Extending Gridster to allow dimensions to be resized. See https://github.com/ducksboard/gridster.js/pull/77

gridster.resize-patch.js

(function($) {
    $.Gridster.generate_stylesheet = function(opts) {
        var styles = '';
        var max_size_x = this.options.max_size_x;
        var max_rows = 0;
        var max_cols = 0;
        var i;
        var rules;

        opts || (opts = {});
        opts.cols || (opts.cols = this.cols);
        opts.rows || (opts.rows = this.rows);
        opts.namespace || (opts.namespace = this.options.namespace);
        opts.widget_base_dimensions || (opts.widget_base_dimensions = this.options.widget_base_dimensions);
        opts.widget_margins || (opts.widget_margins = this.options.widget_margins);
        opts.min_widget_width = (opts.widget_margins[0] * 2) +
            opts.widget_base_dimensions[0];
        opts.min_widget_height = (opts.widget_margins[1] * 2) +
            opts.widget_base_dimensions[1];


        /* generate CSS styles for cols */
        for (i = opts.cols; i >= 0; i--) {
            styles += (opts.namespace + ' [data-col="'+ (i + 1) + '"] { left:' +
                ((i * opts.widget_base_dimensions[0]) +
                (i * opts.widget_margins[0]) +
                ((i + 1) * opts.widget_margins[0])) + 'px;} ');
        }

        /* generate CSS styles for rows */
        for (i = opts.rows; i >= 0; i--) {
            styles += (opts.namespace + ' [data-row="' + (i + 1) + '"] { top:' +
                ((i * opts.widget_base_dimensions[1]) +
                (i * opts.widget_margins[1]) +
                ((i + 1) * opts.widget_margins[1]) ) + 'px;} ');
        }

        for (var y = 1; y <= opts.rows; y++) {
            styles += (opts.namespace + ' [data-sizey="' + y + '"] { height:' +
                (y * opts.widget_base_dimensions[1] +
                (y - 1) * (opts.widget_margins[1] * 2)) + 'px;}');
        }

        for (var x = 1; x <= max_size_x; x++) {
            styles += (opts.namespace + ' [data-sizex="' + x + '"] { width:' +
                (x * opts.widget_base_dimensions[0] +
                (x - 1) * (opts.widget_margins[0] * 2)) + 'px;}');
        }

        return this.add_style_tag(styles);
    };

    $.Gridster.add_style_tag = function(css) {
        var d = document;
        var tag = d.createElement('style');

        tag.setAttribute('generated-from', 'gridster');

        d.getElementsByTagName('head')[0].appendChild(tag);
        tag.setAttribute('type', 'text/css');

        if (tag.styleSheet) {
            tag.styleSheet.cssText = css;
        } else {
            tag.appendChild(document.createTextNode(css));
        }
        return this;
    };

    $.Gridster.resize_widget_dimensions = function(options) {
        if (options.widget_margins) {
            this.options.widget_margins = options.widget_margins;
        }

        if (options.widget_base_dimensions) {
             this.options.widget_base_dimensions = options.widget_base_dimensions;
        }

        this.min_widget_width  = (this.options.widget_margins[0] * 2) + this.options.widget_base_dimensions[0];
        this.min_widget_height = (this.options.widget_margins[1] * 2) + this.options.widget_base_dimensions[1];

        var serializedGrid = this.serialize();
        this.$widgets.each($.proxy(function(i, widget) {
            var $widget = $(widget);
            this.resize_widget($widget);
        }, this));

        this.generate_grid_and_stylesheet();
        this.get_widgets_from_DOM();
        this.set_dom_grid_height();

        return false;
    };
})(jQuery);

thanks for this! with some other mods I made it work nice: https://github.com/gcphost/gridster-responsive

Hi OwlyCode,

I was just trying to include your code in my existing gridster environment. It will fail because there is no more an "$.Gridster" reference.

Could you please give me a hint or fix your code? This would be nice.

Thank you!

@Irthen You can use fn. instead of $.Gridster

hello @OwlyCode, your code is doing fine, but when im resizing a widget & the container size is change, widget that i'm resize is not follow up the container size, how to fix this?

Thanks so much! This is completely what I want.

gridster.resize-patch.js:2 Uncaught TypeError: Cannot set property 'generate_stylesheet' of undefined... it showing above error message when this is included

@josephkuruvilla seems to replace $.Gridster with fn.

Where should I include this file?

Hmm where should I put this, doesn't seem working.. I changed $.Gridster to $.fn.