Move Object During Drag And Drop

Jan 23, 2014

I am just trying to understand during a drag and drop how can I transfer the actual object instead of just creating a new one. I believe I am close but I cannot nail down where I am going wrong. Here is my code I am using to test this.

First/Main:

Java Code:

package main;
import javax.swing.SwingUtilities;
public class Main {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){

[Code] ......

When I drag the JPanels it just copies and makes a new one. I tested this by having a sysout send to the console a private int that I set during the initial creation of the object.

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I have a web application. I want to generate the UI part(basically html/jsp pages) to be generated dynamically using drag and drop of elements.So is there is any way that I can:

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I am working on a piece of a code - drag multiple files from local window and drop it into a DIV in my application. And then I want to bind the file into Struts which is where I am having issues right now, snippet below :

<form id="upload" action="http://localhost:8080/XXX/xxx.page" method="POST" enctype="multipart/form-data">
<fieldset>
<legend>HTML File Upload</legend>
<input type="hidden" id="MAX_FILE_SIZE" name="MAX_FILE_SIZE" value="300000" />

[Code] ...

Is it an issue when I give the inputType name as userImage?

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For example, say I have I BoxLayout with a few JButtons in it. How could I make it such that I could drag a JButton such that it could be in front or behind the others?

I've thought about using ComponentMover and just switching to a null layout right before moving it and switch it back right after like bellow, but I'm not sure how to make it keep the change in order.

import java.awt.LayoutManager;
import java.awt.event.MouseEvent;
public class LayoutComponentMover extends ComponentMover
{
private LayoutManager layout;

[code]....

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How do I keep an item (TreeItem) from being selected when performing a drag -n- drop? I don't want it to be selected because it will end up making the target disappear (selection of TreeItem changes target panel).
 
Related question: Is there a way to "veto" a tree selection change as well?

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Passing File Path To Servlet Using Drag And Drop Method In Java Web

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I almost finished the second step , and working on the first step .Since there are so many input files at a given time , i have to use drag and drop method to get the file's location.how to pass file's path to servlet.( servlet code can read the data from the given txt file path )software used - tomcat and netbeans 8.0

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I need these methods in the class

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void moveLeft()
void moveRight()
void moveUp()
void moveDown()
int getXPosition()
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How To Make File Reader Object Move To Next Line If There Is No More Input On Line

Feb 18, 2015

How do I make the file reader object move to the next line if there is no more input on the line. Here is my text and output file as you can see that my text file column cuts off on the 2nd line after 70. I want to read that next line which is 100 into my labs variable however its reading it into my final exams variable. I'll also post the code but I didn't think it was necessary.

textfile:
100908095
1008070
10070

output:
Labs Projects Tests Final Exams
100908095
1008070100
70

[import java.util.Scanner;
import java.io.*;
public class MyGrades
{
public static void main (String[] args) throws IOException
{
int lab, project, test;
int finalExam;//Par and Player values

[Code]...

not sure if I code wrapped it correctly

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How To Drag JLabel Correctly Across JFrame

May 26, 2014

I am currently trying to make a method that will enable a jLabel to be dragged across the screen. I want to be able to drag the object pretty much anywhere on the screen(I hope to eventually make a destination for it where it can be dropped but I will get to that later). I have looked on various places on the internet on how to achieve this and the most simple solution does something like this:

Java Code:

jLabel6.setText("jLabel6");
jLabel6.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseDragged(java.awt.event.MouseEvent evt) {
jLabel6MouseMoved(evt);
}
});
private void jLabel6MouseDragged(java.awt.event.MouseEvent evt) {
x = evt.getX();

[Code]...

This actually works somewhat but it is very faulty. For example the jLabel keeps appearing and reappearing as I drag it. Furthermore when I drag it I can see a duplicate Jlabel being dragged as well in the top left hand screen. So how might I fix this?

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I am making an edit page and I want to populate my drop down menu with things that were already selected. For example, if i want i click to edit my favorite food it will be populated with the one the user previously selected. How do i go about doing this? [URL] ....

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JSP :: Dynamically Populate Drop Down List?

Dec 2, 2014

I'm having an issue with populating a dropdown list in my HTML form.

I want the form to pull in the values from the Database. I have a connection and I'm able to populate a table with the values.

Now I'm trying to populate a dropdown within a form that will bring in currency codes that are in a column called CURR_CODE from the Database.

<%
//Declare variables
//String con_currency_sdo = ""; // as New Connection
String ResultSet = "rs"; // as New Command
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[code]....

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2nd drop down menu (2*) = 5,4,3,2,1
3rd drop down menu (3*)= a,b,c,d,e
4th drop down menu (4*)= 5,4,3,2,1

Example of drop down menu layout - [URL] ....

a->e = low to high (value) predominant value so b5>a1 ; d5>c1
5->1 = low to high (value)

Then the calculation involves the 1st and 2nd menu to form 1 value, so c3, e4 etc and the 3rd and 4th menu unite to form 1 value that is different from the first; c2, e3

So (1*2*) b3 ; (3*4*) b1 = x value

Also the value from 1*2* menu must be lower than value from menu 3*4*; so you cannot input 1*2* c4 ; 3*4* c5 /or b1 (so once the first menu is selected, the 3rd and 4th menu's wont show anything lower)...

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JavaFX 2.0 :: Drag Events Destroyed By Window Resize?

Jan 24, 2015

I've been having great success developing a drag-drop component for a JavaFX app, but I've run into an issue that has me completely stumped.
 
Specifically, I create a component that can be dragged around inside an anchor pane.  That anchorpane is nested in a split pane, which is nested in another anchor pane (the control's root element).
 
The issue can be described this way:
 
Case #1:  If I start the application as a small window, I can reposition the control by dragging it around the screen as I please.
Case #2: If I start the application and maximize the window, again, I can drag the control around the screen as I please.
Case #3: If I start the application, drag the control around a bit, then resize the window, the drag event handling breaks as follows:

1.  The control drag events will fire normally only within the bounds of the anchor pane's previous size.
2.  The mouse cursor's drag icon changes as I pass in or out of those bounds
 
I'm absolutely certain the anchorpane is resizing to match the parent window, otherwise Case #2 would not succeed.  I'm at a complete loss as to determine why the drag events don't fire within the bounds of the resized window after they've been fired within the bounds of it's previous size.
 
Understand the mechanism I'm using to establish the drag handling:  Once the controller is instantiated and added to the scene, an event listener on the class's parentProperty fires to attach the drag event handling to the parent node.
 
Previously, I was setting / clearing the drag handling on the parent node in the drag detection / drag dropped event handlers.  I had suspected that adding / removing drag events was causing the trouble and opted for this solution to ensure that the same event instance was being used each time.  Both methods have had the same result.
 
If you want to see the UI in action, here's a youtube link (it does not demonstrate the problem I'm having):
 
[URL]
 
Here's the code that I'm using, redacted for clarity:
 
public class FileSystemNode extends AnchorPane {
@FXML private AnchorPane fs_node_title;
private FileSystemType mFsType;
private Point2D mDragPoint;

[Code]....

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May 28, 2014

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Here is my current form below form method

="POST" action='UserController?action=edit&albumId=${album.albumId}' name="frmAddAlbum">
<label for="album id">Format : </label>
<select name="action" selected=<c:out value="${album.format}" /> >
<option value="listUser">CD</option>
<option value="listUser">Tape</option>
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<option value="listUser">VINYL</option>
</select>

[code]....

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Swing/AWT/SWT :: StartDrag Method Call - Drag Image Is Not Ready

Oct 15, 2013

Ok so to learn Dnd image ability a little further I created a simple drag and drop application trying to use an external image when trying to drag and drop. Unfortunately I am still getting errors during the startDrag method call. This is the error message it gives "java.awt.dnd.InvalidDnDOperationException: drag image creation problem: drag image is not ready"

The code is as follows:

package com.Test;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;

[Code] ....

The code the error happens on is:

public void dragGestureRecognized(DragGestureEvent e) {
System.out.println("Drag Started!" + e.getComponent().toString());
//BufferedImage img = (BufferedImage) this.createImage(this.getWidth(), this.getHeight());
//BufferedImage img = (BufferedImage) Toolkit.getDefaultToolkit().getImage("Happy.jpg");
//if (!(img == null)){
//System.out.println("Image is not null!");
//}
Image img2 = Toolkit.getDefaultToolkit().getImage("C:1Happy.PNG");
e.startDrag(getCursor(), img2, new Point(0,0), this, this); //This is where the error is
}

I see the text Drag Started in my console with the sysout line but it will not show the image I am trying to use during the drag operation.

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Ping Pong Game - Ball Drop And Catch

Feb 26, 2014

I have created this ping pong game but having problem with ball and paddle collusion. After first collusion it gives score 1 but later it never touch the paddle.

Code:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.Random.*;
import javax.swing.ImageIcon;
 public class Ball extends JFrame implements ActionListener, KeyListener{
int xSpeed=0;

[Code] ....

I think something is wrong here:

public void actionPerformed(ActionEvent e){
y=y+xSpeed;
repaint();
if(y> this.getWidth()){
y=25;
score -=1;
}
if(blockRect.intersects(ballRect)){
y=40;
score +=1;
x =200;
y = 300;
}

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Apr 23, 2014

I am working on a simple app that should emulate a desktop with some icons that you can drag around. I was instructed to use the MouseListener and MouseMotionListener. The icons should drag starting at the point where the mouse originally clicked down on it (ie not dragging from the top right corner).

I am drawing my icons to a jpanel, and I seem to be having two problems:The hitboxes are offThe icon is being dragged from the top right corner, despite having setup up a mouse offset at the beginning of the drag..Here are the relevant classes, the Desktop.draw() method is being called from my DrawPanel

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Desktop implements MouseListener, MouseMotionListener{
static DesktopIcon[] icons;

[code]...

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