How disable JFrame Background - java

I've made a JFrame with the next Properties:
setLayout(null)
setUndecorated(true)
setResizable(false)
within i've put a JLabel with one Icon(PNG image) in netbeans, and im looking for some soluction that disable the backgroud(full Transparent, and unactive) when the mouse moves THROUGH JFrame's Image(or someother component) BUT the mouse works different outside of the JLabel because JLabel Icon avoid any mouse action over the JLabel. But there's a default Gray background that doesnt exactly what i want.
We can see that mouse doesnt do anything on the JLabel(unless there were some component in the Frame)
Green = JFrame size.
And here the mouse change when moves through of the web page


im looking for some soluction that disable the backgroud(full Transparent, and unactive) when the mouse moves
Don't use full transparency.
If the pixels are not 100% transparent, then the MouseEvents will be handled by the frame.

Related

Preventing components below panel to get hovered when panel is transparent

I have a JPanel, set to be transparent:
public SomePanel() {
setOpaque(false);
[...]
}
I have other JComponent instances under it (at the same location, but below it).
If I draw on the panel using paintComponent(g), putting my mouse on the panel still triggers mouseEntered and mouseExited events for other components below it.
How can I prevent components below the panel to fire mouse events if the non-opaque panel is visible? I am using setOpaque(false) because I need a transparent background, perhaps there is another way to achieve this?

One possible solution: give the covering JPanel its own MouseListener, one that is there to simply swallow the mouse events and prevent them from being transmitted. The code could be as simple as:
myPanel.addMouseListener(new MouseAdapter() {});

Transparent JPanel not working correctly

I want my JPanel to be semi transparent. This panel is animated and has the motion of a dropdown list. I have used the Color(r,g,b,a) constructor to achieve the transparency, however the transparency only takes effect as the panel returns to its original position. For example, as it is moving downwards it is not transparent at all, however when moves up, it spontaneously becomes transparent.
How do I fix this problem?
detailPanel.setBackground(new Color(50,50,50,220));
detailPanel.setLayout(null);
detailPanel.setBounds(0,posY,1200,750);

Check out Backgrounds With Transparency for the cause of the problem (you can't use a transparent Color on an opaque background) and a couple of solutions to fix the problem:
make the component non-opaque and paint the background yourself
use the AlphaContainer class so it can do the painting of the background for you

How to make a JFrame blurred in java?

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).

Swing: Can't set colour of jtextfield inside a panel with image

I have a JPanel which has a background image. To this panel, I add a JTextField, and set the background color to that that text field.
I expected the background to get the colour, but it is being overriden by the background image of panel.
Is this expected behavior? If not, how to get around it?

Check that your textfield is opaque.
Swing behaviour depends on many properties and layouts. You can try to debug your swing components with this tool and make some experiments with properties(background, opaque, ...).

JLabel over transparent painted Rectangle?

I set the background of a JWindow completely transparent. Then I painted a rounded Rectangle (RGB: 0,0,0,100) in it's paint-Method and added a JLabel to the JWindows ContentPane. But when I try to repaint the JWindow to update the JLabel, it doesn't remove the old Rectangle and the old value of the JLabel. So the result is that my custom tooltip box (what it should be) gets less transparent and you cannot read the JLabels contents, because it overlays the old contens.
Is there any way to solve this problem?
BTW, if I don't repaint, it doesn't get less transparent, but the new contents of my JLabel overlays the old Contents, like it is, when I repaint.

First you should override paintComponent instead of paint and call super.paintComponent(g). You should leave JWindow opaque, because the component on the rearmost layer will clear the old contents. If all the layers are transparent you will end up with screen garbage.
See painting with Swing. Perhaps you really wanted to create translucent windows?

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