1 files changed, 137 insertions, 0 deletions
diff --git a/media/admin_media/js/admin/ordering.js b/media/admin_media/js/admin/ordering.js
new file mode 100644
index 0000000..53c42f3
--- /dev/null
+++ b/media/admin_media/js/admin/ordering.js
@@ -0,0 +1,137 @@
+addEvent(window, 'load', reorder_init);
+
+var lis;
+var top = 0;
+var left = 0;
+var height = 30;
+
+function reorder_init() {
+    lis = document.getElementsBySelector('ul#orderthese li');
+    var input = document.getElementsBySelector('input[name=order_]')[0];
+    setOrder(input.value.split(','));
+    input.disabled = true;
+    draw();
+    // Now initialise the dragging behaviour
+    var limit = (lis.length - 1) * height;
+    for (var i = 0; i < lis.length; i++) {
+        var li = lis[i];
+        var img = document.getElementById('handle'+li.id);
+        li.style.zIndex = 1;
+        Drag.init(img, li, left + 10, left + 10, top + 10, top + 10 + limit);
+        li.onDragStart = startDrag;
+        li.onDragEnd = endDrag;
+        img.style.cursor = 'move';
+    }
+}
+
+function submitOrderForm() {
+    var inputOrder = document.getElementsBySelector('input[name=order_]')[0];
+    inputOrder.value = getOrder();
+    inputOrder.disabled=false;
+}
+
+function startDrag() {
+    this.style.zIndex = '10';
+    this.className = 'dragging';
+}
+
+function endDrag(x, y) {
+    this.style.zIndex = '1';
+    this.className = '';
+    // Work out how far along it has been dropped, using x co-ordinate
+    var oldIndex = this.index;
+    var newIndex = Math.round((y - 10 - top) / height);
+    // 'Snap' to the correct position
+    this.style.top = (10 + top + newIndex * height) + 'px';
+    this.index = newIndex;
+    moveItem(oldIndex, newIndex);
+}
+
+function moveItem(oldIndex, newIndex) {
+    // Swaps two items, adjusts the index and left co-ord for all others
+    if (oldIndex == newIndex) {
+        return; // Nothing to swap;
+    }
+    var direction, lo, hi;
+    if (newIndex > oldIndex) {
+        lo = oldIndex;
+        hi = newIndex;
+        direction = -1;
+    } else {
+        direction = 1;
+        hi = oldIndex;
+        lo = newIndex;
+    }
+    var lis2 = new Array(); // We will build the new order in this array
+    for (var i = 0; i < lis.length; i++) {
+        if (i < lo || i > hi) {
+            // Position of items not between the indexes is unaffected
+            lis2[i] = lis[i];
+            continue;
+        } else if (i == newIndex) {
+            lis2[i] = lis[oldIndex];
+            continue;
+        } else {
+            // Item is between the two indexes - move it along 1
+            lis2[i] = lis[i - direction];
+        }
+    }
+    // Re-index everything
+    reIndex(lis2);
+    lis = lis2;
+    draw();
+//    document.getElementById('hiddenOrder').value = getOrder();
+    document.getElementsBySelector('input[name=order_]')[0].value = getOrder();
+}
+
+function reIndex(lis) {
+    for (var i = 0; i < lis.length; i++) {
+        lis[i].index = i;
+    }
+}
+
+function draw() {
+    for (var i = 0; i < lis.length; i++) {
+        var li = lis[i];
+        li.index = i;
+        li.style.position = 'absolute';
+        li.style.left = (10 + left) + 'px';
+        li.style.top = (10 + top + (i * height)) + 'px';
+    }
+}
+
+function getOrder() {
+    var order = new Array(lis.length);
+    for (var i = 0; i < lis.length; i++) {
+        order[i] = lis[i].id.substring(1, 100);
+    }
+    return order.join(',');
+}
+
+function setOrder(id_list) {
+    /* Set the current order to match the lsit of IDs */
+    var temp_lis = new Array();
+    for (var i = 0; i < id_list.length; i++) {
+        var id = 'p' + id_list[i];
+        temp_lis[temp_lis.length] = document.getElementById(id);
+    }
+    reIndex(temp_lis);
+    lis = temp_lis;
+    draw();
+}
+
+function addEvent(elm, evType, fn, useCapture)
+// addEvent and removeEvent
+// cross-browser event handling for IE5+,  NS6 and Mozilla
+// By Scott Andrew
+{
+  if (elm.addEventListener){
+    elm.addEventListener(evType, fn, useCapture);
+    return true;
+  } else if (elm.attachEvent){
+    var r = elm.attachEvent("on"+evType, fn);
+    return r;
+  } else {
+    elm['on'+evType] = fn;
+  }
+}