/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#include "qwt_event_pattern.h"
#include <qevent.h>

/*!
  Constructor

  \sa MousePatternCode, KeyPatternCode
*/

QwtEventPattern::QwtEventPattern():
    d_mousePattern( MousePatternCount ),
    d_keyPattern( KeyPatternCount )
{
    initKeyPattern();
    initMousePattern( 3 );
}

//! Destructor
QwtEventPattern::~QwtEventPattern()
{
}

/*!
  Set default mouse patterns, depending on the number of mouse buttons

  \param numButtons Number of mouse buttons ( <= 3 )
  \sa MousePatternCode
*/
void QwtEventPattern::initMousePattern( int numButtons )
{
    const int altButton = Qt::AltModifier;
    const int controlButton = Qt::ControlModifier;
    const int shiftButton = Qt::ShiftModifier;

    d_mousePattern.resize( MousePatternCount );

    switch ( numButtons )
    {
        case 1:
        {
            setMousePattern( MouseSelect1, Qt::LeftButton );
            setMousePattern( MouseSelect2, Qt::LeftButton, controlButton );
            setMousePattern( MouseSelect3, Qt::LeftButton, altButton );
            break;
        }
        case 2:
        {
            setMousePattern( MouseSelect1, Qt::LeftButton );
            setMousePattern( MouseSelect2, Qt::RightButton );
            setMousePattern( MouseSelect3, Qt::LeftButton, altButton );
            break;
        }
        default:
        {
            setMousePattern( MouseSelect1, Qt::LeftButton );
            setMousePattern( MouseSelect2, Qt::RightButton );
            setMousePattern( MouseSelect3, Qt::MidButton );
        }
    }
    for ( int i = 0; i < 3; i++ )
    {
        setMousePattern( MouseSelect4 + i,
                         d_mousePattern[MouseSelect1 + i].button,
                         d_mousePattern[MouseSelect1 + i].state | shiftButton );
    }
}

/*!
  Set default mouse patterns.

  \sa KeyPatternCode
*/
void QwtEventPattern::initKeyPattern()
{
    d_keyPattern.resize( KeyPatternCount );

    setKeyPattern( KeySelect1, Qt::Key_Return );
    setKeyPattern( KeySelect2, Qt::Key_Space );
    setKeyPattern( KeyAbort, Qt::Key_Escape );

    setKeyPattern( KeyLeft, Qt::Key_Left );
    setKeyPattern( KeyRight, Qt::Key_Right );
    setKeyPattern( KeyUp, Qt::Key_Up );
    setKeyPattern( KeyDown, Qt::Key_Down );

    setKeyPattern( KeyRedo, Qt::Key_Plus );
    setKeyPattern( KeyUndo, Qt::Key_Minus );
    setKeyPattern( KeyHome, Qt::Key_Escape );
}

/*!
  Change one mouse pattern

  \param pattern Index of the pattern
  \param button Button
  \param state State

  \sa QMouseEvent
*/
void QwtEventPattern::setMousePattern( uint pattern, int button, int state )
{
    if ( pattern < ( uint )d_mousePattern.count() )
    {
        d_mousePattern[int( pattern )].button = button;
        d_mousePattern[int( pattern )].state = state;
    }
}

/*!
  Change one key pattern

  \param pattern Index of the pattern
  \param key Key
  \param state State

  \sa QKeyEvent
*/
void QwtEventPattern::setKeyPattern( uint pattern, int key, int state )
{
    if ( pattern < ( uint )d_keyPattern.count() )
    {
        d_keyPattern[int( pattern )].key = key;
        d_keyPattern[int( pattern )].state = state;
    }
}

//! Change the mouse event patterns
void QwtEventPattern::setMousePattern( const QVector<MousePattern> &pattern )
{
    d_mousePattern = pattern;
}

//! Change the key event patterns
void QwtEventPattern::setKeyPattern( const QVector<KeyPattern> &pattern )
{
    d_keyPattern = pattern;
}

//! Return mouse patterns
const QVector<QwtEventPattern::MousePattern> &
QwtEventPattern::mousePattern() const
{
    return d_mousePattern;
}

//! Return key patterns
const QVector<QwtEventPattern::KeyPattern> &
QwtEventPattern::keyPattern() const
{
    return d_keyPattern;
}

//! Return ,ouse patterns
QVector<QwtEventPattern::MousePattern> &QwtEventPattern::mousePattern()
{
    return d_mousePattern;
}

//! Return Key patterns
QVector<QwtEventPattern::KeyPattern> &QwtEventPattern::keyPattern()
{
    return d_keyPattern;
}

/*!
  \brief Compare a mouse event with an event pattern.

  A mouse event matches the pattern when both have the same button
  value and in the state value the same key flags(Qt::KeyButtonMask)
  are set.

  \param pattern Index of the event pattern
  \param event Mouse event
  \return true if matches

  \sa keyMatch()
*/
bool QwtEventPattern::mouseMatch( uint pattern, 
    const QMouseEvent *event ) const
{
    bool ok = false;

    if ( event && pattern < ( uint )d_mousePattern.count() )
        ok = mouseMatch( d_mousePattern[int( pattern )], event );

    return ok;
}

/*!
  \brief Compare a mouse event with an event pattern.

  A mouse event matches the pattern when both have the same button
  value and in the state value the same key flags(Qt::KeyButtonMask)
  are set.

  \param pattern Mouse event pattern
  \param event Mouse event
  \return true if matches

  \sa keyMatch()
*/

bool QwtEventPattern::mouseMatch( const MousePattern &pattern,
    const QMouseEvent *event ) const
{
    if ( event->button() != pattern.button )
        return false;

    const bool matched =
        ( event->modifiers() & Qt::KeyboardModifierMask ) ==
            ( int )( pattern.state & Qt::KeyboardModifierMask );

    return matched;
}

/*!
  \brief Compare a key event with an event pattern.

  A key event matches the pattern when both have the same key
  value and in the state value the same key flags (Qt::KeyButtonMask)
  are set.

  \param pattern Index of the event pattern
  \param event Key event
  \return true if matches

  \sa mouseMatch()
*/
bool QwtEventPattern::keyMatch( uint pattern, 
    const QKeyEvent *event ) const
{
    bool ok = false;

    if ( event && pattern < ( uint )d_keyPattern.count() )
        ok = keyMatch( d_keyPattern[int( pattern )], event );

    return ok;
}

/*!
  \brief Compare a key event with an event pattern.

  A key event matches the pattern when both have the same key
  value and in the state value the same key flags (Qt::KeyButtonMask)
  are set.

  \param pattern Key event pattern
  \param event Key event
  \return true if matches

  \sa mouseMatch()
*/

bool QwtEventPattern::keyMatch(
    const KeyPattern &pattern, const QKeyEvent *event ) const
{
    if ( event->key() != pattern.key )
        return false;

    const bool matched =
        ( event->modifiers() & Qt::KeyboardModifierMask ) ==
            ( int )( pattern.state & Qt::KeyboardModifierMask );

    return matched;
}