/// <summary>
/// Adds a pane to the visited list, and sets it to the current expanded pane
/// </summary>
public void VisitPane(AccordionPane pane)
{
if (pane != null)
{
ExpandedPane = pane;
}
}
/// <summary>
/// Replace a visited pane with another, deleting the previous history.
/// </summary>
public void VisitPane(AccordionPane oldPane, AccordionPane newPane)
{
if (oldPane != newPane)
{
int index;
if ((index = visitedPanes.IndexOf(oldPane)) >= 0)
{
visitedPanes[index] = newPane;
visitedPanes.RemoveAll((pane) => index < visitedPanes.IndexOf(pane));
}
ExpandedPane = newPane;
}
}
public AccordionHeader(AccordionPane pane)
{
HeightRequest = 50;
HorizontalOptions = LayoutOptions.FillAndExpand;
// Setup the AccordionHeader layout
Content = (titleLayout = new RelativeLayout()
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand
});
titleLayout.Children.Add((imageHolder = new StackLayout()
{
VerticalOptions = LayoutOptions.FillAndExpand,
WidthRequest = 60
}), heightConstraint: Constraint.RelativeToParent((parent) => { return(parent.Height); }));
StackLayout imageContainer;
imageHolder.Children.Add(imageContainer = new StackLayout()
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
Padding = new Thickness(20, 0, 0, 0)
});
imageContainer.Children.Add((iconImage = new Image()
{
HeightRequest = 32,
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.CenterAndExpand
}));
titleLayout.Children.Add((titleLabel = new Label()
{
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.Center,
HorizontalTextAlignment = TextAlignment.Center,
VerticalTextAlignment = TextAlignment.Center,
FontSize = 20f,
TextColor = Color.White,
FontAttributes = FontAttributes.Bold
}), widthConstraint: Constraint.RelativeToParent((parent) => { return(parent.Width); }),
heightConstraint: Constraint.RelativeToParent((parent) => { return(parent.Height); }));
}
/// <summary>
/// Called when ExpandedPane property is changed
/// </summary>
private void OnExpandedPaneChanged(AccordionPane oldExpanded)
{
bool expandedFound = false;
if (ExpandedPane != null)
{
AccordionPane newExpanded = ExpandedPane;
if (!visitedPanes.Contains(newExpanded))
{
visitedPanes.Add(newExpanded);
}
nextPanes.Children.Clear();
prevPanes.Children.Clear();
if (oldExpanded != null)
{
oldExpanded.IsVisible = false;
oldExpanded.OnPaneCollapsed(); // invoke method when the pane collapses
}
newExpanded.IsVisible = true;
newExpanded.OnPaneExpanded();
foreach (AccordionPane pane in visitedPanes)
{
if (pane == newExpanded)
{
expandedFound = true;
}
else
{
if (expandedFound)
{
nextPanes.Children.Add(pane.Header);
}
else
{
prevPanes.Children.Add(pane.Header);
}
}
}
}
}
/// <summary>
/// Checks if a pane is visited
/// </summary>
public bool IsPaneVisited(AccordionPane pane)
{
return(visitedPanes.Contains(pane));
}
