From 51eed417f5fad2d208ab370a134021481531d790 Mon Sep 17 00:00:00 2001
From: flykhan <liubo666666@outlook.com>
Date: Thu, 31 Aug 2023 14:07:01 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=BF=AB=E9=80=80=E5=BF=AB?=
 =?UTF-8?q?=E8=BF=9B=E6=A7=BD=E5=87=BD=E6=95=B0?=
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---
 mainwindow.cpp | 21 +++++++++++++++++++++
 mainwindow.h   |  1 +
 2 files changed, 22 insertions(+)

diff --git a/mainwindow.cpp b/mainwindow.cpp
index 768d2e2..9db2498 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -260,12 +260,14 @@ void *readPipeMSG(void *arg)
 
 void MainWindow::setSongList()
 {
+    // 将 vector 内容转存入 QStringList
     QStringList strList;
     for(vector<string>::const_iterator it = vectorSong.begin(); it != vectorSong.end(); ++it)
     {
         strList.append(QString::fromStdString(*it));
     }
     ui->song_list_widget->addItems(strList);
+//    ui->song_list_widget->setCurrentRow(2);
 }
 
 void MainWindow::on_play_btn_clicked()
@@ -293,3 +295,22 @@ void MainWindow::on_front_btn_clicked()
 {
     playNextSong(); // 切换下一首歌
 }
+
+
+void MainWindow::player_rewind_or_forward(int seconds)
+{
+    char changeSongBuf[128] = "";
+    int len = sprintf(changeSongBuf, "seek %d\n", seconds); // 快进快退 seconds 秒 (seconds 为正->进，为负->退)
+    write(this->fifo_fd, changeSongBuf, len); // 将获取的下一首歌曲名写入到有名管道中
+}
+
+
+void MainWindow::on_last_btn_clicked()
+{
+    player_rewind_or_forward(-10); // 快退 10 秒
+}
+
+void MainWindow::on_next_btn_clicked()
+{
+    player_rewind_or_forward(10); // 快退 10 秒
+}
diff --git a/mainwindow.h b/mainwindow.h
index 22f976b..40fafc7 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -47,6 +47,7 @@ public:
 public slots:
     void playNextSong(); // 切换歌曲槽函数I
     void playLastSong();
+    void player_rewind_or_forward(int seconds)； // 快进快退函数
     void setCurrentTimeLabel(int time); // 设置当前时间标签槽函数
     void setCurrentSlider(int currentProgress); // 设置当前进度条