protected void UpdateTarget(object value)
{
// We're called multiple times, for example when a resource dictionary changes.
// To avoid too many updates, we remember the last updated value.
if (ReferenceEquals(value, _lastUpdateValue))
{
return;
}
_lastUpdateValue = value;
object assignValue = MpfCopyManager.DeepCopyCutLVPs(value);
if (assignValue is DependencyObject && _targetDataDescriptor.TargetObject is DependencyObject)
{
((DependencyObject)assignValue).LogicalParent = (DependencyObject)_targetDataDescriptor.TargetObject;
}
#if DEBUG_DRME
DebugOutput("Setting target value to '{0}'", assignValue);
#endif
object assignValueConverted = TypeConverter.Convert(assignValue, _targetDataDescriptor.DataType);
if (!ReferenceEquals(assignValue, assignValueConverted) && !ReferenceEquals(assignValue, value))
{
MPF.TryCleanupAndDispose(assignValue);
}
_contextObject.SetBindingValue(_targetDataDescriptor, assignValueConverted);
// If we cannot find any UI element to pass the bindings to, we don't activate them. This means bindings, which are bound to
// an object which doesn't have an UI element in its logical tree, cannot be activated.
}
protected override FrameworkElement PrepareItemContainer(object dataItem)
{
// ReSharper disable UseObjectOrCollectionInitializer
TreeViewItem container = new TreeViewItem
// ReSharper restore UseObjectOrCollectionInitializer
{
Content = dataItem,
Context = dataItem,
ForceExpander = ForceExpander,
Screen = Screen,
ElementState = _elementState,
LogicalParent = this,
};
// Set this after the other properties have been initialized to avoid duplicate work
container.Style = MpfCopyManager.DeepCopyCutLVPs(ItemContainerStyle);
container.ContentTemplate = MpfCopyManager.DeepCopyCutLVPs(ItemTemplate);
// Re-use some properties for our children
container.ItemContainerStyle = MpfCopyManager.DeepCopyCutLVPs(ItemContainerStyle);
container.ItemsPanel = MpfCopyManager.DeepCopyCutLVPs(ItemsPanel);
container.ItemTemplate = MpfCopyManager.DeepCopyCutLVPs(ItemTemplate);
container.SubItemsProvider = MpfCopyManager.DeepCopyCutLVPs(SubItemsProvider);
return(container);
}
public static object FindResourceInParserContext(object resourceKey, IParserContext context)
{
object result = null;
// Step up the parser's context stack to find the resource.
// The logical tree is not yet defined at the load time of the
// XAML file. This is the reason why we have to step up the parser's context
// stack. We will have to simulate the process of finding a resource
// which is normally done by UIElement.FindResource(string).
// The parser's context stack maintains a dictionary of current keyed
// elements for each stack level because the according resource
// dictionaries are not built yet.
foreach (ElementContextInfo current in context.ContextStack)
{
if (current.TryGetKeyedElement(resourceKey, out result) ||
// Don't call UIElement.FindResource here, because the logical tree
// may be not set up yet.
(current.Instance is UIElement && ((UIElement)current.Instance).Resources.TryGetValue(resourceKey, out result)) ||
(current.Instance is ResourceDictionary && ((ResourceDictionary)current.Instance).TryGetValue(resourceKey, out result)))
{
break;
}
}
if (result == null)
{
return(null);
}
// We do a copy of the result to avoid later problems when the property where the result is assigned to is copied.
// If we don't cut the result's logical parent, a deep copy of the here assigned property would still reference
// the static resource's logical parent, which would copy an unnecessary big tree.
// And we cannot simply clean the logical parent of the here found resource because we must not change it.
// So we must do a copy where we cut the logical parent.
return(MpfCopyManager.DeepCopyCutLVPs(result));
}
internal void OnContentChanged(AbstractProperty prop, object oldValue)
{
object content = Content;
MPF.TryCleanupAndDispose(oldValue);
if (!ReferenceEquals(oldValue, _convertedContent))
{
MPF.TryCleanupAndDispose(_convertedContent);
}
object convertedContent;
// Try to unwrap ResourceWrapper before _convertedContent is accessed elsewhere.
// That's the only function we need from the ConvertType method, that's why we only call MPF.ConvertType
// instead of TypeConverter.Convert.
if (!MPF.ConvertType(content, typeof(object), out convertedContent))
{
convertedContent = content;
}
_convertedContent = ReferenceEquals(content, convertedContent) ? MpfCopyManager.DeepCopySetLVPs(convertedContent, this, this) : convertedContent;
if (ContentTemplate == null)
{
// No ContentTemplate set
InstallAutomaticContentDataTemplate();
}
FrameworkElement templateControl = _templateControl;
if (!(_convertedContent is FrameworkElement) && templateControl != null) // If our content is a FrameworkElement itself, it should only be used as template control but not as context
// The controls in the DataTemplate access their "data" via their data context, so we must assign it
{
templateControl.Context = _convertedContent;
}
}
protected void InitializeContentPresenter()
{
if (!_contentPresenterInvalid)
{
return;
}
if (!PreparingOrRunning)
{
return;
}
object content = Content;
if (content == null)
{
// In default skin, we have the constellation that a Button is used as template control inside a ListViewItem;
// thus the Button's ContentPresenter gets used twice: First as presenter for the Button's Content (which is null in that case)
// and second as presenter for the ListViewItem's Content (which is the actual content to be set).
// If we don't ensure that content != null, the Button resets it's ContentPresenter's Content to null
return;
}
ContentPresenter presenter = FindContentPresenter();
if (presenter == null)
{
return;
}
_contentPresenterInvalid = false;
presenter.HorizontalContentAlignment = HorizontalContentAlignment;
presenter.VerticalContentAlignment = VerticalContentAlignment;
presenter.ContentTemplate = MpfCopyManager.DeepCopyCutLVPs(ContentTemplate); // Setting LogicalParent is not necessary because DataTemplate doesn't bind bindings
presenter.Content = MpfCopyManager.DeepCopyCutLVPs(content);
}
public IBinding CopyAndRetarget(IDataDescriptor newDd)
{
IDictionary <object, object> exceptionalIdentities = new Dictionary <object, object>
{
{ LogicalParent, null }
};
if (_contextObject != null)
{
exceptionalIdentities.Add(_contextObject, newDd.TargetObject);
}
IDataDescriptor targetSave = _targetDataDescriptor;
try
{
_targetDataDescriptor = null; // We have to detach temporarily, else the copy won't work
BindingBase result = MpfCopyManager.DeepCopyWithIdentities(this, exceptionalIdentities);
result.SetTargetDataDescriptor(newDd);
return(result);
}
finally
{
// Restore this binding attachment
_targetDataDescriptor = targetSave;
}
}
public void UpdateTarget()
{
object convertedValue;
if (!Convert(_sourceDd.Value, _targetDd.DataType, out convertedValue))
{
return;
}
if (ReferenceEquals(_sourceDd.Value, convertedValue))
{
convertedValue = MpfCopyManager.DeepCopyCutLVPs(convertedValue);
}
if (_targetObject != null)
{
_targetObject.SetBindingValue(_targetDd, convertedValue);
}
else
{
_targetDd.Value = convertedValue;
}
if (_notifyOnTargetUpdated && _parentUiElement != null)
{
_parentUiElement.RaiseEvent(new DataTransferEventArgs(BindingExtension.TargetUpdatedEvent, _parentUiElement, _targetDd));
}
}
private void SetTimeIndicator()
{
if (_timeIndicatorControl == null)
{
_timeIndicatorControl = new Control {
LogicalParent = this
};
// Deep copy the styles to each program button.
_timeIndicatorControl.Template = MpfCopyManager.DeepCopyCutLVPs(TimeIndicatorTemplate);
SetRow(_timeIndicatorControl, 0);
SetRowSpan(_timeIndicatorControl, _numberOfRows);
Children.Add(_timeIndicatorControl);
}
DateTime viewportStart = SlimTvMultiChannelGuideModel.GuideStartTime;
int currentTimeColumn = (int)Math.Round((DateTime.Now - viewportStart).TotalMinutes / _perCellTime) + 1; // Header offset
if (currentTimeColumn <= 1 || currentTimeColumn > _numberOfColumns + 1) // Outside viewport
{
_timeIndicatorControl.IsVisible = false;
}
else
{
_timeIndicatorControl.IsVisible = true;
SetZIndex(_timeIndicatorControl, 100);
SetColumn(_timeIndicatorControl, currentTimeColumn);
_timeIndicatorControl.InvalidateLayout(true, true); // Required to arrange control on new position
}
}
protected void InitializeContentPresenter()
{
ContentPresenter presenter = FindContentPresenter();
if (presenter != null)
{
presenter.ContentTemplate = MpfCopyManager.DeepCopyCutLVPs(ContentTemplate);
}
}
private void CreateGroupButton()
{
Control btnGroup = CreateControl(null);
SetGrid(btnGroup, 0, 0, 1, _numberOfRows);
// Deep copy the styles to each program button.
btnGroup.Template = MpfCopyManager.DeepCopyCutLVPs(GroupButtonTemplate);
Children.Add(btnGroup);
}
protected object FindResourceInTheme(string resourceKey, IParserContext context)
{
object result = SkinContext.SkinResources.FindStyleResource(resourceKey);
if (result == null)
{
return(null);
}
// See comment about the copying in method ResourceDictionary.FindResourceInParserContext()
return(MpfCopyManager.DeepCopyCutLVPs(result));
}
/// <summary>
/// Tries to find an existing control for given <paramref name="program"/> in the Grid row with index <paramref name="rowIndex"/>.
/// If no control was found, this method creates a new control and adds it to the Grid.
/// </summary>
/// <param name="program">Program.</param>
/// <param name="rowIndex">RowIndex.</param>
/// <returns>Control.</returns>
private Control GetOrCreateControl(ProgramListItem program, int rowIndex)
{
Control control = GetRowItems(rowIndex).FirstOrDefault(el => ((ProgramListItem)el.Context).Program.ProgramId == program.Program.ProgramId);
if (control != null)
{
return(control);
}
control = CreateControl(program);
// Deep copy the styles to each program button.
control.Template = MpfCopyManager.DeepCopyCutLVPs(ProgramTemplate);
Children.Add(control);
return(control);
}
public UIElement LoadContent()
{
if (_templateElement == null)
return null;
MpfCopyManager cm = new MpfCopyManager();
cm.AddIdentity(this, null);
FrameworkElement result = cm.GetCopy(_templateElement);
NameScope ns = (NameScope) cm.GetCopy(_templateElement.TemplateNameScope);
result.Resources.Merge(Resources);
if (_names != null)
foreach (KeyValuePair<string, object> nameRegistration in _names)
ns.RegisterName(nameRegistration.Key, cm.GetCopy(nameRegistration.Value));
cm.FinishCopy();
return result;
}
/// <summary>
/// Will be called to evaluate our source value based on all available
/// property and context states.
/// This method will also be automatically re-called when any object involved in the
/// evaluation process of our source value was changed.
/// </summary>
/// <returns><c>true</c>, if the source value based on all input data
/// could be evaluated, else <c>false</c>.</returns>
protected bool UpdateSourceValue()
{
if (_isUpdatingSourceValue)
{
return(false);
}
_isUpdatingSourceValue = true;
bool sourceValueValid = false;
try
{
object result;
bool copy = false;
lock (_syncObj)
{
IDataDescriptor[] values;
if (!GetSourceValues(out values))
{
// Do nothing if not all necessary child bindings can be resolved at the current time
return(false);
}
if (_converter == null)
{
throw new XamlBindingException("MultiBindingMarkupExtension: Converter must be set");
}
Type targetType = _targetDataDescriptor == null ? typeof(object) : _targetDataDescriptor.DataType;
if (!_converter.Convert(values, targetType, ConverterParameter, out result))
{
return(false);
}
copy = values.Any(dd => dd != null && ReferenceEquals(dd.Value, result));
IsSourceValueValid = sourceValueValid = true;
}
object oldValue = _evaluatedSourceValue.SourceValue;
// Set the binding's value outside the lock to comply with the MP2 threading policy
_evaluatedSourceValue.SourceValue = new ValueDataDescriptor(copy ? MpfCopyManager.DeepCopyCutLVPs(result) : result);
if (oldValue != null)
{
MPF.TryCleanupAndDispose(oldValue);
}
return(true);
}
finally
{
IsSourceValueValid = sourceValueValid;
_isUpdatingSourceValue = false;
}
}
public override void Set(UIElement element)
{
IDataDescriptor dd;
DependencyObject targetObject;
if (!FindPropertyDescriptor(element, out dd, out targetObject))
{
return;
}
SetterData setterData = GetSetterData(targetObject);
if (setterData != null)
{
// If any setter is currently setting our property, we don't want to interfere
return;
}
object obj;
// The next lines are necessary because the render thread is setting our values.
// If there's still a value pending to be set by the render thread, we would get an old, obsolete value if
// we just copied dd.Value to _originalValue.
element.GetPendingOrCurrentValue(dd, out obj);
SetSetterData(targetObject, new SetterData(obj));
object value = Value;
if (TypeConverter.Convert(value, dd.DataType, out obj))
{
if (ReferenceEquals(value, obj))
{
SetDataDescriptorValueWithLP(dd, MpfCopyManager.DeepCopyCutLVPs(obj));
}
else
{
// Avoid creating a copy twice
SetDataDescriptorValueWithLP(dd, obj);
}
}
else
{
// Value is not compatible: We cannot execute
ServiceRegistration.Get <ILogger>().Warn("Setter for property '{0}': Cannot convert value {1} to target type {2}", _propertyName,
value == null ? "'null'" : ("of type " + value.GetType().Name), dd.DataType.Name);
return;
}
}
protected FrameworkElement PrepareGroupHeader(GroupHeaderItem headerItem, FrameworkElement lvParent)
{
var result = new ListViewGroupHeader()
{
Context = headerItem,
Content = headerItem,
Screen = _parent.Screen,
VisualParent = lvParent,
LogicalParent = lvParent
};
// Set this after the other properties have been initialized to avoid duplicate work
// No need to set the LogicalParent because styles and content templates don't bind bindings
result.Style = MpfCopyManager.DeepCopyCutLVPs(GroupHeaderContainerStyle);
result.ContentTemplate = MpfCopyManager.DeepCopyCutLVPs(GroupHeaderTemplate);
return(result);
}
protected override FrameworkElement PrepareItemContainer(object dataItem)
{
// ReSharper disable UseObjectOrCollectionInitializer
ListViewItem container = new ListViewItem
// ReSharper restore UseObjectOrCollectionInitializer
{
Context = dataItem,
Content = dataItem,
Screen = Screen,
ElementState = _elementState,
LogicalParent = this,
};
// Set this after the other properties have been initialized to avoid duplicate work
container.Style = MpfCopyManager.DeepCopyCutLVPs(ItemContainerStyle) ?? container.CopyDefaultStyle();
container.ContentTemplate = MpfCopyManager.DeepCopyCutLVPs(ItemTemplate);
return(container);
}
protected FrameworkElement PrepareItem(object dataItem, FrameworkElement lvParent)
{
// ReSharper disable UseObjectOrCollectionInitializer
ListViewItem result = new ListViewItem
// ReSharper restore UseObjectOrCollectionInitializer
{
Context = dataItem,
Content = dataItem,
Screen = _parent.Screen,
VisualParent = lvParent,
LogicalParent = lvParent
};
// Set this after the other properties have been initialized to avoid duplicate work
// No need to set the LogicalParent because styles and content templates don't bind bindings
result.Style = MpfCopyManager.DeepCopyCutLVPs(ItemContainerStyle);
result.ContentTemplate = MpfCopyManager.DeepCopyCutLVPs(ItemTemplate);
return(result);
}
public void Initialize(FrameworkElement parent, IEnumerable <object> itemsSource, Style itemContainerStyle, DataTemplate itemTemplate)
{
_parent = parent;
if (_materializedItems != null)
{
DisposeItems();
}
_items = new List <object>(itemsSource);
_materializedItems = new List <FrameworkElement>(_items.Count);
for (int i = 0; i < _items.Count; i++)
{
_materializedItems.Add(null);
}
MPF.TryCleanupAndDispose(_itemContainerStyle);
MPF.TryCleanupAndDispose(_itemTemplate);
// No need to set the LogicalParent at styles or data templates because they don't bind bindings
_itemContainerStyle = MpfCopyManager.DeepCopyCutLVPs(itemContainerStyle);
_itemTemplate = MpfCopyManager.DeepCopyCutLVPs(itemTemplate);
}
private Visuals.Control CreateControl(int index)
{
if (IsReadOnly)
{
return(new Star
{
/*Star*/
Template = MpfCopyManager.DeepCopyCutLVPs(StarReadOnlyTemplate),
Focusable = false
});
}
else
{
return(new CheckBox
{
Template = MpfCopyManager.DeepCopyCutLVPs(StarTemplate),
Checked = new CommandBridge(new MethodDelegateCommand(() => Toggle(index, true))),
Unchecked = new CommandBridge(new MethodDelegateCommand(() => Toggle(index, false)))
});
}
}
public void UpdateTarget()
{
object convertedValue;
if (!Convert(_sourceDd.Value, _targetDd.DataType, out convertedValue))
{
return;
}
if (ReferenceEquals(_sourceDd.Value, convertedValue))
{
convertedValue = MpfCopyManager.DeepCopyCutLVPs(convertedValue);
}
if (_targetObject != null)
{
_targetObject.SetBindingValue(_targetDd, convertedValue);
}
else
{
_targetDd.Value = convertedValue;
}
}
private HeaderItemWrapper GetGroupHeader(int itemIndex)
{
var headerWrapper = _materializedGroupHeaders[itemIndex];
if (headerWrapper != null)
{
return(headerWrapper);
}
if (_groupingValueProvider != null)
{
headerWrapper = new HeaderItemWrapper(_groupingValueProvider.GetGroupingValue(_items[itemIndex]));
}
else
{
// to get the grouping value of the item we use a dummy header item and apply the DataContext and group value binding to it
if (_getValueGroupHeader == null)
{
_getValueGroupHeader = new GroupHeaderItem();
var dd = new SimplePropertyDataDescriptor(_getValueGroupHeader, typeof(GroupHeaderItem).GetProperty("GroupingValue"));
var binding = MpfCopyManager.DeepCopyCutLVPs(_groupPropertyBinding);
binding.SetTargetDataDescriptor(dd);
binding.Activate();
}
_getValueGroupHeader.DataContext = new BindingExtension()
{
Source = _items[itemIndex],
Path = "."
};
// then we create the actual header item and apply the value to it
headerWrapper = new HeaderItemWrapper(_getValueGroupHeader.GroupingValue);
// finally cleanup the datacontext binding
MPF.TryCleanupAndDispose(_getValueGroupHeader.DataContext);
_getValueGroupHeader.DataContext = null;
}
_materializedGroupHeaders[itemIndex] = headerWrapper;
return(headerWrapper);
}
/// <summary>
/// Worker method to apply all setters on the specified <paramref name="element"/> which
/// have not been set yet. The set of properties already assigned will be given in parameter
/// <paramref name="finishedProperties"/>; all properties whose names are stored in this
/// parameter will be skipped.
/// </summary>
/// <param name="element">The UI element this style will be applied on.</param>
/// <param name="finishedProperties">Set of property names which should be skipped.</param>
/// <param name="triggers">Returns a collection of triggers which should be added to the <paramref name="element"/>.</param>
protected void UpdateSettersAndCollectTriggers(UIElement element,
ICollection <string> finishedProperties, ICollection <TriggerBase> triggers)
{
foreach (SetterBase sb in _setters)
{
string propertyKey = sb.UnambiguousPropertyName;
if (finishedProperties.Contains(propertyKey))
{
continue;
}
finishedProperties.Add(propertyKey);
sb.Set(element);
}
if (_basedOn != null)
{
_basedOn.UpdateSettersAndCollectTriggers(element, finishedProperties, triggers);
}
foreach (TriggerBase trigger in Triggers)
{
triggers.Add(MpfCopyManager.DeepCopySetLVPs(trigger, element, null));
}
}
public UIElement LoadContent()
{
if (_templateElement == null)
{
return(null);
}
MpfCopyManager cm = new MpfCopyManager();
cm.AddIdentity(this, null);
FrameworkElement result = cm.GetCopy(_templateElement);
NameScope ns = (NameScope)cm.GetCopy(_templateElement.TemplateNameScope);
result.Resources.Merge(Resources);
if (_names != null)
{
foreach (KeyValuePair <string, object> nameRegistration in _names)
{
ns.RegisterName(nameRegistration.Key, cm.GetCopy(nameRegistration.Value));
}
}
cm.FinishCopy();
return(result);
}
public UIElement LoadContent(UIElement triggerParent)
{
if (_templateElement == null)
{
return(null);
}
MpfCopyManager cm = new MpfCopyManager();
cm.AddIdentity(this, null);
FrameworkElement result = cm.GetCopy(_templateElement);
NameScope ns = (NameScope)cm.GetCopy(_templateElement.TemplateNameScope);
result.Resources.Merge(Resources);
if (_names != null)
{
foreach (KeyValuePair <string, object> nameRegistration in _names)
{
ns.RegisterName(nameRegistration.Key, cm.GetCopy(nameRegistration.Value));
}
}
triggerParent.UninitializeTriggers();
ICollection <TriggerBase> triggers = triggerParent.Triggers;
foreach (TriggerBase t in Triggers)
{
TriggerBase trigger = cm.GetCopy(t);
triggers.Add(trigger);
// Trigger will automatically be set-up (_initializeTriggers is initially set to true in result)
}
cm.FinishCopy();
// Setting the logical parent has to be done after the copy process has finished - else the logical parent will be overridden
foreach (TriggerBase t in triggers)
{
t.LogicalParent = result;
}
return(result);
}
public void Initialize(FrameworkElement parent, IEnumerable <object> itemsSource, Style itemContainerStyle, DataTemplate itemTemplate,
IGroupingValueProvider groupingValueProvider, IBinding groupPropertyBinding, Style groupHeaderContainerStyle, DataTemplate groupHeaderTemplate)
{
_parent = parent;
DisposeItems();
_items = new List <object>(itemsSource);
_materializedItems = new List <FrameworkElement>(_items.Count);
for (int i = 0; i < _items.Count; i++)
{
_materializedItems.Add(null);
}
_groupInfos = null;
if ((groupingValueProvider != null && groupingValueProvider.IsGroupingActive) || groupPropertyBinding != null)
{
_materializedGroupHeaders = new HeaderItemWrapper[_items.Count];
}
MPF.TryCleanupAndDispose(_itemContainerStyle);
MPF.TryCleanupAndDispose(_itemTemplate);
// No need to set the LogicalParent at styles or data templates because they don't bind bindings
_itemContainerStyle = MpfCopyManager.DeepCopyCutLVPs(itemContainerStyle);
_itemTemplate = MpfCopyManager.DeepCopyCutLVPs(itemTemplate);
MPF.TryCleanupAndDispose(_groupHeaderContainerStyle);
MPF.TryCleanupAndDispose(_groupHeaderTemplate);
MPF.TryCleanupAndDispose(_groupPropertyBinding);
_groupingValueProvider = groupingValueProvider;
_groupPropertyBinding = MpfCopyManager.DeepCopyCutLVPs(groupPropertyBinding);
_groupHeaderContainerStyle = MpfCopyManager.DeepCopyCutLVPs(groupHeaderContainerStyle);
_groupHeaderTemplate = MpfCopyManager.DeepCopyCutLVPs(groupHeaderTemplate);
MPF.TryCleanupAndDispose(_getValueGroupHeader);
_getValueGroupHeader = null;
}
public UIElement LoadContent(UIElement triggerParent)
{
if (_templateElement == null)
return null;
MpfCopyManager cm = new MpfCopyManager();
cm.AddIdentity(this, null);
FrameworkElement result = cm.GetCopy(_templateElement);
NameScope ns = (NameScope) cm.GetCopy(_templateElement.TemplateNameScope);
result.Resources.Merge(Resources);
if (_names != null)
foreach (KeyValuePair<string, object> nameRegistration in _names)
ns.RegisterName(nameRegistration.Key, cm.GetCopy(nameRegistration.Value));
triggerParent.UninitializeTriggers();
ICollection<TriggerBase> triggers = triggerParent.Triggers;
foreach (TriggerBase t in Triggers)
{
TriggerBase trigger = cm.GetCopy(t);
triggers.Add(trigger);
// Trigger will automatically be set-up (_initializeTriggers is initially set to true in result)
}
cm.FinishCopy();
// Setting the logical parent has to be done after the copy process has finished - else the logical parent will be overridden
foreach (TriggerBase t in triggers)
t.LogicalParent = result;
return result;
}
protected virtual void PrepareItemsOverride(bool force)
{
if (_panelTemplateApplied && _itemsHostPanel != null && !force)
{
return;
}
// Check properties which are necessary in each case
if (ItemsPanel == null)
{
return;
}
ItemsPresenter presenter = FindItemsPresenter();
if (presenter == null)
{
return;
}
if (!_panelTemplateApplied)
{
_panelTemplateApplied = true;
presenter.ApplyTemplate(ItemsPanel);
_itemsHostPanel = null;
}
if (_itemsHostPanel == null)
{
_itemsHostPanel = presenter.ItemsHostPanel;
}
if (_itemsHostPanel == null)
{
return;
}
// Albert: We cannot exit the method if one of the styles is not set because the styles
// might be found by the SkinEngine's automatic Style assignment (FrameworkElement.CopyDefaultStyle)
//if (ItemContainerStyle == null || ItemTemplate == null)
// return;
IEnumerable itemsSource = ItemsSource;
if (itemsSource == null)
{ // In this case, we must set up the items control using the Items property
ItemCollection items = _items;
ItemCollection preparedChildren = new ItemCollection();
bool setItems = false;
if (items == null)
{
// Restore items from "ItemsSource mode" where they have been set to null
items = new ItemCollection();
setItems = true;
}
foreach (object item in items)
{
object itemCopy = MpfCopyManager.DeepCopyWithFixedObject(item, this); // Keep this object as LogicalParent
FrameworkElement element = itemCopy as FrameworkElement ?? PrepareItemContainer(itemCopy);
if (element.Style == null && element is ContentControl)
{
element.Style = ItemContainerStyle;
}
element.LogicalParent = this;
preparedChildren.Add(element);
}
presenter.SetDataStrings(BuildDataStrings(items));
SetPreparedItems(setItems, setItems ? items : null, true, preparedChildren);
}
else
{
IList <object> l = new List <object>();
ISynchronizable sync = itemsSource as ISynchronizable;
if (sync != null)
{
lock (sync.SyncRoot)
CollectionUtils.AddAll(l, itemsSource);
}
else
{
CollectionUtils.AddAll(l, itemsSource);
}
presenter.SetDataStrings(BuildDataStrings(l));
var vsp = _itemsHostPanel as IVirtualizingPanel;
if (vsp != null)
{
// In this case, the VSP will generate its items by itself
ListViewItemGenerator lvig = new ListViewItemGenerator();
lvig.Initialize(this, l, ItemContainerStyle, ItemTemplate,
GroupingValueProvider, GroupingBindingWrapper == null ? null : GroupingBindingWrapper.Binding, GroupHeaderContainerStyle, GroupHeaderTemplate);
SimplePropertyDataDescriptor dd;
if (SimplePropertyDataDescriptor.CreateSimplePropertyDataDescriptor(this, "IsEmpty", out dd))
{
SetValueInRenderThread(dd, l.Count == 0);
}
vsp.SetItemProvider(lvig);
SetPreparedItems(true, null, false, null);
}
else
{
ItemCollection preparedItems = new ItemCollection();
preparedItems.AddAll(l.Select(PrepareItemContainer));
SetPreparedItems(true, null, true, preparedItems);
}
}
}
protected virtual void PrepareItemsOverride(bool force)
{
if (_panelTemplateApplied && _itemsHostPanel != null && !force)
{
return;
}
// Check properties which are necessary in each case
if (ItemsPanel == null)
{
return;
}
ItemsPresenter presenter = FindItemsPresenter();
if (presenter == null)
{
return;
}
if (!_panelTemplateApplied)
{
_panelTemplateApplied = true;
presenter.ApplyTemplate(ItemsPanel);
_itemsHostPanel = null;
}
if (_itemsHostPanel == null)
{
_itemsHostPanel = presenter.ItemsHostPanel;
}
if (_itemsHostPanel == null)
{
return;
}
IEnumerable itemsSource = ItemsSource;
if (itemsSource == null)
{ // In this case, we must set up the items control using the Items property
ItemCollection items = _items;
ItemCollection preparedChildren = new ItemCollection();
bool setItems = false;
if (items == null)
{
// Restore items from "ItemsSource mode" where they have been set to null
items = new ItemCollection();
setItems = true;
}
foreach (object item in items)
{
object itemCopy = MpfCopyManager.DeepCopyWithFixedObject(item, this); // Keep this object as LogicalParent
FrameworkElement element = itemCopy as FrameworkElement ?? PrepareItemContainer(itemCopy);
if (element.Style == null)
{
element.Style = ItemContainerStyle;
}
element.LogicalParent = this;
preparedChildren.Add(element);
}
presenter.SetDataStrings(BuildDataStrings(items));
SetPreparedItems(setItems, setItems ? items : null, true, preparedChildren);
}
else
{
IList <object> l = new List <object>();
ISynchronizable sync = itemsSource as ISynchronizable;
if (sync != null)
{
lock (sync.SyncRoot)
CollectionUtils.AddAll(l, itemsSource);
}
else
{
CollectionUtils.AddAll(l, itemsSource);
}
presenter.SetDataStrings(BuildDataStrings(l));
VirtualizingStackPanel vsp = _itemsHostPanel as VirtualizingStackPanel;
if (vsp != null)
{
// In this case, the VSP will generate its items by itself
ListViewItemGenerator lvig = new ListViewItemGenerator();
lvig.Initialize(this, l, ItemContainerStyle, ItemTemplate);
IsEmpty = l.Count == 0;
vsp.SetItemProvider(lvig);
SetPreparedItems(true, null, false, null);
}
else
{
ItemCollection preparedItems = new ItemCollection();
preparedItems.AddAll(l.Select(PrepareItemContainer));
SetPreparedItems(true, null, true, preparedItems);
}
}
}
private bool CreateOrUpdateRow(bool updateOnly, ref int channelIndex, int rowIndex)
{
if (channelIndex >= ChannelsPrograms.Count)
{
return(false);
}
ChannelProgramListItem channel = ChannelsPrograms[channelIndex] as ChannelProgramListItem;
if (channel == null)
{
return(false);
}
// Default: take viewport from model
var model = SlimTvMultiChannelGuideModel;
if (model == null)
{
return(false);
}
DateTime viewportStart = model.GuideStartTime;
DateTime viewportEnd = model.GuideEndTime;
int colIndex = GroupButtonEnabled ? 1 : 0;
if (!updateOnly)
{
Control btnHeader = CreateControl(channel);
SetGrid(btnHeader, colIndex, rowIndex, 1);
// Deep copy the styles to each program button.
btnHeader.Template = MpfCopyManager.DeepCopyCutLVPs(HeaderTemplate);
Children.Add(btnHeader);
}
int colSpan = 0;
DateTime?lastStartTime = null;
DateTime?lastEndTime = viewportStart;
#if DEBUG_LAYOUT
// Debug layouting:
if (rowIndex == 0)
{
ServiceRegistration.Get <ILogger>().Debug("EPG: Viewport: {0}-{1} PerCell: {2} min", viewportStart.ToShortTimeString(), viewportEnd.ToShortTimeString(), _perCellTime);
}
#endif
if (updateOnly)
{
// Remove all programs outside of viewport.
DateTime start = viewportStart;
DateTime end = viewportEnd;
var removeList = GetRowItems(rowIndex).Where(el =>
{
ProgramListItem p = (ProgramListItem)el.Context;
return(p.Program.EndTime <= start || p.Program.StartTime >= end || channel.Channel.ChannelId != ((IProgram)p.AdditionalProperties["PROGRAM"]).ChannelId ||
p is PlaceholderListItem);
}).ToList();
removeList.ForEach(Children.Remove);
}
colIndex++; // After header (and optional GroupButton)
int programIndex = 0;
while (programIndex < channel.Programs.Count && colIndex <= _numberOfColumns)
{
ProgramListItem program = channel.Programs[programIndex] as ProgramListItem;
if (program == null || program.Program.StartTime > viewportEnd)
{
break;
}
// Ignore programs outside viewport and programs that start at same time (duplicates)
if (program.Program.EndTime <= viewportStart || (lastStartTime.HasValue && lastStartTime.Value == program.Program.StartTime))
{
programIndex++;
continue;
}
lastStartTime = program.Program.StartTime;
CalculateProgamPosition(program, viewportStart, viewportEnd, ref colIndex, ref colSpan, ref lastEndTime);
Control btnEpg = GetOrCreateControl(program, rowIndex);
SetGrid(btnEpg, colIndex, rowIndex, colSpan);
programIndex++;
colIndex += colSpan; // Skip spanned columns.
}
channelIndex++;
return(true);
}
protected virtual bool UpdateBinding()
{
// Avoid recursive calls: For instance, this can occur when
// the later call to Evaluate will change our evaluated source value, which
// will cause a recursive call to UpdateBinding.
if (_isUpdatingBinding)
{
return(false);
}
_isUpdatingBinding = true;
try
{
if (KeepBinding) // This is the case if our target descriptor has a binding type
{ // In this case, this instance should be used rather than the evaluated source value
if (_targetDataDescriptor != null)
{
_contextObject.SetBindingValue(_targetDataDescriptor, this);
}
_valueAssigned = true;
return(true);
}
IDataDescriptor sourceDd;
if (!Evaluate(out sourceDd))
{
_valueAssigned = false;
return(false);
}
// We're called multiple times, for example when a resource dictionary changes.
// To avoid too many updates, we remember the last updated value.
if (ReferenceEquals(sourceDd, _lastUpdatedValue) && !_valueAssigned)
{
return(true);
}
_lastUpdatedValue = sourceDd;
#if DEBUG_BINDINGS
DebugOutput("UpdateBinding: Binding evaluated to '{0}'", sourceDd.Value);
#endif
if (_bindingDependency != null)
{
_bindingDependency.Detach();
}
bool attachToSource = false;
bool attachToTarget = false;
switch (Mode)
{
case BindingMode.Default:
case BindingMode.OneWay:
// Currently, we don't really support the Default binding mode in
// MediaPortal skin engine. Maybe we will support it in future -
// then we'll be able to initialize the mode with a default value
// implied by our target data endpoint.
attachToSource = true;
break;
case BindingMode.TwoWay:
attachToSource = true;
attachToTarget = true;
break;
case BindingMode.OneWayToSource:
attachToTarget = true;
break;
case BindingMode.OneTime:
object value = sourceDd.Value;
object convertedValue;
if (!Convert(value, _targetDataDescriptor.DataType, out convertedValue))
{
return(false);
}
_contextObject.SetBindingValue(_targetDataDescriptor,
ReferenceEquals(value, convertedValue) ? MpfCopyManager.DeepCopyCutLVPs(convertedValue) : convertedValue);
_valueAssigned = true;
Dispose(true);
return(true); // In this case, we have finished with only assigning the value
}
DependencyObject parent;
if (UpdateSourceTrigger != UpdateSourceTrigger.LostFocus ||
!FindAncestor(_contextObject, out parent, FindParentMode.HybridPreferVisualTree, -1, typeof(UIElement)))
{
parent = null;
}
_bindingDependency = new BindingDependency(sourceDd, _targetDataDescriptor, attachToSource,
attachToTarget ? UpdateSourceTrigger : UpdateSourceTrigger.Explicit,
parent as UIElement, _valueConverter, _converterParameter);
_valueAssigned = true;
return(true);
}
finally
{
_isUpdatingBinding = false;
}
}
/// <summary>
/// Merges the resources in the given resource dictionary to this resource dictionary. That means, the given dict
/// will be copied and then the copy will be used as parameter for <see cref="TakeOver"/>.
/// instance.
/// </summary>
/// <param name="dict">Resource dictionary whose contents should be merged.</param>
public void Merge(ResourceDictionary dict)
{
// No need to set the LogicalParent at the result because we don't bind bindings in ResourceDictionary
TakeOver(MpfCopyManager.DeepCopyCutLVPs(dict), false, true);
}