protected MindMapViewModel(IPersistence persistence = null)
{
this.Log().Debug("Creating {0}", this.GetType().Name);
ViewModel = this;
_persistence = persistence ?? Locator.Current.GetService <IPersistence>();
LeftTreeItems = AllTreeItems.CreateDerivedCollection(x => x, x => x.Index > (AllTreeItems.Count / 2) - 1);
RightTreeItems = AllTreeItems.CreateDerivedCollection(x => x, x => x.Index <= (AllTreeItems.Count / 2) - 1);
var settingSelectedItem = false;
this.WhenAnyValue(x => x.LeftSelection).Subscribe(x =>
{
if (settingSelectedItem)
{
return;
}
settingSelectedItem = true;
if (RightSelection != null)
{
RightSelection.IsSelected = false;
}
SelectedItem = x;
settingSelectedItem = false;
});
this.WhenAnyValue(x => x.RightSelection).Subscribe(x =>
{
if (settingSelectedItem)
{
return;
}
settingSelectedItem = true;
if (LeftSelection != null)
{
LeftSelection.IsSelected = false;
}
SelectedItem = x;
settingSelectedItem = false;
});
var falseWhenNothingSelected =
this.WhenAnyValue(x => x.SelectedItem).Where(x => x == null).Select(x => false);
this.WhenAnyValue(x => x.SelectedItem.CanMoveUp).Merge(falseWhenNothingSelected)
.Log(this, "canMoveUp ")
.ToProperty(this, x => x.CanMoveUp, out _canMoveUp);
this.WhenAnyValue(x => x.SelectedItem.CanMoveDown).Merge(falseWhenNothingSelected)
.Log(this, "canMoveDown ")
.ToProperty(this, x => x.CanMoveDown, out _canMoveDown);
this.WhenAnyValue(x => x.SelectedItem.CanPromote).Merge(falseWhenNothingSelected)
.Log(this, "canPromote ")
.ToProperty(this, x => x.CanPromote, out _canPromote);
this.WhenAnyValue(x => x.SelectedItem.CanDemote).Merge(falseWhenNothingSelected)
.Log(this, "canDemote ")
.ToProperty(this, x => x.CanDemote, out _canDemote);
this.WhenAnyValue(x => x.SelectedItem.CanViewPage).Merge(falseWhenNothingSelected)
.Log(this, "canViewPage")
.ToProperty(this, x => x.CanViewPage, out _canViewPage);
}
public void Push(Item root)
{
AllExternalDataItems = initialDataItems.ToList();
MatchedExternalDataItems.Clear();
UnmatchedExternalDataItems = initialDataItems.ToList();
AllTreeItems.AddRange(root.Subtree().OfType <TItem>());
MatchedTreeItems.Clear();
UnmatchedTreeItems = AllTreeItems.ToList();
match = new Dictionary <TItem, TData>();
matrix = new double[AllTreeItems.Count, AllExternalDataItems.Count];
for (int i = 0; i < AllTreeItems.Count; i++)
{
for (int j = 0; j < AllExternalDataItems.Count; j++)
{
matrix[i, j] = distance(AllTreeItems[i], AllExternalDataItems[j]);
}
}
for (int i = 0; i < AllTreeItems.Count; i++)
{
var storedData = AllTreeItems[i].Get <TData>();
if (storedData != null)
{
var foundData = UnmatchedExternalDataItems.Where(z => Equals(z, storedData)).FirstOrDefault();
if (foundData != null)
{
MakeMatch(i, AllExternalDataItems.IndexOf(foundData));
}
}
}
while (true)
{
int bestX = -1;
int bestY = -1;
double best = 0;
for (int i = 0; i < AllTreeItems.Count; i++)
{
for (int j = 0; j < AllExternalDataItems.Count; j++)
{
if (bestX < 0 || matrix[i, j] > best)
{
bestX = i;
bestY = j;
best = matrix[i, j];
}
}
}
if (best > 0)
{
MakeMatch(bestX, bestY);
}
else
{
break;
}
}
DataBinding <TItem> .Pull(root, z => match.ContainsKey(z)?match[z] : default(TData));
}
