Transparent RichEditCtrl

256 colors

Hicolor

Environment: VC5, NT4 SP3

CRichEditCtrlEx is derived from CRichEditCtrl and contains two methods for create the control.

The background of a rich control could be changed using SetBackgroundColor() method. When the display has 256 colors the RGB value from SetBackgroundColor() method is converted into an apropiate color from system palette. So I created a pattern brush with the desired RGB value with I filled the control in OnErasebkgnd() method. I have also treated the invalidate message because the control being transparent didn't actualize itself.

The first image is taken from a 256 color display adapter and the second from a 16 bit one.

The method MsgFilterRich() is used for treatment the mouse or key events.

Downloads

Download demo project - 23 KB


Comments

  • Transparency While The Window is Hidden

    Posted by Legacy on 05/02/2003 12:00am

    Originally posted by: TDS

    My Problem is I Want Text From The RichEditCtrl While the Window is Hidden With Transparent Backgrnd.
    For this Problem I Had Used Ur Code But While The Window is Hidden WM_PAINT Mesage Gets Posted Continously To The Parent Window .
    Regard
    TDS

    Reply
  • Could you tell me my mistake? Please~

    Posted by Legacy on 08/01/2001 12:00am

    Originally posted by: Moon Joon Sik

    error C2440: 'initializing' : cannot convert from 'class std::list<class CString,class std::allocator<class CString> >::const_iterator' to 'class std::list<class CString,class std::allocator<class
    CString> >::iterator'

    This is an error message. I don't know why error occur. Please teach me~ Have a good time~ Bye~

    Reply
  • Transparency in RichEdit2

    Posted by Legacy on 04/08/2001 12:00am

    Originally posted by: Anton Riabov

    Rich edit 2.0 (and higher) can be made transparent with WS_EX_TRANSPARENT style, and any kind of background can be put under it with minimal flickering, as long as parent window redraws only the modified rectangle. Hope this helps.

    Reply
  • Flicker on scroll

    Posted by Legacy on 08/12/1999 12:00am

    Originally posted by: Bob Cozzi

    The knowledge that we can use the transparent style is great. I've needed to draw (water mark style) for a long time.

    The problem is that when I use the transparent style, the scroll feature causes a mud slide. The text smears across the screen while it is scrolled, and never recovers.

    To resolve this I have to update the entire window, but the problem is, the Erase background routine causes the entire RichEdit control to blink. This is not acceptable. :(

    Redraw(FALSE) doesn't work and I can't seem to get at the RichEdit control's ITextDocument to try to do a Freeze() method. Very close, but for me it isn't working good enough. :( Any Ideas?

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • U.S. companies are desperately trying to recruit and hire skilled software engineers and developers, but there is simply not enough quality talent to go around. Tiempo Development is a nearshore software development company. Our headquarters are in AZ, but we are a pioneer and leader in outsourcing to Mexico, based on our three software development centers there. We have a proven process and we are experts at providing our customers with powerful solutions. We transform ideas into reality.

  • Lenovo recommends Windows 8 Pro. "I dropped my laptop getting out of the taxi." This probably sounds familiar to most IT professionals. If your employees are traveling, you know their devices are in for a rough go. Whether it's a trip to the conference room or a convention out of town, any time equipment leaves a user's desk it is at risk of being put into harm's way. Stay connected at all times, whether at the office or on the go, with agile, durable, and flexible devices like the Lenovo® …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date