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kicad/include/tool/tool_event.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@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 __TOOL_EVENT_H
#define __TOOL_EVENT_H
#include <cstdio>
#include <deque>
#include <iterator>
#include <math/vector2d.h>
#include <core/optional.h>
#ifdef WX_COMPATIBILITY
#include <wx/debug.h>
#else
#include <cassert>
#endif
class TOOL_ACTION;
class TOOL_MANAGER;
class TOOL_BASE;
/**
* Internal (GUI-independent) event definitions.
* Enums are mostly self-explanatory.
*/
enum TOOL_EVENT_CATEGORY
{
TC_NONE = 0x00,
TC_MOUSE = 0x01,
TC_KEYBOARD = 0x02,
TC_COMMAND = 0x04,
TC_MESSAGE = 0x08,
TC_VIEW = 0x10,
TC_ANY = 0xffffffff
};
enum TOOL_ACTIONS
{
// UI input events
TA_NONE = 0x0000,
TA_MOUSE_CLICK = 0x0001,
TA_MOUSE_DBLCLICK = 0x0002,
TA_MOUSE_UP = 0x0004,
TA_MOUSE_DOWN = 0x0008,
TA_MOUSE_DRAG = 0x0010,
TA_MOUSE_MOTION = 0x0020,
TA_MOUSE_WHEEL = 0x0040,
TA_MOUSE = 0x007f,
TA_KEY_PRESSED = 0x0080,
TA_KEYBOARD = TA_KEY_PRESSED,
// View related events
TA_VIEW_REFRESH = 0x0100,
TA_VIEW_ZOOM = 0x0200,
TA_VIEW_PAN = 0x0400,
TA_VIEW_DIRTY = 0x0800,
TA_VIEW = 0x0f00,
TA_CHANGE_LAYER = 0x1000,
// Tool cancel event. Issued automagically when the user hits escape or selects End Tool from
// the context menu.
TA_CANCEL_TOOL = 0x2000,
// Context menu update. Issued whenever context menu is open and the user hovers the mouse
// over one of choices. Used in dynamic highligting in disambiguation menu
TA_CHOICE_MENU_UPDATE = 0x4000,
// Context menu choice. Sent if the user picked something from the context menu or
// closed it without selecting anything.
TA_CHOICE_MENU_CHOICE = 0x8000,
// Context menu is closed, no matter whether anything has been chosen or not.
TA_CHOICE_MENU_CLOSED = 0x10000,
TA_CHOICE_MENU = TA_CHOICE_MENU_UPDATE | TA_CHOICE_MENU_CHOICE | TA_CHOICE_MENU_CLOSED,
// This event is sent *before* undo/redo command is performed.
TA_UNDO_REDO_PRE = 0x20000,
// This event is sent *after* undo/redo command is performed.
TA_UNDO_REDO_POST = 0x40000,
// Tool action (allows one to control tools).
TA_ACTION = 0x80000,
// Tool activation event.
TA_ACTIVATE = 0x100000,
// Model has changed (partial update).
TA_MODEL_CHANGE = 0x200000,
// Tool priming event (a special mouse click)
TA_PRIME = 0x400001,
TA_ANY = 0xffffffff
};
enum TOOL_MOUSE_BUTTONS
{
BUT_NONE = 0x0,
BUT_LEFT = 0x1,
BUT_RIGHT = 0x2,
BUT_MIDDLE = 0x4,
BUT_BUTTON_MASK = BUT_LEFT | BUT_RIGHT | BUT_MIDDLE,
BUT_ANY = 0xffffffff
};
enum TOOL_MODIFIERS
{
MD_SHIFT = 0x1000,
MD_CTRL = 0x2000,
MD_ALT = 0x4000,
MD_MODIFIER_MASK = MD_SHIFT | MD_CTRL | MD_ALT,
};
/// Scope of tool actions
enum TOOL_ACTION_SCOPE
{
AS_CONTEXT = 1, ///> Action belongs to a particular tool (i.e. a part of a pop-up menu)
AS_ACTIVE, ///> All active tools
AS_GLOBAL ///> Global action (toolbar/main menu event, global shortcut)
};
/// Flags for tool actions
enum TOOL_ACTION_FLAGS
{
AF_NONE = 0,
AF_ACTIVATE = 1, ///> Action activates a tool
AF_NOTIFY = 2 ///> Action is a notification (it is by default passed to all tools)
};
/// Defines when a context menu is opened.
enum CONTEXT_MENU_TRIGGER
{
CMENU_BUTTON = 0, // On the right button
CMENU_NOW, // Right now (after TOOL_INTERACTIVE::SetContextMenu)
CMENU_OFF // Never
};
/**
* TOOL_EVENT
*
* Generic, UI-independent tool event.
*/
class TOOL_EVENT
{
public:
/**
* Function Format()
* Returns information about event in form of a human-readable string.
*
* @return Event information.
*/
const std::string Format() const;
TOOL_EVENT( TOOL_EVENT_CATEGORY aCategory = TC_NONE, TOOL_ACTIONS aAction = TA_NONE,
TOOL_ACTION_SCOPE aScope = AS_GLOBAL, void* aParameter = nullptr ) :
m_category( aCategory ),
m_actions( aAction ),
m_scope( aScope ),
m_mouseButtons( 0 ),
m_keyCode( 0 ),
m_modifiers( 0 ),
m_param( aParameter ),
m_firstResponder( nullptr )
{
init();
}
TOOL_EVENT( TOOL_EVENT_CATEGORY aCategory, TOOL_ACTIONS aAction, int aExtraParam,
TOOL_ACTION_SCOPE aScope = AS_GLOBAL, void* aParameter = nullptr ) :
m_category( aCategory ),
m_actions( aAction ),
m_scope( aScope ),
m_mouseButtons( 0 ),
m_keyCode( 0 ),
m_modifiers( 0 ),
m_param( aParameter ),
m_firstResponder( nullptr )
{
if( aCategory == TC_MOUSE )
{
setMouseButtons( aExtraParam & BUT_BUTTON_MASK );
}
else if( aCategory == TC_KEYBOARD )
{
m_keyCode = aExtraParam & ~MD_MODIFIER_MASK; // Filter out modifiers
}
else if( aCategory == TC_COMMAND )
{
m_commandId = aExtraParam;
}
if( aCategory & ( TC_MOUSE | TC_KEYBOARD ) )
{
m_modifiers = aExtraParam & MD_MODIFIER_MASK;
}
init();
}
TOOL_EVENT( TOOL_EVENT_CATEGORY aCategory, TOOL_ACTIONS aAction,
const std::string& aExtraParam, TOOL_ACTION_SCOPE aScope = AS_GLOBAL,
void* aParameter = nullptr ) :
m_category( aCategory ),
m_actions( aAction ),
m_scope( aScope ),
m_mouseButtons( 0 ),
m_keyCode( 0 ),
m_modifiers( 0 ),
m_param( aParameter ),
m_firstResponder( nullptr )
{
if( aCategory == TC_COMMAND || aCategory == TC_MESSAGE )
m_commandStr = aExtraParam;
init();
}
///> Returns the category (eg. mouse/keyboard/action) of an event..
TOOL_EVENT_CATEGORY Category() const { return m_category; }
///> Returns more specific information about the type of an event.
TOOL_ACTIONS Action() const { return m_actions; }
///> These give a tool a method of informing the TOOL_MANAGER that a particular event should
///> be passed on to subsequent tools on the stack. Defaults to true for TC_MESSAGES; false
///> for everything else.
bool PassEvent() const { return m_passEvent; }
void SetPassEvent( bool aPass = true ) { m_passEvent = aPass; }
///> Returns if it this event has a valid position (true for mouse events and context-menu
///> or hotkey-based command events)
bool HasPosition() const { return m_hasPosition; }
void SetHasPosition( bool aHasPosition ) { m_hasPosition = aHasPosition; }
TOOL_BASE* FirstResponder() const { return m_firstResponder; }
void SetFirstResponder( TOOL_BASE* aTool ) { m_firstResponder = aTool; }
///> Returns information about difference between current mouse cursor position and the place
///> where dragging has started.
const VECTOR2D Delta() const
{
return returnCheckedPosition( m_mouseDelta );
}
///> Returns mouse cursor position in world coordinates.
const VECTOR2D Position() const
{
return returnCheckedPosition( m_mousePos );
}
///> Returns the point where dragging has started.
const VECTOR2D DragOrigin() const
{
return returnCheckedPosition( m_mouseDragOrigin );
}
///> Returns information about mouse buttons state.
int Buttons() const
{
assert( m_category == TC_MOUSE ); // this should be used only with mouse events
return m_mouseButtons;
}
bool IsClick( int aButtonMask = BUT_ANY ) const;
bool IsDblClick( int aButtonMask = BUT_ANY ) const;
bool IsDrag( int aButtonMask = BUT_ANY ) const
{
return m_actions == TA_MOUSE_DRAG && ( m_mouseButtons & aButtonMask ) == m_mouseButtons;
}
bool IsMouseUp( int aButtonMask = BUT_ANY ) const
{
return m_actions == TA_MOUSE_UP && ( m_mouseButtons & aButtonMask ) == m_mouseButtons;
}
bool IsMotion() const
{
return m_actions == TA_MOUSE_MOTION;
}
bool IsMouseAction() const
{
return ( m_actions & TA_MOUSE );
}
bool IsCancel() const
{
return m_actions == TA_CANCEL_TOOL;
}
bool IsActivate() const
{
return m_actions == TA_ACTIVATE;
}
bool IsUndoRedo() const
{
return m_actions & ( TA_UNDO_REDO_PRE | TA_UNDO_REDO_POST );
}
bool IsChoiceMenu() const
{
return m_actions & TA_CHOICE_MENU;
}
bool IsPrime() const
{
return m_actions == TA_PRIME;
}
///> Returns information about key modifiers state (Ctrl, Alt, etc.)
int Modifier( int aMask = MD_MODIFIER_MASK ) const
{
return m_modifiers & aMask;
}
int KeyCode() const
{
return m_keyCode;
}
bool IsKeyPressed() const
{
return m_actions == TA_KEY_PRESSED;
}
/**
* Function Matches()
* Tests whether two events match in terms of category & action or command.
*
* @param aEvent is the event to test against.
* @return True if two events match, false otherwise.
*/
bool Matches( const TOOL_EVENT& aEvent ) const
{
if( !( m_category & aEvent.m_category ) )
return false;
if( m_category == TC_COMMAND || m_category == TC_MESSAGE )
{
if( (bool) m_commandStr && (bool) aEvent.m_commandStr )
return *m_commandStr == *aEvent.m_commandStr;
if( (bool) m_commandId && (bool) aEvent.m_commandId )
return *m_commandId == *aEvent.m_commandId;
}
// BUGFIX: TA_ANY should match EVERYTHING, even TA_NONE (for TC_MESSAGE)
if( m_actions == TA_ANY && aEvent.m_actions == TA_NONE && aEvent.m_category == TC_MESSAGE )
return true;
// BUGFIX: This check must happen after the TC_COMMAND check because otherwise events of
// the form { TC_COMMAND, TA_NONE } will be incorrectly skipped
if( !( m_actions & aEvent.m_actions ) )
return false;
return true;
}
/**
* Function IsAction()
* Tests if the event contains an action issued upon activation of the given TOOL_ACTION.
* @param aAction is the TOOL_ACTION to be checked against.
* @return True if it matches the given TOOL_ACTION.
*/
bool IsAction( const TOOL_ACTION* aAction ) const;
/**
* Function IsCancelInteractive()
*
* Indicates the event should restart/end an ongoing interactive tool's event loop (eg esc
* key, click cancel, start different tool).
*/
bool IsCancelInteractive();
/**
* Function IsSelectionEvent()
*
* Indicates an selection-changed notification event.
*/
bool IsSelectionEvent();
/**
* Function IsPointEditor
*
* Indicates if the event is from one of the point editors. Usually used to allow the
* point editor to activate itself without de-activating the current drawing tool.
*/
bool IsPointEditor();
/**
* Function IsMoveTool
*
* Indicates if the event is from one of the move tools. Usually used to allow move to
* be done without de-activating the current drawing tool.
*/
bool IsMoveTool();
/**
* Function Parameter()
* Returns a non-standard parameter assigned to the event. Its meaning depends on the
* target tool.
*/
template<typename T>
inline T Parameter() const
{
// Exhibit #798 on why I love to hate C++
// - reinterpret_cast needs to be used for pointers
// - static_cast must be used for enums
// - templates can't usefully distinguish between pointer and non-pointer types
// Fortunately good old C's cast can be a reinterpret_cast or a static_cast, and
// C99 gave us intptr_t which is guaranteed to be round-trippable with a pointer.
return (T) reinterpret_cast<intptr_t>( m_param );
}
/**
* Function SetParameter()
* Sets a non-standard parameter assigned to the event. Its meaning depends on the
* target tool.
* @param aParam is the new parameter.
*/
template<typename T>
void SetParameter(T aParam)
{
m_param = (void*) aParam;
}
OPT<int> GetCommandId() const
{
return m_commandId;
}
OPT<std::string> GetCommandStr() const
{
return m_commandStr;
}
void SetMousePosition( const VECTOR2D& aP )
{
m_mousePos = aP;
}
private:
friend class TOOL_DISPATCHER;
void init();
void setMouseDragOrigin( const VECTOR2D& aP )
{
m_mouseDragOrigin = aP;
}
void setMouseDelta( const VECTOR2D& aP )
{
m_mouseDelta = aP;
}
void setMouseButtons( int aButtons )
{
assert( ( aButtons & ~BUT_BUTTON_MASK ) == 0 );
m_mouseButtons = aButtons;
}
void setModifiers( int aMods )
{
assert( ( aMods & ~MD_MODIFIER_MASK ) == 0 );
m_modifiers = aMods;
}
/**
* Ensure that the event is a type that has a position before returning a
* position, otherwise return a null-constructed position.
* Used to defend the position accessors from runtime access when the event
* does not have a valid position.
*
* @param aPos the position to return if the event is valid
* @return the checked position
*/
VECTOR2D returnCheckedPosition( const VECTOR2D& aPos ) const
{
#ifdef WX_COMPATIBILITY
wxCHECK_MSG( HasPosition(), VECTOR2D(),
"Attempted to get position from non-position event" );
#else
assert( HasPosition() );
#endif
return aPos;
}
TOOL_EVENT_CATEGORY m_category;
TOOL_ACTIONS m_actions;
TOOL_ACTION_SCOPE m_scope;
bool m_passEvent;
bool m_hasPosition;
///> Difference between mouse cursor position and
///> the point where dragging event has started
VECTOR2D m_mouseDelta;
///> Current mouse cursor position
VECTOR2D m_mousePos;
///> Point where dragging has started
VECTOR2D m_mouseDragOrigin;
///> State of mouse buttons
int m_mouseButtons;
///> Stores code of pressed/released key
int m_keyCode;
///> State of key modifierts (Ctrl/Alt/etc.)
int m_modifiers;
///> Generic parameter used for passing non-standard data.
void* m_param;
///> The first tool to receive the event
TOOL_BASE* m_firstResponder;
OPT<int> m_commandId;
OPT<std::string> m_commandStr;
};
typedef OPT<TOOL_EVENT> OPT_TOOL_EVENT;
/**
* TOOL_EVENT_LIST
*
* A list of TOOL_EVENTs, with overloaded || operators allowing for
* concatenating TOOL_EVENTs with little code.
*/
class TOOL_EVENT_LIST
{
public:
typedef TOOL_EVENT value_type;
typedef std::deque<TOOL_EVENT>::iterator iterator;
typedef std::deque<TOOL_EVENT>::const_iterator const_iterator;
///> Default constructor. Creates an empty list.
TOOL_EVENT_LIST()
{}
///> Constructor for a list containing only one TOOL_EVENT.
TOOL_EVENT_LIST( const TOOL_EVENT& aSingleEvent )
{
m_events.push_back( aSingleEvent );
}
///> Copy an existing TOOL_EVENT_LIST
TOOL_EVENT_LIST( const TOOL_EVENT_LIST& aEventList ) = default;
/**
* Function Format()
* Returns information about event in form of a human-readable string.
*
* @return Event information.
*/
const std::string Format() const;
OPT<const TOOL_EVENT&> Matches( const TOOL_EVENT& aEvent ) const
{
for( const TOOL_EVENT& event : m_events )
{
if( event.Matches( aEvent ) )
return event;
}
return OPT<const TOOL_EVENT&>();
}
/**
* Function Add()
* Adds a tool event to the list.
* @param aEvent is the tool event to be addded.
*/
void Add( const TOOL_EVENT& aEvent )
{
m_events.push_back( aEvent );
}
iterator begin()
{
return m_events.begin();
}
iterator end()
{
return m_events.end();
}
const_iterator cbegin() const
{
return m_events.begin();
}
const_iterator cend() const
{
return m_events.end();
}
int size() const
{
return m_events.size();
}
void clear()
{
m_events.clear();
}
TOOL_EVENT_LIST& operator=( const TOOL_EVENT_LIST& aEventList )
{
m_events.clear();
for( const TOOL_EVENT& event : aEventList.m_events )
m_events.push_back( event );
return *this;
}
TOOL_EVENT_LIST& operator=( const TOOL_EVENT& aEvent )
{
m_events.clear();
m_events.push_back( aEvent );
return *this;
}
TOOL_EVENT_LIST& operator||( const TOOL_EVENT& aEvent )
{
Add( aEvent );
return *this;
}
TOOL_EVENT_LIST& operator||( const TOOL_EVENT_LIST& aEvent )
{
std::copy( aEvent.m_events.begin(), aEvent.m_events.end(), std::back_inserter( m_events ) );
return *this;
}
private:
std::deque<TOOL_EVENT> m_events;
};
inline const TOOL_EVENT_LIST operator||( const TOOL_EVENT& aEventA, const TOOL_EVENT& aEventB )
{
TOOL_EVENT_LIST l;
l.Add( aEventA );
l.Add( aEventB );
return l;
}
inline const TOOL_EVENT_LIST operator||( const TOOL_EVENT& aEvent,
const TOOL_EVENT_LIST& aEventList )
{
TOOL_EVENT_LIST l( aEventList );
l.Add( aEvent );
return l;
}
#endif
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