Switched to using scriptaculous for dragging support.

* Moved inline CSS to public/plemp.css.
 * Improved default for initial random positions.
 * Replaced drag.js by dragreg.js which is going to do the position changes
   registration via the Draggables object.
 * Added Move effect for initial placing.
This commit is contained in:
Paul van Tilburg 2010-06-19 00:51:58 +02:00
parent 039bd6f0aa
commit 0555395095
4 changed files with 29 additions and 75 deletions

View File

@ -69,7 +69,9 @@ module Plemp::Views
xhtml_strict do
head do
title "Plemp!"
['drag', 'prototype', 'effects', 'controls'].each do |js|
link :rel => "stylesheet", :type => "text/css",
:media => "screen", :href => R(StaticXX, "public", "plemp.css")
['prototype', 'scriptaculous', 'dragreg'].each do |js|
script :src => R(StaticXX, "public", "#{js}.js"),
:type => "text/javascript"
end
@ -94,22 +96,17 @@ module Plemp::Views
if Positions.has_key? id
top, left = Positions[id]
else
top, left = ["#{rand(800)}px", "#{rand(400)}px"]
top, left = ["#{rand(300)}", "#{rand(700)}"]
Positions[id] = [top, left]
end
img :id => id,
:src => R(StaticXX, "upload", file.basename),
:alt => file.basename,
:style => "position:fixed;top:#{top};left:#{left};border:thin solid black;padding:15px;background-color:white;width:300px",
:onmousedown => "drag(event)",
:onmouseup => _savepos
img.draggable :id => id,
:src => R(StaticXX, "upload", file.basename),
:alt => file.basename
script :type => "text/javascript" do
"new Draggable('#{id}', { scroll: window });\n" +
"new Effect.Move('#{id}', { x: #{left}, y: #{top}, mode: 'absolute' });"
end
end
end
def _savepos(id = nil)
"new Ajax.Request('http://almaz.spacelabs.nl:3301/savepos/' + " +
"this.id + '/' + this.style.top + '/' + this.style.left); " +
"return false;"
end
end

View File

@ -1,61 +0,0 @@
// Global object to hold drag information.
var dragObj = new Object();
dragObj.zIndex = 0;
function drag(event, id) {
var x, y;
// If an element id was given, find it. Otherwise use the element being
// clicked on.
if (id)
dragObj.elNode = document.getElementById(id);
else {
dragObj.elNode = event.target;
// If this is a text node, use its parent element.
if (dragObj.elNode.nodeType == 3)
dragObj.elNode = dragObj.elNode.parentNode;
}
// Get cursor position with respect to the page.
x = event.clientX + window.scrollX;
y = event.clientY + window.scrollY;
// Save starting positions of cursor and element.
dragObj.cursorStartX = x;
dragObj.cursorStartY = y;
dragObj.elStartLeft = parseInt(dragObj.elNode.style.left, 10);
dragObj.elStartTop = parseInt(dragObj.elNode.style.top, 10);
if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
if (isNaN(dragObj.elStartTop)) dragObj.elStartTop = 0;
// Update element's z-index.
dragObj.elNode.style.zIndex = ++dragObj.zIndex;
// Capture mousemove and mouseup events on the page.
document.addEventListener("mousemove", dragGo, true);
document.addEventListener("mouseup", dragStop, true);
event.preventDefault();
}
function dragGo(event) {
var x, y;
// Get cursor position with respect to the page.
x = event.clientX + window.scrollX;
y = event.clientY + window.scrollY;
// Move drag element by the same amount the cursor has moved.
dragObj.elNode.style.left =
(dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
dragObj.elNode.style.top =
(dragObj.elStartTop + y - dragObj.cursorStartY) + "px";
event.preventDefault();
}
function dragStop(event) {
// Stop capturing mousemove and mouseup events.
document.removeEventListener("mousemove", dragGo, true);
document.removeEventListener("mouseup", dragStop, true);
}

7
public/dragreg.js Normal file
View File

@ -0,0 +1,7 @@
var drgs = new Draggables;
function dragreg(div, event) {
id = div.element.id;
new Ajax.Request('http://localhost:3301/savepos/' + id +
'/' + this.style.top + '/' + this.style.left);
}

11
public/plemp.css Normal file
View File

@ -0,0 +1,11 @@
/* CSS style file for Plemp! */
.draggable {
position: absolute;
padding: 15px;
width: 300px;
top: 0px;
left: 0px;
border: thin solid black;
background: white;
}