Total newbie
Okay, jeg ved godt, at det her med sikkerhed lyder vildt lam, MEN... er der een, der kan hjælpe med følgende:Jeg har fået fat i en NewsTicker, der NÆSTEN fungerer, som jeg har brug for. Uheldigvis kan den ikke klare at hente sine data eksternt - og det har jeg brug for.
Når jeg skal køre applet\'en skal jeg bl.a. definere følgende:
code=NewsTicker.class - den vil jeg gerne kunne definere med en URL (eks. http://www.test.dk/newsticker.class
<param name=newsfile value=\"news.txt\"> - den vil jeg ligeledes gerne kunne definere med en URL.
<param name=background value=\"top.gif\"> - det samme gør sig gældende her.
En test af NewsTickeren, hvor den bruger lokale filer kan ses her: http://www.movieboxen.dk/nyheder/test.html
Nedenfor er den ucompilede java-fil.
Håber der er een, der kan hjælpe.
//******************************************************************************
// NewsTicker.java: Applet
//
//******************************************************************************
import java.applet.*;
import java.awt.*;
import java.util.*;
import java.net.*;
import java.io.*;
//==============================================================================
// Main Class for applet NewsTicker
//
//==============================================================================
public class NewsTicker extends bApplet implements Runnable
{
// General data members
//--------------------------------------------------------------------------
private Vector m_headers = new Vector();
private Vector m_urls = new Vector();
private int m_sel = -1;
private int m_headerCount = 0;
private int m_currHeader = 0;
private Thread m_thread;
private Image m_imgBuffer = null;
private int m_scrollPos = 14;
private boolean m_over = false;
private boolean m_pause = false;
private int m_cursory;
private boolean m_activatepause = false;
private boolean m_firstrender = true;
// PARAMETER SUPPORT:
// Parameters allow an HTML author to pass information to the applet;
// the HTML author specifies them using the <PARAM> tag within the <APPLET>
// tag. The following variables are used to store the values of the
// parameters.
//--------------------------------------------------------------------------
// Members for applet parameters
// <type> <MemberVar> = <Default Value>
//--------------------------------------------------------------------------
private String m_newsfile = \"news.txt\";
private int m_x = 0;
private int m_y = 0;
private int m_cx = 0;
private int m_cy = 0;
private String m_background = \"\";
private Color m_bgcolor;
private Color m_textcolor;
private Color m_hilitecolor;
private String m_frame = null;
// Parameter names. To change a name of a parameter, you need only make
// a single change. Simply modify the value of the parameter string below.
//--------------------------------------------------------------------------
private final String PARAM_newsfile = \"newsfile\";
private final String PARAM_x = \"x\";
private final String PARAM_y = \"y\";
private final String PARAM_cx = \"cx\";
private final String PARAM_cy = \"cy\";
private final String PARAM_background = \"background\";
private final String PARAM_bgcolor = \"bgcolor\";
private final String PARAM_textcolor = \"textcolor\";
private final String PARAM_hilitecolor = \"hilitecolor\";
private final String PARAM_frame = \"frame\";
private final String PARAM_pause = \"pause\";
// Variables.
//--------------------------------------------------------------------------
private Image m_imgBackground;
private Font m_font;
// NewsTicker Class Constructor
//--------------------------------------------------------------------------
public NewsTicker()
{
m_font = new Font(\"Helvetica\", Font.PLAIN, 11);
}
// APPLET INFO SUPPORT:
// The getAppletInfo() method returns a string describing the applet\'s
// author, copyright date, or miscellaneous information.
//--------------------------------------------------------------------------
public String getAppletInfo()
{
return \"Name: NewsTicker\\r\\n\" +
\"Author: John Mannix\\r\\n\" +
\"Created with Microsoft Visual J++ Version 1.1\";
}
// PARAMETER SUPPORT
// The getParameterInfo() method returns an array of strings describing
// the parameters understood by this applet.
//
// NewsTicker Parameter Information:
// { \"Name\", \"Type\", \"Description\" },
//--------------------------------------------------------------------------
public String[][] getParameterInfo()
{
String[][] info =
{
{ PARAM_newsfile, \"String\", \"News text file\" },
{ PARAM_x, \"int\", \"X position of news view\" },
{ PARAM_y, \"int\", \"Y position of news view\" },
{ PARAM_cx, \"int\", \"Width of news view\" },
{ PARAM_cy, \"int\", \"Height of news view\" },
{ PARAM_background, \"String\", \"Background image URL\" },
{ PARAM_bgcolor, \"String\", \"Background colour \'R,G,B\'\" },
{ PARAM_textcolor, \"String\", \"Text colour \'R,G,B\'\" },
{ PARAM_hilitecolor, \"String\", \"Highlight colour \'R,G,B\'\" },
{ PARAM_frame, \"String\", \"Frame used to launch URLs\" },
{ PARAM_pause, \"String\", \"Whether to activate pause\" }
};
return info;
}
// The init() method is called by the AWT when an applet is first loaded or
// reloaded. Override this method to perform whatever initialization your
// applet needs, such as initializing data structures, loading images or
// fonts, creating frame windows, setting the layout manager, or adding UI
// components.
//--------------------------------------------------------------------------
public void init()
{
// PARAMETER SUPPORT
// The following code retrieves the value of each parameter
// specified with the <PARAM> tag and stores it in a member
// variable.
//----------------------------------------------------------------------
String param;
// newsfile: News text file
//----------------------------------------------------------------------
param = getParameter(PARAM_newsfile);
if (param != null)
m_newsfile = param;
// x: X position of news view
//----------------------------------------------------------------------
param = getParameter(PARAM_x);
if (param != null)
m_x = Integer.parseInt(param);
// y: Y position of news view
//----------------------------------------------------------------------
param = getParameter(PARAM_y);
if (param != null)
m_y = Integer.parseInt(param);
// cx: Width of news view
//----------------------------------------------------------------------
param = getParameter(PARAM_cx);
if (param != null)
m_cx = Integer.parseInt(param);
// cy: Height of news view
//----------------------------------------------------------------------
param = getParameter(PARAM_cy);
if (param != null)
m_cy = Integer.parseInt(param);
// background: Background image URL
//----------------------------------------------------------------------
param = getParameter(PARAM_background);
if (param != null)
m_background = param;
// pause: Whether to activate pause
//----------------------------------------------------------------------
param = getParameter(PARAM_pause);
if (param != null)
{
m_activatepause = true;
m_scrollPos += m_y + m_cy;
}
// bgcolor: Background colour
//----------------------------------------------------------------------
StringTokenizer t;
String bgcolor = getParameter(PARAM_bgcolor);
if (bgcolor != null)
{
t = new StringTokenizer(bgcolor, \",\");
m_bgcolor = new Color(Integer.parseInt(t.nextToken()),
Integer.parseInt(t.nextToken()),
Integer.parseInt(t.nextToken()));
setBackground(m_bgcolor);
}
// textcolor: Text colour
//----------------------------------------------------------------------
String textcolor = getParameter(PARAM_textcolor);
if (textcolor != null)
{
t = new StringTokenizer(textcolor, \",\");
m_textcolor = new Color(Integer.parseInt(t.nextToken()),
Integer.parseInt(t.nextToken()),
Integer.parseInt(t.nextToken()));
}
else
m_textcolor = Color.black;
// hilitecolor: Highlight colour
//----------------------------------------------------------------------
textcolor = getParameter(PARAM_textcolor);
if (textcolor != null)
{
t = new StringTokenizer(textcolor, \",\");
m_hilitecolor = new Color(Integer.parseInt(t.nextToken()),
Integer.parseInt(t.nextToken()),
Integer.parseInt(t.nextToken()));
}
else
m_hilitecolor = Color.red;
// frame: Frame used to launch URLs
//----------------------------------------------------------------------
m_frame = getParameter(PARAM_frame);
// Load the background image and prepare it
//----------------------------------------------------------------------
m_imgBackground = getImage(getDocumentBase(), m_background);
prepareImage(m_imgBackground, this);
// Read the news file into an array
//----------------------------------------------------------------------
readNewsFile();
}
// Place additional applet clean up code here. destroy() is called when
// when you applet is terminating and being unloaded.
//-------------------------------------------------------------------------
public void destroy()
{
}
// NewsTicker Paint Handler
//--------------------------------------------------------------------------
public void paint(Graphics g)
{
if (m_imgBuffer == null)
{
m_imgBuffer = createImage(size().width, size().height);
render();
}
g.drawImage(m_imgBuffer, 0, 0, null);
}
public void render()
{
if (m_imgBuffer != null)
{
Graphics g = m_imgBuffer.getGraphics();
g.setColor(m_bgcolor);
g.fillRect(0, 0, size().width, size().height);
g.drawImage(m_imgBackground, 0, 0, this);
g.clipRect(m_x, m_y, m_cx, m_cy);
g.translate(0, m_scrollPos);
g.setColor(m_textcolor);
g.setFont(m_font);
String line;
int y = m_y, i;
m_pause = false;
boolean reset = false;
m_sel = -1;
while (y + m_scrollPos < m_y + m_cy + 34)
{
for (i = 0; i < m_headerCount; i++)
{
if (m_over)
{
line = (String)m_headers.elementAt(i);
int height = 0, index = 0;
while (line.indexOf(\'|\', index) > 0)
{
height+=14;
index = line.indexOf(\'|\', index)+1;
}
if (m_cursory+14 > y+m_scrollPos && m_cursory < y+height+m_scrollPos)
{
m_sel = i;
g.setColor(m_hilitecolor);
}
}
if (y + m_scrollPos == m_y + 14) m_pause = true;
StringTokenizer t = new StringTokenizer((String)m_headers.elementAt(i), \"|\");
while (t.hasMoreTokens())
{
line = t.nextToken();
g.drawString(line, m_x, y);
y += 14;
}
y += 24;
g.setColor(m_textcolor);
}
if (y + m_scrollPos < m_y) reset = true;
}
if (reset) m_scrollPos = 0;
}
}
public void update(Graphics g)
{
render();
paint(g);
}
// The start() method is called when the page containing the applet
// first appears on the screen. The AppletWizard\'s initial implementation
// of this method starts execution of the applet\'s thread.
//--------------------------------------------------------------------------
public void start()
{
m_thread = new Thread(this);
m_thread.start();
}
// The stop() method is called when the page containing the applet is
// no longer on the screen. The AppletWizard\'s initial implementation of
// this method stops execution of the applet\'s thread.
//--------------------------------------------------------------------------
public void stop()
{
m_thread.stop();
}
// The run() method is called when by m_thread and implements the
// header animations between the display of each news item.
//--------------------------------------------------------------------------
public void run()
{
try
{
while (true)
{
if (m_pause && m_activatepause) m_thread.sleep(4000);
else if (m_activatepause) m_thread.sleep(20);
else m_thread.sleep(100);
//m_currHeader = (m_currHeader+1) % m_headerCount;
m_scrollPos--;
repaint();
}
}
catch (InterruptedException e)
{
}
}
// MOUSE SUPPORT:
// The mouseDown() method is called if the mouse button is pressed
// while the mouse cursor is over the applet\'s portion of the screen.
//--------------------------------------------------------------------------
public boolean mouseDown(Event evt, int x, int y)
{
if (m_sel >= 0 && m_sel < m_headerCount)
{
if (m_frame == null)
getAppletContext().showDocument((URL)m_urls.elementAt(m_sel));
else
getAppletContext().showDocument((URL)m_urls.elementAt(m_sel), m_frame);
}
return true;
}
// MOUSE SUPPORT:
// The mouseUp() method is called if the mouse button is released
// while the mouse cursor is over the applet\'s portion of the screen.
//--------------------------------------------------------------------------
public boolean mouseUp(Event evt, int x, int y)
{
return true;
}
public boolean mouseEnter(Event evt, int x, int y)
{
stop();
m_over = true;
m_cursory = y;
repaint();
return true;
}
public boolean mouseExit(Event evt, int x, int y)
{
start();
m_over = false;
m_cursory = y;
repaint();
return true;
}
public boolean mouseMove(Event evt, int x, int y)
{
m_cursory = y;
repaint();
return true;
}
// Read the news file into m_headers, one line per entry.
//-------------------------------------------------------------------------
private void readNewsFile()
{
String line;
int count = 0;
try
{
URL url = new URL(getCodeBase(), m_newsfile);
try
{
DataInputStream in = new DataInputStream(url.openStream());
do
{
line = in.readLine();
if (line != null)
{
StringTokenizer t = new StringTokenizer(line, \"~\");
m_headers.addElement(t.nextToken());
if (t.hasMoreTokens())
m_urls.addElement(new URL(getDocumentBase(), t.nextToken()));
m_headerCount++;
}
} while (line != null);
}
catch (IOException e)
{
}
}
catch (MalformedURLException e)
{
System.err.println(\"Could not open news feed file.\");
}
}
}
