/// <summary>
/// Is this target a match for the provided screen position.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if a match; otherwise false.</returns>
public override bool IsMatch(Point screenPt, PageDragEndData dragEndData)
{
// First time around...
if (_visibleNotDraggedPages == -1)
{
// If pages are being dragged from this cell
if (dragEndData.Navigator == _cell)
{
// Create list of all the visible pages in the cell
KryptonPageCollection visiblePages = new KryptonPageCollection();
foreach (KryptonPage page in _cell.Pages)
if (page.LastVisibleSet)
visiblePages.Add(page);
// Remove all those that are being dragged
foreach (KryptonPage page in dragEndData.Pages)
visiblePages.Remove(page);
// Cache number of visible pages in target that are not part of the dragging set
_visibleNotDraggedPages = visiblePages.Count;
}
else
{
// Pages not coming from this cell so we always allow the cell edge targets
_visibleNotDraggedPages = int.MaxValue;
}
}
// If the drop leaves at least 1 page in the navigator then allow drag to edge
if (_visibleNotDraggedPages >= 1)
return base.IsMatch(screenPt, dragEndData);
else
return false;
}
private void EndDragging()
{
_dragPalette = null;
_dragRenderer = null;
_pageDragEndData = null;
_dragging = false;
}
/// <summary>
/// Process the drag pages in the context of a target navigator.
/// </summary>
/// <param name="target">Target navigator instance.</param>
/// <param name="data">Dragged page data.</param>
/// <returns>Last page to be transferred.</returns>
protected KryptonPage ProcessDragEndData(KryptonNavigator target,
PageDragEndData data)
{
KryptonPage ret = null;
// Add each source page to the target
foreach (KryptonPage page in data.Pages)
{
// Only add the page if one of the allow flags is set
if ((page.Flags & (int)AllowFlags) != 0)
{
// Use event to allow decision on if the page should be dropped
// (or even swap the page for a different page to be dropped)
PageDropEventArgs e = new PageDropEventArgs(page);
target.OnPageDrop(e);
if (!e.Cancel && (e.Page != null))
{
target.Pages.Add(e.Page);
ret = e.Page;
}
}
}
return(ret);
}
/// <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 our navigator instance
KryptonPage page = ProcessDragEndData(_navigator, data);
// Make the last page transfer the newly selected page of the navigator
if (page != null)
{
// If the navigator is allowed to have a selected page then select it
if (_navigator.AllowTabSelect)
{
_navigator.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
_navigator.PerformLayout();
if (!_navigator.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();
_navigator.Select();
}
}
return(true);
}
/// <summary>
/// Add a list of drag targets from the provided interface.
/// </summary>
/// <param name="provider">Interface reference.</param>
/// <param name="dragEndData">Pages data being dragged.</param>
public void AddRange(IDragTargetProvider provider, PageDragEndData dragEndData)
{
DragTargetList targets = provider?.GenerateDragTargets(dragEndData);
if ((targets != null) && (targets.Count > 0))
{
AddRange(targets);
}
}
/// <summary>
/// Generate a list of drag targets that are relevant to the provided end data.
/// </summary>
/// <param name="dragEndData">Pages data being dragged.</param>
/// <returns>List of drag targets.</returns>
public DragTargetList GenerateDragTargets(PageDragEndData dragEndData)
{
DragTargetList targets = new DragTargetList();
// Generate the set of targets from the element hierarchy
_manager.PropogateDragTargets(_floatingWindow, dragEndData, targets);
// Must have at least one target
if (targets.Count == 0)
targets.Add(new DragTargetNull());
return targets;
}
/// <summary>
/// Find the target the first matches the provided screen point.
/// </summary>
/// <param name="screenPt">Point in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>First target that matches; otherwise null.</returns>
protected virtual DragTarget FindTarget(Point screenPt, PageDragEndData dragEndData)
{
// Ask each target in turn if they are a match for the given screen point
foreach (DragTarget target in DragTargets)
{
if (target.IsMatch(screenPt, dragEndData))
{
return(target);
}
}
// Nothing matches
return(null);
}
/// <summary>
/// Called to initialize the implementation when dragging starts.
/// </summary>
/// <param name="paletteDragDrop">Drawing palette.</param>
/// <param name="renderer">Drawing renderer.</param>
/// <param name="pageDragEndData">Drag data associated with drag operation.</param>
/// <param name="dragTargets">List of all drag targets.</param>
public virtual void Start(IPaletteDragDrop paletteDragDrop,
IRenderer renderer,
PageDragEndData pageDragEndData,
DragTargetList dragTargets)
{
Debug.Assert(paletteDragDrop != null);
Debug.Assert(renderer != null);
Debug.Assert(pageDragEndData != null);
Debug.Assert(dragTargets != null);
_paletteDragDrop = paletteDragDrop;
_renderer = renderer;
_pageDragEndData = pageDragEndData;
_dragTargets = dragTargets;
}
/// <summary>
/// Release unmanaged and optionally managed resources.
/// </summary>
/// <param name="disposing">Called from Dispose method.</param>
protected virtual void Dispose(bool disposing)
{
// If called from explicit call to Dispose
if (disposing)
{
// No need to call destructor once dispose has occured
GC.SuppressFinalize(this);
_pageDragEndData = null;
_dragTargets = null;
}
// Mark as disposed
_disposed = true;
}
/// <summary>
/// Occurs when dragging starts.
/// </summary>
/// <param name="screenPt">Mouse screen point at start of drag.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if dragging waas started; otherwise false.</returns>
public virtual bool DragStart(Point screenPt, PageDragEndData dragEndData)
{
if (IsDisposed)
{
throw new InvalidOperationException("Cannot DragStart when instance have been disposed.");
}
if (IsDragging)
{
throw new InvalidOperationException("Cannot DragStart when already performing dragging operation.");
}
if (dragEndData == null)
{
throw new ArgumentNullException("Cannot provide an empty DragEndData.");
}
// Generate drag targets from the set of target provides
ClearTargets();
foreach (IDragTargetProvider provider in DragTargetProviders)
{
_dragTargets.AddRange(provider, dragEndData);
}
// We only drag if we have at least one page and one target
_dragging = ((_dragTargets.Count > 0) && (dragEndData.Pages.Count > 0));
// Do we really need to start dragging?
if (_dragging)
{
// We cache the palette/renderer at start of drag and use the same ones for the
// whole duration of the drag as changing drawing info during drag would be hard!
ResolvePaletteRenderer();
// Cache page data for duration of dragging operation
_pageDragEndData = dragEndData;
// Create correct drag feedback class and start it up
ResolveDragFeedback();
_dragFeedback.Start(_stateCommon, _dragRenderer, _pageDragEndData, _dragTargets);
}
else
{
ClearTargets();
}
return(_dragging);
}
/// <summary>
/// Called to initialize the implementation when dragging starts.
/// </summary>
/// <param name="paletteDragDrop">Drawing palette.</param>
/// <param name="renderer">Drawing renderer.</param>
/// <param name="pageDragEndData">Drag data associated with drag operation.</param>
/// <param name="dragTargets">List of all drag targets.</param>
public override void Start(IPaletteDragDrop paletteDragDrop,
IRenderer renderer,
PageDragEndData pageDragEndData,
DragTargetList dragTargets)
{
base.Start(paletteDragDrop, renderer, pageDragEndData, dragTargets);
if (_solid == null)
{
// Create and show a window without it taking focus
_solid = new DropSolidWindow(PaletteDragDrop, Renderer);
_solid.SetBounds(0, 0, 1, 1, BoundsSpecified.All);
_solid.ShowWithoutActivate();
_solid.Refresh();
}
}
/// <summary>
/// Called to initialize the implementation when dragging starts.
/// </summary>
/// <param name="paletteDragDrop">Drawing palette.</param>
/// <param name="renderer">Drawing renderer.</param>
/// <param name="pageDragEndData">Drag data associated with drag operation.</param>
/// <param name="dragTargets">List of all drag targets.</param>
public override void Start(IPaletteDragDrop paletteDragDrop,
IRenderer renderer,
PageDragEndData pageDragEndData,
DragTargetList dragTargets)
{
base.Start(paletteDragDrop, renderer, pageDragEndData, dragTargets);
if (_solid == null)
{
// Create and show a window without it taking focus
_solid = new DropSolidWindow(PaletteDragDrop, Renderer);
_solid.SetBounds(0, 0, 1, 1, BoundsSpecified.All);
_solid.ShowWithoutActivate();
_solid.Refresh();
}
}
/// <summary>
/// Is this target a match for the provided screen position.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if a match; otherwise false.</returns>
public override bool IsMatch(Point screenPt, PageDragEndData dragEndData)
{
// First time around...
if (_notDraggedPagesFromNavigator == -1)
{
// Search for any pages that are not from this navigator
_notDraggedPagesFromNavigator = 0;
foreach (KryptonPage page in dragEndData.Pages)
{
if (!_navigator.Pages.Contains(page))
{
_notDraggedPagesFromNavigator = 1;
break;
}
}
}
// If 1 or more pages are not from this navigator then allow transfer into the target
return(_notDraggedPagesFromNavigator > 0 && base.IsMatch(screenPt, dragEndData));
}
/// <summary>
/// Is this target a match for the provided screen position.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if a match; otherwise false.</returns>
public override bool IsMatch(Point screenPt, PageDragEndData dragEndData)
{
// First time around...
if (_notDraggedPagesFromNavigator == -1)
{
// Search for any pages that are not from this navigator
_notDraggedPagesFromNavigator = 0;
foreach (KryptonPage page in dragEndData.Pages)
if (!_navigator.Pages.Contains(page))
{
_notDraggedPagesFromNavigator = 1;
break;
}
}
// If 1 or more pages are not from this navigator then allow transfer into the target
if (_notDraggedPagesFromNavigator > 0)
return base.IsMatch(screenPt, dragEndData);
else
return false;
}
/// <summary>
/// Called to initialize the implementation when dragging starts.
/// </summary>
/// <param name="paletteDragDrop">Drawing palette.</param>
/// <param name="renderer">Drawing renderer.</param>
/// <param name="pageDragEndData">Drag data associated with drag operation.</param>
/// <param name="dragTargets">List of all drag targets.</param>
public override void Start(IPaletteDragDrop paletteDragDrop,
IRenderer renderer,
PageDragEndData pageDragEndData,
DragTargetList dragTargets)
{
base.Start(paletteDragDrop, renderer, pageDragEndData, dragTargets);
if (_solid == null)
{
// Create and show a solid feedback window without it taking focus
_solid = new DropSolidWindow(PaletteDragDrop, Renderer);
_solid.SetBounds(0, 0, 1, 1, BoundsSpecified.All);
_solid.ShowWithoutActivate();
_solid.Refresh();
}
ClearClusters();
// Create clusters of related drag targets
foreach (DragTarget target in dragTargets)
{
// Check if the target is actually able to drop inside itself
if (target.IsMatch(target.HotRect.Location, pageDragEndData))
{
// Find the existing cluster for the targets screen rectangle
DockCluster cluster = FindTargetCluster(target);
// Is the target allowed to be added to the found cluster (if there is one found)
if ((cluster == null) || cluster.ExcludeCluster || ((target.Hint & DragTargetHint.ExcludeCluster) == DragTargetHint.ExcludeCluster))
{
_clusters.Add(new DockCluster(PaletteDragDrop, Renderer, target));
}
else
{
cluster.Add(target);
}
}
}
}
/// <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)
{
// Find our docking edge
KryptonDockingEdge dockingEdge = null;
switch (Edge)
{
case VisualOrientation.Left:
dockingEdge = ControlElement["Left"] as KryptonDockingEdge;
break;
case VisualOrientation.Right:
dockingEdge = ControlElement["Right"] as KryptonDockingEdge;
break;
case VisualOrientation.Top:
dockingEdge = ControlElement["Top"] as KryptonDockingEdge;
break;
case VisualOrientation.Bottom:
dockingEdge = ControlElement["Bottom"] as KryptonDockingEdge;
break;
}
if (dockingEdge != null)
{
// Find the docked edge
KryptonDockingEdgeDocked dockedEdge = dockingEdge["Docked"] as KryptonDockingEdgeDocked;
if (dockingEdge != null)
{
KryptonDockingManager manager = dockedEdge.DockingManager;
if (manager != null)
{
// Create a list of pages that are allowed to be transferred into the dockspace
List<KryptonPage> transferPages = new List<KryptonPage>();
List<string> transferUniqueNames = new List<string>();
foreach (KryptonPage page in data.Pages)
if (page.AreFlagsSet(KryptonPageFlags.DockingAllowDocked))
{
// Use event to indicate the page is becoming docked and allow it to be cancelled
CancelUniqueNameEventArgs args = new CancelUniqueNameEventArgs(page.UniqueName, false);
manager.RaisePageDockedRequest(args);
if (!args.Cancel)
{
transferPages.Add(page);
transferUniqueNames.Add(page.UniqueName);
}
}
// Transfer valid pages into the new dockspace
if (transferPages.Count > 0)
{
// Convert the incoming pages into store pages for restoring later
manager.PropogateAction(DockingPropogateAction.StorePages, transferUniqueNames.ToArray());
// Create a new dockspace at the start of the list so it is closest to the control edge
KryptonDockingDockspace dockspace = (_outsideEdge ? dockedEdge.InsertDockspace(0) : dockedEdge.AppendDockspace());
// Add pages into the target
dockspace.Append(transferPages.ToArray());
return true;
}
}
}
}
return false;
}
/// <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)
{
return true;
}
/// <summary>
/// Process the drag pages in the context of a target navigator.
/// </summary>
/// <param name="workspace">Target workspace instance.</param>
/// <param name="target">Target workspace cell instance.</param>
/// <param name="data">Dragged page data.</param>
/// <returns>Last page to be transferred.</returns>
protected KryptonPage ProcessDragEndData(KryptonWorkspace workspace,
KryptonWorkspaceCell target,
PageDragEndData data)
{
KryptonPage ret = null;
// Add each source page to the target
foreach (KryptonPage page in data.Pages)
{
// Only add the page if one of the allow flags is set
if ((page.Flags & (int)AllowFlags) != 0)
{
// Use event to allow decision on if the page should be dropped
// (or even swap the page for a different page to be dropped)
PageDropEventArgs e = new PageDropEventArgs(page);
workspace.OnPageDrop(e);
if (!e.Cancel && (e.Page != null))
{
target.Pages.Add(e.Page);
ret = e.Page;
}
}
}
return ret;
}
/// <summary>
/// Is this target a match for the provided screen position.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if a match; otherwise false.</returns>
public override bool IsMatch(Point screenPt, PageDragEndData dragEndData)
{
return true;
}
/// <summary>
/// Find the target the first matches the provided screen point.
/// </summary>
/// <param name="screenPt">Point in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>First target that matches; otherwise null.</returns>
protected virtual DragTarget FindTarget(Point screenPt, PageDragEndData dragEndData)
{
// Ask each target in turn if they are a match for the given screen point
foreach (DragTarget target in DragTargets)
if (target.IsMatch(screenPt, dragEndData))
return target;
// Nothing matches
return null;
}
/// <summary>
/// Propogates a request for drag targets down the hierarchy of docking elements.
/// </summary>
/// <param name="floatingWindow">Reference to window being dragged.</param>
/// <param name="dragData">Set of pages being dragged.</param>
/// <param name="targets">Collection of drag targets.</param>
public override void PropogateDragTargets(KryptonFloatingWindow floatingWindow,
PageDragEndData dragData,
DragTargetList targets)
{
if (DockspaceControl.CellVisibleCount > 0)
{
// Create list of the pages that are allowed to be dropped into this dockspace
KryptonPageCollection pages = new KryptonPageCollection();
foreach (KryptonPage page in dragData.Pages)
if (page.AreFlagsSet(KryptonPageFlags.DockingAllowDocked))
pages.Add(page);
// Do we have any pages left for dragging?
if (pages.Count > 0)
{
DragTargetList dockspaceTargets = DockspaceControl.GenerateDragTargets(new PageDragEndData(this, pages), KryptonPageFlags.DockingAllowDocked);
targets.AddRange(dockspaceTargets.ToArray());
}
}
}
/// <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 the existing cell
KryptonPage page = ProcessDragEndData(Workspace, _cell, data);
// Make the last page transfer the newly selected page of the cell
if (page != null)
{
// Does the cell allow the selection of tabs?
if (_cell.AllowTabSelect)
_cell.SelectedPage = page;
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>
/// Release unmanaged and optionally managed resources.
/// </summary>
/// <param name="disposing">Called from Dispose method.</param>
protected virtual void Dispose(bool disposing)
{
// If called from explicit call to Dispose
if (disposing)
{
// No need to call destructor once dispose has occured
GC.SuppressFinalize(this);
_pageDragEndData = null;
_dragTargets = null;
}
// Mark as disposed
_disposed = true;
}
/// <summary>
/// Called to cleanup when dragging has finished.
/// </summary>
public virtual void Quit()
{
_pageDragEndData = null;
_dragTargets = null;
}
/// <summary>
/// Propogates a request for drag targets down the hierarchy of docking elements.
/// </summary>
/// <param name="floatingWindow">Reference to window being dragged.</param>
/// <param name="dragData">Set of pages being dragged.</param>
/// <param name="targets">Collection of drag targets.</param>
public override void PropogateDragTargets(KryptonFloatingWindow floatingWindow,
PageDragEndData dragData,
DragTargetList targets)
{
// Create a list of pages that are allowed to be transferred into a dockspace
List<KryptonPage> transferPages = new List<KryptonPage>();
foreach (KryptonPage page in dragData.Pages)
if (page.AreFlagsSet(KryptonPageFlags.DockingAllowDocked))
transferPages.Add(page);
// Only generate targets if we have some valid pages to transfer
if (transferPages.Count > 0)
{
// Generate targets for the four control edges
Rectangle screenRect = Control.RectangleToScreen(Control.ClientRectangle);
Rectangle[] rectsDraw = SubdivideRectangle(screenRect, 3, int.MaxValue);
Rectangle[] rectsHot = SubdivideRectangle(screenRect, 10, 20);
// Must insert at start of target list as they are higher priority than cell targets
targets.Add(new DragTargetControlEdge(screenRect, rectsHot[0], rectsDraw[0], DragTargetHint.EdgeLeft | DragTargetHint.ExcludeCluster, this, KryptonPageFlags.DockingAllowDocked, true));
targets.Add(new DragTargetControlEdge(screenRect, rectsHot[1], rectsDraw[1], DragTargetHint.EdgeRight | DragTargetHint.ExcludeCluster, this, KryptonPageFlags.DockingAllowDocked, true));
targets.Add(new DragTargetControlEdge(screenRect, rectsHot[2], rectsDraw[2], DragTargetHint.EdgeTop | DragTargetHint.ExcludeCluster, this, KryptonPageFlags.DockingAllowDocked, true));
targets.Add(new DragTargetControlEdge(screenRect, rectsHot[3], rectsDraw[3], DragTargetHint.EdgeBottom | DragTargetHint.ExcludeCluster, this, KryptonPageFlags.DockingAllowDocked, true));
// If we have no designated inner element when we have to decide if we can place edge drag drop targets based on the
// available space at the center of the control after taking into account any edge docked controls already in place.
if (_innerElement == null)
{
// Find the inner rectangle after taking docked controls into account
Size tl = Size.Empty;
Size br = Control.ClientSize;
foreach (Control c in Control.Controls)
if (c.Visible)
{
switch (c.Dock)
{
case DockStyle.Left:
tl.Width = Math.Max(tl.Width, c.Right);
break;
case DockStyle.Right:
br.Width = Math.Min(br.Width, c.Left);
break;
case DockStyle.Top:
tl.Height = Math.Max(tl.Height, c.Bottom);
break;
case DockStyle.Bottom:
br.Height = Math.Min(br.Height, c.Top);
break;
}
}
// If there is inner space available
Rectangle innerRect = new Rectangle(tl.Width, tl.Height, br.Width - tl.Width, br.Height - tl.Height);
if ((innerRect.Width > 0) && (innerRect.Height > 0))
{
Rectangle innerScreenRect = Control.RectangleToScreen(innerRect);
Rectangle[] innerRectsDraw = SubdivideRectangle(innerScreenRect, 3, int.MaxValue);
Rectangle[] innerRectsHot = SubdivideRectangle(innerScreenRect, 10, 20);
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[0], innerRectsDraw[0], DragTargetHint.EdgeLeft, this, KryptonPageFlags.DockingAllowDocked, false));
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[1], innerRectsDraw[1], DragTargetHint.EdgeRight, this, KryptonPageFlags.DockingAllowDocked, false));
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[2], innerRectsDraw[2], DragTargetHint.EdgeTop, this, KryptonPageFlags.DockingAllowDocked, false));
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[3], innerRectsDraw[3], DragTargetHint.EdgeBottom, this, KryptonPageFlags.DockingAllowDocked, false));
}
}
else if (_innerElement is KryptonDockingNavigator)
{
KryptonDockingNavigator dockingNavigator = (KryptonDockingNavigator)_innerElement;
// If there is inner space available
Rectangle innerScreenRect = dockingNavigator.DockableNavigatorControl.RectangleToScreen(dockingNavigator.DockableNavigatorControl.ClientRectangle);
if ((innerScreenRect.Width > 0) && (innerScreenRect.Height > 0))
{
Rectangle[] innerRectsDraw = SubdivideRectangle(innerScreenRect, 3, int.MaxValue);
Rectangle[] innerRectsHot = SubdivideRectangle(innerScreenRect, 10, 20);
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[0], innerRectsDraw[0], DragTargetHint.EdgeLeft, this, KryptonPageFlags.DockingAllowDocked, false));
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[1], innerRectsDraw[1], DragTargetHint.EdgeRight, this, KryptonPageFlags.DockingAllowDocked, false));
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[2], innerRectsDraw[2], DragTargetHint.EdgeTop, this, KryptonPageFlags.DockingAllowDocked, false));
targets.Add(new DragTargetControlEdge(innerScreenRect, innerRectsHot[3], innerRectsDraw[3], DragTargetHint.EdgeBottom, this, KryptonPageFlags.DockingAllowDocked, false));
}
}
// Let base class generate targets for contained elements
base.PropogateDragTargets(floatingWindow, dragData, targets);
}
}
/// <summary>
/// Is this target a match for the provided screen position.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if a match; otherwise false.</returns>
public virtual bool IsMatch(Point screenPt, PageDragEndData dragEndData)
{
// Default to matching if the mouse is inside the targets hot area
return(HotRect.Contains(screenPt));
}
/// <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>True if the drop was performed and the source can remove any pages.</returns>
public override bool PerformDrop(Point screenPt, PageDragEndData data)
{
// Create a node for each page
foreach (KryptonPage page in data.Pages)
{
// Create node and populate with page details
TreeNode node = new TreeNode();
node.Text = page.Text;
node.ImageIndex = int.Parse((string)page.Tag);
node.SelectedImageIndex = node.ImageIndex;
node.Tag = page.Tag;
// Add to end of root nodes
_treeView.Nodes.Add(node);
}
// Take focus and select the last node added
if (_treeView.Nodes.Count > 0)
{
_treeView.SelectedNode = _treeView.Nodes[_treeView.Nodes.Count - 1];
_treeView.Select();
}
return true;
}
/// <summary>
/// Is this target a match for the provided screen position.
/// </summary>
/// <param name="screenPt">Position in screen coordinates.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if a match; otherwise false.</returns>
public override bool IsMatch(Point screenPt, PageDragEndData dragEndData)
{
// Cannot drag back to ourself
if ((dragEndData.Source != null) &&
(dragEndData.Source is PageDragTreeView) &&
(dragEndData.Source == _treeView))
return false;
else
return base.IsMatch(screenPt, dragEndData);
}
/// <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
if (Workspace.Root.Orientation == Orientation.Horizontal)
Workspace.Root.Orientation = Orientation.Vertical;
else
Workspace.Root.Orientation = 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
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>
/// Propogates a request for drag targets down the hierarchy of docking elements.
/// </summary>
/// <param name="floatingWindow">Reference to window being dragged.</param>
/// <param name="dragData">Set of pages being dragged.</param>
/// <param name="targets">Collection of drag targets.</param>
public override void PropogateDragTargets(KryptonFloatingWindow floatingWindow,
PageDragEndData dragData,
DragTargetList targets)
{
// Can only generate targets for a floating window that is actually visible and not the one being dragged
if (FloatingWindow.Visible && (floatingWindow != FloatingWindow))
base.PropogateDragTargets(floatingWindow, dragData, targets);
}
/// <summary>
/// Generate a list of drag targets that are relevant to the provided end data.
/// </summary>
/// <param name="dragEndData">Pages data being dragged.</param>
/// <returns>List of drag targets.</returns>
public virtual DragTargetList GenerateDragTargets(PageDragEndData dragEndData)
{
return GenerateDragTargets(dragEndData, KryptonPageFlags.All);
}
/// <summary>
/// Called to initialize the implementation when dragging starts.
/// </summary>
/// <param name="paletteDragDrop">Drawing palette.</param>
/// <param name="renderer">Drawing renderer.</param>
/// <param name="pageDragEndData">Drag data associated with drag operation.</param>
/// <param name="dragTargets">List of all drag targets.</param>
public virtual void Start(IPaletteDragDrop paletteDragDrop,
IRenderer renderer,
PageDragEndData pageDragEndData,
DragTargetList dragTargets)
{
Debug.Assert(paletteDragDrop != null);
Debug.Assert(renderer != null);
Debug.Assert(pageDragEndData != null);
Debug.Assert(dragTargets != null);
_paletteDragDrop = paletteDragDrop;
_renderer = renderer;
_pageDragEndData = pageDragEndData;
_dragTargets = dragTargets;
}
/// <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 our navigator instance
KryptonPage page = ProcessDragEndData(_navigator, data);
// Make the last page transfer the newly selected page of the navigator
if (page != null)
{
// If the navigator is allowed to have a selected page then select it
if (_navigator.AllowTabSelect)
_navigator.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
_navigator.PerformLayout();
if (!_navigator.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();
_navigator.Select();
}
}
return true;
}
/// <summary>
/// Create the actual drop data based on the proposed data provided.
/// </summary>
/// <param name="dropData">Proposed drop data.</param>
/// <returns>Actual drop data</returns>
protected virtual PageDragEndData CreateDropData(PageDragEndData dropData)
{
return(dropData);
}
/// <summary>
/// Called to cleanup when dragging has finished.
/// </summary>
public virtual void Quit()
{
_pageDragEndData = null;
_dragTargets = null;
}
/// <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
KryptonWorkspaceSequence parent = Cell.WorkspaceParent as KryptonWorkspaceSequence;
if (parent != null)
{
// 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;
if (parent.Orientation == Orientation.Horizontal)
sequenceOrientation = Orientation.Vertical;
else
sequenceOrientation = 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 transfered 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>
/// Generate a list of drag targets that are relevant to the provided end data.
/// </summary>
/// <param name="dragEndData">Pages data being dragged.</param>
/// <returns>List of drag targets.</returns>
public DragTargetList GenerateDragTargets(PageDragEndData dragEndData)
{
DragTargetList targets = new DragTargetList();
// Generate target for the entire navigator client area
targets.Add(new DragTargetTreeViewTransfer(RectangleToScreen(ClientRectangle), this));
return targets;
}
/// <summary>
/// Generate a list of drag targets that are relevant to the provided end data.
/// </summary>
/// <param name="dragEndData">Pages data being dragged.</param>
/// <param name="allowFlags">Only drop pages that have one of these flags set.</param>
/// <returns>List of drag targets.</returns>
public virtual DragTargetList GenerateDragTargets(PageDragEndData dragEndData, KryptonPageFlags allowFlags)
{
DragTargetList targets = new DragTargetList();
// Generate target for the entire navigator client area
targets.Add(new DragTargetNavigatorTransfer(RectangleToScreen(ClientRectangle), this, allowFlags));
return targets;
}
/// <summary> /// Perform the drop action associated with the target. /// </summary> /// <param name="screenPt">Position in screen coordinates.</param> /// <param name="dragEndData">Data to be dropped at destination.</param> /// <returns>Drop was performed and the source can perform any removal of pages as required.</returns> public abstract bool PerformDrop(Point screenPt, PageDragEndData dragEndData);
/// <summary>
/// Propogates a request for drag targets down the hierarchy of docking elements.
/// </summary>
/// <param name="floatingWindow">Reference to window being dragged.</param>
/// <param name="dragData">Set of pages being dragged.</param>
/// <param name="targets">Collection of drag targets.</param>
public virtual void PropogateDragTargets(KryptonFloatingWindow floatingWindow,
PageDragEndData dragData,
DragTargetList targets)
{
// Propogate the request to all child elements
foreach (IDockingElement child in this)
child.PropogateDragTargets(floatingWindow, dragData, targets);
}
private DragTarget FindTarget(Point screenPt, PageDragEndData dragEndData)
{
// Nothing matches
return(null);
}
/// <summary>
/// Occurs when dragging starts.
/// </summary>
/// <param name="screenPt">Mouse screen point at start of drag.</param>
/// <param name="dragEndData">Data to be dropped at destination.</param>
/// <returns>True if dragging waas started; otherwise false.</returns>
public override bool DragStart(Point screenPt, PageDragEndData dragEndData)
{
if (FloatingWindow != null)
FloatingWindow.Capture = true;
AddFilter();
return base.DragStart(screenPt, dragEndData);
}
