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joko |
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/* cbe_clip.js $Revision: 0.11 $ |
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* CBE v4.19, Cross-Browser DHTML API from Cross-Browser.com |
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* Copyright (c) 2002 Michael Foster (mike@cross-browser.com) |
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* Distributed under the terms of the GNU LGPL from gnu.org |
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*/ |
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CrossBrowserElement.prototype.autoClip = function(cp, cmd, increment, endListener, dt, dr, db, dl) { |
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if (arguments.length <= 4) { |
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if (this.clipping) return; |
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else this.clipping = true; |
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if (increment) this.clipSpeed = increment; |
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else if (!this.clipSpeed) this.clipSpeed = 10; |
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var unclip = true, w = this.width(), h = this.height(), xcs = Math.abs(this.clipSpeed), ycs = xcs; |
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// Get x and y speeds that are proportional to the element's width and height |
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if (h > w) ycs *= (h/w); |
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else if(w > h) xcs *= (w/h); |
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// Setup clip parameters and initial clip position |
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if (cmd.toLowerCase() == 'clip') { xcs *= -1; ycs *= -1; unclip = false; this.clip(0, w, h, 0); } |
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if (endListener) this.onclipend = endListener; |
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switch(cp.toLowerCase()) { |
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case 'n': dt = -ycs; dr = 0; db = 0; dl = 0; if (unclip) {this.clip(h, w, h, 0);} break; |
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case 'ne': dt = -ycs; dr = xcs; db = 0; dl = 0; if (unclip) {this.clip(h, 0, h, 0);} break; |
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case 'e': dt = 0; dr = xcs; db = 0; dl = 0; if (unclip) {this.clip(0, 0, h, 0);} break; |
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case 'se': dt = 0; dr = xcs; db = ycs; dl = 0; if (unclip) {this.clip(0, 0, 0, 0);} break; |
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case 's': dt = 0; dr = 0; db = ycs; dl = 0; if (unclip) {this.clip(0, w, 0, 0);} break; |
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case 'sw': dt = 0; dr = 0; db = ycs; dl = -xcs; if (unclip) {this.clip(0, w, 0, w);} break; |
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case 'w': dt = 0; dr = 0; db = 0; dl = -xcs; if (unclip) {this.clip(0, w, h, w);} break; |
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case 'nw': dt = -ycs; dr = 0; db = 0; dl = -xcs; if (unclip) {this.clip(h, w, h, w);} break; |
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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; |
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} |
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} // end if |
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if (this.clipBy(dt, dr, db, dl)) { setTimeout("cbeAll["+this.index+"].autoClip("+null+","+null+","+null+","+null+","+dt+","+dr+","+db+","+dl+")", this.timeout); } |
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else { |
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this.clipping = false; var listener = this.onclipend; |
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if (listener) { this.onclipend = null; cbeEval(listener, this); } |
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} |
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} |
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CrossBrowserElement.prototype.scrollBy = function(dx, dy) { |
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var ct = this.clipTop(), cr = this.clipRight(), cb = this.clipBottom(), cl = this.clipLeft(), w = this.width(), h = this.height(); |
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// Don't scroll beyond the edge of the element |
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if (cl + dx < 0) dx = -cl; |
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else if (cr + dx > w) dx = w - cr; |
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if (ct + dy < 0) dy = -ct; |
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else if (cb + dy > h) dy = h - cb; |
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// Clip and move to simulate scrolling |
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this.clip(ct + dy, cr + dx, cb + dy, cl + dx); |
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this.moveBy(-dx, -dy); |
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} |
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CrossBrowserElement.prototype.clipBy = function(dt, dr, db, dl) { |
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var ct = this.clipTop(); |
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var cr = this.clipRight(); |
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var cb = this.clipBottom(); |
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var cl = this.clipLeft(); |
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var w = this.width(); |
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var h = this.height(); |
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// Don't clip beyond the existing width and height of the element and don't let top/bottom and left/right coords cross. |
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// Top |
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if (ct + dt < 0) { ct = 0; dt = 0; } |
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else if (ct + dt > cb) { ct = cb; dt = 0; } |
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// Right |
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if (cr + dr < cl) { cr = cl; dr = 0; } |
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else if (cr + dr > w) { cr = w; dr = 0; } |
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// Bottom |
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if (cb + db < ct) { cb = ct; db = 0; } |
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else if (cb + db > h) { cb = h; db = 0; } |
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// Left |
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if (cl + dl < 0) { cl = 0; dl = 0; } |
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else if (cl + dl > cr) { cl = cr; dl = 0; } |
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this.clip(ct + dt, cr + dr, cb + db, cl + dl); |
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if (dt || dr || db || dl) return true; |
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else return false; |
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} |
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CrossBrowserElement.prototype.clipArray = function() { |
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if (this.ele.style) { var re = /\(|px,?\s?\)?|\s|,|\)/; return this.ele.style.clip.split(re); } |
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else return null; |
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} |
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CrossBrowserElement.prototype.clipTop = function() { |
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var v = 0, a = this.clipArray(); |
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if (a) v = parseInt(a[1]); |
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else if (this.ele.clip) v = this.ele.clip.top; |
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return v; |
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} |
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CrossBrowserElement.prototype.clipRight = function() { |
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var v = this.width(), a = this.clipArray(); |
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if (a) v = parseInt(a[2]); |
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else if (this.ele.clip) v = this.ele.clip.right; |
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return v; |
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} |
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CrossBrowserElement.prototype.clipBottom = function() { |
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var v = this.height(), a = this.clipArray(); |
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if (a) v = parseInt(a[3]); |
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else if (this.ele.clip) v = this.ele.clip.bottom; |
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return v; |
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} |
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CrossBrowserElement.prototype.clipLeft = function() { |
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var v = 0, a = this.clipArray(); |
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if (a) v = parseInt(a[4]); |
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else if (this.ele.clip) v = this.ele.clip.left; |
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return v; |
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} |
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CrossBrowserElement.prototype.clipWidth = function() { |
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var v = this.width(), a = this.clipArray(); |
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if (a) v = parseInt(a[2]) - parseInt(a[4]); |
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else if (this.ele.clip) v = this.ele.clip.width; |
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return v; |
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} |
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CrossBrowserElement.prototype.clipHeight = function() { |
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var v = this.height(), a = this.clipArray(); |
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if (a) v = parseInt(a[3]) - parseInt(a[1]); |
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else if (this.ele.clip) v = this.ele.clip.height; |
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return v; |
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} |
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CrossBrowserElement.prototype.timeout = 35; |
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var cbeClipJsLoaded = true; |
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// End cbe_clip.js |
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