Re: How to update both the Console and the GTKMM gui window after running other functions

[Ian Martin <martin_id vodafone co nz>]

Hi,
Have you looked at the code for the progress bar example?
https://developer.gnome.org/gtkmm-tutorial/stable/sec-progressbar.html.en

Ian.

On 31/07/13 09:33, L. D. James wrote:
> On 07/30/2013 04:53 PM, Moh B. wrote:
> > //main.cpp:
> > //-----------
> > // Look at this modified code and pay attention to the order of
> > execution and call th the functions
> > #include <gtkmm.h>
> > #include <iostream>
> >
> > using namespace std;
> >
> > int main(int argc, char* argv[])
> > {
> >          Gtk::Main kit(argc, argv);
> >
> >          Gtk::Window window;
> >          Gtk::TextView textview;
> >          Gtk::Label label;
> >
> >    string mylabeltext = "This is the first line of text in my gui
> > window.\n";
> >
> >          window.set_default_size(600, 360);
> >          window.set_title("Gtkmm Programming - C++");
> >          window.set_position(Gtk::WIN_POS_CENTER);
> >
> >          label.show();
> >          window.add(label);
> >
> >          label.set_text(mylabeltext);
> >
> >          mylabeltext += "About to run some routines...\n";
> >
> >          label.set_text(mylabeltext);
> >
> >          cout << "An initial line has been set to the gui window." <<
> > endl;
> >          // The Gui Window is displayed
> >    //==> YOURS      Gtk::Main::run(window);
> >    // Now my main program has performed some functions and wants to
> > update
> >          // the console and the gui window.
> >      cout << "Continuing after various functions and processing..." <<
> > endl;
> >           //A MODIFICATION HERE '+=' instead of yours '=''
> >          mylabeltext += "Showing the results of the functions and
> > processing.";
> >          label.set_text(mylabeltext);
> >   // AND NOW
> >     Gtk::Main::run(window);
> >          return 0;
> > }
> > //----------------------------------------------
> > //code end
> >
> > /////////////// Makefile ///////////////////
> > #Begin of Makefile
> > all:
> >
> >     @echo " "
> >     @echo " 1- Compiling..."
> >     g++ -Wall -g -c *.cpp `pkg-config gtkmm-3.0 --cflags`
> >
> >     @echo " "
> >     @echo " 2- Linking..."
> >     g++ -Wall -g *.o `pkg-config gtkmm-3.0 --libs` -o
> > Gtkmm34-popup-menu-test
> >
> >     @echo " "
> >     @echo " DONE!!!";
> > #    @echo " "
> >     chmod +x Gtkmm34-popup-menu-test
> >     ls . -all
> >
> > clean:
> >     rm *.o Gtkmm34-popup-menu-test
> >
> > /////////////// Makefile ///////////////////
> > #End of Makefile
>
> How are you doing, Moh B.
>
> I believe you misunderstood my problem.  I can output all the text out 
> to the gui window without problems.  However, what I'm trying to do is 
> output the text after an operation has taken place.  I should have put 
> sleep() functions to represent some operation taking place.  I want to 
> give the user a status of what is taking place between operations.
>
> I updated the code to better represent this.
>
> At present I see the output at each stage on the console. However, the 
> gui window isn't updated.  It doesn't show anything until after all 
> the functions have completed (in this case sleep() functions.
>
> In the actually program some of the functions will take a few minutes 
> and some of them might take over an hour.  I don't want the user to be 
> left with a no status update for the entire time, or between operations.
>
> Notice how the console is output immediately.  Then a sleep function.  
> Then the status is updated again informing the user how long the 
> function took.  Then another function (in this case a sleep() function.
>
> //code begin:
> //main.cpp:
> //-----------
> // Look at this modified code and pay attention to the order of 
> execution and call th the functions
> #include <gtkmm.h>
> #include <iostream>
>
> using namespace std;
>
> int main(int argc, char* argv[])
> {
>     Gtk::Main kit(argc, argv);
>
>     Gtk::Window window;
>     Gtk::TextView textview;
>     Gtk::Label label;
>
>     string mylabeltext = "This is the first line of text in my 
> guiwindow.\n";
>
>     window.set_default_size(600, 360);
>     window.set_title("Gtkmm Programming - C++");
>     window.set_position(Gtk::WIN_POS_CENTER);
>
>     label.show();
>     window.add(label);
>
>     label.set_text(mylabeltext);
>
>     mylabeltext += "About to run some routines...\n";
>
>     label.set_text(mylabeltext);
>
>     cout << "An initial line has been set to the gui window." << endl;
>
>     sleep(60); // This is the estimated time for a function to run. 
> Some of them takes an hour.
>     mylabeltext += "Continuing after the first fundtion that took 60 
> seconds\n";
>     cout << "Continuing after various functions and processing..." << 
> endl;
>     label.set_text(mylabeltext);
>
>     sleep(60);  // This represents another stage of processes and 
> operations.  I'm attempting to update
>     // the status to the user.
>     //A MODIFICATION HERE '+=' instead of yours '=''
>     mylabeltext += "Other events are taking place that has taken 
> another 60 seconds\n";
>     cout << "Other events have taken place" << endl;
>     label.set_text(mylabeltext);
>     // AND NOW
>     Gtk::Main::run(window);
>     return 0;
> }
> //----------------------------------------------
> //code end
>
> -- L. James