/// <summary>
/// Create item container based on ItemTemplate or ItemTemplateSelector
/// </summary>
private View CreateItemView(object model)
{
View item = null;
if (ItemTemplateSelector != null)
{
DataTemplate containerTemplate = ItemTemplateSelector.SelectTemplate(model, null) as DataTemplate;
item = containerTemplate.CreateContent() as View;
}
else if (ItemTemplate != null)
{
item = ItemTemplate.CreateContent() as View;
}
else
{
item = new ContentView();
}
if (item == null)
{
throw new Exception("ItemTemplate is not subclass of ContentView");
}
item.BindingContext = model;
return(item);
}
private ItemInfo AddItem(object item)
{
var trans = transform;
var itemTemplate = ItemTemplateSelector != null?ItemTemplateSelector.SelectTemplate(item) : _itemTemplate;
var control = Instantiate(itemTemplate);
var rect = control.GetComponent <RectTransform>();
if (rect == null)
{
control.transform.parent = trans;
}
else
{
rect.SetParent(trans, false);
}
var info = new ItemInfo(item, control, rect);
_items.Add(info);
control.SetActive(true);
var context = control.GetComponent <DataContext>();
if (context != null)
{
context.UpdateValue(item);
}
OnItemAdded(info);
return(info);
}
protected virtual HubSection GenerateHubSection(object item)
{
var section = new HubSection()
{
DataContext = item,
Header = item,
ContentTemplate = ItemTemplateSelector == null ? ItemTemplate : ItemTemplateSelector.SelectTemplate(item),
};
if (!String.IsNullOrEmpty(IsHeaderInteractivePath))
{
section.SetBinding(HubSection.IsHeaderInteractiveProperty, new Binding()
{
Path = new PropertyPath(this.IsHeaderInteractivePath)
});
}
if (!String.IsNullOrEmpty(HeaderPath))
{
section.SetBinding(HubSection.HeaderProperty, new Binding()
{
Path = new PropertyPath(this.HeaderPath)
});
}
return(section);
}
private void UpdatePrimaryCommands()
{
if (AssociatedObject == null)
{
return;
}
if (PrimaryCommands == null)
{
return;
}
AssociatedObject.PrimaryCommands.Clear();
if (!(PrimaryCommands is IEnumerable enumerable))
{
AssociatedObject.PrimaryCommands.Clear();
return;
}
foreach (var command in enumerable)
{
var template = ItemTemplateSelector.SelectTemplate(command, AssociatedObject);
if (!(template?.LoadContent() is FrameworkElement dependencyObject))
{
continue;
}
dependencyObject.DataContext = command;
if (dependencyObject is ICommandBarElement icommandBarElement)
{
AssociatedObject.PrimaryCommands.Add(icommandBarElement);
}
}
}
private ViewCell CreateViewCell(object item)
{
var command = SelectedCommand ?? new Command((obj) =>
{
var args = new ItemTappedEventArgs(ItemsSource, item);
ItemSelected?.Invoke(this, args);
});
var commandParameter = SelectedCommandParameter ?? item;
var itemTemplateInstance = ItemTemplateSelector != null?ItemTemplateSelector.SelectTemplate(item, null) : ItemTemplate;
var viewCell = itemTemplateInstance.CreateContent() as ViewCell;
var tap = new TapGestureRecognizer();
tap.Command = command;
tap.CommandParameter = commandParameter;
tap.NumberOfTapsRequired = 1;
viewCell.View.BindingContext = item;
viewCell.View.GestureRecognizers.Add(tap);
tap.Tapped += Tap_Tapped;
return(viewCell);
}
/// <summary>
/// Show notification using predefined DataTemplate from ItemTemplateSelector
/// </summary>
/// <param name="notificationType">Type of the notification</param>
/// <param name="duration">Displayed duration of the notification in ms (less or equal 0 means infinite duration)</param>
public void Show(InAppNotificationType notificationType, int duration = 0)
{
var template = ItemTemplateSelector.SelectTemplate(notificationType) ?? null;
ContentTemplate = template;
Content = null;
//TODO set datacontext if notification type would be recognized by appropriate ViewModel
Show(duration);
}
/// <summary>
/// Adds an item container to this control for the specified item.
/// </summary>
/// <param name="index">The index of the item being added.</param>
/// <param name="item">The item for which to add an item container.</param>
/// <returns>The item container that was added.</returns>
private DependencyObject AddItemContainer(Int32 index, Object item)
{
if (ItemsPanelElement == null)
{
return(null);
}
var container = default(DependencyObject);
if (IsItemContainer(item))
{
container = (DependencyObject)item;
}
else
{
container = GetContainerForItemOverride();
var template = ItemTemplateSelector?.SelectTemplate(item, container) ?? ItemTemplate;
if (template != null)
{
var templateInstance = template.LoadContent(item, item?.GetType());
PrepareContainerForItemOverride(container, templateInstance);
}
else
{
PrepareContainerForItemOverride(container, item);
}
}
itemContainerGenerator.AssociateContainerWithItem(container, item);
itemContainers.Insert(index, container);
var containerElement = container as UIElement;
if (containerElement != null)
{
ItemsPanelElement.Children.Insert(index, containerElement);
containerElement.ChangeLogicalParent(this);
}
SetValue(HasItemsPropertyKey, true);
return(container);
}
void CreatePin(object newItem)
{
DataTemplate itemTemplate = ItemTemplate;
if (itemTemplate == null)
{
itemTemplate = ItemTemplateSelector?.SelectTemplate(newItem, this);
}
if (itemTemplate == null)
{
return;
}
var pin = (Pin)itemTemplate.CreateContent();
pin.BindingContext = newItem;
_pins.Add(pin);
}
private MapMarker CreateMarker(object sourceItem)
{
var template = ItemTemplateSelector != null
? ItemTemplateSelector.SelectTemplate(sourceItem, null) ?? ItemTemplate
: ItemTemplate;
if (template == null)
{
return(null);
}
var dataElement = template.LoadContent() as FrameworkElement;
if (dataElement == null)
{
return(null);
}
var labelTemplate = _mapControl.ShowLabel ? (LabelTemplateSelector != null
? LabelTemplateSelector.SelectTemplate(sourceItem, null) ?? LabelTemplate
: LabelTemplate) : null;
var container = new MapMarkerContainer();
container.SetValue(StyleProperty, MarkerContainerStyle);
container.Content = dataElement;
container.DataContext = sourceItem;
if (labelTemplate != null)
{
container.LabelContent = labelTemplate.LoadContent() as FrameworkElement;
}
var marker = new MapMarker(container);
marker.MouseDown += (sender, args) => SelectMarker((MapMarker)sender,
Keyboard.IsKeyDown(Key.LeftShift) || (Keyboard.IsKeyDown(Key.RightShift) ||
Keyboard.IsKeyDown(Key.LeftCtrl) || (Keyboard.IsKeyDown(Key.RightCtrl))));
return(marker);
}
private Visual3D CreateVisualFromModel(object item)
{
if (this.ItemTemplate != null)
{
return(this.ItemTemplate.CreateItem(item));
}
else if (ItemTemplateSelector != null)
{
var viewPort = Visual3DHelper.GetViewport3D(this);
var dataTemplate = ItemTemplateSelector.SelectTemplate(item, viewPort);
if (dataTemplate != null)
{
return(dataTemplate.CreateItem(item));
}
else
{
return(item as Visual3D);
}
}
else
{
return(item as Visual3D);
}
}
protected virtual void ItemsModel3D_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Replace:
case NotifyCollectionChangedAction.Remove:
if (e.OldItems != null)
{
foreach (var item in e.OldItems)
{
if (elementDict.TryGetValue(item, out Element3D element))
{
Children.Remove(element);
elementDict.Remove(item);
element.Dispose();
}
}
InvalidateRender();
}
break;
case NotifyCollectionChangedAction.Reset:
Clear();
break;
}
switch (e.Action)
{
case NotifyCollectionChangedAction.Reset:
if (this.ItemsSource != null)
{
if (this.ItemTemplate == null)
{
if (ItemTemplateSelector != null)
{
foreach (var item in this.ItemsSource)
{
var dataTemplate = ItemTemplateSelector.SelectTemplate(item, null);
var model = dataTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
else
{
foreach (var item in this.ItemsSource)
{
var model = item as Element3D;
if (model != null)
{
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
else
{
foreach (var item in this.ItemsSource)
{
var model = this.ItemTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
InvalidateRender();
break;
case NotifyCollectionChangedAction.Add:
case NotifyCollectionChangedAction.Replace:
if (e.NewItems != null)
{
if (this.ItemTemplate != null)
{
foreach (var item in e.NewItems)
{
var model = this.ItemTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
else
{
if (ItemTemplateSelector != null)
{
foreach (var item in e.NewItems)
{
var dataTemplate = ItemTemplateSelector.SelectTemplate(item, null);
var model = dataTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
else
{
foreach (var item in e.NewItems)
{
var model = item as Element3D;
if (model != null)
{
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
}
break;
}
}
/// <summary>
/// Handles changes in the ItemsSource property.
/// </summary>
/// <param name="e">
/// The <see cref="DependencyPropertyChangedEventArgs"/> instance containing the event data.
/// </param>
/// <exception cref="System.InvalidOperationException">
/// Cannot create a Model3D from ItemTemplate.
/// </exception>
protected virtual void ItemsSourceChanged(DependencyPropertyChangedEventArgs e)
{
if (e.OldValue is INotifyCollectionChanged o)
{
o.CollectionChanged -= ItemsModel3D_CollectionChanged;
}
foreach (Element3D item in Children)
{
item.DataContext = null;
}
Clear();
if (e.NewValue is INotifyCollectionChanged n)
{
n.CollectionChanged -= ItemsModel3D_CollectionChanged;
n.CollectionChanged += ItemsModel3D_CollectionChanged;
}
if (ItemsSource == null)
{
return;
}
if (this.ItemTemplate == null)
{
if (ItemTemplateSelector != null)
{
foreach (var item in this.ItemsSource)
{
var dataTemplate = ItemTemplateSelector.SelectTemplate(item, null);
var model = dataTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
else
{
foreach (var item in this.ItemsSource)
{
var model = item as Element3D;
if (model != null)
{
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
else
{
foreach (var item in this.ItemsSource)
{
var model = this.ItemTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
if (Children.Count > 0)
{
var groupNode = SceneNode as GroupNode;
groupNode.OctreeManager?.RequestRebuild();
}
}
protected virtual void PrepareContainerForItemOverride(object item, FrameworkElement container)
{
if (container is IItemContainer)
{
DataTemplate itemTemplate = ItemTemplate ?? (ItemTemplateSelector != null ? ItemTemplateSelector.SelectTemplate(item, container) : null);
Style itemContainerStyle = ItemContainerStyle ?? (ItemContainerStyleSelector != null ? ItemContainerStyleSelector.SelectStyle(item, container) : null);
((IItemContainer)container).PrepareContainerForItem(item, itemTemplate, itemContainerStyle);
}
}
/// <summary>
/// Generates content based on the template information
/// </summary>
/// <exception cref="System.Exception">ItemsPanel must be a block element</exception>
private void GenerateContent()
{
if (!IsLoaded)
{
return;
}
Blocks.Clear();
if ((ItemTemplate == null && ItemTemplateSelector == null) || ItemsSource == null)
{
return;
}
FrameworkContentElement panel = null;
foreach (var data in ItemsSource)
{
if (panel == null)
{
if (ItemsPanel == null)
{
panel = this;
}
else
{
var itemsPanelTemplate = LoadDataTemplate(ItemsPanel);
foreach (var templatePart in itemsPanelTemplate)
{
var block = templatePart as Block;
if (block == null)
{
throw new Exception("ItemsPanel must be a block element");
}
Blocks.Add(block);
panel = DocEx.GetItemsHost(block);
if (panel == null)
{
throw new Exception("ItemsHost not found. Did you forget to specify DocEx.IsItemsHost?");
}
}
}
}
var itemTemplate = ItemTemplateSelector != null?ItemTemplateSelector.SelectTemplate(data, this) : ItemTemplate;
var elements = LoadDataTemplate(itemTemplate);
foreach (var element in elements)
{
element.DataContext = data;
var expressions = element.GetValue(DocEx.ForceRefreshExpressionProperty);
if (expressions != null)
{
var bindings = expressions as List <BindingToSet>;
if (bindings != null)
{
foreach (var binding in bindings)
{
if (binding.Binding.Source == null && binding.Binding.RelativeSource == null)
{
binding.Binding.Source = data;
}
var frameworkElement = binding.DependencyObject as FrameworkElement;
if (frameworkElement != null)
{
frameworkElement.SetBinding(binding.Property, binding.Binding);
}
else
{
var frameworkContentElement = binding.DependencyObject as FrameworkContentElement;
if (frameworkContentElement != null)
{
frameworkContentElement.SetBinding(binding.Property, binding.Binding);
}
}
}
}
}
var section = panel as Section;
var paragraph = panel as Paragraph;
var inline = element as Inline;
var tableRowGroup = panel as TableRowGroup;
var tableRow = element as TableRow;
var list = panel as List;
var listItem = element as ListItem;
if (section != null)
{
section.Blocks.Add(ConvertToBlock(data, element));
}
else if (paragraph != null && inline != null)
{
if (inline.Parent == null)
{
paragraph.Inlines.Add(inline);
}
}
else if (tableRowGroup != null && tableRow != null)
{
if (tableRow.Parent == null)
{
tableRowGroup.Rows.Add(tableRow);
}
}
else if (list != null && listItem != null)
{
if (listItem.Parent == null)
{
list.ListItems.Add(listItem);
}
}
else if (panel != null)
{
throw new Exception(String.Format("Can't add an instance of {0} to an instance of {1}", element.GetType(), panel.GetType()));
}
else
{
throw new Exception("Unable to add child elements.");
}
}
}
}
protected virtual void ItemsModel3D_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Replace:
case NotifyCollectionChangedAction.Remove:
if (e.OldItems != null)
{
if (_tryExperiment && IsPanelHookerView && IsUnhookingPanel(e))
{
var key = e.OldItems[0];
if (elementDict.TryGetValue(key, out Element3D element))
{
Children.Remove(element);
elementDict.Remove(key);
_transferElements.Add(key, element);
}
}
else
{
foreach (var item in e.OldItems)
{
Element3D element;
if (elementDict.TryGetValue(item, out element))
{
Children.Remove(element);
elementDict.Remove(item);
}
}
}
//foreach (var item in e.OldItems)
//{
// Element3D element;
// if (elementDict.TryGetValue(item, out element))
// {
// Children.Remove(element);
// elementDict.Remove(item);
// }
//}
InvalidateRender();
}
break;
case NotifyCollectionChangedAction.Reset:
Clear();
break;
}
switch (e.Action)
{
case NotifyCollectionChangedAction.Reset:
if (this.ItemsSource != null)
{
if (this.ItemTemplate == null)
{
if (ItemTemplateSelector != null)
{
foreach (var item in this.ItemsSource)
{
var dataTemplate = ItemTemplateSelector.SelectTemplate(item, null);
var model = dataTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
else
{
foreach (var item in this.ItemsSource)
{
var model = item as Element3D;
if (model != null)
{
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
else
{
foreach (var item in this.ItemsSource)
{
var model = this.ItemTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
InvalidateRender();
break;
case NotifyCollectionChangedAction.Add:
case NotifyCollectionChangedAction.Replace:
if (e.NewItems != null)
{
if (this.ItemTemplate != null)
{
//foreach (var item in e.NewItems)
//{
// var model = this.ItemTemplate.LoadContent() as Element3D;
// if (model != null)
// {
// model.DataContext = item;
// this.Children.Add(model);
// elementDict.Add(item, model);
// }
// else
// {
// throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
// }
//}
if (_tryExperiment && IsPanelHookerView && IsHookingPanel(e))
{
var key = e.NewItems[0];
if (_transferElements.TryGetValue(key, out Element3D element))
{
Children.Add(element);
elementDict.Add(key, element);
_transferElements.Remove(key);
// provo a rinfrescare la traslazione
var me = key as MachineElements.ViewModels.Interfaces.IMachineElementViewModel;
element.Transform = me.Transform;
}
}
else
{
foreach (var item in e.NewItems)
{
var model = this.ItemTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
else
{
if (ItemTemplateSelector != null)
{
foreach (var item in e.NewItems)
{
var dataTemplate = ItemTemplateSelector.SelectTemplate(item, null);
var model = dataTemplate.LoadContent() as Element3D;
if (model != null)
{
model.DataContext = item;
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
else
{
foreach (var item in e.NewItems)
{
var model = item as Element3D;
if (model != null)
{
this.Children.Add(model);
elementDict.Add(item, model);
}
else
{
throw new InvalidOperationException("Cannot create a Model3D from ItemTemplate.");
}
}
}
}
}
break;
}
}
