vrover
/*
** vrover applet **
(c) 1997 Vitas Ramanchauskas, vitas@webdon.com, http://webdon.com, ICQ:3024702
You may use this applet freely.
All I ask is that you add a link to my home page: http://webdon.com,
if possible.
html tag: <a href="http://webdon.com">Vitas' site</a>
...or take my funny banner ;-)
About me.
> 28 y.o. software developer.
> Applications, DLLs, Drivers (including VxDs), ActiveX controls,
utilities, libraries.. ..for Windows 95/NT, Win 3.x, DOS
> C++, Java, Forth, Assembler (including Pentium features,
virtual & protected modes, MMX.. ..as well as antique PDP-11 & i8080)
> Win32 SDK, DDK, Video for Windows SDK, OLE, ActiveX (including controls),
COM, MFC, ATL, Image processing, Multimedia, Internet programming (HTML,
CGI,ISAPI,Java,...), security & cryptography ...more!
> Deep knowledge of system internals
> Skilled in mathematics, physics & digital electronics
*/
import java.applet.*;
import java.awt.*;
import java.net.*;
public class vrover3 extends Applet implements Runnable
{
private int butCnt = 0; // buttons number
private boolean horiStyle = false; // true if horizontal layout
private int activeIndex = -1; // current button index
private Thread m_vrover = null;
private Graphics m_Graphics;
private Image m_Images[];
private int m_nImgWidth = 0;
private int m_nImgHeight = 0;
private boolean m_fAllLoaded = false;
private final int NUM_IMAGES = 4;
private String m_url[] = new String[50];
private String m_text[] = new String[50];
private String m_frame[] = new String[50];
private Color m_fgColor = new Color(255,255,40);
private Color m_bkColor = new Color(135,170,180);
private int w = 80, h = 32;
private final String PARAM_url = "url";
private final String PARAM_frame = "frame";
private final String PARAM_text = "text";
private final String PARAM_bkColor = "bkColor";
private final String PARAM_fgColor = "fgColor";
private final String PARAM_w = "w";
private final String PARAM_h = "h";
private final String PARAM_style = "style";
public vrover3()
{
m_url[0] = "index.htm";
m_text[0] = "Pressme";
m_frame[0] = "_self";
}
public String getAppletInfo()
{
return "Name: vrover\r\n" +
"Author: Vitas Ramanchauskas\r\n" +
"Created solely";
}
public String[][] getParameterInfo()
{
String[][] info =
{
{ PARAM_url, "String", "HREF" },
{ PARAM_frame, "String", "Target frame" },
{ PARAM_w, "Integer", "button width" },
{ PARAM_h, "Integer", "button height" },
{ PARAM_bkColor, "Integer", "Background Color" },
{ PARAM_fgColor, "Integer", "Foreground Color" },
{ PARAM_text, "String", "Text to be displayed" },
{ PARAM_style, "Integer", "Style" },
};
return info;
}
private int parse(String dst[], String src)
{
int x=0, i=0;
while(true)
{
int n = src.indexOf(',', x);
if(n==-1)
{
dst[i] = src.substring(x);
break;
}
else
dst[i] = src.substring(x, n);
dst[i] = dst[i].trim();
x = n+1;
i++;
}
return i+1;
}
public void init()
{
String param;
param = getParameter(PARAM_url);
if (param != null)
parse(m_url, param);
param = getParameter(PARAM_bkColor);
if (param != null)
{
m_bkColor = new Color(Integer.parseInt(param));
setBackground(m_bkColor);
}
param = getParameter(PARAM_fgColor);
if (param != null)
m_fgColor = new Color(Integer.parseInt(param));
param = getParameter(PARAM_text);
if (param != null)
butCnt = parse(m_text, param);
param = getParameter(PARAM_frame);
if (param != null)
parse(m_frame, param);
param = getParameter(PARAM_w);
if (param != null)
w = Integer.parseInt(param);
param = getParameter(PARAM_h);
if (param != null)
h = Integer.parseInt(param);
param = getParameter(PARAM_style);
if (param != null)
horiStyle = (Integer.parseInt(param)==1);
}
private void displayImage(Graphics g, int n, int phase)
{
if (!m_fAllLoaded)
return;
if(horiStyle)
g.drawImage(m_Images[phase],
w*n+5, (h - m_nImgHeight) / 2, null);
else
g.drawImage(m_Images[phase],
5, n*h+(h - m_nImgHeight) / 2, null);
}
private void draw1(Graphics g, int n)
{
Rectangle r;
if(horiStyle)
r = new Rectangle(w*n,0,w,h);
else
r = new Rectangle(0,n*h,w,h);
if (m_fAllLoaded)
{
g.clearRect(r.x, r.y, r.width, r.height);
g.setColor(new Color(192,192,192));
g.drawLine(r.x, r.y, r.x+r.width-2, r.y);
g.drawLine(r.x, r.y, r.x, r.y+r.height-2);
g.setColor(new Color(120,120,120));
g.drawLine(r.x+r.width-2, r.y+1, r.x+r.width-2, r.y+r.height-2);
g.drawLine(r.x+1, r.y+r.height-2, r.x+r.width-2, r.y+r.height-2);
g.setColor(new Color(0,0,0));
g.drawLine(r.x+r.width-1, r.y, r.x+r.width-1, r.y+r.height-1);
g.drawLine(r.x, r.y+r.height-1, r.x+r.width-1, r.y+r.height-1);
displayImage(g, n, 0); // always in base (dark) state
}
g.setColor(m_fgColor);
g.drawString(m_text[n], r.x+25, r.y+r.height/2 +
g.getFontMetrics().getAscent()/2);
}
public void paint(Graphics g)
{
for(int i=0; i<butCnt; i++)
draw1(g, i);
}
public void start()
{
setBackground(m_bkColor);
if (m_vrover == null)
{
m_vrover = new Thread(this);
m_vrover.start();
}
}
public void stop()
{
if (m_vrover != null)
{
m_vrover.stop();
m_vrover = null;
}
}
public void run()
{
if (!m_fAllLoaded)
{
m_Graphics = getGraphics();
repaint();
m_Images = new Image[NUM_IMAGES];
MediaTracker tracker = new MediaTracker(this);
String strImage;
for (int i = 1; i <= NUM_IMAGES; i++)
{
strImage = "phase" + i + ".gif";
m_Images[i-1] = getImage(getCodeBase(), strImage);
tracker.addImage(m_Images[i-1], 0);
}
try
{
tracker.waitForAll();
m_fAllLoaded = !tracker.isErrorAny();
}
catch (InterruptedException e)
{
}
if (!m_fAllLoaded)
{
stop();
m_Graphics.drawString("Error loading images!", 10, 40);
return;
}
// Assuming all images are same width and height.
m_nImgWidth = m_Images[0].getWidth(this);
m_nImgHeight = m_Images[0].getHeight(this);
}
repaint();
// Yeah! You've found it! I want to know where my applet is used
// Follow code (you'll remove it of course ;) ) tries to open
// non-existent image at webdon.com...
// ...and I'll see this request in my log...
// It is possible to do applet copy-protection...
MediaTracker trk = new MediaTracker(this);
try
{trk.addImage(getImage(new URL("http://webdon.com/vrover3.gif")),0);
try
{ trk.waitForAll(4444); }
catch (InterruptedException e)
{}
}
catch (MalformedURLException e)
{}
}
// converts (x,y) coordinate to Active Index (index of current button)
private int xy2ai(int x, int y)
{
return horiStyle? x/w:y/h;
}
private void validateAI(int x, int y)
{
if(xy2ai(x,y) != activeIndex && m_fAllLoaded)
{
if(activeIndex!=-1)
{
// turn off previous button indicator
displayImage(m_Graphics, activeIndex, 0);
}
// hilight new one
activeIndex = xy2ai(x,y);
displayImage(m_Graphics, activeIndex, 1);
}
}
public boolean mouseDown(Event evt, int x, int y)
{
if(m_fAllLoaded)
{
// fade in
validateAI(x, y);
displayImage(m_Graphics, xy2ai(x,y), 2);
try{
Thread.sleep(60);
}
catch (InterruptedException e)
{}
displayImage(m_Graphics, xy2ai(x,y), 3);
try{
Thread.sleep(60);
}
catch (InterruptedException e)
{}
}
return true;
}
public boolean mouseUp(Event evt, int x, int y)
{
if(activeIndex==-1)
return true;
// fade out
validateAI(x, y);
displayImage(m_Graphics, xy2ai(x,y), 2);
try
{
Thread.sleep(60);
}
catch (InterruptedException e)
{
;
}
displayImage(m_Graphics, xy2ai(x,y), 1);
// jump through hyperlink
URL theUrl;
try {
theUrl = new URL(getDocumentBase(), m_url[activeIndex]);
getAppletContext().showDocument(theUrl,
(m_frame[activeIndex]==null)? "_self":m_frame[activeIndex]);
}
catch (MalformedURLException e)
{
}
return true;
}
public boolean mouseEnter(Event evt, int x, int y)
{
if(m_fAllLoaded)
{
activeIndex = xy2ai(x,y);
displayImage(m_Graphics, activeIndex, 1);
}
return true;
}
public boolean mouseMove(Event evt, int x, int y)
{
validateAI(x,y);
return true;
}
public boolean mouseExit(Event evt, int x, int y)
{
if(m_fAllLoaded)
{
displayImage(m_Graphics, activeIndex, 0);
activeIndex = -1;
}
return true;
}
}
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