Event handling with buttons and mouse

Hi, Im a beginner in Java...!!!
I have 4 buttons with me- 2 for color(red,blue) and 2 for size(big,small)..
How do we divide the frame into 2 panels..one for Buttons and Other for Mouse events...
Now,if I click on RED button and BIG button..and later click in the Mouse Panel area..I shud get a big rectangle filled with red color..and similarly for small / blue..etc...if a new selection is made..the previous rectangles should remain as they are...
Im unable to get the implementation...any help will be appreciated.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class ButtonPanel extends JPanel
implements ActionListener, MouseMotionListener
{ public ButtonPanel()
blueButton = new JButton("Blue");
redButton = new JButton("Red");
bigButton = new JButton("Big");
smallButton = new JButton("small");
add(blueButton);
add(redButton);
add(bigButton);
add(smallButton);
blueButton.addActionListener(this);
redButton.addActionListener(this);
bigButton.addActionListener(this);
smallButton.addActionListener(this);
public void actionPerformed(ActionEvent evt)
Color color = getBackground();
repaint();
// Paint Method
public void paintComponent(Graphics g)
{ super.paintComponent(g);
class ButtonFrame extends JFrame
{ public ButtonFrame()
{ setTitle("ButtonTest");
setSize(300, 200);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
Container contentPane = getContentPane();
contentPane.add(new ButtonPanel());
public class ButtonTest
{ public static void main(String[] args)
{ JFrame frame = new ButtonFrame();
frame.show();
}

can U kindly code it for me....!!!you're getting closer,
http://saloon.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=2&t=011033but rent-a-coder is that way ---->

Similar Messages

Event handling with button

Hi All,
I am trying to write an event handling on my button, but i seem dont know where to start from. My code are below:
import java.net.*;
import java.io.*;
public class ReadWrite
public static void main(String[] args) throws Exception {
URL myLocalhost = new URL("http://localhost/Write.pl");
URLConnection myURL = myLocalhost.openConnection();
BufferedReader myBR = new BufferedReader(
new InputStreamReader(
myURL.getInputStream()));
String inputLine;
while ((inputLine = myBR.readLine()) != null)
System.out.println(inputLine);
myBR.close();
I want to write a code with a button to run the above code.
Could you please advise?
Thank for any consideration you may give me.

here's the code to read a file, modify for your url connection
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
class Testing extends JFrame implements ActionListener
public Testing()
    setLocation(400,300);
    setSize(200,100);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel panel = new JPanel();
    JButton btn = new JButton("Read/Write");
    btn.addActionListener(this);
    panel.add(btn);
    getContentPane().add(panel);
public void actionPerformed(ActionEvent ae)
    BufferedReader myBR = null;
    try
      myBR = new BufferedReader(new FileReader("Test.txt"));
      String inputLine;
      while ((inputLine = myBR.readLine()) != null)
        System.out.println(inputLine);
      myBR.close();
    catch(Exception e){e.printStackTrace();}
public static void main(String args[]){new Testing().setVisible(true);}
}

Event handling with UIScrollView and it's subview

Hi,
I have a UIScrollView and inside it a UIImageView. I have a lot of difficulities to handle the events with these two views. Here is what I want to do:
If it is a multi-touch event (event.allTouches.count > 2), I want the UIScrollView to handle the event, i.e Zoom in/out and pan. If it a single touch event (event.allTouches.count == 1), I want the UIImageView to handle the event.
Could you please tell me how to do this?
Thank you very much.
ff

Take a look at the JSF Value-Changed Listener sections

870A Fuzion Power has problem with keyboard and mouse movement only in games.

Hey guys,
recently built a new system and chose to go with the 870A Fuzion Power mainboard, everything has gone very smoothly execpt for one problem, only when I play games like Crysis 2 ect the mouse seems to jolt around now and again and the keyboard decides to stop responding if I hold down the movement keys, and this is only in game not surfing the web for example. Now, I am using a wireless mouse and keyboard but I plugged in a PS/2 keyboard and the exact same thing happened. I've installed all of the drivers that came with this board and the drivers for the mouse and keyboard. Any of you guys ever had this sort of problem or know how to fix this?
Thanks.

I bought a new Macbook pro in june 2010, I didn't have any keyboard or mouse issues prior to upgrading to 10.6.4 supposedly this update was made to fix some issues with keyboard and mouse becoming unresponsive. For me the opposite happened. after the upgrade, my keyboard and mouse (trackpad) becomes sometimes partially unresponsive or totally unresponsive. the only way to solve the problem is by completely turning of the computer and turning back on.. granted it doesn't happen very often.. generally once every about 2-3 weeks but it is still annoying though..
I didn't have a chance to use the computer too much on the previous version (10.6.3) so I don't know if it is software related or hardware related.. any thoughts?
Message was edited by: msoued

I use iphone 3GS, after upgared to ios5, my phone restart when i took picture with button and while playing music .. what happened?

I use iphone 3GS, after upgraded to ios5, my phone restart when i took picture with button and while playing music .. what happened?

Basic troubleshooting steps in the following order.
1. Reset. Press and hold both Power and Home Buttons together till Apple Logo appears.
2. Restore to a backup.
3. Backup, Restore in iTunes and setup as new.

I have problems with buttons and Forms in my trial proof of Indesign CC, how can I fix it?

I have problems with buttons and Forms in my trial proof of Indesign CC, how can I fix it?

Moved to InDesign forum.
You can start by telling us what the problem is.

Help with buttons and AS3

I need urgent help for a college project, I've drawn a map and I have some photographs that appear on the map from the timeline one after another. I want the timeline to be activated when I press a Button On the map of where I've been on holiday but I have no Idea how to put it together.

While I can offer a couple ideas, you'll need to spend some time figuring out how to use Flash... maybe get some formal training with it.
For the photographs, create each set of them as a movieclip, and give each movieclip an instance name so that you can control its visibility using code. Initially you will want to set the visible property of them all to false, likely done in the first frame of the timeline (ex: imageGrp1.visible = false; ). Then you will use your buttons to make them visible.
To code one of the buttons, you need to assign it an instance name as well. Then you need to assign an event listener for that button to detect when it gets clicked, and an event handler function to go with the event listener... the listener calls the function into action when the event occurs.
ex:
// the event listener for a button with an instance name of imgGrp1Button...
imgGrp1Button.addEventListener(MouseEvent.CLICK, showGrp1);
// and the event handler function for the CLICK listener
function showGrp1(evt:MouseEvent):void {
imageGrp1.visible = true;
If you want to hide any visible set when you select a new one, then you can create a function that sets them all visible = false and call that function both at the start in frame 1 and in each button event handler function (before you set the selected set to be visible).

C# control event handling with javascript

How can I get javascript to execute for "onchange" / "OnSelectedIndexChanged" event instead of a CodeBehind method? I think "OnSelectedIndexChanged" event has to be handled by CodeBehind; but how can I replace that (or onchange) with
a javascript event handler?
I have the following in my xyz.ascx file:
<asp:DropDownList ID="ddlTypeCar" CssClass="BatsRefAddressTypes" runat="server"
                  onchange="javascript: testAlert();"
                  OnSelectedIndexChanged="ddlTypeCar_SelectedIndexChanged"
                  AutoPostBack="True" />
I could not get the javascript to execute, even though I removed OnSelectedIndexChanged="ddlTypeCar_SelectedIndexChanged" and/or set AutoPostBack="false".
Additionally, I tried added the following in xyz.ascx.cs Page_Load() method.
ddlTypeOfAddress.Attributes.Add("onchange", "javascript: testAlert();");
which didn't help.
Thanks for your help in advance.

Hi,
you can control client events instead of server events with javascript
look this url for more information
http://www.w3schools.com/js/js_events.asp
Regards

Registering event handler with preloader

As you can see from the code below, I have an application
with a custom preloader designated in the Application tag.
I would like the preloader to be able to receive a message
from my main application but in order to that I need to register a
method in the preloader as an event handler for an event fired by
my application and in order to do that I have to have a reference
to both the preloader and the application.
Where can I get a reference to both? this.preloader seems to
be null when the initialize() event is fired in my application and
mx.core.Application.application is null in my preloader. Is there
any way at all to do this?
I would GREATLY appreciate any help with this! I've been
struggling with this for hours :(
Thanks!
Moshe

Thank you Nayan..
BR
Aliye

Event Handling with Java API.: Adding to a hierarchy table throws 2events

I´m having some problems with the event handling. I´ve registered a Class with extends AbstractDataListener as EventListener. When there are changes in the product hierarchy table, some extra work should be done. However if i add a new record into the hierarchy, two events are fired.
DEBUG DataEventListener.java:123 - Added:Development;PRODUCT_HIERARCHY;R17;Getra?nke, SEW
DEBUG DataEventListener.java:123 - Added:Development;PRODUCT_HIERARCHY;R17;32 Zoll, B&R
DEBUG DataEventListener.java:123 - Added:Development;PRODUCT_HIERARCHY;R18;56 Zoll, Lenze
DEBUG DataEventListener.java:123 - Added:Development;PRODUCT_HIERARCHY;R18;20 Zoll, allgemein
In this case, i added the records "32 Zoll, B&R" and then "20 Zoll, allgemein". As you can see in both cases two events are fired and the first event seems to come with wrong data. The reported id for the newly created record is R17. For the logging, i did lookup the entry in the hierarchy table by id and use the displayvalue of the record. But the first event always shows the displayvalue from some already existing entry.
How can i avoid duplicate events or if this is not possible, how i can recognize that the display value of the first event is not valid.

I have not tetsted it yet, because I'm waiting for my server to be updated, but SAP told me that the API version 5.5.42.67 should fix the problem.
Thanks for your post.

Event handling with JSF

Hi Everybody,
I have a question about event handling and I am just wondering if I can do the following with JSF.
I have two HTML dropdown lists A and B. When ever a value changes in list A, based on the selected value, list B has to be populated. Is it possible to do with JSF? Can you guys give me pointers where some code samples may be available?
Cheers!
Krish

Take a look at the JSF Value-Changed Listener sections

Problem with "Keybord and Mouse" on Preference Pane

I can't open "Keybord and Mouse" on Preference Pane.
When I click on it, it doesn't open, just keeps loading until I click any other option except "Keybord and Mouse". Otherwise it opens an empty preference pane window, displaying nothing but the gray background.
I can't access any keybord or mouse configuration. How do I fix it?

Hi, did anyone fix this problem yet?
My problem is that i copied the 10.5.2 HD from my old Macbook to my new MBP (with the new multitouch trackpad) to save time and to avoid a new install. Everything works except the mouse and keyboad preference pane. It seems that the demos for the swipe etc are non existent, and therefore the UI does not seem to work. This seems to make sense, as the Macbook did not have the options for multitouch. Does anyone know how to fix this? Is there any way I can reinstall the missing components to avoid a fresh install?
Thanks alot for help. You can save my time
Cheers, André

Problem with keyboard and mouse pm8m-v

I have gotten this pm8m-v from a freind who knew nothing about computers. He had problems with the keyboard and mouse not responding at start up or just freeze on him. So I check it out, called MSI and even sent it to them, they claimed that there was nothing wrong with the board. So here are the specs of the computer now:
pm8m-v motherboard
2-256MB memory PC-2700 DDR 333Mhz
intel P4 2.6GHz
codegen power supply 300W
gateway CDW
western digital 40 harddrive
the rest is on board stuff
the problem is still there and it is driving me crazy, can you please help?

I had the same problem with the PM8M-V, today as a matter of fact, and I kept getting locked up at the point where I had to hit enter to load the WinXP CD to setup the system. After finding this topic I tried a different keyboard. The one that was being used was a Kennsiington PS2 cheapo, I swapped it for a Microsoft (one of those ergonomic styles and I've had it for a long time) Keyboard PS2, and the problem went away. I'm typing on the Kennsington right now, so it's fine just wasn't liked by the PM8M-V for some reason.

Events problem with (Java and ActiveX)

Hi,
I use an ActiveX component with Java and i've got a problem with events.
Java classes were generated with Bridge2Java (IBM).
In order to manage events I added a listener in my application :
javaMyActiveX = new MyActiveX();
javaMyActiveX.add_DMyActiveXEventsListener(new _DMyActiveXEventsAdapter());
I also added a constructor in the _DMyActiveXEventsAdapter class and I fill the body of methods.
The ActiveX generates two types of events :
- The ones are directly generated by methods.
- The others are generated by a thread.
With MS Products (VB, Visual C++, Visual J++), I catch all events.
With java (jdk 1.4), I catch only events generated by methods.
Can anyone help me.

I'm not 100% sure, but the last time I used that bridge, it only worked if you ran your Java app within a Microsoft VM.

Event Handler with parameters

I am to create a generic event handler ro process XML
returned from the server. Its name is this code is "loadFormData".
Here is my code:
var params:Object = new Object();
params.requesttype = 'send';
params.datarequest = 'xml';
params.methodexecute = 'mProcessFileRequest';
params.formname = "FileIdAction";
params.fileid = parentApplication.cboFileList.id;
var t:loadFileData = new loadFileData();
xmlModuleData.addEventListener(ResultEvent.RESULT,
t.loadFormData(ResultEvent, frmGeneral));
var r:runXML = new runXML();
r.getXMLData(xmlModuleData, params);
It would work if I dont send any parameters to
t.loadFormData. But then it is not a generic solution. Is it
possible to send parameters to a callback function?
Thanks

Thanks Charlie
Liao
and congrats to all :-)
* Charlie,
is there a new "Auto Spam Filter"?
[Personal Site] [Blog] [Facebook]

Event handling with buttons and mouse

Similar Messages

Maybe you are looking for