问题
There is a JTabbedPane In my Swing program.
When user clicks on a tab, the program takes a while to get the data and process the results, then shows the results in the selected tab.
How can I display a hour glass, or something of that effect so that user knows it's processing data? Not to click on the tab again before it finishes it job.
回答1:
A JProgressBar (possibly in indetermiante mode) sounds right - put that on the tab until the data has been fetched. A well-designed UI shouldn't force the user to wait for long-running tasks to complete and instead allow them to do something else inbetween.
回答2:
The simplest way is to just call setCursor on the appropriate component (probably the top-level window) with the appropriate Cursor.
component.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
And then set it back when you are done.
component.setCursor(Cursor.getDefaultCursor());
回答3:
setCursor(int) is deprecated. This is probably a bit cleaner:
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
回答4:
As the other answers mention, you can set a wait cursor, but you also mention preventing additional mouse clicks. You can use a glass pane to prevent clicks on components until the long operation is finished. In addition to the Sun tutorials on the glass pane, there is a nice example at http://www.java2s.com/Code/Java/Swing-JFC/DemonstrateuseofGlassPane.htm
回答5:
I would as other mentioned
- Change the cursor
- Use a SwingWorker
- Display the progressbar or an animated image in the glasspane
- Hide the glasspane when the task is completed
- Restore the default cursor
来源：https://stackoverflow.com/questions/1940966/java-swing-gui-hour-glass