/// <summary>
/// Change the current pie by replacing its PieSlices with new ones. If storePrevious is set to true,
/// the current pie will be stored away and restored during back navigation.
/// </summary>
/// <remarks>This method is used to facilitate the transition between RadialMenus.</remarks>
/// <param name="s">Sending object</param>
/// <param name="newPie">Pie object to take RadialMenuButtons from</param>
/// <param name="storePrevious">Should we store the previous pie (for back navigation)?</param>
public async void ChangePie(object s, Pie newPie, bool storePrevious)
{
BackgroundEllipse.Visibility = Visibility.Visible;
foreach (var ps in Pie.PieSlices)
{
ps.OuterArcElement.Visibility = Visibility.Collapsed;
}
// Play animations, depending on what's in the control
if (CustomRadialControlRoot.Children.Count > 0)
{
if (IsMenuChangeAnimated)
{
await CustomPieExitForChangeStoryboard.PlayAsync();
}
}
else
{
if (IsMenuChangeAnimated)
{
await PieExitForChangeStoryboard.PlayAsync();
}
}
_clearPie(storePrevious);
// Add the new ones
foreach (var rmb in newPie.Slices)
{
Pie.Slices.Add(rmb);
}
// Redraw
Pie.Draw();
Pie.UpdateLayout();
// Ensure that we remember what the last selected item was
Pie.SelectedItem = newPie.SelectedItem ?? null;
if (IsMenuChangeAnimated)
{
await PieEnterForChangeStoryboard.PlayAsync();
}
BackgroundEllipse.Visibility = Visibility.Collapsed;
}
/// <summary>
/// Clears the current pie, removing all currently displayed slices.
/// </summary>
/// <param name="storePrevious">Should we store the pie (for back navigation)?</param>
private void _clearPie(bool storePrevious)
{
// Store the current pie
if (storePrevious)
{
var backupPie = new Pie();
foreach (var rmb in Pie.Slices)
{
backupPie.Slices.Add(rmb);
}
backupPie.SelectedItem = Pie.SelectedItem;
PreviousPies.Add(backupPie);
}
// Delete the current slices
Pie.Slices.Clear();
CustomRadialControlRoot.Children.Clear();
}
/// <summary>
/// Change to custom MenuBase menu.
/// </summary>
/// <param name="s">Sending object</param>
/// <param name="newSubMenu">The new submenu which will be placed in customRadialControlRoot Canvas</param>
/// <param name="storePrevious">Should we store the previous pie (for back navigation)?</param>
public async void ChangeToCustomMenu(object s, MenuBase newSubMenu, bool storePrevious)
{
BackgroundEllipse.Visibility = Visibility.Visible;
if (IsMenuChangeAnimated)
{
await PieExitForChangeStoryboard.PlayAsync();
}
_clearPie(storePrevious);
// Redraw
Pie.Draw();
Pie.UpdateLayout();
newSubMenu.Diameter = Diameter;
CustomRadialControlRoot.Children.Add(newSubMenu);
// Check if we're in a MeterSubMenu
if (newSubMenu is MeterSubMenu)
{
var newMeterSubMenu = newSubMenu as MeterSubMenu;
var defaultBackground = (HasBackgroundEllipse)
? new SolidColorBrush(BackgroundEllipseFill)
: new SolidColorBrush(InnerNormalColor);
newMeterSubMenu.SetDefault(MeterSubMenu.BackgroundFillBrushProperty, defaultBackground);
newMeterSubMenu.SetDefault(MeterSubMenu.OuterEdgeBrushProperty, new SolidColorBrush(OuterDisabledColor));
newMeterSubMenu.SetDefault(MeterSubMenu.OuterEdgeThicknessProperty, OuterThickness);
}
newSubMenu.UpdateLayout();
if (IsMenuChangeAnimated)
{
await CustomPieEnterForChangeStoryboard.PlayAsync();
}
BackgroundEllipse.Visibility = Visibility.Collapsed;
}