Waybar/resources/custom_modules/cffi_example/main.c

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C
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#include "waybar_cffi_module.h"
typedef struct {
GtkContainer* root;
GtkBox* container;
GtkButton* button;
} Instance;
// This static variable is shared between all instances of this module
static int instance_count = 0;
void onclicked(GtkButton* button) {
char text[256];
snprintf(text, 256, "Dice throw result: %d", rand() % 6 + 1);
gtk_button_set_label(button, text);
}
// You must
const size_t wbcffi_version = 1;
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void* wbcffi_init(GtkContainer* root_widget, void (*trigger_update)(void*),
void* trigger_update_arg, const struct wbcffi_config_entry* config_entries,
size_t config_entries_len) {
printf("cffi_example: init config:\n");
for (size_t i = 0; i < config_entries_len; i++) {
printf(" %s = %s\n", config_entries[i].key, config_entries[i].value);
}
// Allocate the instance object
Instance* inst = malloc(sizeof(Instance));
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inst->root = root_widget;
// Add a container for displaying the next widgets
inst->container = GTK_BOX(gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 5));
gtk_container_add(GTK_CONTAINER(inst->root), GTK_WIDGET(inst->container));
// Add a label
GtkLabel* label = GTK_LABEL(gtk_label_new("[Example C FFI Module:"));
gtk_container_add(GTK_CONTAINER(inst->container), GTK_WIDGET(label));
// Add a button
inst->button = GTK_BUTTON(gtk_button_new_with_label("click me !"));
g_signal_connect(inst->button, "clicked", G_CALLBACK(onclicked), NULL);
gtk_container_add(GTK_CONTAINER(inst->container), GTK_WIDGET(inst->button));
// Add a label
label = GTK_LABEL(gtk_label_new("]"));
gtk_container_add(GTK_CONTAINER(inst->container), GTK_WIDGET(label));
// Return instance object
printf("cffi_example inst=%p: init success ! (%d total instances)\n", inst, ++instance_count);
return inst;
}
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void wbcffi_deinit(void* instance) {
printf("cffi_example inst=%p: free memory\n", instance);
free(instance);
}
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void wbcffi_update(void* instance) { printf("cffi_example inst=%p: Update request\n", instance); }
void wbcffi_refresh(void* instance, int signal) {
printf("cffi_example inst=%p: Received refresh signal %d\n", instance, signal);
}
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void wbcffi_doaction(void* instance, const char* name) {
printf("cffi_example inst=%p: doAction(%s)\n", instance, name);
}