protected void SetTargetItemValue([NotNull] TTargetItem targetItem, [CanBeNull] object targetItemValue)
{
if (targetItemValue == BindingValue.UnsetValue)
{
if (FallbackValue != null)
{
targetItemValue = FallbackValue.Value;
}
else
{
if (!SourceItemBinding.TryGetItem(out _))
{
Log("Source item is null and fallback value is not set. " +
"This may lead to diplaying value from the previous source item. " +
"Set fallback value to override previous one.");
}
}
}
if (targetItemValue != BindingValue.UnsetValue)
{
try
{
TargetItemBinding.SetValue(targetItem, (TTargetItemValue)targetItemValue, _compositeItemBindingMode == BindingMode.TwoWay);
}
catch (Exception ex)
{
Log($"An \"{LogFormatter.FormatException(ex)}\" exception occurred while executing " +
$"\"{LogFormatter.FormatTypeName(TargetItemBinding)}.{nameof(TargetItemBinding.SetValue)}\" method.");
}
}
}
internal CompositeItemCommandBinding(
[NotNull] SourceItemCommandBinding <TSourceItem, TSourceItemValue> sourceItemCommandBinding,
[NotNull] TargetItemBinding <TTargetItem, TTargetItemValue> targetItemBinding,
BindingMode requestedBindingMode,
[NotNull] ICompositeItemBindingValueConverter valueConverter)
: base(sourceItemCommandBinding, targetItemBinding, requestedBindingMode, valueConverter)
{
}
internal TargetItemCommandBinding(
[NotNull] TargetItemBinding <TCommandTriggerItem, TCommandTriggerItemValue> commandTriggerItemBinding,
[NotNull] TargetItemBinding <TCommandParameterItem, TCommandPatameterItemValue> commandParameterItemBinding)
: base(commandTriggerItemBinding.GetItemReference(), commandTriggerItemBinding.ItemValuePathAccessor)
{
_commandTriggerItemBinding = commandTriggerItemBinding;
_commandParameterItemBinding = commandParameterItemBinding;
}
public void Dispose()
{
UnsubscribeFromSourceItemEvents();
UnsubscribeFromTargetItemEvents();
SourceItemBinding.Dispose();
TargetItemBinding.Dispose();
}
internal TargetItemCustomValueBinding(
[NotNull] TargetItemBinding <TItem, TValue> targetItemBinding,
[CanBeNull] TCustomValue customValue)
: base(targetItemBinding.ItemReference, targetItemBinding.ItemValuePathAccessor)
{
_targetItemBinding = targetItemBinding;
_customValue = customValue;
}
internal SourceItemBindingBuilder(
[NotNull] ItemReference <TSourceItem> sourceItemReference,
[NotNull] TargetItemBinding <TTargetItem, TTargetItemValue> targetItemBinding,
[NotNull] BindingSet <TSourceItem> bindingSet)
{
_sourceItemReference = sourceItemReference;
_targetItemBinding = targetItemBinding;
_bindingSet = bindingSet;
}
protected CompositeItemBindingBase(
[NotNull] SourceItemBinding <TSourceItem, TSourceItemValue> sourceItemBinding,
[NotNull] TargetItemBinding <TTargetItem, TTargetItemValue> targetItemBinding,
BindingMode requestedBindingMode,
[NotNull] CompositeItemBindingValueConverter <TSourceItem> valueConverter)
{
SourceItemBinding = sourceItemBinding;
TargetItemBinding = targetItemBinding;
RequestedBindingMode = requestedBindingMode;
ValueConverter = valueConverter;
SetLogger();
}
internal CompositeItemBindingBuilder(
[NotNull] SourceItemBinding <TSourceItem, TSourceItemValue> sourceItemBinding,
[NotNull] TargetItemBinding <TTargetItem, TTargetItemValue> targetItemBinding,
[NotNull] BindingSet <TSourceItem> bindingSet)
{
_compositeItemBinding = new CompositeItemBinding <TSourceItem, TSourceItemValue, TTargetItem, TTargetItemValue>(
sourceItemBinding,
targetItemBinding,
BindingMode.TwoWay,
new CompositeItemBindingValueConverter <DefaultValueConverter>());
bindingSet.Add(_compositeItemBinding);
}
internal CompositeItemCommandBindingBuilder(
[NotNull] SourceItemCommandBinding <TSourceItem, TSourceItemValue> sourceItemBinding,
[NotNull] TargetItemBinding <TTargetItem, TTargetItemValue> targetItemBinding,
[NotNull] BindingSet <TSourceItem> bindingSet)
{
_compositeItemBinding = new CompositeItemCommandBinding <TSourceItem, TSourceItemValue, TTargetItem, TTargetItemValue>(
sourceItemBinding,
targetItemBinding,
BindingMode.OneWayToSource,
new CompositeItemBindingValueConverter <TSourceItem>(typeof(DefaultValueConverter)));
_bindingSet = bindingSet;
_bindingSet.Add(_compositeItemBinding);
}
internal CompositeItemCommandBindingBuilder(
[NotNull] SourceItemCommandBinding <TSourceItem, TSourceItemValue> sourceItemBinding,
[NotNull] TargetItemBinding <TTargetItem, TTargetItemValue> targetItemBinding,
[NotNull] BindingSet <TSourceItem> bindingSet,
[NotNull] ICompositeItemBinding <TSourceItem> oldCompositeItemBinding)
{
_compositeItemBinding = new CompositeItemCommandBinding <TSourceItem, TSourceItemValue, TTargetItem, TTargetItemValue>(
sourceItemBinding,
targetItemBinding,
oldCompositeItemBinding.RequestedBindingMode,
oldCompositeItemBinding.ValueConverter);
_bindingSet = bindingSet;
_bindingSet.Remove(oldCompositeItemBinding);
_bindingSet.Add(_compositeItemBinding);
}
protected bool TryGetTargetItemValue([NotNull] TTargetItem targetItem, out TTargetItemValue targetItemValue)
{
try
{
return(TargetItemBinding.TryGetValue(targetItem, out targetItemValue));
}
catch (Exception ex)
{
Log($"An \"{LogFormatter.FormatException(ex)}\" exception occurred while executing " +
$"\"{LogFormatter.FormatTypeName(TargetItemBinding)}.{nameof(TargetItemBinding.TryGetValue)}\" method.");
targetItemValue = default;
return(false);
}
}
private void UnsubscribeFromTargetItemEvents()
{
if (TargetItemBinding.TryGetItem(out var targetItem))
{
if (IsFromTargetToSourceBindingMode())
{
try
{
TargetItemBinding.UnsubscribeFromEvents(targetItem);
}
catch (Exception ex)
{
Log($"An \"{LogFormatter.FormatException(ex)}\" exception occurred while executing " +
$"\"{LogFormatter.FormatTypeName(TargetItemBinding)}.{nameof(TargetItemBinding.UnsubscribeFromEvents)}\" method.");
}
}
}
}
private void SetLogger()
{
SourceItemBinding.SetLogger(Logger);
TargetItemBinding.SetLogger(Logger);
ValueConverter.SetLogger(Logger);
}
