I am trying to rename the title of my application's main window, but when trying so, the name get truncated. I tried to see if it was a conversion problem but I realy can't find why this happen. Try this little program. Hit cancel to see the default application name in the title bar, but if you choose a file, it should display the first line of the file as title but instead truncated it... The trucation is always 3 caracters before the end of the string, and three dots "..." is added.
What am I doing wrong?? or is it a bug with my gtkmm version or something? I use gtkmm-2.4 Thanks in advance.
#include <iostream>
#include <gtkmm.h>
using namespace std;
using namespace Gtk;
using namespace Glib;
class AppWindow : public Window {
public:
AppWindow();
protected:
void onMenuFileOpen();
private:
ustring app_name;
void OpenScript(const ustring sScriptFile);
};
AppWindow::AppWindow() {
app_name = "default app_name, very long name, with !!^spectal caractères à afficher, and there is no name truncation";
//set_title(app_name);
set_default_size(600, 600);
onMenuFileOpen();
}
void AppWindow::onMenuFileOpen() {
FileChooserDialog dialog("Choose a file", FILE_CHOOSER_ACTION_OPEN);
dialog.set_transient_for(*this);
//Add response buttons the the dialog:
dialog.add_button(Stock::CANCEL, RESPONSE_CANCEL);
dialog.add_button(Stock::OPEN, RESPONSE_OK);
//Plain text filter
FileFilter filter_text;
filter_text.set_name("plain text");
filter_text.add_mime_type("text/plain");
dialog.add_filter(filter_text);
//Show the dialog and wait for a user response:
if(dialog.run() == RESPONSE_OK) {
OpenScript(dialog.get_filename());
}
//HERE, I RENAME THE WINDOW
set_title(app_name);
cout << app_name << endl;
}
void AppWindow::OpenScript(const ustring sScriptFile) {
RefPtr<IOChannel> file = IOChannel::create_from_file(sScriptFile,"r");
IOStatus status;
ustring one_line;
if(file->get_flags() & IO_FLAG_IS_READABLE) {
status = file->read_line(one_line);
app_name=one_line;
}
file->close();
}
int main(int argc, char *argv[]) {
Main kit(argc, argv);
AppWindow window;
//Shows the window and returns when it is closed.
Main::run(window);
return 0;
}
Works fine here.
OK I finally found the solution myself. I write it here in case someone else gets the same issue. I don't know if it is a bug or what, but seems like GTK substitutes the three last characters before a '\\n' to '...'. In other words, the string used to rename the window must not contain any '\\n' or else set_title will not show the full name (it will stop three characters before '\\n').
Therefore, In my case, since I used 'getline()', I simply removed the '\\n' from the end of the string.
app_name.erase(app_name.end()-1);
Note that I had to use a 'std::string' instead of a 'Gtk::ustring' since it doesn't handle the 'operator-' on 'end()' function.
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