#include #include #include #include #include "/afs/sipb.mit.edu/user/tlyu/bitmaps/wosat" #define BITMAPDEPTH 1 /* This stuff gets used quite often in a given program; make them global. */ Display *display; int screen; #define SMALL 1 #define OK 0 void main(int argc, char **argv) { Window win; unsigned int width, height; int x = 0, y = 0; unsigned int border_width = 4; unsigned int display_width, display_height; char *window_name = "Basic Not-so-splefty WIndow Program"; char *icon_name = "basicWin"; Pixmap icon_pixmap; XSizeHints size_hints; XEvent report; GC gc; XFontStruct *font_info; char *display_name = NULL; int window_size = 0; /* This connects to the X server */ if((display = XOpenDisplay(display_name)) == NULL){ (void)fprintf(stderr, "basicwin: cannot connect to X server %s\n", XDisplayName(display_name)); exit(-1); } /* get screen size from display structure macro */ screen = DefaultScreen(display); /* size window with enough room for text */ display_width = DisplayWidth(display, screen); display_height = DisplayHeight(display, screen); width = display_width/3, height = display_height/4; /* create opauqe window */ win = XCreateSimpleWindow(display, RootWindow(display, screen), x, y, width, height, border_width, BlackPixel(display, screen), WhitePixel(display, screen)); /* Create pixmap of depth 1 (bitmap) for icon */ icon_pixmap = XCreateBitmapFromData(display, win, wosat_bits, wosat_width, wosat_height); /* initialize size hint property for windowmanager */ size_hints.flags = PPosition | PSize | PMinSize; size_hints.x = x; size_hints.y = y; size_hints.width = width; size_hints.height = height; size_hints.min_width = 350; size_hints.min_height = 250; /* set properties for windowmanager (always before mapping) */ XSetStandardProperties(display, win, window_name, icon_name, icon_pixmap, argv, argc, &size_hints); /* select event types wanted */ XSelectInput(display, win, ExposureMask | KeyPressMask | ButtonPressMask | StructureNotifyMask); load_font(&font_info); /* create GC for text and drawing */ get_GC(win, &gc, font_info); /* Display window */ XMapWindow(display, win); /* get events, use first Expose to display text and graphics; ConfigureNotify to indicate a resize; ButtonPress or KeyPress to exit */ while(1){ XNextEvent(display, &report); switch(report.type){ case Expose: /* get rid of all other Expose events on the queue */ while(XCheckTypedEvent(display, Expose, &report)); if(window_size == SMALL) /* if the window was resized too small to use */ TooSmall(win, gc, font_info); else{ /* place text in window */ draw_text(win, gc, font_info, width, height); draw_graphics(win, gc, width, height); } break; case ConfigureNotify: /* window resized, change width and height to send to draw_text and draw_graphics in next Expose */ width = report.xconfigure.width; height = report.xconfigure.height; if((width < size_hints.min_width) || (height < size_hints.min_height)) window_size = SMALL; else window_size = OK; break; case ButtonPress: /* trickle down into KeyPress (no break) */ case KeyPress: XUnloadFont(display, font_info->fid); XFreeGC(display, gc); XCloseDisplay(display); exit(1); default: /* all events sleected by StructureNotifyMask except ConfigureNotify are thrown away here, since nothing useful is done with them */ break; } } } get_GC(Window win, GC *gc, XFontStruct *font_info) { unsigned long valuemask = 0; /* ignore XCGvalues and use defaults */ XGCValues values; unsigned int line_width = 6; int line_style = LineOnOffDash; int cap_style = CapRound; int join_style = JoinRound; int dash_offset = 0; static char dash_list[] = { 12, 24}; int list_length = 2; /* create default graphics context */ *gc = XCreateGC(display, win, valuemask, &values); /* specify font */ XSetFont(display, *gc, font_info->fid); /* specify black foreground since default may be white on white */ XSetForeground(display, *gc, BlackPixel(display, screen)); /* set line attributes */ XSetLineAttributes(display, *gc, line_width, line_style, cap_style, join_style); /* set dashes to be line-width in length */ XSetDashes(display, *gc, dash_offset, dash_list, list_length); } load_font(XFontStruct **font_info) { char *fontname = "9x15"; /* access the font */ if((*font_info = XLoadQueryFont(display, fontname)) == NULL){ (void)fprintf(stderr, "basicwin: cannot open 9x15 font\n"); exit(-1); } } draw_text(Window win, GC gc, XFontStruct *font_info, unsigned int win_width, unsigned int win_height) { int y = 2 ; /* offset from corner of window */ char *string1 = "Hi! I'm a window, who the hell are you?"; char *string2 = "Hit any key or button while in this"; char *string3 = "window to terminate..."; char *string4 = "Screen Dimensions:"; int len1, len2, len3, len4; int width1, width2, width3; char cd_height[50], cd_width[50], cd_depth[50]; int font_height; int initial_y_offset, x_offset; /* need length for both XTextWidth and XDrawString */ len1 = strlen(string1); len2 = strlen(string2); len3 = strlen(string3); /* get string widths for centering */ width1 = XTextWidth(font_info, string1, len1); width2 = XTextWidth(font_info, string2, len2); width3 = XTextWidth(font_info, string3, len3); /* output text, centered on each line */ XDrawString(display, win, gc, (win_width - width1)/2, y, string1, len1); XDrawString(display, win, gc, (win_width - width2)/2, (int)(win_height - 35), string2, len2); XDrawString(display, win, gc, (win_width - width3)/2, (int)(win_height - 15), string3, len3); /* copy numbers into string variables */ (void)sprintf(cd_height, " Height - %d pixels", DisplayHeight(display, screen)); (void)sprintf(cd_width, " Width - %d pixels", DisplayWidth(display, screen)); (void)sprintf(cd_depth, " Depth - %d plane(s)", DefaultDepth(display, screen)); /* reuse these for same purpose */ len4 = strlen(string4); len1 = strlen(cd_height); len2 = strlen(cd_width); len3 = strlen(cd_depth); font_height = font_info->max_bounds.ascent + font_info->max_bounds.descent; initial_y_offset = win_height/2 - font_height - font_info->max_bounds.descent; x_offset = (int)win_width/4; XDrawString(display, win, gc, x_offset, (int)initial_y_offset, string4, len4); XDrawString(display, win, gc, x_offset, (int)initial_y_offset + font_height, cd_height, len1); XDrawString(display, win, gc, x_offset, (int)initial_y_offset + 2 * font_height, cd_width, len2); XDrawString(display, win, gc, x_offset, (int)initial_y_offset + 3 * font_height, cd_depth, len3); } draw_graphics(Window win, GC gc, unsigned int window_width, unsigned int window_height) { int x, y; unsigned int width, height; height = window_height/2; width = 3 * window_width/4; x = window_width/2 - width/2; /* center */ y = window_height/2 - height/2; XDrawRectangle(display, win, gc, x, y, width, height); } TooSmall(Window win, GC gc, XFontStruct *font_info) { char *string1 = "Too Small"; int y_offset, x_offset; y_offset = font_info->max_bounds.ascent + 2; x_offset = 2; /* output text, centered on each line */ XDrawString(display, win, gc, x_offset, y_offset, string1, strlen(string1)); }