aus dem 9. Teil in die RISC OS C-Programmierung: Symbole und Ereignisbehandlung: Pollspeed.
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/* Programm misst die Pollgeschwindigkeit
program measures the pool speed
Alexander Ausserstorfer, 08.01.2017 */
#include "oslib/wimp.h"
#include "oslib/hourglass.h"
#include "oslib/os.h" /* read_monotonic_timer */
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
int main()
{
/* melde Aufgabe beim Betriebssystem an
report our task to WIMP */
wimp_version_no version_out;
wimp_t task_handle;
task_handle=wimp_initialise(310, "Pollspeed", NULL, &version_out);
/* Lege Datenblock für Fenster + Symbol an
install data block for window and icon */
wimp_window *window;
window = malloc(sizeof(wimp_window) + 2*sizeof(wimp_icon));
window->visible.x0 = 500;
window->visible.y0 = 200;
window->visible.x1 = 805;
window->visible.y1 = 255;
window->xscroll = 0;
window->yscroll = 0;
window->next = wimp_TOP;
window->flags = wimp_WINDOW_MOVEABLE | wimp_WINDOW_AUTO_REDRAW | wimp_WINDOW_BACK_ICON | wimp_WINDOW_CLOSE_ICON | wimp_WINDOW_TITLE_ICON | wimp_WINDOW_NEW_FORMAT;
window->title_fg = wimp_COLOUR_BLACK;
window->title_bg = wimp_COLOUR_LIGHT_GREY;
window->work_fg = wimp_COLOUR_BLACK;
window->work_bg = wimp_COLOUR_VERY_LIGHT_GREY;
window->scroll_outer = wimp_COLOUR_MID_LIGHT_GREY;
window->scroll_inner = wimp_COLOUR_VERY_LIGHT_GREY;
window->highlight_bg = wimp_COLOUR_CREAM;
window->extent.x0 = 0;
window->extent.y0 = -200;
window->extent.x1 = 500;
window->extent.y1 = 0;
window->extra_flags = 0;
window->title_flags = wimp_ICON_TEXT | wimp_ICON_HCENTRED | wimp_ICON_VCENTRED;
window->work_flags = wimp_BUTTON_CLICK << wimp_ICON_BUTTON_TYPE_SHIFT;
window->sprite_area = 0;
strncpy (window->title_data.text, "Pollspeed", 12);
window->icon_count = 2;
window->xmin = 0;
window->ymin = 0;
window->icons[0].extent.x0 = 5;
window->icons[0].extent.y0 = -57;
window->icons[0].extent.x1 = 205;
window->icons[0].extent.y1 = -5;
window->icons[0].flags = wimp_ICON_TEXT | wimp_ICON_INDIRECTED | wimp_ICON_HCENTRED | wimp_COLOUR_BLACK << wimp_ICON_FG_COLOUR_SHIFT | wimp_ICON_BORDER;
char pollspeed[12] = "0";
window->icons[0].data.indirected_text.text = pollspeed;
window->icons[0].data.indirected_text.validation = "R2";
window->icons[0].data.indirected_text.size = 12;
window->icons[1].extent.x0 = 210;
window->icons[1].extent.y0 = -57;
window->icons[1].extent.x1 = 305;
window->icons[1].extent.y1 = -5;
window->icons[1].flags = wimp_ICON_TEXT | wimp_ICON_VCENTRED | wimp_COLOUR_BLACK << wimp_ICON_FG_COLOUR_SHIFT;
strcpy (window->icons[1].data.text, "1/sec");
/* Erzeuge Fenster
create window */
wimp_block block;
block.open.w = wimp_create_window (window);
block.open.visible.x0 = window->visible.x0;
block.open.visible.y0 = window->visible.y0;
block.open.visible.x1 = window->visible.x1;
block.open.visible.y1 = window->visible.y1;
block.open.xscroll = window->xscroll;
block.open.yscroll = window->yscroll;
block.open.next = window->next;
/* mache Fenster sichtbar
opens window */
wimp_open_window (&(block.open));
/* Variablen für's Pollen
variables for polling */
wimp_event_no event;
wimp_poll_flags mask = 0;
osbool quit_pending = FALSE;
wimp_block block2;
/* Variable für Laufzeituhr
variable for timer */
os_t oldtime = os_read_monotonic_time();
os_t newtime = 0;
int speed = 0;
/* Hauptschleife
main loop */
while (!quit_pending)
{
/* Erhöhe Zähler
increment counter */
speed++;
/* Laufzeituhr neu auslesen
read timer */
newtime = os_read_monotonic_time();
/* Sichere Zeitstempel
save time */
if (newtime >= (oldtime +100) )
{
/* Wandle gezählte Ansprünge in Text und schreibe diese in die Symbole
convert counted calls to text and write this into the icons */
snprintf(window->icons[0].data.indirected_text.text, (size_t)255, "%d", speed);
wimp_set_icon_state(block.open.w, 0, 0, 0);
/* Setze Zähler zurück
reset counter */
speed = 0;
/* sichere Zeitstempel
save time */
oldtime = newtime;
}
/* Ereignisbehandler
event handler */
event = wimp_poll(mask, &block2, NULL);
switch (event)
{
case wimp_OPEN_WINDOW_REQUEST:
wimp_open_window(&(block2.open));
break;
case wimp_CLOSE_WINDOW_REQUEST:
wimp_close_window(block2.close.w);
quit_pending = true;
break;
case wimp_USER_MESSAGE_RECORDED:
if (block2.message.action == message_QUIT)
{
quit_pending = true;
}
break;
}
}
wimp_close_down(task_handle);
return 0;
}