I have a Jlabel packed with html. I would like to scroll this content as you would with overflow : auto; in css. I can't seem to get this to work. Has anyone come across this? I'd like to keep the content in HTML - for mark up - and use something light to scroll though it.
BTW: The Jlabel is in a popup - I can use something else other than a JLabel if needs be but would like to keep the html.
Cheers,
slotishtype
Put that JLabel in a JScrollPane instanciated that way :
JScrollPane scroller = new JScrollPane(myJLabel, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
Notice that, as this constructor states, those parameters can be changed afterwards.
Related
I am Having a JTextField in JFrame having mouselistener on it,and i want to display JPanel with some contents when mouse event is fired.JPanel is displaying but the contents in it are not visible.
you cannot write text directly inside JPanel. Use a JLabel and put the text inside that JLabel and then place the JLabel on the JPanel
You have to call revalidate() after adding new panel, which will instruct the layout manager to recalculate the layout and panel.repaint(); if necessary.
If this didn't solve your problem, post an SSCCE
I wrote a simple gui with DesignGridLayout as layout manager.
I have a 2 JTextFields, beneath them a JScrollPane containing a JTextArea, and right under it I have a button.
Upon maximizing the JFrame, everything is stretching out nicely to fill the screen.
The problem starts when I try to restore the Frame to it's original size. the JScrollFrame Vertical size remains too large, and the Button is not shown, since it is covered by the too big Jscrollpane.
The problem is the same for manual resizing. The JScrollPane sets a new value for it's vertical size according to how much I stretch it.
I tried overriding the getScrollableTracksViewportHeight() method from Scrollable interface, but it had no affect. In addition, I had this entire setting inside a Jpanel which I removed, but it's still the same.
Any insights would be appreciated.
edit: added samples of code.
This code creates most of the Gui:
DesignGridLayout layout = new DesignGridLayout(frame);
layout.row().grid().empty().add(new JLabel("someText1"), someText1);
layout.row().grid().empty().add(new JLabel("someText2"), someText2);
layout.emptyRow();
layout.row().grid().add(new JSeparator());
layout.row().grid().empty().add(titleLabel).empty();
layout.row().grid().add(textarea("",5,6));
layout.row().grid().empty().add(button).empty();
This code creates The JScrollPane:
private JScrollPane textarea(String content, int rows, int columns)
{
JTextArea textArea = new JTextArea(rows, columns);
JScrollPane scrollPane = new JScrollPane(textArea);
return scrollPane;
}
so if you add an textarea to your html page and have some type of continuous output being produced into that text area. The scroll bar keeps scrolling to the top. This will keep you from scrolling up and down manually. How do you keep an textarea from autoscrolling like this when new data enters the textarea?
This is off the top of my head,
but if you are appending to the textarea with, say, jquery, then something like this should work:
var scroll = $('textarea').scrollTop();
$('textarea').append("yourcontent").scrollTop(scroll);
If I've understood what you need, this will return to the scrollTop of the textarea as it was prior to the new content being added - it won't prevent the autoscroll but should be quick enough to make it appear to.
I have a JPanel with specific size. I have added a JLabel on it. Now the text of JLabel is dynamic and comes from the database. When I add this data to JLabel, instead of it staying in the JPanel, it spreads out.
When it happens, the data inside the JPanel is visible but the one outside the JPanel is not visible (which is obvious). I want to know if there is a way by which the data instead of going out of JPanel, will stay in JPanel itself (means it automatically adds a newline and moves to newline instead of going out).
JLabel doesn't have a method for that. But you have a few options:
Use HTML tags in text you set "Hello<br/>World".
Use JTextArea or JEditorPane and disable editing. JTextArea have the setLineWrap(true) method, and JEditorPane wraps lines by default.
You'll want to use something more robust than a simple JLabel, like a JTextArea. Your best place to learn how to achieve the desired effect would be to read the Swing tutorial here. Since you know the size of your JPanel you can set the size of your JTextArea and it should automatically line-wrap to accommodate for your variable-sized strings.
I have a JPanel that I want to use to contain 3 vertical components:
a JLabel
a JTextField
a JScrollPane
I want all 3 components to fill the JPanel's width. I want the JLabel and JTextField to use their normal heights and the JScrollPane to use the rest.
BoxLayout almost works, except it seems like the JTextField and JScrollPane share the "extra" space when the JPanel is made large.
What can I do?
Create a BorderLayout. Put the JScrollPane in its center.
Create a JPanel with a BoxLayout. Put the JLabel and JTextField in that, vertically. Put that JPanel into the NORTH side of the BorderLayout.
GridBagLayout is pretty handy. You can control anything you need and you can control only what you need. You're probably going to be interested in only the vertical parameters.
You could also use DesignGridLayout as follows:
DesignGridLayout layout = new DesignGridLayout(thePanel);
layout.row().center().fill().add(theLabel);
layout.row().center().fill().add(theTextField);
layout.row().center().fill().add(theScrollPane);
This should exactly behave as you describe.
Each call to row() creates a new row in the panel.
The calls to fill() make sure that each component uses the whole available width.
A few advantages of using DesignGridLayout here are:
only one LayoutManager for the whole
panel
automatic borders and inter-rows spacing