java - Confusion between mouseEntered() and mouseMoved() - 


import java.awt.*; import java.applet.*; import java.awt.event.*;  public class mouseevents extends applet implements mouselistener, mousemotionlistener {     string msg = "";                        // not implementing methods     int mousex = 0, mousey = 0;             // not related question      public void init()     {         addmouselistener(this);         addmousemotionlistener(this);     }      public void mouseentered(mouseevent me)     {         mousex = 0;         mousey = 10;         msg = "mouse entered";         repaint();     }      public void mousemoved(mouseevent me)     {         mousex = me.getx();         mousey = me.gety();         showstatus("moving mouse @ "+mousex+", "+mousey);     }      public void paint(graphics g)     {         g.drawstring(msg, mousex, mousey);     } }

coordinates of applet window:

upper left corner - (0, 0)
lower left corner - (0, 199)
upper right corner - (349, 0)
lower right corner - (349, 199)

what expect:

  1. when mouse enter applet window, message "mouse entered" should displayed @ coordinates (0, 10)

  2. when mouse moving, message "moving mouse @ mousex, mousey" should displayed in status window. mousex , mousey current coordinates of mouse

what happening:

the message "mouse entered" not being displayed @ coordinates (0, 10), instead getting displayed @ initial coordinates mouse enteres applet window***

for example, mouse enters applet window between lower left corner , lower right corner, (187, 199), message "mouse entered", instead of getting displayed @ (0, 10), getting displayed @ (187, 199)

my question

in spite of specifying mousex = 0 , mousey = 10 in mouseentered(), why message "mouse entered" getting displayed @ coordinates mouse enters applet window, not @ coordinates (0, 10)?

the viewing pane gets redrawn move mouse on it.

you overwriting values of mousex , mousey here:

public void mousemoved(mouseevent me) {     mousex = me.getx();     mousey = me.gety();     showstatus("moving mouse @ "+mousex+", "+mousey); }

this causes redrawing occur @ coordinates when move mouse. if want mouseentered not move, can use local variable, e.g.

public void mousemoved(mouseevent me) {     int currentmousex = me.getx();     int currentmousey = me.gety();     showstatus("moving mouse @ "+currentmousex+", "+currentmousey); }

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