#include "NodePainter.hpp"
#include
#include
#include "StyleCollection.hpp"
#include "PortType.hpp"
#include "NodeGraphicsObject.hpp"
#include "NodeGeometry.hpp"
#include "NodeState.hpp"
#include "NodeDataModel.hpp"
#include "Node.hpp"
#include "FlowScene.hpp"
using QtNodes::NodePainter;
using QtNodes::NodeGeometry;
using QtNodes::NodeGraphicsObject;
using QtNodes::Node;
using QtNodes::NodeState;
using QtNodes::NodeDataModel;
using QtNodes::FlowScene;
void
NodePainter::
paint(QPainter* painter,
Node & node,
FlowScene const& scene)
{
NodeGeometry const& geom = node.nodeGeometry();
NodeState const& state = node.nodeState();
NodeGraphicsObject const & graphicsObject = node.nodeGraphicsObject();
geom.recalculateSize(painter->font());
//--------------------------------------------
NodeDataModel const * model = node.nodeDataModel();
drawNodeRect(painter, geom, model, graphicsObject);
drawConnectionPoints(painter, geom, state, model, scene);
drawFilledConnectionPoints(painter, geom, state, model);
drawModelName(painter, geom, state, model);
drawEntryLabels(painter, geom, state, model);
drawResizeRect(painter, geom, model);
drawValidationRect(painter, geom, model, graphicsObject);
/// call custom painter
if (auto painterDelegate = model->painterDelegate())
{
painterDelegate->paint(painter, geom, model);
}
}
void
NodePainter::
drawNodeRect(QPainter* painter,
NodeGeometry const& geom,
NodeDataModel const* model,
NodeGraphicsObject const & graphicsObject)
{
NodeStyle const& nodeStyle = model->nodeStyle();
auto color = graphicsObject.isSelected()
? nodeStyle.SelectedBoundaryColor
: nodeStyle.NormalBoundaryColor;
if (geom.hovered())
{
QPen p(color, nodeStyle.HoveredPenWidth);
painter->setPen(p);
}
else
{
QPen p(color, nodeStyle.PenWidth);
painter->setPen(p);
}
QLinearGradient gradient(QPointF(0.0, 0.0),
QPointF(2.0, geom.height()));
gradient.setColorAt(0.0, nodeStyle.GradientColor0);
gradient.setColorAt(0.03, nodeStyle.GradientColor1);
gradient.setColorAt(0.97, nodeStyle.GradientColor2);
gradient.setColorAt(1.0, nodeStyle.GradientColor3);
painter->setBrush(gradient);
float diam = nodeStyle.ConnectionPointDiameter;
QRectF boundary( -diam, -diam, 2.0 * diam + geom.width(), 2.0 * diam + geom.height());
double const radius = 3.0;
painter->drawRoundedRect(boundary, radius, radius);
}
void
NodePainter::
drawConnectionPoints(QPainter* painter,
NodeGeometry const& geom,
NodeState const& state,
NodeDataModel const * model,
FlowScene const & scene)
{
NodeStyle const& nodeStyle = model->nodeStyle();
auto const &connectionStyle = StyleCollection::connectionStyle();
float diameter = nodeStyle.ConnectionPointDiameter;
auto reducedDiameter = diameter * 0.6;
for(PortType portType: {PortType::Out, PortType::In})
{
size_t n = state.getEntries(portType).size();
for (unsigned int i = 0; i < n; ++i)
{
QPointF p = geom.portScenePosition(i, portType);
auto const & dataType =
model->dataType(portType, static_cast(i));
bool canConnect = (state.getEntries(portType)[i].empty() ||
(portType == PortType::Out &&
model->portOutConnectionPolicy(i) == NodeDataModel::ConnectionPolicy::Many) );
double r = 1.0;
if (state.isReacting() &&
canConnect &&
portType == state.reactingPortType())
{
auto diff = geom.draggingPos() - p;
double dist = std::sqrt(QPointF::dotProduct(diff, diff));
bool typeConvertable = false;
{
if (portType == PortType::In)
{
typeConvertable = scene.registry().getTypeConverter(state.reactingDataType(), dataType) != nullptr;
}
else
{
typeConvertable = scene.registry().getTypeConverter(dataType, state.reactingDataType()) != nullptr;
}
}
if (state.reactingDataType().id == dataType.id || typeConvertable)
{
double const thres = 40.0;
r = (dist < thres) ?
(2.0 - dist / thres ) :
1.0;
}
else
{
double const thres = 80.0;
r = (dist < thres) ?
(dist / thres) :
1.0;
}
}
if (connectionStyle.useDataDefinedColors())
{
painter->setBrush(connectionStyle.normalColor(dataType.id));
}
else
{
painter->setBrush(nodeStyle.ConnectionPointColor);
}
painter->drawEllipse(p,
reducedDiameter * r,
reducedDiameter * r);
}
};
}
void
NodePainter::
drawFilledConnectionPoints(QPainter * painter,
NodeGeometry const & geom,
NodeState const & state,
NodeDataModel const * model)
{
NodeStyle const& nodeStyle = model->nodeStyle();
auto const & connectionStyle = StyleCollection::connectionStyle();
auto diameter = nodeStyle.ConnectionPointDiameter;
for(PortType portType: {PortType::Out, PortType::In})
{
size_t n = state.getEntries(portType).size();
for (size_t i = 0; i < n; ++i)
{
QPointF p = geom.portScenePosition(
static_cast(i),
static_cast(portType));
if (!state.getEntries(portType)[i].empty())
{
auto const & dataType =
model->dataType(portType, static_cast(i));
if (connectionStyle.useDataDefinedColors())
{
QColor const c = connectionStyle.normalColor(dataType.id);
painter->setPen(c);
painter->setBrush(c);
}
else
{
painter->setPen(nodeStyle.FilledConnectionPointColor);
painter->setBrush(nodeStyle.FilledConnectionPointColor);
}
painter->drawEllipse(p,
diameter * 0.4,
diameter * 0.4);
}
}
}
}
void
NodePainter::
drawModelName(QPainter * painter,
NodeGeometry const & geom,
NodeState const & state,
NodeDataModel const * model)
{
NodeStyle const& nodeStyle = model->nodeStyle();
Q_UNUSED(state);
if (!model->captionVisible())
return;
QString const &name = model->caption();
QFont f = painter->font();
f.setBold(true);
QFontMetrics metrics(f);
auto rect = metrics.boundingRect(name);
QPointF position((geom.width() - rect.width()) / 2.0,
(geom.spacing() + geom.entryHeight()) / 3.0);
painter->setFont(f);
painter->setPen(nodeStyle.FontColor);
painter->drawText(position, name);
f.setBold(false);
painter->setFont(f);
}
void
NodePainter::
drawEntryLabels(QPainter * painter,
NodeGeometry const & geom,
NodeState const & state,
NodeDataModel const * model)
{
QFontMetrics const & metrics =
painter->fontMetrics();
for(PortType portType: {PortType::Out, PortType::In})
{
auto const &nodeStyle = model->nodeStyle();
auto& entries = state.getEntries(portType);
size_t n = entries.size();
for (size_t i = 0; i < n; ++i)
{
QPointF p = geom.portScenePosition(static_cast(i), portType);
if (entries[i].empty())
painter->setPen(nodeStyle.FontColorFaded);
else
painter->setPen(nodeStyle.FontColor);
QString s;
if (model->portCaptionVisible(portType, static_cast(i)))
{
s = model->portCaption(portType, static_cast(i));
}
else
{
s = model->dataType(portType, static_cast(i)).name;
}
auto rect = metrics.boundingRect(s);
p.setY(p.y() + rect.height() / 4.0);
switch (portType)
{
case PortType::In:
p.setX(5.0);
break;
case PortType::Out:
p.setX(geom.width() - 5.0 - rect.width());
break;
default:
break;
}
painter->drawText(p, s);
}
}
}
void
NodePainter::
drawResizeRect(QPainter * painter,
NodeGeometry const & geom,
NodeDataModel const * model)
{
if (model->resizable())
{
painter->setBrush(Qt::gray);
painter->drawEllipse(geom.resizeRect());
}
}
void
NodePainter::
drawValidationRect(QPainter * painter,
NodeGeometry const & geom,
NodeDataModel const * model,
NodeGraphicsObject const & graphicsObject)
{
auto modelValidationState = model->validationState();
if (modelValidationState != NodeValidationState::Valid)
{
NodeStyle const& nodeStyle = model->nodeStyle();
auto color = graphicsObject.isSelected()
? nodeStyle.SelectedBoundaryColor
: nodeStyle.NormalBoundaryColor;
if (geom.hovered())
{
QPen p(color, nodeStyle.HoveredPenWidth);
painter->setPen(p);
}
else
{
QPen p(color, nodeStyle.PenWidth);
painter->setPen(p);
}
//Drawing the validation message background
if (modelValidationState == NodeValidationState::Error)
{
painter->setBrush(nodeStyle.ErrorColor);
}
else
{
painter->setBrush(nodeStyle.WarningColor);
}
double const radius = 3.0;
float diam = nodeStyle.ConnectionPointDiameter;
QRectF boundary(-diam,
-diam + geom.height() - geom.validationHeight(),
2.0 * diam + geom.width(),
2.0 * diam + geom.validationHeight());
painter->drawRoundedRect(boundary, radius, radius);
painter->setBrush(Qt::gray);
//Drawing the validation message itself
QString const &errorMsg = model->validationMessage();
QFont f = painter->font();
QFontMetrics metrics(f);
auto rect = metrics.boundingRect(errorMsg);
QPointF position((geom.width() - rect.width()) / 2.0,
geom.height() - (geom.validationHeight() - diam) / 2.0);
painter->setFont(f);
painter->setPen(nodeStyle.FontColor);
painter->drawText(position, errorMsg);
}
}