Solved

RichTextBox BackgroundImage or alternatives

Posted on 2009-05-14
4
2,509 Views
Last Modified: 2013-12-17
I've created a program that I wanted to add skins to. Of course the label has a built in backgroundImage property, however richtextboxes don't... I successfully got overwrote the onpaint handler for the textbox but it doesn't paint the text over the background, I can only assume that somewhere along the way the background is getting painted over the text when the control is redrawn.

If there is an alternative control that allows me to format multiple lines of text with different font styles and colors, please do tell....otherwise i'm stuck trying to figure out how to get a background image on these things for my friend to make skins for my program.

Here's the code that works, but obviously not well enough:
public class myRichTextBox : RichTextBox
	{
		private Image IMAGE = Image.FromFile(Application.StartupPath + @"\custom\realTimeDisplay.jpg");
 
		public myRichTextBox()
		{
			base.SetStyle(ControlStyles.UserPaint, true);
		}
 
		public override Image BackgroundImage
		{
			get
			{
				return IMAGE;
			}
			set
			{
				IMAGE = value;
			}
		}
 
		protected override void OnPaint(PaintEventArgs e)
		{
			base.OnPaint(e);
		}
	}

Open in new window

0
Comment
Question by:Nitinol
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
4 Comments
 
LVL 16

Expert Comment

by:CuteBug
ID: 24383228
0
 

Author Comment

by:Nitinol
ID: 24391800
I've found another solution, but when I set the selected text, it overlaps over the text...

Is there a way to keep it from overlapping?
	public class TransparentRichTextBox : RichTextBox
	{
		public TransparentRichTextBox()
		{
			base.ScrollBars = RichTextBoxScrollBars.None;
		}
 
		override protected CreateParams CreateParams
		{
			get
			{
				CreateParams cp = base.CreateParams;
				cp.ExStyle |= 0x20;
				return cp;
			}
		}
 
		override protected void OnPaintBackground(PaintEventArgs e)
		{
		}
	}

Open in new window

0
 

Author Comment

by:Nitinol
ID: 24392747
Anyone out there who can help me with the overlapping text problem when scrolling? Why is it so hard to put a background image on a box, when labels and other controls do it so easily?

I will also accept alternative controls that might do what I need them to do.

Thanks in advance.
0
 

Accepted Solution

by:
Nitinol earned 0 total points
ID: 24393599
well I decided to go with listview's instead since it appears i'm not going to get any help with transparency for the richtextbox.

Oh well. I tried. I've browsed about every post ever made on how to get a textbox to scroll once it's transparent, but with no luck.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
This is a high-level webinar that covers the history of enterprise open source database use. It addresses both the advantages companies see in using open source database technologies, as well as the fears and reservations they might have. In this…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…

695 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question