In my java program, when the user clicks on a button in the main JFrame another JFrame becomes visible on top of the main frame. Now how to make the previous frame blurred?
Exactly like the background in the image :
Now how to make the previous frame blurred?
have look at JLayer(Java7) based on JXLayer(Java6),
similair effect is possible with GlassPane, or with JViewport (not proper of ways, but good Swing GUI contains JScrollPane as 1st. JComponent in JFrame / JDialog / JWindow)
I'm assuming that you are coding using Java Swing, and the picture is the effect you want.
You would use a JDialog to create the top window, rather than a JFrame. A JDialog is designed to be modal. In other words, lock the JFrame until the JDialog is closed.
The default behavior of a JDialog is to not blur or darken the underlying JFrame. In order to darken the underlying JFrame, you're going to have to paint a black image on the glass pane of the JFrame.
This tutorial shows you how to manipulate the root panes of a JFrame.
There is the setOpacity(float opacity) method that is available in JFrame (inherited from Frame actually).
Related
Is there any way that i can add a jlabel on top of the canvas? In my code, the constructor of my frame adds the label first before adding the canvas but when i run it it does not show the label.
I am painting the background of my canvas.
Suggestions:
Don't use Canvas objects. You've got a Swing GUI and should use the Swing equivalent -- a JPanel.
Draw the background image in the JPanel's paintComponent method as the tutorials and hundreds of examples on this site will show you.
Add the JLabel to the JPanel not to the JFrame.
Then add the JPanel to the JFrame.
Layout managers and your understanding of them are critical. Understand that a JPanel uses FlowLayout by default, and if you add a single JLabel to it, it will be placed in the center top region of the JPanel. Requisite Layout Manager Tutorial Link
I have a class that extends JFrame, and I have decided to create an opening panel, a JPanel with 4 JButtonss which is added add(initPanel) in the constructor.
However, ideally a background image would help the JFrame look cleaner and decorated.
Someone on here suggested I use setContentPane(), and this in fact works.
However, the image appears and all the buttons/text disappear, and I can't get them to show.
I am wondering if there is any way to stack layers / JComponents within a JFrame, so I could have my image in the background and my JPanel in the foreground.
I know that JFrame is a top level container fro Swing GUI and that I can put a JPanel object inside a JFrame object.
But also JPanel is a container...so what is the difference from JFrame and JPanel.
I see that, in the GUI implementation, is implement directly a JPanel object, other times I see that is implemented a JFrame in which I put a JPanel.
What is the difference?
Tnx
Andrea
JFrame - Used to represent the features a like a window. This includes border,titlebar, different controls, and different event handlers.
refer : http://docs.oracle.com/javase/6/docs/api/javax/swing/JFrame.html
JPanel - Most Generic class used as a container to gather other elements together. This is more important with working with the visual layout or one of the provided layout managers.
refer : http://docs.oracle.com/javase/6/docs/api/javax/swing/JPanel.html
EDIT: Some more
JPanel serves as a general purpose container, while JFrame is a window commonly used for stand-alone applications, like a warning window, or a notification window.
JPanel represents an area used for more complex operations or applications.
In JPanel, one panel can hold many operations, while in JFrame, it can have inner frames for a different purpose. Read more: Difference Between JPanel and JFrame | Difference Between | JPanel vs JFrame http://www.differencebetween.net/technology/difference-between-jpanel-and-jframe/#ixzz2g0DDAgAq
A JFrame rappresent a window, the jpanel is a part of the gui contained in a window.
http://docs.oracle.com/javase/tutorial/uiswing/components/frame.html
http://docs.oracle.com/javase/tutorial/uiswing/components/panel.html
The similarity is both are containers.
JFrame is a contrainer which can hold JPanel.
The best use when I had used long days back, when I inherit JPanel
instead JFrame, so latter on, the component can be used in both
JFrame and JApplet.
You can add multiple JPanels inside a JFrame. You can set the
different layouts.
Basically, a JFrame represents a framed window and a JPanel represents some area in which controls (e.g., buttons, checkboxes, and textfields) and visuals (e.g., figures, pictures, and even text) can appear.
JPanel serves as a general purpose container, while JFrame is a window commonly used for stand-alone applications, like a warning window, or a notification window.
I'm quite confused and I when I try to find an answer with google I get bombarded with tutorials.
What is the purpose of each one?
How are they connected?
What is the purpose of the connection?
In java canvas is area used to draw something by java graphics. For ex. drawing an image or rectangle.
Frame is used as JFrame(swing), a top level container which can contain canvas, panels, pane(DesktopPane, ScrollPane) etc..
Panel or JPanel is a subcontainer used to contain textboxes, buttons, canvas etc.
Jframe can contain multiple panels, but panel can't contain JFrame.
Textboxes, buttons can directly be added to Jframe but it decreases flexibility, Suppose we want to hide a set of buttons from ui, then we need to hide them one by one from JFrame. If those text boxes are added to panel then we just need to hide that panel only. There are so many cases about using panel in jframe.
I want to display a JFrame ( made with the Netbeans GUI Editor ) that has an enclosed panel ( the panel encovers the entire JFrame ). The panel is twice as wide as the frame, so I want it so that when a button is pressed inside of the panel, the panel's visible area slides over ( over about 2 seconds) to the hidden area of the JPanel and the previously visible section of the JPanel becomes invisible. I couldn't find any function how to set the currently visible section of a JPanel, so the function and/or a different solution to this would be helpful.
I suggest that you put the JPanel in a JScrollPane, one that if you wish does not show its scrollbars. Then you could easily use the scrollpane's model and a Swing Timer to create an animation that shows the JPanel sliding.
The solutions is CardLayout based http://java-sl.com/tip_slider.html
You can add 2 (or more) panels into container and rotate them.