Blocking or Erasing Text

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   After drawing text is there a reliable way to "erase" or otherwise block or blank the text?
Given:
DPL.SetTextColor(0,0,1); //Blue
DPL.DrawText(1,1, 'Test');

//text inserted

Later:
DPL.SetTextColor(1,1,1); //White?
DPL.DrawText(1,1, 'Test');

Result is a faint outline of text- not completely obscured.

Changing the text transparency setting does not influence text
already inserted.

Any ideas?

TIA,

John

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
JohnTMD Members Profile Find Members Posts Beginner Joined: 21 Jul 14 Location: United States Status: Offline Points: 16	Post Options Post Reply Quote JohnTMD Report Post Thanks(0) Quote Reply Topic: Blocking or Erasing Text Posted: 07 Jan 15 at 3:05PM
	After drawing text is there a reliable way to "erase" or otherwise block or blank the text? Given: DPL.SetTextColor(0,0,1); //Blue DPL.DrawText(1,1, 'Test'); //text inserted Later: DPL.SetTextColor(1,1,1); //White? DPL.DrawText(1,1, 'Test'); Result is a faint outline of text- not completely obscured. Changing the text transparency setting does not influence text already inserted. Any ideas? TIA, John

mLipok Members Profile Find Members Posts Senior Member Joined: 23 Apr 14 Location: Poland, Zabrze Status: Offline Points: 453	Post Options Post Reply Quote mLipok Report Post Thanks(0) Quote Reply Posted: 08 Jan 15 at 1:13AM
	Did you look here: http://www.quickpdf.org/forum/add-text-content-and-remove-later_topic2991.html
	Here you can find description how to test my examples: http://www.quickpdf.org/forum/forum_posts.asp?TID=2932&PID=12600&title=drawcapturedpagematrix-matrix-howto#12600

JohnTMD Members Profile Find Members Posts Beginner Joined: 21 Jul 14 Location: United States Status: Offline Points: 16	Post Options Post Reply Quote JohnTMD Report Post Thanks(0) Quote Reply Posted: 08 Jan 15 at 2:56PM
	Thanks so much. It looks promising, but, it appears that this method has complications and may not have been tested completely. I'm going to see if I can simply place a white block over the text, effectively erasing it. The question then becomes, what happens after each erasure and subsequently adding text. I'm open for suggestions, but, will report back if I find a simple, workable solution. I'm casting my vote for a new function, DeleteText(Horizontal,Vertical,Width,Height) or DeleteText(Horizontal,Vertical,'Original Text'). John