I am using https://github.com/tongyy/react-native-draggable to drag my element but my issue is that i want to drag the object at snap points.
for example:- if i drag my element for 0 to 100 the if should move from 1 to 10 then 20 then 30 and so on but current i am getting like 1 to 1.0023 to 1.045 to 2.23 and so on.
i want dont want to drag smoothly i want to drag at certain snap points.
Related
Docs says When pagingEnabled is set to true, the scroll view stops on multiples of the scroll view's size when scrolling. This can be used for horizontal pagination.
I am trying to implement a carousel with say 15 items. I want to display only 5 items at a time. Every time the user scrolls, I want to scroll to the next 5 items
I am trying to figure out how the page size determined? in case of the above example, I want to set the page size to 5
What are the mandatory properties to set to achieve pagination?
I am trying to create a view panel where it displays 3 pictures horizontally and 2 pictures vertically (3x2 grid) out of a collection of 100 images whos image file location I get from a dataset. Basically I want to be able to scroll through the collection so that I can select an image from the collection and then work with it.
What control will allow me to do this as obviously I don't want to be loading 100 images into memory just to be able to scroll a panel?
I am using a tag for continues moving of image horizontally. Suppose I have a 5 images than it moving fine but after completion of last image move there is a big gap to start scrolling from 1 st image.How can i mange this?
In wxWidgets, is it possible to have on a wxPanel, an object that contains a mouse click event which moves the objects to another location when activated? The movement should be seen as an animation, e.g. Sliding from its initial location to the next location (Using wxTimer?). Is this by any means, possible?
Basically you need to change the position of whatever you are displaying smoothly so a timer at 25 Hz and then update the position a proportion of the movement each time, e.g. if you need to move from 0,0 to 100,200 smoothly in 4 seconds then updating your position by +1,+2 each timer event should do nicely. You may find that you need to invalidate a display area that includes the position before the move and after it to force a redraw but give it a try without first.
I have a scrollView that shows images set by url. Now I only want the visible image and the previous and next image to be pre-loaded onto the scrollView to reduce memory usage. How do I accomplish this?
If you use a UITableView instead of a UIScrollView, you can create your own UITableViewCell type which loads 1 image in its content.
The advantage is that only the visible UITableViewCells (those currently displaying on the device's screen) are loaded into the system memory, so it won't use too much resources.
Here is one of the many CustomCell Tutorials you will find on the Internet.
When I did the same I created a UIScrollView of 3 times the size. Just big enough to hold the 3 images, the one that is currently displayed and the next siblings to the right and the left.
Those images are pre-loaded if they have not been loaded before. So the user has some smooth and responsive look & feel.
When the user scrolls to the next one, and he can scroll for one only, then I re-arrange the view. Lets say images 1, 2 and 3 are in the scroll view and 2 is visible, so 1, 2 and 3 are (pre-)loaded. The user scrolls to the right. Image 3 will be visible. As soon as it becomes fully visible I set the visible rect of the scroll view to the middle again. Now Image 2 is the left most one, image 3 is visible and image 4 is placed as the right most one and pre-loaded.
When the end of the list of images is reached, meaning when the 1st or last one are displayed, then I place a dummy view on the left most or right most place respectivly that is a simple text view showing "no more images".
Unfortunately I cannot share that code.