音量控制滑块优化，音量控制区显示优化

mainwindow.cpp

@@ -338,6 +338,7 @@ void MainWindow::volume_control(int value, int abs)
     // 音量调整到 value 大小(-数减+数加)， abs 为 0 时在当前音量上加减一个值，abs 不为 0 时将当前音量设置为 value 大小
     int len = sprintf(changeSongBuf, "volume %d %d\n", value, abs);
     write(this->fifo_fd, changeSongBuf, len); // 将音量控制指令写入到有名管道中
+    ui->volume_label->setText(QString::number(currentVolume) + " %");
 }
 
 void MainWindow::volume_mute_switch(int mute_arg)
@@ -365,11 +366,24 @@ void MainWindow::on_mute_btn_clicked()
         //        volume_mute_switch(1);
         //        mute_flag = 1;
         volume_mute_switch(++mute_flag);
+        ui->volume_down_btn->setDisabled(true);
+        ui->volume_up_btn->setDisabled(true);
+        ui->volume_slider->setDisabled(true);
+        ui->volume_slider->setStyleSheet("QSlider::groove:horizontal { background-color: white; }"
+                                         "QSlider::handle:horizontal { background-color: gray; width: 20px;}");
+        ui->volume_label->setText("Muted");
     }
     else if (mute_flag == 1) // 已静音则按下后取消静音
     {
         ui->mute_btn->setIcon(QIcon(":/icon2/sound-off"));
         volume_mute_switch(--mute_flag);
+        ui->volume_down_btn->setDisabled(false);
+        ui->volume_up_btn->setDisabled(false);
+        ui->volume_slider->setDisabled(false);
+        ui->volume_slider->setStyleSheet("QSlider::groove:horizontal { background-color: gray; }"
+                                         "QSlider::handle:horizontal { background-color: yellow; width: 20px;}");
+        ui->volume_label->setText(QString::number(currentVolume) + " %");
+
     }
 }
 
@@ -393,3 +407,9 @@ void MainWindow::on_volume_up_btn_clicked()
         setVolumeSlider(currentVolume); // 设置音量滑块位置
     }
 }
+
+void MainWindow::on_volume_slider_sliderMoved(int position)
+{
+    currentVolume = position;
+    volume_control(position, 1);
+}

mainwindow.h

@@ -77,6 +77,8 @@ private slots:
 
     void on_volume_up_btn_clicked();
 
+    void on_volume_slider_sliderMoved(int position);
+
 private:
     Ui::MainWindow *ui;
 };

mainwindow.ui

@@ -243,6 +243,9 @@ color: rgb(255, 255, 0);</string>
      </rect>
     </property>
     <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QWidget" name="widget" native="true">
+       <layout class="QHBoxLayout" name="horizontalLayout_4">
         <item>
          <widget class="QSlider" name="volume_slider">
           <property name="orientation">
@@ -250,6 +253,19 @@ color: rgb(255, 255, 0);</string>
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QLabel" name="volume_label">
+          <property name="styleSheet">
+           <string notr="true">color: rgb(255, 255, 0);</string>
+          </property>
+          <property name="text">
+           <string>------</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </widget>
+     </item>
      <item>
       <widget class="QWidget" name="widget_3" native="true">
        <layout class="QHBoxLayout" name="horizontalLayout_2">