private bool CanShrinkWidth(DesignerItem item, double amount)
{
if (item.Width - Math.Abs(amount) <= item.MinWidth)
{
return(false);
}
else
{
return(true);
}
}
private bool CanShrinkHeight(DesignerItem item, double amount)
{
if (item.Height - Math.Abs(amount) <= item.MinHeight)
{
return(false);
}
else
{
return(true);
}
}
private bool CanGrowDown(DesignerItem item, double amount)
{
if ((item.Height + Math.Abs(amount) >= item.MaxHeight) ||
(item.Y + item.Height + Math.Abs(amount) > item.ParentDesigner.Height))
{
return(false);
}
else
{
return(true);
}
}
private bool CanGrowUp(DesignerItem item, double amount)
{
if ((item.Height + Math.Abs(amount) >= item.MaxHeight) ||
(item.Y - Math.Abs(amount) < 0))
{
return(false);
}
else
{
return(true);
}
}
private bool CanGrowRight(DesignerItem item, double amount)
{
if ((item.Width + Math.Abs(amount) >= item.MaxWidth) ||
(item.X + item.Width + Math.Abs(amount) > item.ParentDesigner.Width))
{
return(false);
}
else
{
return(true);
}
}
private bool CanGrowLeft(DesignerItem item, double amount)
{
if ((item.Width + Math.Abs(amount) >= item.MaxWidth) ||
(item.X - Math.Abs(amount) < 0))
{
return(false);
}
else
{
return(true);
}
}
private void AdjustDown(DesignerItem item, double amount)
{
double delta = Math.Abs(amount);
if (amount < 0 && CanShrinkHeight(item, delta))
{
item.Height -= delta;
}
if (amount > 0 && CanGrowDown(item, delta))
{
item.Height += delta;
}
}
private void AdjustRight(DesignerItem item, double amount)
{
double delta = Math.Abs(amount);
if (amount < 0 && CanShrinkWidth(item, delta))
{
item.Width -= delta;
}
if (amount > 0 && CanGrowRight(item, delta))
{
item.Width += delta;
}
}
void DragThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
// Set up the data sources we'll need to work with
DesignerItem sourceItem = this.DataContext as DesignerItem;
//DesignerVM vm = sourceItem.ParentForm;
// Make sure something exists and is selected
if (sourceItem != null && sourceItem.IsSelected)
{
// Set up the selected items
//var selectedItems = vm.ActiveTab.SelectedItems;
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
/*
* // if more than one item is selected, treat them as a group -
* // when one stops moving, they all do
* double TopmostItemTop = vm.Height;
* double LeftmostItemLeft = 0;
* double RightmostItemLeft = 0;
* double BottomMostItemTop = 0;
*
* if (vm.SelectedItems.Count > 1)
* {
* foreach (DesignerItemBaseVM item in selectedItems.OfType<DesignerItemBaseVM>())
* {
*
* if (item.Top < TopmostItemTop) TopmostItemTop = item.Top;
* if (item.Left < LeftmostItemLeft) LeftmostItemLeft = item.Left;
* if (item.Top > BottomMostItemTop) BottomMostItemTop = item.Top;
* if (item.Left < RightmostItemLeft) RightmostItemLeft = item.Left;
*
* }
* System.Console.WriteLine("Extreme edges: Top({0}), Left({1}), Right({2}), Bottom({3})", TopmostItemTop, LeftmostItemLeft, RightmostItemLeft, BottomMostItemTop);
* } */
/*
* foreach (DesignerItem item in selectedItems.OfType<DesignerItem>())
* {
* double maxItemLeft = vm.Width - item.Width;
* double maxItemTop = vm.Height - item.Height;
*
* minLeft = double.IsNaN(item.Left) ? 0 : Math.Min(item.Left, minLeft);
* minTop = double.IsNaN(item.Top) ? 0 : Math.Min(item.Top, minTop);
*
*
* double deltaHorizontal = Math.Max(-minLeft, e.HorizontalChange);
* double deltaVertical = Math.Max(-minTop, e.VerticalChange);
*
* double desiredLeft = item.Left + deltaHorizontal;
* double desiredTop = item.Top + deltaVertical;
*
*
* if (desiredLeft > maxItemLeft) item.Left = maxItemLeft;
* else item.Left += deltaHorizontal;
*
* if (desiredTop > maxItemTop) item.Top = maxItemTop;
* else item.Top += deltaVertical;
* } */
e.Handled = true;
}
}