaved)&quot;</property>
+                                        <property name="close_button">1</property>
+                                        <property name="context_help"></property>
+                                        <property name="context_menu">1</property>
+                                        <property name="default_pane">0</property>
+                                        <property name="dock">Dock</property>
+                                        <property name="dock_fixed">0</property>
+                                        <property name="docking">Left</property>
+                                        <property name="enabled">1</property>
+                                        <property name="fg"></property>
+                                        <property name="floatable">1</property>
+                                        <property name="font"></property>
+                                        <property name="gripper">0</property>
+                                        <property name="hidden">0</property>
+                                        <property name="id">wxID_ANY</property>
+                                        <property name="max_size"></property>
+                                        <property name="maximize_button">0</property>
+                                        <property name="maximum_size"></property>
+                                        <property name="min_size"></property>
+                                        <property name="minimize_button">0</property>
+                                        <property name="minimum_size"></property>
+                                        <property name="moveable">1</property>
+                                        <property name="name">m_cbViewports</property>
+                                        <property name="pane_border">1</property>
+                                        <property name="pane_position"></property>
+                                        <property name="pane_size"></property>
+                                        <property name="permission">protected</property>
+                                        <property name="pin_button">1</property>
+                                        <property name="pos"></property>
+                                        <property name="resize">Resizable</property>
+                                        <property name="selection">1</property>
+                                        <property name="show">1</property>
+                                        <property name="size"></property>
+                                        <property name="style"></property>
+                                        <property name="subclass">; ; forward_declare</property>
+                                        <property name="toolbar_pane">0</property>
+                                        <property name="tooltip">Layer presets</property>
+                                        <property name="validator_data_type"></property>
+                                        <property name="validator_style">wxFILTER_NONE</property>
+                                        <property name="validator_type">wxDefaultValidator</property>
+                                        <property name="validator_variable"></property>
+                                        <property name="window_extra_style"></property>
+                                        <property name="window_name"></property>
+                                        <property name="window_style"></property>
+                                        <event name="OnChoice">onViewportChanged</event>
+                                    </object>
+                                </object>
+                            </object>
+                        </object>
                     </object>
                 </object>
             </object>

pcbnew/widgets/appearance_controls_base.h

@@ -66,6 +66,8 @@ class APPEARANCE_CONTROLS_BASE : public WX_PANEL
 		wxBoxSizer* m_netclassOuterSizer;
 		wxStaticText* m_presetsLabel;
 		wxChoice* m_cbLayerPresets;
+		wxStaticText* m_viewportsLabel;
+		wxChoice* m_cbViewports;
 
 		// Virtual event handlers, overide them in your derived class
 		virtual void OnSetFocus( wxFocusEvent& event ) { event.Skip(); }
@@ -75,6 +77,7 @@ class APPEARANCE_CONTROLS_BASE : public WX_PANEL
 		virtual void OnNetGridDoubleClick( wxGridEvent& event ) { event.Skip(); }
 		virtual void OnNetGridRightClick( wxGridEvent& event ) { event.Skip(); }
 		virtual void onLayerPresetChanged( wxCommandEvent& event ) { event.Skip(); }
+		virtual void onViewportChanged( wxCommandEvent& event ) { event.Skip(); }
 
 
 	public: