setup the horizontal axis - ploot - simple plotting tools
HTML git clone git://bitreich.org/ploot git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/ploot
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---
DIR commit 980b7ae7316438998c953a8e098d894aec001c57
DIR parent eb743275f407b73af41d4c5559f173e3e54d7cbd
HTML Author: Josuah Demangeon <mail@josuah.net>
Date: Mon, 30 Apr 2018 21:05:38 +0200
setup the horizontal axis
Diffstat:
M main.c | 64 ++++++++++++++++---------------
1 file changed, 33 insertions(+), 31 deletions(-)
---
DIR diff --git a/main.c b/main.c
@@ -7,12 +7,13 @@
#include "ffdraw.h"
#include "font_14x7.h"
-/* as you see, no css skills needed */
-
-#define MARGIN 5
#define FONT_H 14
#define FONT_W 7
+/* as you see, no css skills needed */
+
+#define MARGIN 2
+
/* height */
#define TITLE_H (MARGIN + FONT_H + MARGIN)
@@ -21,27 +22,27 @@
#define IMAGE_H (TITLE_H + PLOT_H + XLABEL_H)
-#define TITLE_B (0)
-#define TITLE_E (TITLE_H)
-#define PLOT_X_B (TITLE_H)
-#define PLOT_X_E (IMAGE_H - XLABEL_H)
-#define XLABEL_B (IMAGE_H - XLABEL_H)
-#define XLABEL_E (IMAGE_H)
+#define TITLE_MAX (IMAGE_H)
+#define TITLE_MIN (IMAGE_H - TITLE_H)
+#define PLOT_X_MAX (IMAGE_H - TITLE_H)
+#define PLOT_X_MIN (XLABEL_H)
+#define XLABEL_MAX (XLABEL_H)
+#define XLABEL_MIN (0)
/* width */
-#define YLABEL_W (MARGIN + 50 + MARGIN)
+#define YLABEL_W (MARGIN + 20 + MARGIN)
#define PLOT_W 500
#define LEGEND_W (MARGIN + 70 + MARGIN)
#define IMAGE_W (YLABEL_W + PLOT_W + LEGEND_W)
-#define YLABEL_B (0)
-#define YLABEL_E (YLABEL_W)
-#define PLOT_Y_B (YLABEL_W)
-#define PLOT_Y_E (IMAGE_W - LEGEND_W)
-#define LEGEND_B (IMAGE_W - LEGEND_W)
-#define LEGEND_E (IMAGE_W)
+#define LEGEND_MAX (IMAGE_W)
+#define LEGEND_MIN (IMAGE_W - LEGEND_W)
+#define PLOT_Y_MAX (IMAGE_W - LEGEND_W)
+#define PLOT_Y_MIN (YLABEL_W)
+#define YLABEL_MAX (YLABEL_W)
+#define YLABEL_MIN (0)
#define MID(x, y) ((x - y) / 2)
@@ -51,30 +52,30 @@ Color c_axis = { 0xffff, 0xffff, 0xffff, 0xfff };
Font *font = &font_14x7;
void
-ffplot_xaxis(Canvas *can, Color col, time_t tmax, time_t tstep)
+ffplot_xaxis(Canvas *can, Color label, Color grid, time_t tmax, time_t tstep)
{
time_t t;
- int x, y, ystep, width;
+ int y, ystep;
char str[sizeof("YYYY/MM/DD")], *fmt;
if (tstep < 3600) {
- fmt = "%H:%M:%S";
- width = sizeof("HH:MM:SS");
+ fmt = " %H:%M:%S ";
+ ystep = sizeof(" HH:MM:SS ") * FONT_W;
} else {
- fmt = "%Y/%m/%d";
- width = sizeof("YYYY/MM/DD");
+ fmt = " %Y/%m/%d ";
+ ystep = sizeof(" YYYY/MM/DD ") * FONT_W;
}
- ystep = MARGIN + FONT_W * width + MARGIN;
-
t = tmax % tstep;
- x = XLABEL_B + FONT_H / 2;
- y = PLOT_Y_B + PLOT_W % ystep - width / 2;
+ y = PLOT_Y_MAX + PLOT_W % ystep - ystep;
- while (y > PLOT_Y_B) {
+ while (y > PLOT_Y_MIN) {
strftime(str, sizeof(str), fmt, localtime(&t));
- ffdraw_str(can, col, str, font, x, y);
-
+ ffdraw_str(can, label, str, font,
+ XLABEL_MIN + XLABEL_H / 2, y - ystep / 2 + FONT_W);
+ ffdraw_line(can, grid,
+ PLOT_X_MIN, y,
+ PLOT_X_MAX, y);
y -= ystep;
t -= tstep;
}
@@ -102,10 +103,11 @@ static void
ffdraw(Canvas *can)
{
Color col1 = { 0x2222, 0x2222, 0x2222, 0xffff };
- Color col2 = { 0x3333, 0xffff, 0x8888, 0xffff };
+ Color label = { 0x3333, 0xffff, 0x8888, 0xffff };
+ Color grid = { 0x4444, 0x4444, 0x4444, 0xffff };
ffdraw_fill(can, col1);
- ffplot_xaxis(can, col2, 3600 * 24 * 30, 360);
+ ffplot_xaxis(can, label, grid, 3600 * 24 * 30, 360);
/*
ffdraw_line(can, col2, 49,1,9,79);
ffdraw_str(can, col2, "R\\S`T'UaVbWcYdZe\nfghb\tjoi\rklmnopqrstuvwxyz{|}", font, 44, 10);