Examples with GPoint org.antlr.works.visualization.graphics.primitive.GPoint used on opensource projects

Example 1 with GPoint

use of org.antlr.works.visualization.graphics.primitive.GPoint in project antlrworks by antlr.

the class GRenderer method recursiveRenderPositionAlternative.

public FAState recursiveRenderPositionAlternative(FAState state, GPoint basePoint) {
    FAState alternativeEndState = alternativeEndState(state);
    // This point is used to position each transition
    GPoint point = new GPoint(basePoint);
    point.addX(GContext.NODE_WIDTH + GContext.EPSILON_WIDTH);
    GDimension firstAlternativeDimension = null;
    for (int t = 0; t < state.getNumberOfTransitions(); t++) {
        FATransition transition = state.transition(t);
        GLink link = getNode(state).getLink(transition);
        if (t == 0) {
            // We remember here the size of the first transition because if we find later
            // a "loop" transition, we will have to offset this "loop" by the size of the first
            // transition (because the "loop" is always drawed above the first transition).
            firstAlternativeDimension = link.branchDim;
        }
        if (t > 0 && !transition.loop) {
            // Offset the current point for each transition (except for a "loop" because it is
            // displayed above the first transition)
            point.addY(GContext.LINE_SPACE);
            point.addY(link.branchDim.up);
        }
        if (transition.target == alternativeEndState) {
            // The transition is simply a single transition (epsilon normally).
            if (transition.loop) {
                // If this is a "loop", draw it above the first transition
                GPoint vp = new GPoint(basePoint);
                vp.subY(firstAlternativeDimension.up);
                vp.subY(link.branchDim.down);
                // The "virtual position" is used by the link to know where to display itself
                // when it has to "curve" (because both start and end point are on the same y-axis value)
                getNode(state).getLink(transition).setVirtualPosition(vp);
            } else {
                getNode(state).getLink(transition).setVirtualPosition(point);
                point.addY(link.branchDim.down);
            }
        } else {
            // The transition is more than a single transition, continue recursively...
            recursiveRenderPositionNode(transition.target, alternativeEndState, new GPoint(point));
            point.addY(link.branchDim.down);
        }
    }
    return alternativeEndState;
}