Best practice when writing multi window gtkmm application?

Question

Hello
Anyone here who knows gtkmm? I'm in the progress of learning it, and now I'm stuck. I can't really find a good, clean and _working_ way to add more windows.
For example I want to create a "New project" window where the user have to enter some information, and when the user hits "Create" a new main window opens.
Right now I have done it like this:
main.cpp
int main(int argc, char** argv){
//tk_init(&argc, &argv);
Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.control");
NewProject newProject;
return app->run(newProject);
class NewProject : public Gtk::Window{
private:
//Stuff for the "new_project" window
Gtk::Label locationLabel;
Gtk::Entry locationEntry;
Gtk::Label descriptionLabel;
Gtk::Entry descriptionEntry;
Gtk::Button createButton;
Gtk::Grid grid;
void CreateProject();//Callback for createButton
public:
NewProject();
virtual ~NewProject();
NewProject::NewProject()
locationLabel("Location"),
descriptionLabel("Description and notes"),
createButton("Create")
set_title("New Project");
add(grid);
//gtk_grid_set_column_spacing(GTK_GRID(grid), 5);
//gtk_grid_set_row_spacing(GTK_GRID(grid), 5);
grid.add(locationLabel);
grid.add(locationEntry);
grid.attach_next_to(descriptionLabel, locationLabel, Gtk::POS_BOTTOM, 1, 1);
grid.attach_next_to(descriptionEntry, locationEntry, Gtk::POS_BOTTOM, 1, 1);
grid.attach_next_to(createButton, descriptionLabel, Gtk::POS_BOTTOM, 2, 1);
//locationEntry.show();
createButton.signal_clicked().connect(sigc::mem_fun(*this,
&NewProject::CreateProject));
show_all_children();
show();
NewProject::~NewProject(){
void NewProject::CreateProject(){
gProject.location = locationEntry.get_text();
gProject.description = locationEntry.get_text();
//printf(gProject.location.c_str());
//printf(locationEntry.get_text().c_str());
Glib::RefPtr<Gtk::Application> app = get_application();
//std::vector<Window*> windows = app->get_windows();
MainWindow mainWindow;
app->add_window(mainWindow);
//mainWindow.Create(); //Create just calls show() on the window, tried it as a simple double check, didn't work
hide();
And MainWindow is defined like this:
class MainWindow : public Gtk::Window{
private:
Gtk::Button testLabel;
public:
void Create();
MainWindow();
virtual ~MainWindow();
MainWindow::MainWindow(){
printf(gProject.location.c_str());
if(gProject.location.empty()){
printf("EMPTY");
}else{
printf("Notempty");
set_title("asd");
Gtk::Button testButton("TEST");
add(testButton);
testButton.show();
show();
//this->project = project;
//Show the new project window
//Glib::RefPtr<Gtk::Application> app = get_application();
//app->add_window(newProject);
MainWindow::~MainWindow(){
void MainWindow::Create(){
show();
So, why doesn't the window show up? I know the code is executed, because I can see the printf() output in the terminal. Instead of showing the new window, the application just exits "successfully". If I open MainWindow from main, the windows shows up, but opening NewProject from MainWindow doesn't work.
As I said, I'm pretty new to GTK programming, so I am not completely sure about how I should organize the code, so what I've done here might for what I now, be completely wrong, so please guide me in the right direction I will take a look at other gtkmm applications to see how they have done it, but right now I have a very limited network connections, so I will have to wait until I get home in a few days.
Thank you I can post more code if needed, but I don't think there is any more GTK relevant code in the project.
Edit: I kind of solved this case, since I made the NewProject window as a dialoge, so it's fine for now. However, if somebody have a general solution, it would be nice
Last edited by Hakon (2012-06-22 20:53:42)

Answer 1

Hello
Anyone here who knows gtkmm? I'm in the progress of learning it, and now I'm stuck. I can't really find a good, clean and _working_ way to add more windows.
For example I want to create a "New project" window where the user have to enter some information, and when the user hits "Create" a new main window opens.
Right now I have done it like this:
main.cpp
int main(int argc, char** argv){
//tk_init(&argc, &argv);
Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.control");
NewProject newProject;
return app->run(newProject);
class NewProject : public Gtk::Window{
private:
//Stuff for the "new_project" window
Gtk::Label locationLabel;
Gtk::Entry locationEntry;
Gtk::Label descriptionLabel;
Gtk::Entry descriptionEntry;
Gtk::Button createButton;
Gtk::Grid grid;
void CreateProject();//Callback for createButton
public:
NewProject();
virtual ~NewProject();
NewProject::NewProject()
locationLabel("Location"),
descriptionLabel("Description and notes"),
createButton("Create")
set_title("New Project");
add(grid);
//gtk_grid_set_column_spacing(GTK_GRID(grid), 5);
//gtk_grid_set_row_spacing(GTK_GRID(grid), 5);
grid.add(locationLabel);
grid.add(locationEntry);
grid.attach_next_to(descriptionLabel, locationLabel, Gtk::POS_BOTTOM, 1, 1);
grid.attach_next_to(descriptionEntry, locationEntry, Gtk::POS_BOTTOM, 1, 1);
grid.attach_next_to(createButton, descriptionLabel, Gtk::POS_BOTTOM, 2, 1);
//locationEntry.show();
createButton.signal_clicked().connect(sigc::mem_fun(*this,
&NewProject::CreateProject));
show_all_children();
show();
NewProject::~NewProject(){
void NewProject::CreateProject(){
gProject.location = locationEntry.get_text();
gProject.description = locationEntry.get_text();
//printf(gProject.location.c_str());
//printf(locationEntry.get_text().c_str());
Glib::RefPtr<Gtk::Application> app = get_application();
//std::vector<Window*> windows = app->get_windows();
MainWindow mainWindow;
app->add_window(mainWindow);
//mainWindow.Create(); //Create just calls show() on the window, tried it as a simple double check, didn't work
hide();
And MainWindow is defined like this:
class MainWindow : public Gtk::Window{
private:
Gtk::Button testLabel;
public:
void Create();
MainWindow();
virtual ~MainWindow();
MainWindow::MainWindow(){
printf(gProject.location.c_str());
if(gProject.location.empty()){
printf("EMPTY");
}else{
printf("Notempty");
set_title("asd");
Gtk::Button testButton("TEST");
add(testButton);
testButton.show();
show();
//this->project = project;
//Show the new project window
//Glib::RefPtr<Gtk::Application> app = get_application();
//app->add_window(newProject);
MainWindow::~MainWindow(){
void MainWindow::Create(){
show();
So, why doesn't the window show up? I know the code is executed, because I can see the printf() output in the terminal. Instead of showing the new window, the application just exits "successfully". If I open MainWindow from main, the windows shows up, but opening NewProject from MainWindow doesn't work.
As I said, I'm pretty new to GTK programming, so I am not completely sure about how I should organize the code, so what I've done here might for what I now, be completely wrong, so please guide me in the right direction I will take a look at other gtkmm applications to see how they have done it, but right now I have a very limited network connections, so I will have to wait until I get home in a few days.
Thank you I can post more code if needed, but I don't think there is any more GTK relevant code in the project.
Edit: I kind of solved this case, since I made the NewProject window as a dialoge, so it's fine for now. However, if somebody have a general solution, it would be nice
Last edited by Hakon (2012-06-22 20:53:42)