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koffice/karbon/tools/vgradienttool.cpp

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/* 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 <tqcursor.h>
#include <tqlabel.h>
#include <tdelocale.h>
#include <karbon_part.h>
#include <karbon_view.h>
#include <karbon_factory.h>
#include <render/vpainter.h>
#include <render/vpainterfactory.h>
#include "vgradienttool.h"
#include <widgets/vgradienttabwidget.h>
#include <commands/vfillcmd.h>
#include <commands/vstrokecmd.h>
#include <core/vstroke.h>
#include <core/vselection.h>
#include <widgets/vstrokefillpreview.h>
#include <kdebug.h>
VGradientTool::VGradientOptionsWidget::VGradientOptionsWidget( VGradient& gradient )
: KDialogBase( 0L, "", true, i18n( "Edit Gradient" ), Ok | Cancel )
{
m_gradientWidget = new VGradientTabWidget( gradient, KarbonFactory::rServer(), this );
setMainWidget( m_gradientWidget );
setFixedSize( baseSize() );
}
VGradientTool::VGradientTool( KarbonView *view )
: VTool( view, "gradienttool" ), m_state( normal ), m_handleSize( 3 ), m_active( false )
{
setName( "tool_gradient" );
m_optionsWidget = new VGradientOptionsWidget( m_gradient );
registerTool( this );
}
VGradientTool::~VGradientTool()
{
delete m_optionsWidget;
}
void
VGradientTool::activate()
{
m_active = true;
m_state = normal;
view()->statusMessage()->setText( i18n( "Gradient" ) );
view()->setCursor( TQCursor( TQt::crossCursor ) );
VTool::activate();
if( view() )
{
// disable selection handles
view()->part()->document().selection()->showHandle( false );
// connect to the stroke-fill-preview to get notice when the stroke or fill gets selected
VStrokeFillPreview* preview = view()->strokeFillPreview();
if( preview )
{
connect( preview, TQT_SIGNAL( fillSelected() ), this, TQT_SLOT( targetChanged() ) );
connect( preview, TQT_SIGNAL( strokeSelected() ), this, TQT_SLOT( targetChanged() ) );
}
view()->repaintAll( view()->part()->document().selection()->boundingBox() );
}
}
void
VGradientTool::deactivate()
{
m_active = false;
if( view() )
{
// enable selection handles
view()->part()->document().selection()->showHandle( true );
VStrokeFillPreview* preview = view()->strokeFillPreview();
if( preview )
{
disconnect( preview, TQT_SIGNAL( fillSelected() ), this, TQT_SLOT( targetChanged() ) );
disconnect( preview, TQT_SIGNAL( strokeSelected() ), this, TQT_SLOT( targetChanged() ) );
}
view()->repaintAll( view()->part()->document().selection()->boundingBox() );
}
}
TQString
VGradientTool::statusText()
{
return i18n( "Gradient Tool" );
}
TQString
VGradientTool::contextHelp()
{
TQString s = i18n( "<qt><b>Gradient tool:</b><br>" );
s += i18n( "<i>Click and drag</i> to choose the gradient vector.<br>" );
s += i18n( "<i>Click and drag</i> a gradient vector handle to change the gradient vector.<br>" );
s += i18n( "<i>Shift click and drag</i> to move the radial gradient focal point.<br>" );
s += i18n( "<i>Press i or Shift+i</i> to decrease or increase the handle size.<br>" );
s += i18n( "<br><b>Gradient editing:</b><br>" );
s += i18n( "<i>Click and drag</i> to move points.<br>" );
s += i18n( "<i>Double click</i> on a color point to edit it.<br>" );
s += i18n( "<i>Right click</i> on a color point to remove it.</qt>" );
return s;
}
bool
VGradientTool::getGradient( VGradient &gradient )
{
if( ! view() )
return false;
// determine if stroke of fill is selected for editing
VStrokeFillPreview *preview = view()->strokeFillPreview();
bool strokeSelected = ( preview && preview->strokeIsSelected() );
VSelection* selection = view()->part()->document().selection();
if( selection->objects().count() != 1 )
return false;
VObject *obj = selection->objects().getFirst();
// get the gradient of the first selected object, if any
if( strokeSelected && obj->stroke()->type() == VStroke::grad )
gradient = obj->stroke()->gradient();
else if( ! strokeSelected && obj->fill()->type() == VFill::grad )
gradient = obj->fill()->gradient();
else
return false;
return true;
}
bool
VGradientTool::getOpacity( double &opacity )
{
if( ! view() )
return false;
// determine if stroke of fill is selected for editing
VStrokeFillPreview *preview = view()->strokeFillPreview();
bool strokeSelected = ( preview && preview->strokeIsSelected() );
VSelection* selection = view()->part()->document().selection();
if( selection->objects().count() != 1 )
return false;
VObject *obj = selection->objects().getFirst();
// get the opacity of the first selected object, if any
if( strokeSelected && obj->stroke()->type() == VStroke::grad )
opacity = obj->stroke()->color().opacity();
else if( ! strokeSelected && obj->fill()->type() == VFill::grad )
opacity = obj->fill()->color().opacity();
else return false;
return true;
}
void
VGradientTool::draw( VPainter* painter )
{
if( ! m_active )
return;
if( m_state != normal )
return;
if( ! getGradient( m_gradient ) )
return;
KoPoint s = m_gradient.origin();
KoPoint e = m_gradient.vector();
KoPoint f = m_gradient.focalPoint();
// save the handle rects for later inside testing
m_origin = KoRect( s.x()-m_handleSize, s.y()-m_handleSize, 2*m_handleSize, 2*m_handleSize );
m_vector = KoRect( e.x()-m_handleSize, e.y()-m_handleSize, 2*m_handleSize, 2*m_handleSize );
m_center = KoRect( f.x()-m_handleSize, f.y()-m_handleSize, 2*m_handleSize, 2*m_handleSize );
painter->setPen( TQt::blue.light() );
painter->setBrush( TQt::blue.light() );
painter->setRasterOp( TQt::XorROP );
// draw the gradient vector
painter->newPath();
painter->moveTo( s );
painter->lineTo( e );
painter->strokePath();
if( m_gradient.type() == VGradient::radial )
{
// draw the focal point cross
double size = (double)m_handleSize / view()->zoom();
KoPoint focal = m_center.center();
KoRect cross = KoRect( focal.x()-3*size, focal.y()-3*size, 6*size, 6*size );
painter->newPath();
painter->moveTo( cross.topLeft() );
painter->lineTo( cross.bottomRight() );
painter->strokePath();
painter->newPath();
painter->moveTo( cross.bottomLeft() );
painter->lineTo( cross.topRight() );
painter->strokePath();
}
// draw the handle rects
painter->drawNode( m_origin.center(), m_handleSize );
painter->drawNode( m_vector.center(), m_handleSize );
}
void
VGradientTool::draw()
{
if( ! view() || view()->part()->document().selection()->objects().count() == 0 )
return;
VPainter *painter = view()->painterFactory()->editpainter();
painter->setRasterOp( TQt::NotROP );
painter->setPen( TQt::DotLine );
painter->newPath();
// differentiate between moving a handle and creating a complete new vector
if( m_state == moveOrigin || m_state == moveVector )
{
painter->moveTo( m_fixed );
painter->lineTo( m_current );
// draw the handle rects
painter->drawNode( m_fixed, m_handleSize );
painter->drawNode( m_current, m_handleSize );
}
else if( m_state == createNew )
{
painter->moveTo( first() );
painter->lineTo( m_current );
// draw the handle rects
painter->drawNode( first(), m_handleSize );
painter->drawNode( m_current, m_handleSize );
}
else if( m_state == moveCenter )
{
// draw the focal point cross
double size = (double)m_handleSize / view()->zoom();
KoRect cross = KoRect( m_current.x()-3*size, m_current.y()-3*size, 6*size, 6*size );
painter->moveTo( cross.topLeft() );
painter->lineTo( cross.bottomRight() );
painter->strokePath();
painter->newPath();
painter->moveTo( cross.bottomLeft() );
painter->lineTo( cross.topRight() );
}
painter->strokePath();
}
void
VGradientTool::mouseDrag()
{
if( m_state == normal )
return;
// undo old line
draw();
m_current = last();
draw();
}
void
VGradientTool::mouseButtonPress()
{
m_current = first();
// set the apropriate editing state
if( m_center.contains( m_current ) && shiftPressed())
{
m_state = moveCenter;
}
else if( m_origin.contains( m_current ) )
{
m_state = moveOrigin;
m_fixed = m_vector.center();
}
else if( m_vector.contains( m_current ) )
{
m_state = moveVector;
m_fixed = m_origin.center();
}
else
m_state = createNew;
}
void
VGradientTool::mouseButtonRelease()
{
m_state = normal;
if( ! view() || view()->part()->document().selection()->objects().count() == 0 )
return;
// save old gradient position
VGradient oldGradient = m_gradient;
bool strokeSelected = false;
// determine the target from the stroke-fill-preview-widget
VStrokeFillPreview* preview = view()->strokeFillPreview();
if( preview && preview->strokeIsSelected() )
strokeSelected = true;
if( first() == last() )
{
m_optionsWidget->gradientWidget()->setGradient( m_gradient );
if( strokeSelected )
{
m_optionsWidget->gradientWidget()->setTarget( VGradientTabWidget::STROKE );
m_optionsWidget->gradientWidget()->setOpacity( 1.0 );
}
else
{
m_optionsWidget->gradientWidget()->setTarget( VGradientTabWidget::FILL );
double opacity;
if( getOpacity( opacity ) )
m_optionsWidget->gradientWidget()->setOpacity( opacity );
}
if( ! showDialog() )
return;
m_gradient = m_optionsWidget->gradientWidget()->gradient();
// if the gradient dialog was shown and accepted, determine the target from the dialog
strokeSelected = ( m_optionsWidget->gradientWidget()->target() == VGradientTabWidget::STROKE );
}
// calculate a sane intial position for the new gradient
if( view()->part()->document().selection()->objects().count() == 1 )
{
VObject *obj = view()->part()->document().selection()->objects().getFirst();
if( ( ! strokeSelected && obj->fill()->type() != VFill::grad )
|| ( strokeSelected && obj->stroke()->type() != VStroke::grad ) )
{
KoRect bbox = obj->boundingBox();
switch( m_gradient.type() )
{
case VGradient::linear:
oldGradient.setOrigin( bbox.bottomLeft() + 0.5*(bbox.bottomRight()-bbox.bottomLeft()) );
oldGradient.setVector( bbox.topLeft() + 0.5*(bbox.topRight()-bbox.topLeft()) );
oldGradient.setFocalPoint( bbox.center() );
break;
case VGradient::radial:
oldGradient.setOrigin( bbox.center() );
oldGradient.setVector( bbox.topLeft() + 0.5*(bbox.topRight()-bbox.topLeft()) );
oldGradient.setFocalPoint( bbox.center() );
break;
case VGradient::conic:
oldGradient.setOrigin( bbox.center() );
oldGradient.setVector( bbox.topLeft() + 0.5*(bbox.topRight()-bbox.topLeft()) );
oldGradient.setFocalPoint( bbox.center() );
break;
}
}
}
// workaround for a libart 2.3.10 bug
if( oldGradient.origin() == oldGradient.vector() )
oldGradient.vector().rx()+=1;
// use the old gradient position
m_gradient.setVector( oldGradient.vector() );
m_gradient.setOrigin( oldGradient.origin() );
m_gradient.setFocalPoint( oldGradient.focalPoint() );
if( ! strokeSelected )
{
VFill fill;
fill.gradient() = m_gradient;
fill.setType( VFill::grad );
VColor c = fill.color();
c.setOpacity( m_optionsWidget->gradientWidget()->opacity() );
fill.setColor( c, false );
view()->part()->addCommand(
new VFillCmd( &view()->part()->document(), fill, "14_gradient" ), true );
}
else
{
view()->part()->addCommand(
new VStrokeCmd( &view()->part()->document(), &m_gradient ), true );
}
}
void
VGradientTool::mouseDragRelease()
{
if( ! view() || m_state == normal )
return;
if( view()->part()->document().selection()->objects().count() == 0 )
{
draw();
return;
}
if( m_state == moveOrigin )
m_gradient.setOrigin( last() );
else if( m_state == moveVector )
m_gradient.setVector( last() );
else if( m_state == moveCenter )
m_gradient.setFocalPoint( last() );
else if( m_state == createNew )
{
m_gradient.setOrigin( first() );
m_gradient.setFocalPoint( first() );
m_gradient.setVector( last() );
}
m_state = normal;
VStrokeFillPreview* preview = view()->strokeFillPreview();
if( ! preview )
return;
if( ! preview->strokeIsSelected() )
{
VFill fill;
fill.gradient() = m_gradient;
fill.setType( VFill::grad );
VColor c = fill.color();
c.setOpacity( m_optionsWidget->gradientWidget()->opacity() );
fill.setColor( c, false );
view()->part()->addCommand(
new VFillCmd( &view()->part()->document(), fill, "14_gradient" ), true );
}
else
view()->part()->addCommand(
new VStrokeCmd( &view()->part()->document(), &m_gradient ), true );
}
void
VGradientTool::cancel()
{
// Erase old object:
if( isDragging() )
draw();
m_state = normal;
}
bool
VGradientTool::showDialog() const
{
return m_optionsWidget->exec() == TQDialog::Accepted;
}
void
VGradientTool::setup( TDEActionCollection *collection )
{
m_action = static_cast<TDERadioAction *>(collection -> action( name() ) );
if( m_action == 0 )
{
m_action = new TDERadioAction( i18n( "Gradient Tool" ), "14_gradient", TQt::Key_G, this, TQT_SLOT( activate() ), collection, name() );
m_action->setToolTip( i18n( "Gradient" ) );
m_action->setExclusiveGroup( "misc" );
//m_ownAction = true;
}
}
void
VGradientTool::setCursor() const
{
if( !view() ) return;
// set a different cursor if mouse is inside the handle rects
if( m_origin.contains( last() ) || m_vector.contains( last() ) || m_center.contains( last() ) )
view()->setCursor( TQCursor( TQt::SizeAllCursor ) );
else
view()->setCursor( TQCursor( TQt::arrowCursor ) );
}
bool
VGradientTool::keyReleased( TQt::Key key )
{
// increase/decrease the handle size
switch( key )
{
case TQt::Key_I:
if( shiftPressed() )
m_handleSize++;
else if( m_handleSize > 3 )
m_handleSize--;
break;
default: return false;
}
if( view() )
view()->repaintAll( view()->part()->document().selection()->boundingBox() );
return true;
}
void
VGradientTool::targetChanged()
{
if( view() )
view()->repaintAll( view()->part()->document().selection()->boundingBox() );
}
#include "vgradienttool.moc"