swingworker

问题 I'm implementing a GUI for a console application, and I need to do some actions (for example, parse an XML file) in a specified time interval. I decided to use javax.swing.Timer alongside SwingWorker to be sure that these actions will not make my application unresponsive. I had implemented the timer this way: public class DataUpdateTimer extends Timer { private String dataFlowControllerXML = null; private DataUpdateWorker dataUpdateWorker = null; public class DataUpdateWorker extends

问题 I have a SwingWorker actor which computes a plot for display from a parameters object it gets send; then draws the plot on the EDT thread. Some GUI elements can tweak parameters for this plot. When they change I generate a new parameter object and send it to the worker. This works so far. Now when moving a slider many events are created and queue up in the worker's mailbox. But I only need to compute the plot for the very last set of parameters. Is there a way to drop all messages from the

问题 I have a swingworker so that my GUI can remain responsive whilst i do work in the background. The problem is i need to update the gui at various points (e.g. update a label with program status/info), but i have a lot of processing to do which i can't do all in one huge doInBackground method. So i instantiate other classes from the doInBackground method to do it, the problem is i can't update the gui except in this SW thread or the EDT. Note: i have removed unnecessary code for brevity I want

问题 Am trying to get my program to update the progress bar values constantly within a method while performing some operations. However this does not happen until the end, and the UI freezes. After looking around to similar questions with my problems, I tried to implement the accepted solutions (Using threads) however I cannot get it to work correctly. Is just like if they where not there. My program contains several classes, the Main being the one automatically created by netbeans on the JFrame

问题 Am trying to get my program to update the progress bar values constantly within a method while performing some operations. However this does not happen until the end, and the UI freezes. After looking around to similar questions with my problems, I tried to implement the accepted solutions (Using threads) however I cannot get it to work correctly. Is just like if they where not there. My program contains several classes, the Main being the one automatically created by netbeans on the JFrame

问题 SwingWorker is used for the following purposes: For running long-running tasks in a different thread so as to prevent the GUI from being unresponsive For updating GUI with the results produced by the long-running task at the end of the task through done() method. For updating GUI from time to time with the intermediate results produced and published by the task with the help of publish() and process() methods. SwingUtilities.invokeLater() can perform the above tasks as follows: Instead of

问题 I've got a progress bar, when I strike the button, on the button listener I've got a progress bar that updates as something downloads. However, the GUI freezes until the download is complete. How can I get this progress bar to update as the download continues? However, if the download starts when the application is compiled without user interference, the download progresses as the progress bar updates. However, it's the complete opposite on JButton action listener. How can I use SwingWorker

问题 I've got a progress bar, when I strike the button, on the button listener I've got a progress bar that updates as something downloads. However, the GUI freezes until the download is complete. How can I get this progress bar to update as the download continues? However, if the download starts when the application is compiled without user interference, the download progresses as the progress bar updates. However, it's the complete opposite on JButton action listener. How can I use SwingWorker

问题 I have trouble with continuous image loading&processing&display in Swing: Below there is simple case where clicking a button causes my program to grab frame from webcam and then display this picture in jlabel. It works as it should, but i have to consecutively click this "Start" button in order to get new image(frame) shown. private void StartActionPerformed(java.awt.event.ActionEvent evt) { displayed_img = this.getPIC_COLOR(player); img_field.setIcon(new ImageIcon(displayed_img)); } Im more

问题 I have trouble with continuous image loading&processing&display in Swing: Below there is simple case where clicking a button causes my program to grab frame from webcam and then display this picture in jlabel. It works as it should, but i have to consecutively click this "Start" button in order to get new image(frame) shown. private void StartActionPerformed(java.awt.event.ActionEvent evt) { displayed_img = this.getPIC_COLOR(player); img_field.setIcon(new ImageIcon(displayed_img)); } Im more