240 lines
6.8 KiB
JavaScript
240 lines
6.8 KiB
JavaScript
/**************************************************
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* dom-drag.js
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* 09.25.2001
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* www.youngpup.net
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**************************************************
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* 10.28.2001 - fixed minor bug where events
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* sometimes fired off the handle, not the root.
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**************************************************
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* IPS CHANGES
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* 06.01.2005 - Added "cursorchange" to change
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* 07.18.2005 - Added cookie to store values
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* 07.18.2005 - Made it impossible to drag < 0 height (keeponscreen)
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* mouse cursor when over drag handle
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* 07.29.2005 - Added "AddEvent" handler to prevent
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* event clashes / overwrites
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**************************************************/
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var Drag = {
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obj : null,
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fx : null,
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fy : null,
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cookiename : null,
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keeponscreen: true,
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init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
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{
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o.onmousedown = Drag.start;
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o.onmouseover = Drag.cursorchange;
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o.hmode = bSwapHorzRef ? false : true ;
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o.vmode = bSwapVertRef ? false : true ;
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o.root = oRoot && oRoot != null ? oRoot : o ;
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if (o.hmode && isNaN(parseInt(o.root.style.left ))) o.root.style.left = "0px";
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if (o.vmode && isNaN(parseInt(o.root.style.top ))) o.root.style.top = "0px";
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if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right = "0px";
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if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";
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o.minX = typeof minX != 'undefined' ? minX : null;
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o.minY = typeof minY != 'undefined' ? minY : null;
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o.maxX = typeof maxX != 'undefined' ? maxX : null;
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o.maxY = typeof maxY != 'undefined' ? maxY : null;
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o.xMapper = fXMapper ? fXMapper : null;
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o.yMapper = fYMapper ? fYMapper : null;
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//----------------------------------
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// Figure width and height
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//----------------------------------
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if ( Drag.keeponscreen )
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{
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Drag.my_width = 0;
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Drag.my_height = 0;
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if ( typeof( window.innerWidth ) == 'number' )
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{
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//----------------------------------
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// Non IE
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//----------------------------------
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Drag.my_width = window.innerWidth;
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Drag.my_height = window.innerHeight;
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}
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else if ( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) )
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{
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//----------------------------------
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// IE 6+
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//----------------------------------
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Drag.my_width = document.documentElement.clientWidth;
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Drag.my_height = document.documentElement.clientHeight;
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}
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else if ( document.body && ( document.body.clientWidth || document.body.clientHeight ) )
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{
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//----------------------------------
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// Old IE
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//----------------------------------
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Drag.my_width = document.body.clientWidth;
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Drag.my_height = document.body.clientHeight;
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}
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}
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o.root.onDragStart = new Function();
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o.root.onDragEnd = new Function();
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o.root.onDrag = new Function();
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},
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cursorchange : function(e)
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{
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var o = Drag.obj = this;
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o.style.cursor = 'move';
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},
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start : function(e)
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{
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var o = Drag.obj = this;
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e = Drag.fixE(e);
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var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
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var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
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o.root.onDragStart(x, y);
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o.lastMouseX = e.clientX;
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o.lastMouseY = e.clientY;
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if (o.hmode) {
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if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
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if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
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} else {
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if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
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if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
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}
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if (o.vmode) {
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if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
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if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
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} else {
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if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
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if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
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}
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//Drag.addEvent( document, 'mousemove', Drag.drag , false );
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//Drag.addEvent( document, 'mouseup' , Drag.end , false );
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document.onmousemove = Drag.drag;
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document.onmouseup = Drag.end;
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return false;
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},
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drag : function(e)
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{
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e = Drag.fixE(e);
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var o = Drag.obj;
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var ey = e.clientY;
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var ex = e.clientX;
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var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
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var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
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var nx, ny;
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if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
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if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
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if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
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if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);
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nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
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ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));
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if (o.xMapper) nx = o.xMapper(y);
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else if (o.yMapper) ny = o.yMapper(x);
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//----------------------------------
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// Keep on screen?
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//----------------------------------
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if ( Drag.keeponscreen )
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{
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ny = ny < 0 ? 0 : ny;
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nx = nx < 0 ? 0 : nx;
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if ( Drag.my_width )
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{
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nx = nx > Drag.my_width - parseInt(o.root.style.width) ? Drag.my_width - parseInt(o.root.style.width) : nx;
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}
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}
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Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
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Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
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Drag.obj.lastMouseX = ex;
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Drag.obj.lastMouseY = ey;
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Drag.obj.root.onDrag(nx, ny);
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return false;
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},
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end : function()
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{
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document.onmousemove = null;
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document.onmouseup = null;
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Drag.obj.root.onDragEnd( parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]),
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parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
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var o = Drag.obj;
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fy = parseInt( o.root.style.top );
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fx = parseInt( o.root.style.left );
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//----------------------------------
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// Store in a cookie?
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//----------------------------------
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if ( Drag.cookiename )
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{
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try
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{
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ipsclass.my_setcookie( Drag.cookiename, fx+','+fy, 1 );
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}
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catch(e)
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{
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}
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}
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Drag.obj = null;
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},
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addEvent: function(elm, evType, fn, useCapture)
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{
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// Cross-browser event handling for IE5+, NS6 and Mozilla
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// By Scott Andrew
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if ( elm.addEventListener )
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{
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elm.addEventListener(evType, fn, useCapture);
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return true;
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}
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else if ( elm.attachEvent )
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{
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var r = elm.attachEvent('on' + evType, fn);
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return r;
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}
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else
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{
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elm['on' + evType] = fn;
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}
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},
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fixE : function(e)
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{
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if (typeof e == 'undefined') e = window.event;
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if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
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if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
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return e;
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}
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}; |