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Text output after a call to settextjustify is justified around the current position (CP) horizontally and vertically, as specified. The default justification settings are LEFT_TEXT (for horizontal) and TOP_TEXT (for vertical). The enumeration text_just in graphics.h provides names for the horiz and vert settings passed to settextjustify. ==== Description of settextjustify ==== <code c> Name Value Action horiz LEFT_TEXT 0 left-justify text CENTER_TEXT 1 center text RIGHT_TEXT 2 right-justify text vertical BOTTOM_TEXT 0 bottom-justify text CENTER_TEXT 1 center text TOP_TEXT 2 top-justify text If horiz is equal to LEFT_TEXT and direction equals HORIZ_DIR, the CP's x component is advanced after a call to outtext(string) by textwidth (string). settextjustify affects text written with outtext and cannot be used with text mode and stream functions.
/* settextjustify example */ #include <graphics.h> #include <stdlib.h> #include <stdio.h> #include <conio.h> /* function prototype */ void xat(int x, int y); /* horizontal text justification settings */ char *hjust[] = { "LEFT_TEXT", "CENTER_TEXT", "RIGHT_TEXT" }; /* vertical text justification settings */ char *vjust[] = { "BOTTOM_TEXT", "CENTER_TEXT", "TOP_TEXT" }; int main(void) { /* request autodetection */ int gdriver = DETECT, gmode, errorcode; int midx, midy, hj, vj; char msg[80]; /* initialize graphics and local variables */ initgraph(&gdriver, &gmode, ""); /* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) { /* an error occurred */ printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ } midx = getmaxx() / 2; midy = getmaxy() / 2; /* loop through text justifications */ for (hj=LEFT_TEXT; hj<=RIGHT_TEXT; hj++) for (vj=LEFT_TEXT; vj<=RIGHT_TEXT; vj++) { cleardevice(); /* set the text justification */ settextjustify(hj, vj); /* create a message string */ sprintf(msg, "%s %s", hjust[hj], vjust[vj]); /* create crosshairs on the screen */ xat(midx, midy); /* output the message */ outtextxy(midx, midy, msg); getch(); } /* clean up */ closegraph(); return 0; } void xat(int x, int y) /* draw an x at (x,y) */ { line(x-4, y, x+4, y); line(x, y-4, x, y+4); }
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