private void UpdateMatrixUI(MatrixLoc insertLoc, WidgetSiteDragDropData data)
{
List <SiteShiftInfo> relocatedSites;
relocatedSites = CalculateWhichSitesToShift(insertLoc, data);
var sitesToMove = relocatedSites.Except(_prevRelocatedSites, SiteShiftInfoComparer.Comparer).ToList();
var sitesToReverse = _prevRelocatedSites.Except(relocatedSites, SiteShiftInfoComparer.Comparer).ToList();
foreach (var s in sitesToMove)
{
AnimateSiteTranslate(s.site, s.translateX, s.translateY);
}
foreach (var s in sitesToReverse)
{
AnimateSiteTranslate(s.site, 0.0, 0.0);
}
_prevRelocatedSites = relocatedSites;
}
/// <inheritdoc/>
protected override void OnQueryDragData(QueryDragDataEventArgs e)
{
if (_dragFrozenCount > 0)
{
return;
}
base.OnQueryDragData(e);
if (e.DragData == null)
{
var data = new WidgetSiteDragDropData()
{
DraggableOffset = e.DraggableOffset,
Site = Parent,
Widget = (Data.WidgetData)Parent.Content
};
var dataObject = new DataObject(data);
e.DragData = dataObject;
}
}
private bool ProcessDataObject(DragEventArgs eventArgs, ProcessDataObjectDelegate callback)
{
WidgetSiteDragDropData data = eventArgs.Data.GetData("Droppy.WidgetSiteDragDropData") as WidgetSiteDragDropData;
if (data == null)
{
eventArgs.Effects = DragDropEffects.None;
return(false);
}
Point pt = eventArgs.GetPosition(this.Target) -
new Vector(data.DraggableOffset.X, data.DraggableOffset.Y);
Rect dragRect = new Rect(pt, new Size(data.Site.ActualWidth + data.Site.Margin.Width(),
data.Site.ActualHeight + data.Site.Margin.Height()));
Point dragCenter = new Point(dragRect.X + dragRect.Width / 2,
dragRect.Y + dragRect.Height / 2);
MatrixLoc insertIndex = new MatrixLoc(
(int)((dragCenter.Y + dragRect.Height) / dragRect.Height) - 1,
(int)((dragCenter.X + dragRect.Width) / dragRect.Width) - 1);
MatrixLoc insertLoc = _controlData.Source.Bounds.ToLocation(insertIndex);
if (_controlData.Source.Bounds.Contains(insertLoc))
{
eventArgs.Effects = DragDropEffects.Move;
callback(insertLoc, data);
}
else
{
eventArgs.Effects = DragDropEffects.None;
}
return(true);
}
private void CommitMove(MatrixLoc insertLoc, WidgetSiteDragDropData data)
{
List <SiteShiftInfo> relocatedSites;
relocatedSites = CalculateWhichSitesToShift(insertLoc, data);
if (relocatedSites.Count > 0)
{
foreach (var s in relocatedSites)
{
_controlData.Source[s.newLocation] = s.widget;
AnimateTranslate(s.site, TranslateTransform.XProperty, null);
AnimateTranslate(s.site, TranslateTransform.YProperty, null);
}
_controlData.Source[insertLoc] = data.Widget;
}
// If there are any controls left out of original position, return them now.
_prevRelocatedSites = _prevRelocatedSites.Except(relocatedSites, SiteShiftInfoComparer.Comparer).ToList();
CancelMove();
}
/// <inheritdoc/>
protected override void OnQueryDragData( QueryDragDataEventArgs e )
{
if( _dragFrozenCount > 0 ) return;
base.OnQueryDragData( e );
if( e.DragData == null )
{
var data = new WidgetSiteDragDropData() {
DraggableOffset = e.DraggableOffset,
Site = Parent,
Widget = (Data.WidgetData)Parent.Content
};
var dataObject = new DataObject( data );
e.DragData = dataObject;
}
}
private List <SiteShiftInfo> CalculateWhichSitesToShift(MatrixLoc insertLoc, WidgetSiteDragDropData data)
{
MatrixLoc sourceLoc = data.Site.Location;
List <SiteShiftInfo> relocatedSites;
int i, step;
double translateBy;
// preallocate enough so we don't need to worry about reallocations
relocatedSites = new List <SiteShiftInfo>(_controlData.Source.Bounds.RowCount +
_controlData.Source.Bounds.ColumnCount + 10);
if (insertLoc.Column != sourceLoc.Column)
{
translateBy = data.Site.ActualWidth + data.Site.Margin.Width();
if (insertLoc.Column < sourceLoc.Column)
{
step = 1;
}
else
{
step = -1;
translateBy = -translateBy;
}
for (i = insertLoc.Column; i != sourceLoc.Column; i += step)
{
MatrixLoc arrayIndex = _controlData.Source.Bounds.ToIndex(new MatrixLoc(sourceLoc.Row, i));
WidgetSiteControl ctrl = _controlData.SiteGrid[arrayIndex];
relocatedSites.Add(new SiteShiftInfo()
{
site = ctrl, widget = (Data.WidgetData)ctrl.Content,
translateX = translateBy, translateY = 0.0,
newLocation = new MatrixLoc(sourceLoc.Row, i + step)
});
}
}
if (insertLoc.Row != sourceLoc.Row)
{
translateBy = data.Site.ActualHeight + data.Site.Margin.Height();
if (insertLoc.Row < sourceLoc.Row)
{
step = 1;
}
else
{
step = -1;
translateBy = -translateBy;
}
for (i = insertLoc.Row; i != sourceLoc.Row; i += step)
{
MatrixLoc arrayIndex = _controlData.Source.Bounds.ToIndex(new MatrixLoc(i, insertLoc.Column));
WidgetSiteControl ctrl = _controlData.SiteGrid[arrayIndex];
relocatedSites.Add(new SiteShiftInfo()
{
site = ctrl, widget = (Data.WidgetData)ctrl.Content,
translateY = translateBy, translateX = 0.0,
newLocation = new MatrixLoc(i + step, insertLoc.Column)
});
}
}
return(relocatedSites);
}
