vselecttool.cpp

/* This file is part of the KDE project
   Copyright (C) 2001, 2002, 2003 The Karbon Developers
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library 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
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#include <math.h>
#include <stdlib.h>
 
#include <tqcursor.h>
#include <tqlabel.h>
#include <tqradiobutton.h>
#include <tqbuttongroup.h>
 
#include <KoPoint.h>
#include <KoRect.h>
#include <kdebug.h>
 
#include <karbon_part.h>
#include <karbon_view.h>
#include <render/vpainter.h>
#include <render/vpainterfactory.h>
#include <core/vselection.h>
#include "vselecttool.h"
#include <commands/vtransformcmd.h>
#include <visitors/vselectiondesc.h>
#include <visitors/vselectobjects.h>
#include <widgets/vcanvas.h>
 
VSelectOptionsWidget::VSelectOptionsWidget( KarbonPart *part )
    : KDialogBase( 0L, "", true, i18n( "Selection" ), Ok | Cancel ), m_part( part )
{
    TQButtonGroup *group = new TQButtonGroup( 1, TQt::Horizontal, i18n( "Selection Mode" ), this );
 
    new TQRadioButton( i18n( "Select in current layer" ), group );
    new TQRadioButton( i18n( "Select in visible layers" ), group );
    new TQRadioButton( i18n( "Select in selected layers" ), group );
 
    group->setRadioButtonExclusive( true );
    group->setButton( part->document().selectionMode() );
 
    connect( group, TQ_SIGNAL( clicked( int ) ), this, TQ_SLOT( modeChange( int ) ) );
 
    group->setInsideMargin( 4 );
    group->setInsideSpacing( 2 );
 
    setMainWidget( group );
    setFixedSize( baseSize() );
} // VSelectOptionsWidget::VSelectOptionsWidget
 
void VSelectOptionsWidget::modeChange( int mode )
{
    m_part->document().setSelectionMode( (VDocument::VSelectionMode)mode );
} // VSelectOptionsWidget::modeChanged
 
VSelectTool::VSelectTool( KarbonView *view )
    : VTool( view, "tool_select" ), m_state( normal )
{
    m_lock = false;
    m_add = true;
    m_objects.setAutoDelete( true );
    m_optionsWidget = new VSelectOptionsWidget( view->part() );
    registerTool( this );
    connect( view, TQ_SIGNAL( selectionChange() ), this, TQ_SLOT( updateStatusBar() ) );
}
 
VSelectTool::~VSelectTool()
{
    delete m_optionsWidget;
}
 
void
VSelectTool::activate()
{
    VTool::activate();
    view()->setCursor( TQCursor( TQt::arrowCursor ) );
    view()->part()->document().selection()->showHandle();
    view()->part()->document().selection()->setSelectObjects();
    view()->part()->document().selection()->setState( VObject::selected );
    view()->part()->document().selection()->selectNodes();
    view()->repaintAll( view()->part()->document().selection()->boundingBox() );
    updateStatusBar();
}
 
TQString
VSelectTool::statusText()
{
    return i18n( "Select" );
}
 
TQString VSelectTool::contextHelp()
{
    TQString s = i18n( "<qt><b>Selection tool:</b><br>" );
    s += i18n( "<i>Select in current layer:</i><br>The selection is made in the layer selected in the layers docker.<br><br>" );
    s += i18n( "<i>Select in visible layers:</i><br>The selection is made in the visible layers (eye in the layers docker).<br><br>" );
    s += i18n( "<i>Select in selected layers:</i><br>The selection is made in the checked layers in the layers docker.<br><br>" );
    s += i18n( "<i>Position using arrow keys</i><br>The selection can be positioned up, down, left and right using the corresponding arrow keys." );
    return s;
} // VSelectTool::contextHelp
 
void
VSelectTool::draw()
{
    VPainter *painter = view()->painterFactory()->editpainter();
    //painter->setZoomFactor( view()->zoom() );
    painter->setRasterOp( TQt::NotROP );
 
    KoRect rect = view()->part()->document().selection()->boundingBox();
 
    if( m_state != normal )
    {
        VObjectListIterator itr = m_objects;
        for( ; itr.current(); ++itr )
        {
            itr.current()->draw( painter, &itr.current()->boundingBox() );
        }
    }
    else if( m_state == normal )
    {
        painter->setPen( TQt::DotLine );
        painter->newPath();
        painter->moveTo( KoPoint( first().x(), first().y() ) );
        painter->lineTo( KoPoint( m_current.x(), first().y() ) );
        painter->lineTo( KoPoint( m_current.x(), m_current.y() ) );
        painter->lineTo( KoPoint( first().x(), m_current.y() ) );
        painter->lineTo( KoPoint( first().x(), first().y() ) );
        painter->strokePath();
 
        m_state = normal;
    }
}
 
void
VSelectTool::setCursor() const
{
    if( m_state != normal || !view() ) return;
    switch( view()->part()->document().selection()->handleNode( last() ) )
    {
        case node_lt:
        case node_rb:
            view()->setCursor( TQCursor( TQt::SizeFDiagCursor ) );
            break;
        case node_rt:
        case node_lb:
            view()->setCursor( TQCursor( TQt::SizeBDiagCursor ) );
            break;
        case node_lm:
        case node_rm:
            view()->setCursor( TQCursor( TQt::SizeHorCursor ) );
            break;
        case node_mt:
        case node_mb:
            view()->setCursor( TQCursor( TQt::SizeVerCursor ) );
            break;
        default:
            view()->setCursor( TQCursor( TQt::arrowCursor ) );
    }
}
 
void
VSelectTool::mouseButtonPress()
{
    // we are adding to the selection
    m_add = true;
 
    m_current = first();
 
    m_activeNode = view()->part()->document().selection()->handleNode( first() );
    KoRect rect = view()->part()->document().selection()->boundingBox();
 
    if( m_activeNode != node_none )
        m_state = scaling;
    else if( rect.contains( m_current ) && m_state == normal )
        m_state = moving;
 
    recalc();
 
    // undraw selection bounding box
    view()->part()->document().selection()->setState( VObject::edit );
    view()->repaintAll( rect );
    view()->part()->document().selection()->setState( VObject::selected );
 
    draw();
}
 
void
VSelectTool::rightMouseButtonPress()
{
    // we are removing from the selection
    m_add = false;
 
    m_current = first();
 
    recalc();
 
    // undraw selection bounding box
    view()->part()->document().selection()->setState( VObject::edit );
    view()->repaintAll( view()->part()->document().selection()->boundingBox() );
    view()->part()->document().selection()->setState( VObject::selected );
 
    draw();
}
 
void
VSelectTool::mouseDrag()
{
    draw();
 
    recalc();
 
    draw();
}
 
void
VSelectTool::rightMouseButtonRelease()
{
    m_state = normal;
    m_add = true;
 
    if( ctrlPressed() )
    {
        // unselect the topmost object under the mouse cursor
        VObjectList newSelection;
        VSelectObjects selector( newSelection, first() );
        if( selector.visit( view()->part()->document() ) )
            view()->part()->document().selection()->take( *newSelection.last() );
 
        view()->part()->repaintAllViews( view()->part()->document().selection()->boundingBox() );
        view()->selectionChanged();
 
        updateStatusBar();
    }
    else if( view()->part()->document().selection()->objects().count() > 0 )
    {
        view()->showSelectionPopupMenu( TQCursor::pos() );
    }
}
 
void
VSelectTool::mouseButtonRelease()
{
    m_state = normal;
    m_add = true;
 
    // selection of next underlying object
    if( shiftPressed() ) 
    {
        VObjectList newSelection;
        VObjectList oldSelection = view()->part()->document().selection()->objects();
 
        // clear selection if not in multi-slection-mode
        if( ! ctrlPressed() )
            view()->part()->document().selection()->clear();
 
        // get a list of all object under the mouse cursor
        VSelectObjects selector( newSelection, first(), true, true );
        if( selector.visit( view()->part()->document() ) )
        {
            // determine the last selected object of the object stack
            VObject *lastMatched = 0L;
            VObjectListIterator it( newSelection );
            for( ; it.current(); ++it )
            {
                if( oldSelection.contains( it.current() ) )
                    lastMatched = it.current();
            }
            
            // select the next underlying object or the first if:
            // - none is selected
            // - the stack's bottom object was the last selected object
            if( lastMatched && lastMatched != newSelection.first() )
                view()->part()->document().selection()->append( newSelection.at( newSelection.find( lastMatched )-1 ) );
            else
                view()->part()->document().selection()->append( newSelection.last() );
        }
    }
    else    
    {
        // clear selection if not in multi-slection-mode
        if( ! ctrlPressed() )
            view()->part()->document().selection()->clear();
 
        // append the topmost object under the mouse cursor to the selection
        VObjectList newSelection;
        VSelectObjects selector( newSelection, first() );
        if( selector.visit( view()->part()->document() ) )
            view()->part()->document().selection()->append( newSelection.last() );
    }
 
    view()->part()->repaintAllViews( view()->part()->document().selection()->boundingBox() );
    view()->selectionChanged();
 
    updateStatusBar();
}
 
void
VSelectTool::mouseDragRelease()
{
    if( m_state == normal )
    {
        // Y mirroring
        KoPoint fp = first();
        KoPoint lp = last();
        if( ! ctrlPressed() )
            view()->part()->document().selection()->clear();
        
        KoRect selRect = KoRect( fp.x(), fp.y(), lp.x() - fp.x(), lp.y() - fp.y() ).normalize();
        if( m_add )
            view()->part()->document().selection()->append( selRect );
        else
            view()->part()->document().selection()->take( selRect );
        view()->part()->repaintAllViews( selRect );
    }
    else if( m_state == moving )
    {
        m_state = normal;
        recalc();
        if( m_lock )
            view()->part()->addCommand(
                 new VTranslateCmd(
                    &view()->part()->document(),
                    abs( int( m_distx ) ) >= abs( int( m_disty ) ) ? tqRound( m_distx ) : 0,
                    abs( int( m_distx ) ) <= abs( int( m_disty ) ) ? tqRound( m_disty ) : 0, altPressed() ),
                true );
        else
            view()->part()->addCommand(
                new VTranslateCmd( &view()->part()->document(), tqRound( m_distx ), tqRound( m_disty ), altPressed() ),
                true );
    }
    else if( m_state == scaling )
    {
        m_state = normal;
        view()->part()->addCommand(
            new VScaleCmd( &view()->part()->document(), m_sp, m_s1, m_s2, altPressed() ),
            true );
        m_s1 = m_s2 = 1;
    }
 
    view()->selectionChanged();
    m_lock = false;
    updateStatusBar();
}
 
void
VSelectTool::arrowKeyReleased( TQt::Key key )
{
    int dx = 0;
    int dy = 0;
    switch( key )
    {
        case TQt::Key_Up: dy = 10; break;
        case TQt::Key_Down: dy = -10; break;
        case TQt::Key_Right: dx = 10; break;
        case TQt::Key_Left: dx = -10; break;
        default: return;
    }
    m_state = normal;
    view()->part()->addCommand(
        new VTranslateCmd(
            &view()->part()->document(),
            dx, dy ),
        true );
    view()->selectionChanged();
    updateStatusBar();
}
 
bool
VSelectTool::keyReleased( TQt::Key key )
{
    
    VSelection* selection = view()->part()->document().selection();
 
    switch( key )
    {
        // increase/decrease the handle size
        case TQt::Key_I:
        {
            uint handleSize = selection->handleSize();
            if( shiftPressed() ) 
                selection->setHandleSize( ++handleSize );
            else if( handleSize > 1 )
                selection->setHandleSize( --handleSize );
        }
        break;
        default: return false;
    }
 
    if( view() )
        view()->repaintAll( selection->boundingBox() );
 
    return true;
}
 
void
VSelectTool::updateStatusBar() const
{
    if( ! view() ) 
        return;
 
    if( ! view()->part() )
        return;
 
    int objcount = view()->part()->document().selection()->objects().count();
    if( objcount > 0 )
    {
        KoRect rect = view()->part()->document().selection()->boundingBox();
 
        double x = KoUnit::toUserValue( rect.x(), view()->part()->unit() );
        double y = KoUnit::toUserValue( rect.y(), view()->part()->unit() );
        double r = KoUnit::toUserValue( rect.right(), view()->part()->unit() );
        double b = KoUnit::toUserValue( rect.bottom(), view()->part()->unit() );
 
        // print bottom-left (%1,%2), top-right (%3,%4) corner of selection bounding box and document unit (%5)
        TQString selectMessage = i18n( "[(left,bottom), (right,top)] (actual unit)", "Selection [(%1, %2), (%3, %4)] (%5)").arg( x, 0, 'f', 1 ).arg( y, 0, 'f', 1 ).arg( r, 0, 'f', 1 ).arg( b, 0, 'f', 1 ).arg( view()->part()->unitName() );
 
        VSelectionDescription selectionDesc;
        selectionDesc.visit( *view()->part()->document().selection() );
        selectMessage += TQString( "(%1)" ).arg( selectionDesc.description() );
 
        view()->statusMessage()->setText( selectMessage );
    }
    else
        view()->statusMessage()->setText( i18n( "No selection" ) );
}
 
void
VSelectTool::mouseDragCtrlPressed()
{
    m_lock = true;
}
 
void
VSelectTool::mouseDragCtrlReleased()
{
    m_lock = false;
}
 
void
VSelectTool::mouseDragShiftPressed()
{
    draw();
 
    recalc();
 
    draw();
}
 
void
VSelectTool::mouseDragShiftReleased()
{
    draw();
 
    recalc();
 
    draw();
}
 
void
VSelectTool::cancel()
{
    // Erase old object:
    if ( isDragging() )
    {
        draw();
        m_state = normal;
        view()->repaintAll( view()->part()->document().selection()->boundingBox() );
    }
}
 
void
VSelectTool::recalc()
{
    if( m_state == normal )
    {
        m_current = last();
    }
    else
    {
        VTransformCmd* cmd;
        KoPoint _first = view()->canvasWidget()->snapToGrid( first() );
        KoPoint _last = view()->canvasWidget()->snapToGrid( last() );
        KoRect rect = view()->part()->document().selection()->boundingBox();
 
        if( m_state == moving )
        {
            KoPoint p( rect.x() + last().x() - first().x(), rect.bottom() + last().y() - first().y() );
            p = view()->canvasWidget()->snapToGrid( p );
            m_distx = p.x() - rect.x();
            m_disty = p.y() - rect.bottom();
            if( m_lock )
                cmd = new VTranslateCmd( 0L, abs( int( m_distx ) ) >= abs( int( m_disty ) ) ? m_distx : 0,
                                             abs( int( m_distx ) ) <= abs( int( m_disty ) ) ? m_disty : 0 );
            else
                cmd = new VTranslateCmd( 0L, m_distx, m_disty );
        }
        else
        {
            if( m_activeNode == node_lb )
            {
                m_sp = KoPoint( rect.right(), rect.bottom() );
                m_s1 = ( rect.right() - _last.x() ) / double( rect.width() );
                m_s2 = ( rect.bottom() - _last.y() ) / double( rect.height() );
            }
            else if( m_activeNode == node_mb )
            {
                m_sp = KoPoint( ( ( rect.right() + rect.left() ) / 2 ), rect.bottom() );
                m_s1 = 1;
                m_s2 = ( rect.bottom() - _last.y() ) / double( rect.height() );
            }
            else if( m_activeNode == node_rb )
            {
                m_sp = KoPoint( rect.x(), rect.bottom() );
                m_s1 = ( _last.x() - rect.x() ) / double( rect.width() );
                m_s2 = ( rect.bottom() - _last.y() ) / double( rect.height() );
            }
            else if( m_activeNode == node_rm)
            {
                m_sp = KoPoint( rect.x(), ( rect.bottom() + rect.top() )  / 2 );
                m_s1 = ( _last.x() - rect.x() ) / double( rect.width() );
                m_s2 = 1;
            }
            else if( m_activeNode == node_rt )
            {
                m_sp = KoPoint( rect.x(), rect.y() );
                m_s1 = ( _last.x() - rect.x() ) / double( rect.width() );
                m_s2 = ( _last.y() - rect.y() ) / double( rect.height() );
            }
            else if( m_activeNode == node_mt )
            {
                m_sp = KoPoint( ( ( rect.right() + rect.left() ) / 2 ), rect.y() );
                m_s1 = 1;
                m_s2 = ( _last.y() - rect.y() ) / double( rect.height() );
            }
            else if( m_activeNode == node_lt )
            {
                m_sp = KoPoint( rect.right(), rect.y() );
                m_s1 = ( rect.right() - _last.x() ) / double( rect.width() );
                m_s2 = ( _last.y() - rect.y() ) / double( rect.height() );
            }
            else if( m_activeNode == node_lm )
            {
                m_sp = KoPoint( rect.right(), ( rect.bottom() + rect.top() )  / 2 );
                m_s1 = ( rect.right() - _last.x() ) / double( rect.width() );
                m_s2 = 1;
            }
 
            if( shiftPressed() )
                m_s1 = m_s2 = kMax( m_s1, m_s2 );
            cmd = new VScaleCmd( 0L, m_sp, m_s1, m_s2 );
        }
 
        // Copy selected objects and transform:
        m_objects.clear();
        VObject* copy;
 
        VObjectListIterator itr = view()->part()->document().selection()->objects();
        for( ; itr.current() ; ++itr )
        {
            if( itr.current()->state() != VObject::deleted )
            {
                copy = itr.current()->clone();
                copy->setState( VObject::edit );
 
                cmd->visit( *copy );
 
                m_objects.append( copy );
            }
        }
 
        delete( cmd );
    }
}
 
bool
VSelectTool::showDialog() const
{
    return m_optionsWidget->exec() == TQDialog::Accepted;
}
 
void 
VSelectTool::refreshUnit()
{
    updateStatusBar();
}
 
void
VSelectTool::setup( TDEActionCollection *collection )
{
       m_action = static_cast<TDERadioAction *>(collection -> action( name() ) );
 
    if( m_action == 0 )
    {
        m_action = new TDERadioAction( i18n( "Select Tool" ), "14_select", TQt::SHIFT+TQt::Key_H, this, TQ_SLOT( activate() ), collection, name() );
        m_action->setToolTip( i18n( "Select" ) );
        m_action->setExclusiveGroup( "select" );
        //m_ownAction = true;
    }
}
 
#include "vselecttool.moc"