In my MainActivity, I handle my methods for database changes and also the listen for an icon clicks in the toolbar.
The icon performs that the list from database (shown in Recycler View) gets ordered ascending/descending.
But the Problem is when i click the icon the list only gets updated after i reopen the Fragment.
My thoughts : how can i open a method from the Adapter? Or update the RecyclerView in the MainActivity in some way? Thanks for sharing ideas
Edit :
supposedly i found a similar scenario :) so i have to try to implement an Listener from the Fragment where the RecyclerView Adapter gets shown ( listen to Main activity) and from there call Adapter.notifiyDataMoved() ?
Related
I am trying to create a nested side menu for a CN1 application, similar to the one in the screenshot.
For the nested sidemenu to work, I image it has to stay open when the user presses a command of a dropdown list , so that he/ she can choose an option.
But the CN1 sidemenu appears to close every time and I couldn't find a workaround.
One approach I was trying was to add an action event to the "hamburger menu ", but this doesn't seem to work.
Button sideBtn = (Button)((BorderLayout)bar.getLayout()).getEast();
sideBtn.addActionListener(new ActionListener(){
#Override
public void actionPerformed(ActionEvent evt) {
Toolbar.setPermanentSideMenu(true);
};
Neither does adding Toolbar.setPermanentSideMenu(true) to any other button's action event.
Anther approach I have in mind is to add hidden buttons to the sidemenu and repaint the toolbar when the button is clicked, but this still does not keep the sidemenu open and seems to be not very direct.
Is there anything more straightforward? What would be the best approach?
Thanks in advance for any kind response.
The setPermanentSideMenu method is designed for tablets and not for what you are trying to do. Toggling it after the init(Object) method was invoked doesn't make sense and might break your app.
You didn't list how you added the button to the side menu but adding it using addComponentToSideMenu(Component) should work (notice I didn't use the version that accepts a Command).
How can I reset my viewmodel when the user clicks new button on the view that has the viewmodel as it's datacontext?
For example:
If I have a view NewCustomer and upon save, the data is saved to the DB and the newly created account number is displayed. But when the user clicks the New button in the screen, I want the view (viewmodel) to be reinitialized. Or if the user clicked cancel in the screen to clear all changes.
How can I achieve this? I am using Prism 5.0 and Unity as my container.
If I used IRegionMemberLifetime, I can clear the viewmodel data when I navigate away and navigate again to the view (by setting the KeepAlive as false on clicking New button before navigating away). But I want the form to be cleared without navigating. Can this be done?
You could have a screen/workspaceViewModel, and another ViewModel wrapping your data.
So two classes: CarScreenViewModel and CarViewModel.
The CarScreenViewModel would have a property, say CurrentCar, which reflects what is currently selected in the screen. Then, when clicking the Create button, you simply set:
CurrentCar = new CarViewModel();
Resetting partially loaded data will only lead to behaviour that is hard to reproduce. It is better to start with a fresh instance.
Your standard approach will be something like below
ViewModels
CustomersContainerViewModel which contains
a collection of CustomerViewModel s
and ICommands like
CreateNewCustomer
DeleteExistingCustomer
UpdateExistingCustomer
Your View will contain
the CustomersContainerView which will contain
a collection of Customer Objects in your required UI element
a button to Create new customer (which will launch a new screen which contains the newCustomer fields it can also contain cancel, which will just close the form)
a button to delete (can also be a ContextMenu)
a button to update (can also be a ContextMenu) which will launch a customer form filled with details from DB.
Hopefully this makes some sense... Let me know if you have problem with any of the above
Update - Forgot to add. NewCustomer Command will add a new Customer object to your CustomerCollection and that should open a NewCustomer form (or whatever you chose) for user to input the customer details. Cancel/Delete will just remove that record from the collection. Delete will update the DB as well in addition
In my case
yourViewName.variableName.postValue("")
I have a view where i have 3 links(routers which have methods triggering a View bound event).
Normally based on the link i click i reduce from the main collection a subset and render it in another VIEW.
But suppose i have clicked on a link say '....#/remaining' and then i click again on the same link, the event bound is not triggered.
But when i click on any other link and click back on the desired link, everything works!
Is this a Backbone feature/defect, if so what are the alternatives to work around this?
Thanks in Advance.
I think this is because you're doing the reduce in the Router. When you're already on #remaining, your route handler won't execute because there's no route change at all.
Instead of that, you could use a View UI event on the link to manipulate the collection, so it will always be called no matter if you're already on that route or not.
You could also use events as a communication method between your app's components: your data, your views, and so on.
Hope it helps, I didn't put any code because you didn't either. :)
I have a page X where I set a page property "type=myValue" using a drop down in page properties.
What I need is that when I create child page under page X, the child page should get the same property set for itself. This property should be disabled for end users to edit.
Can this be done without going through a workflow ? I need this to be set as soon as the page is created. ! Maybe some ext-js function on the child page template ?
Since you do not want to create a workflow, there are 2 other ways which are available through which this functionality can be achieved.
Creating an event handler that listens to Node Added event
Creating your custom servlet that handles the page creation activity by overriding the handler(CQ.wcm.SiteAdmin.createPage) for the Create Page button instead of the default command.
For quick reference, you can find details of implementing the event handler here.
I've stumbled on an issue with Comboboxes in javafx2.2. This is the scenario:
Users click on the 'editFile' button.
Another pane becomes visible (with the setVisible method).
This pane contains 6 comboboxes.
Three of them have fixed items: cboReport, cboSales, cboSend. Three of them get their data from a db (ObservableList) and get populated when the pane becomes visible: cboFile, cboCustomer, cboVet
The user selects a file number from the cboFile. The rest of the comboboxes are beeing set with the correct values.
The user presses the save button, the file gets saved as intended.
Next the user presses a close button.
When the window closes, the data on the pane gets resetted through a resetGUI_editFilePane() method. There is have lines like:
...
cboReport.getSelectionModel().clearSelection();
cboSales.getSelectionModel().clearSelection();
cboSend.getSelectionModel().clearSelection();
cboFile.getSelectionModel().clearSelection();
cboCustomer.getSelectionModel().clearSelection();
cboVet.getSelectionModel().clearSelection();
cboFile.getItems().clear();
cboCustomer.getItems().clear();
cboVet.getItems.clear();
...
When the user opens the pane again by pressing the 'editFile' button I notice that only the 'fixed item' comboboxes have cleared their selection, the dynamicly filled comboboxes show the last selected item although the value from the selection itself is null. This looks like a graphics bug to me or am I doing something wrong?
Is there any way around this issue or what is the best method to reset a combobox?
EDIT 2014/08/27:
This is officially not a bug(clearSelection() does not clear value):
https://bugs.openjdk.java.net/browse/JDK-8097244
The official "workaround" is to clear the value of the ComboBox after clearing selection.
cb.getSelectionModel().clearSelection();
// Clear value of ComboBox because clearSelection() does not do it
cb.setValue(null);
It is very simple. You just need to work with the value property of ComboBox. here you go ....
ComboBox c;
c.valueProperty().set(null);
I hope this works for you :-D
I ran into nearly the exact same situation and came across your question while looking for a solution. Fortunately, I came up with a workaround that forces the ComboBoxes to reset. When you reset the data on your pane, instead of doing something like:
cboVet.getSelectionModel().clearSelection();
cboVet.getItems.clear();
do something like this...
parentNode.getChildren().remove(cboVet);
cboVet = new ComboBox(); // do whatever else you need to format your ComboBox
parentNode.add(cboVet);
You'll also need to do a setItems() again on your ComboBox so the new one will be populated. This is not an ideal solution but it seems to be working as I expect the provided clearSelection() method would.
You can retrieve the items and have them all removed:
cboVet.getItems().removeAll(cboVet.getItems());
I've just tested a working solution with the Java JDK 1.7.11:
combobox.setSelectedItem(null);
combobox.setValue(null);
Hope it helps :)
I use reflection with direct manipulation of buttonCell field in ComboBox skin:
#SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> void resetComboBox(ComboBox<T> combo) {
Skin<?> skin = combo.getSkin();
if(skin==null){
return;
}
combo.setValue(null);
Field buttonCellField;
try {
buttonCellField = skin.getClass().getDeclaredField("buttonCell");
buttonCellField.setAccessible(true);
ListCell buttonCell = (ListCell) buttonCellField.get(skin);
if(buttonCell!=null){
StringProperty text = buttonCell.textProperty();
text.set("");
buttonCell.setItem(null);
}
} catch (NoSuchFieldException
| SecurityException
| IllegalArgumentException
| IllegalAccessException e) {
e.printStackTrace();
}
}
I think it's also possible by providing your own buttonCell implementation through buttonCellFactory property
I had the same problem with a ComboBox. The buttonCell of the ComboBox is not updated correctly when I change the items of the ComboBox. This looks like a graphics bug.
I use direct manipulation of buttonCell field in ComboBox.
combo.getButtonCell().setText("");
combo.getButtonCell().setItem(null);
This is the best solution I've found without recreate the ComboBox.
To clear SelectionModel I found nothing better than creating a new instance of Combobox (previous answers update):
myParentNode.getChildren().remove(myCombobox);
myCombobox = new ComboBox();
myParentNode.add(myCombobox);
But this solution evolves other problems: if you use fxml, this combobox will be placed in the wrong place and with wrong parameters. Some fxml parameters are hardly reproduced directly from your controller class code and this is awful to do it every time you need to clear the combobox.
The solution is using custom components instead of creating instances directly in main controller class code, even if these components are standard. This also helps to free some lines in your main controller class by moving component related event methods and other methods to a separate class file, where you use a reference to your main controller class.
How to create custom components in JavaFX FXML Application can be found in http://docs.oracle.com/javafx/2/fxml_get_started/custom_control.htm , but note that CustomControlExample class is not needed for every custom component in your application, if it already has an entry point class with start(Satge stage) method.
How to resolve possible errors with reference from custom component controller class to main controller class can be found in JavaFx: how to reference main Controller class instance from CustomComponentController class?
I need to clear selection of the combo box. And this code worked for me:
List<Object> list = new ArrayList<>(comboBox.getItems());
comboBox.getItems().removeAll(list);
comboBox.getItems().addAll(list);