private void Canvas_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && !selectionBegin)
{
PointF pos = canvas.ScreenToWorld(new Point(e.X, e.Y));
CanvasItem item = canvas.HitTest(pos);
if (item != null)
{
// Нажали внутри итема
if (!item.Selected)
{
// Если не выделен - выделить
if (canvas.GetModifierKeys() != Keys.Shift)
{
canvas.UnselectAll();
}
item.Select();
canvas.Invalidate();
}
else
{
// Если выделен - начать перетаскивание
selectedDragItems = canvas.GetSelected();
foreach (var next in selectedDragItems)
{
next.SavedPos = new PointF(next.Pos.X, next.Pos.Y);
next.SavedPosEnd = new PointF(next.PosEnd.X, next.PosEnd.Y);
next.SavedPoints = new List <PointF>();
foreach (var point in next.Points)
{
next.SavedPoints.Add(point);
}
}
savedMouse = new Point(e.X, e.Y);
draggingBegin = true;
}
}
else
{
// Рамка выделения
List <PointF> points = new List <PointF>();
points.Add(pos);
points.Add(pos);
points.Add(pos);
points.Add(pos);
points.Add(pos);
selectionBox = new CanvasPolyLine(points);
selectionBox.FrontColor = Color.Black;
canvas.AddItem(selectionBox);
selectionBegin = true;
}
}
else if (e.Button == MouseButtons.Right && !scrollingBegin)
{
savedScroll = new PointF(canvas.Scroll.X, canvas.Scroll.Y);
savedMouse = new Point(e.X, e.Y);
canvas.Cursor = Cursors.SizeAll;
scrollingBegin = true;
}
}