sch_test/mxclient/js/util/mxClipboard.js

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2024-02-25 16:34:35 +00:00
/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
var mxClipboard =
{
/**
* Class: mxClipboard
*
* Singleton that implements a clipboard for graph cells.
*
* Example:
*
* (code)
* mxClipboard.copy(graph);
* mxClipboard.paste(graph2);
* (end)
*
* This copies the selection cells from the graph to the clipboard and
* pastes them into graph2.
*
* For fine-grained control of the clipboard data the <mxGraph.canExportCell>
* and <mxGraph.canImportCell> functions can be overridden.
*
* To restore previous parents for pasted cells, the implementation for
* <copy> and <paste> can be changed as follows.
*
* (code)
* mxClipboard.copy = function(graph, cells)
* {
* cells = cells || graph.getSelectionCells();
* var result = graph.getExportableCells(cells);
*
* mxClipboard.parents = new Object();
*
* for (var i = 0; i < result.length; i++)
* {
* mxClipboard.parents[i] = graph.model.getParent(cells[i]);
* }
*
* mxClipboard.insertCount = 1;
* mxClipboard.setCells(graph.cloneCells(result));
*
* return result;
* };
*
* mxClipboard.paste = function(graph)
* {
* if (!mxClipboard.isEmpty())
* {
* var cells = graph.getImportableCells(mxClipboard.getCells());
* var delta = mxClipboard.insertCount * mxClipboard.STEPSIZE;
* var parent = graph.getDefaultParent();
*
* graph.model.beginUpdate();
* try
* {
* for (var i = 0; i < cells.length; i++)
* {
* var tmp = (mxClipboard.parents != null && graph.model.contains(mxClipboard.parents[i])) ?
* mxClipboard.parents[i] : parent;
* cells[i] = graph.importCells([cells[i]], delta, delta, tmp)[0];
* }
* }
* finally
* {
* graph.model.endUpdate();
* }
*
* // Increments the counter and selects the inserted cells
* mxClipboard.insertCount++;
* graph.setSelectionCells(cells);
* }
* };
* (end)
*
* Variable: STEPSIZE
*
* Defines the step size to offset the cells after each paste operation.
* Default is 10.
*/
STEPSIZE: 10,
/**
* Variable: insertCount
*
* Counts the number of times the clipboard data has been inserted.
*/
insertCount: 1,
/**
* Variable: cells
*
* Holds the array of <mxCells> currently in the clipboard.
*/
cells: null,
/**
* Function: setCells
*
* Sets the cells in the clipboard. Fires a <mxEvent.CHANGE> event.
*/
setCells: function(cells)
{
mxClipboard.cells = cells;
},
/**
* Function: getCells
*
* Returns the cells in the clipboard.
*/
getCells: function()
{
return mxClipboard.cells;
},
/**
* Function: isEmpty
*
* Returns true if the clipboard currently has not data stored.
*/
isEmpty: function()
{
return mxClipboard.getCells() == null;
},
/**
* Function: cut
*
* Cuts the given array of <mxCells> from the specified graph.
* If cells is null then the selection cells of the graph will
* be used. Returns the cells that have been cut from the graph.
*
* Parameters:
*
* graph - <mxGraph> that contains the cells to be cut.
* cells - Optional array of <mxCells> to be cut.
*/
cut: function(graph, cells)
{
cells = mxClipboard.copy(graph, cells);
mxClipboard.insertCount = 0;
mxClipboard.removeCells(graph, cells);
return cells;
},
/**
* Function: removeCells
*
* Hook to remove the given cells from the given graph after
* a cut operation.
*
* Parameters:
*
* graph - <mxGraph> that contains the cells to be cut.
* cells - Array of <mxCells> to be cut.
*/
removeCells: function(graph, cells)
{
graph.removeCells(cells);
},
/**
* Function: copy
*
* Copies the given array of <mxCells> from the specified
* graph to <cells>. Returns the original array of cells that has
* been cloned. Descendants of cells in the array are ignored.
*
* Parameters:
*
* graph - <mxGraph> that contains the cells to be copied.
* cells - Optional array of <mxCells> to be copied.
*/
copy: function(graph, cells)
{
cells = cells || graph.getSelectionCells();
var result = graph.getExportableCells(graph.model.getTopmostCells(cells));
mxClipboard.insertCount = 1;
mxClipboard.setCells(graph.cloneCells(result));
return result;
},
/**
* Function: paste
*
* Pastes the <cells> into the specified graph restoring
* the relation to <parents>, if possible. If the parents
* are no longer in the graph or invisible then the
* cells are added to the graph's default or into the
* swimlane under the cell's new location if one exists.
* The cells are added to the graph using <mxGraph.importCells>
* and returned.
*
* Parameters:
*
* graph - <mxGraph> to paste the <cells> into.
*/
paste: function(graph)
{
var cells = null;
if (!mxClipboard.isEmpty())
{
cells = graph.getImportableCells(mxClipboard.getCells());
var delta = mxClipboard.insertCount * mxClipboard.STEPSIZE;
var parent = graph.getDefaultParent();
cells = graph.importCells(cells, delta, delta, parent);
// Increments the counter and selects the inserted cells
mxClipboard.insertCount++;
graph.setSelectionCells(cells);
}
return cells;
}
};