From: Michael Tremer <michael.tremer@ipfire.org>
Date: Thu, 19 Sep 2024 14:52:49 +0000 (+0000)
Subject: tui: Add a grid to the graph
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=4e997dd74fcadf821b3fcf77648dedcb9405f220;p=fireperf.git

tui: Add a grid to the graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/tui.c b/src/tui.c
index 0e6433b..956de21 100644
--- a/src/tui.c
+++ b/src/tui.c
@@ -29,6 +29,7 @@
 #include "ctx.h"
 #include "stats.h"
 #include "tui.h"
+#include "util.h"
 
 #define MAX_STATS 1024
 
@@ -137,6 +138,7 @@ static int fireperf_tui_setup(struct fireperf_tui* tui) {
 	init_pair(2, COLOR_GREEN,  COLOR_BLACK);
 	init_pair(3, COLOR_BLUE,   COLOR_BLACK);
 	init_pair(4, COLOR_BLACK,  COLOR_WHITE);
+	init_pair(5, COLOR_YELLOW, COLOR_BLACK);
 
 	// Enable raw mode
 	raw();
@@ -277,6 +279,7 @@ static size_t fireperf_tui_get_peak_bps(struct fireperf_tui* tui, int max) {
 */
 static int fireperf_tui_draw_graph(struct fireperf_tui* tui) {
 	const struct fireperf_stats* stats = NULL;
+	char* scale = NULL;
 
 	int max_x = 0;
 	int max_y = 0;
@@ -290,7 +293,30 @@ static int fireperf_tui_draw_graph(struct fireperf_tui* tui) {
 	size_t peak_bps = fireperf_tui_get_peak_bps(tui, max_x);
 
 	// Figure out how many bps a step represents
-	double step = peak_bps / (max_y + 1);
+	double step = peak_bps / (max_y + 0);
+
+	// Make the brush yellow
+	wattron(tui->graph, COLOR_PAIR(5));
+
+	// Draw the grid
+	for (double line = 0; line <= 1; line += 0.25) {
+		scale = format_size(line * peak_bps, FIREPERF_FORMAT_BITS);
+		if (!scale)
+			continue;
+
+		size_t l = strlen(scale);
+
+		// Draw a horizontal line
+		for (unsigned int x = 0; x < max_x - l - 1; x++) {
+			mvwaddch(tui->graph, max_y - (max_y * line), x, ACS_HLINE);
+		}
+
+		// Write the scale
+		mvwaddnstr(tui->graph, max_y - (max_y * line), max_x - l, scale, l);
+		free(scale);
+	}
+
+	wattroff(tui->graph, COLOR_PAIR(5));
 
 	// Make the brush red
 	wattron(tui->graph, COLOR_PAIR(1));