Question

我按照这些来创建可检查的组合框

http://programmingexamples.net/wiki/Qt/ModelView/ComboBoxOfCheckBoxes

然而，当我执行此操作 - ＆gt; Model-＆gt; clear（）然后添加项目时，组合框文本（用户单击任何内容之前显示的文本组合框）变为空白。单击组合框时，项目仍将显示并可检查。我怀疑clear（）删除标题并导致这个，但我尝试setHorizontalHeaderLabels等但我仍然无法设置组合框文本。我错过了什么？

Answer 1

添加项目后，尝试设置ComboBox的选定索引。像：

public class StraggredView extends RecyclerView.Adapter<StraggredView.ViewHolder> {

    private List<Content> mDataSet;
    private Context ctx;

    public StraggredView(Context context, List<Content> arrList) {
        ctx = context;
        mDataSet = arrList;

    }

    @Override
    public StraggredView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_grid, parent, false);
        return new ViewHolder(view);

    }

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {


        if(getItemCount()==position)
        {
            //// I AM NOT GETTING IT AT THE BOTTOM... IT INVOKED AS THE ADAPTER IS CALLED FIRST TIME...LOOK AT IT
        }

        if (mDataSet.get(position).getContentImage() == null || mDataSet.get(position).getContentImage().isEmpty()) {

            Glide.with(ctx).load(R.drawable.no_content)
                    // .override(screenWidth / 2, Utils.dpToPx(height))
                    .into(holder.imgContent);
        } else {
            Glide.with(ctx).load(mDataSet.get(position).getContentImage())
                    //  .override(screenWidth / 2, Utils.dpToPx(height))
                    //    .centerCrop()
                    //.transform(new CircleTransform())
                    .into(holder.imgContent);
        }

        holder.imgContent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mDataSet.get(position).getContentImage() != null
                        || !mDataSet.get(position).getContentImage().isEmpty()) {
                    FragmentActivity activity = (FragmentActivity) (ctx);
                    FragmentManager fm = activity.getSupportFragmentManager();
                    FullScreenFragment dialog = FullScreenFragment.newInstance(
                            mDataSet.get(position).getContentImage());
                    dialog.show(fm, "dialog");
                }
            }
        });

    }

    @Override
    public int getItemCount() {
        return this.mDataSet.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public ImageView imgContent;

        public ViewHolder(View itemView) {
            super(itemView);

            imgContent = (ImageView) itemView.findViewById(R.id.imgContent);

        }


    }

}

因为清除ComboBox后可能会出现这样的情况，即使添加项目，它的显示索引也可能会变为-1并保持不变。

如何在Qt中设置ComboBox（可检查）的显示文本

1 个答案: