Introduced SELECTION_CONDITIONS to determine which menu entries should be visible in the SELECTION_TOOL context menu, depending on the selection.

common/tool/context_menu.cpp

@@ -71,6 +71,47 @@ CONTEXT_MENU::CONTEXT_MENU( const CONTEXT_MENU& aMenu ) :
 }
 
 
+CONTEXT_MENU& CONTEXT_MENU::operator=( const CONTEXT_MENU& aMenu )
+{
+    Clear();
+
+    m_titleSet = aMenu.m_titleSet;
+    m_selected = aMenu.m_selected;
+    m_tool = aMenu.m_tool;
+    m_toolActions = aMenu.m_toolActions;
+    m_customHandler = aMenu.m_customHandler;
+
+    // Copy all the menu entries
+    for( unsigned i = 0; i < aMenu.GetMenuItemCount(); ++i )
+    {
+        wxMenuItem* item = aMenu.FindItemByPosition( i );
+
+        if( item->IsSubMenu() )
+        {
+#ifdef DEBUG
+            // Submenus of a CONTEXT_MENU are supposed to be CONTEXT_MENUs as well
+            assert( dynamic_cast<CONTEXT_MENU*>( item->GetSubMenu() ) );
+#endif
+
+            CONTEXT_MENU* menu = new CONTEXT_MENU( static_cast<const CONTEXT_MENU&>( *item->GetSubMenu() ) );
+            AppendSubMenu( menu, item->GetItemLabel(), wxEmptyString );
+        }
+        else
+        {
+            wxMenuItem* newItem = new wxMenuItem( this, item->GetId(), item->GetItemLabel(),
+                    wxEmptyString, item->GetKind() );
+
+            Append( newItem );
+            copyItem( item, newItem );
+        }
+    }
+
+    setupEvents();
+
+    return *this;
+}
+
+
 void CONTEXT_MENU::setupEvents()
 {
     Connect( wxEVT_MENU_HIGHLIGHT, wxEventHandler( CONTEXT_MENU::onMenuEvent ), NULL, this );
@@ -144,11 +185,12 @@ void CONTEXT_MENU::Clear()
 {
     m_titleSet = false;
 
-    // Remove all the entries from context menu
+    GetMenuItems().DeleteContents( true );
-    for( unsigned i = 0; i < GetMenuItemCount(); ++i )
+    GetMenuItems().Clear();
-        Destroy( FindItemByPosition( 0 ) );
-
     m_toolActions.clear();
+    GetMenuItems().DeleteContents( false ); // restore the default so destructor does not go wild
+
+    assert( GetMenuItemCount() == 0 );
 }
 
 

include/tool/context_menu.h

@@ -47,7 +47,9 @@ public:
     ///> Copy constructor
     CONTEXT_MENU( const CONTEXT_MENU& aMenu );
 
-    virtual ~CONTEXT_MENU() {};
+    CONTEXT_MENU& operator=( const CONTEXT_MENU& aMenu );
+
+    virtual ~CONTEXT_MENU() {}
 
     /**
      * Function SetTitle()
@@ -74,7 +76,6 @@ public:
      */
     void Add( const TOOL_ACTION& aAction );
 
-
     /**
      * Function Clear()
      * Removes all the entries from the menu (as well as its title). It leaves the menu in the

include/tool/tool_event.h

@@ -328,10 +328,10 @@ public:
 
         if( m_category == TC_COMMAND || m_category == TC_MESSAGE )
         {
-            if( m_commandStr && aEvent.m_commandStr )
+            if( (bool) m_commandStr && (bool) aEvent.m_commandStr )
                 return *m_commandStr == *aEvent.m_commandStr;
 
-            if( m_commandId && aEvent.m_commandId )
+            if( (bool) m_commandId && (bool) aEvent.m_commandId )
                 return *m_commandId == *aEvent.m_commandId;
         }
 

pcbnew/CMakeLists.txt

@@ -258,6 +258,7 @@ set( PCBNEW_CLASS_SRCS
 
     tools/selection_tool.cpp
     tools/selection_area.cpp
+    tools/selection_conditions.cpp
     tools/bright_box.cpp
     tools/edit_points.cpp
     tools/edit_constraints.cpp

pcbnew/tools/edit_tool.cpp

@@ -59,11 +59,11 @@ bool EDIT_TOOL::Init()
     }
 
     // Add context menu entries that are displayed when selection tool is active
-    m_selectionTool->AddMenuItem( COMMON_ACTIONS::editActivate );
+    m_selectionTool->AddMenuItem( COMMON_ACTIONS::editActivate, SELECTION_CONDITIONS::NotEmpty );
-    m_selectionTool->AddMenuItem( COMMON_ACTIONS::rotate );
+    m_selectionTool->AddMenuItem( COMMON_ACTIONS::rotate, SELECTION_CONDITIONS::NotEmpty );
-    m_selectionTool->AddMenuItem( COMMON_ACTIONS::flip );
+    m_selectionTool->AddMenuItem( COMMON_ACTIONS::flip, SELECTION_CONDITIONS::NotEmpty );
-    m_selectionTool->AddMenuItem( COMMON_ACTIONS::remove );
+    m_selectionTool->AddMenuItem( COMMON_ACTIONS::remove, SELECTION_CONDITIONS::NotEmpty );
-    m_selectionTool->AddMenuItem( COMMON_ACTIONS::properties );
+    m_selectionTool->AddMenuItem( COMMON_ACTIONS::properties, SELECTION_CONDITIONS::NotEmpty );
 
     setTransitions();
 

pcbnew/tools/placement_tool.cpp

@@ -63,7 +63,8 @@ bool PLACEMENT_TOOL::Init()
     menu->AppendSeparator();
     menu->Add( COMMON_ACTIONS::distributeHorizontally );
     menu->Add( COMMON_ACTIONS::distributeVertically );
-    m_selectionTool->AddSubMenu( menu, wxString( "Align/distribute" ) );
+    m_selectionTool->AddSubMenu( menu, wxString( "Align/distribute" ),
+                                 SELECTION_CONDITIONS::MoreThan( 1 ) );
 
     setTransitions();
 

pcbnew/tools/selection_conditions.cpp

@@ -0,0 +1,120 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2014 CERN
+ * @author Maciej Suminski <maciej.suminski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include "selection_conditions.h"
+#include "selection_tool.h"
+
+#include <boost/bind.hpp>
+
+
+bool SELECTION_CONDITIONS::NotEmpty( const SELECTION& aSelection )
+{
+    return !aSelection.Empty();
+}
+
+
+SELECTION_CONDITION SELECTION_CONDITIONS::HasType( KICAD_T aType )
+{
+    return boost::bind( &SELECTION_CONDITIONS::hasTypeFunc, _1, aType );
+}
+
+
+SELECTION_CONDITION SELECTION_CONDITIONS::OnlyType( KICAD_T aType )
+{
+    return boost::bind( &SELECTION_CONDITIONS::onlyTypeFunc, _1, aType );
+}
+
+
+SELECTION_CONDITION SELECTION_CONDITIONS::Count( int aNumber )
+{
+    return boost::bind( &SELECTION_CONDITIONS::countFunc, _1, aNumber );
+}
+
+
+SELECTION_CONDITION SELECTION_CONDITIONS::MoreThan( int aNumber )
+{
+    return boost::bind( &SELECTION_CONDITIONS::moreThanFunc, _1, aNumber );
+}
+
+
+SELECTION_CONDITION SELECTION_CONDITIONS::LessThan( int aNumber )
+{
+    return boost::bind( &SELECTION_CONDITIONS::lessThanFunc, _1, aNumber );
+}
+
+
+bool SELECTION_CONDITIONS::hasTypeFunc( const SELECTION& aSelection, KICAD_T aType )
+{
+    for( int i = 0; i < aSelection.Size(); ++i )
+    {
+        if( aSelection.Item<EDA_ITEM>( i )->Type() == aType )
+            return true;
+    }
+
+    return false;
+}
+
+
+bool SELECTION_CONDITIONS::onlyTypeFunc( const SELECTION& aSelection, KICAD_T aType )
+{
+    for( int i = 0; i < aSelection.Size(); ++i )
+    {
+        if( aSelection.Item<EDA_ITEM>( i )->Type() != aType )
+            return false;
+    }
+
+    return true;
+}
+
+
+bool SELECTION_CONDITIONS::countFunc( const SELECTION& aSelection, int aNumber )
+{
+    return aSelection.Size() == aNumber;
+}
+
+
+bool SELECTION_CONDITIONS::moreThanFunc( const SELECTION& aSelection, int aNumber )
+{
+    return aSelection.Size() > aNumber;
+}
+
+
+bool SELECTION_CONDITIONS::lessThanFunc( const SELECTION& aSelection, int aNumber )
+{
+    return aSelection.Size() > aNumber;
+}
+
+
+SELECTION_CONDITION operator||( const SELECTION_CONDITION& aConditionA,
+                                const SELECTION_CONDITION& aConditionB )
+{
+    return boost::bind( &SELECTION_CONDITIONS::orFunc, aConditionA, aConditionB, _1 );
+}
+
+
+SELECTION_CONDITION operator&&( const SELECTION_CONDITION& aConditionA,
+                                const SELECTION_CONDITION& aConditionB )
+{
+    return boost::bind( &SELECTION_CONDITIONS::andFunc, aConditionA, aConditionB, _1 );
+}

pcbnew/tools/selection_conditions.h

@@ -0,0 +1,148 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2014 CERN
+ * @author Maciej Suminski <maciej.suminski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef SELECTION_CONDITIONS_H_
+#define SELECTION_CONDITIONS_H_
+
+#include <boost/function.hpp>
+#include <core/typeinfo.h>
+
+class SELECTION;
+
+///> Functor type that checks a specific condition for selected items.
+typedef boost::function<bool (const SELECTION&)> SELECTION_CONDITION;
+
+SELECTION_CONDITION operator||( const SELECTION_CONDITION& aConditionA,
+                                const SELECTION_CONDITION& aConditionB );
+
+SELECTION_CONDITION operator&&( const SELECTION_CONDITION& aConditionA,
+                                const SELECTION_CONDITION& aConditionB );
+
+
+/**
+ * Class that groups generic conditions for selected items.
+ */
+class SELECTION_CONDITIONS
+{
+public:
+    /**
+     * Function ShowAlways
+     * The default condition function (always returns true).
+     * @param aSelection is the selection to be tested.
+     * @return Always true;
+     */
+    static bool ShowAlways( const SELECTION& aSelection )
+    {
+        return true;
+    }
+
+    /**
+     * Function NotEmpty
+     * Tests if there are any items selected.
+     * @param aSelection is the selection to be tested.
+     * @return True if there is at least one item selected.
+     */
+    static bool NotEmpty( const SELECTION& aSelection );
+
+    /**
+     * Function HasType
+     * Creates functor that tests if among the selected items there is at least one of a given type.
+     * @param aType is the type that is searched.
+     * @return Functor testing for presence of items of a given type.
+     */
+    static SELECTION_CONDITION HasType( KICAD_T aType );
+
+    /**
+     * Function OnlyType
+     * Creates functor that tests if the selected items are *only* of given type.
+     * @param aType is the type that is searched.
+     * @return Functor testing if selected items are exclusively of one type..
+     */
+    static SELECTION_CONDITION OnlyType( KICAD_T aType );
+
+    /**
+     * Function Count
+     * Creates functor that tests if the number of selected items is equal to the value given as
+     * parameter.
+     * @param aNumber is the number of expected items.
+     * @return Functor testing if the number of selected items is equal aNumber.
+     */
+    static SELECTION_CONDITION Count( int aNumber );
+
+    /**
+     * Function MoreThan
+     * Creates functor that tests if the number of selected items is greater than the value given
+     * as parameter.
+     * @param aNumber is the number used for comparison.
+     * @return Functor testing if the number of selected items is greater than aNumber.
+     */
+    static SELECTION_CONDITION MoreThan( int aNumber );
+
+    /**
+     * Function LessThan
+     * Creates functor that tests if the number of selected items is smaller than the value given
+     * as parameter.
+     * @param aNumber is the number used for comparison.
+     * @return Functor testing if the number of selected items is smaller than aNumber.
+     */
+    static SELECTION_CONDITION LessThan( int aNumber );
+
+private:
+    ///> Helper function used by HasType()
+    static bool hasTypeFunc( const SELECTION& aSelection, KICAD_T aType );
+
+    ///> Helper function used by OnlyType()
+    static bool onlyTypeFunc( const SELECTION& aSelection, KICAD_T aType );
+
+    ///> Helper function used by Count()
+    static bool countFunc( const SELECTION& aSelection, int aNumber );
+
+    ///> Helper function used by MoreThan()
+    static bool moreThanFunc( const SELECTION& aSelection, int aNumber );
+
+    ///> Helper function used by LessThan()
+    static bool lessThanFunc( const SELECTION& aSelection, int aNumber );
+
+    ///> Helper function used by operator||
+    static bool orFunc( const SELECTION_CONDITION& aConditionA,
+                        const SELECTION_CONDITION& aConditionB, const SELECTION& aSelection )
+    {
+        return aConditionA( aSelection ) || aConditionB( aSelection );
+    }
+
+    ///> Helper function used by operator&&
+    static bool andFunc( const SELECTION_CONDITION& aConditionA,
+                         const SELECTION_CONDITION& aConditionB, const SELECTION& aSelection )
+    {
+        return aConditionA( aSelection ) && aConditionB( aSelection );
+    }
+
+    friend SELECTION_CONDITION operator||( const SELECTION_CONDITION& aConditionA,
+                                           const SELECTION_CONDITION& aConditionB );
+
+    friend SELECTION_CONDITION operator&&( const SELECTION_CONDITION& aConditionA,
+                                           const SELECTION_CONDITION& aConditionB );
+};
+
+#endif /* SELECTION_CONDITIONS_H_ */

pcbnew/tools/selection_tool.cpp

@@ -117,8 +117,7 @@ int SELECTION_TOOL::Main( TOOL_EVENT& aEvent )
             if( m_selection.Empty() )
                 selectSingle( evt->Position() );
 
-            if( !m_selection.Empty() )
+            generateMenu();
-                SetContextMenu( &m_menu, CMENU_NOW );
         }
 
         // double click? Display the properties window
@@ -188,17 +187,19 @@ int SELECTION_TOOL::Main( TOOL_EVENT& aEvent )
 }
 
 
-void SELECTION_TOOL::AddMenuItem( const TOOL_ACTION& aAction )
+void SELECTION_TOOL::AddMenuItem( const TOOL_ACTION& aAction, const SELECTION_CONDITION& aCondition )
 {
     assert( aAction.GetId() > 0 );    // Check if the action was registered before in ACTION_MANAGER
 
     m_menu.Add( aAction );
+    m_menuConditions.push_back( aCondition );
 }
 
 
-void SELECTION_TOOL::AddSubMenu( CONTEXT_MENU* aMenu, const wxString& aLabel )
+void SELECTION_TOOL::AddSubMenu( CONTEXT_MENU* aMenu, const wxString& aLabel, const SELECTION_CONDITION& aCondition )
 {
     m_menu.AppendSubMenu( aMenu, aLabel );
+    m_menuConditions.push_back( aCondition );
 }
 
 
@@ -420,9 +421,6 @@ void SELECTION_TOOL::clearSelection()
 
     getEditFrame<PCB_EDIT_FRAME>()->SetCurItem( NULL );
 
-    // Do not show the context menu when there is nothing selected
-    SetContextMenu( &m_menu, CMENU_OFF );
-
     // Inform other potentially interested tools
     TOOL_EVENT clearEvent( ClearedEvent );
     m_toolMgr->ProcessEvent( clearEvent );
@@ -622,14 +620,10 @@ void SELECTION_TOOL::select( BOARD_ITEM* aItem )
     ITEM_PICKER picker( aItem );
     m_selection.items.PushItem( picker );
 
-    // It is enough to do it only for the first selected item
     if( m_selection.Size() == 1 )
     {
         // Set as the current item, so the information about selection is displayed
         m_frame->SetCurItem( aItem, true );
-
-        // Now the context menu should be enabled
-        SetContextMenu( &m_menu, CMENU_BUTTON );
     }
     else if( m_selection.Size() == 2 )  // Check only for 2, so it will not be
     {                                   // called for every next selected item
@@ -655,12 +649,8 @@ void SELECTION_TOOL::deselect( BOARD_ITEM* aItem )
     if( itemIdx >= 0 )
         m_selection.items.RemovePicker( itemIdx );
 
-    // If there is nothing selected, disable the context menu
     if( m_selection.Empty() )
-    {
-        SetContextMenu( &m_menu, CMENU_OFF );
         m_frame->SetCurItem( NULL );
-    }
 
     // Inform other potentially interested tools
     TOOL_EVENT deselected( DeselectedEvent );
@@ -764,6 +754,28 @@ BOARD_ITEM* SELECTION_TOOL::prefer( GENERAL_COLLECTOR& aCollector, const KICAD_T
 }
 
 
+void SELECTION_TOOL::generateMenu()
+{
+    // Create a copy of the master context menu
+    m_menuCopy = m_menu;
+
+    assert( m_menuCopy.GetMenuItemCount() == m_menuConditions.size() );
+
+    // Filter out entries that does not apply to the current selection
+    for( int i = m_menuCopy.GetMenuItemCount() - 1; i >= 0; --i )
+    {
+        if( !m_menuConditions[i]( m_selection ) )
+        {
+            wxMenuItem* item = m_menuCopy.FindItemByPosition( i );
+            m_menuCopy.Destroy( item );
+        }
+    }
+
+    if( m_menuCopy.GetMenuItemCount() > 0 )
+    SetContextMenu( &m_menuCopy, CMENU_NOW );
+}
+
+
 void SELECTION::clear()
 {
     items.ClearItemsList();

pcbnew/tools/selection_tool.h

@@ -31,6 +31,8 @@
 #include <tool/context_menu.h>
 #include <class_undoredo_container.h>
 
+#include "selection_conditions.h"
+
 class PCB_BASE_FRAME;
 class SELECTION_AREA;
 class BOARD_ITEM;
@@ -118,8 +120,10 @@ public:
      *
      * Adds a menu entry to run a TOOL_ACTION on selected items.
      * @param aAction is a menu entry to be added.
+     * @param aCondition is a condition that has to be fulfilled to enable the menu entry.
      */
-    void AddMenuItem( const TOOL_ACTION& aAction );
+    void AddMenuItem( const TOOL_ACTION& aAction,
+                      const SELECTION_CONDITION& aCondition = SELECTION_CONDITIONS::ShowAlways );
 
     /**
      * Function AddSubMenu()
@@ -127,11 +131,14 @@ public:
      * Adds a submenu to the selection tool right-click context menu.
      * @param aMenu is the submenu to be added.
      * @param aLabel is the label of added submenu.
+     * @param aCondition is a condition that has to be fulfilled to enable the submenu entry.
      */
-    void AddSubMenu( CONTEXT_MENU* aMenu, const wxString& aLabel );
+    void AddSubMenu( CONTEXT_MENU* aMenu, const wxString& aLabel,
+                     const SELECTION_CONDITION& aCondition = SELECTION_CONDITIONS::ShowAlways );
 
     /**
      * Function EditModules()
+     *
      * Toggles edit module mode. When enabled, one may select parts of modules individually
      * (graphics, pads, etc.), so they can be modified.
      * @param aEnabled decides if the mode should be enabled.
@@ -275,26 +282,39 @@ private:
      */
     BOARD_ITEM* prefer( GENERAL_COLLECTOR& aCollector, const KICAD_T aTypes[] ) const;
 
+    /**
+     * Function generateMenu()
+     * Creates a copy of context menu that is filtered by menu conditions and displayed to
+     * the user.
+     */
+    void generateMenu();
+
     /// Pointer to the parent frame.
     PCB_BASE_FRAME* m_frame;
 
-    /// Visual representation of selection box
+    /// Visual representation of selection box.
     SELECTION_AREA* m_selArea;
 
-    /// Current state of selection
+    /// Current state of selection.
     SELECTION m_selection;
 
-    /// Flag saying if items should be added to the current selection or rather replace it
+    /// Flag saying if items should be added to the current selection or rather replace it.
     bool m_additive;
 
-    /// Flag saying if multiple selection mode is active
+    /// Flag saying if multiple selection mode is active.
     bool m_multiple;
 
-    /// Right click popup menu
+    /// Right click popup menu (master instance).
     CONTEXT_MENU m_menu;
 
-    /// Edit module mode flag
+    /// Copy of the context menu that is filtered by menu conditions and displayed to the user.
+    CONTEXT_MENU m_menuCopy;
+
+    /// Edit module mode flag.
     bool m_editModules;
+
+    /// Conditions for specific context menu entries.
+    std::deque<SELECTION_CONDITION> m_menuConditions;
 };
 
 #endif