summaryrefslogtreecommitdiff
path: root/multiload/load-graph.c
blob: bf004394b2b94e81b1ca61f7554057cf55e4ba96 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
#include <config.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <signal.h>
#include <dirent.h>
#include <string.h>
#include <time.h>
#include <glib.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>
#include <gio/gio.h>
#include <mate-panel-applet.h>
#include <mate-panel-applet-gsettings.h>
#include <math.h>

#include "global.h"

/*
  Shifts data right

  data[i+1] = data[i]

  data[i] are int*, so we just move the pointer, not the data.
  But moving data loses data[n-1], so we save data[n-1] and reuse
  it as new data[0]. In fact, we rotate data[].

*/

static void
shift_right(LoadGraph *g)
{
	unsigned i;
	int* last_data;

	/* data[g->draw_width - 1] becomes data[0] */
	last_data = g->data[g->draw_width - 1];

	/* data[i+1] = data[i] */
	for(i = g->draw_width - 1; i != 0; --i)
		g->data[i] = g->data[i - 1];

	g->data[0] = last_data;
}


/* Redraws the backing pixmap for the load graph and updates the window */
static void
load_graph_draw (LoadGraph *g)
{
  guint i, j, k;
  cairo_t *cr;
  int load;
  MultiloadApplet *multiload;

  multiload = g->multiload;

  /* we might get called before the configure event so that
   * g->disp->allocation may not have the correct size
   * (after the user resized the applet in the prop dialog). */

  if (!g->surface)
    g->surface = gdk_window_create_similar_surface (gtk_widget_get_window (g->disp),
                                                    CAIRO_CONTENT_COLOR,
                                                    g->draw_width, g->draw_height);

  cr = cairo_create (g->surface);
  cairo_set_line_width (cr, 1.0);
  cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
  cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);

  /* all graphs except Load and Net go this path */
  if (g->id != 4 && g->id != 2)
  {
    for (i = 0; i < g->draw_width; i++)
      g->pos [i] = g->draw_height - 1;

    for (j = 0; j < g->n; j++)
    {
      gdk_cairo_set_source_rgba (cr, &(g->colors [j]));

      for (i = 0; i < g->draw_width; i++)
      {
        if (g->data [i][j] != 0)
        {
          cairo_move_to (cr, g->draw_width - i - 0.5, g->pos[i] + 0.5);
          cairo_line_to (cr, g->draw_width - i - 0.5, g->pos[i] - (g->data [i][j] - 0.5));
        }
        g->pos [i] -= g->data [i][j];
      }
      cairo_stroke (cr);
    }
  }
  /* This is for network graph */
  else if (g->id == 2)
  {
    guint maxnet = 1;
    gint segments = 1;
    gint combined;
    guint net_threshold;

    for (i = 0; i < g->draw_width; i++)
    {
      g->pos [i] = g->draw_height - 1;
      combined = g->data[i][0] +
                 g->data[i][1] +
                 g->data[i][2];
      if (combined > maxnet)
        maxnet = combined;
    }
    //printf("max = %d ", maxnet);
    guint level = 0;
    if (maxnet > multiload->net_threshold3) {
      net_threshold = multiload->net_threshold3;
      level = 3;
    }
    else
      if (maxnet > multiload->net_threshold2) {
        net_threshold = multiload->net_threshold2;
        level = 2;
      }
      else {
        net_threshold = multiload->net_threshold1;
        level = 1;
        if (maxnet < multiload->net_threshold1)
          level = 0;
      }

    //printf("level %d maxnet = %d ", level, maxnet);
    maxnet = maxnet/net_threshold;
    segments = MAX (maxnet+1,1);
    float ratio = (float)g->draw_height/net_threshold/segments;
    //printf("segments %d ratio = %f t1=%ld t2=%ld t3=%ld t=%ld\n", segments, ratio, multiload->net_threshold1, multiload->net_threshold2, multiload->net_threshold3, multiload->net_threshold);

    for (j = 0; j < g->n-1; j++)
    {
      gdk_cairo_set_source_rgba (cr, &(g->colors [j]));

      for (i = 0; i < g->draw_width; i++)
      {
        cairo_move_to (cr, g->draw_width - i - 0.5, g->pos[i] + 0.5);
        cairo_line_to (cr, g->draw_width - i - 0.5, g->pos[i] - 0.5 - ((g->data [i][j] * ratio)));
        g->pos [i] -= ((g->data [i][j] * ratio));
      }
      cairo_stroke (cr);
    }

    for (j = g->n-1; j < g->n; j++)
    {
      gdk_cairo_set_source_rgba (cr, &(g->colors [j]));
      for (i = 0; i < g->draw_width; i++)
      {
          cairo_move_to (cr, g->draw_width - i - 0.5, g->pos[i] + 0.5);
          cairo_line_to (cr, g->draw_width - i - 0.5, 0.5);
      }
      cairo_stroke (cr);
    }

    /* draw grid lines if needed */
    gdk_cairo_set_source_rgba (cr, &(g->colors [4]));
    double spacing;
    for (k = 0; k < segments -1; k++)
    {
      spacing = ((double) g->draw_height/segments) * (k+1);
      cairo_move_to (cr, 0.5, spacing);
      cairo_line_to (cr, g->draw_width-0.5, spacing);
    }
    cairo_stroke (cr);
    /* draw indicator if needed */
    if (level > 0)
    {
      gdk_cairo_set_source_rgba (cr, &(g->colors [5]));
      for (k = 0; k< level; k++ )
        cairo_rectangle(cr, 0.5, (k*2) * g->draw_height/5, 5, g->draw_height/5);
      cairo_fill(cr);
    }
    cairo_stroke (cr);
  }
  /* this is Load graph */
  else
  {
    guint maxload =	1;
    for (i = 0; i < g->draw_width; i++)
    {
      g->pos [i] = g->draw_height - 1;
      /* find maximum value */
      if (g->data[i][0] > maxload)
        maxload = g->data[i][0];
    }
    load = ceil ((double) (maxload/g->draw_height)) + 1;
    load = MAX (load,1);

    for (j = 0; j < g->n; j++)
    {
      gdk_cairo_set_source_rgba (cr, &(g->colors [j]));

      for (i = 0; i < g->draw_width; i++)
      {
        cairo_move_to (cr, g->draw_width - i - 0.5, g->pos[i] + 0.5);
        if (j == 0)
        {
          cairo_line_to (cr, g->draw_width - i - 0.5, g->pos[i] - ((g->data [i][j] - 0.5)/load));
        }
        else
        {
          cairo_line_to (cr, g->draw_width - i - 0.5, 0.5);
        }
        g->pos [i] -= g->data [i][j] / load;
      }
      cairo_stroke (cr);
    }

    /* draw grid lines in Load graph if needed */
    gdk_cairo_set_source_rgba (cr, &(g->colors [2]));

    double spacing;
    for (k = 0; k < load - 1; k++)
    {
      spacing = ((double) g->draw_height/load) * (k+1);
      cairo_move_to (cr, 0.5, spacing);
      cairo_line_to (cr, g->draw_width-0.5, spacing);
		}

    cairo_stroke (cr);
  }
  gtk_widget_queue_draw (g->disp);

  cairo_destroy (cr);
}

/* Updates the load graph when the timeout expires */
static gboolean
load_graph_update (LoadGraph *g)
{
    if (g->data == NULL)
	return TRUE;

    shift_right(g);

    if (g->tooltip_update)
	multiload_applet_tooltip_update(g);

    g->get_data (g->draw_height, g->data [0], g);

    load_graph_draw (g);
    return TRUE;
}

void
load_graph_unalloc (LoadGraph *g)
{
    guint i;

    if (!g->allocated)
		return;

    for (i = 0; i < g->draw_width; i++)
    {
        g_free (g->data [i]);
    }

    g_free (g->data);
    g_free (g->pos);

    g->pos = NULL;
    g->data = NULL;

    g->size = g_settings_get_int(g->multiload->settings, "size");
    g->size = MAX (g->size, 10);

    if (g->surface) {
        cairo_surface_destroy (g->surface);
        g->surface = NULL;
    }

    g->allocated = FALSE;
}

static void
load_graph_alloc (LoadGraph *g)
{
    guint i;

    if (g->allocated)
        return;

    g->data = g_new0 (gint *, g->draw_width);
    g->pos = g_new0 (guint, g->draw_width);

    g->data_size = sizeof (guint) * g->n;

    for (i = 0; i < g->draw_width; i++) {
        g->data [i] = g_malloc0 (g->data_size);
    }

    g->allocated = TRUE;
}

static gint
load_graph_configure (GtkWidget *widget, GdkEventConfigure *event,
                      gpointer data_ptr)
{
    GtkAllocation allocation;
    LoadGraph *c = (LoadGraph *) data_ptr;

    load_graph_unalloc (c);

    gtk_widget_get_allocation (c->disp, &allocation);

    c->draw_width = allocation.width;
    c->draw_height = allocation.height;
    c->draw_width = MAX (c->draw_width, 1);
    c->draw_height = MAX (c->draw_height, 1);

    load_graph_alloc (c);

    if (!c->surface)
        c->surface = gdk_window_create_similar_surface (gtk_widget_get_window (c->disp),
                                                        CAIRO_CONTENT_COLOR,
                                                        c->draw_width, c->draw_height);
    gtk_widget_queue_draw (widget);

    return TRUE;
}

static gint
load_graph_expose (GtkWidget *widget,
                   cairo_t *cr,
                   gpointer data_ptr)
{
    LoadGraph *g = (LoadGraph *) data_ptr;

    cairo_set_source_surface (cr, g->surface, 0, 0);
    cairo_paint (cr);

    return FALSE;
}

static void
load_graph_destroy (GtkWidget *widget, gpointer data_ptr)
{
    LoadGraph *g = (LoadGraph *) data_ptr;

    load_graph_stop (g);

    gtk_widget_destroy(widget);
}

static gboolean
load_graph_clicked (GtkWidget *widget, GdkEventButton *event, LoadGraph *load)
{
    load->multiload->last_clicked = load->id;

    return FALSE;
}

static gboolean
load_graph_enter_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
    LoadGraph *graph;
    graph = (LoadGraph *)data;

    graph->tooltip_update = TRUE;
    multiload_applet_tooltip_update(graph);

    return TRUE;
}

static gboolean
load_graph_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
    LoadGraph *graph;
    graph = (LoadGraph *)data;

    graph->tooltip_update = FALSE;

    return TRUE;
}

static void
load_graph_load_config (LoadGraph *g)
{
    gchar *name, *temp;
    guint i;

    if (!g->colors)
        g->colors = g_new0(GdkRGBA, g->n);

    for (i = 0; i < g->n; i++)
    {
        name = g_strdup_printf ("%s-color%u", g->name, i);
        temp = g_settings_get_string(g->multiload->settings, name);
        if (!temp)
            temp = g_strdup ("#000000");
        gdk_rgba_parse(&(g->colors[i]), temp);
        g_free(temp);
        g_free(name);
    }
}

LoadGraph *
load_graph_new (MultiloadApplet *ma, guint n, const gchar *label,
                guint id, guint speed, guint size, gboolean visible,
                const gchar *name, LoadGraphDataFunc get_data)
{
    LoadGraph *g;
    MatePanelAppletOrient orient;

    g = g_new0 (LoadGraph, 1);
    g->visible = visible;
    g->name = name;
    g->n = n;
    g->id = id;
    g->speed  = MAX (speed, 50);
    g->size   = MAX (size, 10);
    g->pixel_size = mate_panel_applet_get_size (ma->applet);
    g->tooltip_update = FALSE;
    g->show_frame = TRUE;
    g->multiload = ma;

    g->main_widget = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);

    g->box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);

    orient = mate_panel_applet_get_orient (g->multiload->applet);
    switch (orient)
    {
    case MATE_PANEL_APPLET_ORIENT_UP:
    case MATE_PANEL_APPLET_ORIENT_DOWN:
    {
        g->orient = FALSE;
        break;
    }
    case MATE_PANEL_APPLET_ORIENT_LEFT:
    case MATE_PANEL_APPLET_ORIENT_RIGHT:
    {
        g->orient = TRUE;
        break;
    }
    default:
        g_assert_not_reached ();
    }

    if (g->show_frame)
    {
        g->frame = gtk_frame_new (NULL);
        gtk_frame_set_shadow_type (GTK_FRAME (g->frame), GTK_SHADOW_IN);
        gtk_container_add (GTK_CONTAINER (g->frame), g->box);
        gtk_box_pack_start (GTK_BOX (g->main_widget), g->frame, TRUE, TRUE, 0);
    }
    else
    {
        g->frame = NULL;
        gtk_box_pack_start (GTK_BOX (g->main_widget), g->box, TRUE, TRUE, 0);
    }

    load_graph_load_config (g);

    g->get_data = get_data;

    g->timer_index = -1;

    if (g->orient)
        gtk_widget_set_size_request (g->main_widget, -1, g->size);
    else
        gtk_widget_set_size_request (g->main_widget, g->size, -1);

    g->disp = gtk_drawing_area_new ();
    gtk_widget_set_events (g->disp, GDK_EXPOSURE_MASK |
                                    GDK_ENTER_NOTIFY_MASK |
                                    GDK_LEAVE_NOTIFY_MASK |
                                    GDK_BUTTON_PRESS_MASK);

    g_signal_connect (G_OBJECT (g->disp), "draw",
                      G_CALLBACK (load_graph_expose), g);
    g_signal_connect (G_OBJECT(g->disp), "configure_event",
                      G_CALLBACK (load_graph_configure), g);
    g_signal_connect (G_OBJECT(g->disp), "destroy",
                      G_CALLBACK (load_graph_destroy), g);
    g_signal_connect (G_OBJECT(g->disp), "button-press-event",
                      G_CALLBACK (load_graph_clicked), g);
    g_signal_connect (G_OBJECT(g->disp), "enter-notify-event",
                      G_CALLBACK(load_graph_enter_cb), g);
    g_signal_connect (G_OBJECT(g->disp), "leave-notify-event",
                      G_CALLBACK(load_graph_leave_cb), g);

    gtk_box_pack_start (GTK_BOX (g->box), g->disp, TRUE, TRUE, 0);
    gtk_widget_show_all(g->box);

    return g;
}

void
load_graph_start (LoadGraph *g)
{
    if (g->timer_index != -1)
        g_source_remove (g->timer_index);

    g->timer_index = g_timeout_add (g->speed,
                                    (GSourceFunc) load_graph_update, g);
}

void
load_graph_stop (LoadGraph *g)
{
    if (g->timer_index != -1)
        g_source_remove (g->timer_index);

    g->timer_index = -1;
}