drawing rubberband line...
- Thread starter lidds
- Start date
This is one way of doing it:
http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraskdr/html/askgui02172004.asp
Alex
http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraskdr/html/askgui02172004.asp
Alex
Hi, just knocked up a simple program to give you an idea. Rubber bands are a nightmare! If you dont have many primitives to store say up to 10,000 then this technique will do. Otherwise you will need to create a bit map to display the primitives. Using XOR to rub out lines is the traditional way to go, but .net does not have this, except using API calls!
Hope this helps
Hope this helps
Last edited by a moderator:
Thanks I will give this a go tonight.
Just another question, at the moment I have managed to allow the user to draw a line and text onto a existing bmp image (will post code if needed, but do not have access to it at the moment) but what I want to be able to do is identify existing lines, text etc. that have been placed and give the user the option to modify or delete the items without having to go down the MS Paint way of rubbing out the graphics. Any ideas or am I getting into difficult coding??
Cheers
Simon
Just another question, at the moment I have managed to allow the user to draw a line and text onto a existing bmp image (will post code if needed, but do not have access to it at the moment) but what I want to be able to do is identify existing lines, text etc. that have been placed and give the user the option to modify or delete the items without having to go down the MS Paint way of rubbing out the graphics. Any ideas or am I getting into difficult coding??
Cheers
Simon
Hi, I would strongly recommend that you take a look at Bob Powells site:
http://www.bobpowell.net/faqmain.htm
in particular:
http://www.bobpowell.net/manipulate_graphics.htm
there is a wealth of info on the site, let us know if it was of any help
http://www.bobpowell.net/faqmain.htm
in particular:
http://www.bobpowell.net/manipulate_graphics.htm
there is a wealth of info on the site, let us know if it was of any help
thenerd
Centurion
This is kind of off topic, but what is a rubber band line?
thenerd said:
A good example is a selection rectangle, which is seen in, may applications including the Visual Studio designer. For example you click the mouse and drag a rectangle over some objects and when you let go the objects are selected. The rubber band part is where the rectangle stretches to follow the mouse. Rubber band line are used extensively in drawing packages
Hope I make sense!
Wile
Junior Contributor
So it would be something like these two ?:
http://www.codeproject.com/cs/miscctrl/CSharpRectTracker.asp
http://www.codeproject.com/cs/miscctrl/CSPickBoxSample1.asp
http://www.codeproject.com/cs/miscctrl/CSharpRectTracker.asp
http://www.codeproject.com/cs/miscctrl/CSPickBoxSample1.asp