25#include <QStyleOptionGraphicsItem>
60 mPolygon = polygon.translated( -topLeft );
63void QgsLayoutNodesItem::init()
67 setCacheMode( QGraphicsItem::NoCache );
77 painter->setPen( Qt::NoPen );
78 painter->setBrush( Qt::NoBrush );
84 if ( mDrawNodes &&
layout()->renderContext().isPreviewRender() )
96 return std::sqrt( std::pow( pt1.x() - pt2.x(), 2 ) + std::pow( pt1.y() - pt2.y(), 2 ) );
100 const bool checkArea,
101 const double radius )
103 const QPointF start = mapFromScene( pt );
104 double minDistance = std::numeric_limits<double>::max();
105 const double maxDistance = ( checkArea ) ? radius : minDistance;
109 for (
int i = 0; i !=
mPolygon.size(); i++ )
112 const QPointF pt1 =
mPolygon.at( i );
118 const double coef = ( pt2.y() - pt1.y() ) / ( pt2.x() - pt1.x() );
119 const double b = pt1.y() - coef * pt1.x();
121 double distance = std::numeric_limits<double>::max();
122 if ( std::isinf( coef ) )
123 distance = std::fabs( pt1.x() - start.x() );
126 const double coef2 = ( -1 / coef );
127 const double b2 = start.y() - coef2 * start.x();
130 if ( std::isinf( coef2 ) )
132 distance = std::fabs( pt1.y() - start.y() );
133 inter.setX( start.x() );
134 inter.setY( pt1.y() );
138 const double interx = ( b - b2 ) / ( coef2 - coef );
139 const double intery = interx * coef2 + b2;
140 inter.setX( interx );
141 inter.setY( intery );
148 const double length4 = length1 + length2;
150 if ( std::fabs( length3 - length4 ) < std::numeric_limits<float>::epsilon() )
154 if ( distance < minDistance && distance < maxDistance )
156 minDistance = distance;
163 rc =
_addNode( idx, start, maxDistance );
177 QVariantMap properties;
178 properties.insert( QStringLiteral(
"name" ), QStringLiteral(
"cross" ) );
179 properties.insert( QStringLiteral(
"color_border" ), QStringLiteral(
"red" ) );
181 std::unique_ptr<QgsMarkerSymbol> symbol;
183 symbol->setSize( rectSize );
184 symbol->setAngle( 45 );
187 for (
const QPointF pt : std::as_const(
mPolygon ) )
188 symbol->renderPoint( pt * context.viewScaleFactor(), nullptr, context.renderContext() );
191 if ( mSelectedNode >= 0 && mSelectedNode <
mPolygon.size() )
192 drawSelectedNode( context );
199 QVariantMap properties;
200 properties.insert( QStringLiteral(
"name" ), QStringLiteral(
"square" ) );
201 properties.insert( QStringLiteral(
"color" ), QStringLiteral(
"0, 0, 0, 0" ) );
202 properties.insert( QStringLiteral(
"color_border" ), QStringLiteral(
"blue" ) );
203 properties.insert( QStringLiteral(
"width_border" ), QStringLiteral(
"4" ) );
205 std::unique_ptr<QgsMarkerSymbol> symbol;
207 symbol->setSize( rectSize );
215 const bool searchInRadius,
216 const double radius )
const
218 const QPointF pt = mapFromScene( node );
219 double nearestDistance = std::numeric_limits<double>::max();
220 const double maxDistance = ( searchInRadius ) ? radius : nearestDistance;
225 for (
const QPointF polyPt : std::as_const(
mPolygon ) )
228 if ( distance < nearestDistance && distance < maxDistance )
230 nearestDistance = distance;
243 if ( index >= 0 && index <
mPolygon.size() )
245 position = mapToScene(
mPolygon.at( index ) );
267 if ( index >= 0 && index <
mPolygon.size() )
269 const QPointF nodeItem = mapFromScene( pt );
270 mPolygon.replace( index, nodeItem );
283 const QDomElement styleSymbolElem = itemElem.firstChildElement( QStringLiteral(
"symbol" ) );
284 if ( !styleSymbolElem.isNull() )
289 const QDomNodeList nodesList = itemElem.elementsByTagName( QStringLiteral(
"node" ) );
290 for (
int i = 0; i < nodesList.size(); i++ )
292 const QDomElement nodeElem = nodesList.at( i ).toElement();
294 newPt.setX( nodeElem.attribute( QStringLiteral(
"x" ) ).toDouble() );
295 newPt.setY( nodeElem.attribute( QStringLiteral(
"y" ) ).toDouble() );
317 trans = trans.scale( ratioX, ratioY );
326 if ( index >= 0 && index <
mPolygon.size() )
328 mSelectedNode = index;
338 const QRectF br =
mPolygon.boundingRect();
340 const QPointF topLeft = mapToScene( br.topLeft() );
345 mPolygon.translate( -br.topLeft().x(), -br.topLeft().y() );
352 prepareGeometryChange();
365 QDomElement nodesElem = doc.createElement( QStringLiteral(
"nodes" ) );
366 for (
const QPointF pt : std::as_const(
mPolygon ) )
368 QDomElement nodeElem = doc.createElement( QStringLiteral(
"node" ) );
369 nodeElem.setAttribute( QStringLiteral(
"x" ), QString::number( pt.x() ) );
370 nodeElem.setAttribute( QStringLiteral(
"y" ), QString::number( pt.y() ) );
371 nodesElem.appendChild( nodeElem );
373 elem.appendChild( nodesElem );
Contains settings and helpers relating to a render of a QgsLayoutItem.
QgsRenderContext & renderContext()
Returns a reference to the context's render context.
double viewScaleFactor() const
Returns the current view zoom (scale factor).
Base class for graphical items within a QgsLayout.
virtual void setFrameEnabled(bool drawFrame)
Sets whether this item has a frame drawn around it or not.
@ FlagDisableSceneCaching
Item should not have QGraphicsItem caching enabled.
void sizePositionChanged()
Emitted when the item's size or position changes.
void clipPathChanged()
Emitted when the item's clipping path has changed.
void attemptSetSceneRect(const QRectF &rect, bool includesFrame=false)
Attempts to update the item's position and size to match the passed rect in layout coordinates.
void setBackgroundEnabled(bool drawBackground)
Sets whether this item has a background drawn under it or not.
QgsLayoutItem::Flags itemFlags() const override
Returns the item's flags, which indicate how the item behaves.
virtual void updateBoundingRect()
Called when the bounding rect of the item should recalculated.
virtual bool _removeNode(int nodeIndex)=0
Method called in removeNode.
QPolygonF nodes() const
Returns the nodes the shape consists of.
double mMaxSymbolBleed
Max symbol bleed.
virtual void _writeXmlStyle(QDomDocument &doc, QDomElement &elmt, const QgsReadWriteContext &context) const =0
Method called in writeXml.
QRectF mCurrentRectangle
Current bounding rectangle of shape.
bool readPropertiesFromElement(const QDomElement &element, const QDomDocument &document, const QgsReadWriteContext &context) override
Sets item state from a DOM element.
bool setSelectedNode(int index)
Selects a node by index.
bool writePropertiesToElement(QDomElement &element, QDomDocument &document, const QgsReadWriteContext &context) const override
Stores item state within an XML DOM element.
void updateSceneRect()
Update the current scene rectangle for this item.
virtual void _readXmlStyle(const QDomElement &elmt, const QgsReadWriteContext &context)=0
Method called in readXml.
bool removeNode(int index)
Remove a node with specified index from the shape.
QRectF boundingRect() const override
double computeDistance(QPointF pt1, QPointF pt2) const
Compute an euclidean distance between 2 nodes.
bool nodePosition(int index, QPointF &position) const
Gets the position of a node in scene coordinates.
bool addNode(QPointF point, bool checkArea=true, double radius=10)
Add a node in current shape.
bool moveNode(int index, QPointF node)
Moves a node to a new position.
double estimatedFrameBleed() const override
Returns the estimated amount the item's frame bleeds outside the item's actual rectangle.
void draw(QgsLayoutItemRenderContext &context) override
Draws the item's contents using the specified item render context.
virtual void _draw(QgsLayoutItemRenderContext &context, const QStyleOptionGraphicsItem *itemStyle=nullptr)=0
Method called in paint.
QgsLayoutNodesItem(QgsLayout *layout)
Constructor for QgsLayoutNodesItem, attached to the specified layout.
virtual bool _addNode(int nodeIndex, QPointF newNode, double radius)=0
Method called in addNode.
void rescaleToFitBoundingBox()
Rescale the current shape according to the item's bounding box.
void setNodes(const QPolygonF &nodes)
Sets the nodes the shape consists of.
QPolygonF mPolygon
Shape's nodes.
int nodeAtPosition(QPointF point, bool searchInRadius=true, double radius=10) const
Search for the nearest node in the shape within a maximal area.
const QgsLayout * layout() const
Returns the layout the object is attached to.
void changed()
Emitted when the object's properties change.
Base class for layouts, which can contain items such as maps, labels, scalebars, etc.
static QgsMarkerSymbol * createSimple(const QVariantMap &properties)
Create a marker symbol with one symbol layer: SimpleMarker with specified properties.
The class is used as a container of context for various read/write operations on other objects.
void setForceVectorOutput(bool force)
Sets whether rendering operations should use vector operations instead of any faster raster shortcuts...
QPainter * painter()
Returns the destination QPainter for the render operation.
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)