customlistview.as

flashget43的源代码 一个比较常用的下载程序

_global.CustomListView.prototype.setPropHeight = function(inHeight) {
	return this.setSize(inHeight, this.listHeight);
};

_global.CustomListView.prototype._addItemAt = function(inIdx, inItem) {
	var itemBounds = this.getItemBounds(inItem);
	var itemY = this.totalHeight;
	if (inIdx < this.itemWrapperList.length) {
		itemY = this.itemWrapperList[inIdx].y;
		for (var i = inIdx; i < this.itemWrapperList.length; i ++) {
			this.itemWrapperList[i].y += itemBounds.height;
		}
	}
	var itemWrapper = new CItemWrapper(inItem, itemY, itemBounds);
	this.totalHeight += itemBounds.height;
	if (this.maxWidth < itemBounds.width) {
		this.maxWidth = itemBounds.width;
	}
	if (this.maxHeight < itemBounds.height) {
		this.maxHeight = itemBounds.height;
	}
	this.itemWrapperList.splice(inIdx, 0, itemWrapper);
};

_global.CustomListView.prototype._addItemsAt = function(inIdx, inItemList) {
	var startItemY = this.totalHeight;
	if (inIdx < this.itemWrapperList.length) {
		startItemY = this.itemWrapperList[inIdx].y;
	}

	var itemsHeight = 0;
	for (var i = 0; i < inItemList.length; i ++) {
		var itemBounds = this.getItemBounds(inItemList[i]);
		var itemWrapper = new CItemWrapper(inItemList[i], startItemY + itemsHeight, itemBounds);
		itemsHeight += itemBounds.height;
		this.itemWrapperList.splice(inIdx + i, 0, itemWrapper);
		if (this.maxWidth < itemBounds.width) {
			this.maxWidth = itemBounds.width;
		}
		if (this.maxHeight < itemBounds.height) {
			this.maxHeight = itemBounds.height;
		}
	}
	for (var i = inIdx + inItemList.length; i < this.itemWrapperList.length; i ++) {
		this.itemWrapperList[i].y += itemsHeight;
	}
	this.totalHeight += itemsHeight;
};

_global.CustomListView.prototype._removeItemsAt = function(inStartIdx, inEndIdx) {
	var itemsHeight = 0;
	for (var i = inStartIdx; i <= inEndIdx; i ++) {
		var itemWrapper = this.itemWrapperList[i];
		itemsHeight += itemWrapper.bounds.height;
	}
	
	this.totalHeight -= itemsHeight;
	if (this.totalHeight - this.y < this.listHeight) {
		this.y = Math.max(this.totalHeight - this.listHeight, 0);
	}
	
	for (var i = inEndIdx + 1; i < this.itemWrapperList.length; i ++) {
		this.itemWrapperList[i].y -= itemsHeight;
	}
	
	this.itemWrapperList.splice(inStartIdx, inEndIdx - inStartIdx + 1);
	
	this.maxHeight = 0;
	this.maxWidth = 0;
	for (var i = 0; i < this.itemWrapperList.length; i ++) {
		if (this.maxWidth < this.itemWrapperList[i].bounds.width) {
			this.maxWidth = this.itemWrapperList[i].bounds.width;
		}
		if (this.maxHeight < this.itemWrapperList[i].bounds.height) {
			this.maxHeight = this.itemWrapperList[i].bounds.height;
		}
	}	
	if (this.maxWidth - this.x < this.listWidth) {
		this.x = Math.max(this.maxWidth - this.listWidth, 0);
	}
};

_global.CustomListView.prototype.paint = function() {
	if (this.itemWrapperList.length == 0 || !this.allow_paint) return;
	
	//trace(' <<< Call PAINT >>> ' + this.itemWrapperList.length);	
	
	for (var i = 0; i < this.mcList.length; i ++) this.mcList[i].remove = true;

	if (this.itemWrapperList.length > 0) {
		this.freeDepthLevel = this.mcList.length;
		this.firstShownIdx = this.findItemWrappeIdxForY(this.y);
		itemWrapperIdx = this.firstShownIdx;
		while (itemWrapperIdx < this.itemWrapperList.length) {
			var itemWrapper = this.itemWrapperList[itemWrapperIdx];
			if (itemWrapper.y > this.y + this.listHeight) {
				break;
			}
			var existingMCWrapper = this.mcHash[itemWrapper.hash];
			var itemMC = null;
			if (existingMCWrapper != null) {
				existingMCWrapper.remove = false;
				itemMC = existingMCWrapper.mc;
			} else {
				this.customListView_items.attachMovie(itemWrapper.item.getMC(), 'customListView_' + itemWrapper.hash, this.getFreeDepthLevel());
				itemMC = this.customListView_items['customListView_' + itemWrapper.hash];
				var mcWrapper = new CMCWrapper(itemMC, itemWrapper);
				this.mcList.push(mcWrapper);
				this.mcHash[itemWrapper.hash] = mcWrapper;
				itemWrapper.mcWrapper = mcWrapper;
				itemMC.applyStyle(this.style);
				itemMC.setLanguage(this.language);
				itemMC.setData(itemWrapper.item);
			}
			
			if ((itemWrapper.item.setWidth == null) || (itemWrapper.item.getWidth == null) || (itemWrapper.item.getHeight == null)) {
				//if item itself does not support width/height calculation, set mc width.
				var prefferableWidth = this.listWidth - (this.vScrollBar._visible ? this.vScrollBar._width : 0);
				var maxWidth = this.hScrollBar.maxPos + this.hScrollBar.pageSize;
				itemMC.setWidth(prefferableWidth, this.hScrollBar._visible ? maxWidth : prefferableWidth);
			}
			
			itemMC._x = - this.x - itemWrapper.bounds.x;
			itemMC._y = itemWrapper.y - this.y - itemWrapper.bounds.y;
			
			itemWrapperIdx ++;
		}
	}

	for (var i = 0; i < this.mcList.length; i ++) {
		if (this.mcList[i].remove) {
			this.mcList[i].mc.removeMovieClip();
			this.mcHash[this.mcList[i].itemWrapper.hash] = null;
			for (var j = i + 1; j < this.mcList.length; j ++) {
				this.mcList[j].mc.swapDepths(this.mcList[j].mc.getDepth() - 1);
			}
			this.mcList.splice(i, 1);
			i --;
		}
	}
	
	this.resetItems();//realign module
	
};

_global.CustomListView.prototype.paintHorizontal = function() {
	for (var i = 0; i < this.mcList.length; i ++) {
		var itemMC = this.mcList[i].mc;
		itemMC._x = - this.x - this.itemWrapperList[this.firstShownIdx + i].bounds.x;
	}
};

_global.CustomListView.prototype.findItemWrappeIdxForY = function(inY) {
	var startIdx = Math.floor(inY / this.maxHeight);
	for (var i = startIdx; i < this.itemWrapperList.length; i ++) {
		var itemWrapper = this.itemWrapperList[i];
		if ((itemWrapper.y <= inY) && (itemWrapper.y + itemWrapper.bounds.height > inY)) {
			return i;
		}
	}
	return -1;
};

_global.CustomListView.prototype.getItemBounds = function(inItem) {
	var itemBounds = new Object();
	var prefferableWidth = this.listWidth - (this.vScrollBar._visible ? this.vScrollBar._width : 0);
	var maxWidth = this.hScrollBar.maxPos + this.hScrollBar.pageSize;
	var itemRef = this.getItemRef(inItem);
	
	if ((inItem.setWidth != null) && (inItem.getWidth != null) && (inItem.getHeight != null)) {
		//if item iself supports width/height calculation, do not create mc for this item
		inItem.setWidth(prefferableWidth, this.hScrollBar._visible ? maxWidth : prefferableWidth);
		
		var bounds = inItem.getBounds();
		itemBounds.x = bounds.xMin;
		itemBounds.y = bounds.yMin;
		
		itemBounds.width = inItem.getWidth();
		itemBounds.height = Math.floor(inItem.getHeight());
	}else if(itemRef != undefined) {
		itemRef.setWidth(prefferableWidth, this.hScrollBar._visible ? maxWidth : prefferableWidth);
		itemRef.setData(inItem);
		
		var bounds = itemRef.getBounds();
		if(inItem.getMC() == 'ItemUser') bounds = itemRef.button.getBounds();
		itemBounds.x = bounds.xMin;
		itemBounds.y = bounds.yMin;
		
		itemBounds.width = itemRef._width;
		itemBounds.height = Math.floor(itemRef.button._height);
	}else {
		//otherwise, create a corresponding mc to find item dimensions.
		var testDepthItem = this.customListView_testMC[inItem.getMC() + '_mc'];
		if (testDepthItem == null) {
			this.customListView_testMC.attachMovie(inItem.getMC(), inItem.getMC() + '_mc', this.testMCDepth);
			testDepthItem = this.customListView_testMC[inItem.getMC() + '_mc'];
			this.testMCDepth ++;
			testDepthItem._visible = false;
		}
		testDepthItem.setWidth(prefferableWidth, this.hScrollBar._visible ? maxWidth : prefferableWidth);
		testDepthItem.setData(inItem);

		var bounds = itemRef.getBounds();
		if(inItem.getMC() == 'ItemUser') bounds = itemRef.button.getBounds();
		itemBounds.x = bounds.xMin;
		itemBounds.y = bounds.yMin;
		itemBounds.width = testDepthItem._width;
		itemBounds.height = Math.floor(testDepthItem.button._height);
	}

	return itemBounds;
};

_global.CustomListView.prototype.getFreeDepthLevel = function() {
	return (this.freeDepthLevel ++);
};

_global.CustomListView.prototype.updateScrollBars = function() {
	this.updateVScrollBar();
	this.updateHScrollBar();
	if (this.vScrollBar._visible && this.hScrollBar._visible) {
		this.scrollBarRect._visible = true;
	} else {
		this.scrollBarRect._visible = false;
	}
};

_global.CustomListView.prototype.updateVScrollBar = function() {
	var changedVisibility = false;
	if (this.totalHeight - this.listHeight + (this.hScrollBar._visible ? this.hScrollBar._height : 0) <= 0) {
		if (this.vScrollBar._visible) {
			this.vScrollBar.setEnabled(false);
			this.vScrollBar._visible = false;
			changedVisibility = true;
		}
	} else {
		this.vScrollBar.setChangeHandler(null);
		if (!this.vScrollBar._visible) {
			this.vScrollBar.setEnabled(true);
			this.vScrollBar._visible = true;
			changedVisibility = true;
		}
		var size = this.listHeight - (this.hScrollBar._visible ? this.hScrollBar._height : 0);
		if (this.vScrollBar._height != size)  {
			this.vScrollBar.setSize(size);
		}
		this.vScrollBar.setScrollProperties(size, 0, this.totalHeight - size);
		if (this.y != this.vScrollBar.getScrollPosition()) {
			this.vScrollBar.setScrollPosition(this.y);
		}
		this.vScrollBar.setChangeHandler('vScrollHandler');
	}
	if (changedVisibility) {
		this.resetItems();
		this.updateVScrollBar();
		this.updateHScrollBar();
	}
};

_global.CustomListView.prototype.updateHScrollBar = function() {
	var changedVisibility = false;
	if (this.maxWidth <= this.listWidth - (this.vScrollBar._visible ? this.vScrollBar._width : 0)) {
		if (this.hScrollBar._visible) {
			this.hScrollBar.setEnabled(false);
			this.hScrollBar._visible = false;
			changedVisibility = true;
		}
	} else {
		this.hScrollBar.setChangeHandler(null);
		if (!this.hScrollBar._visible) {
			this.hScrollBar.setEnabled(true);
			this.hScrollBar._visible = true;
			changedVisibility = true;
		}
		var size = this.listWidth - (this.vScrollBar._visible ? this.vScrollBar._width : 0);
		if (this.hScrollBar._width != size) {
			this.hScrollBar.setSize(size);
		}
		this.hScrollBar.setScrollProperties(size, 0, this.maxWidth - size);
		if (this.x != this.hScrollBar.getScrollPosition()) {
			this.hScrollBar.setScrollPosition(this.x);
		}
		this.hScrollBar.setChangeHandler('hScrollHandler');
	}
	if (changedVisibility) {
		this.updateVScrollBar();
	}
};

_global.CustomListView.prototype.vScrollHandler = function() {
	this.y = this.vScrollBar.getScrollPosition();
	this.paint();
};

_global.CustomListView.prototype.hScrollHandler = function() {
	this.x = this.hScrollBar.getScrollPosition();
	this.paintHorizontal();
};

_global.CustomListView.prototype.drawListBorder = function() {
	this.customListView_border.clear();
	this.customListView_border.lineStyle(1, this.style.borderColor, 100);
	this.customListView_border.moveTo(0, 0);
	this.customListView_border.lineTo(this.listWidth, 0);
	this.customListView_border.lineTo(this.listWidth, this.listHeight);
	this.customListView_border.lineTo(0, this.listHeight);
	this.customListView_border.lineTo(0, 0);
};

_global.CustomListView.prototype.resetItems = function() {	
	//recalculate total items height.
	this.maxHeight = 0;
	this.maxWidth = 0;
	this.totalHeight = 0;
	this.x = 0;
	var itemY = 0;
	
	for (var i = 0; i < this.itemWrapperList.length; i ++) {
		var itemBounds = this.getItemBounds(this.itemWrapperList[i].item);
		this.itemWrapperList[i].y = itemY;
		this.itemWrapperList[i].bounds = itemBounds;
		itemY += itemBounds.height;
		this.totalHeight += itemBounds.height;
		if (this.maxWidth < itemBounds.width) {
			this.maxWidth = itemBounds.width;
		}
		if (this.maxHeight < itemBounds.height) {
			this.maxHeight = itemBounds.height;
		}
	}
	
	if (this.totalHeight - this.y < this.listHeight) {
		this.y = Math.max(this.totalHeight - this.listHeight, 0);
	}
	if (this.maxWidth - this.x < this.listWidth) {
		this.x = Math.max(this.maxWidth - this.listWidth, 0);
	}
	
	//allign module	
	if( this['module'] && this['module']._width > 0)
	{	
		var x,y; 
		var w,h;
		w = this.bWidth;
		h = this.bHeight;
		
		if(_level0.ini.module.stretch)
		{			
			this['module']._x = 0;	
			this['module']._y = itemY;
			
			/*
			this['module']._xscale = (this.listWidth/w) * 100;	
			this['module']._yscale = ((this.listHeight - itemY)/h) * 100;
			*/
			
			//_global.FlashChatNS.chatUI.callModuleFunc('mOnModuleWindowResize', {width : this.listWidth, height : (this.listHeight - itemY)});
		}
		else
		{ 
			switch(_level0.ini.module.anchor){
			case '1' :
				x = 0;
				y = itemY;				
				break;
				
			case '2' :
				x = (this.listWidth  - w);
				y = itemY;								
				break;
				
			case '3' :
				x = 0;
				y = Math.max(itemY, itemY + (this.listHeight - itemY - h));
				break;
				
			case '4' :
				x = (this.listWidth - w);
				y = Math.max(itemY, itemY + (this.listHeight - itemY - h));				
				break;
				
			default : 
				x = (this.listWidth  - w) / 2;
				y = Math.max(itemY, itemY + (this.listHeight - itemY - h) / 2);
				break;
			}
		
			this['module']._x = x;	
			this['module']._y = y;
		}		
	
	}
	//---
	
};

_global.CItemWrapper = function(inItem, inY, inBounds) {
	this.item = inItem;
	this.y = inY;
	this.bounds = inBounds;
	this.hash = '' + Math.round(1000000000 * Math.random());
	this.mcWrapper = null;
};

_global.CMCWrapper = function(inMC, inItemWrapper) {
	this.mc = inMC;
	this.itemWrapper = inItemWrapper;
	this.remove = false;
};

Object.registerClass('CustomListView', _global.CustomListView);

#endinitclip