viewportSize | Get the size of the CSS viewport using JavaScript | Frontend Framework library
kandi X-RAY | viewportSize Summary
kandi X-RAY | viewportSize Summary
Allows you to get the width and height of the CSS viewport using JavaScript.
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viewportSize Examples and Code Snippets
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Trending Discussions on viewportSize
QUESTION
I am just trying to get deals items from this amazon URL :
when I open this link in browser and write the query in console, it works:
document.querySelectorAll('div[class*="DealItem-module__dealItem_"]')
but when I try to fetch this through this phantomjs
script, it seems to always returning nothing:
ANSWER
Answered 2021-May-31 at 18:23According to the documentation on the evaluate method in PhantomJS
Note: The arguments and the return value to the evaluate function must be a simple primitive object. The rule of thumb: if it can be serialized via JSON, then it is fine.
Closures, functions, DOM nodes, etc. will not work!
Instead, you should perform your length calculation inside the evaluate, then return the simple primitive length.
QUESTION
I'm building an app with Flutter and am trying to listen to the pan gestures of the map to get the center of the map view and place a pin on the center. The code I've tried is as follows:
...ANSWER
Answered 2021-May-31 at 09:50The code snippet from your question is not part of the search_app example, so I assume it is your code. However, what you are trying to do will not work properly:
- _
hereMapController.viewportSize
is giving you the size in pixels of the map view. It is not providing geographic coordinates. Although you can useviewToGeoCoordinates()
to convert pixel points to geographic coordinates, there is an easier way: TheMapCamera
gives you always the current center location for free via the targetCoordinates property. - The pan gesture handler is executed multiple times. It would not be advisable to call
_addPoiMapMarker()
each time theGestureState.end
event occurs. Instead, you can reposition an existing marker by setting new coordinates.
From your code it looks like you want to get the address of the map view's center. I assume you do not want to recenter a marker each time the map has stopped moving. So, in your case it may be better to draw a fixed widget at the center of your map view, regardless of it's current coordinates - then it will not move or lag behind any events, e.g. you may get from a MapCameraObserver.
The log messages you are receiving are only warnings, so they should not have an effect on the pan gesture event you are receiving.
QUESTION
I want to open a 3D model and make its background transparent, so that I can see the UI behind the SceneView. I've tried this code, but sceneView becomes white, not transparent.
...ANSWER
Answered 2021-May-26 at 11:29Thanks George_E, your idea with SpriteKit worked perfectly. Here is the code:
QUESTION
I can't make my MTKView clear its background. I've set the view's and its layer's isOpaque to false, background color to clear and tried multiple solutions found on google/stackoverflow (most in the code below like loadAction and clearColor of color attachment) but nothing works.
All the background color settings seem to be ignored. Setting loadAction and clearColor of MTLRenderPassColorAttachmentDescriptor does nothing.
I'd like to have my regular UIView's drawn under the MTKView. What am I missing?
...ANSWER
Answered 2021-May-17 at 09:09Thanks to Frank, the answer was to just set the clearColor property of the view itself, which I missed. I also removed most adjustments in the MTLRenderPipelineDescriptor, who's code is now:
QUESTION
I'm trying to save the camera image from ARFrame
to file. The image is given as a CVPixelBuffer. I have the following code, which produces an image with a wrong aspect ratio. I tried different ways, including CIFilter to scale down the image, but still cannot get the correct picture saved.
Camera resolution is 1920w x 1440h. I want to create a 1x scale image from the provided pixel buffer. I am getting 4320 × 5763, 4320 × 3786
How do I save capturedImage
(CVPixelBuffer) from ARFrame to file?
ANSWER
Answered 2021-Feb-17 at 19:11There are a couple of issues I encountered when trying to pull a screenshot from an ARFrame:
- The
CVPixelBuffer
underlined in the ARFrame is rotated to the left, which means that you will need to rotate the image. - The frame itself is much wider than what you see in the camera. This is done because AR needs a wider range of image to be able to see beyond what you see for it's scene.
E.G: This is an image taken from a raw ARFrame
The following below may assist you to handle those two steps easily: https://github.com/Rightpoint/ARKit-CoreML/blob/master/Library/UIImage%2BUtilities.swift
The problem with these are that this code uses UIGraphicsBeginImageContextWithOptions
, which is heavy util.
But if performance are not your main issue(Let's say for an AR Experience) these might be suffice.
If performance is an issue, you can do the mathematical calculation to understand the conversion you will need to do, and simply cut the image needed from the original picture and rotate that.
Hope this will assist you!
QUESTION
I needed to define 2 ScrollBars for one ScrollViewer UWP ScrollBar styles. Styles work but there was a problem, I lost the ability to scroll with touch. After I touch the Thumb, it is no longer attached to the mouse wheel and can only be moved with a mouse click.
...ANSWER
Answered 2020-Dec-11 at 15:30I changed the style a little and the scrolling worked
QUESTION
I know there's two other similar questions, but mine just isn't working and I'm not sure why.
I'm trying to serve a blob image saved in base64 on a nodejs server.
It's just not serving and I have no clue why. If I comment out the "writeHead" part it shows the base64 like it should. I've tried it with data:image/jpeg
and without. I've also tried converting it to a buffer. Just can't seem to figure it out.
The base64 image is less than 200 kb and is saved in a mediumblob
Can anyone see what I'm doing wrong
...ANSWER
Answered 2020-Nov-24 at 02:06If the database stores a data:image/png;base64,xxxx
string then it would need to be converted back to the binary data to be part of a response with a content type of image/png
(like a regular image file).
QUESTION
How can I get the size and position of a widget during the build()
method? In the following code, I want to draw rectangle in the CustomPaint
widget that is centered and is a certain percentage of the remaining area of the viewport, which is everything below below the Text
widget, marked (A)
. I can get the width from MediaQuery
, but how would I get the remaining height after (A)
? I would have to know the position of the Text
widget.
This answer does not work because Flutter throws an exception when attempting to retrieve the RenderBox
during build().
ANSWER
Answered 2020-Oct-16 at 19:09The second argument of the paint
method is the size of the CustomPaint
widget. You just need to make sure your widget gets the right size.
To make the CustomPaint
take the rest of the space in the Column
, you will need to wrap it in an Expanded
widget:
QUESTION
I have a window that contains a ScrollViewer
, What i want is to swap the vertical ScrollBar
side to the left if the window is on the right side of the screen and vice-versa.
Here is my current ScrollViewer
template in a ResourceDictionary
:
ANSWER
Answered 2020-Jul-18 at 09:46Positioning the ScrollBar
inside of your ScrollViewer
depending on the window position requires you to know:
- The Size of the containing window to know where the center is
- The window location to determine whether it crossed the center of the screen or not
- The screen size to know where the center of the screen even is
What makes it addionally difficult are the following factors
- You need to get the information from your
ScrollViewer
that is a child of the window that could change - Size changes and location changes can also change the side of the screen
- Screen sizes are difficult to get in WPF, especially in multi-monitor setups
I will show you a working example to achieve what you want for the primary screen. Since this is another block for a another question, you can start from there and adapt it to your requirements.
In order to tackle the issues above, we will use the SizeChanged
and LocationChanged
events to detect changes of a window in size and location. We will use the SystemParameters.PrimaryScreenWidth
to get the screen width, which can, but may not work in multi-monitor setups with different resolutions.
Your control will alter the default ScrollViewer
behavior and appearance. I think it is best to create a custom control to make it reusable, because dealing with this in XAML with other techniques might become messy.
Create a new type AdaptingScrollViewer
that inherits from ScrollViewer
like below. I have commented the code for you to explain how it works.
QUESTION
I am running my webdriverio 5 test with aplitools and I get this error:
...ANSWER
Answered 2020-Jun-26 at 17:21This is Sophie with Applitools.
I see that you have both @applitools/eyes-webdriverio which is our SDK for WDIO 5 and @applitools/eyes-selenium which is for Selenium JS.
If you would like to use wdio SDK you can remove @applitools/eyes-selenium from your package JSON and in your tests script take the Configuration object from the @applitools/eyes-webdriverio package.
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