HitTestResultBehavior NodeOrRailHitTestSelOnlyOneNodeCallback(HitTestResult result)
{
var frameworkElement = result.VisualHit as FrameworkElement;
if (!(frameworkElement is Path))
{
return(HitTestResultBehavior.Continue);
}
object tag = frameworkElement.Tag;
if (tag != null)
{
GraphmapsNode graphmapsNode = tag as GraphmapsNode;
if (graphmapsNode != null)
{
_nodeUnderMouse = graphmapsNode;
return(HitTestResultBehavior.Stop);
}
else
{
var rail = frameworkElement.Tag as Rail;
if (rail != null)
{
_railUnderMouse = rail;
}
}
}
return(HitTestResultBehavior.Continue);
}
public object GetNodeOrRailUnderMouse(RectangleGeometry rect) {
_nodeUnderMouse = null;
_railUnderMouse = null;
VisualTreeHelper.HitTest(_graphCanvas, null,
NodeOrRailHitTestSelOnlyOneNodeCallback,
new GeometryHitTestParameters(rect));
return (object)_nodeUnderMouse ?? _railUnderMouse;
}
public object GetNodeOrRailUnderMouse(RectangleGeometry rect)
{
_nodeUnderMouse = null;
_railUnderMouse = null;
VisualTreeHelper.HitTest(_graphCanvas, null,
NodeOrRailHitTestSelOnlyOneNodeCallback,
new GeometryHitTestParameters(rect));
return((object)_nodeUnderMouse ?? _railUnderMouse);
}
HitTestResultBehavior NodeOrRailHitTestSelOnlyOneNodeCallback(HitTestResult result) {
var frameworkElement = result.VisualHit as FrameworkElement;
if (!(frameworkElement is Path))
return HitTestResultBehavior.Continue;
object tag = frameworkElement.Tag;
if (tag != null) {
GraphmapsNode graphmapsNode = tag as GraphmapsNode;
if (graphmapsNode != null) {
_nodeUnderMouse = graphmapsNode;
return HitTestResultBehavior.Stop;
}
else {
var rail = frameworkElement.Tag as Rail;
if (rail != null)
_railUnderMouse = rail;
}
}
return HitTestResultBehavior.Continue;
}
void SetNodeAppearence(GraphmapsNode node) {
node.Node.Attr.LineWidth = GetBorderPathThickness();
}
bool IsSelected(GraphmapsNode vnode) {
//if (lgSettings == null) return false;
var nodeInfo = _lgLayoutSettings.GeometryNodesToLgNodeInfos[vnode.Node.GeometryNode];
if (nodeInfo == null) return false;
return nodeInfo.Selected;
}
void SelectEdgesIncidentTo(GraphmapsNode vnode) {
var lgSettings = Graph.LayoutAlgorithmSettings as LgLayoutSettings;
if (lgSettings == null) return;
var nodeInfo = lgSettings.GeometryNodesToLgNodeInfos[vnode.Node.GeometryNode];
lgSettings.Interactor.SelectAllEdgesIncidentTo(nodeInfo);
ViewChangeEvent(null, null);
}
void HandleClickForNode(GraphmapsNode vnode) {
if (clickCounter.DownCount == clickCounter.UpCount && clickCounter.UpCount == 1) {
//SelectRailsOfIncidentEdgesOnActiveLayer(vnode, !isSelected(vnode));
SelectEdgesIncidentTo(vnode);
SelectUnselectNode(vnode.LgNodeInfo, !IsSelected(vnode));
//ToggleNodeSlidingZoom(vnode);
//ToggleNodeEdgesSlidingZoom(vnode);
}
vnode.Invalidate();
}
GraphmapsNode CreateVNode(Node node) {
lock (this) {
Debug.Assert(!_drawingObjectsToIViewerObjects.ContainsKey(node));
FrameworkElement feOfLabel = CreateAndRegisterFrameworkElementOfDrawingNode(node);
var vn = new GraphmapsNode(node, GetCorrespondingLgNode(node), feOfLabel,
e => (GraphmapsEdge)_drawingObjectsToIViewerObjects[e], () => GetBorderPathThickness() * node.Attr.LineWidth, _lgLayoutSettings);
foreach (var fe in vn.FrameworkElements) {
GraphCanvasChildrenAdd(fe);
Panel.SetZIndex(fe, 500);
}
if (feOfLabel != null) {
Panel.SetZIndex(feOfLabel, 600);
var viewbox = feOfLabel as Viewbox;
if (viewbox != null)
if (!string.IsNullOrEmpty(node.LabelText))
viewbox.IsHitTestVisible = true;
}
_drawingObjectsToIViewerObjects[node] = vn;
node.Attr.LineWidth = GetBorderPathThickness();
return vn;
}
}
void AdjustNodeVisualsForHighZoomLevel(int iLevel, GraphmapsNode vnode, Node node) {
var levelScale = GetLevelScale(iLevel);
var nodeDotWidth = _lgLayoutSettings.NodeDotWidthInInches*DpiX/levelScale;
var nodeMinWidth = _lgLayoutSettings.NodeDotWidthInInchesMinInImage*DpiX/levelScale;
if (vnode.LgNodeInfo.ZoomLevel > Math.Pow(2, iLevel))
nodeDotWidth = Math.Max(nodeMinWidth,
nodeDotWidth*(2*Math.Pow(2, iLevel)/vnode.LgNodeInfo.ZoomLevel));
else {
HideVNode(node);
return;
}
vnode.Node.Attr.LineWidth = 0; //GetBorderPathThickness(tileScale);
vnode.InvalidateNodeDot(nodeDotWidth*0.8); // make them just a bit smaller
vnode.HideNodeLabel();
vnode.SetLowTransparency();
}
private void ArrangeNodeLabel(GraphmapsNode vNode, double zf)
{
double nodeLabelHeight = _lgLayoutSettings.NodeLabelHeightInInches*DpiY/CurrentScale;
double nodeLabelWidth = nodeLabelHeight*vNode.LgNodeInfo.LabelWidthToHeightRatio;
if (vNode.LgNodeInfo.LabelVisibleFromScale >= 0 &&
vNode.LgNodeInfo.LabelVisibleFromScale <= zf) {
var offset = Point.Scale(nodeLabelWidth + NodeDotWidth*1.01, nodeLabelHeight + NodeDotWidth*1.01,
vNode.LgNodeInfo.LabelOffset);
vNode.InvalidateNodeLabel(nodeLabelHeight, nodeLabelWidth, offset);
}
else
vNode.HideNodeLabel();
}
static void SetupTileNode(GraphmapsNode vNode) {
vNode.Node.Attr.LineWidth = 0;
vNode.SetLowTransparency();
}