Not able to scroll using TouchScroll

[padmaja2812]

Hi,
I am trying to use TouchScroll.
Only mouse location is changing according to the coordinates but it not holding left click and scrolling.
Can you help to resolve the issue.

Thanks
Padmaja

[NickAb]

Could you please provide some extra details:

1. How do you call TouchScroll, what values do you use for offset?
2. How much of the element you are trying to scroll is on screen? Or are you scrolling without element (i.e. form centre of the screen)?
3. Have you tried TouchFlick, does it work?
4. How do you check that coordinates have changed?

[padmaja2812]

-With command executor we call touchscroll and values are
Offset Values
{X = 240 Y = 427}
{X = 240 Y = 335
{X = 240 Y = 242}
{X = 240 Y = 150}
{X = 240 Y = 57}
{X = 240 Y = -35}
{X = 240 Y = 28}
-No we are just trying to scroll to get element in view port.
-No we haven't tried touch flick but will try with that as well.
-the position of cursor changes after every leftdown().

[NickAb]

Can you clarify what cursor are talking about? Driver should not be able to move the cursor of your host system (arrow pointer) as it sends mouse actions directly to virtual machine corresponding to the emulator you are using.

[padmaja2812]

cursor means the arrow pointer.

[NickAb]

Cursor pointer from host OS or some kind of cursor pointer in your app?

What version of the driver do you use? Winium.StoreApps.Driver.exe --version

[padmaja2812]

Cursor i m referencing to is the mouse pointer from host OS.
I am running outer server from code (VS) in debug mode.

Thanks
Padmaja

[NickAb]

You host OS pointer should not be moving anywhere, because driver sends mouse events directly to emulator virtual machine. Could you please make a screen capture of what is happening? I can not quite understand how can it be that your host OS cursor is moving.

As a workaround you can find a scrollable container element that is a parent of the element you want to scroll into the view. And then use ExecuteScript command with automation: ScrollPattern.Scroll, the scrollable container element, {"v": "smallIncrement", "count": 10}.
Here is an example in python, we will be scrolling some listbox that contains the item we want to scroll into the view:

list_box = self.driver.find_element_by_id('MyListBox')
self.driver.execute_script('automation: ScrollPattern.Scroll', list_box, {"v": "smallIncrement", "count": 10})

More info on ExecuteScript can be found in wiki page

[padmaja2812]

It's not the OS pointer moving, only the pointer in the virtual machine/emulator is moving and when I am trying to scroll the element that pointer is only moving in the scroll direction and not scrolling.

[NickAb]

Are you trying to scroll some custom element? Have you tried ExecuteScript with ScrollPattern?

[padmaja2812]

I am trying to scroll the current screen but it is not scrolling at all, as you can see in the recording shared. The reason, I see is that we are not using touch events but are using mouse events which don't perform scrolling in Windows 10 mobile.
https://youtu.be/Reh6AugXrNI

[NickAb]

Please try using ExecuteScript command with automation: ScrollPattern.Scroll as a wrokaround, here is example in python:

listbox = self.driver.find_element_by_id("MyListBox")
        scroll_info = {"v": "smallIncrement", "count": 10}
        self.driver.execute_script("automation: ScrollPattern.Scroll", listbox, scroll_info)

It seems that on Windows 10 any mouse action (movement) we send releases previously hold left button. This issues seems to be affecting Windows 10 only. It might take some time to find another solution for touch simulation.

Sorry it took so long, please let me know if ExecuteScript workaround works for you.

[padmaja2812]

Hi,
Apologies for replying so late.
This approach is not working for custom controls.
"Element does not support IScrollProvider control pattern interface."
do we need to implement this with each custom control?

Thanks
Padmaja

[NickAb]

Make sure that you are passing a scrollable container to ExecuteScript, not a contained element you are trying to scroll in or out. If an element is inside custom scrollable container then yes, a custom scrollable container has to implement IScrollProvider.

We will look into fixing scrolling on Windows 10, but my first ideas for quick fix did not work, so it might take time. If you have resources for implementing relevant patterns for you custom elements then it might be a good idea as it will improve accessibility of your app and probably make testing easier.

[padmaja2812]

Thanks for suggestion.
I created a scorllvierwerautomationpeer where i have implemented IScrollProvider.
But now i m getting
"Error reading JArray from JsonReader. Current JsonReader item is not an array: StartObject. Path", line 1, position 1."
Request from outer server
{
"script": "automation: ScrollPattern.Scroll",
"args": [
{
"ELEMENT": "31160197-1"
},
"{'v': 'smallIncrement', 'count': 10}"
],
"SESSIONID": "e362ca2f-1f04-4624-ab28-06cc21d76acd"
}
I think error_ is because input format.Can you help me with correct input parameters?

[NickAb]

scroll_info should not be a string. It should be a dictionary. What language do you use to write tests? I assume you are writing tests in Java.

Map<String, Object> scrollInfo = new HashMap<String, Object>();
map.put("v", "smallIncrement");
map.put("count", 10);

driver.executeScript("automation: ScrollPattern.Scroll", element, scrollInfo);