I tried to drag a JSplitPane from the Palette in NetBeans but it always shows up on my JPanel as two separate panes with left and right buttons on them.
I could not do anything with the buttons. They were not even components on the Pane. What is going on? How could you make it like normal empty two split panes with nothing one them?
The buttons are just placeholders. First you resize the pane(including those buttons) to what size and position you desire. Then, just drag a JPanel (or any other component) from palette, and drop it on the any of the buttton. That button will be replaced by the JPanel (or component). Then you may do anything as you normally do with JPanel (or that component).
Related
I want to make my jTable expandable while floating/overlay when dragging it using ComponentResizer class. I'm using ComponentResizer class from Rob Camick.
Currently as below after dragging the table:
I tried change my layout to null but the result still same.
In my code, I just added to call the ComponentResizer class:
ComponentResizer cr = new ComponentResizer();
cr.setSnapSize(new Dimension(10, 10));
cr.registerComponent(jScrollPane2);
I expect the dragging table will float and overlay the components below it.
Swing is designed to paint components in 2D space, not 3D space.
So when components are added to the same panel, Swing will paint components in the reverse order the component is added to the panel. In your case it looks like you add the components to the panel before adding the scrollpane to the panel.
So you could:
reverse the order in which you add the components to the panel
use the setComponentZOrder(...) method on the scrollpane to set its value to 0, so it is painted last.
However, this will still cause a problem because if you hover over the button the button will appear because its border is changed. This is because Swing assumes 2D layouts not 3D. If you want to make sure the table is always painted over the button you need to override the isOptimizedDrawingEnable() method of the panel. See Overlap Layout for more information on ZOrder painting.
I solved the problem by put all components in one layered pane and using Border Layout.
I'm new to Java and actually designing the GUI for an application.
My main is a JFrame with 5 buttons and 1 panel which will have the "content", for the first button for example, I've designed a Jframe which has a JTabbedPane.
Now I would like to know how can I incorporate the content from that frame to the "content" panel when clicking on the button ?
I tried to use .add but I get:
java.lang.IllegalArgumentException: adding a window to a container
(seems we can't add Jframe to Jpanel).
I also tried the setVisible way but it doesn't meet what I need since it will hide the panel completely and I will get a tiny window with the buttons.
![Jframe content][1]
![Main Jframe with buttons and Jpanel to show the jframe content][2]
The code is generated by netbeans, and I forgot to mention that I did research on adding a Jframe into another Jframe but here isn't my problem at all.
I tried by changing the Jframe by JInternalFrame but clicking on button doesn't do anything.
Button has
contentPanel.add(new GestionUtilisateur());
So basically when you click on the "Gestion Utilisateur" button for example, you get that JTabbedPane that has to appear in the content area (which is blank here)
You should not be putting JFrames inside JPanels. If you have multiple panels you would like to display, depending on something like a button, look in to LAYOUTS.
In particular, it sounds like a CardLayout would work well for your needs. CardLayouts allow you to swap which panel is displayed in a frame by bringing it to the "front" of a list of panels. This would let you display your JTabbedPane on one button click, then click another to change the content pane.
JFrame can not be added in a JPanel.
use JInternalFrame
Make and hold references to JPanels containing your content. A JFrame is really just that, it's a frame (though you can add a single component to it).
You can't add a JFrame to a JPanel. If you want multiple components to be visible use layouts such as BorderLayout, GridBag, etc. Check out some of the Swing layout tutorials here.
Content should be designed as JPanel (you can design it with drag&drop just like JFrame) but if you really have to put a JFrame to JPanel for some reason, you can do it by
myJPanel.add(myJFrame.getContentPane());
however i would suggest modification of your program.
So I was trying to google how to set a default size to JButtons so that they don't grow as the JFrame is resized. I didn't see a setDefaultSize method but the closest one I could find that does a similar job is setMaximumSize(). However, it doesn't seem to work in my situation and I'm guessing it's because I'm using Grid Layout for positioning my buttons in the frame, here's a small piece of my code:
rightPanel.add(ButtonA);
rightPanel.add(ButtonB);
rightPanel.add(ButtonC);
outerPanel.add(leftPanel);
outerPanel.add(rightPanel);
getContentPane().add(outerPanel);
Here's a picture of what happens:
I would also like to have my buttons in the middle of the right panel when I'm resizing (just like they are now but a lot smaller). Any idea of how I can fix this? I'm assuming that I have to use another layout or something.
Thanks
EDIT: I modified my code to use BoxLayout but it does not seem to put the buttons in the middle. The X Alignment is working but Y Alignment is not doing anything:
ButtonA.setAlignmentX(CENTER_ALIGNMENT);
ButtonA.setAlignmentY(CENTER_ALIGNMENT);
ButtonB.setAlignmentX(CENTER_ALIGNMENT);
ButtonB.setAlignmentY(CENTER_ALIGNMENT);
ButtonC.setAlignmentX(CENTER_ALIGNMENT);
ButtonC.setAlignmentY(CENTER_ALIGNMENT);
JPanel rightPanel = new JPanel();
rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.Y_AXIS));
rightPanel.add(ButtonA);
rightPanel.add(ButtonB);
rightPanel.add(ButtonC);
outerPanel.add(leftPanel);
outerPanel.add(rightPanel);
getContentPane().add(outerPanel);
EDIT2: Fixed with vertical glue.
A GridLayout will always resize the components to fill the space available.
Try using a vertical BoxLayoutinstead. See the section from the Swing tutorial on How to Use Box Layout for more information and examples.
Encapsulate each JButton in a JPanel with a FlowLayout, and then add those FlowLayout JPanels to the rightPanel instead of the JButtons themselves. This will allow you to keep your evenly spaced buttons, but won't make them expand to take up the entire space that the parent container has available.
If you don't want them evenly spaced, but to be three consecutive buttons one after another top down, you can make the right panel have a BorderLayout, add a sub panel to the north area of the BorderLayout with the original GridLayout that the right panel had, and then add those FlowLayout panels containing the JButtons.
I have a UI requirement in java swing wherein I need to achieve the below:
The 2 buttons on the top are placed in a JPanel. I need to draw a line through the center of that panel, upto the beginning of the 2 buttons. The panel below is a container of panels arranged in a card layout. As and when the button is clicked, the card is switched showing another panel.
So in all respects this looks like a JTabbedPane, with one difference, the tabs are buttons arranged in the center of the tabbed pane. I need this difference for the UI I am building.
As of now, the buttons and card layout panel, looks like the below
As you can see, the buttons and panels appear and look separate, instead it would be nice if they are made to appear like they represent one unit.
As you can see, the buttons and panels appear and look separate, instead it would be nice if they are made to appear like they represent one unit.
Put the Border around the outer panel. That is use a panel with a BorderLayout. This panel can have a LineBorder. Then you add your button panel to the NORTH and the panel with the CardLayout to the CENTER.
The line won't be drawn through the buttons but the buttons and panel will appear like they represent on unit.
Building a Java GUI application using Netbeans IDE. I have created a JPanel in it. After adding a lot of fields, I want to also add a JscrollPane to it. I have found that if we right click on the pane we have an option to Enclose it in a container that can be Scroll pane or Split pane etc.
The problem is, that the enclosed button is greyed out when I right click on the panel. How should i fix this ?
I had the same issue. After experimentation, it appears you can only use Enclose In if the Layout is set to Free Design.
However, an alternative method I discovered to accomplish the same thing is to create the empty JPanel and the components you want inside it, all at the same level in the TopComponent. Then drag and drop the components you want into the JPanel, using the Navigator window that shows the component hierarchy.
For example, here I've created a JPanel and a JRadioButton as siblings, and then I drag and drop the JRadioButton inside the JPanel, so that the JPanel is the parent.
Result: