protected override void OnDragStarted(double horizontalOffset, double verticalOffset)
{
TargetLayer.GuidelineFilter.Push(GetSizeGuidableLines);
beginSize = (Vector)TargetElement.RenderSize;
if (TargetLayer.Parent is IStoryboard)
{
beginPosition = new Vector(
Canvas.GetLeft(TargetElement),
Canvas.GetTop(TargetElement));
}
else
{
var position = TargetElement.TranslatePoint(new Point(0, 0), (UIElement)TargetElement.Parent);
beginThickness = TargetLayer.GetParentLayoutInfo().Margin;
beginTargetThickness = TargetElement.Margin;
beginThickness.Left *= -1;
beginThickness.Top *= -1;
beginBound = new Rect(position, (Size)beginSize);
}
positionLimit = new Vector(
beginPosition.X + beginSize.X - TargetElement.GetDesignMinWidth(),
beginPosition.Y + beginSize.Y - TargetElement.GetDesignMinHeight());
base.OnDragStarted(horizontalOffset, verticalOffset);
}
private double SizingWidth(double deltaX)
{
double width = Math.Max(
TargetElement.GetDesignMinWidth(),
beginSize.X + deltaX);
TargetLayer.SetWidth(width);
return(width);
}
private void OnPanelDragDelta(double deltaX, double deltaY)
{
bool hasSizingLeft =
ResizeDirection == ResizeGripDirection.Left ||
ResizeDirection == ResizeGripDirection.BottomLeft ||
ResizeDirection == ResizeGripDirection.TopLeft;
bool hasSizingRight =
ResizeDirection == ResizeGripDirection.Right ||
ResizeDirection == ResizeGripDirection.BottomRight ||
ResizeDirection == ResizeGripDirection.TopRight;
bool hasSizingTop =
ResizeDirection == ResizeGripDirection.Top ||
ResizeDirection == ResizeGripDirection.TopLeft ||
ResizeDirection == ResizeGripDirection.TopRight;
bool hasSizingBottom =
ResizeDirection == ResizeGripDirection.Bottom ||
ResizeDirection == ResizeGripDirection.BottomLeft ||
ResizeDirection == ResizeGripDirection.BottomRight;
Thickness margin = beginTargetThickness;
var parentLayout = TargetLayer.GetParentLayoutInfo();
if (hasSizingTop)
{
switch (TargetLayer.GripLayer.ClipData.VerticalAlignment)
{
case VerticalAlignment.Center:
SizingHeight(-deltaY * 2);
break;
case VerticalAlignment.Stretch:
margin.Bottom = beginThickness.Bottom;
margin.Top = Math.Min(
beginThickness.Top + deltaY,
parentLayout.Bound.Height - beginThickness.Bottom - TargetElement.GetDesignMinHeight());
break;
case VerticalAlignment.Top:
{
double sizedHeight = SizingHeight(-deltaY);
margin.Top = beginBound.Bottom - sizedHeight;
}
break;
case VerticalAlignment.Bottom:
{
double sizedHeight = SizingHeight(-deltaY);
margin.Top = Math.Min(parentLayout.Bound.Height - sizedHeight - margin.Bottom, 0);
}
break;
}
}
if (hasSizingBottom)
{
switch (TargetLayer.GripLayer.ClipData.VerticalAlignment)
{
case VerticalAlignment.Center:
SizingHeight(deltaY * 2);
break;
case VerticalAlignment.Stretch:
margin.Bottom = Math.Min(
beginThickness.Bottom - deltaY,
parentLayout.Bound.Height - beginThickness.Top - TargetElement.GetDesignMinHeight());
break;
case VerticalAlignment.Top:
case VerticalAlignment.Bottom:
{
SizingHeight(deltaY);
margin.Bottom = Math.Min(
beginThickness.Bottom - deltaY,
parentLayout.Bound.Height - beginThickness.Top - TargetElement.GetDesignMinHeight());
if (TargetLayer.GripLayer.ClipData.VerticalAlignment == VerticalAlignment.Top)
{
margin.Bottom = Math.Min(margin.Bottom, 0);
}
// 부모가 스택인경우 처리
if (this.TargetLayer.Parent.Model is PStackLayout stack &&
stack.Orientation == Core.POrientation.Vertical)
{
margin.Bottom = beginThickness.Bottom;
}
}
break;
}
}
if (hasSizingLeft)
{
switch (TargetLayer.GripLayer.ClipData.HorizontalAlignment)
{
case HorizontalAlignment.Center:
SizingWidth(-deltaX * 2);
break;
case HorizontalAlignment.Stretch:
margin.Right = beginThickness.Right;
margin.Left = Math.Min(
beginThickness.Left + deltaX,
parentLayout.Bound.Width - beginThickness.Right - TargetElement.GetDesignMinWidth());
break;
case HorizontalAlignment.Left:
{
double sizedWidth = SizingWidth(-deltaX);
margin.Left = beginBound.Right - sizedWidth;
}
break;
case HorizontalAlignment.Right:
{
double sizedWidth = SizingWidth(-deltaX);
margin.Left = Math.Min(parentLayout.Bound.Width - sizedWidth - margin.Right, 0);
}
break;
}
}
if (hasSizingRight)
{
switch (TargetLayer.GripLayer.ClipData.HorizontalAlignment)
{
case HorizontalAlignment.Center:
SizingWidth(deltaX * 2);
break;
case HorizontalAlignment.Stretch:
margin.Right = Math.Min(
beginThickness.Right - deltaX,
parentLayout.Bound.Width - beginThickness.Left - TargetElement.GetDesignMinWidth());
break;
case HorizontalAlignment.Left:
case HorizontalAlignment.Right:
{
double sizedWidth = SizingWidth(deltaX);
margin.Right = Math.Min(
beginThickness.Right - deltaX,
parentLayout.Bound.Width - beginThickness.Left - TargetElement.GetDesignMinWidth());
if (TargetLayer.GripLayer.ClipData.HorizontalAlignment == HorizontalAlignment.Left)
{
margin.Right = Math.Min(margin.Right, 0);
}
// 부모가 스택인경우 처리
if (this.TargetLayer.Parent.Model is PStackLayout stack &&
stack.Orientation == Core.POrientation.Horizontal)
{
margin.Right = beginThickness.Right;
}
}
break;
}
}
TargetLayer.SetMargin(margin);
}