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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 "widget.h"
#include "screen.h"
#include "common/draw.h"
extern awesome_t globalconf;
typedef enum
{
Top_Style = 1,
Bottom_Style,
Line_Style
} draw_style_t;
typedef struct
{
/* general layout */
char **data_title; /** Data title of the data sections */
float *max; /** Represents a full graph */
int width; /** Width of the widget */
float height; /** Height of graph (0.0-1.0; 1.0 = height of bar) */
int box_height; /** Height of the innerbox in pixels */
int size; /** Size of lines-array (also innerbox-lenght) */
xcolor_t bg; /** Background color */
xcolor_t bordercolor; /** Border color */
position_t grow; /** grow: Left or Right */
bool *scale; /** Scale the graph */
/* markers... */
int *index; /** Index of current (new) value */
int *max_index; /** Index of the actual maximum value */
float *current_max; /** Pointer to current maximum value itself */
draw_style_t *draw_style; /** Draw style of according index */
/* all data is stored here */
int data_items; /** Number of data-input items */
int **lines; /** Keeps the calculated values (line-length); */
float **values; /** Actual values */
bool *vertical_gradient; /** Create a vertical color gradient */
xcolor_t *color_start; /** Color of them */
xcolor_t **pcolor_center; /** Color at middle of graph */
xcolor_t **pcolor_end; /** Color at end of graph */
int *draw_from; /** Preparation/tmp array for draw_graph(); */
int *draw_to; /** Preparation/tmp array for draw_graph(); */
} Data;
/* 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 void
graph_data_add(Data *d, const char *new_data_title)
{
d->data_items++;
/* memory (re-)allocating + initialising */
p_realloc(&(d->values), d->data_items);
d->values[d->data_items - 1] = p_new(float, d->size);
p_realloc(&(d->lines), d->data_items);
d->lines[d->data_items - 1] = p_new(int, d->size);
p_realloc(&(d->scale), d->data_items);
d->scale[d->data_items - 1] = false;
p_realloc(&(d->index), d->data_items);
d->index[d->data_items - 1] = 0;
p_realloc(&(d->max_index), d->data_items);
d->max_index[d->data_items - 1] = 0;
p_realloc(&(d->current_max), d->data_items);
d->current_max[d->data_items - 1] = 0;
p_realloc(&(d->max), d->data_items);
d->max[d->data_items - 1] = 100.0;
p_realloc(&(d->data_title), d->data_items);
d->data_title[d->data_items - 1] = a_strdup(new_data_title);
p_realloc(&(d->color_start), d->data_items);
d->color_start[d->data_items - 1] = globalconf.colors.fg;
p_realloc(&(d->pcolor_center), d->data_items);
d->pcolor_center[d->data_items - 1] = NULL;
p_realloc(&(d->pcolor_end), d->data_items);
d->pcolor_end[d->data_items - 1] = NULL;
p_realloc(&(d->vertical_gradient), d->data_items);
d->vertical_gradient[d->data_items - 1] = true;
p_realloc(&(d->draw_style), d->data_items);
d->draw_style[d->data_items - 1] = Bottom_Style;
}
static int
graph_draw(draw_context_t *ctx,
int screen __attribute__ ((unused)),
widget_node_t *w,
int width, int height, int offset,
int used __attribute__ ((unused)),
void *p __attribute__ ((unused)))
{
int margin_top;
int z, y, x, tmp, cur_index, test_index;
Data *d = w->widget->data;
area_t rectangle, pattern_area;
if(!d->data_items)
return 0;
w->area.x = widget_calculate_offset(width,
d->width, offset,
w->widget->align);
w->area.y = 0;
/* box = the graph inside the rectangle */
if(!(d->box_height))
d->box_height = (int) (height * d->height + 0.5) - 2;
margin_top = (int)((height - (d->box_height + 2)) / 2 + 0.5) + 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;
pattern_area.y = rectangle.y - rectangle.height;
/* draw style = top */
for(z = 0; z < d->data_items; z++)
{
if(d->draw_style[z] != Top_Style)
continue;
if(d->vertical_gradient[z])
{
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;
}
cur_index = d->index[z];
for(y = 0; y < d->size; y++)
{
/* draw this filltop data thing [z]. But figure out the part
* what shall be visible. Therefore find the next smaller value
* on this index (draw_from) - might be 0 (then draw from start) */
for(tmp = 0, x = 0; x < d->data_items; x++)
{
if(d->draw_style[x] != Top_Style)
continue;
if (x == z) /* no need to compare with itself */
continue;
/* current index's can be different (widget_tell might shift
* some with a different frequenzy), so calculate
* offset and compare accordingly finally */
test_index = cur_index + (d->index[x] - d->index[z]);
if (test_index < 0)
test_index = d->size + test_index; /* text_index is minus, since < 0 */
else if(test_index >= d->size)
test_index -= d->size;
/* ... (test_)index to test for a smaller value found. */
/* if such a smaller value (to not overdraw!) is there, store into 'tmp' */
if(d->lines[x][test_index] > tmp && d->lines[x][test_index] < d->lines[z][cur_index])
tmp = d->lines[x][test_index];
}
/* reverse values (because drawing from top) */
d->draw_from[cur_index] = d->box_height - tmp; /* i.e. no smaller value -> from top of box */
d->draw_to[cur_index] = d->box_height - d->lines[z][cur_index]; /* i.e. on full graph -> 0 = bottom */
if (--cur_index < 0) /* next index to compare to other values */
cur_index = d->size - 1;
}
draw_graph(ctx, rectangle , d->draw_from, d->draw_to, d->index[z], d->grow, pattern_area,
&(d->color_start[z]), d->pcolor_center[z], d->pcolor_end[z]);
}
pattern_area.y = rectangle.y;
/* draw style = bottom */
for(z = 0; z < d->data_items; z++)
{
if(d->draw_style[z] != Bottom_Style)
continue;
if(d->vertical_gradient[z])
{
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;
}
cur_index = d->index[z];
for(y = 0; y < d->size; y++)
{
for(tmp = 0, x = 0; x < d->data_items; x++)
{
if(d->draw_style[x] != Bottom_Style)
continue;
if (x == z)
continue;
test_index = cur_index + (d->index[x] - d->index[z]);
if (test_index < 0)
test_index = d->size + test_index;
else if(test_index >= d->size)
test_index -= d->size;
if(d->lines[x][test_index] > tmp && d->lines[x][test_index] < d->lines[z][cur_index])
tmp = d->lines[x][test_index];
}
d->draw_from[cur_index] = tmp;
if (--cur_index < 0)
cur_index = d->size - 1;
}
draw_graph(ctx, rectangle, d->draw_from, d->lines[z], d->index[z], d->grow, pattern_area,
&(d->color_start[z]), d->pcolor_center[z], d->pcolor_end[z]);
}
/* draw style = line */
for(z = 0; z < d->data_items; z++)
{
if(d->draw_style[z] != Line_Style)
continue;
if(d->vertical_gradient[z])
{
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, d->lines[z], d->index[z], d->grow, pattern_area,
&(d->color_start[z]), d->pcolor_center[z], d->pcolor_end[z]);
}
/* 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 = height;
return w->area.width;
}
static widget_tell_status_t
graph_tell(widget_t *widget, const char *property, const char *new_value)
{
Data *d = widget->data;
int i, u, fi;
float value;
char *title, *setting;
char *new_val;
bool found;
if(!new_value)
return WIDGET_ERROR_NOVALUE;
/* following properties need a datasection */
else if(!a_strcmp(property, "data")
|| !a_strcmp(property, "fg")
|| !a_strcmp(property, "fg_center")
|| !a_strcmp(property, "fg_end")
|| !a_strcmp(property, "vertical_gradient")
|| !a_strcmp(property, "scale")
|| !a_strcmp(property, "max")
|| !a_strcmp(property, "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(found = false, fi = 0; fi < d->data_items; fi++)
{
if(!a_strcmp(title, d->data_title[fi]))
{
found = true;
break;
}
}
/* no section found -> create one */
if(!found)
{
graph_data_add(d, title);
fi = d->data_items - 1;
}
/* change values accordingly... */
if(!a_strcmp(property, "data"))
{
/* assign incoming value */
value = MAX(atof(setting), 0);
if(++d->index[fi] >= d->size) /* cycle inside the array */
d->index[fi] = 0;
if(d->scale[fi]) /* scale option is true */
{
d->values[fi][d->index[fi]] = value;
if(value > d->current_max[fi]) /* a new maximum value found */
{
d->max_index[fi] = d->index[fi];
d->current_max[fi] = value;
/* recalculate */
for (u = 0; u < d->size; u++)
d->lines[fi][u] = (int) (d->values[fi][u] * (d->box_height) / d->current_max[fi] + 0.5);
}
/* old max_index reached + current_max > normal, re-check/generate */
else if(d->max_index[fi] == d->index[fi] && d->current_max[fi] > d->max[fi])
{
/* find the new max */
for(u = 0; u < d->size; u++)
if(d->values[fi][u] > d->values[fi][d->max_index[fi]])
d->max_index[fi] = u;
d->current_max[fi] = MAX(d->values[fi][d->max_index[fi]], d->max[fi]);
/* recalculate */
for(u = 0; u < d->size; u++)
d->lines[fi][u] = (int) (d->values[fi][u] * d->box_height / d->current_max[fi] + 0.5);
}
else
d->lines[fi][d->index[fi]] = (int) (value * d->box_height / d->current_max[fi] + 0.5);
}
else /* scale option is false - limit to d->box_height */
{
if (value < d->max[fi])
d->lines[fi][d->index[fi]] = (int) (value * d->box_height / d->max[fi] + 0.5);
else
d->lines[fi][d->index[fi]] = d->box_height;
}
p_delete(&new_val);
return WIDGET_NOERROR;
}
else if(!a_strcmp(property, "fg"))
xcolor_new(globalconf.connection, globalconf.default_screen, setting, &(d->color_start[fi]));
else if(!a_strcmp(property, "fg_center"))
graph_pcolor_set(&(d->pcolor_center[fi]), setting);
else if(!a_strcmp(property, "fg_end"))
graph_pcolor_set(&(d->pcolor_end[fi]), setting);
else if(!a_strcmp(property, "vertical_gradient"))
d->vertical_gradient[fi] = a_strtobool(setting);
else if(!a_strcmp(property, "scale"))
d->scale[fi] = a_strtobool(setting);
else if(!a_strcmp(property, "max"))
{
d->max[fi] = atof(setting);
d->current_max[fi] = d->max[fi];
}
else if(!a_strcmp(property, "draw_style"))
{
if(!a_strcmp(setting, "bottom"))
d->draw_style[fi] = Bottom_Style;
else if(!a_strcmp(setting, "line"))
d->draw_style[fi] = Line_Style;
else if(!a_strcmp(setting, "top"))
d->draw_style[fi] = Top_Style;
else
{
warn("'error changing property %s of widget %s, must be 'bottom', 'top' or 'line'",
property, widget->name);
p_delete(&new_val);
return WIDGET_ERROR_CUSTOM;
}
}
p_delete(&new_val);
return WIDGET_NOERROR;
}
else if(!a_strcmp(property, "height"))
d->height = atof(new_value);
else if(!a_strcmp(property, "width"))
{
d->width = atoi(new_value);
d->size = d->width - 2;
/* re-allocate/initialise necessary values */
for(i = 0; i < d->data_items; i++)
{
p_delete(&d->values[i]);
p_delete(&d->lines[i]);
d->values[i] = p_new(float, d->size);
d->lines[i] = p_new(int, d->size);
d->index[i] = 0;
d->current_max[i] = 0;
d->max_index[i] = 0;
}
}
else if(!a_strcmp(property, "bg"))
{
if(!xcolor_new(globalconf.connection,
globalconf.default_screen,
new_value, &d->bg))
return WIDGET_ERROR_FORMAT_COLOR;
}
else if(!a_strcmp(property, "bordercolor"))
{
if(!xcolor_new(globalconf.connection,
globalconf.default_screen,
new_value, &d->bordercolor))
return WIDGET_ERROR_FORMAT_COLOR;
}
else if(!a_strcmp(property, "grow"))
switch((d->grow = position_get_from_str(new_value)))
{
case Left:
case Right:
break;
default:
warn("error changing property %s of widget %s, must be 'left' or 'right'",
property, widget->name);
return WIDGET_ERROR_CUSTOM;
}
else
return WIDGET_ERROR;
return WIDGET_NOERROR;
}
widget_t *
graph_new(alignment_t align)
{
widget_t *w;
Data *d;
w = p_new(widget_t, 1);
widget_common_new(w);
w->draw = graph_draw;
w->tell = graph_tell;
w->align = align;
d = w->data = p_new(Data, 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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