/// <inheritdoc />
public async Task ExecuteUserActionAsync()
{
var openPicker = new FileOpenPicker();
openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
openPicker.FileTypeFilter.Add(".json");
openPicker.ViewMode = PickerViewMode.List;
StorageFile file = await openPicker.PickSingleFileAsync();
if (file != null)
{
string jsonString = await FileIO.ReadTextAsync(file);
List <PaintBase> newShapeList = DeserializeJsonSave(jsonString);
// Clear undo, redo and master list
UndoStack.Clear();
RedoStack.Clear();
ShapeList.Clear();
// Add deserialized master list to main page
ShapeList.AddRange(newShapeList);
// Send draw and update list commands to main page
_page.Draw();
_page.UpdateList();
}
}
public void RemoveAll()
{
if (ShapeList.Count != 0)
{
Selection.Clear();
ShapeList.Clear();
}
}
public void Delete()
{
foreach (var item in Selection)
{
ShapeList.Remove(item);
}
ShapeList.Clear();
Selection.Clear();
}
/// <inheritdoc />
public Task ExecuteUserActionAsync()
{
if (UndoStack.Count > 0)
{
List <PaintBase> newState = UndoStack.Pop();
RedoStack.Push(ShapeList.DeepCopy());
ShapeList.Clear();
ShapeList.AddRange(newState);
_page.Draw();
_page.UpdateList();
}
return(Task.CompletedTask);
}
/// <inheritdoc />
public Task ExecuteUserActionAsync()
{
if (RedoStack.Count > 0)
{
// Pop prior state from stack
List <PaintBase> newState = RedoStack.Pop();
// Push current state onto the undo stack
UndoStack.Push(ShapeList.DeepCopy());
// Add prior state as current state
ShapeList.Clear();
ShapeList.AddRange(newState);
_page.Draw();
_page.UpdateList();
}
return(Task.CompletedTask);
}
private void btClear_Click(object sender, EventArgs e)
{
shapes.Clear();
Invalidate();
}
public void Clear()
{
ShapeList.Clear();
OpenedImage?.Dispose();
OpenedImage = null;
}
internal void ClearAll()
{
ShapeList.Clear();
Selection.Clear();
}
