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Diffstat (limited to 'src/drawparts/dpline.cpp')
| -rw-r--r-- | src/drawparts/dpline.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/src/drawparts/dpline.cpp b/src/drawparts/dpline.cpp new file mode 100644 index 0000000..59fa789 --- /dev/null +++ b/src/drawparts/dpline.cpp @@ -0,0 +1,227 @@ +/*************************************************************************** + * Copyright (C) 2005 by David Saxton * + * david@bluehaze.org * + * * + * 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. * + ***************************************************************************/ + +#include "dpline.h" +#include "libraryitem.h" +#include "resizeoverlay.h" +#include "variant.h" + +#include <cmath> +#include <kiconloader.h> +#include <klocale.h> +#include <qpainter.h> + + +//BEGIN class DPLine +Item* DPLine::construct( ItemDocument *itemDocument, bool newItem, const char *id ) +{ + return new DPLine( itemDocument, newItem, id ); +} + +LibraryItem* DPLine::libraryItem() +{ + return new LibraryItem( + QString("dp/line"), + i18n("Line"), + i18n("Other"), + KGlobal::iconLoader()->loadIcon( "text", KIcon::Small ), + LibraryItem::lit_drawpart, + DPLine::construct ); +} + +DPLine::DPLine( ItemDocument *itemDocument, bool newItem, const char *id ) + : DrawPart( itemDocument, newItem, id ? id : "line" ) +{ + m_pLineOverlay = new LineOverlay(this); + m_name = i18n("Line"); + m_desc = i18n("Select the line to position the end points"); + + createProperty( "line-color", Variant::Type::Color ); + property("line-color")->setCaption( i18n("Line Color") ); + property("line-color")->setValue(Qt::black); + + createProperty( "line-width", Variant::Type::Int ); + property("line-width")->setCaption( i18n("Line Width") ); + property("line-width")->setMinValue(1); + property("line-width")->setMaxValue(1000); + property("line-width")->setValue(1); + + createProperty( "line-style", Variant::Type::PenStyle ); + property("line-style")->setCaption( i18n("Line Style") ); + property("line-style")->setAdvanced(true); + setDataPenStyle( "line-style", Qt::SolidLine ); + + createProperty( "cap-style", Variant::Type::PenCapStyle ); + property("cap-style")->setCaption( i18n("Cap Style") ); + property("cap-style")->setAdvanced(true); + setDataPenCapStyle( "cap-style", Qt::FlatCap ); +} + +DPLine::~DPLine() +{ +} + +void DPLine::setSelected( bool yes ) +{ + if ( yes == isSelected() ) + return; + + DrawPart::setSelected(yes); + m_pLineOverlay->showResizeHandles(yes); +} + + +void DPLine::dataChanged() +{ + setPen( QPen( dataColor("line-color"), + unsigned( dataInt("line-width") ), + getDataPenStyle("line-style"), + getDataPenCapStyle("cap-style"), + Qt::MiterJoin ) ); + + postResize(); // in case the pen width has changed + update(); +} + + +void DPLine::postResize() +{ + int x1 = offsetX(); + int y1 = offsetY(); + int x2 = x1+width(); + int y2 = y1+height(); + + QPointArray p(4); + int pw = pen().width(); + int dx = QABS(x1-x2); + int dy = QABS(y1-y2); + pw = pw*4/3+2; // approx pw*sqrt(2) + int px = x1<x2 ? -pw : pw ; + int py = y1<y2 ? -pw : pw ; + if ( dx && dy && (dx > dy ? (dx*2/dy <= 2) : (dy*2/dx <= 2)) ) { + // steep + if ( px == py ) { + p[0] = QPoint(x1 ,y1+py); + p[1] = QPoint(x2-px,y2 ); + p[2] = QPoint(x2 ,y2-py); + p[3] = QPoint(x1+px,y1 ); + } else { + p[0] = QPoint(x1+px,y1 ); + p[1] = QPoint(x2 ,y2-py); + p[2] = QPoint(x2-px,y2 ); + p[3] = QPoint(x1 ,y1+py); + } + } else if ( dx > dy ) { + // horizontal + p[0] = QPoint(x1+px,y1+py); + p[1] = QPoint(x2-px,y2+py); + p[2] = QPoint(x2-px,y2-py); + p[3] = QPoint(x1+px,y1-py); + } else { + // vertical + p[0] = QPoint(x1+px,y1+py); + p[1] = QPoint(x2+px,y2-py); + p[2] = QPoint(x2-px,y2-py); + p[3] = QPoint(x1-px,y1+py); + } + setItemPoints( p, false ); +} + + +void DPLine::drawShape( QPainter & p ) +{ + int x1 = int(x()+offsetX()); + int y1 = int(y()+offsetY()); + int x2 = x1+width(); + int y2 = y1+height(); + + p.drawLine( x1, y1, x2, y2 ); +} +//END class DPLine + + +//BEGIN class DPArrow +Item* DPArrow::construct( ItemDocument *itemDocument, bool newItem, const char *id ) +{ + return new DPArrow( itemDocument, newItem, id ); +} + +LibraryItem* DPArrow::libraryItem() +{ + return new LibraryItem( + QString("dp/arrow"), + i18n("Arrow"), + i18n("Other"), + KGlobal::iconLoader()->loadIcon( "text", KIcon::Small ), + LibraryItem::lit_drawpart, + DPArrow::construct ); +} + +DPArrow::DPArrow( ItemDocument *itemDocument, bool newItem, const char *id ) + : DPLine( itemDocument, newItem, id ? id : "arrow" ) +{ + m_name = i18n("Arrow"); + + // We don't want to use the square cap style as it screws up drawing our arrow head + QStringList allowed = property("cap-style")->allowed(); + allowed.remove( DrawPart::penCapStyleToName( Qt::SquareCap ) ); + property("cap-style")->setAllowed(allowed); +} + +DPArrow::~DPArrow() +{ +} + + +void DPArrow::drawShape( QPainter & p ) +{ + int x1 = int(x()+offsetX()); + int y1 = int(y()+offsetY()); + int x2 = x1+width(); + int y2 = y1+height(); + + p.drawLine( x1, y1, x2, y2 ); + + double dx = x2-x1; + double dy = y2-y1; + + if ( dx == 0. && dy == 0. ) + return; + + double pi = 3.14159265358979323846264; + double arrow_angle = ( dx == 0 ? (dy>0?(pi/2.):(-pi/2.)) : std::atan(dy/dx) ); + if ( dx < 0 ) + arrow_angle += pi; + + double head_angle = 0.6; // Angle of arrowhead + double head_length = 10.; + + // Position of arrowhead + int x3 = int( x2 + head_length*std::cos( pi + arrow_angle - head_angle ) ); + int y3 = int( y2 + head_length*std::sin( pi + arrow_angle - head_angle ) ); + int x4 = int( x2 + head_length*std::cos( pi + arrow_angle + head_angle ) ); + int y4 = int( y2 + head_length*std::sin( pi + arrow_angle + head_angle ) ); + + // Draw arrowhead + QPen pen = p.pen(); + pen.setCapStyle( Qt::RoundCap ); + p.setPen(pen); + p.setBrush(pen.color()); + QPointArray pa(3); + pa[0] = QPoint( x2, y2 ); + pa[1] = QPoint( x3, y3 ); + pa[2] = QPoint( x4, y4 ); + p.drawPolygon(pa); + p.drawPolyline(pa); +// p.drawLine( x2, y2, x3, y3 ); +// p.drawLine( x2, y2, x4, y4 ); +} +//END class DPLine + |