internal /*?? protected */ virtual void ChangeModelState(ModelChangedEventArgs e, bool undo)
{
if ((int)e.Change > (int)ModelChange.Property)
{
ModelHelper.Error((IDiagramModel)this, "ChangeModelState did not handle ModelChange." + e.Change.ToString());
}
}
/// <summary>
/// Raise the <see cref="PropertyChanged"/> event.
/// </summary>
/// <param name="e"></param>
public virtual void OnPropertyChanged(ModelChangedEventArgs e)
{
if (this.PropertyChanged != null)
{
this.PropertyChanged(this, e);
}
}
/// <summary>
/// This is called during undo or redo to effect state changes to this model.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// <para>
/// This is called by <see cref="ChangeModel"/>.
/// You will want to override this method to handle properties that you
/// have added to your derived model class.
/// </para>
/// <para>
/// By default this uses reflection to set the <see cref="PropertyChangedEventArgs.PropertyName"/>
/// to the <see cref="ModelChangedEventArgs.OldValue"/> or the
/// <see cref="ModelChangedEventArgs.NewValue"/>, depending on the value of <paramref name="undo"/>.
/// </para>
/// <para>
/// If you override this method, remember to call the base method for all
/// cases that your override method does not handle.
/// </para>
/// </remarks>
protected virtual void ChangeModelValue(ModelChangedEventArgs e, bool undo)
{
if (e == null)
{
return;
}
if (e.PropertyName == "Name")
{
this.Name = (String)e.GetValue(undo);
}
else if (e.PropertyName == "DataFormat")
{
this.DataFormat = (String)e.GetValue(undo);
}
else if (e.PropertyName == "Modifiable")
{
this.Modifiable = (bool)e.GetValue(undo);
}
else if (ModelHelper.SetProperty(e.PropertyName, this, e.GetValue(undo)))
{
return; // successful set of model property
}
else
{
ModelHelper.Error((IDiagramModel)this, "Override ChangeModelValue to handle ModelChangedEventArgs of a model property: " + e.ToString());
}
}
/// <summary>
/// This is called during an Undo or a Redo to actually make state
/// changes to this model or to this model's data.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// <para>
/// When <paramref name="e"/>'s <see cref="ModelChangedEventArgs.Change"/>
/// value is <see cref="ModelChange.Property"/>,
/// this calls <see cref="ChangeModelValue"/>
/// if the <see cref="ModelChangedEventArgs.Data"/> is this model,
/// or else it calls <see cref="ChangeDataValue"/>.
/// </para>
/// <para>
/// This method handles all other <see cref="ModelChange"/> cases,
/// since they are all predefined.
/// </para>
/// </remarks>
public void ChangeModel(ModelChangedEventArgs e, bool undo)
{
if (e == null)
{
return;
}
bool old = this.IsChangingModel;
//ModelHelper.Trace((undo ? "undo: " : "redo: ") + e.ToString());
try {
this.IsChangingModel = true;
if (e.Change == ModelChange.Property)
{
Object data = e.Data;
if (data == null)
{
data = this;
}
if (data == this) // changes to programmer defined properties on the model
{
ChangeModelValue(e, undo);
}
else // changes to some data inside the model
{
ChangeDataValue(e, undo);
}
}
else
{
ChangeModelState(e, undo);
}
} finally {
this.IsChangingModel = old;
}
}
/// <summary>
/// Create an <see cref="IUndoableEdit"/> for a <see cref="IDiagramModel.Changed"/> event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <remarks>
/// This calls <see cref="SkipEvent"/> if for some reason we should ignore
/// the <paramref name="e"/>.
/// This then creates a <see cref="ModelChangedEventArgs"/> and adds it to the
/// <see cref="CurrentEdit"/>, a <see cref="UndoManager.CompoundEdit"/> which it allocates
/// if needed.
/// This method always ignores all Changed events while we are performing an
/// <see cref="Undo"/> or <see cref="Redo"/>.
/// </remarks>
public virtual void HandleModelChanged(Object sender, ModelChangedEventArgs e)
{
// changes caused by performing an undo or redo should be ignored!
if (this.IsUndoingRedoing)
{
return;
}
if (!SkipEvent(e))
{
CompoundEdit cedit = this.CurrentEdit;
//ModelHelper.Trace(this.TransactionLevel, e.ToString());
if (cedit == null)
{
cedit = new CompoundEdit();
this.CurrentEdit = cedit;
}
// make a copy of the event to save as an edit in the list
ModelChangedEventArgs edit = new ModelChangedEventArgs(e);
cedit.Edits.Add(edit);
if (this.ChecksTransactionLevel && this.TransactionLevel <= 0)
{
ModelHelper.Trace("Change not within a transaction: " + edit.ToString());
}
}
}
/// <summary>
/// Raise a <see cref="Changed"/> event, given before and after values for a particular property.
/// </summary>
/// <param name="propname">a property name</param>
/// <param name="data">the object whose property has just changed</param>
/// <param name="oldval">the previous value for the property</param>
/// <param name="newval">the new value for the property</param>
/// <remarks>
/// This is the mostly commonly used way to notify about changes to the model or to the model's data.
/// </remarks>
/// <seealso cref="RaiseChanged(ModelChangedEventArgs)"/>
/// <seealso cref="RaisePropertyChanged(String, Object, Object, Object, Object, Object)"/>
public void RaisePropertyChanged(String propname, Object data, Object oldval, Object newval)
{
ModelChangedEventArgs e = new ModelChangedEventArgs(propname, data, oldval, newval);
e.Model = (IDiagramModel)this;
e.Change = ModelChange.Property;
OnChanged(e);
}
/// <summary>
/// This predicate is responsible for deciding if a <see cref="ModelChangedEventArgs"/>
/// is not interesting enough to be recorded.
/// </summary>
/// <param name="evt"></param>
/// <returns>normally false, which causes the given event to be remembered;
/// but true for negative valued enumerations of <see cref="ModelChange"/>.</returns>
/// <remarks>
/// </remarks>
protected virtual bool SkipEvent(ModelChangedEventArgs evt)
{
if (evt == null)
{
return(true);
}
return((int)evt.Change < (int)ModelChange.Property);
}
/// <summary>
/// This method implements the <see cref="IChangeDataValue"/> interface,
/// used to perform state changes for undo and redo.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// Unless you override this method to explicitly handle each property that you define,
/// this implementation uses reflection to set the property.
/// </remarks>
public virtual void ChangeDataValue(ModelChangedEventArgs e, bool undo)
{
if (e == null)
{
return;
}
if (e.PropertyName == "Location")
{
this.Location = (Point)e.GetValue(undo);
}
else if (e.PropertyName == "Text")
{
this.Text = (String)e.GetValue(undo);
}
else if (e.PropertyName == "Key")
{
this.Key = (NodeKey)e.GetValue(undo);
}
else if (e.PropertyName == "FromKeys")
{
this.FromKeys = (IList <NodeKey>)e.GetValue(undo);
}
else if (e.PropertyName == "ToKeys")
{
this.ToKeys = (IList <NodeKey>)e.GetValue(undo);
}
else if (e.PropertyName == "IsSubGraph")
{
this.IsSubGraph = (bool)e.GetValue(undo);
}
else if (e.PropertyName == "IsSubGraphExpanded")
{
this.IsSubGraphExpanded = (bool)e.GetValue(undo);
}
else if (e.PropertyName == "WasSubGraphExpanded")
{
this.WasSubGraphExpanded = (bool)e.GetValue(undo);
}
else if (e.PropertyName == "SubGraphKey")
{
this.SubGraphKey = (NodeKey)e.GetValue(undo);
}
else if (e.PropertyName == "MemberKeys")
{
this.MemberKeys = (IList <NodeKey>)e.GetValue(undo);
}
else if (e.PropertyName == "Category")
{
this.Category = (String)e.GetValue(undo);
}
else if (e.Change == ModelChange.Property)
{
if (!ModelHelper.SetProperty(e.PropertyName, e.Data, e.GetValue(undo)))
{
ModelHelper.Error("ERROR: Unrecognized property name: " + e.PropertyName != null ? e.PropertyName : "(noname)" + " in GraphModelNodeData.ChangeDataValue");
}
}
}
private void RaiseChanged(IDiagramModel model, ModelChange change, Object data, Object oldval, Object newval)
{
ModelChangedEventArgs e = new ModelChangedEventArgs();
e.Model = model;
e.Change = change;
e.Data = data;
e.OldValue = oldval;
e.NewValue = newval;
model.RaiseChanged(e);
}
internal void RaiseModelChanged(ModelChange change, Object data, Object oldval, Object newval)
{
ModelChangedEventArgs e = new ModelChangedEventArgs();
e.Model = (IDiagramModel)this;
e.Change = change;
e.Data = data;
e.OldValue = oldval;
e.NewValue = newval;
OnChanged(e);
}
/// <summary>
/// This is basically a "copy constructor", making a copy of the given <see cref="ModelChangedEventArgs"/>.
/// </summary>
/// <param name="e"></param>
public ModelChangedEventArgs(ModelChangedEventArgs e) : base(e.PropertyName) { // "copy constructor"
if (e != null) {
this.Model = e.Model;
this.Change = e.Change;
this.Data = e.Data;
this.OldValue = e.OldValue;
this.OldParam = e.OldParam;
this.NewValue = e.NewValue;
this.NewParam = e.NewParam;
}
//if (this.Model != null) {
// this.Model.CopyOldValueForUndo(this); //?? optimize memory usage
// this.Model.CopyNewValueForRedo(this);
//}
}
/// <summary>
/// This is basically a "copy constructor", making a copy of the given <see cref="ModelChangedEventArgs"/>.
/// </summary>
/// <param name="e"></param>
public ModelChangedEventArgs(ModelChangedEventArgs e) : base(e.PropertyName) // "copy constructor"
{
if (e != null)
{
this.Model = e.Model;
this.Change = e.Change;
this.Data = e.Data;
this.OldValue = e.OldValue;
this.OldParam = e.OldParam;
this.NewValue = e.NewValue;
this.NewParam = e.NewParam;
}
//if (this.Model != null) {
// this.Model.CopyOldValueForUndo(this); //?? optimize memory usage
// this.Model.CopyNewValueForRedo(this);
//}
}
/// <summary>
/// This is called during undo or redo to effect state changes to model data.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// <para>
/// This is called by <see cref="ChangeModel"/>.
/// You will want to override this method to handle properties that you
/// have added to your model data classes.
/// Or you can have your data classes implement <see cref="IChangeDataValue"/>
/// to achieve the same effect.
/// </para>
/// <para>
/// By default this just calls <see cref="IChangeDataValue.ChangeDataValue"/>
/// if the <see cref="ModelChangedEventArgs.Data"/> implements <see cref="IChangeDataValue"/>.
/// Otherwise this uses reflection to set the <see cref="PropertyChangedEventArgs.PropertyName"/>
/// to the <see cref="ModelChangedEventArgs.OldValue"/> or the
/// <see cref="ModelChangedEventArgs.NewValue"/>, depending on the value of <paramref name="undo"/>.
/// </para>
/// <para>
/// If you override this method, remember to call the base method for all
/// cases that your override method does not handle.
/// </para>
/// </remarks>
protected virtual void ChangeDataValue(ModelChangedEventArgs e, bool undo)
{
if (e == null)
{
return;
}
Object data = e.Data;
IChangeDataValue changeable = data as IChangeDataValue;
if (changeable != null)
{
changeable.ChangeDataValue(e, undo);
}
else if (ModelHelper.SetProperty(e.PropertyName, data, e.GetValue(undo)))
{
return; // successful set of data property
}
else
{
ModelHelper.Error((IDiagramModel)this, "Override ChangeDataValue to handle ModelChangedEventArgs.Data, or have data implement IChangeDataValue: " + data.ToString());
}
}
/// <summary>
/// Given an <see cref="IUndoableEdit"/> return an edited object
/// that represents what was modified.
/// </summary>
/// <param name="edit">
/// an <see cref="IUndoableEdit"/>,
/// usually either a <see cref="ModelChangedEventArgs"/> or a <see cref="CompoundEdit"/>
/// </param>
/// <returns>
/// typically a <see cref="Node"/> or a <see cref="Link"/>,
/// but this may be null if there is no such object,
/// perhaps because a model property was modified,
/// or because there were no real edits in the argument <paramref name="edit"/>.
/// </returns>
public virtual Object FindPrimaryObject(IUndoableEdit edit)
{
ModelChangedEventArgs ea = edit as ModelChangedEventArgs;
if (ea != null)
{
return(ea.Data);
}
CompoundEdit ce = edit as CompoundEdit;
if (ce != null)
{
foreach (IUndoableEdit e in ce.Edits)
{
Object data = FindPrimaryObject(e);
if (data != null)
{
return(data);
}
}
}
return(null);
}
/// <summary>
/// Raises the <see cref="Changed"/> event.
/// </summary>
/// <param name="e">an edit describing the change that just happened</param>
/// <remarks>
/// If you override this method, be sure to call the base method first.
/// </remarks>
protected virtual void OnChanged(ModelChangedEventArgs e)
{
if (e == null)
{
return;
}
if (_ChangedEvent != null)
{
_ChangedEvent(this, e);
}
if (!this.SkipsUndoManager && !this.Initializing)
{
UndoManager um = this.UndoManager;
if (um != null)
{
um.HandleModelChanged(this, e);
}
if (((int)e.Change) >= (int)ModelChange.Property)
{
this.IsModified = true;
}
}
}
/// <summary>
/// This is called during undo or redo to effect state changes to model data.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// <para>
/// This is called by <see cref="ChangeModel"/>.
/// You will want to override this method to handle properties that you
/// have added to your model data classes.
/// Or you can have your data classes implement <see cref="IChangeDataValue"/>
/// to achieve the same effect.
/// </para>
/// <para>
/// By default this just calls <see cref="IChangeDataValue.ChangeDataValue"/>
/// if the <see cref="ModelChangedEventArgs.Data"/> implements <see cref="IChangeDataValue"/>.
/// Otherwise this uses reflection to set the <see cref="PropertyChangedEventArgs.PropertyName"/>
/// to the <see cref="ModelChangedEventArgs.OldValue"/> or the
/// <see cref="ModelChangedEventArgs.NewValue"/>, depending on the value of <paramref name="undo"/>.
/// </para>
/// <para>
/// If you override this method, remember to call the base method for all
/// cases that your override method does not handle.
/// </para>
/// </remarks>
protected virtual void ChangeDataValue(ModelChangedEventArgs e, bool undo) {
if (e == null) return;
Object data = e.Data;
IChangeDataValue changeable = data as IChangeDataValue;
if (changeable != null) {
changeable.ChangeDataValue(e, undo);
} else if (ModelHelper.SetProperty(e.PropertyName, data, e.GetValue(undo))) {
return; // successful set of data property
} else {
ModelHelper.Error((IDiagramModel)this, "Override ChangeDataValue to handle ModelChangedEventArgs.Data, or have data implement IChangeDataValue: " + data.ToString());
}
}
/// <summary>
/// This is called during undo or redo to effect state changes to this model.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// <para>
/// This is called by <see cref="ChangeModel"/>.
/// You will want to override this method to handle properties that you
/// have added to your derived model class.
/// </para>
/// <para>
/// By default this uses reflection to set the <see cref="PropertyChangedEventArgs.PropertyName"/>
/// to the <see cref="ModelChangedEventArgs.OldValue"/> or the
/// <see cref="ModelChangedEventArgs.NewValue"/>, depending on the value of <paramref name="undo"/>.
/// </para>
/// <para>
/// If you override this method, remember to call the base method for all
/// cases that your override method does not handle.
/// </para>
/// </remarks>
protected virtual void ChangeModelValue(ModelChangedEventArgs e, bool undo) {
if (e == null) return;
if (e.PropertyName == "Name") {
this.Name = (String)e.GetValue(undo);
} else if (e.PropertyName == "DataFormat") {
this.DataFormat = (String)e.GetValue(undo);
} else if (e.PropertyName == "Modifiable") {
this.Modifiable = (bool)e.GetValue(undo);
} else if (ModelHelper.SetProperty(e.PropertyName, this, e.GetValue(undo))) {
return; // successful set of model property
} else {
ModelHelper.Error((IDiagramModel)this, "Override ChangeModelValue to handle ModelChangedEventArgs of a model property: " + e.ToString());
}
}
/// <summary>
/// This is called during an Undo or a Redo to actually make state
/// changes to this model or to this model's data.
/// </summary>
/// <param name="e">an edit describing the change to be performed</param>
/// <param name="undo">true if undoing; false if redoing</param>
/// <remarks>
/// <para>
/// When <paramref name="e"/>'s <see cref="ModelChangedEventArgs.Change"/>
/// value is <see cref="ModelChange.Property"/>,
/// this calls <see cref="ChangeModelValue"/>
/// if the <see cref="ModelChangedEventArgs.Data"/> is this model,
/// or else it calls <see cref="ChangeDataValue"/>.
/// </para>
/// <para>
/// This method handles all other <see cref="ModelChange"/> cases,
/// since they are all predefined.
/// </para>
/// </remarks>
public void ChangeModel(ModelChangedEventArgs e, bool undo) {
if (e == null) return;
bool old = this.IsChangingModel;
//ModelHelper.Trace((undo ? "undo: " : "redo: ") + e.ToString());
try {
this.IsChangingModel = true;
if (e.Change == ModelChange.Property) {
Object data = e.Data;
if (data == null) data = this;
if (data == this) { // changes to programmer defined properties on the model
ChangeModelValue(e, undo);
} else { // changes to some data inside the model
ChangeDataValue(e, undo);
}
} else {
ChangeModelState(e, undo);
}
} finally {
this.IsChangingModel = old;
}
}
internal void RaiseModelChanged(ModelChange change, Object data, Object oldval, Object oldparam, Object newval, Object newparam) {
ModelChangedEventArgs e = new ModelChangedEventArgs();
e.Model = (IDiagramModel)this;
e.Change = change;
e.Data = data;
e.OldValue = oldval;
e.OldParam = oldparam;
e.NewValue = newval;
e.NewParam = newparam;
OnChanged(e);
}
/// <summary>
/// Raise a <see cref="Changed"/> event for a property change.
/// </summary>
/// <param name="propname">a property name</param>
/// <param name="data">the object whose property has just changed</param>
/// <param name="oldval">the previous value for the property</param>
/// <param name="oldparam">additional information for the old value</param>
/// <param name="newval">the new value for the property</param>
/// <param name="newparam">additional information for the new value</param>
/// <remarks>
/// This is not used as frequently as <see cref="RaisePropertyChanged(String, Object, Object, Object)"/>.
/// Typically the parameter values are used as indexes into the <paramref name="data"/>,
/// to identify the particular value that was changed.
/// </remarks>
/// <seealso cref="RaiseChanged(ModelChangedEventArgs)"/>
/// <seealso cref="RaisePropertyChanged(String, Object, Object, Object)"/>
public void RaisePropertyChanged(String propname, Object data, Object oldval, Object oldparam, Object newval, Object newparam) {
ModelChangedEventArgs e = new ModelChangedEventArgs(propname, data, oldval, newval);
e.Model = (IDiagramModel)this;
e.Change = ModelChange.Property;
e.OldParam = oldparam;
e.NewParam = newparam;
OnChanged(e);
}
/// <summary>
/// Raise a <see cref="Changed"/> event, given a <see cref="ModelChangedEventArgs"/>.
/// </summary>
/// <param name="e">an edit describing the change that just happened</param>
/// <remarks>
/// This just calls <see cref="OnChanged"/>.
/// This method is public because it is part of the implementation of <see cref="IDiagramModel"/>.
/// </remarks>
public void RaiseChanged(ModelChangedEventArgs e) {
OnChanged(e);
}
/// <summary>
/// This predicate is responsible for deciding if a <see cref="ModelChangedEventArgs"/>
/// is not interesting enough to be recorded.
/// </summary>
/// <param name="evt"></param>
/// <returns>normally false, which causes the given event to be remembered;
/// but true for negative valued enumerations of <see cref="ModelChange"/>.</returns>
/// <remarks>
/// </remarks>
protected virtual bool SkipEvent(ModelChangedEventArgs evt) {
if (evt == null) return true;
return (int)evt.Change < (int)ModelChange.Property;
}
/// <summary>
/// This is called for each <see cref="Northwoods.GoXam.Model.IDiagramModel.Changed"/> event.
/// </summary>
/// <param name="e"></param>
/// <remarks>
/// <para>
/// The implementation of this method and the methods that it calls should not modify the model.
/// </para>
/// <para>
/// For small changes such as the addition or removal of node data from the model,
/// this calls the <see cref="AddNodeForData"/> or <see cref="RemoveNodeForData"/> method.
/// </para>
/// <para>
/// For changes in link relationships in the model, this calls
/// <see cref="AddLinkForData(Object, Northwoods.GoXam.Model.IDiagramModel)"/>,
/// <see cref="AddLinkForData(Object, Object, Northwoods.GoXam.Model.IDiagramModel)"/>,
/// <see cref="RemoveLinkForData(Object, Northwoods.GoXam.Model.IDiagramModel)"/>, or
/// <see cref="RemoveLinkForData(Object, Object, Northwoods.GoXam.Model.IDiagramModel)"/>.
/// </para>
/// <para>
/// For more wholescale changes, such as a change in the <see cref="Northwoods.GoXam.Model.IDiagramModel.NodesSource"/>,
/// this will call <see cref="RebuildNodeElements"/> to discard all existing nodes and links and reconstruct
/// them using the appropriate (and perhaps changed) data templates.
/// For widespread changes only involving links, this will call <see cref="RebuildLinkElements"/>.
/// </para>
/// </remarks>
public virtual void OnModelChanged(ModelChangedEventArgs e) {
if (e == null) return;
if (e.Change == ModelChange.Property) {
if (this.UpdatesRouteDataPoints && e.PropertyName == "Points") {
Link link = FindLinkForData(e.Data, this.Diagram.Model);
if (link != null && !this.IsUpdatingRouteDataPoints) {
this.IsUpdatingRouteDataPoints = true;
IList<Point> pts = e.NewValue as IList<Point>;
if (pts != null && pts.Count() > 1) {
link.Route.Points = pts;
} else {
link.Route.ClearPoints();
}
this.IsUpdatingRouteDataPoints = false;
}
}
return;
}
VerifyAccess();
switch (e.Change) {
// data properties
case ModelChange.ReplacedReference:
if (FindNodeForData(e.OldValue, e.Model) != null) {
RemoveNodeForData(e.OldValue, e.Model);
}
if (FindLinkForData(e.OldValue, e.Model) != null) {
RemoveLinkForData(e.OldValue, e.Model);
}
break;
// model contents and relationships
case ModelChange.AddedNode:
AddNodeForData(e.Data, e.Model);
break;
case ModelChange.RemovingNode:
// called before node data is actually removed from the model,
// when relationships (e.g. with containing group) are known;
// but won't be called if Model.NodesSource is changed directly,
// but will be called if someone calls Model.RemoveNode/DeleteNode
RemoveNodeForData(e.Data, e.Model);
break;
case ModelChange.RemovedNode:
// called after node data is actually removed from the model,
// but old node data relationships might already be lost
RemoveNodeForData(e.Data, e.Model);
break;
case ModelChange.ChangedParentNodeKey: {
IDiagramModel model = e.Model;
if (model != null) {
Object child = e.Data;
if (e.OldValue != null) RemoveLinkForData(model.FindNodeByKey(e.OldValue), child, model);
if (e.NewValue != null) AddLinkForData(model.FindNodeByKey(e.NewValue), child, model);
}
break;
}
case ModelChange.AddedFromNodeKey: {
IDiagramModel model = e.Model;
if (model != null) {
AddLinkForData(model.FindNodeByKey(e.NewValue), e.Data, model);
}
break;
}
case ModelChange.RemovedFromNodeKey: {
IDiagramModel model = e.Model;
if (model != null) {
RemoveLinkForData(model.FindNodeByKey(e.OldValue), e.Data, model);
}
break;
}
case ModelChange.AddedChildNodeKey:
case ModelChange.AddedToNodeKey: {
IDiagramModel model = e.Model;
if (model != null) {
AddLinkForData(e.Data, model.FindNodeByKey(e.NewValue), model);
}
break;
}
case ModelChange.RemovedChildNodeKey:
case ModelChange.RemovedToNodeKey: {
IDiagramModel model = e.Model;
if (model != null) {
RemoveLinkForData(e.Data, model.FindNodeByKey(e.OldValue), model);
}
break;
}
case ModelChange.ChangedFromNodeKeys: {
Object node = e.Data;
if (node != null) {
IDiagramModel model = e.Model;
if (model != null) {
System.Collections.IEnumerable oldneighborkeys = e.OldValue as System.Collections.IEnumerable;
System.Collections.IEnumerable newneighborkeys = e.NewValue as System.Collections.IEnumerable;
if (oldneighborkeys != null) {
foreach (Object n in oldneighborkeys) {
if (newneighborkeys == null || !ContainsKey(newneighborkeys, n)) {
RemoveLinkForData(model.FindNodeByKey(n), node, model);
}
}
}
if (newneighborkeys != null) {
foreach (Object n in newneighborkeys) {
if (oldneighborkeys == null || !ContainsKey(oldneighborkeys, n)) {
AddLinkForData(model.FindNodeByKey(n), node, model);
}
}
}
}
}
break;
}
case ModelChange.ChangedChildNodeKeys:
case ModelChange.ChangedToNodeKeys: {
Object node = e.Data;
if (node != null) {
IDiagramModel model = e.Model;
if (model != null) {
System.Collections.IEnumerable oldneighborkeys = e.OldValue as System.Collections.IEnumerable;
System.Collections.IEnumerable newneighborkeys = e.NewValue as System.Collections.IEnumerable;
if (oldneighborkeys != null && model != null) {
foreach (Object n in oldneighborkeys) {
if (newneighborkeys == null || !ContainsKey(newneighborkeys, n)) {
RemoveLinkForData(node, model.FindNodeByKey(n), model);
}
}
}
if (newneighborkeys != null && model != null) {
foreach (Object n in newneighborkeys) {
if (oldneighborkeys == null || !ContainsKey(oldneighborkeys, n)) {
AddLinkForData(node, model.FindNodeByKey(n), model);
}
}
}
}
}
break;
}
case ModelChange.ChangedGroupNodeKey: {
IDiagramModel model = e.Model;
if (model != null) {
Node oldsg = FindNodeForData(model.FindNodeByKey(e.OldValue), model);
if (oldsg != null) {
oldsg.InvalidateRelationships("GroupNodeChanged");
}
Node newsg = FindNodeForData(model.FindNodeByKey(e.NewValue), model);
if (newsg != null) {
newsg.InvalidateRelationships("GroupNodeChanged");
newsg.SortZOrder();
}
Node node = FindNodeForData(e.Data, model);
if (node != null) {
foreach (Link l in node.LinksConnected) UpdateCachedMembership(model, l);
if (oldsg != null)
OnMemberRemoved(oldsg, node);
else if (newsg != null) // and oldsg == null
InvalidateDiagramLayout(node, LayoutChange.NodeRemoved);
if (newsg != null)
OnMemberAdded(newsg, node);
else if (oldsg != null) // and newsg == null
InvalidateDiagramLayout(node, LayoutChange.NodeAdded);
}
}
break;
}
case ModelChange.ChangedMemberNodeKeys: {
Object node = e.Data;
if (node != null) {
IDiagramModel model = e.Model;
if (model != null) {
Node groupnode = FindNodeForData(node, model);
System.Collections.IEnumerable oldmemberkeys = e.OldValue as System.Collections.IEnumerable;
System.Collections.IEnumerable newmemberkeys = e.NewValue as System.Collections.IEnumerable;
if (oldmemberkeys != null && model != null) {
foreach (Object mk in oldmemberkeys) {
if (newmemberkeys == null || !ContainsKey(newmemberkeys, mk)) {
Node oldmember = FindNodeForData(model.FindNodeByKey(mk), model);
if (oldmember != null) {
oldmember.InvalidateRelationships("MemberNodeChanged");
foreach (Link l in oldmember.LinksConnected) UpdateCachedMembership(model, l);
if (groupnode != null)
OnMemberRemoved(groupnode, oldmember);
else
InvalidateDiagramLayout(oldmember, LayoutChange.NodeRemoved);
}
}
}
}
if (newmemberkeys != null && model != null) {
foreach (Object n in newmemberkeys) {
if (oldmemberkeys == null || !ContainsKey(oldmemberkeys, n)) {
Node newmember = FindNodeForData(model.FindNodeByKey(n), model);
if (newmember != null) {
newmember.InvalidateRelationships("MemberNodeChanged");
foreach (Link l in newmember.LinksConnected) UpdateCachedMembership(model, l);
newmember.SortZOrder();
if (groupnode != null)
OnMemberAdded(groupnode, newmember);
else
InvalidateDiagramLayout(newmember, LayoutChange.NodeAdded);
}
}
}
}
}
}
break;
}
case ModelChange.AddedMemberNodeKey: {
Object nkey = e.NewValue;
IDiagramModel model = e.Model;
if (model != null) {
Node newmember = FindNodeForData(model.FindNodeByKey(nkey), model);
if (newmember != null) {
newmember.InvalidateRelationships("MemberNodeAdded");
foreach (Link l in newmember.LinksConnected) UpdateCachedMembership(model, l);
newmember.SortZOrder();
Node groupnode = FindNodeForData(e.Data, model);
if (groupnode != null)
OnMemberAdded(groupnode, newmember);
else
InvalidateDiagramLayout(newmember, LayoutChange.NodeAdded);
}
}
break;
}
case ModelChange.RemovedMemberNodeKey: {
Object okey = e.OldValue;
IDiagramModel model = e.Model;
if (model != null) {
Node oldmember = FindNodeForData(model.FindNodeByKey(okey), model);
if (oldmember != null) {
oldmember.InvalidateRelationships("MemberNodeRemoved");
foreach (Link l in oldmember.LinksConnected) UpdateCachedMembership(model, l);
Node groupnode = FindNodeForData(e.Data, model);
if (groupnode != null)
OnMemberRemoved(groupnode, oldmember);
else
InvalidateDiagramLayout(oldmember, LayoutChange.NodeRemoved);
}
}
break;
}
case ModelChange.AddedLink:
AddLinkForData(e.Data, e.Model);
break;
case ModelChange.RemovingLink:
RemoveLinkForData(e.Data, e.Model);
break;
case ModelChange.RemovedLink:
RemoveLinkForData(e.Data, e.Model);
break;
case ModelChange.ChangedLinkFromPort:
case ModelChange.ChangedLinkToPort: {
Link link = FindLinkForData(e.Data, e.Model);
if (link != null) {
if (e.NewValue != null) {
// don't invalidate the route when disconnecting, only when connecting or reconnecting
link.Route.InvalidateRoute();
}
// reset the data binding, in case of bindings such as
// Stroke="{Binding Path=Link.FromNode.Data.Brush}"
PartBinding data = new PartBinding(link, e.Data);
link.Content = data;
link.DataContext = data;
}
break;
}
case ModelChange.ChangedLinkGroupNodeKey: {
Link link = FindLinkForData(e.Data, e.Model);
if (link != null) link.InvalidateRelationships("LinkGroupChanged");
IDiagramModel model = e.Model;
if (model != null) {
Node oldsg = FindNodeForData(model.FindNodeByKey(e.OldValue), model);
if (oldsg != null) oldsg.InvalidateRelationships("LinkGroupChanged");
Node newsg = FindNodeForData(model.FindNodeByKey(e.NewValue), model);
if (newsg != null) {
Group sg = newsg as Group;
if (sg != null && link != null) {
bool vis = sg.IsExpandedSubGraph;
if (link.Visible != vis) link.Visible = vis;
}
newsg.InvalidateRelationships("LinkGroupChanged");
}
}
break;
}
case ModelChange.ChangedLinkLabelKey: {
Link link = FindLinkForData(e.Data, e.Model);
if (link != null) link.InvalidateRelationships("LinkLabelChanged");
break;
}
case ModelChange.ChangedNodeKey: {
Node n = FindNodeForData(e.Data, e.Model);
if (n != null) {
n.InvalidateRelationships("NodeKeyChanged");
}
break;
}
case ModelChange.ChangedNodeCategory: {
Object nodedata = e.Data;
IDiagramModel model = e.Model;
Node node = FindNodeForData(nodedata, model);
if (node != null) {
bool wasselected = node.IsSelected;
RemoveNodeForData(nodedata, model);
AddNodeForData(nodedata, model);
if (wasselected) {
Node newnode = FindNodeForData(nodedata, model);
if (newnode != null) newnode.IsSelected = wasselected;
}
}
break;
}
case ModelChange.ChangedLinkCategory: {
Object linkdata = e.Data;
IDiagramModel model = e.Model;
Link link = FindLinkForData(linkdata, model);
if (link != null) {
bool wasselected = link.IsSelected;
RemoveLinkForData(linkdata, model);
AddLinkForData(linkdata, model);
if (wasselected) {
Link newlink = FindLinkForData(linkdata, model);
if (newlink != null) newlink.IsSelected = wasselected;
}
}
break;
}
case ModelChange.InvalidateRelationships: {
Node node = FindNodeForData(e.Data, e.Model);
if (node != null) {
node.Remeasure();
Diagram.InvokeLater(this.Diagram, () => { node.InvalidateRelationships("ChangedNodeGeometry"); });
}
break;
}
// model discovery
case ModelChange.ChangedNodesSource: {
Diagram diagram = this.Diagram;
IDiagramModel model = e.Model;
if (diagram != null && model != null && diagram.NodesSource != model.NodesSource) {
diagram.NodesSource = model.NodesSource;
}
RebuildNodeElements(); // also calls RebuildLinkElements
if (diagram != null && model != null && !model.IsChangingModel) {
diagram.RelayoutDiagram();
}
break;
}
case ModelChange.ChangedNodeKeyPath:
case ModelChange.ChangedNodeCategoryPath:
case ModelChange.ChangedNodeIsGroupPath:
case ModelChange.ChangedGroupNodePath:
case ModelChange.ChangedMemberNodesPath:
case ModelChange.ChangedNodeIsLinkLabelPath: {
RebuildNodeElements(); // also calls RebuildLinkElements
Diagram diagram = this.Diagram;
IDiagramModel model = e.Model;
if (diagram != null && model != null && !model.IsChangingModel) {
diagram.RelayoutDiagram();
}
break;
}
case ModelChange.ChangedLinksSource: {
Diagram diagram = this.Diagram;
IDiagramModel model = e.Model;
if (diagram != null && model != null) {
ILinksModel lmodel = model as ILinksModel;
if (lmodel != null && diagram.LinksSource != lmodel.LinksSource) {
diagram.LinksSource = lmodel.LinksSource;
}
}
RebuildLinkElements();
if (diagram != null && model != null && !model.IsChangingModel) {
diagram.RelayoutDiagram();
}
break;
}
case ModelChange.ChangedLinkFromPath:
case ModelChange.ChangedLinkToPath:
case ModelChange.ChangedFromNodesPath:
case ModelChange.ChangedToNodesPath:
case ModelChange.ChangedLinkLabelNodePath: {
RebuildLinkElements();
Diagram diagram = this.Diagram;
IDiagramModel model = e.Model;
if (diagram != null && model != null && !model.IsChangingModel) {
diagram.RelayoutDiagram();
}
break;
}
//case ModelChange.ChangedParentPortParameterPath:
//case ModelChange.ChangedChildPortParameterPath:
case ModelChange.ChangedLinkFromParameterPath:
case ModelChange.ChangedLinkToParameterPath:
case ModelChange.ChangedLinkCategoryPath:
RebuildLinkElements();
break;
case ModelChange.StartedTransaction:
//?? produce routed event
break;
case ModelChange.CommittedTransaction: {
//?? produce routed event
String reason = e.Data as String;
if (reason != "Layout" && reason != "DelayedRouting") { // check for this case to avoid infinite loop
Diagram diagram = this.Diagram;
if (diagram == null) break;
IDiagramModel model = diagram.Model;
if (model != null) model.ClearUnresolvedReferences();
DiagramPanel panel = diagram.Panel;
if (panel != null) panel.UpdateScrollTransform();
LayoutManager laymgr = diagram.LayoutManager;
if (laymgr != null) laymgr.InvokeLayoutDiagram("CommittedTransaction");
diagram.UpdateCommands();
}
break;
}
case ModelChange.RolledBackTransaction: {
//?? produce routed event
String reason = e.Data as String;
if (reason != "Layout" && reason != "DelayedRouting") { // check for this case to avoid infinite loop
Diagram diagram = this.Diagram;
if (diagram == null) break;
IDiagramModel model = diagram.Model;
if (model != null) model.ClearUnresolvedReferences();
diagram.UpdateCommands();
}
break;
}
case ModelChange.StartingUndo:
case ModelChange.StartingRedo:
break;
case ModelChange.FinishedUndo:
case ModelChange.FinishedRedo: {
//?? produce routed event
Diagram diagram = this.Diagram;
if (diagram == null) break;
DiagramPanel panel = diagram.Panel;
if (panel == null) break;
// force everything to be remeasured
foreach (UIElement elt in panel.Children) {
NodeLayer nlay = elt as NodeLayer;
if (nlay != null) {
if (nlay.IsTemporary) continue;
foreach (Node n in nlay.Nodes) {
n.Remeasure();
}
} else {
LinkLayer llay = elt as LinkLayer;
if (llay != null) {
if (llay.IsTemporary) continue;
foreach (Link l in llay.Links) {
l.Remeasure();
}
}
}
}
panel.UpdateScrollTransform();
panel.InvokeUpdateDiagramBounds("Undo/Redo");
diagram.UpdateCommands();
break;
}
// model state
case ModelChange.ChangedName:
case ModelChange.ChangedDataFormat:
case ModelChange.ChangedModifiable:
case ModelChange.ChangedValidCycle:
case ModelChange.ChangedValidUnconnectedLinks: {
Diagram diagram = this.Diagram;
if (diagram == null) break;
diagram.UpdateCommands();
break;
}
case ModelChange.ChangedCopyingGroupCopiesMembers:
case ModelChange.ChangedCopyingLinkCopiesLabel:
case ModelChange.ChangedRemovingGroupRemovesMembers:
case ModelChange.ChangedRemovingLinkRemovesLabel:
break;
default:
Diagram.Error("Diagram did not handle Model change: " + e.Change.ToString());
break;
}
}
private void ObservedPanel_AnimatingChanged(object sender, ModelChangedEventArgs e) {
if (sender is DiagramPanel) {
this.IsAnimatingScrolling = (bool)e.NewValue;
UpdateBox();
} else if (sender is LayoutManager) {
this.IsAnimatingLayout = (bool)e.NewValue;
// UpdateNodesAndLinks when no longer IsAnimating
if (!this.IsAnimatingLayout) {
UpdateNodesAndLinks();
}
}
}
/// <summary>
/// Raise a <see cref="Changed"/> event, given a <see cref="ModelChangedEventArgs"/>.
/// </summary>
/// <param name="e">an edit describing the change that just happened</param>
/// <remarks>
/// This just calls <see cref="OnChanged"/>.
/// This method is public because it is part of the implementation of <see cref="IDiagramModel"/>.
/// </remarks>
public void RaiseChanged(ModelChangedEventArgs e)
{
OnChanged(e);
}
private void RaiseChanged(IDiagramModel model, ModelChange change, Object data, Object oldval, Object newval) {
ModelChangedEventArgs e = new ModelChangedEventArgs();
e.Model = model;
e.Change = change;
e.Data = data;
e.OldValue = oldval;
e.NewValue = newval;
model.RaiseChanged(e);
}
internal /*?? protected */ virtual void ChangeModelState(ModelChangedEventArgs e, bool undo) {
if ((int)e.Change > (int)ModelChange.Property) {
ModelHelper.Error((IDiagramModel)this, "ChangeModelState did not handle ModelChange." + e.Change.ToString());
}
}
/// <summary>
/// Raises the <see cref="Changed"/> event.
/// </summary>
/// <param name="e">an edit describing the change that just happened</param>
/// <remarks>
/// If you override this method, be sure to call the base method first.
/// </remarks>
protected virtual void OnChanged(ModelChangedEventArgs e) {
if (e == null) return;
if (_ChangedEvent != null) _ChangedEvent(this, e);
if (!this.SkipsUndoManager && !this.Initializing) {
UndoManager um = this.UndoManager;
if (um != null) um.HandleModelChanged(this, e);
if (((int)e.Change) >= (int)ModelChange.Property) this.IsModified = true;
}
}
/// <summary>
/// Create an <see cref="IUndoableEdit"/> for a <see cref="IDiagramModel.Changed"/> event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <remarks>
/// This calls <see cref="SkipEvent"/> if for some reason we should ignore
/// the <paramref name="e"/>.
/// This then creates a <see cref="ModelChangedEventArgs"/> and adds it to the
/// <see cref="CurrentEdit"/>, a <see cref="UndoManager.CompoundEdit"/> which it allocates
/// if needed.
/// This method always ignores all Changed events while we are performing an
/// <see cref="Undo"/> or <see cref="Redo"/>.
/// </remarks>
public virtual void HandleModelChanged(Object sender, ModelChangedEventArgs e) {
// changes caused by performing an undo or redo should be ignored!
if (this.IsUndoingRedoing) return;
if (!SkipEvent(e)) {
CompoundEdit cedit = this.CurrentEdit;
//ModelHelper.Trace(this.TransactionLevel, e.ToString());
if (cedit == null) {
cedit = new CompoundEdit();
this.CurrentEdit = cedit;
}
// make a copy of the event to save as an edit in the list
ModelChangedEventArgs edit = new ModelChangedEventArgs(e);
cedit.Edits.Add(edit);
if (this.ChecksTransactionLevel && this.TransactionLevel <= 0) {
ModelHelper.Trace("Change not within a transaction: " + edit.ToString());
}
}
}
