public override void CanvasTool_MouseDown(object sender, MouseEventArgs e)
{
if (_canvas == null || CurrentLayer() == null || !CurrentLayer().IsLine)
{
return;
}
if (WorkStopped())
{
return;
}
OECPVertex vtx = new OECPVertex(e.Location.X, e.Location.Y);
if (IsWaiting())
{
if (e.Button != MouseButtons.Left)
{
return;
}
SetBusy();
var st = _canvas.C2I(vtx);
_ptCollection.Add(st);
_canvas.VertexLayer().AddElement(st);
_canvas.RepaintCanvas();
return;
}
if (IsWorking())
{
SetWaiting();
_canvas.FreezeRightClickMenu(true);
if (e.Button == MouseButtons.Left)
{
var edPt = _canvas.C2I(vtx);
_ptCollection.Add(edPt);
_canvas.VertexLayer().AddElements(_ptCollection);
var line = new OECPLine(_ptCollection[0], _ptCollection[1]);
CurrentLayer().AddElement(line);
_ptCollection.Clear();
_canvas.RepaintCanvas();
}
if (e.Button == MouseButtons.Right)
{
var vtxLayer = _canvas.VertexLayer();
if (vtxLayer == null)
{
return;
}
vtx = _ptCollection[0];
vtxLayer.DeleteVertex(vtx);
_ptCollection.Clear();
_canvas.RepaintCanvas();
}
}
}
bool VertexAtBoundary(OECPVertex vtx, RectangleF square)
{
var leftLine = new OECPLine(new OECPVertex(square.Left, square.Top), new OECPVertex(square.Left, square.Bottom), true);
var rightLine = new OECPLine(new OECPVertex(square.Right, square.Top), new OECPVertex(square.Right, square.Bottom), true);
var topLine = new OECPLine(new OECPVertex(square.Left, square.Top), new OECPVertex(square.Right, square.Top), true);
var botLine = new OECPLine(new OECPVertex(square.Left, square.Bottom), new OECPVertex(square.Right, square.Bottom), true);
bool onLeft = leftLine.VertexOnLine(vtx);
if (onLeft)
{
_projVtx = leftLine.GetProjectVertex(vtx);
return(true);
}
bool onRight = rightLine.VertexOnLine(vtx);
if (onRight)
{
_projVtx = rightLine.GetProjectVertex(vtx);
return(true);
}
bool onTop = topLine.VertexOnLine(vtx);
if (onTop)
{
_projVtx = topLine.GetProjectVertex(vtx);
return(true);
}
bool onBot = botLine.VertexOnLine(vtx);
if (onBot)
{
_projVtx = botLine.GetProjectVertex(vtx);
return(true);
}
return(false);
}
