#include "messageshowarea.h"

MessageShowArea::MessageShowArea() {
    //初始化基本属性
    this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    this->setWidgetResizable(true);

    //设置滚动条样式
    this->verticalScrollBar()->setStyleSheet("QScrollBar:vertical { width: 2px; background-color: rgb(240, 240, 240); }");
    this->horizontalScrollBar()->setStyleSheet("QScrollBar:horizontal { height: 0; }");
    this->setStyleSheet("QScrollArea { border: none; }");

    //创建container这样的widget，作为包含内部元素的容器
    container = new QWidget();
    this->setWidget(container);

    //给container添加界面布局管理器
    QVBoxLayout* layout = new QVBoxLayout();
    layout->setSpacing(0);
    layout->setContentsMargins(0, 0, 0, 0);
    container->setLayout(layout);
}

////////////////////////////////////////////
/// 表示一个消息元素
////////////////////////////////////////////
MessageItem::MessageItem(bool isLeft)
    :isLeft(isLeft)
{

}

MessageItem *MessageItem::makeMessageItem(bool isLeft, const Message &message)
{
    //创建对象和布局管理器
    MessageItem* messageItem = new MessageItem(isLeft);
    QGridLayout* layout = new QGridLayout();
    layout->setSpacing(0);
    layout->setContentsMargins(0, 0, 0, 0);

    //这个message最低不能低于100
    messageItem->setMinimumHeight(100);
    messageItem->setLayout(layout);

    //创建头像
    QPushButton* avatarBtn = new QPushButton();
    avatarBtn->setFixedSize(40, 40);
    avatarBtn->setIconSize(QSize(40, 40));
    avatarBtn->setIcon(message.sender.avatar);
    if(isLeft) {
        layout->addWidget(avatarBtn, 0, 0, 2, 1, Qt::AlignTop | Qt::AlignLeft);
    } else {
        layout->addWidget(avatarBtn, 0, 1, 2, 1, Qt::AlignTop | Qt::AlignRight);
    }

    //创建名字和时间
    QLabel* nameLabel = new QLabel();
    nameLabel->setText(message.sender.nickname + " | " + message.time);
    nameLabel->setAlignment(Qt::AlignBottom);
    nameLabel->setStyleSheet("QLabel { font-size: 12px; color: rgb(178, 178, 178); }");
    if(isLeft) {
        layout->addWidget(nameLabel, 0, 1);
    } else {
        layout->addWidget(nameLabel, 0, 0, Qt::AlignRight);
    }

    //创建消息体


    return messageItem;
}