private void pictureBox_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && ModifierKeys == Keys.Control)
{
move = true;
moveLastLocation = e.Location;
pictureBox.Cursor = Cursors.NoMove2D;
}
else if (e.Button == MouseButtons.Left)
{
if (dragElement != null)
{
var overflowElements = scheme.GetElementsAtRectangle(
dragElement.X,
dragElement.Y,
dragElement.Width,
dragElement.Height
);
if (overflowElements.Count() == 0 || (overflowElements.Count() == 1 && overflowElements.Contains(dragElement)))
{
dragElement = null;
}
}
else if (moveButton.Checked)
{
modified = true;
dragElement = scheme.GetElementAtLocation(e.Location) as IMoveableElement;
}
if (connectLine != null)
{
var underMouseElement = scheme.GetElementAtLocation(e.Location) as IMoveableElement;
if (underMouseElement != null && underMouseElement != connectLine.connection.Item1)
{
connectLine.connection = new Tuple <IMoveableElement, IMoveableElement>(
connectLine.connection.Item1,
underMouseElement
);
var add = !scheme.Elements.Contains(connectLine);
if (connectLine.connection.Item2 is Component)
{
((Component)connectLine.connection.Item2).AddInput(connectLine.connection.Item1.Name);
}
else if (connectLine.connection.Item2 is Output && string.IsNullOrEmpty(((Output)connectLine.connection.Item2).Input))
{
((Output)connectLine.connection.Item2).Input = connectLine.connection.Item1.Name;
}
else
{
add = false;
}
if (add)
{
scheme.AddElement(connectLine);
DrawScheme();
connectLine = null;
}
}
}
else if (connectionButton.Checked)
{
var underMouseElement = scheme.GetElementAtLocation(e.Location) as IMoveableElement;
if (underMouseElement != null && !(underMouseElement is Output))
{
modified = true;
connectLine = new Line(underMouseElement, null);
}
}
if (deleteButton.Checked)
{
var toDelete = scheme.GetElementAtLocation(e.Location);
if (toDelete != null)
{
modified = true;
scheme.RemoveElement(toDelete);
DrawScheme();
}
}
}
else if (e.Button == MouseButtons.Right)
{
if (connectLine != null)
{
DrawScheme();
}
dragElement = null;
connectLine = null;
menuElement = scheme.GetElementAtLocation(e.Location) as IMoveableElement;
pictureBox.ContextMenuStrip = (menuElement == null ? schemeMenuStrip : elementMenuStrip);
}
}
