I'm trying to implement a custom widget in wxWidgets (version 2.8.12), essentially a modified single line wxTextCtrl. It takes a text input that consists of two sets of 8-digit hexadecimal numbers separated by a space, and I want the control to automatically handle that space. For example, if the user types 1-8 in twice (no press of the space bar required), the resulting contents of the text control should be:
12345678 12345678
If the user were to then place their cursor after the first '3' and backspace three times, that space should automatically adjust as they edit, resulting in:
45678123 45678
Essentially, the space should be completely transparent to the user.
I have this, for the most part, done. The code is a bit long to paste here, so here is a Gist:
https://gist.github.com/036c1a90f77521a8653c
There is one bug, however, that I can't seem to fix- upon typing the ninth digit, it automatically inserts the space, but the cursor ends up right after the space, right behind the ninth digit.
All attempts to use wxTextCtrl::SetInsertionPoint() and wxTextCtrl::SetInsertionPointEnd() have shown no success, so I've come here as a last resort in hopes that somebody can point out what I'm doing wrong.
To assist in testing this widget out, I've prepared a very quick and dirty application containing the widget:
https://gist.github.com/cf3219eb47e2bfe85b38
Or click here to download the code as a tarball:
https://gist.github.com/gists/cf3219eb47e2bfe85b38/download
Just run make to clean, compile, and run the code all at once. You'll need wxWidgets 2.8.12 installed to compile, of course.
Mostly every other facet of this widget works exactly as I want it to- it is just this one very large problem that is keeping this from working. There is, however, one tiny bug that I'm curious about, and though it isn't a major concern I'd like to fix it some time.
The space will be automatically handled even upon deleting characters, even if you delete a selection- however, if the selection that you delete ends on the ninth digit, it won't reformat the contents of the control after the deletion.
If anybody can pinpoint the cause of that it would be appreciated, but the insertion point problem is obviously my main concern.
Thanks to anybody willing to help, I tried to provide as much information and explanation as possible- if I missed anything, please let me know.
Generally speaking, it's difficult to modify the input handling of a native control as it behaves differently under different platforms. I don't know if you tested your code under all (or at least more than one) of them already but I fully expect you to find more problems.
Instead of trying to do it on your own, I'd recommend that you look at wxMaskedEdit proposed for the addition to wxWidgets itself. It's not final yet but there is a preliminary version already and I think it could work with 2.8 too (although it's developed with 2.9, of course).
Related
First of all, I need this just for a program than runs in console only.
So, I need a specific text to always be displayed in the console, in the same place, no matter how much other text appears below it. It can't "go up", it has to be shown always.
I don't know if there's actually a way/command, to do that. So I figured I could just clear the console (clear the screen) and show it, repeating this multiple times. But I've read in several similar questions that doing so is not actually safe or the correct way to go, and I can't find an actual answer on why it isn't safe.
So I was wondering, first why clearing the console is not safe?
And most importantly how should I approach this?
Sorry if it's not well written, I'm a little rusty with my English.
If running it in windows compiler only.
I am planning to make a console game in C++, kind of like Dwarf Fortress (although I don't know if it was coded in C++), but I have encountered a big problem.
I want to display different things in different colours on the screen at once. I also need to change something that has already been printed (so that I don't have to re-print everything and make the screen flash annoyingly, especially that I will want to make changes every second or so) and I found a way to do that with WriteConsoleOutput() and although I don't know yet exactly how to use it, I'll be reading into it soon.
As for the colours, I found a post here about some ANSI Escape things, but it
a) doesn't work, even when copying the linked code from github
b) I don't know if it'll work with attempts to over-write the console in specific places with WriteConsoleOutput()
So my request is: could someone please ELI5 to me what am I supposed to do and why, as well as present with a viable solution to this combination of two problems so that I can replicate something like this, with the possibilty of changing what the characters show.
Thanks in advance!
We're using MFC data exchange to validate some data and we're having some problems. We're using the DDV_MinMaxFloat call to ensure that edit boxes in various parts of the application contain floating point numbers within a specified range. When using this validation if a value is entered out of range a dialog is automatically displayed to the user indicating that the value must lie within the range specified. This has been working correctly whilst running the application in debug however when building a release we are getting problems. The validation is still performed in release mode however the message box displayed to the user is blank.
I've tried the usual forcing a rebuild, deleting old resource files and deleting precompiled header files but this continues to happen in release mode. Has anyone come across this before? Are there any obvious things to look for?
I should also add that this application is over 10 years old, so obviously has been working correctly before. Somehow something has gone wrong in the last few weeks to cause this.
Those messages will come from MFC's resource strings. There might be some conflict with your own resources. Check to make sure your resources adhere to Microsoft's guidelines TN020: ID Naming and Numbering Conventions.
Pay particular attention to this bit:
MFC's internal framework implementations reserve two ranges: 0x7000
through 0x7FFF and 0xE000 through 0xEFFF.
Somehow something has gone wrong in the last few weeks to cause this.
Since your application worked fine a few weeks ago, it should be easy: check out the last working version from your revision control system and compare it with the current version. Or try to narrow it down to the first revision which does not work any more.
Check with Spy++ if there are controls on the message box that is displayed and if the text on them is blank, or if there's no controls on them at all. If the text is empty, you'll have to check the resources or the way the messagebox is called/created. Otherwise it may be something like resource being set incorrectly and the message assuming it can read its resource strings from ::AfxGetResourceHandle(). Note that this is a very easy error to make - it's a global handle that can be changed everywhere (including in dll's that you have no control over) so changes in remote parts of the code that at first sight seem unrelated may trigger it.
I am writing a windows program (no mfc) and need to output a status line to the operator every few seconds or so. I tried using rich text boxes but after so many hours it seems to hang up. Does anybody have an suggestions on what I can use instead?
People mentioned that my buffers might have been exhausted. I thought I had planned for that. After I had about 1000 lines displayed I would take the first 500 and remove them using the select and cut options in rich text boxes. I still ran into the same problem.
This question appears relevant, and this one too. But they don't give any concrete recommendations for an alternative to rich text boxes.
You might try the Scintilla control (scintilla.org) which does not appear to have any hard limitations on text size. It has a permissive license. It is used by many text editors such as Notepad++, Notepad2, Code::Blocks, FlashDevelop. I haven't tried it personally but there from the documentation it looks easy to use it in a Windows API application. Of course, it might be overkill for your purposes.
If you keep appending to the text in the control every few seconds for hours then you are probably running into some memory constraint on the control or the process. I think you would have this problem with any control you choose given update frequence and how long you're running the program.
Have you considered implementing a simple circular buffer for the content of the text box? Say only keep the last hour's messages. You could maintain a separate log file for history if the operator needed to go back in time for hours.
I ended up writing my own control to do this, essentially duplicating the Output window in Visual Studio. It was a success, but it ended up being much more code than I thought it would be when I started - I insisted on features such as auto-scrolling when the cursor was on the last line, select/copy, bold text, etc. It was backed by a std::deque so I could limit the number of lines stored for the window.
Unfortunately the code belongs to a former employer so I can't share it here.
how do we rename .xaml and .cs files?
would like to be able to keep development in synch with the original sketchflow. i.e. sketchflow has features such as the ability to collect client feedback on a per screen basis, etc.
... I kind of answered my own question here, so I'll post it as a follow up. Asked the original question 9 hours ago on the MS site without response... still trying to work out where the best place is to talk to the community, so sorry for the duplicate.
THE ANSWER (IS THERE A BETTER ONE?)
Context: Sketchflow is a prototyping tool. In large teams possibly you want to keep the prototype seperate from the finished version, or there's a large prototyping phase.
My view is that I really like Sketchflow. It's one of the coolest things I've seen for a while (well done Microsoft).
... so for me, I want the prototype to become a the finished product. I want the designers to step in and make transitions whenever they want. I want the designers to kick the process off, and the developers to put in the detail. I'd like our customers to be able to post feedback at any time during the build process. btw: get your developers to check out MVVM. It's very cool.
My bet is that the feedback could get lost if you make a breaking change (a file rename) -- so just beware of that. That wont be a problem for us. We'll get our file names to make sense and then mostly leave it alone. Of course MS could fix this this by creating a globally unique id (Guid) for each screen that is created. Perhaps they've done this already. If someone from MS reads this, please put this on your requested features list.
THE ANSWER:
So here is the answer that works for me:
don't try to hand-edit the xaml / cs, as all the cross referencing that you might be doing with behaviors will break if you aren't really careful. Typical files that need to be modified: .csproj, Sketch.Flow, xxxx.xaml, and xxxx.cs.
To auto do it, download a tool like Ultraedit. Alternatively, you might be able to just use VS 2010 (untested).
Steps with ultraedit:
(BACKUP YOUR PROJECT FIRST)
Search/Replace In Files...
Find in files... "Screen_1_19"
Replace with... "Welcome"
In Files/Types... "."
Directory...
Match Whole Word Only
Hit "Start"
follow the prompts
rename the files (.xaml & .cs) to be Welcome.???? (where ???? is .xaml or .cs) . Since I use SVN, this step gets done for me in one step (no big deal).
If using VS2010 for steps 1 through 8, be careful do longer string replacements first e.g. Screen_1_19 before Screen_1. I think VS treats _ as a word break. On ultraedit you'll be fine.
If there's interest, in the spare time that I don't currently have, I could release a quick tool to do this on codeplex.
** note: because we are working with XML and XML is very particular about being correct, I close expression blend down, and then reopen it again after the replace/rename to see if I was successful + my screen map still has all the flow lines still drawn in.
answer is above in the body of the question.