I have multiple records which needs to be displayed as part of a search. A single result can contain multiple records associated to it. If there are multiple records I need to display the record with (+) and when clicked it further displays the list.
I would like to know what the best way is to implement ( I have checked Custom data grid ex: http://gwt.googleusercontent.com/samples/Showcase/Showcase.html#!CwCustomDataGrid but would like to use UI binder)
Once the user selects a record from the expanded list, how can we load that selected record?
Any pointer are appreciated..! ( Currently on GWT 2.2)
Widget list
Tree or maybe StackPanel seems like it would be useful here.
Related
I have some code that allows the user to perform a search by selecting a few checkboxes. A sql query is then created based on what checkboxes are checked. (Up to 5 checkboxes)
The data is then queried against a sqlite data.
The issue is now how do i populate the data into a listview (not knowing how many columns there will be ahead of time (Could be anywhere from 1 to 5)
All the examples I"ve seen is where the listView is created and you know exactly how many colummns are going to be returned.
A previous posted suggested to query all the records and then use if statements to determine if the value is null then hide column.
Is there any simple way to get the object, used to render given row in CellTable, by index of the row?
I am using AsyncDataProvider, and don't want to remember lists of data objects, returned from the server. Also I am using MultiSelectionModel, so several items could be selected there and I need to track out which one was clicked last.
I know the index of last clicked row, so I need to get the object, corresponding to the row, somehow.
getVisibleItem? possibly combined with getPageStart if you're using paging and you only know the absolute index.
For your use-case, maybe you could use a customized selection model whose setSelected tracks the last change.
I´m using GWT 2.4 with a DataGrid and a SimplePager along with a MultiSelectionModel. I want to implement a simple select-all-feature over all pages.
I´m only able to select all visible items on the current page. What is the best way to select all items on all pages?
I know the MultiSelectionModel stores the proxy keys provided by a ProvidesKey object in a HashMap. I think I have to request all proxy objects from server or at least all keys. But actually I don´t want to store information about the ProvidesKey´s getKey()-method on server-side. But I also can not access the MultiSelectionModel´s HashMap of the selected proxies´ keys. This all looks cumbersome, so is there a better way to solve this?
As mentioned in https://developers.google.com/web-toolkit/doc/latest/DevGuideUiCellWidgets#selection, one way to achieve this would be to implement your own SelectionModel (e.g. by extending AbstractSelectionModel or DefaultSelectionModel):
A complex implementation can handle "select all" across multiple pages using a boolean to indicate that everything is selected, and then keep track of negative selections.
Why do you need all keys for select all? When you select some objects from a list, you need to remember which ones are selected, but when you select all objects, you need a single Boolean:
// on click Select All button/checkbox
boolean selectAll = true;
// ask a user what he wants to do
// send a request to server with a parameter selectAll to update/delete all objects
Select all across multiple pages will work only if you are NOT lazy loading. First of all why do you need to select all? If you want to do some actions on all the grid data, you will already have the list and you can perform your actions on the list directly. Nonetheless you can select all the rows of the grid over multiple pages by iterating through the list and using the following API on each item.
public void setSelected(T item, boolean selected);
Note: This will work only if you are NOT lazy loading.
I have 2 select, I want the second select list loads based on selected value of first select. In another word first select is a list of objects, those objects each has a list of another objects. so I want load second list based on selected object of first select. I know that can be done using JQuery, but can I do this without JavaScript/JQuery?
Thanks in advance.
There is a tag that does this for you http://struts.apache.org/2.x/docs/doubleselect.html
Out of the box it probably uses Dojo API or uses a server side request to generate the second list. I have not used any of the JQuery UI in Struts.
No, you can't do this without Javascript. With static HTML you can't achieve this effect; drop-down fields on HTML forms come pre-loaded with their options, and are independent of other fields on the form.
following this tutorial http://www.netbeans.org/kb/docs/java/gui-db-custom.html#enhancements
it shows how to use a textbox to filter out the master table. Could anyone instruct me on how to do a similiar thing but use a dropdown to test against a specific column?
(ie a dropdown of countries, to filter by the country column?
thanks
depending on what the source is for the dropdown.
i assume the dropdown isn't used as part of the Jtable itself, but merely shows a list of unique data coming from one column of data?
in that case, you could get the Jtable's datamodel, and then walk through all the cells in the particular column, putting them in a hashmap with the string as the key. that way you have a list of (unfiltered) unique strings to use as the datamodel for the dropdownbox.
You could attach a model listener to the talbedatamodel to know when your list has to be updated as well.