disposing | 易学教程

Anonymous event handlers and disposing

阅读更多关于 Anonymous event handlers and disposing

问题 I have a rather short question about anonymous event handlers: This is the code that I have : public void AddTestControl(Control ctrl) { ctrl.Disposed += (o, e) => { RemoveTestControl(ctrl); }; ctrl.SomeEvent += _Control_SomeEvent; } public void RemoveTestControl(Control ctrl) { ctrl.SomeEvent -= _Control_SomeEvent; } Is this code above fine, or should the code be rewritten in order to remove the Disposed Event Handler? Something like this: public void AddTestControl(Control ctrl) { ctrl

Disposing JFrame by clicking from an inner JPanel

阅读更多关于 Disposing JFrame by clicking from an inner JPanel

问题 I'm trying to dispose my JFrame by clicking a button, located on a JPanel that is placed on the JFrame that I want to close. I tried to make a static method on the JFrame class, but ofcourse my IDE told me that wasn't going to happen. Anyone thinking of a solution? Thanks! 回答1: Try this: public class DisposeJFrame extends JFrame{ JPanel panel = new JPanel(); JButton button = new JButton("Dispose JFrame"); public DisposeJFrame(){ super(); setTitle("Hi"); panel.add(button); add(panel); pack();

Right way of using Backgroundworker

阅读更多关于 Right way of using Backgroundworker

问题 I'm using a backgroundworker for showing a loadingscreen. The DO-event looks as follow: private void bwLoadingScreen_DoWork(object sender, DoWorkEventArgs e) { _ls = new LoadingScreen(); _ls.Show(); while (!bwLoadingScreen.CancellationPending) { Application.DoEvents(); } } I use the following code to Dispose the Loadingscreen: if (_ls.InvokeRequired && !_ls.IsDisposed) { Invoke(new MethodInvoker(delegate { _ls.Close(); _ls.Dispose(); })); } else if (!_ls.IsDisposed) { _ls.Hide(); _ls.Dispose(

Right way of using Backgroundworker

阅读更多关于 Right way of using Backgroundworker

I'm using a backgroundworker for showing a loadingscreen. The DO-event looks as follow: private void bwLoadingScreen_DoWork(object sender, DoWorkEventArgs e) { _ls = new LoadingScreen(); _ls.Show(); while (!bwLoadingScreen.CancellationPending) { Application.DoEvents(); } } I use the following code to Dispose the Loadingscreen: if (_ls.InvokeRequired && !_ls.IsDisposed) { Invoke(new MethodInvoker(delegate { _ls.Close(); _ls.Dispose(); })); } else if (!_ls.IsDisposed) { _ls.Hide(); _ls.Dispose(); } Should I use the RunWorkerCompleted event for this? Is this the right way to use the

JavaFX IllegalStateException when disposing JFXPanel in Swing

阅读更多关于 JavaFX IllegalStateException when disposing JFXPanel in Swing

I've just come across an oddity with JavaFX and Swing. When disposing a JavaFX Panel that had been added to a JFrame or JPanel, re-adding a new JFXPanel will throw an IllegalStateException: "Platform.exit has been called". In my case this has happened after I removed some JPanels with JFXPanels inside and then tried to re-add them. Luckily I found a solution in an Oracle Forum. Link: https://kr.forums.oracle.com/forums/thread.jspa?threadID=2393986 In JavaFX 2.2 add the following line in the Main class: Platform.setImplicitExit(false); This has done the trick in my application and will

JavaFX IllegalStateException when disposing JFXPanel in Swing

阅读更多关于 JavaFX IllegalStateException when disposing JFXPanel in Swing

问题 I've just come across an oddity with JavaFX and Swing. When disposing a JavaFX Panel that had been added to a JFrame or JPanel, re-adding a new JFXPanel will throw an IllegalStateException: "Platform.exit has been called". In my case this has happened after I removed some JPanels with JFXPanels inside and then tried to re-add them. 回答1: Luckily I found a solution in an Oracle Forum. Link: https://kr.forums.oracle.com/forums/thread.jspa?threadID=2393986 In JavaFX 2.2 add the following line in

Disposing JFrame by clicking from an inner JPanel

阅读更多关于 Disposing JFrame by clicking from an inner JPanel

I'm trying to dispose my JFrame by clicking a button, located on a JPanel that is placed on the JFrame that I want to close. I tried to make a static method on the JFrame class, but ofcourse my IDE told me that wasn't going to happen. Anyone thinking of a solution? Thanks! Try this: public class DisposeJFrame extends JFrame{ JPanel panel = new JPanel(); JButton button = new JButton("Dispose JFrame"); public DisposeJFrame(){ super(); setTitle("Hi"); panel.add(button); add(panel); pack(); button.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent arg0) {