/// <inheritdoc />
public Task PointerPressedExecuteAsync()
{
// Add entry to UndoStack
UndoStack.Push(ShapeList.DeepCopy());
RedoStack.Clear();
// Set pointer starting point
_pointerStart = PointerEventArgs.GetCurrentPoint(Canvas).Position;
// Create new shape
PaintBase shape = new PaintShape(ShapeType);
shape.X = _pointerStart.X;
shape.Y = _pointerStart.Y;
shape.Width = 2;
shape.Height = 2;
ShapeList.Add(shape);
current = shape;
_page.Draw();
_page.UpdateList();
return(Task.CompletedTask);
}
/// <summary>
/// Deserialize paint group
/// </summary>
/// <param name="jObject">paintgroup JObject</param>
/// <param name="baseProps">basic shape properties</param>
/// <returns>Paintgroup</returns>
private PaintGroup GetPaintGroup(JObject jObject, PaintBaseProperties baseProps)
{
PaintGroup group = new PaintGroup
{
Height = baseProps.Height,
Width = baseProps.Width,
X = baseProps.X,
Y = baseProps.Y
};
if (jObject.GetValue("children") is JArray children)
{
// Deserialize children
foreach (JToken child in children)
{
if (child is JObject jChild &&
Enum.TryParse(jChild.GetValue("type").ToString(), out PaintType type))
{
PaintBaseProperties deserBase = GetBaseProperties(jChild);
if (deserBase != null)
{
if (type == PaintType.Shape)
{
PaintShape shape = GetPaintShape(jChild, deserBase);
if (shape != null)
{
group.Add(AddDecorators(jChild, shape));
}
}
else if (type == PaintType.Group)
{
// If child is a group, recursively deserialize to object
PaintGroup innerGroup = GetPaintGroup(jChild, deserBase);
if (innerGroup != null)
{
group.Add(AddDecorators(jChild, innerGroup));
}
}
}
}
}
}
return(group);
}
/// <summary>
/// Convert json string into a state with objects
/// </summary>
/// <param name="jsonSaveString">savefile as json string</param>
/// <returns>Canvas state</returns>
private List <PaintBase> DeserializeJsonSave(string jsonSaveString)
{
List <PaintBase> newShapeList = new List <PaintBase>();
// Savefile should contain json array at root
JArray jArray = JArray.Parse(jsonSaveString);
if (jArray != null)
{
// Iterate through items in array
foreach (JToken jToken in jArray)
{
if (jToken is JObject jObject)
{
if (Enum.TryParse(jObject.GetValue("type").ToString(), out PaintType type))
{
// Get base properties
PaintBaseProperties deserializedProperties = GetBaseProperties(jObject);
if (deserializedProperties != null)
{
if (type == PaintType.Shape)
{
PaintShape shape = GetPaintShape(jObject, deserializedProperties);
if (shape != null)
{
newShapeList.Add(AddDecorators(jObject, shape));
}
}
else if (type == PaintType.Group)
{
PaintGroup group = GetPaintGroup(jObject, deserializedProperties);
if (group != null)
{
newShapeList.Add(AddDecorators(jObject, group));
}
}
}
}
}
}
}
return(newShapeList);
}