graph buttons

gui_graph_tab.c

@@ -43,8 +43,18 @@ static GdkColor colors[] = {
 	{ .red = 0x8000, .green = 0x8000, .blue = 0x8000, },
 };
 
+#define MOD_CONTINUOUS 		0x0001
+#define MOD_SINGLESHOT		0x0002
+#define MOD_RUNNING		0x0004
+#define MOD_STOPPED		0x0008
+
+static int graph_mode = MOD_CONTINUOUS | MOD_RUNNING;
+static struct timeval base;
+
 static GtkWidget *box;
 static GtkWidget *legend;
+static GtkWidget *yscale_min, *yscale_max;
+static GtkWidget *start_button, *mode_button;
 
 static GList *graphlist;
 
@@ -105,9 +115,85 @@ static void update_legend(void)
 	g_string_free(tmp, TRUE);
 }
 
+static void rescale_graphs(gboolean reset)
+{
+	static GtkDataboxValue min;
+	static GtkDataboxValue max;
+
+	GtkDataboxValue tmp_min, tmp_max;
+
+	if (gtk_databox_calculate_extrema(GTK_DATABOX(box), &tmp_min, &tmp_max) < 0)
+		return;
+
+	/* swap y: min/max (high values -> higher on screen) */
+	if (!reset) {
+		min.x = MIN(min.x, tmp_min.x);
+		max.x = MAX(max.x, tmp_max.x);
+		min.y = MAX(min.y, tmp_max.y);
+		max.y = MIN(max.y, tmp_min.y);
+
+	} else {
+		min.x = tmp_min.x;
+		max.x = tmp_max.x;
+		min.y = tmp_max.y;
+		max.y = tmp_min.y;
+	}
+
+	char tmp[64];
+	snprintf(tmp, sizeof(tmp), "y-Min: %0.0lf", max.y);
+	gtk_label_set_text(GTK_LABEL(yscale_min), tmp);
+
+	snprintf(tmp, sizeof(tmp), "y-Max: %0.0lf", min.y);
+	gtk_label_set_text(GTK_LABEL(yscale_max), tmp);
+
+	gtk_databox_set_canvas(GTK_DATABOX(box), min, max);
+}
+
+static void rescale_button_cb(GtkWidget *widget, gpointer data)
+{
+	rescale_graphs(TRUE);
+}
+
+static void update_button_labels(void)
+{
+	if (graph_mode & MOD_SINGLESHOT)
+		gtk_button_set_label(GTK_BUTTON(mode_button), "Single Shot");
+	else if (graph_mode & MOD_CONTINUOUS)
+		gtk_button_set_label(GTK_BUTTON(mode_button), "Continuous");
+
+	if (graph_mode & MOD_RUNNING)
+		gtk_button_set_label(GTK_BUTTON(start_button),  "Halt");
+	else if (graph_mode & MOD_STOPPED)
+		gtk_button_set_label(GTK_BUTTON(start_button),  "Start");
+}
+
+static void mode_button_cb(GtkWidget *widget, gpointer data)
+{
+	if (graph_mode & MOD_SINGLESHOT)
+		graph_mode = (graph_mode & ~MOD_SINGLESHOT) | MOD_CONTINUOUS;
+
+	else if (graph_mode & MOD_CONTINUOUS)
+		graph_mode = (graph_mode & ~MOD_CONTINUOUS) | MOD_SINGLESHOT;
+
+	update_button_labels();
+}
+
+static void start_button_cb(GtkWidget *widget, gpointer data)
+{
+	if (graph_mode & MOD_STOPPED) {
+		graph_mode = (graph_mode & ~MOD_STOPPED) | MOD_RUNNING;
+		gettimeofday(&base, NULL);
+
+	} else if (graph_mode & MOD_RUNNING) {
+		graph_mode = (graph_mode & ~MOD_RUNNING) | MOD_STOPPED;
+	}
+
+	update_button_labels();
+}
+
 gint gui_graphtab_init(GtkNotebook *notebook)
 {
-	GtkWidget *table = gtk_table_new(5, 4, FALSE);
+	GtkWidget *table = gtk_table_new(5, 6, FALSE);
 	box = gtk_databox_new();
 
 	gtk_table_attach(GTK_TABLE(table), box, 1, 4, 1, 2,
@@ -141,13 +227,27 @@ gint gui_graphtab_init(GtkNotebook *notebook)
 	gtk_databox_graph_add(GTK_DATABOX(box), grid);
 
 	legend = gtk_label_new(NULL);
-	gtk_table_attach(GTK_TABLE(table), legend, 1, 2, 3, 4, 0, 0, 10, 10);
+	gtk_table_attach(GTK_TABLE(table), legend, 1, 2, 3, 6, 0, 0, 5, 5);
+
+	yscale_max = gtk_label_new("y-Max:");
+	gtk_table_attach(GTK_TABLE(table), yscale_max, 2, 3, 3, 4, 0, 0, 5, 5);
+
+	yscale_min = gtk_label_new("y-Min:");
+	gtk_table_attach(GTK_TABLE(table), yscale_min, 2, 3, 4, 5, 0, 0, 5, 5);
+
+	GtkWidget *rescale_button = gtk_button_new_with_label("Autoscale");
+	gtk_table_attach(GTK_TABLE(table), rescale_button, 2, 3, 5, 6, 0, 0, 10, 10);
+	g_signal_connect(G_OBJECT(rescale_button), "clicked", G_CALLBACK(rescale_button_cb), NULL);
 
-	GtkWidget *button2 = gtk_button_new_with_label("Mode");
-	gtk_table_attach(GTK_TABLE(table), button2, 2, 3, 3, 4, 0, 0, 10, 10);
+	start_button = gtk_button_new_with_label("Start");
+	gtk_table_attach(GTK_TABLE(table), start_button, 3, 4, 4, 5, 0, 0, 10, 10);
+	g_signal_connect(G_OBJECT(start_button), "clicked", G_CALLBACK(start_button_cb), NULL);
 
-	GtkWidget *button3 = gtk_button_new_with_label("Stopp");
-	gtk_table_attach(GTK_TABLE(table), button3, 3, 4, 3, 4, 0, 0, 10, 10);
+	mode_button = gtk_button_new_with_label("Continuous");
+	gtk_table_attach(GTK_TABLE(table), mode_button, 3, 4, 5, 6, 0, 0, 10, 10);
+	g_signal_connect(G_OBJECT(mode_button), "clicked", G_CALLBACK(mode_button_cb), NULL);
+
+	update_button_labels();
 
 	GtkWidget *label = gtk_label_new(" Graph ");
 	return gtk_notebook_append_page(GTK_NOTEBOOK(notebook), table, label);
@@ -206,42 +306,15 @@ static int calc_index(struct timeval *base, struct timeval *now, int step)
 	return diff.tv_usec / step;
 }
 
-static void rescale_graphs(gboolean reset)
-{
-	static GtkDataboxValue min;
-	static GtkDataboxValue max;
-
-	GtkDataboxValue tmp_min, tmp_max;
-
-	if (gtk_databox_calculate_extrema(GTK_DATABOX(box), &tmp_min, &tmp_max) < 0)
-		return;
-
-	float swap = tmp_min.y;
-	tmp_min.y = tmp_max.y;
-	tmp_max.y = swap;
-
-	if (!reset) {
-		min.x = MIN(min.x, tmp_min.x);
-		min.y = MAX(min.y, tmp_min.y);
-		max.x = MAX(max.x, tmp_max.x);
-		max.y = MIN(max.y, tmp_max.y);
-
-	} else {
-		min.x = tmp_min.x;
-		min.y = tmp_min.y;
-		max.x = tmp_max.x;
-		max.y = tmp_max.y;
-	}
-
-	gtk_databox_set_canvas(GTK_DATABOX(box), min, max);
-}
-
 void gui_graphtab_update_var(struct tdc_var *var)
 {
-	static struct timeval base, update;
+	static struct timeval update;
 
 	struct xygraph *graph = (struct xygraph *)var->privdata_graphtab;
 
+	if (graph_mode & MOD_STOPPED)
+		return;
+
 	struct timeval now;
 	gettimeofday(&now, NULL);
 
@@ -250,6 +323,11 @@ void gui_graphtab_update_var(struct tdc_var *var)
 		base.tv_sec = now.tv_sec;
 		base.tv_usec = now.tv_usec;
 		i = 0;
+
+		if (graph_mode & MOD_SINGLESHOT) {
+			graph_mode = (graph_mode & ~MOD_RUNNING) | MOD_STOPPED;
+			update_button_labels();
+		}
 	}
 
 	float last_value = graph->yarr[graph->last_index];

tdc_store.c

@@ -57,7 +57,12 @@ static int tdcstore_destroy_var(struct tdc_board *board, int id)
 	if (var == NULL)
 		return -1;
 
-	gui_vartab_remove_var(var);
+	if (var->privdata_vartab)
+		gui_vartab_remove_var(var);
+
+	if (var->privdata_graphtab)
+		gui_graphtab_remove_var(var);
+
 	tdcvar_destroy(var);
 
 	board->varmap[id & 0xFF] = NULL;