Is it possible to set up a Vaadin Grid with details (like in the Item Details example https://vaadin.com/docs/latest/components/grid) to stretch instead of displaying a scroll? I need to let the Grid grow as much as it needs to. Please tell me how to implement it.
P.S
I may only disable the visual scroll with grid.setVerticalScrollingEnabled(false); but it doesn't help with what I'm looking for. I also need to stretch the grid to avoid the grid scrolling at all. I'd like to use the entire page scrolling instead of grid personal scrolling.
There is a flag you can set
setAllRowsVisible
public void setAllRowsVisible(boolean
allRowsVisible) If true, the grid's height is defined by its rows. All
items are fetched from the DataProvider, and the Grid shows no
vertical scroll bar.
Note: setAllRowsVisible disables the grid's virtual scrolling so that
all the rows are rendered in the DOM at once. If the grid has a large
number of items, using the feature is discouraged to avoid performance
issues.
Parameters:
allRowsVisible - true to make Grid compute its height by the number of
rows, false for the default behavior
Related
After I setup the a Grid with all the columns with setAutoWidth(true) and I execute grid.recalculateColumnWidths() this will auto-adapt the columns width with the content of the columns but only for the rows that are visible in the grid.
What happen is that scrolling rows in the grid I can find some cells with content larger than the content on the first visible rows and they were not auto-adapted and so the content is truncated (es FOO...)
Considering that I am using ListDataProvider, so all the rows are loaded into memory when I build the grid, why it is not calculating the right width for every column considering all the rows?
Is this a normal behaviour? It is possible to change it to consider all the rows when it is calculating the columns width?
I am using Vaadin version 14.
Thanks for the help
Yes,
this is the normal behaviour of the vaadin grid and is (at least for the 23.x) documented that way
https://vaadin.com/api/platform/23.2.6/com/vaadin/flow/component/grid/Grid.Column.html#setAutoWidth(boolean)
The relevant part, why it's not looking at all items in the grid is here:
For performance reasons the column width is calculated automatically only once when the grid items are rendered for the first time and the calculation only considers the rows which are currently rendered in DOM (a bit more than what is currently visible). If the grid is scrolled, or the cell content changes, the column width might not match the contents anymore.
You can however "retrigger" a width calculation
You can manually trigger the auto sizing behavior again by calling Grid.recalculateColumnWidths().
I am using Vaadin Flow 14.6.2, the material theme, and custom CSS styling in my application. When loading a grid that has a cell that has content that wraps 5 times, when the grid initially loads the grid rows overlap, truncating the information in the cell that contains wrapped data. Looking at the CSS this is due to CSS "transform: translateY(#px)" setting that is too small onto the Grid's TR (row) tags. As a point of reference, the grid places a translateY of 76 pixels on the second row.
Screen shot of grid with overlapping rows
Selecting a row in the table or resizing the browser will cause the grid to refresh and the translationY value will be recalculated, increasing the translateY value to 118 pixels, and the grid will display all rows with the appropriate spacing.
Screen shot of grid after selecting a row
Is this a defect in the grid where the row offsets are not initially calculated to the correct height?
I am not sure how to debug this further or if there are any workarounds to trigger the grid to recalculate row sizes so that it may display correctly from the start. I tried programmatically selecting the first row and the result was that the first row displayed correctly but subsequent rows were truncated.
I'd try adding a Div element inside the cell using a ComponentRenderer, and put the white-space: normal and word-break: break-word on that element. Since the grid supports adding components of any size, and should adjust row height according to the heighest component, this may trigger initial calculation.
I was able to work around this issue by changing how this page is navigated to. A change was made to a parent view to trigger navigation using an anchor instead of a button. With an anchor a new UI is created and then the grid is added to it, but with the button the existing UI is reused. There is something in the display of the grid on a new UI or something related to the difference in navigation that triggers this problem. Reverting back to using a button is a superior solution as it solves this problem and does not trigger creation of a new UI.
I have an array of 'n' number of items. I am displaying them in a horizontal stack view, having fixed width of the superview.
Issue is, when the number of items are more, then the horizontal stack view is not displaying all of them.
I need to display all the items of an array in some UI placeholder horizontally with some decent amount of spacing in between. If the items are more they should come in the next line.
Will horizontal stack view be suitable for my requirement ? If not, then which UI component should I use? Example will be appreciated.
Adding to the answer of #DrMickeyLauer, If you want to make your UI look better with some eye catching animation while viewing the items then go for iCarousal.
Take a look at this URL for the sample implementation https://github.com/nicklockwood/iCarousel
UICollectionView is exactly what you're after. Use it with the standard UICollectionViewFlowLayout in horizontal mode.
It will then display all its elements filling "lines" from top to bottom, thus achieving a grid layout, which seems like what you want.
I'm working on a project for a client. It's an iPad pdf reader. The client wants a collection view, but instead of scrolling vertically, he wants it to use a page control.
It's pretty hard to explain, but what I basically want is all the PDFs on the device in a grid, like on the iBooks app. When that grid overflows, I want to use a page control to display the extra elements on a second page (like in the weather app).
My thoughts on this were:
- Create a page control with one page.
- On that page, create a UICollectionView.
- If the number of elements is greater than 9 add a page to the page control and add another UICollectionView, until there are enough pages to display all elements.
However, this seems horribly inefficient, so my question is if there's a better way to do this.
If your goal is to scroll sideways you can just select that in the interface builder when you have the collection view selected. Then you can make the cell as big as you want. You can even enable paging on the collection view.
In the attributes inspector, right under layout is scroll direction. Set to horizontal.
I see lots of DB scroll bar questions, but never seem to find a definitive answer to this one.
There is no option (property) to add/hide DB grid scroll bars, either singly or jointly. The simply auto-appear when needed.
If I don't have enough rows to scroll, I would like my columns to fill the entire grid.
If I design it so then when a vertical scroll bar is added at run-time a horizontal scrollbar is auto-added too (since I just covered the right part of the right most column with a vertical scroll bar, we now need a horizontal scroll bar to see what I am covering).
One option is to design my grid such that there is enough space at the right hand size (how many pixels?) to accommodate a vertical scroll, but that is unsightly until there are enough rows to trigger a scroll bar (if ever).
It seems to me that the most aesthetically pleasing way would be start with a grid which is filled with columns at X pixels wide and increase its width to X + width of vertical scroll bar (or decrease the width of one/some of the grids columns by a total of width of vertical scroll bar) pixels when adding a new row causes the vertical scrollbar to appear.
Am I missing something? Is there a “correct” way to do this, or an industry standard way (I am not asking for a “best” way or anything too subjective, so please don’t close. I believe that a lot of people need to know this).
Is there anything in the standard TDBgrid to facilitate this?
Bonus: I subscribe to TMS components, so if there is a way to do this simply with TAdvDbgrid, that would be fine for me, but a general solution with TDBgrid would be fine.
Non-subjective question: Given that
- I do not want to increase the width of my TDBgrid
- and that I do not want a blank white column at the right when no vertical scroll bar is present
- and that I am willing to decrease the width of my right-most column in order to avoid a horizontal scroll bar appearing when a vertical scroll bar appears
... how do I do so?
[Update]
Ken was rightly awarded the answer becuse his solution is best for most users.
For those like me who already paid for a TMS subscription, I just noticed that their TDbAdvgrid component has a ScrollBars property and when I set it to ssVertical, it does what I want.
Now, if I could only figure out a good way to have fixed header row when it is the only row ...
TJvDBGrid (part of the JEDI JVCL) has this capability built in, and includes source code. It should be able to either do what you need, or give you the details needed to implement your own descendant.