Hi,
I'm one of the authors of UFacekit [1] which is a proposed project for
the Eclipse-Platform [2]. One of the goals of UFacekit is to provide
Eclipse-Databinding [3] -Observables.
After having completed a first version for Swing I now took a look at
QT-Jambi (it's my first time working with QT and QT-Jambi so maybe my
code can be improved). I created 2 Observeable implementation to see how
much work it is going to be (QLineEdit and QLabel) and it was quite easy
(though these 2 are fairly simple widget).
Code using Eclipse-Databinding looks like this:
-----------8<-----------
> package org.ufacekit.ui.qt.databinding.example;
>
> import org.eclipse.core.databinding.DataBindingContext;
> import org.eclipse.core.databinding.observable.Realm;
> import org.eclipse.core.databinding.observable.value.IObservableValue;
> import org.ufacekit.core.ubean.databinding.observables.UBeansObservables;
> import org.ufacekit.ui.example.model.Person;
> import org.ufacekit.ui.qt.databinding.qt.QTEventConstants;
> import org.ufacekit.ui.qt.databinding.qt.QTObservables;
>
> import com.trolltech.qt.gui.QApplication;
> import com.trolltech.qt.gui.QDialog;
> import com.trolltech.qt.gui.QGridLayout;
> import com.trolltech.qt.gui.QLabel;
> import com.trolltech.qt.gui.QLineEdit;
>
> public class TextBinding extends QDialog {
> public TextBinding() {
> QGridLayout layout = new QGridLayout();
> QLineEdit text = new QLineEdit();
> layout.addWidget(text);
>
> QLabel label = new QLabel();
> layout.addWidget(label);
>
> Person p = new Person();
> p.setName("Tom Schindl");
>
> DataBindingContext ctx = new DataBindingContext();
>
> IObservableValue uiObs = QTObservables.observeText(text,
> QTEventConstants.Modify);
> IObservableValue mObs =
> UBeansObservables.observeValue(QTObservables.getRealm(), p, Person.NAME);
> ctx.bindValue(uiObs, mObs, null, null);
>
> uiObs = QTObservables.observeText(label);
> mObs = UBeansObservables.observeValue(QTObservables.getRealm(),
> p, Person.NAME);
> ctx.bindValue(uiObs, mObs, null, null);
>
> setLayout(layout);
> }
>
> public static void main(final String[] args) {
> Realm.runWithDefault(QTObservables.getRealm(), new Runnable() {
>
> public void run() {
> QApplication.initialize(args);
> new TextBinding().show();
> QApplication.exec();
> }
> });
> }
> }
----------->8-----------
I'm writing this mail to:
a) Inform you about the on going work (maybe you want to take a look and
use Databinding in your applications)
=> If you have an in depth knowledge of QT and help us push the
QT-port forward, we are happy if you want to help us. Join us at
[4]
b) Ask some questions:
- How do I sync back from a None-UI-Thread (in databinding this the
task of the Realm you see above)
- How do I find out which thread is the UI-Thread to know when I have
sync back to the UI-Thread
- Why are qt-jambi.jars not packaged as OSGi-Bundles? Would this be
possible
If you are interested in the code. It is available under EPL from [5,6].
Thanks for your attention.
Tom
[1]http://code.google.com/p/uface/
[2]http://wiki.eclipse.org/Incubator/Platform/UFacekit
[3]http://wiki.eclipse.org/JFace_Data_Binding
[4]http://groups.google.com/group/uface
[5]http://uface.googlecode.com/svn/trunk/org.ufacekit.ui.qt.databinding/
[6]http://uface.googlecode.com/svn/trunk/org.ufacekit.ui.qt.databinding.example/
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