This is the default behavior. The RichTextBox Control automatically finds a fallback font to represent characters that the current Font can’t handle. If not otherwise instructed, it changes the Font selection with the fallback Font. Read this rant about the same default behavior of the RichTextBox ancestor (the RichEdit / MsftEdit Control, from which the … Read more
A RichTextBox in WPF is simply an editor for a FlowDocument. According to MSDN: Text always wraps in a RichTextBox. If you do not want text to wrap then set the PageWidth on the FlowDocument to be larger than the width of the RichTextBox. However, once the page width is reached the text still wraps. … Read more
WPF RichTextBox control use Flow Document to display Rich Text and then attach the Flow Document to RTB control,while Windows Form RichTextBox control display Rich Text directly. that’s what makes WPF RTB super slow. if you are okay with using a WinForm RTB just host it in your wpf app. the xaml : <Window x:Class=”WpfHostWfRTB.MainWindow” … Read more
The RichTextBox.Text property is converting the assigned string into an rtf document according to the Rtf format codes specified in the RichTextBox.Rtf property. Since the ‘rtb’ instance is not being initialized the ‘Rtf’ format codes are empty, and it’s just echoing back your input. After ‘rtb’ is initialized it contains an empty rtf document (with … Read more
Adding a Unicode “Line Separator” (U+2028) does work as far as my testing showed: private void Form_Load(object sender, EventArgs e) { richText.AppendText(“Hello, World!\u2028”); richText.AppendText(“Hello, World!\u2028”); string rtf = richText.Rtf; richText.AppendText(rtf); } When I run the program, I get: Hello, World! Hello, World! {\rtf1\ansi\ansicpg1252\deff0\deflang1031{\fonttbl{\f0\fnil\fcharset0 Courier New;}} {\colortbl ;\red255\green255\blue255;} \viewkind4\uc1\pard\cf1\f0\fs17 Hello, World!\line Hello, World!\line\par } It did … Read more
I cannot give you any concrete help but in terms of architecture you need to change your layout from this To this Everything else is a hack. Your unit/glyph must become a word-chord-pair. Edit: I have been fooling around with a templated ItemsControl and it even works out to some degree, so it might be … Read more
I downloaded the sourcecode of Wordpad (http://download.microsoft.com/download/4/0/9/40946FEC-EE5C-48C2-8750-B0F8DA1C99A8/MFC/ole/wordpad.zip.exe) and it has the same worst performance (4 minutes). But this sample is an old version of Wordpad. So Microsoft has improved anything in Wordpad in the last years that is missing in the .NET framework. Finally I found the solution: The .NET framework uses the RichEdit20W class … Read more
Saddly I’ve done my VERY best effort to slim this down to only the required code. It’s still big, but it will work. The RichTextBox api in .Net is very limited, to do anything you almost have to thunk into the Win32 library. I’ve built a entire library around this thing just so I can … Read more
Here is complete and working example: private const int WM_USER = 0x0400; private const int EM_SETEVENTMASK = (WM_USER + 69); private const int WM_SETREDRAW = 0x0b; private IntPtr OldEventMask; [DllImport(“user32.dll”, CharSet=CharSet.Auto)] private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam); public void BeginUpdate() { SendMessage(this.Handle, WM_SETREDRAW, IntPtr.Zero, IntPtr.Zero); OldEventMask = (IntPtr)SendMessage(this.Handle, EM_SETEVENTMASK, … Read more
Just add ToolTip tool from toolbox to the form and add this code in a mousemove event of any control you want to make the tooltip start on its mousemove private void textBox3_MouseMove(object sender, MouseEventArgs e) { toolTip1.SetToolTip(textBox3,”Tooltip text”); // you can change the first parameter (textbox3) on any control you wanna focus } hope … Read more