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/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
/**
* Class: mxGraphSelectionModel
*
* Implements the selection model for a graph. Here is a listener that handles
* all removed selection cells.
*
* (code)
* graph.getSelectionModel().addListener(mxEvent.CHANGE, function(sender, evt)
* {
* var cells = evt.getProperty('added');
*
* for (var i = 0; i < cells.length; i++)
* {
* // Handle cells[i]...
* }
* });
* (end)
*
* Event: mxEvent.UNDO
*
* Fires after the selection was changed in <changeSelection>. The
* <code>edit</code> property contains the <mxUndoableEdit> which contains the
* <mxSelectionChange>.
*
* Event: mxEvent.CHANGE
*
* Fires after the selection changes by executing an <mxSelectionChange>. The
* <code>added</code> and <code>removed</code> properties contain arrays of
* cells that have been added to or removed from the selection, respectively.
* The names are inverted due to historic reasons. This cannot be changed.
*
* Constructor: mxGraphSelectionModel
*
* Constructs a new graph selection model for the given <mxGraph>.
*
* Parameters:
*
* graph - Reference to the enclosing <mxGraph>.
*/
function mxGraphSelectionModel(graph)
{
this.graph = graph;
this.cells = [];
};
/**
* Extends mxEventSource.
*/
mxGraphSelectionModel.prototype = new mxEventSource();
mxGraphSelectionModel.prototype.constructor = mxGraphSelectionModel;
/**
* Variable: doneResource
*
* Specifies the resource key for the status message after a long operation.
* If the resource for this key does not exist then the value is used as
* the status message. Default is 'done'.
*/
mxGraphSelectionModel.prototype.doneResource = (mxClient.language != 'none') ? 'done' : '';
/**
* Variable: updatingSelectionResource
*
* Specifies the resource key for the status message while the selection is
* being updated. If the resource for this key does not exist then the
* value is used as the status message. Default is 'updatingSelection'.
*/
mxGraphSelectionModel.prototype.updatingSelectionResource = (mxClient.language != 'none') ? 'updatingSelection' : '';
/**
* Variable: graph
*
* Reference to the enclosing <mxGraph>.
*/
mxGraphSelectionModel.prototype.graph = null;
/**
* Variable: singleSelection
*
* Specifies if only one selected item at a time is allowed.
* Default is false.
*/
mxGraphSelectionModel.prototype.singleSelection = false;
/**
* Function: isSingleSelection
*
* Returns <singleSelection> as a boolean.
*/
mxGraphSelectionModel.prototype.isSingleSelection = function()
{
return this.singleSelection;
};
/**
* Function: setSingleSelection
*
* Sets the <singleSelection> flag.
*
* Parameters:
*
* singleSelection - Boolean that specifies the new value for
* <singleSelection>.
*/
mxGraphSelectionModel.prototype.setSingleSelection = function(singleSelection)
{
this.singleSelection = singleSelection;
};
/**
* Function: isSelected
*
* Returns true if the given <mxCell> is selected.
*/
mxGraphSelectionModel.prototype.isSelected = function(cell)
{
if (cell != null)
{
return mxUtils.indexOf(this.cells, cell) >= 0;
}
return false;
};
/**
* Function: isEmpty
*
* Returns true if no cells are currently selected.
*/
mxGraphSelectionModel.prototype.isEmpty = function()
{
return this.cells.length == 0;
};
/**
* Function: clear
*
* Clears the selection and fires a <change> event if the selection was not
* empty.
*/
mxGraphSelectionModel.prototype.clear = function()
{
this.changeSelection(null, this.cells);
};
/**
* Function: setCell
*
* Selects the specified <mxCell> using <setCells>.
*
* Parameters:
*
* cell - <mxCell> to be selected.
*/
mxGraphSelectionModel.prototype.setCell = function(cell)
{
if (cell != null)
{
this.setCells([cell]);
}
};
/**
* Function: setCells
*
* Selects the given array of <mxCells> and fires a <change> event.
*
* Parameters:
*
* cells - Array of <mxCells> to be selected.
*/
mxGraphSelectionModel.prototype.setCells = function(cells)
{
if (cells != null)
{
if (this.singleSelection)
{
cells = [this.getFirstSelectableCell(cells)];
}
var tmp = [];
for (var i = 0; i < cells.length; i++)
{
if (this.graph.isCellSelectable(cells[i]))
{
tmp.push(cells[i]);
}
}
this.changeSelection(tmp, this.cells);
}
};
/**
* Function: getFirstSelectableCell
*
* Returns the first selectable cell in the given array of cells.
*/
mxGraphSelectionModel.prototype.getFirstSelectableCell = function(cells)
{
if (cells != null)
{
for (var i = 0; i < cells.length; i++)
{
if (this.graph.isCellSelectable(cells[i]))
{
return cells[i];
}
}
}
return null;
};
/**
* Function: addCell
*
* Adds the given <mxCell> to the selection and fires a <select> event.
*
* Parameters:
*
* cell - <mxCell> to add to the selection.
*/
mxGraphSelectionModel.prototype.addCell = function(cell)
{
if (cell != null)
{
this.addCells([cell]);
}
};
/**
* Function: addCells
*
* Adds the given array of <mxCells> to the selection and fires a <select>
* event.
*
* Parameters:
*
* cells - Array of <mxCells> to add to the selection.
*/
mxGraphSelectionModel.prototype.addCells = function(cells)
{
if (cells != null)
{
var remove = null;
if (this.singleSelection)
{
remove = this.cells;
cells = [this.getFirstSelectableCell(cells)];
}
var tmp = [];
for (var i = 0; i < cells.length; i++)
{
if (!this.isSelected(cells[i]) &&
this.graph.isCellSelectable(cells[i]))
{
tmp.push(cells[i]);
}
}
this.changeSelection(tmp, remove);
}
};
/**
* Function: removeCell
*
* Removes the specified <mxCell> from the selection and fires a <select>
* event for the remaining cells.
*
* Parameters:
*
* cell - <mxCell> to remove from the selection.
*/
mxGraphSelectionModel.prototype.removeCell = function(cell)
{
if (cell != null)
{
this.removeCells([cell]);
}
};
/**
* Function: removeCells
*/
mxGraphSelectionModel.prototype.removeCells = function(cells)
{
if (cells != null)
{
var tmp = [];
for (var i = 0; i < cells.length; i++)
{
if (this.isSelected(cells[i]))
{
tmp.push(cells[i]);
}
}
this.changeSelection(null, tmp);
}
};
/**
* Function: changeSelection
*
* Inner callback to add the specified <mxCell> to the selection. No event
* is fired in this implementation.
*
* Paramters:
*
* cell - <mxCell> to add to the selection.
*/
mxGraphSelectionModel.prototype.changeSelection = function(added, removed)
{
if ((added != null &&
added.length > 0 &&
added[0] != null) ||
(removed != null &&
removed.length > 0 &&
removed[0] != null))
{
var change = new mxSelectionChange(this, added, removed);
change.execute();
var edit = new mxUndoableEdit(this, false);
edit.add(change);
this.fireEvent(new mxEventObject(mxEvent.UNDO, 'edit', edit));
}
};
/**
* Function: cellAdded
*
* Inner callback to add the specified <mxCell> to the selection. No event
* is fired in this implementation.
*
* Paramters:
*
* cell - <mxCell> to add to the selection.
*/
mxGraphSelectionModel.prototype.cellAdded = function(cell)
{
if (cell != null &&
!this.isSelected(cell))
{
this.cells.push(cell);
}
};
/**
* Function: cellRemoved
*
* Inner callback to remove the specified <mxCell> from the selection. No
* event is fired in this implementation.
*
* Parameters:
*
* cell - <mxCell> to remove from the selection.
*/
mxGraphSelectionModel.prototype.cellRemoved = function(cell)
{
if (cell != null)
{
var index = mxUtils.indexOf(this.cells, cell);
if (index >= 0)
{
this.cells.splice(index, 1);
}
}
};
/**
* Class: mxSelectionChange
*
* Action to change the current root in a view.
*
* Constructor: mxCurrentRootChange
*
* Constructs a change of the current root in the given view.
*/
function mxSelectionChange(selectionModel, added, removed)
{
this.selectionModel = selectionModel;
this.added = (added != null) ? added.slice() : null;
this.removed = (removed != null) ? removed.slice() : null;
};
/**
* Function: execute
*
* Changes the current root of the view.
*/
mxSelectionChange.prototype.execute = function()
{
var t0 = mxLog.enter('mxSelectionChange.execute');
window.status = mxResources.get(
this.selectionModel.updatingSelectionResource) ||
this.selectionModel.updatingSelectionResource;
if (this.removed != null)
{
for (var i = 0; i < this.removed.length; i++)
{
this.selectionModel.cellRemoved(this.removed[i]);
}
}
if (this.added != null)
{
for (var i = 0; i < this.added.length; i++)
{
this.selectionModel.cellAdded(this.added[i]);
}
}
var tmp = this.added;
this.added = this.removed;
this.removed = tmp;
window.status = mxResources.get(this.selectionModel.doneResource) ||
this.selectionModel.doneResource;
mxLog.leave('mxSelectionChange.execute', t0);
this.selectionModel.fireEvent(new mxEventObject(mxEvent.CHANGE,
'added', this.added, 'removed', this.removed));
};
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