--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/gallery/canvas.js	Sat Feb 16 23:07:31 2008 -0500
@@ -0,0 +1,177 @@
+var canvas_mousemove_temp;
+var canvas_keyup_temp;
+var CANVAS_KEY_ESC = 27;
+
+function canvas_click(obj)
+{
+  var click_x = mouseX - $(obj).Left();
+  var click_y = mouseY - $(obj).Top() + getScrollOffset();
+  
+  if ( obj.canvas_in_draw )
+  {
+    canvas_close_draw(obj, click_x, click_y);
+  }
+  else
+  {
+    canvas_open_draw(obj, click_x, click_y);
+  }
+}
+
+function canvas_open_draw(obj, x, y)
+{
+  obj.canvas_box_obj = canvas_create_box(obj, x, y, 1, 1);
+  obj.canvas_in_draw = true;
+  obj.onclick = function(e)
+  {
+    canvas_click(this);
+    var onclose = this.getAttribute('canvas:oncomplete');
+    if ( onclose )
+    {
+      eval(onclose);
+    }
+  }
+  canvas_replace_mousemove(obj);
+}
+
+function canvas_replace_mousemove(obj)
+{
+  canvas_mousemove_temp = document.onmousemove;
+  canvas_mousemove_temp.box_obj = obj;
+  canvas_keyup_temp = document.onkeyup;
+  document.onmousemove = function(e)
+  {
+    canvas_mousemove_temp(e);
+    canvas_redraw_box(canvas_mousemove_temp.box_obj);
+  }
+  document.onkeyup = function(e)
+  {
+    if ( typeof(canvas_keyup_temp) == 'function' )
+      canvas_keyup_temp(e);
+    
+    if ( e.keyCode == CANVAS_KEY_ESC )
+      canvas_cancel_draw(canvas_mousemove_temp.box_obj);
+  }
+}
+
+function canvas_restore_mousemove()
+{
+  document.onmousemove = canvas_mousemove_temp;
+  document.onkeyup = canvas_keyup_temp;
+}
+
+function canvas_create_box(obj, x, y, width, height)
+{
+  var inner_width = width - 2;
+  var inner_height = height - 2;
+  var top = $(obj).Top() + y;
+  var left = $(obj).Left() + x;
+  
+  // draw outer box
+  var div_outer = document.createElement('div');
+  div_outer.className = 'canvasbox';
+  div_outer.style.border = '1px solid #000000';
+  div_outer.style.position = 'absolute';
+  div_outer.style.width = String(width) + 'px';
+  div_outer.style.height = String(height) + 'px';
+  div_outer.style.top = String(top) + 'px';
+  div_outer.style.left = String(left) + 'px';
+  
+  div_outer.rootY = y;
+  div_outer.rootX = x;
+  
+  var div_inner = document.createElement('div');
+  div_inner.style.border = '1px solid #FFFFFF';
+  if ( IE )
+  {
+    div_inner.style.width = '1px';
+    div_inner.style.height = '1px';
+  }
+  else
+  {
+    div_inner.style.width = String(inner_width) + 'px';
+    div_inner.style.height = String(inner_height) + 'px';
+  }
+  
+  div_outer.appendChild(div_inner);
+  
+  obj.appendChild(div_outer);
+  return div_outer;
+}
+
+function canvas_redraw_box(obj)
+{
+  if ( !obj.canvas_box_obj )
+    return false;
+  var rel_x = mouseX - $(obj).Left();
+  var rel_y = mouseY - $(obj).Top() + getScrollOffset();
+  var new_width = rel_x - obj.canvas_box_obj.rootX;
+  var new_height = rel_y - obj.canvas_box_obj.rootY;
+  var rootX = obj.canvas_box_obj.rootX;
+  var rootY = obj.canvas_box_obj.rootY;
+  // Limit dimensions to width - origin_x and height - origin_y
+  if ( new_width + rootX > $(obj).Width() )
+    new_width = $(obj).Width() - rootX;
+  if ( new_height + rootY > $(obj).Height() )
+    new_height = $(obj).Height() - rootY;
+  // If going to the top or left of the origin, avoid negative width/height by moving the box
+  if ( new_width < 1 )
+  {
+    new_width = rootX - rel_x;
+    obj.canvas_box_obj.style.left = String(mouseX + 2) + 'px';
+  }
+  if ( new_height < 1 )
+  {
+    new_height = rootY - rel_y;
+    obj.canvas_box_obj.style.top = String(mouseY + getScrollOffset() + 2) + 'px';
+  }
+  obj.canvas_box_obj.style.width = String(new_width) + 'px';
+  obj.canvas_box_obj.style.height = String(new_height) + 'px';
+  new_width = new_width - 2;
+  new_height = new_height - 2;
+  if ( IE )
+  {
+    var nw = new_width;
+    var nh = new_height;
+    obj.canvas_box_obj.firstChild.style.width = String(nw) + 'px';
+    obj.canvas_box_obj.firstChild.style.height = String(nh) + 'px';
+  }
+  else
+  {
+    obj.canvas_box_obj.firstChild.style.width = String(new_width) + 'px';
+    obj.canvas_box_obj.firstChild.style.height = String(new_height) + 'px';
+  }
+}
+
+function canvas_close_draw(obj, x, y)
+{
+  canvas_restore_mousemove();
+  obj.canvas_in_draw = false;
+  obj.canvas = {
+    top: $(obj.canvas_box_obj).Top() - $(obj).Top(),
+    left: $(obj.canvas_box_obj).Left() - $(obj).Left(),
+    width: $(obj.canvas_box_obj).Width(),
+    height: $(obj.canvas_box_obj).Height()
+  }
+  obj.onclick = function(e)
+  {
+    canvas_click(this);
+  }
+}
+
+function canvas_cancel_draw(obj)
+{
+  canvas_restore_mousemove();
+  obj.canvas_in_draw = false;
+  obj.removeChild(obj.canvas_box_obj);
+  obj.canvas_box_obj = null;
+  obj.onclick = function(e)
+  {
+    canvas_click(this);
+  }
+  var ga = obj.getAttribute('canvas:oncancel');
+  if ( ga )
+  {
+    eval(ga);
+  }
+}
+