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/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
/**
* Class: mxDefaultToolbar
*
* Toolbar for the editor. This modifies the state of the graph
* or inserts new cells upon mouse clicks.
*
* Example:
*
* Create a toolbar with a button to copy the selection into the clipboard,
* and a combo box with one action to paste the selection from the clipboard
* into the graph.
*
* (code)
* var toolbar = new mxDefaultToolbar(container, editor);
* toolbar.addItem('Copy', null, 'copy');
*
* var combo = toolbar.addActionCombo('More actions...');
* toolbar.addActionOption(combo, 'Paste', 'paste');
* (end)
*
* Codec:
*
* This class uses the <mxDefaultToolbarCodec> to read configuration
* data into an existing instance. See <mxDefaultToolbarCodec> for a
* description of the configuration format.
*
* Constructor: mxDefaultToolbar
*
* Constructs a new toolbar for the given container and editor. The
* container and editor may be null if a prototypical instance for a
* <mxDefaultKeyHandlerCodec> is created.
*
* Parameters:
*
* container - DOM node that contains the toolbar.
* editor - Reference to the enclosing <mxEditor>.
*/
function mxDefaultToolbar(container, editor)
{
this.editor = editor;
if (container != null && editor != null)
{
this.init(container);
}
};
/**
* Variable: editor
*
* Reference to the enclosing <mxEditor>.
*/
mxDefaultToolbar.prototype.editor = null;
/**
* Variable: toolbar
*
* Holds the internal <mxToolbar>.
*/
mxDefaultToolbar.prototype.toolbar = null;
/**
* Variable: resetHandler
*
* Reference to the function used to reset the <toolbar>.
*/
mxDefaultToolbar.prototype.resetHandler = null;
/**
* Variable: spacing
*
* Defines the spacing between existing and new vertices in
* gridSize units when a new vertex is dropped on an existing
* cell. Default is 4 (40 pixels).
*/
mxDefaultToolbar.prototype.spacing = 4;
/**
* Variable: connectOnDrop
*
* Specifies if elements should be connected if new cells are dropped onto
* connectable elements. Default is false.
*/
mxDefaultToolbar.prototype.connectOnDrop = false;
/**
* Variable: init
*
* Constructs the <toolbar> for the given container and installs a listener
* that updates the <mxEditor.insertFunction> on <editor> if an item is
* selected in the toolbar. This assumes that <editor> is not null.
*
* Parameters:
*
* container - DOM node that contains the toolbar.
*/
mxDefaultToolbar.prototype.init = function(container)
{
if (container != null)
{
this.toolbar = new mxToolbar(container);
// Installs the insert function in the editor if an item is
// selected in the toolbar
this.toolbar.addListener(mxEvent.SELECT, mxUtils.bind(this, function(sender, evt)
{
var funct = evt.getProperty('function');
if (funct != null)
{
this.editor.insertFunction = mxUtils.bind(this, function()
{
funct.apply(this, arguments);
this.toolbar.resetMode();
});
}
else
{
this.editor.insertFunction = null;
}
}));
// Resets the selected tool after a doubleclick or escape keystroke
this.resetHandler = mxUtils.bind(this, function()
{
if (this.toolbar != null)
{
this.toolbar.resetMode(true);
}
});
this.editor.graph.addListener(mxEvent.DOUBLE_CLICK, this.resetHandler);
this.editor.addListener(mxEvent.ESCAPE, this.resetHandler);
}
};
/**
* Function: addItem
*
* Adds a new item that executes the given action in <editor>. The title,
* icon and pressedIcon are used to display the toolbar item.
*
* Parameters:
*
* title - String that represents the title (tooltip) for the item.
* icon - URL of the icon to be used for displaying the item.
* action - Name of the action to execute when the item is clicked.
* pressed - Optional URL of the icon for the pressed state.
*/
mxDefaultToolbar.prototype.addItem = function(title, icon, action, pressed)
{
var clickHandler = mxUtils.bind(this, function()
{
if (action != null && action.length > 0)
{
this.editor.execute(action);
}
});
return this.toolbar.addItem(title, icon, clickHandler, pressed);
};
/**
* Function: addSeparator
*
* Adds a vertical separator using the optional icon.
*
* Parameters:
*
* icon - Optional URL of the icon that represents the vertical separator.
* Default is <mxClient.imageBasePath> + '/separator.gif'.
*/
mxDefaultToolbar.prototype.addSeparator = function(icon)
{
icon = icon || mxClient.imageBasePath + '/separator.gif';
this.toolbar.addSeparator(icon);
};
/**
* Function: addCombo
*
* Helper method to invoke <mxToolbar.addCombo> on <toolbar> and return the
* resulting DOM node.
*/
mxDefaultToolbar.prototype.addCombo = function()
{
return this.toolbar.addCombo();
};
/**
* Function: addActionCombo
*
* Helper method to invoke <mxToolbar.addActionCombo> on <toolbar> using
* the given title and return the resulting DOM node.
*
* Parameters:
*
* title - String that represents the title of the combo.
*/
mxDefaultToolbar.prototype.addActionCombo = function(title)
{
return this.toolbar.addActionCombo(title);
};
/**
* Function: addActionOption
*
* Binds the given action to a option with the specified label in the
* given combo. Combo is an object returned from an earlier call to
* <addCombo> or <addActionCombo>.
*
* Parameters:
*
* combo - DOM node that represents the combo box.
* title - String that represents the title of the combo.
* action - Name of the action to execute in <editor>.
*/
mxDefaultToolbar.prototype.addActionOption = function(combo, title, action)
{
var clickHandler = mxUtils.bind(this, function()
{
this.editor.execute(action);
});
this.addOption(combo, title, clickHandler);
};
/**
* Function: addOption
*
* Helper method to invoke <mxToolbar.addOption> on <toolbar> and return
* the resulting DOM node that represents the option.
*
* Parameters:
*
* combo - DOM node that represents the combo box.
* title - String that represents the title of the combo.
* value - Object that represents the value of the option.
*/
mxDefaultToolbar.prototype.addOption = function(combo, title, value)
{
return this.toolbar.addOption(combo, title, value);
};
/**
* Function: addMode
*
* Creates an item for selecting the given mode in the <editor>'s graph.
* Supported modenames are select, connect and pan.
*
* Parameters:
*
* title - String that represents the title of the item.
* icon - URL of the icon that represents the item.
* mode - String that represents the mode name to be used in
* <mxEditor.setMode>.
* pressed - Optional URL of the icon that represents the pressed state.
* funct - Optional JavaScript function that takes the <mxEditor> as the
* first and only argument that is executed after the mode has been
* selected.
*/
mxDefaultToolbar.prototype.addMode = function(title, icon, mode, pressed, funct)
{
var clickHandler = mxUtils.bind(this, function()
{
this.editor.setMode(mode);
if (funct != null)
{
funct(this.editor);
}
});
return this.toolbar.addSwitchMode(title, icon, clickHandler, pressed);
};
/**
* Function: addPrototype
*
* Creates an item for inserting a clone of the specified prototype cell into
* the <editor>'s graph. The ptype may either be a cell or a function that
* returns a cell.
*
* Parameters:
*
* title - String that represents the title of the item.
* icon - URL of the icon that represents the item.
* ptype - Function or object that represents the prototype cell. If ptype
* is a function then it is invoked with no arguments to create new
* instances.
* pressed - Optional URL of the icon that represents the pressed state.
* insert - Optional JavaScript function that handles an insert of the new
* cell. This function takes the <mxEditor>, new cell to be inserted, mouse
* event and optional <mxCell> under the mouse pointer as arguments.
* toggle - Optional boolean that specifies if the item can be toggled.
* Default is true.
*/
mxDefaultToolbar.prototype.addPrototype = function(title, icon, ptype, pressed, insert, toggle)
{
// Creates a wrapper function that is in charge of constructing
// the new cell instance to be inserted into the graph
var factory = mxUtils.bind(this, function()
{
if (typeof(ptype) == 'function')
{
return ptype();
}
else if (ptype != null)
{
return this.editor.graph.cloneCells([ptype])[0];
}
return null;
});
// Defines the function for a click event on the graph
// after this item has been selected in the toolbar
var clickHandler = mxUtils.bind(this, function(evt, cell)
{
if (typeof(insert) == 'function')
{
insert(this.editor, factory(), evt, cell);
}
else
{
this.drop(factory(), evt, cell);
}
this.toolbar.resetMode();
mxEvent.consume(evt);
});
var img = this.toolbar.addMode(title, icon, clickHandler, pressed, null, toggle);
// Creates a wrapper function that calls the click handler without
// the graph argument
var dropHandler = function(graph, evt, cell)
{
clickHandler(evt, cell);
};
this.installDropHandler(img, dropHandler);
return img;
};
/**
* Function: drop
*
* Handles a drop from a toolbar item to the graph. The given vertex
* represents the new cell to be inserted. This invokes <insert> or
* <connect> depending on the given target cell.
*
* Parameters:
*
* vertex - <mxCell> to be inserted.
* evt - Mouse event that represents the drop.
* target - Optional <mxCell> that represents the drop target.
*/
mxDefaultToolbar.prototype.drop = function(vertex, evt, target)
{
var graph = this.editor.graph;
var model = graph.getModel();
if (target == null ||
model.isEdge(target) ||
!this.connectOnDrop ||
!graph.isCellConnectable(target))
{
while (target != null &&
!graph.isValidDropTarget(target, [vertex], evt))
{
target = model.getParent(target);
}
this.insert(vertex, evt, target);
}
else
{
this.connect(vertex, evt, target);
}
};
/**
* Function: insert
*
* Handles a drop by inserting the given vertex into the given parent cell
* or the default parent if no parent is specified.
*
* Parameters:
*
* vertex - <mxCell> to be inserted.
* evt - Mouse event that represents the drop.
* parent - Optional <mxCell> that represents the parent.
*/
mxDefaultToolbar.prototype.insert = function(vertex, evt, target)
{
var graph = this.editor.graph;
if (graph.canImportCell(vertex))
{
var x = mxEvent.getClientX(evt);
var y = mxEvent.getClientY(evt);
var pt = mxUtils.convertPoint(graph.container, x, y);
// Splits the target edge or inserts into target group
if (graph.isSplitEnabled() &&
graph.isSplitTarget(target, [vertex], evt))
{
return graph.splitEdge(target, [vertex], null, pt.x, pt.y);
}
else
{
return this.editor.addVertex(target, vertex, pt.x, pt.y);
}
}
return null;
};
/**
* Function: connect
*
* Handles a drop by connecting the given vertex to the given source cell.
*
* vertex - <mxCell> to be inserted.
* evt - Mouse event that represents the drop.
* source - Optional <mxCell> that represents the source terminal.
*/
mxDefaultToolbar.prototype.connect = function(vertex, evt, source)
{
var graph = this.editor.graph;
var model = graph.getModel();
if (source != null &&
graph.isCellConnectable(vertex) &&
graph.isEdgeValid(null, source, vertex))
{
var edge = null;
model.beginUpdate();
try
{
var geo = model.getGeometry(source);
var g = model.getGeometry(vertex).clone();
// Moves the vertex away from the drop target that will
// be used as the source for the new connection
g.x = geo.x + (geo.width - g.width) / 2;
g.y = geo.y + (geo.height - g.height) / 2;
var step = this.spacing * graph.gridSize;
var dist = model.getDirectedEdgeCount(source, true) * 20;
if (this.editor.horizontalFlow)
{
g.x += (g.width + geo.width) / 2 + step + dist;
}
else
{
g.y += (g.height + geo.height) / 2 + step + dist;
}
vertex.setGeometry(g);
// Fires two add-events with the code below - should be fixed
// to only fire one add event for both inserts
var parent = model.getParent(source);
graph.addCell(vertex, parent);
graph.constrainChild(vertex);
// Creates the edge using the editor instance and calls
// the second function that fires an add event
edge = this.editor.createEdge(source, vertex);
if (model.getGeometry(edge) == null)
{
var edgeGeometry = new mxGeometry();
edgeGeometry.relative = true;
model.setGeometry(edge, edgeGeometry);
}
graph.addEdge(edge, parent, source, vertex);
}
finally
{
model.endUpdate();
}
graph.setSelectionCells([vertex, edge]);
graph.scrollCellToVisible(vertex);
}
};
/**
* Function: installDropHandler
*
* Makes the given img draggable using the given function for handling a
* drop event.
*
* Parameters:
*
* img - DOM node that represents the image.
* dropHandler - Function that handles a drop of the image.
*/
mxDefaultToolbar.prototype.installDropHandler = function (img, dropHandler)
{
var sprite = document.createElement('img');
sprite.setAttribute('src', img.getAttribute('src'));
// Handles delayed loading of the images
var loader = mxUtils.bind(this, function(evt)
{
// Preview uses the image node with double size. Later this can be
// changed to use a separate preview and guides, but for this the
// dropHandler must use the additional x- and y-arguments and the
// dragsource which makeDraggable returns much be configured to
// use guides via mxDragSource.isGuidesEnabled.
sprite.style.width = (2 * img.offsetWidth) + 'px';
sprite.style.height = (2 * img.offsetHeight) + 'px';
mxUtils.makeDraggable(img, this.editor.graph, dropHandler,
sprite);
mxEvent.removeListener(sprite, 'load', loader);
});
if (mxClient.IS_IE)
{
loader();
}
else
{
mxEvent.addListener(sprite, 'load', loader);
}
};
/**
* Function: destroy
*
* Destroys the <toolbar> associated with this object and removes all
* installed listeners. This does normally not need to be called, the
* <toolbar> is destroyed automatically when the window unloads (in IE) by
* <mxEditor>.
*/
mxDefaultToolbar.prototype.destroy = function ()
{
if (this.resetHandler != null)
{
this.editor.graph.removeListener('dblclick', this.resetHandler);
this.editor.removeListener('escape', this.resetHandler);
this.resetHandler = null;
}
if (this.toolbar != null)
{
this.toolbar.destroy();
this.toolbar = null;
}
};
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