/// <summary>
/// The method renders the specified page's layers to a System.Drawing.Bitmap.
/// </summary>
/// <param name="doc">Document whose layers should be rendered</param>
/// <param name="pg">page to render</param>
/// <param name="parms">the DrawParams object</param>
static void DrawLayersToGraphics(Document doc, Page pg, DrawParams parms)
{
IList <OptionalContentGroup> ocgs = doc.OptionalContentGroups;
if (ocgs.Count > 0)
{
List <bool> states = new List <bool>(new bool[ocgs.Count]);
for (int i = 0; i < ocgs.Count; ++i)
{
states[i] = true;
using (OptionalContentContext occ = new OptionalContentContext(doc))
{ // Render and save current layer
occ.SetOCGStates(ocgs, states);
parms.OptionalContentContext = occ;
DrawLayerToGraphics(pg, parms, ocgs[i].Name);
// return DrawParams to its initial value
parms.OptionalContentContext = null;
}
states[i] = false;
}
}
}
static void Main(string[] args)
{
Console.WriteLine("ListLayers Sample:");
// ReSharper disable once UnusedVariable
using (Library lib = new Library())
{
Console.WriteLine("Initialized the library.");
String sInput = Library.ResourceDirectory + "Sample_Input/Layers.pdf";
if (args.Length > 0)
{
sInput = args[0];
}
Console.WriteLine("Input file: " + sInput);
Document doc = new Document(sInput);
IList <OptionalContentGroup> ocgs = doc.OptionalContentGroups;
foreach (OptionalContentGroup ocg in ocgs)
{
Console.WriteLine(ocg.Name);
Console.Write(" Intent: [");
if (ocg.Intent.Count > 0)
{
IEnumerator <String> i = ocg.Intent.GetEnumerator();
i.MoveNext();
Console.Write(i.Current);
while (i.MoveNext())
{
Console.Write(", ");
Console.Write(i.Current);
}
}
Console.WriteLine("]");
}
OptionalContentContext ctx = doc.OptionalContentContext;
Console.Write("Optional content states: [");
IList <bool> states = ctx.GetOCGStates(ocgs);
if (states.Count > 0)
{
IEnumerator <bool> i = states.GetEnumerator();
i.MoveNext();
Console.Write(i.Current);
while (i.MoveNext())
{
Console.Write(", ");
Console.Write(i.Current);
}
}
Console.WriteLine("]");
}
}
public void CreateLayerItems(Document doc)
{
DestroyLayers();
if (doc == null)
{
layersInDocument = new List <LayerItems>();
return;
}
int controlHeight = 0;
docLayerContext = new OptionalContentContext(doc);
docLayers = doc.OptionalContentGroups;
ocgStates = docLayerContext.GetOCGStates(docLayers);
if (docLayers.Count > 1)
{
// create the master layer control, turns on/off all layers
masterLayer = new LayerItems(this.Width);
masterLayer.layerName.Text = "All Layers";
masterLayer.Location = new System.Drawing.Point(0, controlHeight);
masterLayer.displayLayer.Name = "Master";
masterLayer.printLayer.Name = "Master";
// add the events for when the checkboxes are clicked
masterLayer.displayLayer.Click += new EventHandler(dleController.displayLayer_Click);
masterLayer.printLayer.Click += new EventHandler(dleController.printLayer_Click);
// increase the height (y coordinate) so we do not overlap controls
controlHeight += 65;
// add the controls we just created to the layer manager
this.Controls.Add(masterLayer);
}
layersInDocument = new List <LayerItems>(docLayers.Count);
// create the layer items for all of the other layers that exist
for (int i = 0; i < docLayers.Count; i++)
{
layersInDocument.Insert(i, new LayerItems(this.Width));
layersInDocument[i].layerName.Text = doc.OptionalContentGroups[i].Name;
layersInDocument[i].Location = new System.Drawing.Point(0, controlHeight);
// add the events for when the checkboxes are clicked
layersInDocument[i].displayLayer.Click += new EventHandler(dleController.displayLayer_Click);
layersInDocument[i].printLayer.Click += new EventHandler(dleController.printLayer_Click);
controlHeight += 65;
}
foreach (LayerItems l in layersInDocument)
{
this.Controls.Add(l);
}
this.Invalidate();
}
public void Load(Document doc, Page page, Datalogics.PDFL.Point scale, OptionalContentContext occ)
{
Clear();
SetPageParam(doc, page, scale, occ);
Tile fullPage = Create(CropRect);
if (fullPage.IsValid)
{
fullBitmap = fullPage.TileBitmap;
}
else
{
tiles[0, 0] = Create(tiles[0, 0].TileRect);
}
}
/**
* destroyLayers -
*
* Remove the controls for each layer and clear the list of
* layers. Used when we open a new document.
*/
public void DestroyLayers()
{
docLayers = null;
docLayerContext = null;
ocgStates = null;
if (layersInDocument != null)
{
// remove the control for each layer
foreach (LayerItems l in layersInDocument)
{
this.Controls.Remove(l);
}
layersInDocument.Clear();
layersInDocument = null;
// remove the master control also
if (masterLayer != null)
{
this.Controls.Remove(masterLayer);
}
}
}
public void SetPageParam(Document doc, Page page, Datalogics.PDFL.Point scale, OptionalContentContext occ)
{
this.scale = scale;
//this.page = page;
this.doc = doc;
this.pageNum = page.PageNumber;
this.occ = occ;
SetPageRotate(page.Rotation);
Rect cropBoxScaled = TransformRectByPageParam(page.CropBox, scale);
cropRect = new Rectangle();
cropRect.Width = (int)cropBoxScaled.Width;
cropRect.Height = (int)cropBoxScaled.Height;
TileSize = new Size(1600, 1600);
CreatePageTiles();
}