Solution to page scrolling after ExtJs 4.2.1Grid row editing_html/css_WEB-ITnose

Some time ago, we made a new thing in the company. Our development team chose the ExtJs4.2.1Mvc mode. We encountered many problems during the development process (it was unavoidable to avoid unprofessional demand personnel making various comments. (needs decided on the brain), after checking the API, they have been solved one by one. Now, the problems encountered and solved during the development process are recorded for future review, and also for reference by netizens who are new to ExtJs. If the description is not in place or If there are any mistakes, please correct me! (Note: The methods mentioned below are all methods in the ExtJs library, not native to js)

Since the entire project uses ExtJs’ MVC, the project is basically js files (there are nearly 100 custom js files, not to mention the ExtJs library), which causes the page to load very slowly, not to mention performance issues. This is a long-standing problem!

Question 1:

Regarding the problem of Grid page scrolling, there is now an Ext.grid.Panel. There are two types of data in this grid, one is usable Data, the other type is disabled data, the available data is displayed normally, and the disabled is displayed in gray (the gray display can be achieved by using the getRowClass attribute of the grid's viewConfig, seems like this:

　getRowClass: function(record,rowIndex ,rowParams,store){
                                                                                                                                                                     'row-valid'

);

The two types of data in this grid can be edited. After editing, in order to display the two types of data without confusion, the store.sort() method is used , this method will cause the grid content to scroll. The user does not want to always scroll around when editing the grid, so we were asked to find a way, so I spent two days to perfect this requirement (in the process, 3 Method 1: Use focusRow(row, [delay]) directly to focus on a row;

Method 2: Get the current editor row and the record of the first row in the grid, and then use the getOffsetsTo() method to calculate the vertical distance between the two rows of records in the grid, and then let the scroll bar scroll to the position of this distance value, that's all! This logic is implemented in the grid's viewConfig configuration, and then called through grid.getView().XXX() after editing the row. Add the following two methods in viewConfig:

//Scroll Grid to the specified Record

scrollToRecord:function(record){

var index = this.ownerCt.getStore().indexOf(record ); var firstRow = Ext.get (this.getNode(0)); //The first row in the grid

var row = Ext.get(this.getNode(rowIndex)); //The current editing row
var distance = row.getOffsetsTo(firstRow )[1]; //Get the vertical distance
//this.scroller.dom.scrollTop = distance; This.scroller does not seem to have this attribute in Ext4.x, does it only exist in 3.x?
this.getEl().setScrollTop(distance); //Set the scroll bar
}

Method three: Although the first two methods can also meet the needs, they are not perfect. Now let’s talk about the most The perfect solution and the simplest.

Before editing the row, first get the position of the current scroll bar: var scrollTop = grid.getView().getEl().getScrollTop(); // Before sorting, the scrollTop of the grid scroll bar

After editing, roll the scroll bar back to the original position: grid.getView().getEl().setScrollTop(scrollTop);

If in our Grid There are fixed columns, that is, if some columns are set with the locked: true attribute, the above method cannot be used and will be invalid, because the view of the locked grid cannot be obtained directly. It is divided into lockedView and normalView. When scrolling , both views need to be scrolled, otherwise the table will be misaligned~~ After knowing this, other settings will be the same as above!

Question 1 completed!