// Проверка на пересечение с другими элементами в Canvas
public static bool IsIntersectOnCanvas(UIElement element)
{
var currentPos = CustomVisualTreeHelper.PositionElementOnKernelCanvas(element);
var uIElement =
CustomVisualTreeHelper.KernelCanvas.Children.
Where(e =>
{
return((e is IEComponent) && (!e.Equals(element)));
}).
FirstOrDefault(e =>
{
var currentPos_e = CustomVisualTreeHelper.PositionElementOnKernelCanvas(e);
return(
// Находится ли левый верхний угол элемента (element) в области элемента (e)
(currentPos.X >= currentPos_e.X) &&
(currentPos.X <= (currentPos_e.X + e.DesiredSize.Width)) &&
(currentPos.Y >= currentPos_e.Y) &&
(currentPos.Y <= (currentPos_e.Y + e.DesiredSize.Height)) ||
// *
// Находится ли нижний правый угол элемента (element) в области элемента (e)
(currentPos.X + element.DesiredSize.Width >= currentPos_e.X) &&
(currentPos.X + element.DesiredSize.Width <= (currentPos_e.X + e.DesiredSize.Width)) &&
(currentPos.Y + element.DesiredSize.Height >= currentPos_e.Y) &&
(currentPos.Y + element.DesiredSize.Height <= (currentPos_e.Y + e.DesiredSize.Height)) ||
// *
(currentPos.X + element.DesiredSize.Width >= currentPos_e.X) &&
(currentPos.X <= (currentPos_e.X + e.DesiredSize.Width)) &&
(currentPos.Y + element.DesiredSize.Height >= currentPos_e.Y) &&
(currentPos.Y <= (currentPos_e.Y + e.DesiredSize.Height))
);
});
return(uIElement == null ? false : true);
}
private static Point GetCenterComponentOnCanvas(UIElement element)
{
var CurrentPositionComponentOnCanvas = CustomVisualTreeHelper.PositionElementOnKernelCanvas(element);
return(new Point(
(element as IEComponent).CenterComponent.X + CurrentPositionComponentOnCanvas.X,
(element as IEComponent).CenterComponent.Y + CurrentPositionComponentOnCanvas.Y
));
}
public static void UserControl_ManipulationCompleted(this IEComponent component, object sender, ManipulationCompletedRoutedEventArgs e)
{
var currentPositionComponentOnCanvas = CustomVisualTreeHelper.PositionElementOnKernelCanvas(sender as UIElement);
var left = Math.Round(currentPositionComponentOnCanvas.X); // Убрать Round?
var top = Math.Round(currentPositionComponentOnCanvas.Y);
// Выравнивание элемента по центру
var centerComponentOnCanvas = GetCenterComponentOnCanvas(sender as UIElement);
var step = 20;
var deltaX = Math.Round(centerComponentOnCanvas.X) % step;
if (deltaX < step / 2)
{
left -= deltaX;
}
else
{
left += (step - deltaX);
}
var deltaY = Math.Round(centerComponentOnCanvas.Y) % step;
if (deltaY < step / 2)
{
top -= deltaY;
}
else
{
top += (step - deltaY);
}
// *
// Проверка на выход из границ Canvas
left = left < 0 ? 0 : left;
top = top < 0 ? 0 : top;
// *
Canvas.SetLeft((UIElement)sender, left);
Canvas.SetTop((UIElement)sender, top);
if (IsIntersectOnCanvas(sender as UIElement))
{
Canvas.SetLeft((UIElement)sender, (sender as IEComponent).OldPositionComponentOnCanvas.X);
Canvas.SetTop((UIElement)sender, (sender as IEComponent).OldPositionComponentOnCanvas.Y);
}
(sender as IEComponent).ChildrenPositionUpdate();
}
public static void UserControl_ManipulationStarted(this IEComponent component, object sender, ManipulationStartedRoutedEventArgs e)
{
(sender as IEComponent).OldPositionComponentOnCanvas = CustomVisualTreeHelper.PositionElementOnKernelCanvas(sender as UIElement);
}
