Currently working on a project where I want to implement Auto Scrolling in a view. Is this possible with React Native? I have searched the internet and have not come across anything that shows this capability.
Most Stack Overflow questions and YouTube videos deal with scrolling between different views (not within the same view), scrolling to the bottom (with Scroll To), infinite scrolling, or scrolling responsively. But I haven't been able to find anything dealing specifically with auto-scrolling within a given view.
Please let me know. Thank you in advance.
Something that just came to my mind would be like...
Store current x and y offset values of the scrollview in the component's state, setState every 'x' seconds with the new offset and call scrollTo() method of scrollview. That would change the x and y offset repetitively and make it looks like is auto scrolling.
PS: I know is not a full solution and should be posted in the comments section but I'm not able to comment yet... hope this helps anyway :)
Related
I'm trying to create a viewer in react-three-fiber with react-three/drei where I can switch between OrbitControls and TrackballControls.
The problem is that when switching from TrackballControls to OrbitControls, the axis that the camera rotates around changes as of course the TrackballControls change the up-vector when moving around.
I created a couple of minimal examples in codesandbox to explain my approach to solve this and to show where I'm stuck.
Base Case
This shows the initial attempt to switch between the different control types:
https://codesandbox.io/s/r3f-camera-controllers-base-neu07
Attempt #1
Obviously, this does not work as it is, so I tried resetting the up-vector to (0, 1, 0) and calling lookAt(). This seems to work initially as the camera reorients itself correctly (this is how it should look like). However, it does not rotate around the correct axis and instead moves in strange arcs. See here:
https://codesandbox.io/s/r3f-camera-controllers-set-up-vector-yps4k
Attempt #2
For this question it was suggested to create a new camera which I also tried but ultimately it lead to the same result. This here is my attempt at creating a new camera and copying some values to the new camera:
https://codesandbox.io/s/r3f-camera-controllers-reset-camera-3cih0
Any help appreciated. Thanks!
After a couple of days, I finally figured out a way to achieve what I want.
Instead of trying to remove the different controls, I just enable and disable them separately. I can then call the reset() functions on both Controls via a ref if the control prop changes. To retain the camera position, I can just temporarily store it before resetting the controls.
You can find an example here.
I've looked far and wide and can't find the answer to this:
Use case is scrolling a mouse wheel to zoom in.
Every time the wheel is moved a notch, an update is issued with a new level of zoom.
If a new setState is called before the previous one is finished and displayed, it will start processing the next call. However, react will not display the results of the previous render on the screen!
So, if i molest the scroll wheel, it will push dozens of render calls before actually showing anything on the screen, causing very poor user experience. (Here's the video: https://youtu.be/YRVK8uoVml0)
I don't know hot to force it to draw each render on screen.
And please, not answers like "You shouldn't be doing that", or "Just fire one update at a time". Only answer if you actually know the answer. Thank you.
I have a chart which looks like this:
When I zoom into a section, the labels disappear:
However, I can get the labels back by scrolling all the way to the right and releasing the mouse:
And then when I scroll back to the left, the labels are all visible:
This behaviour is just super weird am I'm completely dumbfounded as to what would cause this, or even how to debug.
Does anyone have any ideas on what I could try to fix this? I'd like the labels to be shown as in the last image, but when first zooming.
It looks like others have had similar issues, so I'm going to try combining several answers I found online to maybe help fix your issue.
John (DevExpress Support) says:
It appears that the AutoLayout feature leads to this issue. Please set the ChartControl.AutoLayout property to False. This should make axis label elements visible.
https://www.devexpress.com/Support/Center/Question/Details/T328948/x-axis-labels-disappear-in-chartcontrol
Valdemar (DevExpress Support) says:
I suggest that you use the Axis2D.ResolveOverlappingOptions properties. Set AllowHide to False:
[XAML]
<dxc:XYDiagram2D.AxisX>
<dxc:AxisX2D >
<dxc:AxisX2D.Label>
<dxc:AxisLabel>
<dxc:Axis2D.ResolveOverlappingOptions>
<dxc:AxisLabelResolveOverlappingOptions AllowRotate="True" AllowStagger="True" AllowHide="False" />
</dxc:Axis2D.ResolveOverlappingOptions>
</dxc:AxisLabel>
</dxc:AxisX2D.Label>
</dxc:AxisX2D>
</dxc:XYDiagram2D.AxisX>
https://www.devexpress.com/Support/Center/Question/Details/Q489042/chart-axis-labels-disappearing-when-chart-is-resized
SharpStatistics says:
The only way I could replicate the problem you describe is by setting the x axis Label.style interval to a specific value, say,
area1.AxisX.LabelStyle.Interval = 100;
and then when I zoom in on the chart if the zoomed x axis section is less than 100 I don't see any lables.
loi-se (the OP) replies:
Thanks for your suggestion! But as far as i know i don't set the xaxis labelstyle anywhere, i just use: Chartarea1.AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount
This works fine in the case of the yaxis but the xaxis seems to behave on its own will. Maybe i should renew my .net framework installation and get the latest version of the chart component? Any other suggestions?
https://social.msdn.microsoft.com/Forums/vstudio/en-US/d345d4a3-a4be-4b41-9c83-9a9d9dbb69b9/the-labels-of-the-xaxis-are-disappearing-when-i-zoom-in?forum=MSWinWebChart
This one is for SSRS reports, but I'm assuming it uses the same (or similar library) and supports the link right above this one.
When designing an SSRS Report using Chart you may notice that some of the labels whether in X or Y axis are not being displayed, this is because it’s so smart that it detects what you actually want (not!).
To display all labels follow the steps below:
Right click either the X or Y axis, Click Properties:
Set the Interval to 1:
Viola!
https://randypaulo.com/2012/02/20/ssrs-chart-label-missing-xy-axis-missing/
That's about all I can find that are similar, without spending a bunch more time researching this. Hopefully something here helped!
I am working on a project that requires a slider control that corresponds to an image and or a multitude of div objects. The spacing of the slider is irregular (the steps could be [1,4,7,13,14,16...]). Also the steps will correspond to specific spots on an image and or to a specific div object. The perfect slider would be dynamic and re-size with the screen but that may be actually impossible.
The hard part is that I am unable to use JQueryUI, instead I am limited to using controls that work with AngularJS.
I have been looking for hours and cannot find anything that would be a good starting point. So my question is whether anyone has found a good slider control to use with AngularJS?
This one fits some of your criteria
angularjs-slider
I'm currently trying to build my personal website with Silverlight 3 and I've got this idea that you should be able to flip through the content in a certain way. I haven't seen exactly what I wanted before, so I uploaded a screenshot of the design for you guys to get a better idea of what I'm talking about:
Picture of desired effect http://www.bo-mortensen.dk/bmdkflip.jpg
As you can see it's more or less a carousel on the X axis. I've seen a fair number of carousel tutorials, but it seems to be quite "complicated" for what I'm looking for.
My main problem is that I fail to understand how to make this thing dynamic. I can sure do the flipping animations, but when it comes to the best approach of making the bottom page (the mirrored one) the previous etc, I'm a bit lost :)
I'm looking for any good advice on how to make this dynamic in such a way that the only thing that needs to be changed is the content itself (text, pictures etc) Also, I believe that each page/usercontrol should be using the same two (flip up and flip down) animations, if that's possible at all?
Hope I made myself clear on this - it's late after all ;) If not, just let me know and I'll see if I can elaborate!
Looks like you are looking for a Flippable 3D control. So check out my blog for one and you can tweak it to make vertical rotation.
http://jobijoy.blogspot.com/2009/04/3d-flipper-control-using-silverlight-30.html