java - Printing out text when space bar is pressed -


this example of taking place main program. want call method when spacebar pressed want call method example wrote prints out text , changes boolean value isn't working. not sure doing causing not work.

import java.awt.flowlayout; import java.awt.event.keyevent; import java.awt.event.keylistener;  import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import javax.swing.jtextfield;  public class test implements keylistener {      static boolean spacedpressed = false;     static jtextfield text = new jtextfield();     public static void main(string s[]) {          jframe frame = new jframe("jframe test");          jpanel panel = new jpanel();         panel.setlayout(new flowlayout());          jlabel label = new jlabel("test label");          jbutton button = new jbutton();         button.settext("press me");            panel.add(label);         panel.add(button);           frame.add(panel);         frame.setsize(300, 300);         frame.setlocationrelativeto(null);         frame.setdefaultcloseoperation(jframe.exit_on_close);         frame.setvisible(true);          if(button.getmodel().ispressed()){             system.out.println("pressed");             panel.add(text);             system.out.println(spacedpressed);         }     }      @override     public void keypressed(keyevent e) {         if(e.getkeycode() == keyevent.vk_space){             system.out.println("pressed");             spacedpressed = true;             text.settext("press worked.");         } else {             system.out.println("not pressed");             text.settext("press didn't work.");             spacedpressed = false;         }     }      @override     public void keyreleased(keyevent e) {         // todo auto-generated method stub      }      @override     public void keytyped(keyevent e) {         // todo auto-generated method stub      } }

so here modified code print key events (i removed button panel, not catching space key events):

public class test_1 implements keylistener {  static boolean spacedpressed = false; static jtextfield text = new jtextfield();  public static void main(string s[]) {      jframe frame = new jframe("jframe test");      jpanel panel = new jpanel();     panel.setlayout(new flowlayout());      jlabel label = new jlabel("test label");      jbutton button = new jbutton();     button.settext("press me");     frame.addkeylistener(new test_1());      panel.add(label);     //      panel.add(button);      frame.add(panel);     frame.setsize(300, 300);     frame.setlocationrelativeto(null);     frame.setdefaultcloseoperation(jframe.exit_on_close);     frame.setvisible(true);      if (button.getmodel().ispressed()) {         system.out.println("pressed");         panel.add(text);         system.out.println(spacedpressed);     } }  @override public void keypressed(keyevent e) {     if (e.getkeycode() == keyevent.vk_space) {         system.out.println("pressed");         spacedpressed = true;         text.settext("press worked.");     } else {         system.out.println("not pressed");         text.settext("press didn't work.");         spacedpressed = false;     } }  @override public void keyreleased(keyevent e) {     system.out.println("released"); }  @override public void keytyped(keyevent e) {     system.out.println("typed"); } }

and sample output on pressing space key on jframe:

pressed typed released

Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more