设置GTK +以在MinGW中显示GUI

Question

This is a university assignment to make GUI's in C - I am using windows 7

I have followed several tutorials and nothing seems to work. To give you an idea of what I have done

I have gtk, msys and minGW all installed.

I believe I have all the necessary cygwin packages (is this relevant??)

When I try to compile a C program with gtk stuff included in cygwin just to see if I have installed whatever I needed to I get

$ gcc base.c -o base `gtk-config --cflags --libs`

Sunny@Sunny-Brain ~
$ ./base

Gtk-WARNING **: cannot open display:

I am not sure what this mean. It seems to compile and then fails on running.

I have used https://mail.gnome.org/archives/gtk-list/2008-May/msg00116.html as the method of setting gtk up but it asks me to unzip and untar a pixman file which doesnt work. I downloaded gtk as a bundle and it is in my C: drive eager to make GUI's for me.

In case it helps - I have a pixman-0.26.2 and inside, a pixman-0.26.2.tar.gz - also in my C: drive.

At this point I am willing to try anything.

Answer 1

You seem to have installed the X11 version of GTK using Cygwin. The X11 version of GTK requires an X server to be running in order to use it. The error message is telling you that the environment variable telling GTK which X server to connect to is not set. That probably means that no X server is running.

I recommend that you install the Windows version of GTK (which does not require an X server and also uses a native Windows look and feel by default) and compile using that and MinGW. You shouldn't need to use Cygwin at all.

Answer 2

I found the solution.

I already had cygwin installed. I used mingw and msys because:

1) I am a newb

2) Being a newb I went online, found a few tutorials on setting up GTK and just naively followed them.

If you have cygwin installed already you do not need mingw or msys. But you do need the following:

a) The appropriate cygwin packages installed: When using the cygwin installer, do not use the default install. Either find out what packages you specifically need or install all of them and delete as appropriate if you know what you are doing.

b) In order to display GUI's, there needs to be an environmental path variable for displaying it. Set it using this:

export DISPLAY=:0

then check it using

echo $display

it should echo -

:0

check that you can display a GUI using:

xclock&

If this displays a clock, then you are set to do some GTK tutorials.