Add backspace hot key to Eeschema to leave current sheet.

eeschema/hotkeys.cpp

@@ -117,7 +117,8 @@ static EDA_HOTKEY HkZoomOut( _HKI( "Zoom Out" ), HK_ZOOM_OUT, GR_KB_CTRL + '-',
 
 static EDA_HOTKEY HkHelp( _HKI( "Help (this window)" ), HK_HELP, '?' );
 static EDA_HOTKEY HkResetLocalCoord( _HKI( "Reset Local Coordinates" ), HK_RESET_LOCAL_COORD, ' ' );
-
+static EDA_HOTKEY HkLeaveSheet( _HKI( "Leave Sheet" ), HK_LEAVE_SHEET, WXK_BACK,
+                                ID_POPUP_SCH_LEAVE_SHEET );
 
 // Undo
 static EDA_HOTKEY HkUndo( _HKI( "Undo" ), HK_UNDO, GR_KB_CTRL + 'Z', (int) wxID_UNDO );
@@ -288,6 +289,7 @@ static EDA_HOTKEY* schematic_Hotkey_List[] =
     &HkAddBusEntry,
     &HkAddGraphicPolyLine,
     &HkAddGraphicText,
+    &HkLeaveSheet,
     NULL
 };
 
@@ -439,6 +441,7 @@ bool SCH_EDIT_FRAME::OnHotKey( wxDC* aDC, int aHotKey, const wxPoint& aPosition,
     case HK_ZOOM_REDRAW:
     case HK_ZOOM_CENTER:
     case HK_ZOOM_AUTO:
+    case HK_LEAVE_SHEET:
     case HK_MOVEBLOCK_TO_DRAGBLOCK:          // Switch to drag mode, when block moving
     case HK_SAVE_BLOCK:                      // Copy block to paste buffer.
         cmd.SetId( hotKey->m_IdMenuEvent );

eeschema/hotkeys.h

@@ -76,7 +76,8 @@ enum hotkey_id_commnand {
     HK_SAVE_SCH,
     HK_LOAD_SCH,
     HK_LEFT_CLICK,
-    HK_LEFT_DCLICK
+    HK_LEFT_DCLICK,
+    HK_LEAVE_SHEET
 };
 
 // List of hotkey descriptors for Eeschema

eeschema/menubar.cpp

@@ -252,9 +252,11 @@ void SCH_EDIT_FRAME::ReCreateMenuBar()
                  _( "Navigate hierarchical sheets" ),
                  KiBitmap( hierarchy_nav_xpm ) );
 
+    text = AddHotkeyName( _( "&Leave Sheet" ), g_Schematic_Hokeys_Descr, HK_LEAVE_SHEET );
+
     AddMenuItem( viewMenu,
                  ID_POPUP_SCH_LEAVE_SHEET,
-                 _( "&Leave Sheet" ),
+                 text,
                  _( "Leave Sheet" ),
                  KiBitmap( leave_sheet_xpm ) );
 

eeschema/schedit.cpp

@@ -315,8 +315,12 @@ void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
         break;
 
     case ID_POPUP_SCH_LEAVE_SHEET:
-        m_CurrentSheet->Pop();
-        DisplayCurrentSheet();
+        if( m_CurrentSheet->Last() != g_RootSheet )
+        {
+            m_CurrentSheet->Pop();
+            DisplayCurrentSheet();
+        }
+
         break;
 
     case wxID_COPY:         // really this is a Save block for paste

eeschema/schframe.cpp

@@ -781,7 +781,6 @@ void SCH_EDIT_FRAME::OnUpdateSave( wxUpdateUIEvent& aEvent )
     SCH_SHEET_LIST sheetList;
 
     aEvent.Enable( sheetList.IsModified() );
-
 }
 
 
@@ -795,7 +794,6 @@ void SCH_EDIT_FRAME::OnUpdateSaveSheet( wxUpdateUIEvent& aEvent )
 void SCH_EDIT_FRAME::OnUpdateHierarchySheet( wxUpdateUIEvent& aEvent )
 {
     aEvent.Enable( m_CurrentSheet->Last() != g_RootSheet );
-
 }