private void SetSelectedRectangle(Point beginPoint, Point endPoint)
{
// Make sure x/y are top-left, and width/height is bottom-right
Point a = Utils.Min(beginPoint, endPoint);
Point b = Utils.Max(beginPoint, endPoint);
var newRect = Rectangle.FromLTRB(a.X, a.Y, b.X, b.Y);
// Determine if there is a need to update shapes
if (selectedRectangle == newRect)
{
return;
}
// Update selected rectangle
selectedRectangle = newRect;
// Update selected shapes
var shapes = Canvas.Instance.GetShapesByRectangle(selectedRectangle);
ClickData.Clear(true);
ClickData.Set(shapes);
// Update borders of selected shapes
// This may be needed
Canvas.Instance.Invalidate();
}
private void OnMouseDown_HandleDragSelection(object sender, MouseEventArgs e, Point mouseLocation, Point snappedLocation, bool setShapes)
{
if (IsMouseOverSelectedRectangle(mouseLocation))
{
if (setShapes)
{
var shapes = Canvas.Instance.GetShapesByRectangle(selectedRectangle);
ClickData.Set(shapes);
}
mouseDownLocation = snappedLocation;
ClickData.Set(snappedLocation, ShapeClickAction.Drag);
selectedRectangleDownLocation = selectedRectangle.Location;
action = SelectorAction.BeginMoveSelectedShapes;
OnMouseMove(sender, e);
}
else
{
if (!MouseWasDown)
{
action = SelectorAction.BeginSelectionRectangle;
mouseDownLocation = new Point();
selectedRectangleDownLocation = new Point();
ClickData.Clear(true);
OnMouseDown(sender, e);
}
}
}
public override void OnMouseDown(object sender, MouseEventArgs e)
{
// Only run during initial press
if (ClickData.Action != ShapeClickAction.None)
{
return;
}
using (GraphicsPath path = new GraphicsPath(FillMode.Alternate))
{
var location = e.Location;
ClickData.Origin = Grid.SnapToGrid(e.Location);
var shape = Canvas.Instance.layer.GetShapeByPoint(path, location);
switch (e.Button)
{
case MouseButtons.Right:
SharedActions.RemoveShape(shape);
break;
case MouseButtons.Middle:
if (shape != null && shape.Type == ShapeType.Triangle)
{
SharedActions.TriangleIncrementAngle(shape);
}
break;
case MouseButtons.Left:
bool createShape = true;
if (!KeyboardController.IsShiftDown && shape != null)
{
var action = shape.GetShapeActionByPoint(path, location);
if (action != ShapeClickAction.None)
{
ClickData.Set(action, shape);
createShape = false;
OnMouseMove(sender, e);
}
else
{
throw new InvalidOperationException(
"Shape was found under Point, but action wasn't - This shouldn't happen."
);
}
}
if (createShape)
{
var newSize = new Size(20, 20);
var sizeSnapped = Grid.SnapToGrid(newSize, Grid.SnapSizeToGrid);
GenerateShape(sizeSnapped);
}
break;
}
}
Canvas.Instance.Invalidate();
}
internal void Replace(Shape shape, Shape newShape)
{
// If the shape was selected, select replacement shape once created.
bool wasShapeClicked = ClickData.ContainsShapes(shape);
// Replace old shape with new shape
var index = shapes.IndexOf(shape);
shapes[index] = newShape;
if (wasShapeClicked)
{
ClickData.Set(newShape);
}
}
private void GenerateShape(Size size)
{
var layer = Canvas.Instance.layer;
// Generate shape based on either a duplicate or a new shape
Shape shape;
if (!ClickData.IsShapesEmpty() && KeyboardController.IsControlDown)
{
shape = layer.DuplicateShape(ClickData.Shapes[0], ClickData.Origin);
}
else
{
shape = layer.AddNewShape(ClickData.Origin, size,
Canvas.Instance.GetSelectedColor(),
Canvas.Instance.GetSelectedShapeType()
);
}
// Force new shape to go into resize mode.
ClickData.Set(ShapeClickAction.Resize, shape);
}
public override void OnMouseMove(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
var mouseLocation = e.Location;
var snappedLocation = Grid.SnapToGrid(mouseLocation);
switch (action)
{
case SelectorAction.BeginSelectionRectangle:
SetSelectedRectangle(mouseDownLocation, snappedLocation);
break;
case SelectorAction.BeginMoveSelectedShapes:
Canvas.Instance.Focus();
ClickData.Set(ShapeClickAction.Drag);
ClickData.ShapeUpdateOffset(snappedLocation);
Point moveTo = new Point(
snappedLocation.X - mouseDownLocation.X,
snappedLocation.Y - mouseDownLocation.Y
);
selectedRectangle.X = selectedRectangleDownLocation.X + moveTo.X;
selectedRectangle.Y = selectedRectangleDownLocation.Y + moveTo.Y;
break;
default:
throw EnumNotImplementedException.Throw(action, ExceptionMessages.MSG_NOT_YET_IMPLEMENTED);
}
Canvas.Instance.Invalidate();
}
