private static void OnViewLevelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TimeLineItemControl ctrl = d as TimeLineItemControl;
if (ctrl != null)
{
ctrl.PlaceOnCanvas();
}
}
private static void OnTimeValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TimeLineItemControl ctrl = d as TimeLineItemControl;
if (ctrl != null)
{
ctrl.PlaceOnCanvas();
ctrl.Duration = ctrl.EndTime - ctrl.StartTime;
}
}
private TimeLineItemControl CreateTimeLineItemControl(ITimeLineDataItem data)
{
Binding startBinding = new Binding("StartTime");
startBinding.Mode = BindingMode.TwoWay;
startBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
Binding endBinding = new Binding("EndTime");
endBinding.Mode = BindingMode.TwoWay;
endBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
DateTime timelineStart = StartDate;
Binding expandedBinding = new Binding("TimelineViewExpanded");
expandedBinding.Mode = BindingMode.TwoWay;
endBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
TimeLineItemControl adder = new TimeLineItemControl();
adder.TimeLineStartTime = timelineStart;
adder.DataContext = data;
adder.Content = data;
adder.SetBinding(TimeLineItemControl.StartTimeProperty, startBinding);
adder.SetBinding(TimeLineItemControl.EndTimeProperty, endBinding);
adder.SetBinding(TimeLineItemControl.IsExpandedProperty, expandedBinding);
if (_template != null)
{
adder.ContentTemplate = _template;
}
/*adder.PreviewMouseLeftButtonDown += item_PreviewEditButtonDown;
adder.MouseMove += item_MouseMove;
adder.PreviewMouseLeftButtonUp += item_PreviewEditButtonUp;*/
adder.PreviewMouseRightButtonDown += item_PreviewEditButtonDown;
adder.MouseMove += item_MouseMove;
adder.PreviewMouseRightButtonUp += item_PreviewEditButtonUp;
adder.PreviewMouseLeftButtonUp += item_PreviewDragButtonUp;
adder.PreviewMouseLeftButtonDown += item_PreviewDragButtonDown;
adder.UnitSize = UnitSize;
return adder;
}
private void BringChainIntoView(TimeLineItemControl first, TimeLineItemControl last, int direction)
{
Double l1 = 0;
Double l2 = 0;
Double w = 0;
Double w2 = 0;
Double end = 0;
first.GetPlacementInfo(ref l1, ref w, ref end);
last.GetPlacementInfo(ref l2, ref w2, ref end);
Double chainW = end - l1;
Double leadBuffer = 4 * UnitSize;
chainW += leadBuffer;
if (direction > 0)
{
first.BringIntoView(new Rect(new Point(0, 0), new Point(chainW, Height)));
}
else
{
first.BringIntoView(new Rect(new Point(-leadBuffer, 0), new Point(chainW, Height)));
}
}
internal void HandleItemManipulation(TimeLineItemControl ctrl, TimeLineItemChangedEventArgs e)
{
Boolean doStretch = false;
TimeSpan deltaT = e.DeltaTime;
TimeSpan zeroT = new TimeSpan();
int direction = deltaT.CompareTo(zeroT);
if (direction == 0)
return;//shouldn't happen
TimeLineItemControl previous = null;
TimeLineItemControl after = null;
int afterIndex = -1;
int previousIndex = -1;
after = GetTimeLineItemControlStartingAfter(ctrl.StartTime, ref afterIndex);
previous = GetTimeLineItemControlStartingBefore(ctrl.StartTime, ref previousIndex);
if (after != null)
after.ReadyToDraw = false;
if (ctrl != null)
ctrl.ReadyToDraw = false;
Double useDeltaX = e.DeltaX;
Double cLeft = 0;
Double cWidth = 0;
Double cEnd = 0;
ctrl.GetPlacementInfo(ref cLeft, ref cWidth, ref cEnd);
switch (e.Action)
{
case TimeLineAction.Move:
#region move
Double chainGap = Double.MaxValue;
if (direction > 0)
{
//find chain connecteds that are after this one
//delta each one in that chain that we are pushing
List<TimeLineItemControl> afterChain = GetTimeLineForwardChain(ctrl, afterIndex, ref chainGap);
if (chainGap < useDeltaX)
useDeltaX = chainGap;
foreach (var ti in afterChain)
{
ti.MoveMe(useDeltaX);
}
//find the size of our chain so we bring it into view
var first = afterChain[0];
var last = afterChain[afterChain.Count - 1];
BringChainIntoView(first, last, direction);
}
if (direction < 0)
{
Boolean previousBackToStart = false;
List<TimeLineItemControl> previousChain = GetTimeLineBackwardsChain(ctrl, previousIndex, ref previousBackToStart, ref chainGap);
if (-chainGap > useDeltaX)
{
useDeltaX = chainGap;
}
if (!previousBackToStart)
{
foreach (var ti in previousChain)
{
ti.MoveMe(useDeltaX);
}
}
var first = previousChain[0];//previousChain[previousChain.Count - 1];
var last = previousChain[previousChain.Count - 1];
BringChainIntoView(last, first, direction);
}
#endregion
break;
case TimeLineAction.StretchStart:
switch (e.Mode)
{
#region stretchstart
case TimeLineManipulationMode.Linked:
#region linked
Double gap = Double.MaxValue;
if (previous != null)
{
Double pLeft = 0;
Double pWidth = 0;
Double pEnd = 0;
previous.GetPlacementInfo(ref pLeft, ref pWidth, ref pEnd);
gap = cLeft - pEnd;
}
if (direction < 0 && Math.Abs(gap) < Math.Abs(useDeltaX) && Math.Abs(gap) > _bumpThreshold)//if we are negative and not linked, but about to bump
useDeltaX = -gap;
if (Math.Abs(gap) < _bumpThreshold)
{//we are linked
if (ctrl.CanDelta(0, useDeltaX) && previous.CanDelta(1, useDeltaX))
{
ctrl.MoveStartTime(useDeltaX);
previous.MoveEndTime(useDeltaX);
}
}
else if (ctrl.CanDelta(0, useDeltaX))
{
ctrl.MoveStartTime(useDeltaX);
}
break;
#endregion
case TimeLineManipulationMode.Free:
#region free
gap = Double.MaxValue;
doStretch = direction > 0;
if (direction < 0)
{
//disallow us from free stretching into another item
if (previous != null)
{
Double pLeft = 0;
Double pWidth = 0;
Double pEnd = 0;
previous.GetPlacementInfo(ref pLeft, ref pWidth, ref pEnd);
gap = cLeft - pEnd;
}
else
{
//don't allow us to stretch further than the gap between current and start time
DateTime s = (DateTime)GetValue(StartDateProperty);
gap = cLeft;
}
doStretch = gap > _bumpThreshold;
if (gap < useDeltaX)
{
useDeltaX = gap;
}
}
doStretch &= ctrl.CanDelta(0, useDeltaX);
if (doStretch)
{
ctrl.MoveStartTime(useDeltaX);
}
#endregion
break;
default:
break;
#endregion
}
break;
case TimeLineAction.StretchEnd:
switch (e.Mode)
{
#region stretchend
case TimeLineManipulationMode.Linked:
#region linked
Double gap = Double.MaxValue;
if (after != null)
{
Double aLeft = 0;
Double aWidth = 0;
Double aEnd = 0;
after.GetPlacementInfo(ref aLeft, ref aWidth, ref aEnd);
gap = aLeft - cEnd;
}
if (direction > 0 && gap > _bumpThreshold && gap < useDeltaX)//if we are positive, not linked but about to bump
useDeltaX = -gap;
if (gap < _bumpThreshold)
{//we are linked
if (ctrl.CanDelta(1, useDeltaX) && after.CanDelta(0, useDeltaX))
{
ctrl.MoveEndTime(useDeltaX);
after.MoveStartTime(useDeltaX);
}
}
else if (ctrl.CanDelta(0, useDeltaX))
{
ctrl.MoveEndTime(useDeltaX);
}
break;
#endregion
case TimeLineManipulationMode.Free:
#region free
Double nextGap = Double.MaxValue;
doStretch = true;
if (direction > 0 && after != null)
{
//disallow us from free stretching into another item
Double nLeft = 0;
Double nWidth = 0;
Double nEnd = 0;
after.GetPlacementInfo(ref nLeft, ref nWidth, ref nEnd);
nextGap = nLeft - cEnd;
doStretch = nextGap > _bumpThreshold;
if (nextGap < useDeltaX)
useDeltaX = nextGap;
}
doStretch &= ctrl.CanDelta(1, useDeltaX);
if (doStretch)
{
ctrl.MoveEndTime(useDeltaX);
}
break;
#endregion
default:
break;
#endregion
}
break;
default:
break;
}
}
public TimeLineDragAdorner(TimeLineItemControl uiElement, DataTemplate template)
: base(uiElement)
{
_adorningContentPresenter = new ContentPresenter();
_adorningContentPresenter.Content = uiElement.DataContext;
_adorningContentPresenter.ContentTemplate = template;
_adorningContentPresenter.Opacity = 0.5;
_layer = AdornerLayer.GetAdornerLayer(uiElement);
_layer.Add(this);
IsHitTestVisible = false;
}
void TimeLineControl_Drop(object sender, DragEventArgs e)
{
DragAdorner = null;
TimeLineItemControl dropper = e.Data.GetData(typeof(TimeLineItemControl)) as TimeLineItemControl;
ITimeLineDataItem dropData = null;
if (dropper == null)
{
//dropData = e.Data.GetData(typeof(ITimeLineDataItem)) as ITimeLineDataItem;
dropData = e.Data.GetData("GongSolutions.Wpf.DragDrop") as ITimeLineDataItem;
if (dropData != null)
{
//I haven't figured out why but
//sometimes when dropping from an external source
//the drop event hits twice.
//that results in ugly duplicates ending up in the timeline
//and it is a mess.
if (Items.Contains(dropData))
return;
//create a new timeline item control from this data
dropper = CreateTimeLineItemControl(dropData);
dropper.StartTime = StartDate;
dropper.InitializeDefaultLength();
Children.Remove(_tmpDraggAdornerControl);
_tmpDraggAdornerControl = null;
}
}
var dropX = e.GetPosition(this).X;
int newIndex = GetDroppedNewIndex(dropX);
var curData = dropper.DataContext as ITimeLineDataItem;
var curIndex = Items.IndexOf(curData);
if ((curIndex == newIndex || curIndex + 1 == newIndex) && dropData == null && dropper.Parent == this)//dropdata null is to make sure we aren't failing on adding a new data item into the timeline
//dropper.parent==this makes it so that we allow a dropper control from another timeline to be inserted in at the start.
{
return;//our drag did nothing meaningful so we do nothing.
}
if (dropper != null)
{
DateTime start = (DateTime)GetValue(StartDateProperty);
if (newIndex == 0)
{
if (dropData == null)
{
RemoveTimeLineItemControl(dropper);
}
if (dropper.Parent != this && dropper.Parent is TimeLineControl)
{
var tlCtrl = dropper.Parent as TimeLineControl;
tlCtrl.RemoveTimeLineItemControl(dropper);
}
InsertTimeLineItemControlAt(newIndex, dropper);
dropper.MoveToNewStartTime(start);
MakeRoom(newIndex, dropper.Width);
}
else//we are moving this after something.
{
//find out if we are moving the existing one back or forward.
var placeAfter = GetTimeLineItemControlAt(newIndex - 1);
if (placeAfter != null)
{
start = placeAfter.EndTime;
RemoveTimeLineItemControl(dropper);
if (curIndex < newIndex && curIndex >= 0)//-1 is on an insert in which case we definitely don't want to take off on our new index value
{
//we are moving forward.
newIndex--;//when we removed our item, we shifted our insert index back 1
}
if (dropper.Parent != null && dropper.Parent != this)
{
var ptl = dropper.Parent as TimeLineControl;
ptl.RemoveTimeLineItemControl(dropper);
}
InsertTimeLineItemControlAt(newIndex, dropper);
dropper.MoveToNewStartTime(start);
MakeRoom(newIndex, dropper.Width);
}
}
}
//ReDrawChildren();
DrawBackGround();
e.Handled = true;
}
void TimeLineControl_DragOver(object sender, DragEventArgs e)
{
//throw new NotImplementedException();
TimeLineItemControl d = e.Data.GetData(typeof(TimeLineItemControl)) as TimeLineItemControl;
if (d != null)
{
if (Manager != null)
{
if (!Manager.CanAddToTimeLine(d.DataContext as ITimeLineDataItem))
{
e.Effects = DragDropEffects.None;
return;
}
}
e.Effects = DragDropEffects.Move;
//this is an internal drag or a drag from another time line control
if (DragAdorner == null)
{
_dragAdorner = new TimeLineDragAdorner(d, ItemTemplate);
}
DragAdorner.MousePosition = e.GetPosition(d);
DragAdorner.InvalidateVisual();
}
else
{//GongSolutions.Wpf.DragDrop
var d2 = e.Data.GetData("GongSolutions.Wpf.DragDrop");
if (d2 != null)
{
if (Manager != null)
{
if (!Manager.CanAddToTimeLine(d2 as ITimeLineDataItem))
{
e.Effects = DragDropEffects.None;
return;
}
}
e.Effects = DragDropEffects.Move;
if (DragAdorner == null)
{
//we are dragging from an external source and we don't have a timeline item control of any sort
Children.Remove(_tmpDraggAdornerControl);
//in order to get an adornment layer the control has to be somewhere
_tmpDraggAdornerControl = new TimeLineItemControl();
_tmpDraggAdornerControl.UnitSize = UnitSize;
Children.Add(_tmpDraggAdornerControl);
Canvas.SetLeft(_tmpDraggAdornerControl, -1000000);
_tmpDraggAdornerControl.DataContext = d2;
_tmpDraggAdornerControl.StartTime = StartDate;
_tmpDraggAdornerControl.InitializeDefaultLength();
_tmpDraggAdornerControl.ContentTemplate = ItemTemplate;
_dragAdorner = new TimeLineDragAdorner(_tmpDraggAdornerControl, ItemTemplate);
}
DragAdorner.MousePosition = e.GetPosition(_tmpDraggAdornerControl);
DragAdorner.InvalidateVisual();
}
}
DragScroll(e);
}
void TimeLineControL_DragLeave(object sender, DragEventArgs e)
{
DragAdorner = null;
Children.Remove(_tmpDraggAdornerControl);
_tmpDraggAdornerControl = null;
}
private void RemoveTimeLineItemControl(TimeLineItemControl remover)
{
var curData = remover.DataContext as ITimeLineDataItem;
remover.PreviewMouseRightButtonDown -= item_PreviewEditButtonDown;
remover.MouseMove -= item_MouseMove;
remover.PreviewMouseRightButtonUp -= item_PreviewEditButtonUp;
remover.PreviewMouseLeftButtonUp -= item_PreviewDragButtonUp;
remover.PreviewMouseLeftButtonDown -= item_PreviewDragButtonDown;
Items.Remove(curData);
Children.Remove(remover);
}
void item_PreviewDragButtonUp(object sender, MouseButtonEventArgs e)
{
_dragStartPosition.X = double.MinValue;
_dragStartPosition.Y = double.MinValue;
_dragObject = null;
}
void item_PreviewDragButtonDown(object sender, MouseButtonEventArgs e)
{
_dragStartPosition = Mouse.GetPosition(null);
_dragObject = sender as TimeLineItemControl;
}
private void InsertTimeLineItemControlAt(int index, TimeLineItemControl adder)
{
var Data = adder.DataContext as ITimeLineDataItem;
if (Items.Contains(Data))
return;
adder.PreviewMouseRightButtonDown -= item_PreviewEditButtonDown;
adder.MouseMove -= item_MouseMove;
adder.PreviewMouseRightButtonUp -= item_PreviewEditButtonUp;
adder.PreviewMouseLeftButtonUp -= item_PreviewDragButtonUp;
adder.PreviewMouseLeftButtonDown -= item_PreviewDragButtonDown;
adder.PreviewMouseRightButtonDown += item_PreviewEditButtonDown;
adder.MouseMove += item_MouseMove;
adder.PreviewMouseRightButtonUp += item_PreviewEditButtonUp;
adder.PreviewMouseLeftButtonUp += item_PreviewDragButtonUp;
adder.PreviewMouseLeftButtonDown += item_PreviewDragButtonDown;
//child 0 is our grid and we want to keep that there.
Children.Insert(index + 1, adder);
Items.Insert(index, Data);
}
/// <summary>
/// Returns a list of all timeline controls starting with the current one and moving forward
/// so long as they are contiguous.
/// </summary>
/// <param name="current"></param>
/// <returns></returns>
private List<TimeLineItemControl> GetTimeLineForwardChain(TimeLineItemControl current, int afterIndex, ref Double chainGap)
{
List<TimeLineItemControl> returner = new List<TimeLineItemControl>() { current };
Double left = 0, width = 0, end = 0;
current.GetPlacementInfo(ref left, ref width, ref end);
if (afterIndex < 0)
{
//we are on the end of the list so there is no limit.
chainGap = Double.MaxValue;
return returner;
}
Double bumpThreshold = _bumpThreshold;
Double lastAddedEnd = end;
while (afterIndex < Items.Count)
{
left = width = end = 0;
var checker = GetTimeLineItemControlAt(afterIndex++);
if (checker != null)
{
checker.GetPlacementInfo(ref left, ref width, ref end);
Double gap = left - lastAddedEnd;
if (gap > bumpThreshold)
{
chainGap = gap;
return returner;
}
returner.Add(checker);
lastAddedEnd = end;
}
}
//we have chained off to the end and thus have no need to worry about our gap
chainGap = Double.MaxValue;
return returner;
}
/// <summary>
/// Returns a list of all timeline controls starting with the current one and moving backwoards
/// so long as they are contiguous. If the chain reaches back to the start time of the timeline then the
/// ChainsBackToStart boolean is modified to reflect that.
/// </summary>
/// <param name="current"></param>
/// <returns></returns>
private List<TimeLineItemControl> GetTimeLineBackwardsChain(TimeLineItemControl current, int prevIndex, ref Boolean ChainsBackToStart, ref Double chainGap)
{
List<TimeLineItemControl> returner = new List<TimeLineItemControl>() { current };
Double left = 0, width = 0, end = 0;
current.GetPlacementInfo(ref left, ref width, ref end);
if (prevIndex < 0)
{
chainGap = Double.MaxValue;
ChainsBackToStart = left == 0;
return returner;
}
Double lastAddedLeft = left;
while (prevIndex >= 0)
{
left = width = end = 0;
var checker = GetTimeLineItemControlAt(prevIndex--);
if (checker != null)
{
checker.GetPlacementInfo(ref left, ref width, ref end);
if (lastAddedLeft - end > _bumpThreshold)
{
//our chain just broke;
chainGap = lastAddedLeft - end;
ChainsBackToStart = lastAddedLeft == 0;
return returner;
}
returner.Add(checker);
lastAddedLeft = left;
}
}
ChainsBackToStart = lastAddedLeft == 0;
chainGap = lastAddedLeft;//gap between us and zero;
return returner;
}
private static void OnEditThresholdChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TimeLineItemControl ctrl = d as TimeLineItemControl;
}