// make sure our algorithm is in the input array of IUnknown
// otherwise throw an exception
public override void SetObjects(uint cObjects, object[] ppUnk)
{
if (ppUnk == null || cObjects < 1)
{
throw new ArgumentNullException();
}
// remove previously stored IUnkown objects
Objects = null;
TranslateTree processedAlgo = null;
// browse input collection
System.Collections.IEnumerator enumCollection = ppUnk.GetEnumerator();
enumCollection.Reset();
while (enumCollection.MoveNext())
{
processedAlgo = enumCollection.Current as TranslateTree;
if (processedAlgo != null)
{
// assumes only one object is managed by this property page
Objects = new object[1];
Objects[0] = enumCollection.Current;
break;
}
}
if (Objects == null)
{
throw new ArgumentNullException();
}
}
protected override void OnPageApply()
{
//OnPageApply is launched two times when you click on Apply
//and one time if you have more one page and change page
//So I use a flag to authorize or not the application of algorithm
//The timer reset the flag, in case of multi-pages
timApply.Enabled = false;
base.OnPageApply();
TranslateTree myAlgo = FindOurAlgo();
if (myAlgo != null)
{
try
{
myAlgo.TranslationFactorX = System.Convert.ToDouble(this.txtXTrans.Text);
}
finally { }
try
{
myAlgo.TranslationFactorY = System.Convert.ToDouble(this.txtYTrans.Text);
}
finally { }
}
timApply.Enabled = true;
PageIsDirty = false;
}
private void btnRestore_Click(object sender, EventArgs e)
{
// Get the saved algorithm parameters from the diagram class
TranslateTree newAlgo = GetSavedAlgo();
if (newAlgo == null)
{
newAlgo = new TranslateTree(); // otherwise revert to default algorithm parameters
}
// get the values and set the edit boxes
txtXTrans.Text = newAlgo.TranslationFactorX.ToString();
txtYTrans.Text = newAlgo.TranslationFactorY.ToString();
}
private TranslateTree GetSavedAlgo()
{
TranslateTree myAlgo = FindOurAlgo();
if (myAlgo == null)
{
return(null);
}
ISchematicDiagramClassName diagramClassName = myAlgo.SchematicDiagramClassName;
IName pName = diagramClassName as IName;
if (pName == null)
{
return(null);
}
object unk = pName.Open();
ISchematicDiagramClass diagramClass = unk as ISchematicDiagramClass;
if (diagramClass == null)
{
return(null);
}
// get the default algorithms for this diagram class
IEnumSchematicAlgorithm enumAlgorithms = diagramClass.SchematicAlgorithms;
if (enumAlgorithms == null)
{
return(null);
}
TranslateTree savedAlgo = null;
enumAlgorithms.Reset();
ISchematicAlgorithm algorithm;
while ((algorithm = enumAlgorithms.Next()) != null)
{
savedAlgo = algorithm as TranslateTree;
if (savedAlgo != null)
{
break;
}
}
return(savedAlgo);
}
protected override void OnActivated(System.EventArgs e)
{
base.OnActivated(e);
TranslateTree myAlgo = FindOurAlgo();
if (myAlgo != null)
{
this.txtXTrans.Text = myAlgo.TranslationFactorX.ToString();
this.txtYTrans.Text = myAlgo.TranslationFactorY.ToString();
}
PageIsDirty = false;
}
private TranslateTree FindOurAlgo()
{
TranslateTree myAlgo = null;
// loop through the objects until the algorithm is found or not
System.Collections.IEnumerator enumCollection = Objects.GetEnumerator();
enumCollection.Reset();
while (enumCollection.MoveNext())
{
myAlgo = enumCollection.Current as TranslateTree;
if (myAlgo != null)
{
return(myAlgo); // found it
}
}
return(null);
}
