Programming Forums > Application Development > C#

most hacker · Feb 27th, 2010, 4:23 AM

Hi developers

I'm developing a simple text editor using c#.net … the whole idea is based on using the RichTextBox component provided by the dot net. I'm facing a serious problem that I couldn't solve at all, I tried to look for the solution on codeproject but it seems like all the text editor projects available there have the same problem I have

Simply the problem is :
I apply a text style for some portion of text … for example I apply bold style
Then I select another portion of text and apply italic to it
And here is the problem , when I select both texts and apply underline to them I get them all underlined but I lose both the bold effect and the italic effect

| figured out that the source of the problem is the Font class so I thought it will be good to modify it, but it's locked, they mark this class as sealed class so this is the end

Help me with that guys, I really got tired with this problem
Here is the code for the methods that toggle bold, italic and underline.

Bold

(Toggle Plain Text)

            if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null)
                return;

            System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style;

            if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Bold)
                style &= ~System.Drawing.FontStyle.Bold;
            else
                style |= System.Drawing.FontStyle.Bold;

            Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style);

Italic

(Toggle Plain Text)

            if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null)
                return;
            System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style;

            if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Italic)
                style &= ~System.Drawing.FontStyle.Italic;
            else
                style |= System.Drawing.FontStyle.Italic;
            Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style);

Underline

(Toggle Plain Text)

            if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null)
                return;
            System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style;

            if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Underline)
                style &= ~System.Drawing.FontStyle.Underline;
            else
                style |= System.Drawing.FontStyle.Underline;
            Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style);

Feb 27th, 2010, 4:23 AM	#1
most hacker Newbie Join Date: Jan 2010 Posts: 8 Rep Power: 0	Serious RichTextBox problem Hi developers I'm developing a simple text editor using c#.net … the whole idea is based on using the RichTextBox component provided by the dot net. I'm facing a serious problem that I couldn't solve at all, I tried to look for the solution on codeproject but it seems like all the text editor projects available there have the same problem I have Simply the problem is : I apply a text style for some portion of text … for example I apply bold style Then I select another portion of text and apply italic to it And here is the problem , when I select both texts and apply underline to them I get them all underlined but I lose both the bold effect and the italic effect \| figured out that the source of the problem is the Font class so I thought it will be good to modify it, but it's locked, they mark this class as sealed class so this is the end Help me with that guys, I really got tired with this problem Here is the code for the methods that toggle bold, italic and underline. Bold (Toggle Plain Text) if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null) return; System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style; if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Bold) style &= ~System.Drawing.FontStyle.Bold; else style \|= System.Drawing.FontStyle.Bold; Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style); if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null) return; System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style; if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Bold) style &= ~System.Drawing.FontStyle.Bold; else style \|= System.Drawing.FontStyle.Bold; Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style); Italic (Toggle Plain Text) if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null) return; System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style; if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Italic) style &= ~System.Drawing.FontStyle.Italic; else style \|= System.Drawing.FontStyle.Italic; Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style); if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null) return; System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style; if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Italic) style &= ~System.Drawing.FontStyle.Italic; else style \|= System.Drawing.FontStyle.Italic; Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style); Underline (Toggle Plain Text) if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null) return; System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style; if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Underline) style &= ~System.Drawing.FontStyle.Underline; else style \|= System.Drawing.FontStyle.Underline; Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style); if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont == null) return; System.Drawing.FontStyle style = Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Style; if (Program.mainForm.ActiveMdiChild.richBox.SelectionFont.Underline) style &= ~System.Drawing.FontStyle.Underline; else style \|= System.Drawing.FontStyle.Underline; Program.mainForm.ActiveMdiChild.richBox.SelectionFont = new System.Drawing.Font(Program.mainForm.ActiveMdiChild.richBox.SelectionFont, style);

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Programming Forums > Application Development > C#

Serious RichTextBox problem