i have a class with the entry point and the onModuleLoad. That class have a getter for the panel public void sethauptPanel(Composite composite) {
hauptPanel.clear();
hauptPanel.add(composite);
}
but i need to send an object from my class to change it
MenuItem anmelden = new MenuItem(konstanten.anmelden(), new Command() {
#Override
public void execute() {
sethauptPanel(new AdminLoginView(!!!!this!!!));
}
});
I try this, but than he have the Command. I try classname classname = this.
But i can't change the panel.
You have to use className.this
So if your class is named : MainPanel
you should use : new AdminLoginView(MainPanel.this);
Related
This is first class with "gordz()" function
public class Model extends Object implements IModel
{
public static function gordz() : void
{
newobject = gallas.pop();
}
}
Now i try to override the function but i still want that old code is executed... How can i extend this function correctly?
public class LOL extends Model
{
override public static function gordz() : void
{
... //New code + execute old code
}
}
Neither super
You cannot use the super statement in a static method.
nor override
You cannot use the override attribute on any of the following:
[...]
Static methods
can be used in a static method.
Whatever you are trying to do should be accomplished in a different way.
I develop JFace Wizard dialog. WindowBuilder allow to edit wizard pages, but i don't want to put my pages into separate files. How to instruct WindowBuilder parser to allow edit private class ? I've tried #wbp.parser.preferredRoot and #wbp.parser.entryPoint tags as below, but doesn't work.
public class ResetPasswordDialog extends Wizard {
...
#Override
public void addPages() {
Page1 p = new Page1(); // #wbp.parser.preferredRoot
addPage(p);
addPage(new Page2());
addPage(new Page3());
}
}
class Page1 extends WizardPage {
/**
* #wbp.parser.entryPoint
*/
#Override
public void createControl(Composite parent) {
...
}
}
class Page2 extends WizardPage {
}
class Page3 extends WizardPage {
}
WindowBuilder will not work with private components or inner classes. This is intentional and will not be changed. If you want to use WindowBuilder, each class must be extracted to a separate file.
I use VAADIN framework in my simple application.
I have my 2 custom components e.g.
#ClientWidget(value = VComponent1.class)
public class Component1 {
private Component2 cmp2;
public void setDataSource(Component2 cmp2) {
this.cmp2 = cmp2;
}
}
and
#ClientWidget(value = VComponent2.class)
public class Component2 {
}
I would like to bind them on server side.
...
Component2 cmp2 = new Component2();
Component1 cmp1 = new Component1();
cmp1.setDataSource(cmp2);
mainWindow.addComponent(cmp1);
mainWindow.addComponent(cmp2);
...
Question is that I don't know how to send bind infomation to VComponent1.
VComponent1 should have direct link to VComponent2
public class VComponent2 implements Paintable {
public String getCurrentData() {
return "Hello";
}
}
public class VComponent1 implements Paintable,
ClickHandler {
VComponent2 dataSource;
#Override
public void onClick(ClickEvent event) {
super.onClick(event);
String data = dataSource.getCurrentData();
client.updateVariable(uidlId, "curData", data, true);
}
}
I need to avoid communication through server part of Component2 because of some specific time issues.
VComponent1 should have direct access to VComponent2.
Could you please help me with my scenario.
Thanks,
Aritomo
You can communicate a reference to another Vaadin component like this:
Server-side:
public void paintContent(PaintTarget target) throws PaintException {
..
target.addAttribute("mycomponent", component);
..
}
Client-side:
public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
..
Paintable componentPaintable = uidl.getPaintableAttribute("mycomponent", client);
..
}
I have Swing application which manipulate shapes. In my toolbar I have a zoom function that the user activate by clicking on a button, then the cursor of the mouse changes to a magnifier which is an image.
My problem is actually the cursor, for some raisons, when I set the cursor on the panel displaying the shapes, I can't save my model and I get the java.io.NotSerializableException: sun.awt.image.ToolkitImage exception.
My model
public class Document implements IDocObservable,Serializable{
...
public void updateCursor() {
Iterator<IDocObserver> iter = docObservers.iterator();
while (iter.hasNext()) {
iter.next().docCursorChanged();
}
}
...
}
The action
public class ZoomInAction extends AbstractAction {
public void actionPerformed(ActionEvent arg0) {
...
Application.getInstance().getActiveDocument().updateCursor();
}
}
The display Panel (note : if I comment the setCursor(..) line, I'am able to save )
public class Window extends JPanel implements IDocObserver{
...
public void paint(Graphics g){
//drawing the differents shapes
}
#Override
public void docCursorChanged() {
setCursor(Utile.getZoomInCursor();
}
}
}
The class that provide the cursor
public class Utile {
private static Image zoomIn = toolkit.getImage(Utile.class.getResource("/images/zoomin_mouse.png"));
...
public static Cursor getZoomInCursor() {
return toolkit.createCustomCursor(zoomIn, hotSpot, "");
}
}
The writing of the object is a standard Java methode with outStream.writeObject(doc);
thanks
You aren't just serializing a model, you are serializing a list of IDocObservers, which includes Window extends JPanel implements IDocObserver. IOW you are serializing a JPanel. Don't do that: see the warning at the top of the Javadoc. You don't need to save the observers along with the observable, surely: can't you make that list transient?
I am a little confused by this concept.
If I override a public function in a base class, I would have thought that this override function is called and the original is ignored? though this doesn't seem to be the case...
public class AbstractScreen extends Sprite
{
public function AbstractScreen()
{
}
public function updateLanguage():void
{
trace("WARNING: need to override public function updateLanguage()");
}
}
public class Start extends AbstractScreen
{
override public function updateLanguage():void
{
title.text = _model.language.start
title.setTextFormat(titleFormat);
}
}
public class ViewManager extends Sprite
{
private var _model:Model;
private var _screens:Array;
public function ViewManager(model:Model)
{
_model = model;
_model.addEventListener(AppEvent.INIT_VIEW, initViews);
_model.addEventListener(AppEvent.UPDATE_VIEW, updateView);
_model.addEventListener(AppEvent.CHANGED_LANGUAGE, changeLanguage);
}
private function initViews(e:AppEvent):void
{
trace("View Manager: initViews");
_screens = new Array(new Start(_model), new TakePhoto(_model));
dispatchEvent(new ViewEvent(ViewEvent.VIEW_READY));
}
private function changeLanguage(e:AppEvent):void
{
for each (var screen:AbstractScreen in _screens)
{
screen.updateLanguage();
}
}
}
If my model dispatches a CHANGED_LANGUAGE event, the text in the views gets updated, But I also get a trace of "WARNING: need to override public function updateLanguage()" What could I be doing wrong?
You are right, this should not call the base class function. Are you sure there is no call to
super.initLanguage()
within your override?
Most IDE's add this call in the function body automatically, if they create an override for you.
EDIT
From your edit I see your are iterating over two objects of the types Start and TakePhoto. I assume TakePhoto is also derived from AbstractScreen and the trace may be comming from this one.
Also I suggest to use the abstract base class in your iteration.
for each (var screen:AbstractScreen in _screens)
{
screen.updateLanguage();
}