Keep the charts in State

[batteryviewer] / batteryviewer.c

#include "chart.h"
#include <gtk/gtk.h>

struct State {
  BVChart *voltage;
  BVChart *current;
};

static void activate(GtkApplication *app, gpointer user_data) {

  GtkWidget *window = gtk_application_window_new(app);
  gtk_window_set_title(GTK_WINDOW(window), "BatteryViewer");
  gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

  GtkWidget *box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 1);
  gtk_container_add(GTK_CONTAINER(window), box);

  struct State *state = (struct State *)user_data;
  state->voltage = BV_CHART(bv_chart_new());
  bv_chart_add_point(state->voltage, 0.0, 0.0);
  bv_chart_add_point(state->voltage, 1.0, 1.0);
  bv_chart_add_point(state->voltage, 3.0, 2.0);
  gboolean expand = TRUE;
  gboolean fill = TRUE;
  guint padding = 0;
  gtk_box_pack_start(GTK_BOX(box), GTK_WIDGET(state->voltage), expand, fill,
                     padding);

  state->current = BV_CHART(bv_chart_new());
  bv_chart_add_point(state->current, 0.0, 1.0);
  bv_chart_add_point(state->current, 1.0, 0.0);
  gtk_box_pack_end(GTK_BOX(box), GTK_WIDGET(state->current), expand, fill,
                   padding);

  gtk_widget_show_all(window);
}

int main(int argc, char **argv) {
  struct State state;

  GtkApplication *app = gtk_application_new("com.scottworley.batteryviewer",
                                            G_APPLICATION_DEFAULT_FLAGS);
  g_signal_connect(app, "activate", G_CALLBACK(activate), &state);
  int status = g_application_run(G_APPLICATION(app), argc, argv);
  g_object_unref(app);

  return status;
}