drawing selection box

[Kristof Nachtergaele]

Hi,

i'm working on something in which i'm using a panel to arrange icons/text
on. Now I want to add the possibility to click - drag - release, and while
dragging display a retangle indicating the selected area. Anyone able to
give me a hint on how to handle this?

Thanks,
Kristof

[Vijaye Raji]

Surprisingly, .Net GDI doesn't provide an XOR draw operation. Therefore it
becomes non-trivial to draw a rubber-band line or a drag rectangle, like the
one you are describing. One way I got this solved is using Native GDI
calls, like Rectangle(...) and passing in the Graphics object's DC handle to
it. You can do an XOR draw and erase it the same way.

Hope this helps

-vJ
"Kristof Nachtergaele" <ik**@nie.com> wrote in message
news:3f***********************@reader0.news.skynet .be...

Hi,

i'm working on something in which i'm using a panel to arrange icons/text
on. Now I want to add the possibility to click - drag - release, and while
dragging display a retangle indicating the selected area. Anyone able to
give me a hint on how to handle this?

Thanks,
Kristof

[woodBeeProgrammer]

here's an unabashed plug for BobPowell's Gdi+Faq and
tools:
http://www.bobpowell.net/faqmain.htm
http://www.bobpowell.net/rband.htm

HTH!

-----Original Message-----
Surprisingly, .Net GDI doesn't provide an XOR draw operation. Therefore itbecomes non-trivial to draw a rubber-band line or a drag rectangle, like theone you are describing. One way I got this solved is using Native GDIcalls, like Rectangle(...) and passing in the Graphics object's DC handle toit. You can do an XOR draw and erase it the same way.

Hope this helps

-vJ
"Kristof Nachtergaele" <ik**@nie.com> wrote in message
news:3f***********************@reader0.news.skyne t.be...

Hi,

i'm working on something in which i'm using a panel to arrange icons/text on. Now I want to add the possibility to click - drag - release, and while dragging display a retangle indicating the selected area. Anyone able to give me a hint on how to handle this?

Thanks,
Kristof

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