/**
* Calling this method pauses the plot and displays a flashing message on the screen. Mainly used
* when data is being loaded across the net. Everytime this routine is called a counter is
* incremented the method Graph2D.finishedloading() decrements the counter. When the counter is
* back to zero the plotting resumes.
*
* @see Graph2D#finishedloading()
* @see Graph2D#loadmessage()
* @see LoadMessage
*/
public void startedloading() {
loadingData++;
if (loadingData != 1) return;
if (load_thread == null) load_thread = new LoadMessage(this);
load_thread.setFont(new Font("Helvetica", Font.PLAIN, 25));
load_thread.begin();
}
/**
* Decrement the loading Data counter by one. When it is zero resume plotting.
*
* @see Graph2D#startedloading()
* @see Graph2D#loadmessage()
* @see LoadMessage
*/
public void finishedloading() {
loadingData--;
if (loadingData > 0) return;
if (load_thread != null) load_thread.end();
load_thread = null;
}
/**
* Change the message to be flashed on the canvas
*
* @param s String contining the new message.
* @see Graph2D#startedloading()
* @see Graph2D#finishedloading()
* @see LoadMessage
*/
public void loadmessage(String s) {
if (load_thread == null) load_thread = new LoadMessage(this);
load_thread.setMessage(s);
}