Connecting signals to widgets/windows
- From: "Bart Van den Bosch" <bvdb skynet be>
- To: <gtk-list gnome org>
- Subject: Connecting signals to widgets/windows
- Date: Sun, 4 Nov 2001 13:39:50 +0100
Hello,
I am writing a small C++ app, to be used as a informational counter
at a sporting event. It forks itself a few times, and 1 of the
processes will become the input window, and another will become
the display window. The display window takes its info from the
input window, through a pipe (which works fine). The only problem
is that the input window can also take an 'enter' key to signal to
the input window that a new runner has started.
I have a class OutputWindow (and a class InputWindow) to which a
signal is connected, starting a function external to the class,
which in its turn starts a function of the class itself. The problem
now is, that apparently the process locks up (and the display window
disappears) when the first function using the class's object-specific
variables gets called in response to the signal. Any cout called
before that first call (such as a message to console that the key
was pressed) work, both in the external function as in the class itself.
Anyone have a solution to this problem?
I am not that proficient in C/C++, so I do have a couple of questions:
Is there a way of connecting the signal directly to a function internal
to the class (can I connect OutputWindow::keyEnterPressed(...) directly?)
Short outline:
OutputWindow *__display;
void keyEnterPressedWrapper(...){
__display->keyEnterPressed(...);
}
void OutputWindow::keyEnterPressed(...){
//do the stuff.
}
GtkWidget *createOutputWindow(){
//do everything that is needed to create and show the window,
gtk_signal_connect(/*all the needed data*/)
}
In the inputwindow this strategy works fine (I did not write that myself...
just expanding it), the only difference is that there the variable is called
"__window".
Thanks!
Bart Van den Bosch
bvdb skynet be
bart vandenbosch student kuleuven ac be
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