/// <summary>
/// Respond to a canvas item component being selected. ComponentID is the ID
/// of the actual component under the mouse cursor.
/// </summary>
/// <param name="item">The item that raised this select</param>
/// <param name="component">The component selected</param>
internal void HandleSelect(CanvasItem item, CanvasElementBase component)
{
if (component == null || component.ID == ActionID.None)
{
if (AllowSelection)
{
Focus();
int selectedItem = Controls.IndexOf(item);
if (selectedItem != _selectedItemIndex)
{
SelectItem(selectedItem, true);
}
}
}
if (CanvasItemAction != null)
{
CanvasItemAction(this, new CanvasItemArgs
{
Item = (component != null) ? component.ID : ActionID.None,
Tag = (component != null) ? component.Tag : null,
Control = item
});
}
}
/// <summary>
/// Handle mouse hover over an item to display a tooltip.
/// </summary>
protected override void OnMouseHover(EventArgs e)
{
base.OnMouseHover(e);
CanvasElementBase item = CanvasItemLayout.ItemFromPosition(_lastMousePosition);
if (item != null && item.HasToolTip)
{
_tooltip.Show(item.ToolTipString, this, _lastMousePosition.X + 16, _lastMousePosition.Y, 2500);
}
}
/// <summary>
/// Handle mouse movement to set the cursor.
/// </summary>
protected override void OnMouseMove(MouseEventArgs e)
{
if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
{
if (_dragBoxFromMouseDown != Rectangle.Empty && !_dragBoxFromMouseDown.Contains(e.X, e.Y))
{
// OK - it is definitely a drag so handle it as such.
DoDragDrop(this, DragDropEffects.All | DragDropEffects.Link);
return;
}
}
base.OnMouseMove(e);
CanvasElementBase item = CanvasItemLayout.ItemFromPosition(e.Location);
Cursor = (item != null && item.ID != ActionID.None) ? Cursors.Hand : Cursors.Default;
_lastMousePosition = e.Location;
}
/// <summary>
/// Raises an event on a component in the canvas item. The event is passed up to the
/// parent canvas to notify the owner.
/// </summary>
/// <param name="item">The item that raised the event</param>
public void RaiseEvent(CanvasElementBase item)
{
_view.HandleSelect(this, item);
}
/// <summary>
/// Respond to a canvas item component being selected. ComponentID is the ID
/// of the actual component under the mouse cursor.
/// </summary>
/// <param name="item">The item that raised this select</param>
/// <param name="component">The component selected</param>
internal void HandleSelect(CanvasItem item, CanvasElementBase component)
{
if (component == null || component.ID == ActionID.None)
{
if (AllowSelection)
{
Focus();
int selectedItem = Controls.IndexOf(item);
if (selectedItem != _selectedItemIndex)
{
SelectItem(selectedItem, true);
}
}
}
if (CanvasItemAction != null)
{
CanvasItemAction(this, new CanvasItemArgs
{
Item = (component != null) ? component.ID : ActionID.None,
Tag = (component != null) ? component.Tag : null,
Control = item
});
}
}
/// <summary>
/// Add a new component and advance forward on the current line.
/// </summary>
public void Add(CanvasElementBase newElement)
{
_components.Add(newElement);
newElement.Add(this, _clientBounds, Position);
Forward(newElement.Width, newElement.Height);
}
/// <summary>
/// Raises an event on a component in the canvas item. The event is passed up to the
/// parent canvas to notify the owner.
/// </summary>
/// <param name="item">The item that raised the event</param>
public void RaiseEvent(CanvasElementBase item)
{
_view.HandleSelect(this, item);
}
/// <summary>
/// Add a new component and advance forward on the current line.
/// </summary>
public void Add(CanvasElementBase newElement)
{
_components.Add(newElement);
newElement.Add(this, _clientBounds, Position);
Forward(newElement.Width, newElement.Height);
}
