c:graphics.h:textwidth
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| + | ===== textwidth ===== | ||
| + | |||
| + | |||
| + | ====Syntax of textwidth ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | int textwidth(char *textstring); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of textwidth ==== | ||
| + | <code c> | ||
| + | The graphics function textwidth takes the string length, current font | ||
| + | size, and multiplication factor, and determines the width of textstring | ||
| + | in pixels. | ||
| + | This function is useful for computing viewport widths, sizing a title to | ||
| + | make it fit on a graph or in a box, and so on. | ||
| + | Use textwidth to compute the width of strings, instead of doing the | ||
| + | computations manually. When you use this function, no source code | ||
| + | modifications have to be made when different fonts are selected. | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of textwidth ==== | ||
| + | <code c> | ||
| + | /* textwidth example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | int x = 0, y = 0; | ||
| + | int i; | ||
| + | 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 */ | ||
| + | } | ||
| + | |||
| + | y = getmaxy() / 2; | ||
| + | settextjustify(LEFT_TEXT, CENTER_TEXT); | ||
| + | for (i = 1; i < 11; i++) { | ||
| + | /* select the text style, direction, and size */ | ||
| + | settextstyle(TRIPLEX_FONT, HORIZ_DIR, i); | ||
| + | |||
| + | /* create a message string */ | ||
| + | sprintf(msg, "Size: %d", i); | ||
| + | |||
| + | /* output the message */ | ||
| + | outtextxy(x, y, msg); | ||
| + | |||
| + | /* advance to the end of the text */ | ||
| + | |||
| + | x += textwidth(msg); | ||
| + | } | ||
| + | |||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[gettextsettings]] | ||
| + | [[outtext]] | ||
| + | [[outtextxy]] | ||
| + | [[settextstyle]] | ||
| + | [[textheight]] | ||
| + | |||
| + | |||
| + | ===== output of textwidth example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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c/graphics.h/textwidth.txt · Last modified: 2024/02/16 01:05 (external edit)
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