147 lines
2.9 KiB
C++
147 lines
2.9 KiB
C++
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/*** START MAIN.H ***/
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/* http://www.geocities.com/jeff_louie/x11/helloworld.htm* */
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/*
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* main.h
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* TestX
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*
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* Created by Jeff Louie on Tue Feb 03 2004.
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* Copyright (c) 2004 __MyCompanyName__. All rights reserved.
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*
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*/
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#ifndef MAIN_H
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#define MAIN_H 1
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#include <iostream>
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#include <stdlib.h>
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/* include the X library headers */
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/Xos.h>
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class Main {
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public:
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// constructor
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Main(int argc, char * const argv[]);
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//virtual ~Main();
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private:
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/* here are our X variables */
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Display *dis;
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int screen;
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Window win;
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GC gc;
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/* here are our X routines declared! */
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void init_x();
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void close_x();
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void redraw();
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int delay(int i);
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};
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#endif
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/*** END MAIN.H ***/
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/*** START MAIN.CPP ***/
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// modified from Brian Hammond's Howdy program at
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// http://www.insanityengine.com/doc/x11/xintro.html
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// jeff louie 02.05.2004
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int main (int argc, char * const argv[]) {
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Main m(argc, argv);
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return 0;
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}
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//Main::~Main() {;};
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Main::Main (int argc, char * const argv[]) {
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XEvent event; // XEvent declaration
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KeySym key; // KeyPress Events
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char text[255]; // char buffer for KeyPress Events
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init_x();
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// event loop
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while(1) {
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// get the next event and stuff it into our event variable.
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// Note: only events we set the mask for are detected!
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XNextEvent(dis, &event);
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switch (event.type) {
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int x;
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int y;
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case Expose:
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if (event.xexpose.count==0) {
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redraw();
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}
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break;
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case KeyPress:
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if (XLookupString(&event.xkey,text,255,&key,0)==1) {
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// use the XLookupString routine to convert the invent
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// KeyPress data into regular text. Weird but necessary...
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if ((text[0]=='q') || (text[0]=='Q')) {
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close_x();
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}
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else {
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// echo key press
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printf("You pressed the %c key!\n",text[0]);
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}
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}
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break;
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case ButtonPress:
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// get cursor position
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x= event.xbutton.x;
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y= event.xbutton.y;
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strcpy(text,"X is FUN!");
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XSetForeground(dis,gc,rand()%event.xbutton.x%255);
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// draw text at cursor
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XDrawString(dis,win,gc,x,y, text, strlen(text));
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break;
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default:
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printf("Unhandled event.\n");
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}
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}
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}
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void Main::init_x() {
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unsigned long black,white;
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dis=XOpenDisplay(NULL);
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screen=DefaultScreen(dis);
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black=BlackPixel(dis,screen),
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white=WhitePixel(dis, screen);
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win=XCreateSimpleWindow(dis,DefaultRootWindow(dis),0,0,
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300, 300, 5,black, white);
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XSetStandardProperties(dis,win,"Hello World","Hi",None,NULL,0,NULL);
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XSelectInput(dis, win, ExposureMask|ButtonPressMask|KeyPressMask);
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// get Graphics Context
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gc=XCreateGC(dis, win, 0,0);
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XSetBackground(dis,gc,white);
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XSetForeground(dis,gc,black);
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XClearWindow(dis, win);
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XMapRaised(dis, win);
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};
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void Main::close_x() {
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XFreeGC(dis, gc);
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XDestroyWindow(dis,win);
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XCloseDisplay(dis);
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exit(1);
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};
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void Main::redraw() {
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XClearWindow(dis, win);
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};
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