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Diffstat (limited to 'karbon/tools/vgradienttool.cc')
| -rw-r--r-- | karbon/tools/vgradienttool.cc | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/karbon/tools/vgradienttool.cc b/karbon/tools/vgradienttool.cc new file mode 100644 index 00000000..dbd82720 --- /dev/null +++ b/karbon/tools/vgradienttool.cc @@ -0,0 +1,526 @@ +/* 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 <qcursor.h> +#include <qlabel.h> + +#include <klocale.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( QCursor( Qt::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, SIGNAL( fillSelected() ), this, SLOT( targetChanged() ) ); + connect( preview, SIGNAL( strokeSelected() ), this, 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, SIGNAL( fillSelected() ), this, SLOT( targetChanged() ) ); + disconnect( preview, SIGNAL( strokeSelected() ), this, SLOT( targetChanged() ) ); + } + view()->repaintAll( view()->part()->document().selection()->boundingBox() ); + } +} + +QString +VGradientTool::statusText() +{ + return i18n( "Gradient Tool" ); +} + +QString +VGradientTool::contextHelp() +{ + QString 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( Qt::blue.light() ); + painter->setBrush( Qt::blue.light() ); + painter->setRasterOp( Qt::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( Qt::NotROP ); + + painter->setPen( Qt::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() == QDialog::Accepted; +} + +void +VGradientTool::setup( KActionCollection *collection ) +{ + m_action = static_cast<KRadioAction *>(collection -> action( name() ) ); + + if( m_action == 0 ) + { + m_action = new KRadioAction( i18n( "Gradient Tool" ), "14_gradient", Qt::Key_G, this, 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( QCursor( Qt::SizeAllCursor ) ); + else + view()->setCursor( QCursor( Qt::arrowCursor ) ); +} + +bool +VGradientTool::keyReleased( Qt::Key key ) +{ + // increase/decrease the handle size + switch( key ) + { + case Qt::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" |