/// <summary>Loads the image from the given file</summary>
/// <param name="filename">The file to load from</param>
public void LoadFromFile(String filename)
{
XmlTextReader reader = null;
try
{
// Open the file
reader = new XmlTextReader(filename);
// Read to the root and determine the file version
int version = 0;
while(reader.Read())
{
if(reader.NodeType == XmlNodeType.Element && reader.Name == "schets")
{
// Determine the version
while(reader.MoveToNextAttribute())
{
if(reader.Name == "version")
{
try
{
version = reader.ReadContentAsInt();
break;
}
catch(Exception)
{ throw new Exception("De versie lijkt in een verkeerd formaat te staan."); }
}
}
break;
}
}
if(version != 1)
throw new Exception("Foutieve bestandsversie: " + version + ".");
// Read the layers
try
{
layers.Clear();
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.EndElement && reader.Name == "schets")
break;
else if (reader.NodeType == XmlNodeType.Element && reader.Name.StartsWith("layer"))
{
// Determine the layer type
Layer layer = null;
switch (reader.Name)
{
case LayerText.XML_NAME:
layer = new LayerText(new Point(0, 0), Color.Black, "");
break;
case LayerLine.XML_NAME:
layer = new LayerLine(new Point(0, 0), new Point(1, 1), 3.0f, Color.Black);
break;
case LayerRectFilled.XML_NAME:
layer = new LayerRectFilled(new Point(0, 0), new Point(1, 1), Color.Black);
break;
case LayerRectOpen.XML_NAME:
layer = new LayerRectOpen(new Point(0, 0), new Point(1, 1), 3.0f, Color.Black);
break;
case LayerEllipseFilled.XML_NAME:
layer = new LayerEllipseFilled(new Point(0, 0), new Point(1, 1), Color.Black);
break;
case LayerEllipseOpen.XML_NAME:
layer = new LayerEllipseOpen(new Point(0, 0), new Point(1, 1), 3.0f, Color.Black);
break;
case LayerPath.XML_NAME:
layer = new LayerPath(new Point(0, 0), 3.0f, Color.Black);
break;
case LayerBitmap.XML_NAME:
layer = new LayerBitmap(new Point(0, 0), new Bitmap(1,1));
break;
}
// Read the actual layer contents
if (layer != null)
{
layer.ReadFromXml(reader);
layers.Add(layer);
}
}
else throw new Exception(reader.Name);
}
}
catch(XmlException e)
{ throw new Exception(e.Message); }
catch(Exception e)
{ throw new Exception("Er is een onverwachte fout opgetreden! Foutmelding: " + e.Message); }
}
catch(UnauthorizedAccessException)
{ throw new Exception("U heeft niet de juiste rechten om het bestand te openen voor lezen."); }
catch(System.IO.DirectoryNotFoundException)
{ throw new Exception("Kon het bestand niet vinden."); }
finally
{
// Close the file
reader.Close();
}
}
public override void Letter(SchetsControl s, char c)
{
if (c >= 32)
{
// If we're editting a layer, add the character to the layer
// if we're not editting a layer, we create a new text layer containing the character
if(edittingLayer == null)
{
s.Schets.Layers.Add(edittingLayer = new LayerText(this.startpunt, color, new String(c, 1)));
((LayerText) edittingLayer).Editting = true;
}
else
((LayerText) edittingLayer).Text += c;
s.Invalidate();
}
else if(c == '\b' && edittingLayer != null && ((LayerText) edittingLayer).Text.Length > 0)
{
// If the user pressed backspace
((LayerText)edittingLayer).Text = ((LayerText)edittingLayer).Text.Substring(0, ((LayerText)edittingLayer).Text.Length - 1);
s.Invalidate();
}
}