/// <summary>Create resize process from column list, active (hovered) column and side (left or right) of resize.</summary>
public static ColumnResizeProcess FromActiveColumn(IList<CustomListBoxColumn> columns, int activeIndex, ColumnResizeSide side, Point mouseDownLocation)
{
Assert.IsNotNull(columns);
var activeColumn = columns[activeIndex];
int autoSizeId = int.MaxValue;
for(int i = 0; i < columns.Count; ++i)
{
if(columns[i].IsVisible && columns[i].SizeMode == ColumnSizeMode.Fill)
{
autoSizeId = i;
break;
}
}
switch(side)
{
case ColumnResizeSide.Left:
var prevColumn = columns.FindPrevious(activeIndex, column => column.IsVisible);
if(prevColumn != null && activeIndex <= autoSizeId)
{
if(prevColumn.SizeMode == ColumnSizeMode.Sizeable)
{
return new ColumnResizeProcess(prevColumn, 1, mouseDownLocation);
}
}
if(activeColumn.SizeMode != ColumnSizeMode.Sizeable)
{
return null;
}
return new ColumnResizeProcess(activeColumn, -1, mouseDownLocation);
case ColumnResizeSide.Right:
if(activeColumn.SizeMode != ColumnSizeMode.Sizeable || activeIndex > autoSizeId)
{
var nextColumn = columns.FindNext(activeIndex, column => column.IsVisible);
if(nextColumn != null)
{
return new ColumnResizeProcess(nextColumn, -1, mouseDownLocation);
}
else
{
return null;
}
}
else
{
return new ColumnResizeProcess(activeColumn, 1, mouseDownLocation);
}
default:
throw new ArgumentException("Invalid column resize side.", "side");
}
}
/// <summary>Create resize process from column list, active (hovered) column and side (left or right) of resize.</summary>
public static ColumnResizeProcess FromActiveColumn(IList <CustomListBoxColumn> columns, int activeIndex, ColumnResizeSide side, Point mouseDownLocation)
{
Assert.IsNotNull(columns);
var activeColumn = columns[activeIndex];
int autoSizeId = int.MaxValue;
for (int i = 0; i < columns.Count; ++i)
{
if (columns[i].IsVisible && columns[i].SizeMode == ColumnSizeMode.Fill)
{
autoSizeId = i;
break;
}
}
switch (side)
{
case ColumnResizeSide.Left:
var prevColumn = columns.FindPrevious(activeIndex, column => column.IsVisible);
if (prevColumn != null && activeIndex <= autoSizeId)
{
if (prevColumn.SizeMode == ColumnSizeMode.Sizeable)
{
return(new ColumnResizeProcess(prevColumn, 1, mouseDownLocation));
}
}
if (activeColumn.SizeMode != ColumnSizeMode.Sizeable)
{
return(null);
}
return(new ColumnResizeProcess(activeColumn, -1, mouseDownLocation));
case ColumnResizeSide.Right:
if (activeColumn.SizeMode != ColumnSizeMode.Sizeable || activeIndex > autoSizeId)
{
var nextColumn = columns.FindNext(activeIndex, column => column.IsVisible);
if (nextColumn != null)
{
return(new ColumnResizeProcess(nextColumn, -1, mouseDownLocation));
}
else
{
return(null);
}
}
else
{
return(new ColumnResizeProcess(activeColumn, 1, mouseDownLocation));
}
default:
throw new ArgumentException("Invalid column resize side.", "side");
}
}
private void HandleHeaderResizerMouseDown(int itemIndex, ColumnResizeSide resizeSide, MouseEventArgs e)
{
_columnResizeProcess = ColumnResizeProcess.FromActiveColumn(Columns, itemIndex, resizeSide, e.Location);
}