add choose friend to group chats

choosefrienddialog.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <QDialog>
+#include <QWidget>
+#include <QHBoxLayout>
+#include <QScrollArea>
+#include <QScrollBar>
+#include <QPushButton>
+#include <QPainter>
+#include <QCheckBox>
+#include <QLabel>
+
+#include "debug.h"
+
+class ChooseFriendDialog;
+
+////////////////////////////////////////////////
+/// 选择好友窗口中的一个 元素/好友项
+////////////////////////////////////////////////
+class ChooseFriendItem : public QWidget {
+	Q_OBJECT
+public:
+	ChooseFriendItem(ChooseFriendDialog* owner, const QIcon& avatar, const QString& name, bool checked);
+
+	void paintEvent(QPaintEvent* event) override;
+	void enterEvent(QEnterEvent* event) override;
+	void leaveEvent(QEvent* event) override;
+
+private:
+	bool isHover = false;
+
+	QCheckBox* checkBox;
+	QPushButton* avatarBtn;
+	QLabel* nameLabel;
+	ChooseFriendDialog* owner; //记录了哪个QWidget持有这个Item，此处应该是ChooseFriendDialog
+};
+
+class ChooseFriendDialog  : public QDialog
+{
+	Q_OBJECT
+
+public:
+	ChooseFriendDialog(QWidget *parent);
+
+	void initLeft(QHBoxLayout* layout);
+	void initRight(QHBoxLayout* layout);
+
+	void addFriend(const QIcon& avatar, const QString& name, bool checked);
+	void addSelectedFriend(const QIcon& avatar, const QString& name);
+
+private:
+	QWidget* totalContainer;
+	QWidget* selectedContainer;
+};
+