Programming Forums > Application Development > C++

rwm · Sep 3rd, 2007, 10:45 AM

Hey!

Well, i've decided the best way to learn wxWidgets is to write a test application. So i've decided to write a console app... Not quite sure what i'm gonna do next, but this is how far i've gotten:

Might add functionality so the user can type commands in and get something out... I don't know?

Any suggestions as to what I should put in? Make my life hard!

I probably wont keep this up for long, but who knows!

Good practice!!!

Game_Ender · Sep 3rd, 2007, 8:08 PM

What do you mean by "console app", do you mean you wish to make a Terminal Emulator? I have thought about making one, but I have never been able to figure out/find all the documentation for terminal control codes.

Here is a goal for you:
* Be able to start and talk to a simple C/C++ application that takes input from stdin and prints stuff to stdout.
* Be able to run a curses based application

Game_Ender · Sep 3rd, 2007, 8:09 PM

Basically copy Terminal.app or Gnome Terminal but be cross platform with wxWidgets.

DaWei · Sep 3rd, 2007, 8:33 PM

Terminal codes used to vary widely, though there were a number of standard ones. Once terminals were built to respond to escape sequences, things became much more standardized. If you can find the information behind the old ANSI.SYS, you'll probably be in tall cotton.

Otherwise, building a shell isn't really that difficult. You can build in some commands and handle others by launching appropriate executables.

Giving it the ability to pipe will be dependent upon the underlying OS, though, generally.

rwm · Sep 4th, 2007, 3:22 AM

Thanks guys! Will start working on this! Be slow going since i'm doing R&D for a feature film at the moment! Gonna be a giant pain in the ass!

Will post as soon as I have something more to show!

lectricpharaoh · Sep 4th, 2007, 6:00 AM

@Game_Ender: To expand on DaWei's post, if you're looking for ANSI escape sequences, google for NNANSI. It's an old DOS replacement for ANSI.SYS, and included in the documentation is a list of codes. If you can't find it, I have the list kicking around somewhere, I believe.

I also might have a list of VT52 codes as well, but no guarantees there.

rwm · Sep 4th, 2007, 6:36 AM

Coolio!

Just been looking at it, it's gonna be hard since i have no experience with widgets... Need to read up event stuff etc

But the sample apps included are helpful!

rwm · Sep 4th, 2007, 9:44 AM

Well, been dicking around with wxKeyEvent and wxTextCtrl...

So far just doing simple tests, got a rudimentary "expression" evaluator up and running, its just plain silly, but just testing you know!

It works something like:

(Toggle Plain Text)

void MainFrame::OnKey(wxKeyEvent &event)
{
    char ch = event.GetKeyCode();
    switch(ch)
    {
        case WXK_RETURN:
        {
            command.Eval();
            textCtrl->Append("\n"); //move to newline
            return;
        }
    }
    //append the char input to command and textCtrl
    command.Append(ch);
    textCtrl->Append(ch);
}

Where command is a class type Command, which reads in a command string "expression string" and parses it on request (Command::Eval()) - which then performs the appropriate action...

But it works at least!

So, I'm now trying to figure out how to get the prompt line, still trying to find out how to start std input into the textCtrl...

Anyways, back to this! I've already learnt quite a bit about wxWidgets thus far!

Sep 3rd, 2007, 10:45 AM	#1
rwm Professional Programmer Join Date: Jan 2007 Location: Cape Town Posts: 291 Rep Power: 2	console app with wxWidgets Hey! Well, i've decided the best way to learn wxWidgets is to write a test application. So i've decided to write a console app... Not quite sure what i'm gonna do next, but this is how far i've gotten: Might add functionality so the user can type commands in and get something out... I don't know? Any suggestions as to what I should put in? Make my life hard! I probably wont keep this up for long, but who knows! Good practice!!!

Sep 3rd, 2007, 8:08 PM	#2
Game_Ender Professional Programmer Join Date: May 2006 Location: Maryland, USA Posts: 306 Rep Power: 3	What do you mean by "console app", do you mean you wish to make a Terminal Emulator? I have thought about making one, but I have never been able to figure out/find all the documentation for terminal control codes. Here is a goal for you: * Be able to start and talk to a simple C/C++ application that takes input from stdin and prints stuff to stdout. * Be able to run a curses based application __________________ Robotics @ Maryland AUV Team - Software Lead

Sep 3rd, 2007, 8:09 PM	#3
Game_Ender Professional Programmer Join Date: May 2006 Location: Maryland, USA Posts: 306 Rep Power: 3	Basically copy Terminal.app or Gnome Terminal but be cross platform with wxWidgets. __________________ Robotics @ Maryland AUV Team - Software Lead

Sep 3rd, 2007, 8:33 PM	#4
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Terminal codes used to vary widely, though there were a number of standard ones. Once terminals were built to respond to escape sequences, things became much more standardized. If you can find the information behind the old ANSI.SYS, you'll probably be in tall cotton. Otherwise, building a shell isn't really that difficult. You can build in some commands and handle others by launching appropriate executables. Giving it the ability to pipe will be dependent upon the underlying OS, though, generally. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Sep 4th, 2007, 6:00 AM	#6
lectricpharaoh Caffeinated Neural Net Join Date: Jun 2005 Location: Dry west coast of Canada Posts: 929 Rep Power: 4	@Game_Ender: To expand on DaWei's post, if you're looking for ANSI escape sequences, google for NNANSI. It's an old DOS replacement for ANSI.SYS, and included in the documentation is a list of codes. If you can't find it, I have the list kicking around somewhere, I believe. I also might have a list of VT52 codes as well, but no guarantees there. __________________ A man's knowledge is like an expanding sphere, the surface corresponding to the boundary between the known and the unknown. As the sphere grows, so does its surface; the more a man learns, the more he realizes how much he does not know. Hence, the most ignorant man thinks he knows it all. - L. Sprague de Camp

Sep 4th, 2007, 3:22 AM	#5
rwm Professional Programmer Join Date: Jan 2007 Location: Cape Town Posts: 291 Rep Power: 2	Thanks guys! Will start working on this! Be slow going since i'm doing R&D for a feature film at the moment! Gonna be a giant pain in the ass! Will post as soon as I have something more to show!

Sep 4th, 2007, 6:36 AM	#7
rwm Professional Programmer Join Date: Jan 2007 Location: Cape Town Posts: 291 Rep Power: 2	Coolio! Just been looking at it, it's gonna be hard since i have no experience with widgets... Need to read up event stuff etc But the sample apps included are helpful!

Sep 4th, 2007, 9:44 AM	#8
rwm Professional Programmer Join Date: Jan 2007 Location: Cape Town Posts: 291 Rep Power: 2	Well, been dicking around with wxKeyEvent and wxTextCtrl... So far just doing simple tests, got a rudimentary "expression" evaluator up and running, its just plain silly, but just testing you know! It works something like: (Toggle Plain Text) void MainFrame::OnKey(wxKeyEvent &event) { char ch = event.GetKeyCode(); switch(ch) { case WXK_RETURN: { command.Eval(); textCtrl->Append("\n"); //move to newline return; } } //append the char input to command and textCtrl command.Append(ch); textCtrl->Append(ch); } void MainFrame::OnKey(wxKeyEvent &event) { char ch = event.GetKeyCode(); switch(ch) { case WXK_RETURN: { command.Eval(); textCtrl->Append("\n"); //move to newline return; } } //append the char input to command and textCtrl command.Append(ch); textCtrl->Append(ch); } Where command is a class type Command, which reads in a command string "expression string" and parses it on request (Command::Eval()) - which then performs the appropriate action... But it works at least! So, I'm now trying to figure out how to get the prompt line, still trying to find out how to start std input into the textCtrl... Anyways, back to this! I've already learnt quite a bit about wxWidgets thus far!

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Programming Forums > Application Development > C++

console app with wxWidgets