/// <summary>
/// Event handler on thumb is dragged
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnDragDelta(object sender, DragDeltaEventArgs e)
{
if (sender == _thumbMove)
{
PlannerTimelinePanel timelinePanel = VisualParent as PlannerTimelinePanel;
if (timelinePanel != null)
{
if (VisualTreeHelper.HitTest(timelinePanel, Mouse.GetPosition(timelinePanel)) == null)
{
if (_virtualAppointmentItem == null)
{
_virtualAppointmentItem = new PlannerVirtualAppointmentItem();
_virtualAppointmentItem.DataContext = DataContext;
}
Planner planner = PlannerHelper.FindVisualParent <Planner>(timelinePanel);
planner.PreviewVirtualAppointmentItem(_virtualAppointmentItem);
}
else
{
if (_virtualAppointmentItem != null)
{
Planner planner = PlannerHelper.FindVisualParent <Planner>(timelinePanel);
planner.RemoveVirtualAppointmentItem(_virtualAppointmentItem);
_virtualAppointmentItem = null;
}
}
}
if (_virtualAppointmentItem != null)
{
_virtualAppointmentItem.Arrange(new Rect(VisualOffset.X + e.HorizontalChange, VisualOffset.Y, ActualWidth, ActualHeight));
}
Arrange(new Rect(VisualOffset.X + e.HorizontalChange, VisualOffset.Y, ActualWidth, ActualHeight));
}
else if (sender == _thumbLeft)
{
double width = ActualWidth - e.HorizontalChange;
if (width < 10)
{
width = 10;
}
Width = width;
Arrange(new Rect(VisualOffset.X + e.HorizontalChange, VisualOffset.Y, width, ActualHeight));
}
else if (sender == _thumbRight)
{
double width = ActualWidth + e.HorizontalChange;
if (width < 10)
{
width = 10;
}
Width = width;
Arrange(new Rect(VisualOffset.X, VisualOffset.Y, width, ActualHeight));
}
e.Handled = true;
}
/// <summary>
/// Calculate datetime from given offset from start
/// </summary>
/// <param name="offset"></param>
/// <returns></returns>
public DateTime CalculateDateTime(double offset)
{
DateTime?Start = PlannerHelper.FindVisualParent <Planner>(this).GetValue(Planner.StartProperty) as DateTime?;
DateTime?End = PlannerHelper.FindVisualParent <Planner>(this).GetValue(Planner.EndProperty) as DateTime?;
TimeSpan timeSpan = End.Value.AddHours(1) - Start.Value;
double minutes = offset / (ActualWidth / timeSpan.TotalMinutes);
DateTime result = Start.Value.AddMinutes(minutes);
return(new DateTime(result.Year, result.Month, result.Day, result.Hour, result.Minute, 0));
}
/// <summary>
/// Preview virtual appointment item on a virtual panel
/// </summary>
/// <param name="appointmentItem"></param>
public void PreviewVirtualAppointmentItem(PlannerAppointmentItem appointmentItem)
{
PlannerEntity targetEntity = PlannerHelper.FindVisualChild <PlannerEntity>(this).Find(_ => VisualTreeHelper.HitTest(_, Mouse.GetPosition(_)) != null);
if (targetEntity != null)
{
if (appointmentItem.Parent != null)
{
if (appointmentItem.Parent == targetEntity.GetVirtualPanel())
{
return;
}
PlannerTimelinePanel currentPanel = appointmentItem.Parent as PlannerTimelinePanel;
currentPanel.Children.Remove(appointmentItem);
}
PlannerTimelinePanel virtualPanel = targetEntity.GetVirtualPanel();
virtualPanel.Children.Add(appointmentItem);
}
}
/// <summary>
/// Event handler on thumb drag is completed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnDragCompleted(object sender, DragCompletedEventArgs e)
{
PlannerTimelinePanel timelinePanel = PlannerHelper.FindVisualParent <PlannerTimelinePanel>(this);
if (timelinePanel == null)
{
return;
}
if (sender == _thumbMove)
{
TimeSpan timeSpan = End - Start;
Start = timelinePanel.CalculateDateTime(VisualOffset.X);
End = Start + timeSpan;
if (_virtualAppointmentItem != null)
{
IPlannerEntity currentEntity = PlannerHelper.FindVisualParent <PlannerEntity>(this).DataContext as IPlannerEntity;
IPlannerEntity targetEntity = PlannerHelper.FindVisualParent <PlannerEntity>(_virtualAppointmentItem).DataContext as IPlannerEntity;
IAppointment appointment = DataContext as IAppointment;
currentEntity.Appointments.Remove(appointment);
targetEntity.Appointments.Add(appointment);
Planner planner = PlannerHelper.FindVisualParent <Planner>(timelinePanel);
planner.RemoveVirtualAppointmentItem(_virtualAppointmentItem);
_virtualAppointmentItem = null;
}
}
else if (sender == _thumbLeft)
{
Start = timelinePanel.CalculateDateTime(VisualOffset.X);
}
else if (sender == _thumbRight)
{
End = timelinePanel.CalculateDateTime(VisualOffset.X + ActualWidth);
}
e.Handled = true;
}
/// <summary>
/// Arrange override
/// </summary>
/// <param name="finalSize"></param>
/// <returns></returns>
protected override Size ArrangeOverride(Size finalSize)
{
double top = 0;
double left = 0;
double width = 0;
double height = 0;
DateTime?Start = PlannerHelper.FindVisualParent <Planner>(this).GetValue(Planner.StartProperty) as DateTime?;
DateTime?End = PlannerHelper.FindVisualParent <Planner>(this).GetValue(Planner.EndProperty) as DateTime?;
TimeSpan timeSpan = End.Value.AddHours(1) - Start.Value;
foreach (UIElement element in Children)
{
DateTime?startTime = element.GetValue(PlannerAppointmentItem.StartProperty) as DateTime?;
DateTime?endTime = element.GetValue(PlannerAppointmentItem.EndProperty) as DateTime?;
TimeSpan timeSpanStart = startTime.Value - Start.Value;
TimeSpan timeSpanEnd = endTime.Value - Start.Value;
double start_minutes = timeSpanStart.TotalMinutes;
double end_minutes = timeSpanEnd.TotalMinutes;
double start_offset = (finalSize.Width / timeSpan.TotalMinutes) * start_minutes;
double end_offset = (finalSize.Width / timeSpan.TotalMinutes) * end_minutes;
left = start_offset;
top = 1;
height = finalSize.Height - 2;
width = (end_offset - start_offset);
element.Arrange(new Rect(left, top, width, height));
(element as FrameworkElement).Width = width;
}
return(finalSize);
}