I have a long form with comboboxes and buttons that add element to the form. Every time combobox's value gets upldated or elements get added, it scrolls up to the top of the form. I want the scrollbar to retain its position. I tried saving current scroll position by doing
this.myForm.getScrollPosition();
But I get getScrollPosition is not a function error.
Any help on this?
If you are using extjs there is a way to manipulate the scroll using the Ext.dom.Element class, each component in Extjs inherits from it, then if you add a new component that modifies the height or width of your form, you can first get the height and width of that component using:
var newcompwidth = comboboxexample.getWidth();
var newcompheight = comboboxeample.getHeight();
Later you can modify the scroll value using scrollTo method like this:
myformcontainer.getEl().scrollTo('Top',myformcontainer.getEl().getScroll().top - newcompheight);
myformcontainer.getEl().scrollTo('Top',myformcontainer.getEl().getScroll().left - newcompwidth);
there are other methods like scrollBy or scroll but I didn't test it yet, I guess this will help you.
the docs: http://docs.sencha.com/extjs/4.1.0/#!/api/Ext.dom.Element
Related
I have an app that uses ExtJS 3.3.0. It uses an EditorGridPanel in which after the store is reloaded - I would like it to preserve the scroll position of the grid rather than sending it back up to the top.
Because this is an earlier version of ExtJS - this DOES NOT work:
viewConfig: {
preserveScrollOnRefresh: true
}
So far the only thing I can come up with is to save the position of the scroll bar prior to loading - and then reset the position once the reload is complete.
I can get as far as saving the position:
var scrollPos;
bodyscroll: function(sl, st) {
scrollPos = st;
},
However I can't figure out how to set the position afterwards.
Any suggestions?
Thanks in advance.
There might be multiple ways to do this but one way is to use the scroller element, which is accessible through the grid's gridview. See fiddle here: Grid scoll save/restore.
To get scroll value (which you've already got figured out):
var top = grid.getView().scroller.getScroll().top;
To restore:
grid.getView().scroller.scrollTo('top',top);
I was wondering whats the best way around dynamically hiding some menu items. At the moment I have 6 items just in a matrix layout row. I want to have 3 items aligned left and 3 items alligned right. If one of the items is set to not visible I want it to move accross. I've done something similiar in a horizontal layout and setting the visibility to hidden. I was wondering if this would work with a vertical layout? Having trouble trying to figure out exactly how I would do it as I'm quite new to UI5 xml css and javscript. Any help would be great.
Also I'm having one other issue unrelated to this, I cant seem to bind my json model to my xml fragment, if I use the same code on my normal xml view it prints out the model data. But on my fragment it just prints it like {person>/fullName} any ideas ?
Belongs to your second question.
Maybe your binding was quoted on copy and paste? Check the native XML Code.
If no data are shown (not "{person>/fullName}"), add dependent to connect the models of your view
var oFragment = sap.ui.xmlfragment(sFragment, "fragmentName", this);
oView.addDependent(oFragment);
I have a page with many elements (forms and tables)
When I want add a row in a table I scroll the page to the table, I press a button to add a row, edit the info in a popup and press OK.
Then I insert the new row in the model and refresh() the model.
At this point the page auto scroll at the top, but I don't want this behavior!
I want that the page stay in the same Y position!
I see that sap.m.page has scrollTo function https://openui5.hana.ondemand.com/docs/api/symbols/sap.m.Page.html#scrollTo
but I don't know how take the position before the refresh()
The Page does unfortunately not have an API to get the current scroll position, but the idea is a good one we consider.
As a workaround you could access some private method of the Page - but only if you accept the risk that it breaks with a future version of UI5:
page.getScrollDelegate().getScrollTop()
To make it safer you should verify both methods exist before calling them and also check the returned value for plausibility. Then you are pretty safe that in the worst case it will again scroll to the top in some future UI5 version.
you have to fill the iTime parameter in scrollTo function - e.g. srollTo(100, 1) - then it works
using 0 for iTime does not work
I have a DataGrid in an AbsolutePanel.
I set it size via myDataGrid.setSize("100px", "231px");
It is supposed to show 140 data items, but it only shows like 60 or something like that, with automatic vertical scroll bar presented.
But why it shows only part of the data, not full set?
I assume you use a default constructor for the DataGrid. By default the page size is 50, so it will only display 50 records.
Either you use another cosntructor (DataGrid(int pageSize)) or you add a Pager (i.e. SimplePager)
I am using GWT 2.4's new DataGrid in a project. I configured the DataGrid with a pagesize of 50.
The available screen is not big enough to display all items and thus a vertical scrollbar is shown (this is actually the main purpose for using a DataGrid in the first place).
I attached a SingleSelectionModel to the DataGrid in order to be able to select items.
This works fine so far.
However I also have another widget with which the user can interact. Based on that user action a item from the DataGrid should be selected.
Sometimes the selected item is not in the visible screen region and the user has to scroll down in the DataGrid to see it.
Is there any way to automatically or manually scroll down, so that the selected item is visible?
I checked the JavaDocs of the DataGrid and found no appropriate method or function for doing that.
Don't know if this works, but you could try to get the row element for the selection and use the scrollIntoView Method.
Example Code:
dataGrid.getRowElement(INDEX_OF_SELECTED_ITEM).scrollIntoView();
The answer above works pretty well, though if the grid is wider than your window and has a horizontal scroll bar, it also scrolls all the way to the right which is pretty annoying. I was able to get it to scroll down and stay scrolled left by getting the first cell in the selected row and then having it scroll that into view.
dataGrid.getRowElement(dataGrid.getVisibleItems().indexOf(object)).getCells().getItem(0).scrollIntoView();
Don't have time to try it out, but DataGrid implements the interface HasRows, and HasRows has, among other things, a method called setVisibleRange. You just need to figure out the row number of the item that you want to focus on, and then set the visible range from that number n to n+50. That way the DataGrid will reset to put that item at the top (or near the top if it is in the last 50 elements of the list backing the DataGrid). Don't forget to redraw your DataGrid.
Have you already looked at this? If so, I'd be surprised that it didn't work.
Oh, and since this is one widget talking to another, you probably have some messaging set up and some message handlers so that when the user interacts with that second widget and "selects" the item, the message fires on the EventBus and a handler for that message fixes up the DataGrid along the lines I've described. I think you'll have to do this wiring yourself.
My solution, a little better:
dataGrid.getRow(model).scrollIntoView();
I got a Out of bounds exception doing the above.
I solved it getting the ScrollPanel in the DataGrid and used .scrollToTop() and so on on the ScrollPanel. However, to access the ScrollPanel in the DataGrid I had to use this comment:
http://code.google.com/p/google-web-toolkit/issues/detail?id=6865
As Kem pointed out, it's annoying the "scrollToRight" effect after the scrollIntoView. After me, Kem's solution gives a better behaviour than the base one as usually the first columns in a table are the more meaningful.
I improved a bit his approach, which scrolls horizontally to the first column of the row we want to be visible, by calculating the first visible column on the left before applying the scroll and then scrolling to it.
A final note: Columns absolute left is tested against "51". This is a value I found "experimentally" by looking the JS values in the browser's developer tool, I think it depends on the table's style, you may need to change/calculate it.
Below the code:
public void scrollIntoView(T next) {
int index = datagrid.getVisibleItems().indexOf(next);
NodeList<TableCellElement> cells = datagrid.getRowElement(index).getCells();
int firstVisibleIndex = -1;
for(int i=0; i<cells.getLength() && firstVisibleIndex<0;i++)
if(UIObject.isVisible(cells.getItem(i)) && (cells.getItem(i).getAbsoluteLeft() > 51) && (cells.getItem(i).getAbsoluteTop() > 0))
firstVisibleIndex = i;
cells.getItem(firstVisibleIndex>=0? firstVisibleIndex : 0).scrollIntoView();
}