nodeeditor/src/ConnectionPainter.cpp at exmix-master · DigitalPulseSoftware/nodeeditor · GitHub

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#include "ConnectionPainter.hpp"

#include <QtGui/QIcon>

#include "ConnectionGeometry.hpp"

#include "ConnectionState.hpp"

#include "ConnectionGraphicsObject.hpp"

#include "Connection.hpp"

#include "NodeData.hpp"

#include "StyleCollection.hpp"

using QtNodes::ConnectionPainter;

using QtNodes::ConnectionGeometry;

using QtNodes::Connection;

static

QPainterPath

cubicPath(ConnectionGeometry const& geom)

{

QPointF const& source = geom.source();

QPointF const& sink = geom.sink();

auto c1c2 = geom.pointsC1C2();

// cubic spline

QPainterPath cubic(source);

cubic.cubicTo(c1c2.first, c1c2.second, sink);

return cubic;

}

QPainterPath

ConnectionPainter::

getPainterStroke(ConnectionGeometry const& geom)

{

auto cubic = cubicPath(geom);

QPointF const& source = geom.source();

QPainterPath result(source);

unsigned segments = 20;

for (auto i = 0ul; i < segments; ++i)

{

double ratio = double(i + 1) / segments;

result.lineTo(cubic.pointAtPercent(ratio));

}

QPainterPathStroker stroker; stroker.setWidth(10.0);

return stroker.createStroke(result);

}

#ifdef NODE_DEBUG_DRAWING

static

void

debugDrawing(QPainter * painter,

Connection const & connection)

{

Q_UNUSED(painter);

Q_UNUSED(connection);

ConnectionGeometry const& geom =

connection.connectionGeometry();

{

QPointF const& source = geom.source();

QPointF const& sink = geom.sink();

auto points = geom.pointsC1C2();

painter->setPen(Qt::red);

painter->setBrush(Qt::red);

painter->drawLine(QLineF(source, points.first));

painter->drawLine(QLineF(points.first, points.second));

painter->drawLine(QLineF(points.second, sink));

painter->drawEllipse(points.first, 3, 3);

painter->drawEllipse(points.second, 3, 3);

painter->setBrush(Qt::NoBrush);

painter->drawPath(cubicPath(geom));

}

{

painter->setPen(Qt::yellow);

painter->drawRect(geom.boundingRect());

}

#endif

static

void

drawSketchLine(QPainter * painter,

Connection const & connection)

{

using QtNodes::ConnectionState;

ConnectionState const& state =

connection.connectionState();

if (state.requiresPort())

{

auto const & connectionStyle =

QtNodes::StyleCollection::connectionStyle();

QPen p;

p.setWidth(connectionStyle.constructionLineWidth());

p.setColor(connectionStyle.constructionColor());

p.setStyle(Qt::DashLine);

painter->setPen(p);

painter->setBrush(Qt::NoBrush);

using QtNodes::ConnectionGeometry;

ConnectionGeometry const& geom = connection.connectionGeometry();

auto cubic = cubicPath(geom);

// cubic spline

painter->drawPath(cubic);

}

static

void

drawHoveredOrSelected(QPainter * painter,

Connection const & connection)

{

using QtNodes::ConnectionGeometry;

ConnectionGeometry const& geom = connection.connectionGeometry();

bool const hovered = geom.hovered();

auto const& graphicsObject =

connection.getConnectionGraphicsObject();

bool const selected = graphicsObject.isSelected();

// drawn as a fat background

if (hovered || selected)

{

QPen p;

auto const &connectionStyle =

QtNodes::StyleCollection::connectionStyle();

double const lineWidth = connectionStyle.lineWidth();

p.setWidth(2 * lineWidth);

p.setColor(selected ?

connectionStyle.selectedHaloColor() :

connectionStyle.hoveredColor());

painter->setPen(p);

painter->setBrush(Qt::NoBrush);

// cubic spline

auto cubic = cubicPath(geom);

painter->drawPath(cubic);

}

static

void

drawNormalLine(QPainter * painter,

Connection const & connection)

{

using QtNodes::ConnectionState;

ConnectionState const& state =

connection.connectionState();

if (state.requiresPort())

return;

// colors

auto const &connectionStyle =

QtNodes::StyleCollection::connectionStyle();

QColor normalColorOut = connectionStyle.normalColor();

QColor normalColorIn = connectionStyle.normalColor();

QColor selectedColor = connectionStyle.selectedColor();

bool gradientColor = false;

if (connectionStyle.useDataDefinedColors())

{

using QtNodes::PortType;

auto dataTypeOut = connection.dataType(PortType::Out);

auto dataTypeIn = connection.dataType(PortType::In);

gradientColor = (dataTypeOut.id != dataTypeIn.id);

normalColorOut = connectionStyle.normalColor(dataTypeOut.id);

normalColorIn = connectionStyle.normalColor(dataTypeIn.id);

selectedColor = normalColorOut.darker(200);

}

// geometry

ConnectionGeometry const& geom = connection.connectionGeometry();

double const lineWidth = connectionStyle.lineWidth();

// draw normal line

QPen p;

p.setWidth(lineWidth);

auto const& graphicsObject = connection.getConnectionGraphicsObject();

bool const selected = graphicsObject.isSelected();

auto cubic = cubicPath(geom);

if (gradientColor)

{

painter->setBrush(Qt::NoBrush);

QColor c = normalColorOut;

if (selected)

c = c.darker(200);

p.setColor(c);

painter->setPen(p);

unsigned int const segments = 60;

for (unsigned int i = 0ul; i < segments; ++i)

{

double ratioPrev = double(i) / segments;

double ratio = double(i + 1) / segments;

if (i == segments / 2)

{

QColor c = normalColorIn;

if (selected)

c = c.darker(200);

p.setColor(c);

painter->setPen(p);

}

painter->drawLine(cubic.pointAtPercent(ratioPrev),

cubic.pointAtPercent(ratio));

}

{

QIcon icon(":convert.png");

QPixmap pixmap = icon.pixmap(QSize(22, 22));

painter->drawPixmap(cubic.pointAtPercent(0.50) - QPoint(pixmap.width()/2,

pixmap.height()/2),

pixmap);

}

else

{

p.setColor(normalColorOut);

if (selected)

{

p.setColor(selectedColor);

}

painter->setPen(p);

painter->setBrush(Qt::NoBrush);

painter->drawPath(cubic);

}

void

ConnectionPainter::

paint(QPainter* painter,

Connection const &connection)

{

drawHoveredOrSelected(painter, connection);

drawSketchLine(painter, connection);

drawNormalLine(painter, connection);

#ifdef NODE_DEBUG_DRAWING

debugDrawing(painter, connection);

#endif

// draw end points

ConnectionGeometry const& geom = connection.connectionGeometry();

QPointF const & source = geom.source();

QPointF const & sink = geom.sink();

auto const & connectionStyle =

QtNodes::StyleCollection::connectionStyle();

double const pointDiameter = connectionStyle.pointDiameter();

painter->setPen(connectionStyle.constructionColor());

painter->setBrush(connectionStyle.constructionColor());

double const pointRadius = pointDiameter / 2.0;

painter->drawEllipse(source, pointRadius, pointRadius);

painter->drawEllipse(sink, pointRadius, pointRadius);

}

nodeeditor/src/ConnectionPainter.cpp at exmix-master · DigitalPulseSoftware/nodeeditor · GitHub

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