/**
* @param index 小于0则顺序插入(插入至最末尾);大于等于0则按指定索引值(index)插入
* @param childView
* @return
*/
public boolean addChildView(int index, View childView) {
if (childViews.contains(childView)) {
return false;
}
if (null == childView.getTag()) {
// 结构层操作
// tag为null说明此view在添加至文件夹内之前是处于桌面上的,所以需要将其从根文件夹对象中删除
GlobalDataCacheForMemorySingleton.getInstance
.getRootDirectory()
.getListFiles()
.remove(((DragView) childView).getBookFile());
} else {
((BookFolderLayout) childView.getTag()).removeChildView(childView, true);
}
if (null != childView.getParent()) {
((ViewGroup) childView.getParent()).removeView(childView);
}
if (index < 0) {
childViews.add(childView);
} else {
childViews.add(index, childView);
}
// 生成缩略图控件
BookThumbnailLayout bookThumbnailLayout = new BookThumbnailLayout(getContext());
bookThumbnailLayout.bind((BookShelfBookCell) childView);
childView.setTag(R.id.bookThumbnailView, bookThumbnailLayout);
MyGridLayout.LayoutParams layoutParams = new MyGridLayout.LayoutParams();
layoutParams.width = (int) getResources().getDimension(R.dimen.book_cell_width) / 3;
layoutParams.height = (int) getResources().getDimension(R.dimen.book_image_height) / 3;
layoutParams.topMargin = 4;
layoutParams.leftMargin = 4;
layoutParams.rightMargin = 4;
layoutParams.bottomMargin = 4;
// 顺序插入时,封面只显示前4本书
if (index < 0) {
if (gridLayout.getChildCount() < 4) {
gridLayout.addView(bookThumbnailLayout, layoutParams);
}
}
// 指定插入时,若索引值小于4则需将封面上多余的一张缩略图(即原第4张)删除
else if (index < 4) {
if (gridLayout.getChildCount() == 4) {
gridLayout.removeViewAt(3);
}
gridLayout.addView(bookThumbnailLayout, index, layoutParams);
}
childView.setTag(this);
updateFrontCover(); // 刷新封面
return true;
}
/**
* @param childView 要删除的视图
* @param isDeleteFolder 是否删除只剩一本书的文件夹
*/
public void removeChildView(View childView, boolean isDeleteFolder) {
childView.setTag(null);
if (childViews.contains(childView)) {
childViews.remove(childView);
}
View bookThumbnailView = (View) childView.getTag(R.id.bookThumbnailView);
int bookFaceIndex = gridLayout.indexOfChild(bookThumbnailView);
gridLayout.removeView(bookThumbnailView); // 删除文件夹封面上显示的书籍缩略图
/** 如果删除的是前4本书中的其中一本，且删除后文件夹内至少还有4本书，则需要更新文件夹封面，将第4本书的缩略图进行补位 */
if (bookFaceIndex >= 0 && childViews.size() >= 4) {
View bookFaceImageView = (View) childViews.get(3).getTag(R.id.bookThumbnailView);
if (bookFaceImageView.getParent() != null) {
((ViewGroup) bookFaceImageView.getParent()).removeView(bookFaceImageView);
}
MyGridLayout.LayoutParams layoutParams = new MyGridLayout.LayoutParams();
layoutParams.width = (int) getResources().getDimension(R.dimen.book_cell_width) / 3;
layoutParams.height = (int) getResources().getDimension(R.dimen.book_image_height) / 3;
layoutParams.topMargin = 4;
layoutParams.leftMargin = 4;
layoutParams.rightMargin = 4;
layoutParams.bottomMargin = 4;
gridLayout.addView(bookFaceImageView, 3, layoutParams);
}
if (null != childView.getParent()) {
((ViewGroup) childView.getParent()).removeView(childView);
}
// 结构层操作
bookFile.getListFiles().remove(((DragView) childView).getBookFile());
// 如果不需要自动删除只剩一本书籍的文件夹则在此处直接返回,终止方法体
if (!isDeleteFolder) {
return;
}
updateFrontCover(); // 刷新封面
/** 该文件夹没有书籍时,则删除该文件夹 */
if (0 == childViews.size()) {
ViewGroup viewGroup = (ViewGroup) this.getParent();
BookFile rootBookFile = GlobalDataCacheForMemorySingleton.getInstance.getRootDirectory();
viewGroup.removeView(this);
// 结构层操作
rootBookFile.getListFiles().remove(bookFile);
}
}
