public FixedStackLayout(IOCPanel panel, IItemGeneratorHelper generator)
{
_panel = panel;
_generator = generator;
_desiredSizeDic = new ConcurrentDictionary <int, Size>();
Extent = Size.Empty;
}
public HalfVariableWrapLayout(IOCPanel panel, IItemGeneratorHelper generator)
{
_panel = panel;
_generator = generator;
_lineSizeDictionary = new ConcurrentDictionary <int, double>();
Extent = Size.Empty;
}
public PanelScrollHelper(IOCPanel panel, ScrollViewer scrollOwner)
{
_panel = panel;
_panel.RenderTransform = _trans = new TranslateTransform(); // For use in the IScrollInfo implementation
_extent = Size.Empty;
_viewport = Size.Empty;
_owner = scrollOwner;
_offset = new Point(0, 0);
}
private static void OnResetLayout(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
IOCPanel panel = d as IOCPanel;
if (panel.Layout != null)
{
panel.Layout.ResetLayout();
}
panel.resetScrollOffset();
}
private static void OnModeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
IOCPanel panel = d as IOCPanel;
if (panel.IsInitialized)
{
//panel.RemoveInternalChildRange(0, panel.getInternalChildren().Count);
foreach (var child in panel.Children)
{
(child as FrameworkElement).InvalidateMeasure();
}
panel.Layout = panel.getLayout();
panel.resetScrollOffset();
}
}
/// <summary>
/// Add and subtract CacheItemCount to StartIdx and EndIdx.
/// </summary>
/// <param name="panel"></param>
/// <param name="startIdx"></param>
/// <param name="endIdx"></param>
public static void UpdateCacheItemCount(this IOCPanel panel,
ref int startIdx, ref int endIdx)
{
//Add and subtract CacheItemCount to StartIdx and EndIdx.
int itemCount = panel.getItemCount();
startIdx -= panel.CacheItemCount;
endIdx += panel.CacheItemCount;
if (startIdx < 0)
{
startIdx = 0;
}
if (endIdx > itemCount - 1)
{
endIdx = itemCount - 1;
}
}
public NullScrollHelper(IOCPanel panel)
{
Extent = ViewPort = Size.Empty;
}
public FixedWrapLayout(IOCPanel panel, IItemGeneratorHelper generator)
{
_panel = panel;
_generator = generator;
Extent = Size.Empty;
}
public VirtualItemGenerator(IOCPanel panel)
{
_panel = panel;
}