public override void MouseDown(ViewportBase vp, ViewportEvent e)
{
_clickSelectionDone = false;
if (_currentTool != null)
{
// If the current tool handles the event, we're done
_currentTool.MouseDown(vp, e);
if (e.Handled)
{
return;
}
}
if (!(vp is Viewport2D))
{
MouseDown((Viewport3D)vp, e);
return;
}
if (_currentTool == null)
{
return;
}
if (_currentTool.NoSelection())
{
return;
}
var viewport = (Viewport2D)vp;
// Otherwise we try a selection
// Find the clicked vertices
var vtxs = _currentTool.GetVerticesAtPoint(e.X, viewport.Height - e.Y, viewport);
if (!vtxs.Any())
{
// Nothing clicked
if (!KeyboardState.Ctrl)
{
// Deselect all the points if not ctrl-ing
Points.ForEach(x => x.IsSelected = false);
}
// Try to select in 2D
// Create a box to represent the click, with a tolerance level
var unused = viewport.GetUnusedCoordinate(new Coordinate(100000, 100000, 100000));
var tolerance = 4 / viewport.Zoom; // Selection tolerance of four pixels
var used = viewport.Expand(new Coordinate(tolerance, tolerance, 0));
var add = used + unused;
var click = viewport.Expand(viewport.ScreenToWorld(e.X, viewport.Height - e.Y));
var box = new Box(click - add, click + add);
var centerHandles = Select.DrawCenterHandles;
var centerOnly = Select.ClickSelectByCenterHandlesOnly;
// Get the first element that intersects with the box
var solid = Document.Map.WorldSpawn.GetAllNodesIntersecting2DLineTest(box, centerHandles, centerOnly).OfType <Solid>().FirstOrDefault();
if (solid != null)
{
// select solid
var select = new[] { solid };
var deselect = !KeyboardState.Ctrl ? Document.Selection.GetSelectedObjects() : new MapObject[0];
Document.PerformAction("Select VM solid", new ChangeSelection(select, deselect));
// Don't do other click operations
return;
}
base.MouseDown(vp, e);
return;
}
var vtx = vtxs.First();
// When clicking, only select vertices in a single solid
vtxs = vtxs.Where(x => x.Solid == vtx.Solid).ToList();
// If any vertices are selected, don't change the selection yet
if (!vtxs.Any(x => x.IsSelected))
{
_clickSelectionDone = true;
DoSelection(vtxs, viewport);
}
// Only move selected vertices
vtxs = vtxs.Where(x => x.IsSelected).ToList();
if (!vtxs.Any())
{
return;
}
// Use the fist vertex as the control point
_currentTool.DragStart(vtxs);
MoveSelection = vtxs;
_snapPointOffset = SnapIfNeeded(viewport.Expand(viewport.ScreenToWorld(e.X, viewport.Height - e.Y))) - viewport.ZeroUnusedCoordinate(vtx.Coordinate);
_movingPoint = vtx;
}
