I got a problem using the TinyWebDB in App Inventor 2. Here's a Screenshot of the blockcode.
The goal of this Screen is to store a list(array) of images and later query them with a button but my problem starts already earlier. First there is a variable initialized called fotoList and declared as an empty list.
When this Screen initializes (left block) I store the empty fotoList under the tag FotoListTag. Then if the image under the tag "SteckbriefFoto" is not in this list -> getValue with tag "FotoListTag". Then he jumps into the block on the right and adds the photo .. other stuff not important .. at the end I store the list again in the TinyWebDB (and also in the TinyDB) with the tag "FotoListTag". Then it goes back to the block on the left where at the end I want to set an image.picture to the photo I stored in variable fotoList.
When I compile the code there is an error opening the page that says
Select list item: List index too large
Select list item: Attempt to get item number 1 of a list of length 0:()
I just don't get the problem with this code and i hope someone can help me.
For lists, valueIfTagNotThere should be create empty list instead of an empty string
On first run of your app, TinyDB is empty, which means, for tag = FotoListTag you get no value back, therefore this should be an empty list in the beginning.
Later you are trying to select the first item from the list (zahl is 1). As you know, the list is empty in the beginning, so probably you should add an if statement to check, if the list is not empty and only then select the first item... same for tag = Schriftlist.
You also have a timing issue. in Screen.Initialize you are trying to get a value from TinyWebDB. This is an asynchronous call, you get the result back in TinyWebDB.GotResult event and this takes a little bit (let's say 500 milliseconds), but meanwhile the complete blocks of the Screen.Initialize event will be executed. Probably you are expecting, that meanwhile tag = FotolistTag is not empty anymore, but this is not the case.
Related
I am attempting to capture all the list items in the WebList elements throughout the entire application, however, while below code works on the WebLists, it does not work on this WebEdit.
When you click on the WebEdit, a long list of values appear (similar to a WebList) and as you type for your value, the list becomes shorter. That is how the WebEdit was set up.
But now, how do I get the values in this list?
Here is the code I have for the WebLists:
Code
Set WebLink = Browser("browser").Page("page")
listval = WebLink.WebElement("xpath:= ((//*[contains(text(), 'Name')]))[1]/following::SELECT[1]").GetROProperty("all items")
listvalues = split(listval,";")
For j = LBound(listvalues,1) To UBound(listvalues,1)
'Print listvalues(j)
writeToTextFile(listvalues(j))
Next
ExitTest
The short answer is: it depends on the implementation.
The long one:
There is no universal widget for comboboxes (Like there is for edit fields or lists / selects, radiobuttons etc) => there is no universal solution but only guidelines.
You need to spy on those objects that appear in the combobox, see their XPath and / or other properties (the css classname they belong to, for example) and then execute a second query that selects all such items. Afterwards you have to extract the value of the selected elements; which might be as simple as getting the innertext Property or you may need to dig even deeper in the HTML hierarchies.
You would need to pay careful attention for synchronisation(Waiting until all search result elements appear), Filtering (using the XPath, Description Objects and ChildObjects method on your WebPage) and then extraction( getting the property /element that contains the actual value of that WebElement)
So again: These combobox solutions are not universal therefore without seeing their code the best what one can provide to you is universal guidelines which should work in most of the situations. (You would need some familiarity with Web Programming and the UFT Framework / Robot)
I have a TinyDB and in each tag of the TinyDB I have a list.
Each list has 3 items, each indexed as 1, 2 and 3.
I want to change the 3rd item, index 3.
So I have done the following
So I want to now save the change in the TinyDB
and have added a storeValue command as follows.
I figured out how to get the valuetoStore variable. As follows.
I had done this before, and thought it wrong because it still doesn't change the 3rd item in the list. But I've added a notifier to look at it and it's correct. So the "replace list item" isn't working how I thought it should. It isn't replacing the 3rd item with an "n."
Any ideas?
Thanks.
Your second try is almost correct. The only thing is, you should use the replace list item block together with the local variable name instead of retrieving the value again from TinyDB.
So what is the difference to your "solution"? Currently you assign the list to a local variable name. Then you use the replace list item block together with a list, you can't store somewhere (you are loading the list again from TinyDB). And in the end you store variable name (which doesn't have been modified at all) in TinyDB. Therefore the solution is to use the replace list item block together with the local variable name instead of retrieving the value again from TinyDB. Btw. a better name for the local variable name would be list.
Further tips
Also in the definition of the local variable name you should add a block, e.g. an empty string or 0
And if you want simplify a little bit, you can move the definition of the local variable name inside the for each loop. And alternatively of using the for each number loop, for list it's easier to use the for each item in list loop, see also the documentation. The list in your case is TinyDB1.GetTags.
As already said in the forum, generally I would use a list of lists and store it in only one tag in TinyDB
How to work with Lists by Saj
How to work with Lists and Lists of lists (pdf) by appinventor.org
I have a very poorly coded JSP that I am trying to run automation on. There are a series of checkboxes with names (no IDs) of "delete[x]" where X is the item number of the item populated. I am trying to select all the checkboxes so I can delete every entry. Here is what I have
check_boxes = []
check_boxes.push(#browser.checkbox(:xpath, "//input[contains(#name,'delete')]"))
puts check_boxes.size
check_boxes.each do |check_box|
check_box.set
The problem with this is it only selects the first instance (node) that matches the xpath to dump into the array. I know I can iterate through the xpath adding an index to the node, and then put a rescue in that drops me out when the index goes out of bounds, but that seems like the dirty way to do it.
I know there is an "as" tag that gets a set of anchors and i was wondering if there was a method like that for taking the whole selection of checkboxes
I don't think the problem is the xpath itself. It is the #browser.checkbox that is causing only the first checkbox to be returned.
If you want all matching checkboxes, you should use (notice the plural):
#browser.checkboxes
Note that checkboxes returns a collection of checkboxes. Unless you are doing something really fancy, you usually do not need to convert it to an array.
You can simply do:
#browser.checkboxes(:name => /delete/).each do |checkbox|
checkbox.set
end
How can I change my array's indices to start from 1 instead of 0. I am trying to fetch news from a site (JSON) and after parsing it:
#news = JSON.parse(Net::HTTP.get(URI.parse('http://api.site.com/news?format=json')))
But to see the individual news title, I have to do #news["items"][0] for the first link's title. Is it possible to change that behavior so when I do #news["items"][1] it shows me the first link's title?
You should intercept user input and adjust entered value to map to a correct array element. In general, you should always validate user input and check if it makes sense.
I'm creating a report in vfp. The report contains grouping. In the end of each group, i draw a line. Each row in the detail band doesn't contain any line, only at the end of each group. The problem is when the group expand to the next page, in the previous page i want to draw a line at the bottom. Like this :
(page 1)
group A
name, etc
x1,etc
x2,etc
???how do I add line here?
(page 2)
group A
name,etc
x3,etc
x4,etc
group B
name,etc
y1,etc
y2,etc
I've tried to place the line in the page footer band, but the last line of the report doesn't have exact position, so it doesn't look nice.
Hope I described the situation clear enough. Thank You for taking the time to help me.
Without some significant smoke-and-mirrors trickery: running the report twice, once hidden and track where the breaks are via function calls in the report, and then again for production, its not EASILY done.
The only thing I could suggest is putting a line at the TOP of a PAGE FOOTER which prints on EVERY page. How long have you been working with VFP. Depending, I MIGHT be able to guide you through it.
Ok, here are the steps I would take. This is under the assumption that you are pre-querying the results for your report and ordering them by some means into a temporary report cursor. You need to add 2 columns to your query as place-holders and be sure your do your cursor as " INTO CURSOR READWRITE " as we will be writing to this from within the report... that is the trick.
Next, modify your report. Go to the detail band and put a single line at the bottom of it. Adjust as needed if you need a few pixels under the last detail element. Double click the line and get to the tab where it allows you to put in a "Print When" condition for the line. Enter one of the new column names called "ShowLine" (but without the quotes).
Now, the "hook" for smoke and mirrors. Create another textbox field output in the report detail. It can be as small as 2 pixels wide and never actually prints anything. It can be put at the beginning or end of the report detail, no matter, just as long as its in the detail band. Double click it to bring up what it will print. In the expression, enter the following... WhatPageAmIOn( _PageNo )
This will actually call a function we'll add to your program which writes back to your report cursor... I'll hit that next.
Now, the code. The following is a sample snippet of code I've written to query the data for the report, have the extra columns, and put into a READWRITE cursor. From that, I run the report but to NOCONSOLE so it doesn't actually visually do anything, just runs in the background. It then cycles through and looks for the break between each page and goes backward 1 record from the break and stamps that record as "ShowLine" = .T... Then run the report again as normal and you have your one line appearing in the detail band regardless of a data group, but always the last data line at the end of each page.
Here's the code
*/ Query your data, order by whatever,
*/ but tack on the two extra fields and make it READWRITE
select;
YourData,;
AnotherField,;
MoreData,;
.f. as ShowLine,;
00000 as WhatPage;
FROM ;
YourData;
ORDER BY ;
WhateverForYourReport
INTO ;
CURSOR C_RptData READWRITE
*/ Pre-run the report NOCONSOLE so your windows don't get messed up / scrolled
REPORT FORM YourReport NOCONSOLE
*/ now, go back to the cursor that your report ran with
SELECT C_RptData
*/ set a variable for the first page you are looking to find a break for.
*/ in this case, the first detail that APPEARED on page 2.
lnLastPage = 2
*/ Start at top of the report cursor file and keep going until we reach
*/ the end of file where the LOCATE can no longer find "Pages".
GO TOP
DO WHILE NOT EOF()
*/ find the first record on ex: Page 2
LOCATE FOR WhatPage = lnLastPage
*/ Did we find one?
IF FOUND()
*/ Yes, go backwards 1 record
SKIP -1
*/ This is the last detail that appeared on the page before it (ie: pg 1)
*/ Mark this line as ok to "ShowLine" the next time the report is run.
replace ShowLine WITH .T.
*/ Now, advance the page counter to look for the NEXT page break...
*/ ex: between page 2&3, 3&4, 4&5, etc...
lnLastPage = lnLastPage +1
ENDIF
ENDDO
*/ Run your final version of the report
REPORT FORM YourReport Preview (or print)
RETURN
Here's the only hook below to track/update the page associated with the detail. I don't know if you have a main "SET PROCEDURE TO" file, or just a bunch of free .PRG files all in your project, or even if your reporting is done from within a PRG file itself. however, all you need is this function to be included in any of those locations. For simplest test, I would just create it as a stand-alone .prg file (if you are NOT using SET PROCEDURE, or doing your report within a PRG file and not from within a class method/event).
FUNCTION WhatPageAmIOn
LPARAMETERS lnPage
replace whatPage WITH lnPage
RETURN ""
As in the original description, the report is going to include a field in the detail band based on a function "WhatPageamIOn" and passes the parameter of _PageNo which is the internal VFP variable that keeps track of the current report page that is typically used in report header / footers. So, as each detail is getting processed, we are "STAMPING" the detail data with whatever the page is. We return an empty string "" so nothing actually gets printed, yet we've hooked what we needed. From this, the loop finding the first record at the beginning of every page (starting at page 2), and skipping backwards to the last entry for the prior page and we're done.
Good luck.