| java.lang.Object
 com.jeta.forms.gui.form.CellAssignmentCache
| CellAssignmentCache | | public class CellAssignmentCache (Code) | | This class maintains an array of GridComponents for a given view. It is used
to quickly find a component at a given cell row/column position.
Additionally, it can find out any components that overlap a given row/column
position of those componenents have rowspan/columnspans greater than 1. We
need this class because the current FormLayout does not fully provide this
information, and the information it does provide is a copy. This makes it
terribly inefficient to use when repainting, so we need this cache mainly for
performance.
author:
Jeff Tassin |
| Constructor Summary | |
| public | CellAssignmentCache(GridView view)
Creates a CellAssignmentCache that is associated with the
specified view. |
| Method Summary | |
| void | addComponent(GridComponent gc)
Adds the specified component to this cache. | | public GridComponent | getGridComponent(int col, int row)
Returns the GridComponent object that is located at the give column and
row. | | public GridComponent | getOverlappingComponent(int col, int row)
Returns the component, if any, that overlaps the given cell.
Parameters:
col - the column for the specified cell
Parameters:
row - the row for the specified cell. | | void | sync()
Marks the cache as invalid. |
| CellAssignmentCache | | public CellAssignmentCache(GridView view)(Code) | | Creates a CellAssignmentCache that is associated with the
specified view.
Parameters:
view - the GridView that this cache maintains information for. |
| addComponent | | void addComponent(GridComponent gc)(Code) | | Adds the specified component to this cache.
Parameters:
gc - the component to add to the cache. |
| getGridComponent | | public GridComponent getGridComponent(int col, int row)(Code) | | Returns the GridComponent object that is located at the give column and
row.
the component that occupies the cell at the given row/column.Null is returned if the specified cell does not have aGridComponent. |
| getOverlappingComponent | | public GridComponent getOverlappingComponent(int col, int row)(Code) | | Returns the component, if any, that overlaps the given cell.
Parameters:
col - the column for the specified cell
Parameters:
row - the row for the specified cell. the component that overlaps the cell at the given column and row.If no component overlaps, then null is returned. |
| sync | | void sync()(Code) | | Marks the cache as invalid.
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