Currently I have one application that creates four new process. The four processes that are created create a JFrame, display a video on a AWT Canvas, and run some rendering processes.
My question is, if there is anyway for me to instead of having four separate JFrames, combine all of them into one JFrame. Ideally have something like a JTabbedPanel that would switch from displaying each process.
They must stay in different processes.
Versions:
Java 1.8
Related
I'm developing a JavaFX Application, In here, the outer elements of the JavaFX Window Changes across different Operating System's, i.e. The Position of Close, Minimize and Maximize Window is on left on Mac OS X and on the right in the Windows, Also there Shapes are Different as The OS Changes.
Also if the Application is Running Under OS X, it has drop shadow effect along the boundaries, which in case of Windows is Not Present :
And Want My JavaFX Application to look exactly the Same, Regardless of Operating System, it is Being Run On. How Can i Achieve this ?
Use the undecorator project.
Decorate undecorated JavaFX stages with custom skin. This helper brings a custom look to your JavaFX stages.
See also:
JavaFX entirely customized windows?
I'm trying to create a Window class which I can use to open multiple windows, and which will automatically add an event handler to listen for the Swt.CLOSE event, and call the shell.dispose() method when it is called.
My questions are:
Do I need to listen for shell.dispose() in this case, or to only listen for display.dispose() in my main method?
Do I need to run each window in its own thread, or can all the windows share the same UI thread? I've read some reports of buggy behavior related to event handling in case of multiple windows being open.
I recommend you should always have a single UI thread, which the single Display object runs on. See SWT: single vs. multiple displays or even the Eclipse documentation on Display that strongly recommends using a single Display object:
Applications which are built with SWT will almost always require only a single display. In particular, some platforms which SWT supports will not allow more than one active display.
There are even several sample apps available (such as this one) that demonstrate multiple shells in SWT. Calling shell.dispose() when you want to close a window is the way to go.
You should only use display.dispose() when you are shutting down the entire app, basically as a 'last step' - see this example, or this one, or pretty much any snippet on the SWT Snippets page.
Edit
The Eclipse framework itself is an example of an application that can have multiple windows - it still uses a single Display, with a single UI Thread and shared event system. Eclipse documentation on Threading Issues has a basic explanation of this:
Underneath any GUI application, regardless of its language or UI toolkit, the OS platform detects GUI events and places them in application event queues. [...] It determines which window and application should receive each event and places it in the application's event queue.
I'm creating a new JFrame from within an already running JFrame. Both frames are separate applications, but in this case, the second application gets a "plugin handle" of the first application instead of using its default stuff. For some operations in the second app, a callback is made to the first app to know what to do/display.
This way, the second application can be reused by many other applications. It is and will NOT be possible to manually start some java.exe command to achieve a real separate process.
Now, to emphasize that the second JFrame is another application, I want the taskbar entry to not be grouped together with the entry that was already there for the first JFrame. So basically this is a Windows 7 issue in combination with Java.
The icons on the taskbar are grouped together by default, there is enough space for them to be displayed separately but they simply don't.
How can I display the JFrame's icons separately on the taskbar? I can't find anything on JFrame that does what I want.
Back in my, ahem, Visual Basic programming days, I remember it was very easy to create a multi-form program.
In the gui designer I could simply create as many forms as I wanted and then load them in my program where needed.
I'm having a very difficult time doing this in Java.
I started out using the Java FX Scene Builder but soon discovered there doesn't seem to be good MDI support. So, back to Swing. But, again, I don't see a simple way to design a multi form application.
I read somewhere that JDesktopPane was the way to go as it will allow you to have different internal frames, but there is no way, that I can see, to design multiple frames in the NetBeans gui designer.
You would think that you could hide an internal frame in the designer so you can layout another frame. While I can add multiple frames to my JDesktopPane, they all overlap each other making it impossible to design multiple frames.
Are there any tools available to do what I'm trying to do, or do I just need to bite the bullet and code the guis without the help of a designer?
In brief, I just want to create a simple application that displays three or four options on a home screen
Enter new customer
Search for existing customer
Quick estimate
And depending on which the user selects, opens the appropriate form. It would seem that this would be a basic requirement for almost any program and I don't understand why it seems like actually creating an application with multiple windows/forms was never thought of when developing the design/development tools. Thoughts? Suggestions?
If you're really keen on using the multi document interface (MDI) of the JDesktopPane, create each form in it's own class form. Don't drag them to the desktop. This will allow you to isolate them.
(You can double click a internal frame and it should enter "isolation" mode, basically making it the only thing you can see)
However, unless the windows are sharing information (ie you want to see the information in one window to change the information in another), I'd avoid it.
A better solution might be to use a CardLayout which will allow you to switch between each form as you need.
Again, I'd start by building your forms from something like a JPanel, individually, and when you're ready, add them to your main form.
I always encourage people who are coming into Swing anew to hand code their forms, it will give you a great appreciation for how to design forms and the power of the layout managers.
I have a Windows Mobile application written in Java that uses AWT for the user interface. I am looking at porting the UI to SWT. I got a hold of the SWT libraries for windows mobile and I started looking at what work will be involved in actually porting it over. I think the first thing I have to decide is how to handle a large number of screens in the application.
In AWT the UI is basically a single java.awt.Frame with CardLayout. Each screen is then just an extension of java.awt.Panel, and is added to the Frame. Then whenever we need to change to a different screen we just set that panel to the top-most.
SWT doesn't have such a layout manager (and I'm not even sure if that is the best/most efficient way of doing it anyway, since the system resources associated with every screen in the application are always held). One way I thought of doing it was that each screen would be its own org.eclipse.swt.widgets.Shell. Switching from one screen to another would involve a display manager class creating the new screen (shell) and disposing of the old one (not sure of the performance hit here of creating the shell and all of the widgets every time the screen is shown?). I am not sure though if having multiple shells in one mobile application is a good idea??
Does anyone have any suggestions on the best way to handle multiple screens in a mobile application using SWT? Is there an equivalent to the method we are currently using in AWT, i.e. CardLayout? Or am I right in thinking that this is not really the best way of doing it, given the use of resources for every screen, even if they are not being displayed?
So the answer to my own question seems to be that there is in fact a StackLayout in SWT, which is pretty much identical to CardLayout in AWT. So I can use that and the job of porting from one to the other is pretty easy because they act in the same way.
Not sure how it would play out in Windows Mobile, but MigLayout is a great layout manager for SWT, which may support the kind of layout you describe.
Check out its demos.