HomeDownloadsSource Code LibraryImages (8)Show image anchor positions using GDI+

Show image anchor positions using GDI+

Author:	TX Text Control Support Department
Language:	C#
Version:	1.0
Released:	April 25, 2007
Last modified:	January 11, 2008
Requirements:	TX Text Control .NET with .NET C#
Download code:	tx_showanchorpositions.zip  [10.54 KB, ZIP]

As of TX Text Control 12.0, images can be anchored to a paragraph. This mode allows end-users to insert an image with a geometrical position relative to a paragraph. Text flows around the image. If additional text is inserted in front of the parent paragraph, the image is moved with the text.

In documents, into which such images have been inserted, it is often necessary to know to which paragraph a specific image is anchored.

To visualize the parent position in a text, an anchor icon drawn onto TextControl using GDI+.

The TextPosition property of the Image class can be used in combination with the InputPosition class to retrieve the location at which the icon should be placed. Additionally, this sample displays the image filename and the image size in Pixel above the image.

The following code shows how to calculate the anchor position:

g = textControl1.CreateGraphics();
 
Image anchorImage = Bitmap.FromStream(GetEmbeddedFile("tx_showanchorpositions.anchor.gif"));
textControl1.InputPosition = new TXTextControl.InputPosition(curImage.TextPosition);
 
Point anchorPos = new Point((textControl1.InputPosition.Location.X _
                  - textControl1.ScrollLocation.X - 400) / twipsPerPixel, _
                  (textControl1.InputPosition.Location.Y - _
                  textControl1.ScrollLocation.Y) / twipsPerPixel);
 
Point imagePos = new Point(anchorPos.X + (curImage.Location.X / twipsPerPixel) + 30 _
                 , anchorPos.Y + (curImage.Location.Y / twipsPerPixel) - 15);
 
g.DrawImage(anchorImage, anchorPos);

The sample requires Visual Studio 2005 and at least a TX Text Control .NET 13.0 trial version.

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