void VisualizeItemsSource()
{
//make sure we have all the values needed, before attempting to visualize
if (_TimeLineEnd != null && _TimeLineStart != null && _ItemsSource != null)
{
//Width of the event: (event-length / timeline-length) * width of root canvas
double w = (_ItemsSource.End - _ItemsSource.Start).TotalDays / (_TimeLineEnd.Value - _TimeLineStart.Value).TotalDays * RootCanvas.ActualWidth;
TimeLineBorder.Width = (w > 0) ? w : 0;
TimeLineBorder.Height = (RootCanvas.ActualHeight > 3) ? RootCanvas.ActualHeight - 3 : RootCanvas.ActualHeight;
RootCanvas.Background = _ItemsSource.BackGround;
Canvas.SetTop(TimeLineBorder, 1.5);
//place where event starts in the timeline: (event-start - timeline-start)/(timeline-end - event-start) * width of root canvas
double borderLeft = (_ItemsSource.Start - _TimeLineStart.Value).TotalDays / (_TimeLineEnd.Value - _TimeLineStart.Value).TotalDays * RootCanvas.ActualWidth;
Canvas.SetLeft(TimeLineBorder, borderLeft);
//line at bottom of timeline, to separate it from next one.
Canvas.SetTop(BottomBorderLine, RootCanvas.ActualHeight - 0.1);
BottomBorderLine.X2 = RootCanvas.ActualWidth;
//write out the label and tooltip
TimeLineTextBlock.Text = _ItemsSource.Label;
Canvas.SetTop(TimeLineTextBlock, 2);
double textBlockLeft = borderLeft + 4;
if (textBlockLeft < 0)
{
textBlockLeft = 2;
}
Canvas.SetLeft(TimeLineTextBlock, textBlockLeft);
textBlockLeft = borderLeft + 5;
if (textBlockLeft < 0)
{
textBlockLeft = 3;
}
ToolTipService.SetToolTip(TimeLineBorder, _ItemsSource.ToolTip);
ToolTipService.SetToolTip(TimeLineTextBlock, _ItemsSource.ToolTip);
RootCanvas.UpdateLayout();
}
}