private Rectangle2D getContentsBoundingBox() {
Rectangle2D bb = null;
for (VisualVertex v : Hierarchy.getChildrenOfType(this, VisualVertex.class)) {
bb = BoundingBoxHelper.union(bb, v.getBoundingBox());
}
for (VisualVariable v : Hierarchy.getChildrenOfType(this, VisualVariable.class)) {
bb = BoundingBoxHelper.union(bb, v.getBoundingBox());
}
for (VisualArc a : Hierarchy.getChildrenOfType(this, VisualArc.class)) {
bb = BoundingBoxHelper.union(bb, a.getLabelBoundingBox());
}
if (bb == null) bb = contentsBB;
else {
bb.setRect(
bb.getMinX() - frameDepth,
bb.getMinY() - frameDepth,
bb.getWidth() + 2.0 * frameDepth,
bb.getHeight() + 2.0 * frameDepth);
}
if (bb == null) bb = new Rectangle2D.Double(0, 0, 1, 1);
contentsBB = (Rectangle2D) bb.clone();
return bb;
}
/** Paints the <tt>visualEdge</tt>. No arrowhead is drawn. */
public void paint(VisualGraphComponent component, Graphics2D g2d) {
VisualEdge vEdge = (VisualEdge) component;
Rectangle fromvertexBounds;
Rectangle tovertexBounds;
GeneralPath drawPath;
VisualVertex visualVertexA = vEdge.getVisualVertexA();
VisualVertex visualVertexB = vEdge.getVisualVertexB();
GraphLayoutManager layoutmanager = vEdge.getVisualGraph().getGraphLayoutManager();
drawPath = vEdge.getGeneralPath();
// If there is no layoutmanager or there is one but the layout has not
// been initialised, by default, let us route edges as straight lines.
if (layoutmanager == null || (layoutmanager != null && !layoutmanager.isInitialized())) {
fromvertexBounds = visualVertexA.getBounds();
tovertexBounds = visualVertexB.getBounds();
// Make sure to clear the GeneralPath() first. Otherwise, the edge's previous
// path will be redrawn as well.
drawPath.reset();
// Start the line from the center of the vEdgertex
drawPath.moveTo((float) fromvertexBounds.getCenterX(), (float) fromvertexBounds.getCenterY());
drawPath.lineTo((float) tovertexBounds.getCenterX(), (float) tovertexBounds.getCenterY());
} else {
// Let the layout manager determine how the edge will be routed.
layoutmanager.routeEdge(g2d, vEdge);
}
// Draw the line
g2d.setColor(vEdge.getOutlinecolor());
g2d.draw(drawPath);
// Draw the edge label
this.paintText(vEdge, g2d);
}
/**
* Adds the specified {@link VisualVertex} to the Grid.
*
* @param visualVertex The VisualVertex to add
* @return <code>true</code> if the VisualVertex was added successfully to this Grid, <code>false
* </code> otherwise
*/
boolean addVisualVertexToGrid(VisualVertex visualVertex) {
int positionX = visualVertex.getGridPoint().getPositionX();
int positionY = visualVertex.getGridPoint().getPositionY();
// Early negative return if specified GridPoint is invalid
if (!Validation.isValidGridPoint(
visualVertex.getGridPoint(), this.horizontalGridPoints, this.verticalGridPoints)) {
return false;
}
// Get VisualVertex at specified GridPoint
VisualVertex visualVertexAtGridPoint = this.grid[positionX][positionY];
// Return false if GridPoint is not empty
if (visualVertexAtGridPoint != null) {
return false;
}
// Add VisualVertex
this.grid[positionX][positionY] = visualVertex;
return true;
}