// Method to generate the rectangle to draw into
public Rectangle GetIconRectangle(DragDropObject ddobj)
{
int index = dragDropObjects.IndexOf(ddobj);
if (index == -1)
{
return(new Rectangle(0, 0, 0, 0));
}
IconSize = ClientRectangle.Height;
int numDDObjectsX = ClientRectangle.Width / IconSize;
if (numDDObjectsX == 0)
{
numDDObjectsX = 1;
}
int ddObjectsX = index % numDDObjectsX;
int ddObjectsY = index / numDDObjectsX;
Rectangle rect = new Rectangle(ddObjectsX * IconSize, ddObjectsY * IconSize, IconSize, IconSize);
rect.Inflate(-IconSize / 10, -IconSize / 10);
return(rect);
}
// Method enabling client DragDropObjects to add a new member
public void AddDragDropObject(DragDropObject senderDDObj, DragDropObject newDDObj)
{
this.Controls.Add(newDDObj);
dragDropObjects.Insert(dragDropObjects.IndexOf(senderDDObj) + 1, newDDObj);
for (int i = dragDropObjects.IndexOf(newDDObj) + 1; i < dragDropObjects.Count(); i++)
{
dragDropObjects[i].UpdateLocation(dragDropObjects[i - 1]);
}
}
// Method enabling client DragDropObjects to delete themselves
public void RemoveDragDropObject(DragDropObject senderDDObj)
{
dragDropObjects[dragDropObjects.IndexOf(senderDDObj)].Location = new Point(
dragDropObjects[dragDropObjects.IndexOf(senderDDObj)].Location.X - dragDropObjects[dragDropObjects.IndexOf(senderDDObj)].Size.Width,
dragDropObjects[dragDropObjects.IndexOf(senderDDObj)].Location.Y);
for (int i = dragDropObjects.IndexOf(senderDDObj) + 1; i < dragDropObjects.Count(); i++)
{
dragDropObjects[i].UpdateLocation(dragDropObjects[i - 1]);
}
this.Controls.Remove(senderDDObj);
dragDropObjects.Remove(senderDDObj);
}
protected override void OnDragDrop(DragEventArgs drgevent)
{
if (Int32.TryParse(drgevent.Data.GetData(DataFormats.Text).ToString(), out int newDDObjectType))
{
if (newDDObjectType > 2)
{
return;
}
}
else
{
return;
}
Point newObjLocation = this.PointToClient(new Point(drgevent.X, drgevent.Y));
Size newObjSize = new Size(50, 50);
DragDropObject newDDObject = GetDragDropItem(newDDObjectType, newObjLocation, newObjSize);
this.Controls.Add(newDDObject);
dragDropObjects.Add(newDDObject);
Invalidate();
}
// Method to generate new DragDrop elemnts
public DragDropObject GetDragDropItem(int type, Point location, Size size)
{
DragDropObject newDDObject = new DragDropObject();
switch (type)
{
case (1):
newDDObject = new BasicSectionDragDropObject(this);
break;
case (2):
newDDObject = new BasicConditionDragDropObject(this);
break;
default:
newDDObject = new DragDropObject();
break;
}
newDDObject.Location = location;
newDDObject.Size = size;
return(newDDObject);
}
// Method to add colors to the pallete
public void AddElementType(DragDropObject ddobj)
{
dragDropObjects.Add(ddobj);
Invalidate();
}