jayflo jayflo - 5 months ago 788
AngularJS Question

Angular JS resizable div directive

My site will have multiple sections, each of which I intend to be resizable. To accomplish this I've made a "resizable" directive, e.g.:

<div class="workspace" resize="full" ng-style="resizeStyle()">
<div class="leftcol" resize="left" ng-style="resizeStyle()">


With a directive that looks something like:

lwpApp.directive('resize', function ($window) {
return {
scope: {},

link: function (scope, element, attrs) {
scope.getWinDim = function () {
return {
'height': window.height(),
'width': window.width()
};
};

// Get window dimensions when they change and return new element dimensions
// based on attribute
scope.$watch(scope.getWinDim, function (newValue, oldValue) {
scope.resizeStyle = function () {
switch (attrs.resize) {
case 'full':
return {
'height': newValue.height,
'width': (newValue.width - dashboardwidth)
};

case 'left':
return {
'height': newValue.height,
'width': (newValue.width - dashboardwidth - rightcolwidth)
};

etc...
};
}, true);

//apply size change on window resize
window.bind('resize', function () {
scope.$apply(scope.resizeStyle);
});
}
};
});


As you can see, this only resizes each div on window resize, and each directive has an isolate scope. This works fine for what it's built for, but ultimately I would like to make a subset of the divs resizable via a draggable bar. For instance

div1 div2
----------------
| || |
| || |
| || |
| || |
----------------
draggable bar in middle


On the the draggable bar's movement (in the horizontal direction), I would need to access both div1, div2's width presumably via the scope of a parent controller(?). My questions are:

1) Is this the "correct" way to go about making resizable divs in angluar? In particular, when the size of one div affects another?

2) I personally feel like the answer to (1) is "No, I am not doing it correctly because I cannot communicate between directives when each has an isolate scope." If this is true, how can I account for both window and draggable resizing between divs?

Thanks so much for any help you have have!

Answer

This question is old, but for anybody looking for a solution, I built a simple directive to handle this, for vertical and horizontal resizers.

Take a look at the Plunker

enter image description here

angular.module('mc.resizer', []).directive('resizer', function($document) {

    return function($scope, $element, $attrs) {

        $element.on('mousedown', function(event) {
            event.preventDefault();

            $document.on('mousemove', mousemove);
            $document.on('mouseup', mouseup);
        });

        function mousemove(event) {

            if ($attrs.resizer == 'vertical') {
                // Handle vertical resizer
                var x = event.pageX;

                if ($attrs.resizerMax && x > $attrs.resizerMax) {
                    x = parseInt($attrs.resizerMax);
                }

                $element.css({
                    left: x + 'px'
                });

                $($attrs.resizerLeft).css({
                    width: x + 'px'
                });
                $($attrs.resizerRight).css({
                    left: (x + parseInt($attrs.resizerWidth)) + 'px'
                });

            } else {
                // Handle horizontal resizer
                var y = window.innerHeight - event.pageY;

                $element.css({
                    bottom: y + 'px'
                });

                $($attrs.resizerTop).css({
                    bottom: (y + parseInt($attrs.resizerHeight)) + 'px'
                });
                $($attrs.resizerBottom).css({
                    height: y + 'px'
                });
            }
        }

        function mouseup() {
            $document.unbind('mousemove', mousemove);
            $document.unbind('mouseup', mouseup);
        }
    };
});