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2026-04-24 12:07:23 +08:00 · 2020-12-26 01:42:23 +08:00
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+/** $Id: domTT_drag.js 2315 2006-06-12 05:45:36Z dallen $ */
+// {{{ license
+
+/*
+ * Copyright 2002-2005 Dan Allen, Mojavelinux.com (dan.allen@mojavelinux.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// }}}
+// {{{ globals (DO NOT EDIT)
+
+var domTT_dragEnabled = true;
+var domTT_currentDragTarget;
+var domTT_dragMouseDown;
+var domTT_dragOffsetLeft;
+var domTT_dragOffsetTop;
+
+// }}}
+// {{{ domTT_dragStart()
+
+function domTT_dragStart(in_this, in_event)
+{
+	if (typeof(in_event) == 'undefined') { in_event = window.event; }
+
+	var eventButton = in_event[domLib_eventButton];
+	if (eventButton != 1 && !domLib_isKHTML)
+	{
+		return;
+	}
+
+	domTT_currentDragTarget = in_this;
+	in_this.style.cursor = 'move';
+
+	// upgrade our z-index
+	in_this.style.zIndex = ++domLib_zIndex;
+
+	var eventPosition = domLib_getEventPosition(in_event);
+
+	var targetPosition = domLib_getOffsets(in_this);
+	domTT_dragOffsetLeft = eventPosition.get('x') - targetPosition.get('left');
+	domTT_dragOffsetTop = eventPosition.get('y') - targetPosition.get('top');
+	domTT_dragMouseDown = true;
+}
+
+// }}}
+// {{{ domTT_dragUpdate()
+
+function domTT_dragUpdate(in_event)
+{
+	if (domTT_dragMouseDown)
+	{
+		if (domLib_isGecko)
+		{
+			window.getSelection().removeAllRanges()
+		}
+
+		if (domTT_useGlobalMousePosition && domTT_mousePosition != null)
+		{
+			var eventPosition = domTT_mousePosition;
+		}
+		else
+		{
+			if (typeof(in_event) == 'undefined') { in_event = window.event; }
+			var eventPosition = domLib_getEventPosition(in_event);
+		}
+
+		domTT_currentDragTarget.style.left = (eventPosition.get('x') - domTT_dragOffsetLeft) + 'px';
+		domTT_currentDragTarget.style.top = (eventPosition.get('y') - domTT_dragOffsetTop) + 'px';
+
+		// update the collision detection
+		domLib_detectCollisions(domTT_currentDragTarget);
+	}
+}
+
+// }}}
+// {{{ domTT_dragStop()
+
+function domTT_dragStop()
+{
+	if (domTT_dragMouseDown) {
+		domTT_dragMouseDown = false; 
+		domTT_currentDragTarget.style.cursor = 'default';
+		domTT_currentDragTarget = null;
+		if (domLib_isGecko)
+		{
+			window.getSelection().removeAllRanges()
+		}
+	}
+}
+
+// }}}