JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
JPanel topPanel = new JPanel(new FlowLayout());
.....
JPanel centrePanel = new JPanel(new FlowLayout(10, 0));
........
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setPreferredSize(new Dimension(100, 160));
centrePanel.add(glListScrollPane);
........
........
JPanel bottomPanel = new JPanel();
bottomPanel.setLayout(new GridLayout(0, 2));
......
........
panel.add(topPanel, BorderLayout.CENTER);
panel.add(centrePanel, BorderLayout.CENTER);
panel.add(bottomPanel, BorderLayout.CENTER);
frame.add(panel);
frame.add(standardButtonPanel);
public void lockScreen(boolean editable) {
standardButtonPanel.button1.setVisible(editable);
......
}
When doing edit and un-edit. the panel is changing its position a little bit.
I have used BoxLayout as I wanted to have the components have there own size and users can resize the screen also.
Is there any other approach? Where I can fix the layout problem?
Instead of using setVisible, try using setEnabled as it dosent hide the button (hence does not affect the UI) but makes it so that the end-user cannot press the button.
Related
I have main JPanel which is Borderlayout with added 4 JPANELS: NORTH(Green), WEST(Red), CENTER(Gray), SOUTH(Blue). I want to reduce width size of WEST(Red) Jpanel, or increase width size of Center(Grey) Jpanel.
Screenshot:
Here is my code:
frame = new JFrame("FreshPos baza podataka");
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
// Main paneel
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.setBorder( BorderFactory.createEmptyBorder(10,10,10,10) );
frame.getContentPane().add(panel);
//West panel;
JPanel panelWest = new JPanel(new GridLayout(14,0,0,2));
panelWest.setPreferredSize(new Dimension(300, 300));
panelWest.setBorder( BorderFactory.createEmptyBorder(100,0,0,0) );
panel.add(panelWest, BorderLayout.WEST);
panelWest.setBackground(Color.red);
for (int i = 0; i < MAX_TABLES; i++) {
buttonsTables[i] = new JButton(tables[i]);
buttonsTables[i].setMaximumSize(new Dimension(Integer.MAX_VALUE, buttonsTables[i].getMinimumSize().height));
panelWest.add(buttonsTables[i]);
panelWest.add(Box.createVerticalStrut(10));
}
//South panel;
JPanel southPanel = new JPanel(); // Donji layout za dugmice
southPanel.setBorder( BorderFactory.createEmptyBorder(20,0,0,0) );
panel.add(southPanel, BorderLayout.SOUTH);
southPanel.setBackground(Color.BLUE);
JButton buttonDodaj = new JButton("Dodaj");
southPanel.add(buttonDodaj);
JButton buttonIzmeni = new JButton("Izmeni");
southPanel.add(buttonIzmeni);
JButton butonObrisi = new JButton("Obrisi");
southPanel.add(butonObrisi);
//North panel;
JPanel northPanel = new JPanel(); // Donji layout za dugmice
northPanel.setBorder( BorderFactory.createEmptyBorder(0,10,0,0) );
panel.add(northPanel, BorderLayout.NORTH);
northPanel.setBackground(Color.green);
JButton buttonImport = new JButton("Importuj fajl");
buttonImport.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
importActionPerformed(evt);
}
});
northPanel.add(buttonImport, BorderLayout.WEST);
JButton ButtonRecord = new JButton("Snimi fajl");
northPanel.add(ButtonRecord, BorderLayout.WEST);
// Central panel
JPanel centerPanel = new JPanel(new BorderLayout());
centerPanel.setBackground(Color.GRAY);
panel.add(centerPanel, BorderLayout.CENTER);
I want to reduce width size of WEST(Red) Jpanel
panelWest.setBorder( BorderFactory.createEmptyBorder(100,0,0,0) );
So why is the width of your Border so large?
A Border is for "extra" space around the components.
So the width of your panel is the width of the buttons plus the width of the border.
Edit:
panelWest.setPreferredSize(new Dimension(300, 300));
Don't hardcode a preferred size. The layout manager will calculate the size based on the above logic. Get rid of that statement.
Edit 2:
// buttonsTables[i].setMaximumSize(new Dimension(Integer.MAX_VALUE, buttonsTables[i].getMinimumSize().height));
Get rid of any logic that attempts to control the size of a component. The point of using layout managers is to let the layout manager do the size calcualtions.
So for your buttons panel you need to nest panels to prevent the buttons from taking all the space.
You can do something like:
JPanel wrapper = new JPanel();
wrapper.add(buttonsPanel);
...
//panel.add(panelWest, BorderLayout.WEST);
panel.add(wrapper, BorderLayout.WEST);
By default a JPanel uses a FlowLayout which will respect the preferred size of any component added to it.
Another option is to use a GridBagLayout with the wrapper panel. By default the panel will then be displayed in the "center" of the available space. So it will be vertically centered and you won't need the EmptyBorder.
I would like to pin my footer panel to the bottom of my JPanel, i have tried the following.
JPanel pane = new JPanel();
pane.setLayout(new BorderLayout());
pane.add(header, BorderLayout.PAGE_START);
pane.add(table, BorderLayout.CENTER);
pane.add(footer, BorderLayout.PAGE_END);
JScrollPane SP = new JScrollPane(pane, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
What am i missing here?
This should work
JPanel child = new JPanel(new BorderLayout());
child.add(header, BorderLayout.PAGE_START);
child.add(table, BorderLayout.CENTER);
JScrollPane scrollPane = new JScrollPane(child, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
JPanel pane = new JPanel(new BorderLayout());
pane.add(scrollPane, BorderLayout.CENTER);
pane.add(footer, BorderLayout.PAGE_END);
I need to do footer with scroll like on the table
A JScrollPane doesn't support this type of functionality. So you somehow need to fake it.
Maybe you can use a second JScrollPane as the footer component. Then you share the model of the horizontal JScrollBar. Using RSDinh's code as a starting point you might do something like:
//pane.add(footer, BorderLayout.PAGE_END);
JScrollPane footerScrollPane = new JScrollPane(footer);
JScrollBar horizontal = footerScrollPane.getHorizontalScrollBar();
horizontal.setModel(scrollPane.getHorizontalScrollBar().getModel());
I hava an JButton and want to position to the bottom left of an JPanel. This is my code:
panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel.setPreferredSize(new Dimension(130, 300));
panel.add(jlabel1);
panel.add(jlabel2);
panel.add(button, BorderLayout.SOUTH);
Later in the code, I update the Jlabels (if it matters):
panel.remove(jlabel1);
panel.remove(jlabel2);
//Some other code
panel.add(jlabel1)
panel.add(jlabel2)
Through all this, I want the JButton to stay in the bottom of the JPanel. How can I fix this? Nothing happens with the BorderLayout.SOUTH. Thanks.
The short answer is that BorderLayout.SOUTH isn't doing anything because the panel to which you are adding button doesn't have a BorderLayout.
Check out the Java Tutorials section on layout managers for a better explanation
https://docs.oracle.com/javase/tutorial/uiswing/layout/index.html
Meanwhile, this code (made up on-the-spot and completely untested) should give you some ideas about the direction you need to go:
panel = new JPanel(new BorderLayout());
panel.setPreferredSize(new Dimension(130, 300));
JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
buttonPanel.add(button);
panel.add(buttonPanel, BorderLayout.SOUTH);
JPanel labelPanel = newJPanel(new FlowLayout(FlowLayout.LEFT));
labelPanel.add(jLabel1);
labelPanel.add(jLabel2);
panel.add(labelPanel, BorderLayout.CENTER));
How to stack multiple buttons on top of each other? The buttons should be positioned at the bottom of the application frame. I am trying to find a combination but with no luck, for example:
final JPanel content = new JPanel(new BorderLayout());
content.add(chartPanel);
content.add(button1, BorderLayout.SOUTH);
content.add(button2, BorderLayout.PAGE_END);
setContentPane(content);
The buttons just overlap.
final JPanel content = new JPanel(new BorderLayout());
content.add(chartPanel);
final JPanel buttonPanel = new JPanel(new BorderLayout());
buttonPanel.add(button1, BorderLayout.NORTH);
buttonPanel.add(button2, BorderLayout.SOUTH);
content.add(buttonPanel, BorderLayout.SOUTH);
setContentPane(content);
I have a frame with 4 JPanels and 1 JScrollPane, the 4 panels are in border layout north, east, south, west and the scrollpane in the center.
I have been trying to get the pack method for a frame functioning but when run you just get the title bar of the window.
Any Ideas?
JFrame conFrame;
JPanel panel1;
JPanel panel2;
JPanel panel3;
JPanel panel4;
JScrollPane listPane;
JList list;
Object namesAr[];
...
...
...
namesAr= namesA.toArray();
list = new JList(namesAr);
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
list.setVisibleRowCount(-3);
list.addListSelectionListener(this);
listPane = new JScrollPane(list);
panel1 = new JPanel();
panel2 = new JPanel();
panel3 = new JPanel();
panel4 = new JPanel();
conFrame.setLayout(new BorderLayout());
panel1.setPreferredSize(new Dimension(100, 100));
panel2.setPreferredSize(new Dimension(100, 100));
panel3.setPreferredSize(new Dimension(100, 100));
panel4.setPreferredSize(new Dimension(100, 100));
panel1.setBackground(Color.red);
panel2.setBackground(Color.red);
panel3.setBackground(Color.red);
panel4.setBackground(Color.red);
conFrame.pack();
conFrame.add(panel1, BorderLayout.NORTH);
conFrame.add(panel2, BorderLayout.EAST);
conFrame.add(panel3, BorderLayout.SOUTH);
conFrame.add(panel4, BorderLayout.WEST);
conFrame.add(listPane, BorderLayout.CENTER);
conFrame.setVisible(true);
You need to add the panels to the frame "before" you do the pack() otherwise there is nothing to pack.
Also, the default layout for a frame is the BorderLayout.