public void InstallLineHandle(int pointIndex)
{
var handle = new LineHandle(new Ellipse(this[pointIndex].X, this[pointIndex].Y, 10, 10), pointIndex, this);
handle.SetSnapTargets(SnapTargets.Center);
AddHandle(handle);
}
public override void OnMouseMove(Canvas canvas, float mouseX, float mouseY, bool isShiftKey, bool isCtrlKey)
{
if (!_isInitialized)
{
_isInitialized = true;
_line = new Line(0, 0, 0, 0);
_line.SetSnapTargets(SnapTargets.Vertices);
_lineHandle = new LineHandle(new Ellipse(mouseX, mouseY, 10, 10), 0, _line)
{
CanBeSnapTarget = false,
FillColor = Colors.Transparent
};
foreach (var snapPolicy in canvas.GetSnapPolicies())
{
snapPolicy.InitSnap(canvas, _lineHandle.GetSnapPoints(), new [] { _lineHandle });
}
canvas.Selection.Clear();
canvas.AddFigure(_lineHandle);
}
var snapPoint = new Point(mouseX, mouseY);
var isSnapped = false;
foreach (var snapPolicy in canvas.GetSnapPolicies())
{
Point delta;
isSnapped = snapPolicy.Snap(canvas, snapPoint, 0, 0, mouseX, mouseY, out snapPoint, out delta,
new[] { _lineHandle });
if (isSnapped)
{
break;
}
}
if (isSnapped)
{
mouseX = snapPoint.X;
mouseY = snapPoint.Y;
}
_lineHandle.ForceSetPositionCenter(mouseX, mouseY);
if (_clickCount == 0)
{
_line[0] = new Point(mouseX, mouseY);
_line[1] = new Point(mouseX, mouseY);
}
else
{
_line[1] = new Point(mouseX, mouseY);
}
}
/// <summary>
/// Creates the handles for the manipulation of the object.
/// </summary>
private void CreateHandles()
{
var segments = this.GetRectangle();
this.rightWidthHandle = this.handleManager.CreateLineHandle(segments[0], HandleLocationType.Other, HandleEffectType.Geometry);
this.topHeightHandle = this.handleManager.CreateLineHandle(segments[1], HandleLocationType.Other, HandleEffectType.Geometry);
this.leftWidthHandle = this.handleManager.CreateLineHandle(segments[2], HandleLocationType.Other, HandleEffectType.Geometry);
this.bottomHeightHandle = this.handleManager.CreateLineHandle(segments[3], HandleLocationType.Other, HandleEffectType.Geometry);
this.AttachHandlers();
}
/// <summary>
/// Returns the line number, text content, and marker status of the given line, which can be either a number or a handle returned by setMarker.
/// The returned object has the structure {line, handle, text, markerText, markerClass, lineClass, bgClass}.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineInfo lineInfo(LineHandle line) { return null; }
/// <summary>
/// Register a function that should be called when the line is deleted from the document.
/// </summary>
/// <param name="line"></param>
/// <param name="func"></param>
public void onDeleteLine(LineHandle line, JsAction func) { }
/// <summary>
/// The inverse of hideLine—re-shows a previously hidden line, by number or by handle.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineHandle showLine(LineHandle line) { return null; }
/// <summary>
/// Hide the given line (either by number or by handle). Hidden lines don't show up in the editor, and their numbers are skipped when line numbers are enabled.
/// Deleting a region around them does delete them, and coping a region around will include them in the copied text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineHandle hideLine(LineHandle line) { return null; }
/// <summary>
/// Set a CSS class name for the given line. line can be a number or a line handle (as returned by setMarker or this function).
/// className will be used to style the text for the line, and backgroundClassName to style its background (which lies behind the selection).
/// Pass null to clear the classes for a line.
/// </summary>
/// <param name="line"></param>
/// <param name="className"></param>
/// <param name="backgroundClassName"></param>
/// <returns></returns>
public LineHandle setLineClass(LineHandle line, JsString className, JsString backgroundClassName) { return null; }
/// <summary>
/// Clears a marker created with setMarker.
/// line can be either a number or a handle returned by setMarker (since a number may now refer to a different line if something was added or deleted).
/// </summary>
/// <param name="line"></param>
public void clearMarker(LineHandle line) { }