A typical usecase for a scene2d modal dialog is to have two buttons in it, one for user action confirmation and one for cancel.
Simply clicking this cancel button results in closing (hiding) the dialog window (which is a default behaviour and basically all that is needed, since we don't want anything to happen), but then repeating the action that is supposed to show it again (ex. clicking a "Delete" button to show delete confirmation dialog) results in nothing happening (because the dialog is now hidden).
What is the proper way to enable the dialog back?
Should show() be called in the No button listener?
noButton.addListener(new ClickListener() {
#Override
public void clicked(InputEvent event, float x, float y) {
deleteDialog.show(stage);
};
The official scene2d code example creates a new dialog each time, but my understanding is that it's better to reuse such elements.
You have your dialog in a variable I guess:
Group dialog = new Group();
You add it like this:
stage.addActor(dialog);
Listener to remove - remove method doesn't delete anything, it just removes the actor from the stage:
noButton.addListener(new ClickListener() {
#Override
public void clicked(InputEvent event, float x, float y) {
dialog.remove();
};
And then when you want to display it again:
stage.addActor(dialog);
Related
I have used many methods like hide();, setvisibility and all. But they are not working.
How can I close it dynamically by clicking on another frame button?
I have used all things which are below on button but not working:
rest1.Disp ds = new rest1.Disp();
ds.setVisible(true);
rest.Cashier c = new rest.Cashier();
c.hide();
c.setVisible(false);
c.setDefaultCloseOperation(HIDE_ON_CLOSE);
c.setDefaultCloseOperation(EXIT_ON_CLOSE);
c.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
Step 1.
You should call the setDefaultCloseOperation during initialization of your JFrame. This tells the system how it should respond when the 'X' (close) button of your JFrame is clicked.
It has an integer parameter that can take 4 possible values:
DO_NOTHING_ON_CLOSE (defined in WindowConstants): Don't do
anything; require the program to handle the operation in the
windowClosing method of a registered WindowListener object.
HIDE_ON_CLOSE (defined in WindowConstants): Automatically hide the
frame after invoking any registered WindowListener objects.
DISPOSE_ON_CLOSE (defined in WindowConstants): Automatically hide and
dispose the frame after invoking any registered WindowListener
objects.
EXIT_ON_CLOSE (defined in JFrame): Exit the application
using the System exit method. Use this only in applications.
It sounds like DISPOSE_ON_CLOSE is what you are looking for - it will hide and dispose the JFrame on which the 'X' button was clicked.
So, in the initialization of your JFrame, call
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
Further reading: https://docs.oracle.com/javase/tutorial/uiswing/components/frame.html
Step 2.
When you have your JFrame set up to be disposed on closing, you can also close it programmatically. You can use
frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
as explained in this answer.
What happens then is that dispatchEvent will send the WINDOW_CLOSING event to the frame. The system knows it should dispose the frame, because you told it to DISPOSE_ON_CLOSE.
So, you should put that command in the ActionListener for the button that you use to close the frame:
someButton.addActionListener(
new ActionListener( )
{
public void actionPerformed(ActionEvent e)
{
frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
}
}
);
Together, these two things accomplish that your frame is closed from a button other than the normal 'X' closing button.
I have a mainpage with a Button with some content. I want to open a second page or popup in witch i must have a longlistselector with X items in it. when i choose one of them i want to change the content of the button to the selected item.
I can make the main page and the second page i dont know how to send back the result to the first page. ?
if you are using "MVVM Light" library then you can use Messenger service Like this....
in second page after selection is changed send a message
Messenger.Default.Send<type>(message,token);
and then in the consructor of page 1 viewmodel
Messenger.Default.Register<type>(this,token,Method);
here token should be same as sender token....
then
void Method(type message)
{
button.content = message;
}
Use Popup to show your LongListSelector ,and when set popupElement.IsOpen=false; the set Button Content same as required,
If you wish to change content as selected list then use popupElement.IsOpen=false; on selection change method and get selected item there.
Remember use selection change method on page not inside popup child class.
If you are using a separate page to show the longlistselector, then you could try something like this.
//in long list page,
Void longlist_SelectionChanged()
{
PhoneApplicationService.Current.State["key"] = longlist.selecteditem;
NavigationService.GoBack();
}
//in your main page where the selected data has to be displayed..
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
if(PhoneApplicationService.Current.State.ContainsKey("key"))
{
Button.Content = PhoneApplicationService.Current.State["key"];
}
}
Normally, forms and pop Ups don't have the focus set when they are just displayed. The obvious solution was to set the focus to the first input in the creation complete event of the component, so the keyboard short Cuts like tab and space start working.
The problem is that, creation complete is not the panacea, sometimes the element is not focus-able at that point, and i am not sure why that happens.
The render event would ensure the focus, but it dispatches too much for a very simple purpose.
In which point a component is always ready to be focus-able?
Edit: The component giving me trouble to get start up focus, is a TitleWindow, which can be poped in 2 ways, a Mouse click event and a keyboard event.
When the tite window is displayed by a click, the first input gets focus in the creation complete event, but when displayed by a keyboard event, it doesnt...
By now i got it working with the following code:
private function titlewindow_creationCompleteHandler(e:FlexEvent):void{
callLater( setTextInputFocus);
}
private function setTextInputFocus():void{
txtPregunta.setFocus();
}
But doubt the way is shown has anything to do with this... because, some other TitleWindow are displayed this way too and they're fine.
So what could it be?
The render event would ensure the focus, but it dispatches too much for a very simple purpose.
If this is true then why not try this:
private function titlewindow_creationCompleteHandler(e:FlexEvent):void{
var callback : Function = function(re : Event) : void {
titlewindow.removeEventHandler(RenderEvent.orsomething, callback);
setTextInputFocus();
};
titlewindow.addEventHandler(RenderEvent.orsomething, callback);
}
Might be kind of a hack since it should be focusable on creationComplete but it would probably work.
I am using JTabbedPane with JPanel to display JTable on one tab and text, dropdown and jbutton on other tab.
First time it is working fine but if i minimize or switch screen to other application and come back to my application it display data correct but with a serious problem with tab change in JTabbedPane. Now tab screen goes to blue and don't display the data.(I hope data is there but it is not repainting or refreshing complete window).
Now with blue screen i do the same procedure and change tab in JTabbedPane it shows correct data.
I used repaint but it doesn't work.
Help needed to refresh window or tab correctly.
It may problem of Browser you are using jdic.dll. Try using any other browser to reload your tabbed pane.
I guess this "issue" is an evergreen. I assume, that most people stumble over this issue possibly when implementing JTabbedPane changes (removing and adding of tabs) in the wrong event-method:
For example, if you want to remove a tab and add a new one in the tabbed pane based on a selection in a JComboBox, you have to put your logic into an 'itemStateChanged'-event of the ItemListener added to this combo-box. If you put your tab-change-logic e.g. into an propertyChangeEvent (PropertyChangeListener), you are doing it all wrong and the timing is always messed up for repainting/refreshing tabbed pane UI elements!
If you use the right event-method, you don't even have to call setVisible, revalidate nor repaint. It will all work out perfectly.
Here's a simple example:
JComboBox<String> c_editor = new javax.swing.JComboBox<String>();
c_editor.setModel(new javax.swing.DefaultComboBoxModel<>(
new String[] { "CSV", "EXCEL", "HTML" }
));
c_editor.addItemListener(new java.awt.event.ItemListener() {
public void itemStateChanged(java.awt.event.ItemEvent evt) {
c_editorItemStateChanged(evt);
}
});
...
protected void c_editorItemStateChanged(ItemEvent evt) {
// get the value selected in the combo box
final String val = c_editor.getSelectedItem().toString();
if (tabbed_pane.getTabCount() > 1) {
// remove the panel which is at position 1
tabbed_pane.removeTabAt(1);
}
if (val.equals("CSV")) {
// add the panel for viewing CSV files
tabbed_pane.addTab("CSV Editor", p_csv);
} else if (val.equals("EXCEL")) {
// add the panel for viewing Excel files
tabbed_pane.addTab("Excel Editor", p_excel);
} else if (val.equals("HTML")) {
// add the panel for viewing HTML files
tabbed_pane.addTab("HTML Editor", p_html);
}
}
That's all, nothing else necessary - the UI will update itself. PS: This issue has nothing to do with browsers as suggested by the 'favoured' answer in this thread, it's all about Java Swing GUI's.
I am relatively new to ActionScript (have started with it 2 months ago), and have a little doubt of 'procedure' or 'technique' related to passing information between objects.
I have made a class that Pops-up a window that contains a panel with a textbox and two buttons, one for accepting, other for cancelling. It should work as a prompt in which you enter some text, and then if you like the changes, you accept, else, you cancel and the text you entered is discarded.
The thing I'm not sure how to handle is how to receive the text, once the user presses 'Accept', from the class I want to receive it from.
So, the approach I took is a bit cumbersome: firstly, when launching the popup, I associate with it a function (called onResult() in the code) from the 'class that launches', which will be called after the user presses the 'Accept' or 'Cancel' buttons; secondly, to get the text that the user inserted in the box, I keep a reference to it public from my class.
Please have a look at the code here:
http://pastebin.com/Kmud8rBe
I've also programmed in Android before, and the approach there would be much cleanier, just putting the text result from the popup inside a bundle inside an intent, and receiving it from the launched class. Here, I have to pass functions and such, which I don't like at all (although it works!).
So, my question is, for you ActionScript gurus out there, how would you approach this?
Thanks and regards!
pepillo
good that you created a class for your popup-functionality but why did you make all functions static? normal class with normal methods would be better ... and let the class extend from Sprite so that you can add the instance right to the stage.
package
{
import flash.display.Sprite;
public class Popup extends Sprite
{
public function Popup (label:String)
{
// add text and buttons ...
}
}
}
then you can just say:
var pop:Popup = new Popup("message");
addChild(pop);
and to get the data back after the popup is closed you would do sth like this:
private function onPressedAccept(event:MouseEvent):void
{
var text:String = _label.text;
// dispatch a custom event which saves the text as its data
dispatchEvent(new MyEvent(MyEvent.ACCEPT, text));
// close popup ...
parent.removeChild(this);
// or you would remove the popup in the ACCEPT eventlistener ...
}
listening for accept/cancel:
var pop:Popup = new Popup("message");
addChild(pop);
// add eventlistener
popup.addEventListener(MyEvent.ACCEPT, onAccept);
popup.addEventListener(MyEvent.CANCEL, onCancel);
private function onAccept(event:MyEvent):void
{
trace(event.data);
}
link about creating custom events:
http://www.8bitrocket.com/2007/7/31/Creating-Custom-Events-In-Flash-AS3-ActionScript-3/