I'm implementing multi-level undo/redo via a pair of stacks. This works well, but I'd like to limit the number of undo actions (actually objects representing the state of the application) . Once the limit of actions in the stack has been reached, I want to keep adding actions to the stack, but get rid of the oldest (bottom) items as I go.
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I am developing an application, for a university project, which is using GDI to draw a flag, my application is also equiped with an undo stack, which is, essensially, where the problem is, so what happens is: I push the draw button to draw a box, when I do that, the solution normally creates the box and stores the object to the undo stack; however, when I ask it to undo the box, and refresh the panel, it randomly adds, endless threads to the undo stack, additionally, everytime that I set the panel to refresh in the undo procedure, it affects the draw procedure; therefore, when I tell it to draw a box, it fills the undo stach with five threads at a time, sometimes, it fills it with much more than five, and sometimes it keeps filling up the undo stack, untill I stop the debugging proccess. This is my code:
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I have a recursive function that causes a stackoverflow for big inputs. So I want to enlarge my stack. I have never worked with threads so maybe I'm doing something wrong but when I try to make a new thread, the description for the second argument (StackSize) says that if I use a stacksize bigger than the default one, this argument will be ignored and the default size will be used. How to increase the stacksize? Or how to create a thread with a bigger size than the default one?
View 3 RepliesHow can i increasing stack size on my ui thread from within the app?
my app is a paint program + causes a stackoverflow exception when using large bitmaps + redrawing
how can i increase the stack size on my ui thread from within my app?my app recursively draws onto a bitmap which is then displayed in a picturebox + only causes an error when i increase the size of the bitmap. i.e. the same drawing operation on a smaller bitmap works ok.
View 23 RepliesI'm writing a program that solves sudoku puzzles, but it keeps giving me StackOverflowException. I've tried to make it as efficient as possible, and cleaned up my code, but it still does this once it reaches a certain depth of recursion. how I can increase the stack size so that it can handle this recursion?
View 5 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.
Now all went well about from using the structure correctly. The working of the structure was perfect. How ever i missed Two important issues. The structure needed a fixed size of 10 items (9 in programming terms starting from 0) And also out of the 5 items allowed to be chosen as one of the member types for the structure a limit of 5 items of that particular type.
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How to Undo changes in a form?
View 7 RepliesI am working with a registry watcher but I can't block changes. I found this link [URL] but unfortunately one of the links posted was broken maybe because it was posted years ago. I tried searching for "undo file changes" on VB.NET using search engines but I can't find any.I am using VS2008 Express ed.
View 5 RepliesHow does the "Undo" operation work? Not looking for a specific code, I am just curious to how it works.
View 3 Repliesmy concern is tht i have a application with mail for my intranet users. Now I wld like to rollback or undo my sent message within a short interval say bfore a minute , i can or should undo . But im confused where to start from .....i need u guyz to just show me the correct way , i will try and do it by ma self
View 1 RepliesI want to put undo in a small program
View 10 RepliesI 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'm try to use the richtextbox undo method but when i use it the whole string is been deleted and not the last character
View 2 Repliesso i have 5 buttons and 5 labels.
when i press button 1 a "1" appears on label1.
now if i press button 1 three times, button 2 one time, button 5 four times, but the last press was wrong so i need to undo. i create a new button named undo, what would the code be for taking away like i said, not just for button5, for every button i set out but the undo button?
Has any one experienced this. Never seen it before. Anchoring a Toolstrip Left,Top,Right will resize the strip with out the option of stepping back and undoing it. Forces rolling back the application. Toolstrip is docked at the bottom.
View 2 RepliesI have a form with a FileListBox and 2 Button:... Button1 I would like To Undo my Last Action:...Button2 I would like to redo the Action, I have Been Looking For a code for These Buttons. In FileListBox I am Drilling Down through my files. So that Means if I double click on a file in FileListBox and I have gone to far I want the Undo Button (Button1) to show Previous Files that where shown).
View 6 RepliesI have two tables with referential integrity defined in the sql-database. parent: projectschild: projectlineI do not want projects to be deleted if projectlines exist.The projects are displayed in a datagridview.Here's part of the
Dim dbs As New databasedata.databasedata
Dim connstring As String = dbs.DatabaseConnection
Private dc As New DB2Linq.db2linqDataContext(connstring)
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i have created a flight booking application for my assignment. to complete it i need to create an undo button..
View 11 RepliesI am working on a Notepad like text editor and I'm trying to put an Undo function in it. When you click the undo menu, I want to simply undo the last action (added char, removed char, paste, delete...). It doesn't have do remember all the past actions, I just want it to undo the last action even if the last one was undo... For now I have a button in a tool strip menu (tsmAnnuler) and my richtextbox (rtbZoneTexte).
View 2 Repliesi am trying to make a really simple program to start with .It is for keeping score in a card game. The functionality of the program is 10 buttons(cards) that when you click them they dissapear and 4 buttons that when you click them they add or remove 1 point to two textboxs and one reset button that when you click it it resets everything.
I have done everything but now i want to make a undo button because when you missclick something it is really annoying you have to reset the whole thing and remember what exactly you had pressed before and this is not what i want. I googled a lot,i read a lot of threads here and in other forums but i mostly found web browsers undo buttons or i didnt understand what to do.
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 RepliesI try to implement undo in drawing program I want to save the bitmap after every drawing and push it to stack then when the user click the button it will change the image to the last bitmap saved in the stack here is my code
Private Sub PictureBox1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseUp
Xend = e.X
Yend = e.Y
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how 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 program that colors certain words, but when I do a Ctrl+Z, the textbox undoes the coloring. How do I make it stop undoing the coloring, and just the text that was edited?
View 4 RepliesI have created a game in VB.net 2005 that is very much like Sudoku. When the user clicks a button its number content increases by 1, when the user clicks the check button it gives them an error if incorrect, win if not. I need that same check button to apply the next action. I need to undo the last button click by the user when check is clicked. I know I need to build a container or something to record the button clicks and somehow draw on that when needed. hat I am even looking for, an 'undo' search returns nothing close to what I need.
View 7 RepliesI 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?
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