aus dem 9. Teil in die RISC OS C-Programmierung: Symbole und Ereignisbehandlung: Mauszeiger.
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/* Programm öffnet Fenster und zeigt die aktuellen Koordinaten der Maus program opens window and shows the current position of the mouse 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, "Mauszeiger", NULL, &version_out); /* Lege Datenblock für Fenster + Symbol an install data block for window and icon */ wimp_window *window; window = malloc(sizeof(wimp_window) + 4*sizeof(wimp_icon)); window->visible.x0 = 0; window->visible.y0 = 200; window->visible.x1 = 550; window->visible.y1 = 350; 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_TOGGLE_ICON | wimp_WINDOW_VSCROLL | wimp_WINDOW_SIZE_ICON | wimp_WINDOW_HSCROLL | 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 = -600; window->extent.x1 = 600; 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, "Mauszeiger", 12); window->icon_count = 4; window->xmin = 0; window->ymin = 0; window->icons[0].extent.x0 = 150; window->icons[0].extent.y0 = -100; window->icons[0].extent.x1 = 250; window->icons[0].extent.y1 = -48; 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 x_koordinate[12] = "0"; window->icons[0].data.indirected_text.text = x_koordinate; window->icons[0].data.indirected_text.validation = "R2"; window->icons[0].data.indirected_text.size = strlen(x_koordinate); window->icons[1].extent.x0 = 370; window->icons[1].extent.y0 = -100; window->icons[1].extent.x1 = 470; window->icons[1].extent.y1 = -48; window->icons[1].flags = wimp_ICON_TEXT | wimp_ICON_INDIRECTED | wimp_ICON_HCENTRED | wimp_ICON_VCENTRED | wimp_COLOUR_BLACK << wimp_ICON_FG_COLOUR_SHIFT | wimp_ICON_BORDER; char y_koordinate[12] = "0"; window->icons[1].data.indirected_text.text = y_koordinate; window->icons[1].data.indirected_text.validation = "R2"; window->icons[1].data.indirected_text.size = strlen(y_koordinate); window->icons[2].extent.x0 = 50; window->icons[2].extent.y0 = -100; window->icons[2].extent.x1 = 150; window->icons[2].extent.y1 = -48; window->icons[2].flags = wimp_ICON_TEXT | wimp_ICON_HCENTRED | wimp_ICON_VCENTRED | wimp_COLOUR_BLACK << wimp_ICON_FG_COLOUR_SHIFT; strcpy (window->icons[2].data.text, "x0:"); window->icons[3].extent.x0 = 270; window->icons[3].extent.y0 = -100; window->icons[3].extent.x1 = 370; window->icons[3].extent.y1 = -48; window->icons[3].flags = wimp_ICON_TEXT | wimp_ICON_HCENTRED | wimp_ICON_VCENTRED | wimp_COLOUR_BLACK << wimp_ICON_FG_COLOUR_SHIFT; strcpy (window->icons[3].data.text, "y0:"); /* 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)); /* Datenblock zum Rücklegen von Informationen über den Mauszeiger data block for mouse values */ wimp_pointer pointer; /* Variablen für's Pollen variables for polling */ wimp_event_no event; wimp_poll_flags mask = wimp_MASK_LEAVING | wimp_MASK_ENTERING | wimp_QUEUE_MOUSE | wimp_QUEUE_KEY | wimp_MASK_LOSE | wimp_MASK_GAIN | wimp_QUEUE_REDRAW | wimp_MASK_MESSAGE; osbool quit_pending = FALSE; wimp_block block2; /* Variable für Laufzeituhr variable for timer */ os_t timer = os_read_monotonic_time(); /* Hauptschleife main loop */ while (!quit_pending) { /* Ereignisbehandler event handler */ event = wimp_poll_idle(mask, &block2, timer+3, NULL); switch (event) { case wimp_NULL_REASON_CODE: /* Hole Mauszeiger-Koordinaten get mouse position */ wimp_get_pointer_info(&pointer); /* Wandle Mauszeiger-Koordinaten in Text und schreibe diese in die Symbole convert mouse values to text and write this into the icons */ snprintf(window->icons[0].data.indirected_text.text, (size_t)255, "%d", pointer.pos.x); wimp_set_icon_state(block.open.w, 0, 0, 0); snprintf(window->icons[1].data.indirected_text.text, (size_t)255, "%d", pointer.pos.y); wimp_set_icon_state(block.open.w, 1, 0, 0); /* Laufzeituhr (timer) neu auslesen read timer */ timer = os_read_monotonic_time(); break; 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; }