When we will use DrawItem for a listbox?
Normally, if the listbox is ownerdraw, we will use DrawItem. What are the other senarios we use drawitem?
To elaborate on Rashmi Pandit; A ListBox with override DrawItem can also be used to 'visualize' objects. In a project I'm working on, a ListBox is used to display rows from a database. Each row / item is visualized using formatted Strings, Icons etc.
Overriding DrawItem (and MeasureItem!) is ideal for this purpose. Of course, the internal structure has to be tweaked a bit (the standard Items property cannot be used for objects), but it is certainly worthwhile.
Message WM_DRAWITEM is sent only to owner-drawn List boxes.
You can use DrawItem when you want to override the default implementation and custom the way a listbox is drawn. For e.g. in the list there might be some item which should is the default item and you would want it to be highlighted so that the user knows it is the default item.
Here's an eg for a combo in C#: Higlighting a particular item in a combo box
Related
Can someone advise whether #SetViewInfo can be used with click to sort columnns.
When a view is filtered using #SetViewInfo it removes the column sorting options, thus removing the functionality of the view. Even when resetting to all records the column sorting option is not available, however I have overcome this by opening a second view then opening the original view, messy but it works. I am using View Action Buttons. (Not sure how to store the value in a Check Box Action).
Filtering
#SetViewInfo([SetViewFilter]; "userinitials"; "$80"; 1)
Resetting.
#SetViewInfo([SetViewFilter];"";"$80";1);
#SetTargetFrame("frame");
#Command([OpenView]; "DummyView"); //Needed to get the click to sort back
#Command([OpenView]; "OriginalView")
Also if the view is already sorted on another column, ie not in a categorised state no records are found. I don't want to have to remove the sorting options on my views. The help implies you don't need to have the view categorised. But I cannot get it to work if I don't, ie if I use 0 on an uncategorised view nothing happens.
From Help
isCategory - Number. Boolean value. Required in a Standard Outline view; not for use in Calendar views. 1 indicates that the column in the columnName value is a category. 0 indicates that it is not.
Is the #SetViewInfo limited as I have found or am I missing something?
Any help appreciated.
Yes, #SetViewInfo has limitations. As far as I know, you cannot keep the sorting when you use SetViewFilter. I also believe you need to have the view categorized, at least in older versions of Notes this was the case, if I remember correctly.
Limitations like this is why I personally don't use #SetViewInfo very often (if at all), I try to use other ways to display filtered documents.
One way I have handled it in the past is to use a special form with a rich text field, and then I build a list of filtered documents (e.g. through a search) and render the list of documents in the rich text item.
I use this technique to do that: http://blog.texasswede.com/dynamic-tables-in-classic-notes/
I have a field in a Database that is set as a varchar(1), and it is bound to a non editable textbox in acumatica. I would like it so that when the value of the field is equal to 'A', the value displayed in the textbox in Acumatica is something longer such as 'Apple'. The user will not be editing the textbox so I do not need this to work in reverse.
From my research, I see that LabelListAttribute might be the attribute I am looking for. Can anyone give me an example on how one creates a new 'LabelProviderType' or 'LabelValuePair' to feed into this attribute.
Additionally, am I just better off in copying the combobox example from the T100 class (Page 76) and disabling it? I would rather this work within a textbox
Thanks
For the use case you are describing you should indeed use a PXDropDown control bounded to a DAC field decorated with PXStringList attribute as described in T100 Configuring a Combo Box example.
Is it possible to force the user to select only one value from a filter ?
For a radio button filter as below, is it possible to remove the buttons all & none and make sure that only one Choice is selected ?
you cannot change the existing filter features or functionality without developing a custom extension for a new filter control.
that said, you can certainly emulate a filter using what's called a Property Control and a Data Limiting Expression. for single selection, you're stuck with either a Dropdown control or a Listbox (single select) control.
you would need to...
create a Text Area Visualization on the page somewhere
insert a Listbox or Dropdown Property Control into the Text Area Visualization
create a Document Property with the same data type as your filter column and associate it to the Property Control. you can set this to Unique Values in Column or write in your own Fixed values.
open the Properties dialog on the visualization you'd like to filter and navigate to the Data page
scroll down to Limit Data Using Expression and use an expression like [MyFilterColumn] = "${MyDocumentProperty}" (quotes are required for string values; if numeric then omit quotes)
Please add this CSS in the HTML page of the spotifre to remove all and none
.ColumnFilter .sf-element-filter-item:last-of-type { display:none; }
.ColumnFilter .sf-element-filter-item:first-of-type { display:none; }
Another way to force the users to select one option is to add a Show/Hide in the visualization like this: Hide if UniqueCount([Field]) is greater than 1
I am making a list using LinearLayout and would like to add several "person"-objects to my "list"
I need to be able to click on an object in this list an pull out the person object or at least the personId to be able to find the specific person in my database.
How do I go about doing this?
I have tried using a TextView but it is too simple to contain all of the desired values.
I have also tried using a ListView but I have several LinearLayout next to each other. The ListView scroll individually and therefore I can't use them
Here is an image:
As you can see I am trying to make a grid of sorts each column is a linearview and at the moment so are each row.
I realize there is a grid but I need to be able to fit objects in where I want them and I am too inexperienced to write my own adapter for the gridview
You can achieve this using a ListView with a custom ArrayAdapter.
Check out this example.
Instead of the Weather class, use your own Person object and make the necessary modifications.
Edit:
After reading your edit, I can see that you have some kind of Grid. So my best guess would be to use a GridView with a custom adapter.
Since you are getting your data from a database, you might as well use a custom CursorAdapter.
But I still haven't figured out what you're trying to do.
It seems that you want all the cells to be visible. That would only mean you have a small/finite amount of cells, and in that case a GridView wouldn't be any better than a for loop that adds views to a layout.
I have a QTreeWidget which uses the QAbstractItemView.ExtendedSelection property, allowing users to shift click and control click items.
I'd like to preform actions on these items based on the order in which they are selected-- I can think of ways to design my own systems to determine the selection order, but is there a native function/property that will return a list of items sorted via selection order?
Thank you for your advice!
The underlying selection model naturally preserves in the order in which items are selected. So you don't really need to do anything special - just iterate over them like this:
for item in treewidget.selectedItems():
print item.text(0)