2 * brisk - dom-drag.js
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4 * Copyright (C) 2006 matteo.nastasi@milug.org
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABLILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details. You should have received a
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15 * copy of the GNU General Public License along with this program; if
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16 * not, write to the Free Software Foundation, Inc, 59 Temple Place -
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17 * Suite 330, Boston, MA 02111-1307, USA.
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21 /**************************************************
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25 **************************************************
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26 * 10.28.2001 - fixed minor bug where events
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27 * sometimes fired off the handle, not the root.
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28 **************************************************/
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34 init : function(o, mouseup_cb, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
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36 o.onmousedown = Drag.start;
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37 o.mouseup_cb = mouseup_cb;
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39 /* alert("agnulla"+o.style.left); */
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41 o.hmode = bSwapHorzRef ? false : true ;
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42 o.vmode = bSwapVertRef ? false : true ;
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44 o.root = oRoot && oRoot != null ? oRoot : o ;
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46 if (o.hmode && isNaN(parseInt(o.root.style.left ))) {
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47 o.root.style.left = window.getComputedStyle(o, "").getPropertyValue("left");
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48 if (isNaN(parseInt(o.root.style.left)))
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49 o.root.style.left = "0px";
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51 if (o.vmode && isNaN(parseInt(o.root.style.top ))) {
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52 o.root.style.top = window.getComputedStyle(o, "").getPropertyValue("top");
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53 if (isNaN(parseInt(o.root.style.top)))
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54 o.root.style.top = "0px";
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56 if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right = "0px";
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57 if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";
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59 o.minX = typeof minX != 'undefined' ? minX : null;
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60 o.minY = typeof minY != 'undefined' ? minY : null;
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61 o.maxX = typeof maxX != 'undefined' ? maxX : null;
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62 o.maxY = typeof maxY != 'undefined' ? maxY : null;
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64 o.xMapper = fXMapper ? fXMapper : null;
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65 o.yMapper = fYMapper ? fYMapper : null;
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67 o.root.onDragStart = new Function();
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68 o.root.onDragEnd = new Function();
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69 o.root.onDrag = new Function();
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74 var o = Drag.obj = this;
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77 o.oldzidx = o.style.zIndex;
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78 o.style.zIndex = 10;
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82 var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
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83 var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
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84 o.root.onDragStart(x, y);
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86 o.lastMouseX = e.clientX;
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87 o.lastMouseY = e.clientY;
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90 if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
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91 if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
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93 if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
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94 if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
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98 if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
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99 if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
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101 if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
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102 if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
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105 document.onmousemove = Drag.drag;
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106 document.onmouseup = Drag.end;
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116 var ey = e.clientY;
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117 var ex = e.clientX;
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118 var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
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119 var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
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122 if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
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123 if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
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124 if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
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125 if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);
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127 nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
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128 ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));
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130 if (o.xMapper) nx = o.xMapper(y)
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131 else if (o.yMapper) ny = o.yMapper(x)
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133 Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
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134 Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
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135 Drag.obj.lastMouseX = ex;
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136 Drag.obj.lastMouseY = ey;
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138 Drag.obj.root.onDrag(nx, ny);
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147 o.style.zIndex = o.oldzidx;
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149 if (o.mouseup_cb != null) {
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150 if (o.mouseup_cb(o) == 1) {
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151 o.onmousedown = null;
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155 document.onmousemove = null;
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156 document.onmouseup = null;
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157 Drag.obj.root.onDragEnd( parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]),
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158 parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
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164 if (typeof e == 'undefined') e = window.event;
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165 if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
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166 if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
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