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/*
* Copyright (c) 2002 Alban G. Hertroys
*
* Basic example of libDockapp usage
*
* This dockapp will draw a rectangle with a
* bouncing ball in it.
*/
/* also includes Xlib, Xresources, XPM, stdlib and stdio */
#include <libdockapp/dockapp.h>
#include <time.h>
/* include the pixmap to use */
#include "ball_red.xpm"
#define SPEED 20
#define MAX_MOVE 4
/*
* Prototypes for local functions
*/
void drawRelief(Pixmap pixmap);
void moveBall(void);
void destroy(void);
/*
* Global variables
*/
Window ballWin;
DAShapedPixmap *ballPix;
/*
* M A I N
*/
int
main(int argc, char **argv)
{
unsigned int x = 1, y = 1;
Pixmap back;
DACallbacks eventCallbacks = {
destroy, /* destroy */
NULL, /* buttonPress */
NULL, /* buttonRelease */
NULL, /* motion (mouse) */
NULL, /* mouse enters window */
NULL, /* mouse leaves window */
moveBall /* timeout */
};
/* provide standard command-line options */
DAParseArguments(
argc, argv, /* Where the options come from */
NULL, 0, /* Our list with options - none as you can see */
"This is the help text for the basic example of how to "
"use libDockapp.\n",
"Basic example version 1.1");
/* Tell libdockapp what version we expect it to be (a date from
* NEWS should do).
*/
DASetExpectedVersion(20020126);
DAOpenDisplay(
NULL /* default display */,
argc, argv /* needed by libdockapp */
);
DACreateIcon(
"daBasicExample" /* WM_CLASS hint; don't use chars in [.?*: ] */,
48, 48 /* geometry of dockapp internals */,
argc, argv /* needed by libdockapp */
);
/* The pixmap that makes up the background of the dockapp */
back = DAMakePixmap();
drawRelief(back);
DASetPixmap(back);
XFreePixmap(DADisplay, back);
/* A window(!) for the ball pixmap.
* Moving a window is a lot easier then erasing/copying the pixmap all
* the time.
*
* I use a DAShapedPixmap here, which contains all the information
* related to the pixmap: pixmap, mask and geometry.
*/
ballPix = DAMakeShapedPixmapFromData(ball_red_xpm);
ballWin = XCreateSimpleWindow(DADisplay, DAWindow,
x, y,
/* Use the geometry of the shaped pixmap */
ballPix->geometry.width, ballPix->geometry.height,
0, 0, 0);
DASPSetPixmapForWindow(ballWin, ballPix);
/* Respond to destroy and timeout events (the ones not NULL in the
* eventCallbacks variable.
*/
DASetCallbacks(&eventCallbacks);
/* Set the time for timeout events (in msec) */
DASetTimeout(SPEED);
/* Randomize movement variation.
* Run multiple versions of the dockapp simultaneously to see the effect
* best.
* (which function to use is set from the Imakefile)
*/
#ifdef HAS_RANDOMDEV
srandomdev();
#else
srandom(time(NULL));
#endif
DAShow(); /* Show the dockapp window. */
/* Process events and keep the dockapp running */
DAEventLoop();
/* not reached */
exit(EXIT_SUCCESS);
}
void
drawRelief(Pixmap pixmap)
{
XGCValues gcv;
GC lightGrayGC, darkGrayGC;
/* GC's */
gcv.foreground = DAGetColor("Navy");
XChangeGC(DADisplay, DAClearGC, GCForeground, &gcv);
gcv.foreground = DAGetColor("lightGray");
gcv.graphics_exposures = False;
lightGrayGC = XCreateGC(DADisplay, DAWindow,
GCForeground | GCGraphicsExposures, &gcv);
gcv.foreground = DAGetColor("#222222");
darkGrayGC = XCreateGC(DADisplay, DAWindow,
GCForeground | GCGraphicsExposures, &gcv);
/* Drawing */
XFillRectangle(DADisplay, pixmap, DAClearGC, 1, 1, 46, 46);
XDrawLine(DADisplay, pixmap, darkGrayGC, 0, 0, 0, 46);
XDrawLine(DADisplay, pixmap, darkGrayGC, 1, 0, 47, 0);
XDrawLine(DADisplay, pixmap, lightGrayGC, 0, 47, 47, 47);
XDrawLine(DADisplay, pixmap, lightGrayGC, 47, 1, 47, 46);
/* Free the GC's, we don't use them anymore */
XFreeGC(DADisplay, lightGrayGC);
XFreeGC(DADisplay, darkGrayGC);
}
void
moveBall(void)
{
static int x = 1;
static int y = 1;
static int dx;
static int dy;
signed int var = random() % 3 - 1;
if (dx == 0)
dx = var;
if (dy == 0)
dy = var;
if (dx > MAX_MOVE)
dx = MAX_MOVE;
if (dy > MAX_MOVE)
dy = MAX_MOVE;
/* calculate new position */
x += dx;
y += dy;
if (x < 1) {
x = 1;
dx = -dx + var;
}
if (y < 1) {
y = 1;
dy = -dy + var;
}
if (x + ballPix->geometry.width > 46) {
x = 46 - ballPix->geometry.width;
dx = -dx + var;
}
if (y + ballPix->geometry.height > 46) {
y = 46 - ballPix->geometry.height;
dy = -dy + var;
}
XMoveWindow(DADisplay, ballWin, x, y);
}
void
destroy(void)
{
XFreePixmap(DADisplay, ballPix->pixmap);
XFreePixmap(DADisplay, ballPix->shape);
fprintf(stderr, "Destroyed!\n");
/* exit is done by libdockapp */
}
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