added battery code
git-svn-id: http://tint2.googlecode.com/svn/trunk@74 121b4492-b84c-0410-8b4c-0d4edfb3f3cc
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244
src/battery/battery.c
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244
src/battery/battery.c
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/**************************************************************************
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*
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* Tint2 : battery
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*
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* Copyright (C) 2009 Sebastian Reichel <elektranox@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* or any later version as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**************************************************************************/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <cairo.h>
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#include <cairo-xlib.h>
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#include <pango/pangocairo.h>
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#include "window.h"
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#include "server.h"
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#include "taskbar.h"
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#include "panel.h"
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#include "area.h"
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#include "battery.h"
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#include "clock.h"
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PangoFontDescription *bat1_font_desc;
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PangoFontDescription *bat2_font_desc;
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struct batstate battery_state;
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static char buf_bat_percentage[10];
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static char buf_bat_time[20];
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int8_t battery_low_status;
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char* battery_low_cmd;
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void update_battery(struct batstate *data) {
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FILE *fp;
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char tmp[25];
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int64_t energy_now = 0, energy_full = 0, current_now = 0;
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int seconds = 0;
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int8_t new_percentage = 0;
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fp = fopen("/sys/class/power_supply/BAT0/energy_now", "r");
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if(fp != NULL) {
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fgets(tmp, sizeof tmp, fp);
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energy_now = atoi(tmp);
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fclose(fp);
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} else printf("ERROR: battery applet can't open energy_now\n");
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fp = fopen("/sys/class/power_supply/BAT0/energy_full", "r");
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if(fp != NULL) {
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fgets(tmp, sizeof tmp, fp);
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energy_full = atoi(tmp);
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fclose(fp);
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} else printf("ERROR: battery applet can't open energy_full\n");
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fp = fopen("/sys/class/power_supply/BAT0/current_now", "r");
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if(fp != NULL) {
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fgets(tmp, sizeof tmp, fp);
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current_now = atoi(tmp);
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fclose(fp);
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} else printf("ERROR: battery applet can't open current_now\n");
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fp = fopen("/sys/class/power_supply/BAT0/status", "r");
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if(fp != NULL) {
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fgets(tmp, sizeof tmp, fp);
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fclose(fp);
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} else printf("ERROR: battery applet can't open status");
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data->state = BATTERY_UNKNOWN;
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if(strcasecmp(tmp, "Charging\n")==0) data->state = BATTERY_CHARGING;
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if(strcasecmp(tmp, "Discharging\n")==0) data->state = BATTERY_DISCHARGING;
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if(current_now > 0) {
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switch(data->state) {
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case BATTERY_CHARGING:
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seconds = 3600 * (energy_full - energy_now) / current_now;
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break;
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case BATTERY_DISCHARGING:
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seconds = 3600 * energy_now / current_now;
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break;
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default:
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seconds = 0;
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break;
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}
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} else seconds = 0;
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data->time.hours = seconds / 3600;
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seconds -= 3600 * data->time.hours;
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data->time.minutes = seconds / 60;
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seconds -= 60 * data->time.minutes;
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data->time.seconds = seconds;
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new_percentage = (energy_now*100)/energy_full;
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if(battery_low_status != 0 && battery_low_status == new_percentage && data->percentage > new_percentage) {
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printf("battery low, executing: %s\n", battery_low_cmd);
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if(battery_low_cmd) system(battery_low_cmd);
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}
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data->percentage = new_percentage;
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}
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void init_battery()
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{
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Panel *panel;
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Battery *battery;
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int i, bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
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for (i=0 ; i < nb_panel ; i++) {
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panel = &panel1[i];
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battery = &panel->battery;
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battery->area.parent = panel;
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battery->area.panel = panel;
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battery->area._draw_foreground = draw_battery;
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battery->area._resize = resize_battery;
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if (!battery->area.on_screen) continue;
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battery->area.posy = panel->area.pix.border.width + panel->area.paddingy;
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battery->area.height = panel->area.height - (2 * battery->area.posy);
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battery->area.resize = 1;
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battery->area.redraw = 1;
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update_battery(&battery_state);
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snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
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snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
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get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
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battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
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get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
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battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
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battery->bat2_posy = battery->bat1_posy + bat_percentage_height + 2 - (bat_percentage_height - bat_percentage_height_ink)/2 - (bat_time_height - bat_time_height_ink)/2;
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}
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}
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void draw_battery (void *obj, cairo_t *c, int active)
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{
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Battery *battery = obj;
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PangoLayout *layout;
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layout = pango_cairo_create_layout (c);
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// draw layout
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pango_layout_set_font_description(layout, bat1_font_desc);
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pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
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pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
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pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
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cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
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pango_cairo_update_layout(c, layout);
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cairo_move_to(c, 0, battery->bat1_posy);
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pango_cairo_show_layout(c, layout);
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pango_layout_set_font_description(layout, bat2_font_desc);
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pango_layout_set_indent(layout, 0);
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pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
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pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
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pango_cairo_update_layout(c, layout);
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cairo_move_to(c, 0, battery->bat2_posy);
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pango_cairo_show_layout(c, layout);
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g_object_unref(layout);
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}
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void resize_battery(void *obj)
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{
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Battery *battery = obj;
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PangoLayout *layout;
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int percentage_width, time_width, new_width;
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percentage_width = time_width = 0;
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battery->area.redraw = 1;
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snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
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snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
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cairo_surface_t *cs;
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cairo_t *c;
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Pixmap pmap;
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pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
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cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
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c = cairo_create(cs);
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layout = pango_cairo_create_layout(c);
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// check width
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pango_layout_set_font_description(layout, bat1_font_desc);
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pango_layout_set_indent(layout, 0);
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pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
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pango_layout_get_pixel_size(layout, &percentage_width, NULL);
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pango_layout_set_font_description(layout, bat2_font_desc);
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pango_layout_set_indent(layout, 0);
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pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
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pango_layout_get_pixel_size(layout, &time_width, NULL);
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if(percentage_width > time_width) new_width = percentage_width;
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else new_width = time_width;
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new_width += (2*battery->area.paddingxlr) + (2*battery->area.pix.border.width);
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if(new_width > battery->area.width || new_width < (battery->area.width-6)) {
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int i;
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Panel *panel = ((Area*)obj)->panel;
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printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
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// resize battery
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// we try to limit the number of resize
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battery->area.width = new_width + 1;
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battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.pix.border.width;
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if (panel->clock.area.on_screen)
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battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
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// resize other objects on panel
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for (i=0 ; i < nb_panel ; i++)
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panel1[i].area.resize = 1;
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systray.area.resize = 1;
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panel_refresh = 1;
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}
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g_object_unref (layout);
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cairo_destroy (c);
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cairo_surface_destroy (cs);
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XFreePixmap (server.dsp, pmap);
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}
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62
src/battery/battery.h
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62
src/battery/battery.h
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/**************************************************************************
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* Copyright (C) 2009 Sebastian Reichel <elektranox@gmail.com>
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*
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* Battery with functional data (percentage, time to life) and drawing data
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* (area, font, ...). Each panel use his own drawing data.
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*
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**************************************************************************/
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#ifndef BATTERY_H
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#define BATTERY_H
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "common.h"
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#include "area.h"
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typedef struct Battery {
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// always start with area
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Area area;
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config_color font;
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int bat1_posy;
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int bat2_posy;
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} Battery;
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enum chargestate {
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BATTERY_UNKNOWN,
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BATTERY_CHARGING,
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BATTERY_DISCHARGING
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};
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typedef struct battime {
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int16_t hours;
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int8_t minutes;
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int8_t seconds;
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} battime;
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typedef struct batstate {
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int percentage;
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struct battime time;
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enum chargestate state;
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} batstate;
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extern struct batstate battery_state;
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extern PangoFontDescription *bat1_font_desc;
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extern PangoFontDescription *bat2_font_desc;
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extern int8_t battery_low_status;
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extern char* battery_low_cmd;
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// initialize clock : y position, ...
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void update_battery(struct batstate *data);
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void init_battery();
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void draw_battery(void *obj, cairo_t *c, int active);
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void resize_battery(void *obj);
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#endif
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