private void InitControl()
{
// add droptargets to wrappanel
DropTarget dropTarget1 = new DropTarget() {Ghost = new DropTargetGhost(), ShowHover=false
, Width = 100, Height = 100};
DropTarget dropTarget2 = new DropTarget() { Ghost = new DropTargetGhost(), ShowHover=false
, Width = 100, Height = 100};
DropTarget dropTarget3 = new DropTarget() { Ghost = new DropTargetGhost(), ShowHover=false
, Width = 100, Height = 100};
DropTarget dropTarget4 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100};
DropTarget dropTarget5 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100};
DropTarget dropTarget6 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100};
PanelDropTargets.Children.Add(dropTarget1);
PanelDropTargets.Children.Add(dropTarget2);
PanelDropTargets.Children.Add(dropTarget3);
PanelDragSources.Children.Add(dropTarget4);
PanelDragSources.Children.Add(dropTarget5);
PanelDragSources.Children.Add(dropTarget6);
// create list of droptargets to pass to the dragsources
List<DropTarget> dropTargets = new List<DropTarget>() { dropTarget1, dropTarget2, dropTarget3,
dropTarget4, dropTarget5, dropTarget6};
// add dragsources to wrappanel
DragSource dragSource1 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "1" } },
Ghost = new DragSourceGhost(),
ShowReturnToOriginalPositionAnimation = false,
DropTargets = dropTargets
};
DragSource dragSource2 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "2" } },
Ghost = new DragSourceGhost(),
ShowReturnToOriginalPositionAnimation = false,
DropTargets = dropTargets
};
DragSource dragSource3 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "3" } },
Ghost = new DragSourceGhost(),
ShowReturnToOriginalPositionAnimation = false,
DropTargets = dropTargets
};
// add dragsources as content to droptargets
dropTarget4.Content = dragSource1;
dropTarget5.Content = dragSource2;
dropTarget6.Content = dragSource3;
}
internal void TriggerInternalDragSourceDropped(DragSource source)
{
// Fire the drop target entered event
if (InternalDragSourceDropped != null)
{
this.InternalDragSourceDropped(this, new DropEventArgs(source));
}
}
internal void TriggerDropTargetLeft(DragSource source)
{
// Fire the drop target left event
if (DropTargetLeft != null)
{
this.DropTargetLeft(this, new DropEventArgs(source));
}
}
internal void TriggerDragSourceDropped(DragSource source)
{
// double-check: remove all borders
source.RemoveAllDropBorders();
// Fire the drop target entered event
if (DragSourceDropped != null)
{
this.DragSourceDropped(this, new DropEventArgs(source));
}
}
/// <summary>
/// Method overrides OnApplyTemplate to add handlers / get references to control in the template
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
// all our controls are inside of a canvas control. Because of this, it doesn't
// automatically resize. We need to make sure the parent control is resized properly
// get the main control host
MainControlHost = (Grid)this.GetTemplateChild("MainControlHost");
// get the ghost control host
GhostContentControl = (Grid)this.GetTemplateChild("GhostContentControl");
// get the main content host
MainContentControl = (Grid)this.GetTemplateChild("MainContentControl");
// add the content
if (plstContent.Children.Count > 0)
{
DragSource tmp = (DragSource)plstContent.Children[0];
plstContent.Children.Remove(tmp);
Content = tmp;
//ResetContent();
}
// add the ghost?
if (GhostVisibility == Visibility.Visible)
{
if (Ghost != null)
{
GhostContentControl.Children.Clear();
GhostContentControl.Children.Add(Ghost);
}
}
// get bounding border for hover-effects
BoundingBorder = (Border)this.GetTemplateChild("BoundingBorder");
// add handler for droptargetentered
DropTargetEntered += new DropEventHandler(DropTargetBase_DropTargetEntered);
// add handler for droptargetleft
DropTargetLeft += new DropEventHandler(DropTargetBase_DropTargetLeft);
// add handler for dragsourcedropped
//DragSourceDropped += new DropEventHandler(DropTargetBase_DragSourceDropped);
InternalDragSourceDropped += new DropEventHandler(DropTargetBase_InternalDragSourceDropped);
if (AllowPositionSave)
{
(Application.Current.RootVisual as FrameworkElement).SizeChanged += new SizeChangedEventHandler(DropTarget_SizeChanged);
}
}
private void InitControls()
{
//Important
//see:http://silverlightdragdrop.codeplex.com/Thread/View.aspx?ThreadId=72180
SL_Drag_Drop_BaseClasses.InitialValues.ContainingLayoutPanel = this.LayoutRoot;
var target1 = new DropTarget() { Ghost = new DropTargetContentGhost(), Width = 100, Height = 50 };
var target2 = new DropTarget() { Ghost = new DropTargetContentGhost(), Width = 100, Height = 50 };
var target3 = new DropTarget() { Ghost = new DropTargetContentGhost(), Width = 100, Height = 50 };
var target4 = new DropTarget() { Ghost = new DropTargetContentGhost(), Width = 100, Height = 50 };
var target5 = new DropTarget() { Ghost = new DropTargetContentGhost(), Width = 100, Height = 50 };
var target6 = new DropTarget() { Ghost = new DropTargetContentGhost(), Width = 100, Height = 50 };
PanelDropTargets.Children.Add(target1);
PanelDropTargets.Children.Add(target2);
PanelDropTargets.Children.Add(target3);
PanelDragSources.Children.Add(target4);
PanelDragSources.Children.Add(target5);
PanelDragSources.Children.Add(target6);
var targets = new List<DropTarget> { target1, target2, target3, target4, target5, target6 };
//create objects you want to drag...
var dragSource1 = new DragSource
{
Content = new DragSourceContent { DataContext = new TextLabel { LabelText = "label1" } },
DropTargets = targets,
Ghost = new DragSourceContentGhost(),
DragHandleMode = DragSource.DragHandleModeType.FullDragSource,
};
var dragSource2 = new DragSource
{
Content = new DragSourceContent { DataContext = new TextLabel { LabelText = "label2" } },
DropTargets = targets,
Ghost = new DragSourceContentGhost(),
DragHandleMode = DragSource.DragHandleModeType.FullDragSource
};
var dragSource3 = new DragSource
{
Content = new DragSourceContent { DataContext = new TextLabel { LabelText = "label3" } },
DropTargets = targets,
Ghost = new DragSourceContentGhost(),
DragHandleMode = DragSource.DragHandleModeType.FullDragSource
};
target1.Content = dragSource1;
target2.Content = dragSource2;
target3.Content = dragSource3;
}
private void InitControl()
{
// add droptargets to wrappanel
DropTarget dropTarget1 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100, RemoveElementDropBehaviour= RemoveElementDropBehaviour.Replace };
DropTarget dropTarget2 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100, RemoveElementDropBehaviour = RemoveElementDropBehaviour.Replace };
DropTarget dropTarget3 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100, RemoveElementDropBehaviour = RemoveElementDropBehaviour.Replace };
PanelDropTargets.Children.Add(dropTarget1);
PanelDropTargets.Children.Add(dropTarget2);
PanelDropTargets.Children.Add(dropTarget3);
// create list of droptargets to pass to the dragsources
List<DropTarget> dropTargets = new List<DropTarget>() { dropTarget1, dropTarget2, dropTarget3 };
// add dragsources to wrappanel
DragSource dragSource1 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "1" } },
DropTargets = dropTargets
};
DragSource dragSource2 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "2" } },
DropTargets = dropTargets
};
DragSource dragSource3 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "3" } },
DropTargets = dropTargets
};
// add dragsources to wrappanel
PanelDragSources.Children.Add(dragSource1);
PanelDragSources.Children.Add(dragSource2);
PanelDragSources.Children.Add(dragSource3);
}
/// <summary>
/// Handles the dropping of a dragsource in this droptarget
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
void DropTargetBase_InternalDragSourceDropped(object sender, DropEventArgs args)
{
if (ShowHover)
{
// after this, start the hover-out animation on the droptarget
Animation.CreateDropTargetHoverOut(BoundingBorder).Begin();
}
// what if there are children?
if (MainContentControl.Children.Count > 0)
{
// get the current child (which is a dragsource by definition)
// and either switch it with the new child (if the parent of the new child
// is a valid droptarget for the current child - so it must have rights to
// be used as a droptarget to be able to make the switch!) or replace it
DragSource currentChild = (DragSource)MainContentControl.Children[0];
// if currentchild <> child you're dragging (else, we're just dropping our
// dragsource onto its own parent (droptarget)
if (currentChild != args.DragSource)
{
// is the new childs' parent (parent of parent of parent) a droptarget?
Panel firstParent = (Panel)VisualTreeHelper.GetParent(VisualTreeHelper.GetParent(args.DragSource));
if (firstParent != null)
{
// droptarget?
if (VisualTreeHelper.GetParent(firstParent) is DropTarget)
{
DropTarget newChildParentDropTarget = (DropTarget)VisualTreeHelper.GetParent(firstParent);
if (currentChild.DropTargets.Contains(newChildParentDropTarget) ||
currentChild.AllDropTargetsValid == true) // check for valid droptarget, or check if all droptargets are valid
{
// point needed for animation of the current child
Point from = new Point();
from = args.DragSource.getCurrentPosition();
// reset position of dragsource, so control is on top of ghost, right
// before actually moving it.
args.DragSource.ResetMyPosition();
// remove from current parent
((Panel)VisualTreeHelper.GetParent(args.DragSource)).Children.Remove(args.DragSource);
MainContentControl.Children.Clear();
MainContentControl.Children.Add(args.DragSource);
// move the current child, with or without an animation
if (currentChild.ShowSwitchReplaceAnimation)
{
// animation, from the current position to the new position
// current position = where the new child is now
// new position = where the new child was
// add the current child to its new position, then move it from the
// "current position" to 0, 0 (the new position)
newChildParentDropTarget.MainContentControl.Children.Add(currentChild);
//currentChild.AnimateOnSwitch(from);
Storyboard sb = currentChild.ReturnAnimateOnSwitch(from);
EventHandler handler = null;
handler = (send, arg) =>
{
sb.Completed -= handler;
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
};
sb.Completed += handler;
sb.Begin();
}
else
{
// no animation
newChildParentDropTarget.MainContentControl.Children.Add(currentChild);
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
}
else
{
// parent of the new child isn't a VALID droptarget. Depending on DropBehaviour, remove
// current child & set new one (replace-behaviour) or return the new child to
// its original position (disallow-behaviour)
if (RemoveElementDropBehaviour == RemoveElementDropBehaviour.Replace)
{
// reset position of dragsource, so control is on top of ghost, right
// before actually moving it.
args.DragSource.ResetMyPosition();
// remove from current parent
((Panel)VisualTreeHelper.GetParent(args.DragSource)).Children.Remove(args.DragSource);
MainContentControl.Children.Clear();
MainContentControl.Children.Add(args.DragSource);
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
else
{
// drop is disallowed, return dragsource to original position
args.DragSource.ReturnToOriginalPosition();
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
}
}
else
{
// parent of the new child isn't a droptarget. Depending on DropBehaviour, remove
// current child & set new one (replace-behaviour) or return the new child to
// its original position (disallow-behaviour)
if (RemoveElementDropBehaviour == RemoveElementDropBehaviour.Replace)
{
// reset position of dragsource, so control is on top of ghost, right
// before actually moving it.
args.DragSource.ResetMyPosition();
// remove from current parent
((Panel)VisualTreeHelper.GetParent(args.DragSource)).Children.Remove(args.DragSource);
MainContentControl.Children.Clear();
MainContentControl.Children.Add(args.DragSource);
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
else
{
// drop is disallowed, return dragsource to original position
args.DragSource.ReturnToOriginalPosition();
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
}
}
else
{
// reset position of dragsource, so control is on top of ghost, right
// before actually moving it.
args.DragSource.ResetMyPosition();
// remove from current parent
((Panel)VisualTreeHelper.GetParent(args.DragSource)).Children.Remove(args.DragSource);
MainContentControl.Children.Clear();
MainContentControl.Children.Add(args.DragSource);
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
}
else
{
// reset position of dragsource, so control is on top of ghost, right
// before actually moving it.
args.DragSource.ResetMyPosition();
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
}
else
{
// reset position of dragsource, so control is on top of ghost, right
// before actually moving it.
args.DragSource.ResetMyPosition();
// remove from current parent
((Panel)VisualTreeHelper.GetParent(args.DragSource)).Children.Remove(args.DragSource);
MainContentControl.Children.Clear();
MainContentControl.Children.Add(args.DragSource);
((DropTarget)VisualTreeHelper.GetParent((Panel)VisualTreeHelper.GetParent(VisualTreeHelper.GetParent(args.DragSource)))).Content = null;
this.Content = args.DragSource;
// trigger external dragsourcedropped-event
TriggerDragSourceDropped(args.DragSource);
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="source"></param>
public DropEventArgs(DragSource source)
{
DragSource = source;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="source"></param>
public DropEventArgs(DragSource source)
{
DragSource = source;
}
private void InitControl()
{
// add droptargets to wrappanel
// droptarget 1 has no visible ghost
// if that is the case, we must add a width & height. Default = auto,
// so if we leave it at that it will have 0 width/height
DropTarget dropTarget1 = new DropTarget()
{
Ghost = new DropTargetGhost(),
GhostVisibility = Visibility.Collapsed,
Width = 100,
Height = 100
};
DropTarget dropTarget2 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100};
DropTarget dropTarget3 = new DropTarget() { Ghost = new DropTargetGhost()
, Width = 100, Height = 100};
PanelDropTargets.Children.Add(dropTarget1);
PanelDropTargets.Children.Add(dropTarget2);
PanelDropTargets.Children.Add(dropTarget3);
// create list of droptargets to pass to the dragsources
List<DropTarget> dropTargets = new List<DropTarget>() { dropTarget1, dropTarget2, dropTarget3 };
// add dragsources to wrappanel
DragSource dragSource1 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "1" } },
Ghost = new DragSourceGhost(),
DropTargets = dropTargets
};
DragSource dragSource2 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "2" } },
//Ghost = new DragSourceGhost(),
DropTargets = dropTargets
};
List<DropTarget> dropTargetsThird = new List<DropTarget>() { dropTarget1, dropTarget2 };
// dragsource 3 cannot be dropped in droptarget 3
// dragsource 3 has no visible ghost. We can set width/height if needed, but in this case,
// it will take the widht/height of the Content (= DragSource)
DragSource dragSource3 = new DragSource()
{
Content = new DragSourceContent() { DataContext = new Dummy() { DummyText = "3" } },
Ghost = new DragSourceGhost(),
GhostVisibility = Visibility.Collapsed,
DropTargets = dropTargetsThird
};
// add dragsources to wrappanel
PanelDragSources.Children.Add(dragSource1);
PanelDragSources.Children.Add(dragSource2);
PanelDragSources.Children.Add(dragSource3);
}
internal void TriggerInternalDragSourceDropped(DragSource source)
{
// Fire the drop target entered event
if (InternalDragSourceDropped != null)
{
this.InternalDragSourceDropped(this, new DropEventArgs(source));
}
}
internal void TriggerDropTargetLeft(DragSource source)
{
// Fire the drop target left event
if (DropTargetLeft != null)
{
this.DropTargetLeft(this, new DropEventArgs(source));
}
}
internal void TriggerDragSourceDropped(DragSource source)
{
// double-check: remove all borders
source.RemoveAllDropBorders();
// Fire the drop target dropped event
if (DragSourceDropped != null)
{
this.DragSourceDropped(this, new DropEventArgs(source));
}
}