private void _rasterImageViewer_PostImagePaint(object sender, PaintEventArgs e)
{
if (_selectedText != null && _selectedText[_currentPageNumber] != null)
{
HighlightSelectedWords(e.Graphics);
}
if (HighlightObjects && _document != null)
{
PDFDocumentPage page = _document.Pages[_currentPageNumber - 1];
HighlightObjectsData data = new HighlightObjectsData();
data.TextBrush = new SolidBrush(Color.FromArgb(128, Color.Yellow));
data.RetangleBrush = new SolidBrush(Color.FromArgb(128, Color.Black));
data.ImageBrush = new SolidBrush(Color.FromArgb(128, Color.Red));
data.HyperlinkBrush = new SolidBrush(Color.FromArgb(128, Color.Blue));
data.InternalLinkBrush = new SolidBrush(Color.FromArgb(128, Color.Green));
DrawHighlightObjects(e.Graphics, data, page);
DrawLegends(e.Graphics, data);
data.TextBrush.Dispose();
data.RetangleBrush.Dispose();
data.ImageBrush.Dispose();
data.HyperlinkBrush.Dispose();
data.InternalLinkBrush.Dispose();
}
}
private void DrawHighlightObjects(Graphics g, HighlightObjectsData data, PDFDocumentPage page)
{
LeadMatrix mm = _rasterImageViewer.GetImageTransformWithDpi(true);
Matrix m = new Matrix((float)mm.M11, (float)mm.M12, (float)mm.M21, (float)mm.M22, (float)mm.OffsetX, (float)mm.OffsetY);
Transformer trans = new Transformer(m);
// Clip to the current image bounds
RectangleF clipRect = new RectangleF(0, 0, _rasterImageViewer.Image.ImageWidth, _rasterImageViewer.Image.ImageHeight);
clipRect = trans.RectangleToPhysical(clipRect);
g.SetClip(clipRect);
// Draw objects
if (page.Objects != null)
{
foreach (PDFObject obj in page.Objects)
{
RectangleF rc = ToRectangleF(page.ConvertRect(PDFCoordinateType.Pdf, PDFCoordinateType.Pixel, obj.Bounds));
rc = trans.RectangleToPhysical(rc);
// Highlight it
Brush brush;
if (obj.ObjectType == PDFObjectType.Image)
{
brush = data.ImageBrush;
}
else if (obj.ObjectType == PDFObjectType.Rectangle)
{
brush = data.RetangleBrush;
}
else
{
brush = data.TextBrush;
}
DrawRectangle(g, brush, rc);
}
}
// Draw internal and hyper links
foreach (PageLink link in _pageLinks)
{
RectangleF rc = trans.RectangleToPhysical(new RectangleF(link.ImageBounds.X, link.ImageBounds.Y, link.ImageBounds.Width, link.ImageBounds.Height));
Brush brush;
if (link.InternalLinkIndex != -1)
{
brush = data.InternalLinkBrush;
}
else
{
brush = data.HyperlinkBrush;
}
DrawRectangle(g, brush, rc);
}
}
private void DrawLegends(Graphics g, HighlightObjectsData data)
{
GraphicsState state = g.Save();
g.ResetClip();
SizeF textSize = g.MeasureString("WWW", Font);
RectangleF rc = new RectangleF(0, 0, _rasterImageViewer.ClientRectangle.Width, textSize.Height);
g.FillRectangle(Brushes.White, rc);
g.DrawString("Legends: ", Font, Brushes.Black, 0, 0);
float x = g.MeasureString("Legends: ", Font).Width + 1;
string[] texts =
{
"Text",
"Rectangle",
"Image",
"Hyperlink",
"InternalLink",
};
Brush[] brushes =
{
data.TextBrush,
data.RetangleBrush,
data.ImageBrush,
data.HyperlinkBrush,
data.InternalLinkBrush,
};
rc.Inflate(-1, -2);
rc.Width = rc.Height;
for (int i = 0; i < texts.Length; i++)
{
rc.X = x;
DrawRectangle(g, brushes[i], rc);
x += rc.Width + 1;
g.DrawString(texts[i], Font, Brushes.Black, x, 1);
x += g.MeasureString(texts[i], Font).Width + 8;
}
g.Restore(state);
}
void _rasterImageViewer_PostRender(object sender, Leadtools.Controls.ImageViewerRenderEventArgs e)
{
PDFDocumentPage page = _document.Pages[_currentPageNumber - 1];
if (_selectedText != null && _selectedText[_currentPageNumber] != null)
{
HighlightSelectedWords(e.PaintEventArgs.Graphics);
}
if (HighlightObjects && _document != null)
{
HighlightObjectsData data = new HighlightObjectsData();
data.TextBrush = new SolidBrush(Color.FromArgb(128, Color.Yellow));
data.RetangleBrush = new SolidBrush(Color.FromArgb(128, Color.Black));
data.ImageBrush = new SolidBrush(Color.FromArgb(128, Color.Red));
data.HyperlinkBrush = new SolidBrush(Color.FromArgb(128, Color.Blue));
data.InternalLinkBrush = new SolidBrush(Color.FromArgb(128, Color.Green));
DrawHighlightObjects(e.PaintEventArgs.Graphics, data, page);
DrawLegends(e.PaintEventArgs.Graphics, data);
data.TextBrush.Dispose();
data.RetangleBrush.Dispose();
data.ImageBrush.Dispose();
data.HyperlinkBrush.Dispose();
data.InternalLinkBrush.Dispose();
}
if (_highlightSelectedImageObject && !HighlightObjects)
{
using (Brush imageBrush = new SolidBrush(Color.FromArgb(128, Color.Red)))
{
DrawHighlightImageObject(e.PaintEventArgs.Graphics, imageBrush, page);
}
}
}
