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awesome/widgets/graph.c

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/*
* graph.c - a graph widget
*
* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
* Copyright © 2007-2008 Marco Candrian <mac@calmar.ws>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <math.h>
#include "widget.h"
#include "screen.h"
#include "common/tokenize.h"
#include "common/draw.h"
extern awesome_t globalconf;
typedef enum
{
Bottom_Style = 0,
Top_Style,
Line_Style
} draw_style_t;
typedef struct graph_t graph_t;
struct graph_t
{
/** Grapht title of the data sections */
char *title;
/** Represents a full graph */
float max_value;
/** Scale the graph */
bool scale;
/* markers... */
/** Index of current (new) value */
int index;
/** Index of the actual maximum value */
int max_index;
/** Pointer to current maximum value itself */
float current_max;
/** Draw style of according index */
draw_style_t draw_style;
/** Keeps the calculated values (line-length); */
int *lines;
/** Actual values */
float *values;
/** Color of them */
xcolor_t color_start;
/** Color at middle of graph */
xcolor_t *pcolor_center;
/** Color at end of graph */
xcolor_t *pcolor_end;
/** Create a vertical color gradient */
bool vertical_gradient;
/** Next and previous graph */
graph_t *next, *prev;
};
static void
graph_delete(graph_t **g)
{
p_delete(&(*g)->title);
p_delete(&(*g)->lines);
p_delete(&(*g)->values);
p_delete(&(*g)->pcolor_center);
p_delete(&(*g)->pcolor_end);
p_delete(g);
}
DO_SLIST(graph_t, graph, graph_delete)
typedef struct
{
/** Width of the widget */
int width;
/** Height of graph (0.0-1.0; 1.0 = height of bar) */
float height;
/** Height of the innerbox in pixels */
int box_height;
/** Size of lines-array (also innerbox-length) */
int size;
/** Background color */
xcolor_t bg;
/** Border color */
xcolor_t bordercolor;
/** Grow: Left or Right */
position_t grow;
/** Preparation/tmp array for draw_graph(); */
int *draw_from;
/** Preparation/tmp array for draw_graph(); */
int *draw_to;
/** Graph list */
graph_t *graphs;
} graph_data_t;
/* the same as the progressbar_pcolor_set may use a common function */
static void
graph_pcolor_set(xcolor_t **ppcolor, char *new_color)
{
bool flag = false;
if(!*ppcolor)
{
flag = true; /* p_delete && restore to NULL, if xcolor_new unsuccessful */
*ppcolor = p_new(xcolor_t, 1);
}
if(!(xcolor_new(globalconf.connection,
globalconf.default_screen,
new_color, *ppcolor))
&& flag)
p_delete(ppcolor);
}
static graph_t *
graph_data_add(graph_data_t *d, const char *new_data_title)
{
graph_t *graph = p_new(graph_t, 1);
/* memory (re-)allocating + initialising */
graph->values = p_new(float, d->size);
graph->lines = p_new(int, d->size);
graph->max_value = 100.0;
graph->title = a_strdup(new_data_title);
graph->color_start = globalconf.colors.fg;
graph->vertical_gradient = true;
graph_list_append(&d->graphs, graph);
return graph;
}
static int
graph_draw(draw_context_t *ctx,
int screen __attribute__ ((unused)),
widget_node_t *w,
int offset,
int used __attribute__ ((unused)),
void *p __attribute__ ((unused)))
{
int margin_top, y;
graph_data_t *d = w->widget->data;
area_t rectangle, pattern_area;
graph_t *graph;
if(!d->graphs)
return 0;
w->area.x = widget_calculate_offset(ctx->width,
d->width, offset,
w->widget->align);
w->area.y = 0;
/* box = the graph inside the rectangle */
if(!d->box_height)
d->box_height = round(ctx->height * d->height) - 2;
margin_top = round((ctx->height - (d->box_height + 2)) / 2) + w->area.y;
/* draw background */
rectangle.x = w->area.x + 1;
rectangle.y = margin_top + 1;
rectangle.width = d->size;
rectangle.height = d->box_height;
draw_rectangle(ctx, rectangle, 1.0, true, d->bg);
/* for graph drawing */
rectangle.y = margin_top + d->box_height + 1; /* bottom left corner as starting point */
rectangle.width = d->size; /* rectangle.height is not used */
draw_graph_setup(ctx); /* setup some drawing options */
/* gradient begin either left or on the right of the rectangle */
if(d->grow == Right)
pattern_area.x = rectangle.x + rectangle.width;
else
pattern_area.x = rectangle.x;
for(graph = d->graphs; graph; graph = graph->next)
switch(graph->draw_style)
{
case Top_Style:
pattern_area.y = rectangle.y - rectangle.height;
if(graph->vertical_gradient)
{
pattern_area.width = 0;
pattern_area.height = rectangle.height;
}
else
{
pattern_area.height = 0;
if(d->grow == Right)
pattern_area.width = - rectangle.width;
else
pattern_area.width = rectangle.width;
}
for(y = 0; y < d->size; y++)
{
/* reverse values (because drawing from top) */
d->draw_from[y] = d->box_height; /* i.e. no smaller value -> from top of box */
d->draw_to[y] = d->box_height - graph->lines[y]; /* i.e. on full graph -> 0 = bottom */
}
draw_graph(ctx, rectangle , d->draw_from, d->draw_to, graph->index, d->grow, pattern_area,
&graph->color_start, graph->pcolor_center, graph->pcolor_end);
break;
case Bottom_Style:
pattern_area.y = rectangle.y;
if(graph->vertical_gradient)
{
pattern_area.width = 0;
pattern_area.height = - rectangle.height;
}
else
{
pattern_area.height = 0;
if(d->grow == Right)
pattern_area.width = - rectangle.width;
else
pattern_area.width = rectangle.width;
}
p_clear(d->draw_from, d->size);
draw_graph(ctx, rectangle, d->draw_from, graph->lines, graph->index, d->grow, pattern_area,
&graph->color_start, graph->pcolor_center, graph->pcolor_end);
break;
case Line_Style:
pattern_area.y = rectangle.y;
if(graph->vertical_gradient)
{
pattern_area.width = 0;
pattern_area.height = -rectangle.height;
}
else
{
pattern_area.height = 0;
if(d->grow == Right)
pattern_area.width = - rectangle.width;
else
pattern_area.width = rectangle.width;
}
draw_graph_line(ctx, rectangle, graph->lines, graph->index, d->grow, pattern_area,
&graph->color_start, graph->pcolor_center, graph->pcolor_end);
break;
}
/* draw border (after line-drawing, what paints 0-values to the border) */
rectangle.x = w->area.x;
rectangle.y = margin_top;
rectangle.width = d->size + 2;
rectangle.height = d->box_height + 2;
draw_rectangle(ctx, rectangle, 1.0, false, d->bordercolor);
w->area.width = d->width;
w->area.height = ctx->height;
return w->area.width;
}
static widget_tell_status_t
graph_tell(widget_t *widget, const char *property, const char *new_value)
{
graph_data_t *d = widget->data;
graph_t *graph;
int i;
float value;
char *title, *setting;
char *new_val;
awesome_token_t prop = a_tokenize(property, -1);
if(!new_value)
return WIDGET_ERROR_NOVALUE;
switch (prop) {
default:
return WIDGET_ERROR;
case A_TK_HEIGHT:
d->height = atof(new_value);
return WIDGET_NOERROR;
case A_TK_WIDTH:
d->width = atoi(new_value);
d->size = d->width - 2;
/* re-allocate/initialise necessary values */
for(graph = d->graphs; graph; graph = graph->next)
{
p_realloc(&graph->values, d->size);
p_realloc(&graph->lines, d->size);
p_clear(graph->values, d->size);
p_clear(graph->lines, d->size);
graph->index = 0;
graph->current_max = 0;
graph->max_index = 0;
}
return WIDGET_NOERROR;
case A_TK_BG:
if(!xcolor_new(globalconf.connection,
globalconf.default_screen,
new_value, &d->bg))
return WIDGET_ERROR_FORMAT_COLOR;
return WIDGET_NOERROR;
case A_TK_BORDERCOLOR:
if(!xcolor_new(globalconf.connection,
globalconf.default_screen,
new_value, &d->bordercolor))
return WIDGET_ERROR_FORMAT_COLOR;
return WIDGET_NOERROR;
case A_TK_GROW:
switch((d->grow = position_get_from_str(new_value)))
{
case Left:
case Right:
return WIDGET_NOERROR;
default:
warn("error changing property %s of widget %s, must be 'left' or 'right'",
property, widget->name);
return WIDGET_ERROR_CUSTOM;
}
case A_TK_DATA:
case A_TK_FG:
case A_TK_FG_CENTER:
case A_TK_FG_END:
case A_TK_VERTICAL_GRADIENT:
case A_TK_SCALE:
case A_TK_MAX_VALUE:
case A_TK_DRAW_STYLE:
/* check if this section is defined already */
new_val = a_strdup(new_value);
title = strtok(new_val, " ");
if(!(setting = strtok(NULL, " ")))
{
p_delete(&new_val);
return WIDGET_ERROR_NOVALUE;
}
for(graph = d->graphs; graph; graph = graph->next)
if(!a_strcmp(title, graph->title))
break;
/* no section found -> create one */
if(!graph)
graph = graph_data_add(d, title);
break;
}
switch (prop) {
case A_TK_DATA:
/* assign incoming value */
value = MAX(atof(setting), 0);
if(++graph->index >= d->size) /* cycle inside the array */
graph->index = 0;
if(graph->scale) /* scale option is true */
{
graph->values[graph->index] = value;
if(value > graph->current_max) /* a new maximum value found */
{
graph->max_index = graph->index;
graph->current_max = value;
/* recalculate */
for (i = 0; i < d->size; i++)
graph->lines[i] = round(graph->values[i] * d->box_height / graph->current_max);
}
/* old max_index reached + current_max > normal, re-check/generate */
else if(graph->max_index == graph->index
&& graph->current_max > graph->max_value)
{
/* find the new max */
for(i = 0; i < d->size; i++)
if(graph->values[i] > graph->values[graph->max_index])
graph->max_index = i;
graph->current_max = MAX(graph->values[graph->max_index], graph->max_value);
/* recalculate */
for(i = 0; i < d->size; i++)
graph->lines[i] = round(graph->values[i] * d->box_height / graph->current_max);
}
else
graph->lines[graph->index] = round(value * d->box_height / graph->current_max);
}
else /* scale option is false - limit to d->box_height */
{
if(value < graph->max_value)
graph->lines[graph->index] = round(value * d->box_height / graph->max_value);
else
graph->lines[graph->index] = d->box_height;
}
break;
case A_TK_FG:
xcolor_new(globalconf.connection, globalconf.default_screen, setting, &graph->color_start);
break;
case A_TK_FG_CENTER:
graph_pcolor_set(&graph->pcolor_center, setting);
break;
case A_TK_FG_END:
graph_pcolor_set(&graph->pcolor_end, setting);
break;
case A_TK_VERTICAL_GRADIENT:
graph->vertical_gradient = a_strtobool(setting);
break;
case A_TK_SCALE:
graph->scale = a_strtobool(setting);
break;
case A_TK_MAX_VALUE:
graph->max_value = atof(setting);
graph->current_max = graph->max_value;
break;
case A_TK_DRAW_STYLE:
switch (a_tokenize(setting, -1)) {
case A_TK_BOTTOM:
graph->draw_style = Bottom_Style;
break;
case A_TK_LINE:
graph->draw_style = Line_Style;
break;
case A_TK_TOP:
graph->draw_style = Top_Style;
break;
default:
warn("'error changing property %s of widget %s, must be 'bottom', 'top' or 'line'",
property, widget->name);
break;
}
break;
default:
break;
}
p_delete(&new_val);
return WIDGET_NOERROR;
}
static void
graph_destructor(widget_t *widget)
{
graph_data_t *d = widget->data;
graph_list_wipe(&d->graphs);
p_delete(&d->draw_from);
p_delete(&d->draw_to);
p_delete(&d);
}
widget_t *
graph_new(alignment_t align)
{
widget_t *w;
graph_data_t *d;
w = p_new(widget_t, 1);
widget_common_new(w);
w->draw = graph_draw;
w->tell = graph_tell;
w->destructor = graph_destructor;
w->align = align;
d = w->data = p_new(graph_data_t, 1);
d->width = 80;
d->height = 0.80;
d->size = d->width - 2;
d->grow = Left;
d->draw_from = p_new(int, d->size);
d->draw_to = p_new(int, d->size);
d->bg = globalconf.colors.bg;
d->bordercolor = globalconf.colors.fg;
return w;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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