/// <summary>
/// Occurs when the component is being removed from the designer.
/// </summary>
/// <param name="sender">Source of the event.</param>
/// <param name="e">A ComponentEventArgs containing event data.</param>
protected override void OnComponentRemoving(object sender, ComponentEventArgs e)
{
// If our control is being removed
if (e.Component == Navigator)
{
// If this workspace cell is inside a parent
KryptonWorkspaceCell cell = (KryptonWorkspaceCell)Navigator;
if (cell.WorkspaceParent != null)
{
// Cell an only be inside a workspace sequence
KryptonWorkspaceSequence sequence = (KryptonWorkspaceSequence)cell.WorkspaceParent;
if (sequence != null)
{
// Remove the cell from the parent
sequence.Children.Remove(cell);
}
}
}
base.OnComponentRemoving(sender, e);
}
private void CompactRemoveEmptyCells(CompactFlags flags)
{
if ((flags & CompactFlags.RemoveEmptyCells) == CompactFlags.RemoveEmptyCells)
{
// Search for child cell items
for (int i = Children.Count - 1; i >= 0; i--)
{
// If a cell and that cell does not have any pages
KryptonWorkspaceCell cell = Children[i] as KryptonWorkspaceCell;
if ((cell != null) && (cell.Pages.Count == 0))
{
Children.RemoveAt(i);
// If the cell is not inside a controls collection then we need to dispose of it here
// because the layout code will never try and dispose on remove from controls collection
// as it is not inside the controls collection
if ((cell.Parent == null) && (cell.DisposeOnRemove))
{
cell.Dispose();
}
}
}
}
}
/// <summary>
/// Initialize a new instance of the CellDragCancelEventArgs class.
/// </summary>
/// <param name="e">Event to upgrade to this event.</param>
/// <param name="cell">Workspace cell associated with pages.</param>
public CellDragCancelEventArgs(PageDragCancelEventArgs e,
KryptonWorkspaceCell cell)
: base(e.ScreenPoint, e.ElementOffset, e.Control, e.Pages)
{
Cell = cell;
}
/// <summary>
/// Perform the drop action associated with the target.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="data">Data to pass to the target to process drop.</param>
/// <returns>Drop was performed and the source can perform any removal of pages as required.</returns>
public override bool PerformDrop(Point screenPt, PageDragEndData data)
{
// We need a parent sequence in order to perform drop
if (Cell.WorkspaceParent is KryptonWorkspaceSequence parent)
{
// Transfer the dragged pages into a new cell
KryptonWorkspaceCell cell = new KryptonWorkspaceCell();
KryptonPage page = ProcessDragEndData(Workspace, cell, data);
// If no pages are transferred then we do nothing and no longer need cell instance
if (page == null)
{
cell.Dispose();
}
else
{
// If the parent sequence is not the same direction as that needed for the drop then...
bool dropHorizontal = (Edge == VisualOrientation.Left) || (Edge == VisualOrientation.Right);
if ((dropHorizontal && (parent.Orientation == Orientation.Vertical)) ||
(!dropHorizontal && (parent.Orientation == Orientation.Horizontal)))
{
// Find opposite direction to the parent sequence
Orientation sequenceOrientation = parent.Orientation == Orientation.Horizontal
? Orientation.Vertical
: Orientation.Horizontal;
// Create a new sequence and transfer the target cell into it
KryptonWorkspaceSequence sequence = new KryptonWorkspaceSequence(sequenceOrientation);
int index = parent.Children.IndexOf(Cell);
parent.Children.RemoveAt(index);
sequence.Children.Add(Cell);
// Put the sequence into the place where the target cell used to be
parent.Children.Insert(index, sequence);
// Add new cell to the start or the end of the new sequence?
if ((Edge == VisualOrientation.Left) || (Edge == VisualOrientation.Top))
{
sequence.Children.Insert(0, cell);
}
else
{
sequence.Children.Add(cell);
}
}
else
{
// Find position of the target cell
int index = parent.Children.IndexOf(Cell);
// Add new cell before or after the target cell?
if ((Edge == VisualOrientation.Left) || (Edge == VisualOrientation.Top))
{
parent.Children.Insert(index, cell);
}
else
{
parent.Children.Insert(index + 1, cell);
}
}
// Make the last page transferred the newly selected page of the cell
if (page != null)
{
// Does the cell allow the selection of tabs?
if (cell.AllowTabSelect)
{
cell.SelectedPage = page;
}
// Need to layout so the new cell has been added as a child control and
// therefore can receive the focus we want to give it immediately afterwards
Workspace.PerformLayout();
if (!cell.IsDisposed)
{
// Without this DoEvents() call the dropping of multiple pages in a complex arrangement causes an exception for
// a complex reason that is hard to work out (i.e. I'm not entirely sure). Something to do with using select to
// change activation is causing the source workspace control to dispose to earlier.
Application.DoEvents();
cell.Select();
}
}
}
}
return(true);
}
/// <summary>
/// Perform the drop action associated with the target.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="data">Data to pass to the target to process drop.</param>
/// <returns>Drop was performed and the source can perform any removal of pages as required.</returns>
public override bool PerformDrop(Point screenPt, PageDragEndData data)
{
// Transfer the dragged pages into a new cell
KryptonWorkspaceCell cell = new KryptonWorkspaceCell();
KryptonPage page = ProcessDragEndData(Workspace, cell, data);
// If no pages are transferred then we do nothing and no longer need cell instance
if (page == null)
{
cell.Dispose();
}
else
{
// If the root is not the same direction as that needed for the drop then...
bool dropHorizontal = (Edge == VisualOrientation.Left) || (Edge == VisualOrientation.Right);
if ((dropHorizontal && (Workspace.Root.Orientation == Orientation.Vertical)) ||
(!dropHorizontal && (Workspace.Root.Orientation == Orientation.Horizontal)))
{
// Create a new sequence and place all existing root items into it
KryptonWorkspaceSequence sequence = new KryptonWorkspaceSequence(Workspace.Root.Orientation);
for (int i = Workspace.Root.Children.Count - 1; i >= 0; i--)
{
Component child = Workspace.Root.Children[i];
Workspace.Root.Children.RemoveAt(i);
sequence.Children.Insert(0, child);
}
// Put the new sequence in the root so all items are now grouped together
Workspace.Root.Children.Add(sequence);
// Switch the direction of the root
Workspace.Root.Orientation = Workspace.Root.Orientation == Orientation.Horizontal
? Orientation.Vertical
: Orientation.Horizontal;
}
// Add to the start or the end of the root sequence?
if ((Edge == VisualOrientation.Left) || (Edge == VisualOrientation.Top))
{
Workspace.Root.Children.Insert(0, cell);
}
else
{
Workspace.Root.Children.Add(cell);
}
// Make the last page transfer the newly selected page of the cell
// Does the cell allow the selection of tabs?
if (cell.AllowTabSelect)
{
cell.SelectedPage = page;
}
// Need to layout so the new cell has been added as a child control and
// therefore can receive the focus we want to give it immediately afterwards
Workspace.PerformLayout();
if (!cell.IsDisposed)
{
// Without this DoEvents() call the dropping of multiple pages in a complex arrangement causes an exception for
// a complex reason that is hard to work out (i.e. I'm not entirely sure). Something to do with using select to
// change activation is causing the source workspace control to dispose to earlier.
Application.DoEvents();
cell.Select();
}
}
return(true);
}
/// <summary>
/// Initialize a new instance of the ActiveCellChangedEventArgs class.
/// </summary>
/// <param name="oldCell">Previous active cell value.</param>
/// <param name="newCell">New active cell value.</param>
public ActiveCellChangedEventArgs(KryptonWorkspaceCell oldCell,
KryptonWorkspaceCell newCell)
{
OldCell = oldCell;
NewCell = newCell;
}
/// <summary>
/// Initialize a new instance of the WorkspaceCellEventArgs class.
/// </summary>
/// <param name="cell">Workspace cell associated with the event.</param>
public WorkspaceCellEventArgs(KryptonWorkspaceCell cell)
{
Cell = cell;
}
