I am trying to build a simple syntax highlighter editor along with undo/redo feature. I have the code to syntax highlight the code on "TextChange" event but the undo/redo feature does not work.Any work arounds on implementing syntax highlighting with undo/redo?
View 2 Repliesi have written code for undo and redo operations code for undo operation
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now when i rotate the picture then tries to undo the image then this erorr comes Stack is Empty and program closes.
I understand that implementing an UnDo/ReDo function can be complex using Stack operation/XML serialization.
That is why I have started to search for commercial tools/components, but I could find such tools only for RealBasic, not for VB.net. Does anyone know where to get such tool/component, or has good example code to include various undoable operation into an Undo/Redo function, that means undo operation for datagrid and chart manipulation (similar to a spreadsheet application).
i need this option for a textbox. the undo/redo in two separate buttons and it should be for multiple times not just once.[code]
View 21 Replieshow to implement undo/redo in an application? I've searched the web, and most I found don't work properly or just clear the textbox.
View 9 RepliesAfter a rtf. file is loaded in richtextbox....then the user highlights the text with different colors.How can I set both redo and undo button to backward and forward the steps(only the part of higtlighting)?
View 19 RepliesI'm trying to setup undo/redo for changes to a datagridview, but am having a problem with capturing the cell value before it is changed. I am currently using the CellEnter event to capture the original value, which is fine if only one cell is affected. However, if the user selects multiple cells and goes to cut the data (Ctrl-X), CellEnter does not fire for each of the selected sells, only the ones moused over it seems. Is there a better way to capture each cell value before their CellValueChanged event fires?
View 1 RepliesI have a problem with my code. After I click undo I can't draw on the image and I don't know why
This is my code
Imports System.Drawing.Graphics
Imports System.Drawing.Bitmap
Imports System.Drawing
Public Class FrmChild
[Code] .....
I was wondering if there is a way to modify the limit on the number of undo/redo actions a RichTextBox is capable of performing. It seems as though the limit is around 100, and I really need to increase this because of the demands of my application. I have text formatting (Bold, Underline, etc.) in my application, and since you can change the font of the text, I need to loop through the characters in the SelectedText one-by-one and apply the correct formatting to them in order to prevent any errors from appearing. Every time a single character is formatted, it counts as an action. As you can imagine, this quickly adds up and therefore makes my undo/redo features not as useful as I'd hope with the 100-action limit. Does anyone have any suggestions for me?
View 3 Repliesi am developing one eform designer project..the main object of this project is there a form in this controls are drag and drop.moving and deleting and editing the properties ..it's like a our .net designer how we drag and drop the controls ..so in my project i need to implement undo/Redo functionality..please give me the basic idea of this..(Please think like a our .net Designer (UNDO/REDO))
View 2 Repliesbasically add and remove text and selection information from a stack. Result: When using Undo/Redo the selection got messed up, the text moved, sometimes causing lag of epic proportions. I need a way of having complete and smooth undo/redo class for storing all information I would possible need.How to know whether or not to add an undo stack is easy, I just checked if the user clicked in the text or moved using the arrow keys. As soon a previous marking was given for "next text change needs to be backed up", it was backed up. At that point I stored the RTF and selection start/length. What do I have to store of a RichTextbox control to be able to restore it to a previous state, and how can I reset it back to a previous state? See it as having a "RichTextBoxState" class:
Public Class RichTextBoxState
Sub New(ByVal RTB As RichTextBox)
Me.text = RTB.RTF
Me.selectionstart = RTB.SelectionStart
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After restoring it must display the EXACT same thing as when it was saved as a state.
Just finished a database for stock management system in local terms and language. All according to their request and agreement. Now they need me to add undo/redo functionality to the application and I just dont know where to start. I am looking first for a general tip on where to begin:
I have one form, for e.g., that manages their stores. Then another for catagories...now they need the undo for all this things and am not sure if it is even possible cos datas are related.
After getting the code below from here, I would like to learn how I can easily copy/paste and undo/redo actions. The code below allows a person to "draw" on the image.
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i want to implement undo/redo function in icon editor, im try to use arraylist or Stack to hold current icon or picturebox image when mouse up and left mouse is not press. i dont know exact place to put the Stack for push.
View 2 RepliesI have created a Form, added a MenuStrip to it and inserted the standard Items. My question is that I know some of the options won't work like 'Save' and 'Save As' but how do you make ones like 'Open' 'Exit' 'Undo' and Redo' work when start debugging?
View 9 RepliesI am having an issue trying to figure this out. I am writing a script editor that uses tabs (a tab control) and I want to implement syntax highlighting. My issue is that every sample I can find on syntax highlighting uses
Private Sub RichTextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox1.TextChanged
I've been trying to get syntax highlighting for a RichTextBox.I am struggling trying to code it myself, so I looked around a bit, and found a cool .dll file called ColorCode.
[URL]
So I went into my project and imported the ColorCode.dll file. (Project>Add Reference)However, I don't know how to use it!?Is there anyone out there that has used this .dll file?How can I use it to get Syntax Hilighting in RichTextBox1?
Looking in the "Display Items" list in the "Fonts and Colors" section of options, I don't see a way to color code dates. I can color numbers, strings, comments... all kinds of stuff, are Date and DateTime hiding under something else?
View 1 RepliesI've been looking everywhere for a solution to this problem. I'm new to VB, well programming in general, and am using VS2010 ultimate. Everything has been running smoothly until recently. For some reason, there is no syntax highlighting for my code. All other code is highlighted and colored correctly, just VB is not. All i get is black characters. Keywords, comments, everything is black! I have attempted to reset all the settings, and I have made sure that the font settings are all set to default.
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I have a richtextbox on my form and currently have made a simple syntax highlighting for it. It works great with a small amount of text but as the text amount increases it starts flashing and locks the textbox while typing.
This is my current code. I call the sub on the textchanged event.Basically what happens is I have a list of words that it checks for and if it finds it, it colors the word.
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I'm building an app that has an sql editor with syntax highlighting and intellisense. I've got the frame, but i'm stuck with the re-coloring of the RTBSuppose the RTB has got a large volume of lines. when i start editing, the on-textchange event triggers the re-coloring of the current line. using;
- selectionStart
- selectionLength
- selectionColor
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Ok, So i am building a code editor for a new Multi-Player modification thats being coded (IV-MP), And i was looking into making the syntax of the code highlight, Like it dose on this picture:
The code is 'Squirrel', But i totally have no clue on how to make it highlight like in those pictures, And all the code would be in a large Rich textbox.
I need help Related to this form [URL]...Related to that topic Using the same code how can i add more then one color so how can i add it more then once So like words = the and bob ect... but I make a new dim call it words 2 = for next then ect... diffrent color I do this and it cancels out the blue the first one, so like this
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So then i try it purple works but now blue does not..i know its possible with this one! All i want is to be able to add other words in a different color! Because this code works like a charm
I recently set up a Redmine server for my time. Redmine's Wiki uses CodeRay for syntax highlighting. However, most of my team prefers to code in VB.NET, which CodeRay doesn't support.Are there any plugins out there that offer syntax highlighting for VB.NET in CodeRay? If not in CodeRay, maybe through some other library (that could be integrated into Redmine)?
View 2 RepliesHow to add a Visual Basic .NET syntax highlighting to CodeMirror editor? Does exists the mode for this language on any library? What should I correct except keywords, blockKeywords and atoms? [code]
View 1 RepliesI want to have syntax highlighting for Java in RichTextBox1.
When the user entres "//" (without quotes), i want the "//" to turn green, while the rest of the text stays black.
i've started with:
If RichTextBox1.Text.ToLower.Contains("//") Then
'do something
End If
I am currently working on a code editor program for Linden Scripting Language (Second Life Code) and I am having a lot of trouble using the Syntax Highlighting class which i have found on a website [URL] I dont understand, the Class inherits the System.Windows.Forms.RichTextBox so it should change the color of the text if i type one of the keywords shouldnt it and i should not have to do any codeing for the RTB (or do i?)
View 5 RepliesI have the following
Private Sub RichTextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox1.TextChanged
Dim words As List(Of String) = New List(Of String)(New String() {"select", "insert", "delete", "truncate", _
"from", "where", "into", "inner", "update", "outer", "on", "is", "declare", "set", "use", "values", "as", _
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The only problem is that if I type one of the key words, the word highlights, but if i type a word with one of the key words within it, part of it gets highlights as well.Example:
drop
dropped
i planned to write a syntax highlighting application for a C/AL editor. I have a tool which has a little autocomplete function in C/AL.At first i would test it in my notepad. I thought about this procedure.1. Start application (minimized in tray, defined match words)2. Open Notepad (my application notice it)3. While typing the application the color of my text changes in notepad
View 4 RepliesDim listbox1 As New ListBox
listbox1.Items.Add("<br/>")
Dim int As Integer = 0
Dim line As String = RichTextBox1.GetLineFromCharIndex(RichTextBox1.SelectionStart)
For Each item In listbox1.Items
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My coding selects an item from the list box and tries to color the words in the currently selected line, however, it often colors characters that come after the instance. Why is this happening?