Correctly calling setGridWidth on a jqGrid inside a jQueryUI Dialog

Question

I have a jQueryUI dialog (#locDialog) which has a jqGrid ($grid) inside it. When the Dialog opens (initially, but it gets called whenever it opens), I want the $grid to resize to the size of the $locDialog. When I do this initially, I get scrollbars inside the grid (not inside the dialog).

If I debug the code, I see the width of the $grid is 677. So, I call setGridWidth() again and check the width and now I have 659, which is 18px less, which is the size of the scroll area for the jqGrid (Dun-dun-dun..)

When I rezie the dialog, I resize the grid as well, and everything is happy - no scrollbars, except where necessary.

My dialog init code:

$locDialog = $('#location-dialog').dialog({
    autoOpen: false,
    modal: true,
    position: ['center', 100],
    width: 700,
    height:500,
    resizable: true,
    buttons: {
                "Show Selected": function() {alert($('#grid').jqGrid('getGridParam','selarrrow'));},
                "OK": function() {$(this).dialog('close');},
                "Cancel": function() {$(this).dialog('close');}
             },
    open: function(event, ui) {
        $grid.setGridHeight($(this).height()-54); 
          // No idea why 54 is the magic number here
        $grid.setGridWidth($(this).width(), true);
    },
    close: function(event, ui) {

    },
    resizeStop: function(event, ui) {
        $grid.setGridWidth($locDialog.width(), true);
        $grid.setGridHeight($locDialog.height()-54);
    }
});

I am curious if anyone has seen this before. Really, it isn't the end of the world if I initially have unnecessary scrollbars at first, but it is just odd that when I call setGridWidth initially, it doesn't take into account the scroll area of 18px.

As far as the magical number 54, that is the number I had to subtract from the height of the dialog value to get the grid to render without unnecessary scrollbars.

---

I think it may be a timing issue, though this doesn't make a lot of sense. Perhaps I should call an event once the grid is completely loaded. This may ensure it calculates its width correctly.

Answer 1

There are some cases, where jqGrid calculate the width a little incorrect. Mostly I have problems with grid width, but in some cases on IE6 also with the height. So I have to write a small function to fix the problem.

var fixGridWidth = function (grid) {
    var gviewScrollWidth = grid[0].parentNode.parentNode.parentNode.scrollWidth;
    var mainWidth = jQuery('#main').width();
    var gridScrollWidth = grid[0].scrollWidth;
    var htable = jQuery('table.ui-jqgrid-htable', grid[0].parentNode.parentNode.parentNode);
    var scrollWidth = gridScrollWidth;
    if (htable.length > 0) {
        var hdivScrollWidth = htable[0].scrollWidth;
        if ((gridScrollWidth < hdivScrollWidth))
            scrollWidth = hdivScrollWidth; // max (gridScrollWidth, hdivScrollWidth)
    }
    if (gviewScrollWidth != scrollWidth || scrollWidth > mainWidth) {
        var newGridWidth = (scrollWidth <= mainWidth)? scrollWidth: mainWidth;  // min (scrollWidth, mainWidth)
        // if the grid has no data, gridScrollWidth can be less then hdiv[0].scrollWidth
        if (newGridWidth != gviewScrollWidth)
            grid.jqGrid("setGridWidth", newGridWidth);
    }
};

var fixGridHeight = function (grid) {
    var gviewNode = grid[0].parentNode.parentNode.parentNode;
    //var gview = grid.parent().parent().parent();
    //var bdiv = jQuery("#gview_" + grid[0].id + " .ui-jqgrid-bdiv");
    var bdiv = jQuery(".ui-jqgrid-bdiv", gviewNode);
    if (bdiv.length) {
        var delta = bdiv[0].scrollHeight - bdiv[0].clientHeight;
        var height = grid.height();
        if (delta !== 0 && height && (height-delta>0)) {
            grid.setGridHeight(height-delta);
        }
    }
};

var fixGridSize = function (grid) {
    this.fixGridWidth(grid);
    this.fixGridHeight(grid);
};

In this code "main" is the id of parent div inside of which the grid will be created. In the code I test (scrollWidth > mainWidth) whether the width of "main" allow increasing of jqGrid width.

Correct place to call this function is inside of loadComplete:

loadComplete: function() {
    var gr = jQuery('#list');
    fixGridSize(gr);
}

and inside of "done", if you use 'columnChooser' if use use Query('#list').jqGrid('columnChooser');

(in this example I use also 'gridResize'.)