#!/usr/bin/env yash
#
# Demonstration on how to create a GTK GUI using Psalm with YASH.
#
# Supposes the presence of the GNU coreutils 'mkfifo'. Requires Psalm 1.0.8 or higher.
#
# Run as follows:
#   ./demo3.yash
#
# December 4, 2022 by Peter van Eerten.
#------------------------------------------------------------------------------------

# Define the named pipes
IN=/dev/shm/psalm.in
OUT=/dev/shm/psalm.out

# Always delete old named pipes
rm -f ${IN} ${OUT}

# Create the named pipes for communication
mkfifo ${IN} ${OUT}

# Start psalm, redirect input and output to named pipes
./psalm <${IN} >${OUT} &

# Communication function
function comm()
{
    echo "${@}" > ${IN}
    read answer < ${OUT}
}

# Send definitions first
comm "DEF libgtk-3.so.0 void gtk_init int int"
comm "DEF libgtk-3.so.0 long gtk_window_new int"
comm "DEF libgtk-3.so.0 void gtk_window_set_title int char*"
comm "DEF libgtk-3.so.0 void gtk_window_set_position long int"
comm "DEF libgtk-3.so.0 long gtk_button_new_with_label char*"
comm "DEF libgtk-3.so.0 long gtk_table_new int int int"
comm "DEF libgtk-3.so.0 void gtk_container_add long long"
comm "DEF libgtk-3.so.0 long gtk_button_new_with_label char*"
comm "DEF libgtk-3.so.0 long gtk_check_button_new_with_label char*"
comm "DEF libgtk-3.so.0 void gtk_table_attach_defaults long long int int int int"
comm "DEF libgtk-3.so.0 long gtk_entry_new void"
comm "DEF libgtk-3.so.0 char* gtk_entry_get_text long"
comm "DEF libgtk-3.so.0 void gtk_main_iteration void"
comm "DEF libgtk-3.so.0 void gtk_widget_show_all int"
comm "DEF libgtk-3.so.0 void gtk_widget_set_size_request long int int"
comm "DEF libgobject-2.0.so.0 long g_signal_connect_data int char* address void* void* int"

# Design GUI
comm "EXE gtk_init NULL NULL"
comm "EXE gtk_window_new 0"; window=${answer}
comm "EXE gtk_window_set_title ${window} \"This is a title for YASH\""
comm "EXE gtk_window_set_position ${window} 1"
comm "EXE gtk_widget_set_size_request ${window} 300 300"
comm "EXE gtk_table_new 10 10 1"; table=${answer}
comm "EXE gtk_container_add ${window} ${table}"
comm "EXE gtk_button_new_with_label \"Click here\""; button=${answer}
comm "EXE gtk_table_attach_defaults ${table} ${button} 5 9 7 9"
comm "EXE gtk_check_button_new_with_label \"Check this out!\""; check=${answer}
comm "EXE gtk_table_attach_defaults ${table} ${check} 1 6 1 2"
comm "EXE gtk_entry_new"; entry=${answer}
comm "EXE gtk_table_attach_defaults ${table} ${entry} 1 6 3 4"
comm "EXE gtk_widget_show_all ${window}"

# Connect signals
comm "EXE g_signal_connect_data ${window} delete-event callback NULL NULL 0"
comm "EXE g_signal_connect_data ${button} clicked callback NULL NULL 0"
comm "EXE g_signal_connect_data ${entry} activate callback NULL NULL 0"

# Mainloop
while [[ ${event} != ${button} && ${event} != ${window} ]]
do
    comm "EXE gtk_main_iteration"
    comm "CALLBACK 1"; event=${answer}

    if [[ ${event} == ${entry} ]]
    then
        comm "EXE gtk_entry_get_text ${entry}"
        echo "${answer}" >&2
    fi
done

comm "EXIT"

# Cleanup
rm ${IN} ${OUT}

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