JTable custom selection and mouse drag events
Hello
I am currently experiencing a problem when using a JTable and a custom selection. I have made a small example to demonstrate the probem. Selection works for this example by listening for when the user clicks or clicks and drags (button held down) and moves the mouse across cells in the table. For each MouseEvent received in the MouseMotionListener mouseDragged method I store the coordinates of that cell at the point of the mouse and render the cell at those coordinates with a line border allowing a more versatile cell selection. The problem that occurs is when you click+drag and move the mouse fast, it looks MouseEvents are created every x milliseconds so when you move fast there isn't a MouseEvent raised for each cell in the click+drag from A -> B. If you run the following example then click and hold down the mouse button and move fast downwards from the top of the table to the bottom you can see that not all the cells are selected vertically.
Is there someway of increasing the mouse poll (if this is indeed the problem) during the click+drag or a better solution to this problem that any one knows!?
I have tried attaching the example but it exceeded the message length for the forum post here is a link to code
[http://www.oneandonlyluppy.pwp.blueyonder.co.uk/TableTest.java]
[http://www.oneandonlyluppy.pwp.blueyonder.co.uk/TableTest.zip] <-- Contains the source and compiled classes
I'll try adding the code again as a separate post
Thanks
Edited by: oneandonlyluppy on Jan 8, 2009 2:44 AM
Edited by: oneandonlyluppy on Jan 8, 2009 2:45 AM
AFAIK the mouse polling rate is OS dependent (being interrupt driven), and may even be affected by processor load. What you could do is store the mouse location (Point) of the last mouseDragged event, and compute a line to the current location, then use some coordinate geometry to identify any intervening cells which are presently being skipped.
db
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* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
package javafxtest;
import java.util.ArrayList;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Dimension2D;
import javafx.geometry.Point2D;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Shape;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
* @author andi
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private DoubleProperty currentRotation;
private ArrayList<Double> angles;
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currentRotation = new SimpleDoubleProperty(this, "currentRotation", 10);
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angles.add(270.0);
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Here is how you can reproduce my effect:
Grab the black handle
Drag the mouse top and right until you approach the angle -90 (have an eye out on the console log)
Let the mouse go: the handle will snap to 90 degree
Grab the handle a second time and move further right
You will see that the angle printed out do not match what you expect.
Let the mouse go, the Handle snaps back to it's original position
As the rotation does not happen around the polygon's center, I have to use a Rotaion effect, which is applied. While I can drag the shape from the rotated location the dragging is always measured from its base position.
So what can I do to work around this?
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polygon.getTransforms().add(rotationTransform);
If worse comes to worst, I can use a circular handle covering everything, then I can rotate around its center, but I would like to avoid this. -
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Attachments:
Untitled 2.vi 12 KB -
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result = ex;
return result;} -
I'm trying to get the end position for a drag mouse event, but this will only gives me the starting position. And if I try to use Mousereleased() this doesn't get call during a drag. What I'm trying to do is if the user drags an item outside a dialog window, then I remove it from a list. Any suggestions?
Hi !
You have to overwrite the methods processMouseEvent(MouseEvent e) ans processMouseMotionEvent(MouseEvent e) from the JComponent.
Example:
public class YourClass{
private Point clickedPoint;
protected void processMouseEvent(MouseEvent e){
if(e.getId() == MouseEvent.MOUSE_PRESSED){
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clickedPoint = null;
super.processMouseEvent(e);
protected void processMouseMotionEvent(MouseEvent e){
if(e.getId() == MouseEvent.MOUSE_DRAGGED){
//do something
super.processMouseMotionEvent(e);
} -
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I Have a JTextField and I want to move a selected text in the JTextField from a location to another by pressing the mouse on selected text and dragging it to newer
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Please -
Calling dialog program screen in custom control and using drag n drop
Hi Experts,
SCENARIO:
I have a custom container control. I want to insert a dialog program screen in custom container control in one half and tree nodes in the other half.
Now my dialog screen has a table control. I want that the user can drag n drop the nodes in the cells of my table control.
Please help.I don't think drag n drop works in table control. You may need to change table control to ALV grid control.
a® -
Don't bother using the SDK timer during mouse down and mouse drag
Yes, don't bother it does not work!
The timer stops during these operations.Helllooo !?
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