java-gnome-developer

[Java-gnome-developer] Using TreeView isgnals with Glade

[Khiraly <khi...@gm...>]

Hi!

I added the signals from Glade and created a method for this signal in
my .java file. If I have forgotten to create the method in my jav afile,
I got this error:
java.lang.NoSuchMethodException: org.epointsystem.puli.gui.Puli.onUserlistTreeRowActivated

Now I wanted to add a signal within a TreeView object.
(I have already added in glade)

I have this error message:
java.lang.NullPointerException
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:141)
	at org.gnu.glade.ListenerDelegate.create(ListenerDelegate.java:125)
	at org.gnu.glade.LibGlade.connect(LibGlade.java:180)
	at org.gnu.glade.LibGlade.glade_xml_signal_autoconnect_full(Native Method)
	at org.gnu.glade.LibGlade.<init>(LibGlade.java:98)
	at org.gnu.glade.LibGlade.<init>(LibGlade.java)
	at org.epointsystem.puli.gui.Puli.<init>(Puli.java:64)
	at org.epointsystem.puli.gui.Puli.main(Puli.java:216)
java.lang.reflect.InvocationTargetException: ListenerDelegate - create failure!

Is it possible to add directly signals to TreeView from Glade?

Best regards, 
 Khiraly

ps: I have follow the TreeView tutorial, but I wanted to use glade as
much as it is possible

Re: [Java-gnome-developer] Using TreeView isgnals with Glade

[Khiraly <khi...@gm...>]

Finally I have a working code. But I have questions too.

Here is the example code:
-------------------- 
userlistTree = (TreeView) puliApp.getWidget("userlistTree"); // userlist tree
userlistTree.addListener(new TreeViewListener() {
	public void treeViewEvent(TreeViewEvent event) {
		 System.out.println("DoubleClick "+event);
	}
});
DataColumn[] dc = new DataColumn[3];
dc[0] = new DataColumnBoolean();
dc[1] = new DataColumnPixbuf();
dc[2] = new DataColumnString();
ListStore ls = new ListStore( dc  );
userlistTree.setModel( ls );
userlistTree.setHeadersVisible( false ); /* true by default */

TreeViewColumn col0 = new TreeViewColumn();
 CellRendererToggle render0 = new CellRendererToggle();
   col0.packStart(render0, true);
   col0.addAttributeMapping(render0,CellRendererToggle.Attribute.ACTIVE,(DataColumnBoolean)dc[0]);
 TreeViewColumn col1 = new TreeViewColumn();
 CellRendererPixbuf render1 = new CellRendererPixbuf();
   col0.packStart(render1, true);
   col0.addAttributeMapping(render1,CellRendererPixbuf.Attribute.PIXBUF,(DataColumnPixbuf)dc[1]);
 TreeViewColumn col2 = new TreeViewColumn();
 CellRendererText render2 = new CellRendererText();
   col0.packStart(render2, true);
   col0.addAttributeMapping(render2,CellRendererText.Attribute.TEXT,(DataColumnString)dc[2]);

userlistTree.appendColumn(col0);
userlistTree.appendColumn(col1);
userlistTree.appendColumn(col2);
		
TreeIter it = null;
boolean bool = true;

it = ls.appendRow();
ls.setValue(it, (DataColumnBoolean)dc[0], Boolean.valueOf( bool ).booleanValue() );

try {
	ls.setValue(it, (DataColumnPixbuf)dc[1], new Pixbuf("images/me.jpg") );
} catch(JGException e) { 
	System.err.println( "image not found : "+e.getMessage() );
}
ls.setValue(it, (DataColumnString)dc[2], "[HUN]Khiraly" ); 
------------------------------

My question is about the above code example is this three lines:
userlistTree.appendColumn(col0); 
userlistTree.appendColumn(col1);
userlistTree.appendColumn(col2);

All this three line generate an treeViewEvent(TreeViewEvent event) method call.
My program start to print three times the method's output:

DoubleClick org.gnu.gtk.event.TreeViewEvent[source=org.gnu.gtk.TreeView@17471e0,id=COLUMNS_CHANGED]
DoubleClick org.gnu.gtk.event.TreeViewEvent[source=org.gnu.gtk.TreeView@17471e0,id=COLUMNS_CHANGED]
DoubleClick org.gnu.gtk.event.TreeViewEvent[source=org.gnu.gtk.TreeView@17471e0,id=COLUMNS_CHANGED]

Of course, after if I double click on the item of treeview, It prints the above message.

Why userlistTree.appendColumn generates a doubleclick signal?
All the appendColumn will generate a doubleclick signal in the future?

Best regards, 
 Khiraly

Re: [Java-gnome-developer] Using TreeView isgnals with Glade

[Khiraly <khi...@gm...>]

Sorry for this many messages, but I have resolved. Maybe there are
people who are interesting.

The appenColumn generate COLUMN_CHANGED signal and the double-click
generate ROW_ACTIVATED signal. So I have added an if() condition.
There is the corrected source code:

userlistTree = (TreeView) puliApp.getWidget("userlistTree"); // userlist tree
userlistTree.addListener(new TreeViewListener() {
	public void treeViewEvent(TreeViewEvent event) {
		if (event.isOfType(TreeViewEvent.Type.ROW_ACTIVATED)) {
			System.out.println("DoubleClick "+event);
		}
		 
	}
});

Best regards, 
 Khiraly

Re: [Java-gnome-developer] Using TreeView isgnals with Glade

[Andrew C. <an...@op...>]

On Sun, 2005-01-05 at 23:00 +0200, Khiraly wrote:

> The appenColumn generate COLUMN_CHANGED signal and the double-click
> generate ROW_ACTIVATED signal. So I have added an if() condition.

In my experience, some various number of signals are emitted any time
you do anything in GTK - and it can be a bit unpredictable. For example,
if you "activate" a button, a "clicked" signal will also be generated.
You get that sort of thing all through GTK. So definitely, 

>  if (event.isOfType(TreeViewEvent.Type.ROW_ACTIVATED)) {

is necessary ... [I tend to use 


  if (event.getType() == TreeViewEvent.Type.ROW_ACTIVATED) {

But I don't suppose there is any difference, is there :) 

The thing to look out for is that just because you handled the one
signal you think you are interested in, doesn't mean there are others.
In one case, I had my signal handler generating a new event which
resulted in a new signal which resulted in re-entry to that handler!
Ick!

AfC
Sydney

[Java-gnome-developer] Window resizing problem

[Khiraly <khi...@gm...>]

Hi!

I can resize the window VERTICALLY without any problem (so raising and
reducing work too)

There are problem when I want to resize HORIZONTALLY:

I can raise the size of my window without any problem.
BUT if I reduce the window size its simply not work (the debug window is
not showing (View -> Debug window), OR its extremely SLOW (the debug
window are showing)).

The example application (eclipse workspace tar.gz-ed up), its available
at(61kB):
http://khiraly.4242.hu/tmp/puliProjekt-maj1.tar.gz

(It require in eclipse glade.jar and gtk.jar, and argument config.xml in
the Run menu. The main class is org.epointsystem.puli.gui.Puli.java)


My theory:

I think this resizing problem come from the wrapping mode (n TextView
widget). So if the wrapping mode is set to CHARACTER (ther are: none,
character, word), the problem is exist. 

Can somebody verify this bug?

Best regards, 
 Khiraly