| 1 |
/* cbe_clip.js $Revision: 0.11 $ |
| 2 |
* CBE v4.19, Cross-Browser DHTML API from Cross-Browser.com |
| 3 |
* Copyright (c) 2002 Michael Foster (mike@cross-browser.com) |
| 4 |
* Distributed under the terms of the GNU LGPL from gnu.org |
| 5 |
*/ |
| 6 |
CrossBrowserElement.prototype.autoClip = function(cp, cmd, increment, endListener, dt, dr, db, dl) { |
| 7 |
if (arguments.length <= 4) { |
| 8 |
if (this.clipping) return; |
| 9 |
else this.clipping = true; |
| 10 |
if (increment) this.clipSpeed = increment; |
| 11 |
else if (!this.clipSpeed) this.clipSpeed = 10; |
| 12 |
var unclip = true, w = this.width(), h = this.height(), xcs = Math.abs(this.clipSpeed), ycs = xcs; |
| 13 |
// Get x and y speeds that are proportional to the element's width and height |
| 14 |
if (h > w) ycs *= (h/w); |
| 15 |
else if(w > h) xcs *= (w/h); |
| 16 |
// Setup clip parameters and initial clip position |
| 17 |
if (cmd.toLowerCase() == 'clip') { xcs *= -1; ycs *= -1; unclip = false; this.clip(0, w, h, 0); } |
| 18 |
if (endListener) this.onclipend = endListener; |
| 19 |
switch(cp.toLowerCase()) { |
| 20 |
case 'n': dt = -ycs; dr = 0; db = 0; dl = 0; if (unclip) {this.clip(h, w, h, 0);} break; |
| 21 |
case 'ne': dt = -ycs; dr = xcs; db = 0; dl = 0; if (unclip) {this.clip(h, 0, h, 0);} break; |
| 22 |
case 'e': dt = 0; dr = xcs; db = 0; dl = 0; if (unclip) {this.clip(0, 0, h, 0);} break; |
| 23 |
case 'se': dt = 0; dr = xcs; db = ycs; dl = 0; if (unclip) {this.clip(0, 0, 0, 0);} break; |
| 24 |
case 's': dt = 0; dr = 0; db = ycs; dl = 0; if (unclip) {this.clip(0, w, 0, 0);} break; |
| 25 |
case 'sw': dt = 0; dr = 0; db = ycs; dl = -xcs; if (unclip) {this.clip(0, w, 0, w);} break; |
| 26 |
case 'w': dt = 0; dr = 0; db = 0; dl = -xcs; if (unclip) {this.clip(0, w, h, w);} break; |
| 27 |
case 'nw': dt = -ycs; dr = 0; db = 0; dl = -xcs; if (unclip) {this.clip(h, w, h, w);} break; |
| 28 |
case 'cen': case 'center': dt = -ycs; dr = xcs; db = ycs; dl = -xcs; if (unclip) {this.clip(h/2, w/2, h/2, w/2);} break; |
| 29 |
} |
| 30 |
} // end if |
| 31 |
if (this.clipBy(dt, dr, db, dl)) { setTimeout("cbeAll["+this.index+"].autoClip("+null+","+null+","+null+","+null+","+dt+","+dr+","+db+","+dl+")", this.timeout); } |
| 32 |
else { |
| 33 |
this.clipping = false; var listener = this.onclipend; |
| 34 |
if (listener) { this.onclipend = null; cbeEval(listener, this); } |
| 35 |
} |
| 36 |
} |
| 37 |
CrossBrowserElement.prototype.scrollBy = function(dx, dy) { |
| 38 |
var ct = this.clipTop(), cr = this.clipRight(), cb = this.clipBottom(), cl = this.clipLeft(), w = this.width(), h = this.height(); |
| 39 |
// Don't scroll beyond the edge of the element |
| 40 |
if (cl + dx < 0) dx = -cl; |
| 41 |
else if (cr + dx > w) dx = w - cr; |
| 42 |
if (ct + dy < 0) dy = -ct; |
| 43 |
else if (cb + dy > h) dy = h - cb; |
| 44 |
// Clip and move to simulate scrolling |
| 45 |
this.clip(ct + dy, cr + dx, cb + dy, cl + dx); |
| 46 |
this.moveBy(-dx, -dy); |
| 47 |
} |
| 48 |
CrossBrowserElement.prototype.clipBy = function(dt, dr, db, dl) { |
| 49 |
var ct = this.clipTop(); |
| 50 |
var cr = this.clipRight(); |
| 51 |
var cb = this.clipBottom(); |
| 52 |
var cl = this.clipLeft(); |
| 53 |
var w = this.width(); |
| 54 |
var h = this.height(); |
| 55 |
// Don't clip beyond the existing width and height of the element and don't let top/bottom and left/right coords cross. |
| 56 |
// Top |
| 57 |
if (ct + dt < 0) { ct = 0; dt = 0; } |
| 58 |
else if (ct + dt > cb) { ct = cb; dt = 0; } |
| 59 |
// Right |
| 60 |
if (cr + dr < cl) { cr = cl; dr = 0; } |
| 61 |
else if (cr + dr > w) { cr = w; dr = 0; } |
| 62 |
// Bottom |
| 63 |
if (cb + db < ct) { cb = ct; db = 0; } |
| 64 |
else if (cb + db > h) { cb = h; db = 0; } |
| 65 |
// Left |
| 66 |
if (cl + dl < 0) { cl = 0; dl = 0; } |
| 67 |
else if (cl + dl > cr) { cl = cr; dl = 0; } |
| 68 |
this.clip(ct + dt, cr + dr, cb + db, cl + dl); |
| 69 |
if (dt || dr || db || dl) return true; |
| 70 |
else return false; |
| 71 |
} |
| 72 |
CrossBrowserElement.prototype.clipArray = function() { |
| 73 |
if (this.ele.style) { var re = /\(|px,?\s?\)?|\s|,|\)/; return this.ele.style.clip.split(re); } |
| 74 |
else return null; |
| 75 |
} |
| 76 |
CrossBrowserElement.prototype.clipTop = function() { |
| 77 |
var v = 0, a = this.clipArray(); |
| 78 |
if (a) v = parseInt(a[1]); |
| 79 |
else if (this.ele.clip) v = this.ele.clip.top; |
| 80 |
return v; |
| 81 |
} |
| 82 |
CrossBrowserElement.prototype.clipRight = function() { |
| 83 |
var v = this.width(), a = this.clipArray(); |
| 84 |
if (a) v = parseInt(a[2]); |
| 85 |
else if (this.ele.clip) v = this.ele.clip.right; |
| 86 |
return v; |
| 87 |
} |
| 88 |
CrossBrowserElement.prototype.clipBottom = function() { |
| 89 |
var v = this.height(), a = this.clipArray(); |
| 90 |
if (a) v = parseInt(a[3]); |
| 91 |
else if (this.ele.clip) v = this.ele.clip.bottom; |
| 92 |
return v; |
| 93 |
} |
| 94 |
CrossBrowserElement.prototype.clipLeft = function() { |
| 95 |
var v = 0, a = this.clipArray(); |
| 96 |
if (a) v = parseInt(a[4]); |
| 97 |
else if (this.ele.clip) v = this.ele.clip.left; |
| 98 |
return v; |
| 99 |
} |
| 100 |
CrossBrowserElement.prototype.clipWidth = function() { |
| 101 |
var v = this.width(), a = this.clipArray(); |
| 102 |
if (a) v = parseInt(a[2]) - parseInt(a[4]); |
| 103 |
else if (this.ele.clip) v = this.ele.clip.width; |
| 104 |
return v; |
| 105 |
} |
| 106 |
CrossBrowserElement.prototype.clipHeight = function() { |
| 107 |
var v = this.height(), a = this.clipArray(); |
| 108 |
if (a) v = parseInt(a[3]) - parseInt(a[1]); |
| 109 |
else if (this.ele.clip) v = this.ele.clip.height; |
| 110 |
return v; |
| 111 |
} |
| 112 |
CrossBrowserElement.prototype.timeout = 35; |
| 113 |
var cbeClipJsLoaded = true; |
| 114 |
// End cbe_clip.js |
Parent Directory
| 
Revision Log
