Better management of the "Zoom to selection" tool in page layout editor.

- the useless "arrow tool" is removed.
- the "Zoom to selection" tool enable or disable the Zoom to selection (this is a on/off tool)
- When enabled, it can be disabled by the popup context menu, like in others applications.

pagelayout_editor/events_functions.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2013 CERN
- * Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
  * @author Jean-Pierre Charras, jp.charras at wanadoo.fr
  *
  * This program is free software; you can redistribute it and/or
@@ -97,13 +97,15 @@ BEGIN_EVENT_TABLE( PL_EDITOR_FRAME, EDA_DRAW_FRAME )
     EVT_CHOICE( ID_SELECT_COORDINATE_ORIGIN, PL_EDITOR_FRAME::OnSelectCoordOriginCorner)
     EVT_CHOICE( ID_SELECT_PAGE_NUMBER, PL_EDITOR_FRAME::Process_Special_Functions)
 
-    // Vertical toolbar:
+    // the ID_NO_TOOL_SELECTED id TOOL does not existing currently, but the right click
+    // popup menu can generate this event.
     EVT_TOOL( ID_NO_TOOL_SELECTED, PL_EDITOR_FRAME::Process_Special_Functions )
 
     EVT_MENU_RANGE( ID_POPUP_START_RANGE, ID_POPUP_END_RANGE,
                     PL_EDITOR_FRAME::Process_Special_Functions )
 
     EVT_UPDATE_UI( ID_NO_TOOL_SELECTED, PL_EDITOR_FRAME::OnUpdateSelectTool )
+
     EVT_UPDATE_UI( ID_ZOOM_SELECTION, PL_EDITOR_FRAME::OnUpdateSelectTool )
     EVT_UPDATE_UI( ID_SHOW_REAL_MODE, PL_EDITOR_FRAME::OnUpdateTitleBlockDisplayNormalMode )
     EVT_UPDATE_UI( ID_SHOW_PL_EDITOR_MODE, PL_EDITOR_FRAME::OnUpdateTitleBlockDisplaySpecialMode )
@@ -130,7 +132,11 @@ void PL_EDITOR_FRAME::Process_Special_Functions( wxCommandEvent& event )
         break;
 
     case ID_ZOOM_SELECTION:
+        // This tool is located on the main toolbar: switch it on or off on click
+        if( GetToolId() != ID_ZOOM_SELECTION )
             SetToolID( ID_ZOOM_SELECTION, wxCURSOR_MAGNIFIER, _( "Zoom to selection" ) );
+        else
+            SetToolID( ID_NO_TOOL_SELECTED, m_canvas->GetDefaultCursor(), wxEmptyString );
         break;
 
     case ID_SELECT_PAGE_NUMBER:
@@ -602,6 +608,5 @@ void PL_EDITOR_FRAME::OnUpdateTitleBlockDisplaySpecialMode( wxUpdateUIEvent& eve
 
 void PL_EDITOR_FRAME::OnUpdateSelectTool( wxUpdateUIEvent& aEvent )
 {
-    if( aEvent.GetEventObject() == m_mainToolBar )
     aEvent.Check( GetToolId() == aEvent.GetId() );
 }

pagelayout_editor/onrightclick.cpp

@@ -6,7 +6,7 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2013 Jean-Pierre Charras, jp.charras at wanadoo.fr
+ * Copyright (C) 2017 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2013 CERN
  *
  * This program is free software; you can redistribute it and/or
@@ -64,6 +64,14 @@ bool PL_EDITOR_FRAME::OnRightClick( const wxPoint& aPosition, wxMenu* aPopMenu )
     bool busy = GetScreen()->GetCurItem() != NULL;
     wxString msg;
 
+    // If the tool ID_ZOOM_SELECTION is currently in use, add a
+    if( GetToolId() == ID_ZOOM_SELECTION && !busy )
+    {
+        AddMenuItem( aPopMenu, ID_NO_TOOL_SELECTED, _( "End Tool" ),
+                     KiBitmap( cursor_xpm ) );
+        aPopMenu->AppendSeparator();
+    }
+
     if( ! busy )     // No item currently edited
     {
         WORKSHEET_DATAITEM* old_item = m_treePagelayout->GetPageLayoutSelectedItem();

pagelayout_editor/pl_editor_frame.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2013 CERN
- * Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
  * @author Jean-Pierre Charras, jp.charras at wanadoo.fr
  *
  * This program is free software; you can redistribute it and/or

pagelayout_editor/toolbars_pl_editor.cpp

@@ -92,10 +92,6 @@ void PL_EDITOR_FRAME::ReCreateHToolbar( void )
     m_mainToolBar->AddTool( ID_ZOOM_SELECTION, wxEmptyString, KiBitmap( zoom_area_xpm ),
                             _( "Zoom to selection" ), wxITEM_CHECK );
 
-    m_mainToolBar->AddSeparator();
-    m_mainToolBar->AddTool( ID_NO_TOOL_SELECTED, wxEmptyString, KiBitmap( cursor_xpm ),
-                            wxEmptyString, wxITEM_CHECK );
-
     // Display mode switch
     m_mainToolBar->AddSeparator();
     m_mainToolBar->AddTool( ID_SHOW_REAL_MODE, wxEmptyString,