Angular SlickGrid is it possible to use pagination AND set row color based on value? - css

Question

Is it possible to set the background color for a row in slickgrid (based on data values) AND use pagination? For angular-slickgrid package.
I used getItemMetadata as suggested multiple other (old) posts - example SlickGrid: How to loop through each row and set color based on the condition?.
This code:
metadata(old_metadata_provider) {
return function(row) {
var item = this.getItem(row);
var ret = (old_metadata_provider(row) || {});
if (item) {
ret.cssClasses = (ret.cssClasses || '');
if ("attribute" in item) {
return { cssClasses: 'redRow' }; //redRow is in styles.css
}
}
return ret;
}
}
and the call is:
this.dataViewObj.getItemMetadata = this.metadata(this.dataViewObj.getItemMetadata);
It works correctly. However, when I turn pagination on, the color does not work as expected. I read that SlickGrid re-uses the same row elements when scrolling or paginating and will overwrite the styles associated with them. Is there another way to do it? Thanks for any help on this.
I tried adding the following code, after reading suggestion from ghiscoding, but the colors are still not working when pagination is enabled.
angularGridReady(angularGrid: AngularGridInstance) {
this.angularGrid = angularGrid;
this.dataViewObj = angularGrid.dataView;
this.gridObj = angularGrid.slickGrid;
this.checkRowBackgroundColor(); //where I call the metadata function from my previous post, if the dataView object is defined.
//I added this code:
var self = this;
this.dataViewObj.onPagingInfoChanged.subscribe(function (e, dataView, grid) {
self.gridObj.invalidate();
self.gridObj.render();
});
}

Answer 1

Try this approach:
angularGridReady(angularGrid: AngularGridInstance) {
this.angularGrid = angularGrid;
this.dataViewObj = angularGrid.dataView;
this.gridObj = angularGrid.slickGrid;
// check color change logic for the first time page load
this.checkRowBackgroundColor();
// use arrow function so that 'this' works properly
this.dataViewObj.onPagingInfoChanged.subscribe((e, dataView, grid) => {
// check your color change logic every time Paging Info Changed
this.checkRowBackgroundColor();
});
}
Inside your checkRowBackgroundColor:
checkRowBackgroundColor() {
// ... any of your logic
// get metadata
this.dataViewObj.getItemMetadata = this.metadata(this.dataViewObj.getItemMetadata);
// rerender the grid after getting new metadata
this.gridObj.invalidate();
this.gridObj.render();
}
Your problem should be solved now. As I have not tested on my local machine, I can not give guarantee. You can checkout original documentation of angular-slickgrid about this specific topic here: Dynamically Add CSS Classes to Item Rows