public override void OnMouseDown(ZWPictureBox pictureBox, MouseEventArgs e)
{
wasMove = false;
Point point = new Point(e.X, e.Y);
selectMode = SelectionMode.None;
dragBoxFromMouseDown = Rectangle.Empty;
// Test for moving or resizing (only if control is selected, cursor is on the handle)
foreach (DrawObject o in pictureBox.GraphicsList)
{
if (o is DrawCircle)
{
continue;
}
DrawObject.HitTestResult htr = o.HitTest(pictureBox, point, false);
if (!o.Selected) // test for drag and drop
{
if (htr.ElementType == DrawObject.ElementType.Gate)
{
Size dragSize = SystemInformation.DragSize;
dragBoxFromMouseDown = new Rectangle(new Point(e.X - (dragSize.Width / 2),
e.Y - (dragSize.Height / 2)), dragSize);
selectMode = SelectionMode.Drag;
}
}
else if (htr.ElementType == DrawTools.DrawObject.ElementType.Handle)
{
int handleNumber = htr.Index;
if (handleNumber > 0)
{
selectMode = SelectionMode.Size;
// keep resized object in class member
resizedObject = o;
resizedObjectHandle = handleNumber;
//Restore DrawPolygonFrame para
if (resizedObject is DrawPolyLine)
{
(resizedObject as DrawPolyLine).NeedReverseX = false;
(resizedObject as DrawPolyLine).NeedReverseY = false;
(resizedObject as DrawPolyLine).SetProportion = true;
}
pictureBox.GraphicsList.UnselectAll();
o.Selected = true;
}
}
else if (htr.ElementType == DrawObject.ElementType.Gate)
{
selectMode = SelectionMode.Move;
pictureBox.Cursor = Cursors.SizeAll;
break;
}
}
// Test for selection (cursor is on the object or label)
if (selectMode == SelectionMode.None || selectMode == SelectionMode.Drag)
{
DrawObject o = null;
int gateIndex = 0;
for (int i = 0; i < pictureBox.GraphicsList.Count; i++)
{
if (pictureBox.GraphicsList[i] is DrawCircle)
{
continue;
}
DrawObject.HitTestResult htr = pictureBox.GraphicsList[i].HitTest(pictureBox, point, true);
if (htr.ElementType == DrawObject.ElementType.Gate)
{
o = pictureBox.GraphicsList[i];
gateIndex = htr.Index;
selectMode = o.Selected ? SelectionMode.Move : SelectionMode.Select;
break;
}
}
if (o != null)
{
if ((Control.ModifierKeys & Keys.Control) == 0 && !o.Selected)
{
pictureBox.GraphicsList.UnselectAll();
}
o.Selected = true;
}
}
// un-select
if (selectMode == SelectionMode.None || selectMode == SelectionMode.Drag)
{
// click on background
if ((Control.ModifierKeys & Keys.Control) == 0)
{
pictureBox.GraphicsList.UnselectAll();
}
}
// Net selection
if (selectMode == SelectionMode.None)
{
selectMode = SelectionMode.NetSelection;
}
lastPoint.X = e.X;
lastPoint.Y = e.Y;
startPoint.X = e.X;
startPoint.Y = e.Y;
pictureBox.Capture = true;
pictureBox.Refresh();
}
/// <summary>
/// delete draw objcet
/// </summary>
/// <param name="drawObject"></param>
public void DeleteDrawObject(DrawObject drawObject)
{
graphicsList.Remove(drawObject);
}