feat: switch playback mode, and add a default album cover

icons/media-album-cover.svg

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="512"
+   height="512"
+   viewBox="0 0 135.46667 135.46667"
+   version="1.1"
+   id="svg8"
+   sodipodi:docname="新建文档 1.2020_04_10_18_17_14.0.svg"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14">
+  <defs
+     id="defs2">
+    <linearGradient
+       inkscape:collect="always"
+       id="linearGradient4537">
+      <stop
+         style="stop-color:#000000;stop-opacity:1;"
+         offset="0"
+         id="stop4533" />
+      <stop
+         style="stop-color:#000000;stop-opacity:0;"
+         offset="1"
+         id="stop4535" />
+    </linearGradient>
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4537"
+       id="linearGradient4539"
+       x1="0.40317535"
+       y1="229.43675"
+       x2="135.1013"
+       y2="229.43675"
+       gradientUnits="userSpaceOnUse" />
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.98994949"
+     inkscape:cx="275.73058"
+     inkscape:cy="224.36371"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     inkscape:pagecheckerboard="true"
+     inkscape:window-width="1920"
+     inkscape:window-height="1009"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid23" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-161.53332)">
+    <ellipse
+       id="path21"
+       cx="67.73333"
+       cy="229.26665"
+       style="fill:none;stroke:#dcdcdc;stroke-width:10.78703594;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.627451;image-rendering:auto"
+       rx="62.339813"
+       ry="62.339817" />
+    <path
+       sodipodi:type="star"
+       style="fill:none;stroke:#dcdcdc;stroke-width:10.58333302;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.627451"
+       id="path822"
+       sodipodi:sides="3"
+       sodipodi:cx="13.418155"
+       sodipodi:cy="232.93301"
+       sodipodi:r1="35.114174"
+       sodipodi:r2="17.557087"
+       sodipodi:arg1="0.93052449"
+       sodipodi:arg2="1.977722"
+       inkscape:flatsided="true"
+       inkscape:rounded="0"
+       inkscape:randomized="0"
+       d="M 34.395835,261.09224 -21.457293,237.0206 27.315922,200.6862 Z"
+       inkscape:transform-center-x="-13.511421"
+       inkscape:transform-center-y="5.3318399"
+       transform="matrix(0.42950169,0.83812005,-0.98835371,0.36421574,287.49969,132.9204)" />
+  </g>
+</svg>

mainwindow.cpp

@@ -172,8 +172,11 @@ void MainWindow::loadFile()
  */
 QMediaPlaylist *MainWindow::createPlaylist(QList<QUrl> urlList)
 {
+    if (m_mediaPlayer->playlist()) {
+        m_mediaPlayer->playlist()->disconnect();
+    }
+
     QMediaPlaylist * playlist = new QMediaPlaylist(m_mediaPlayer);
-    playlist->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop);
 
     for (const QUrl & url : urlList) {
         bool succ = playlist->addMedia(QMediaContent(url));
@@ -182,6 +185,26 @@ QMediaPlaylist *MainWindow::createPlaylist(QList<QUrl> urlList)
         }
     }
 
+    connect(playlist, &QMediaPlaylist::playbackModeChanged, this, [=](QMediaPlaylist::PlaybackMode mode) {
+        switch (mode) {
+        case QMediaPlaylist::CurrentItemInLoop:
+            ui->playbackModeBtn->setIcon(QIcon(":/icons/icons/media-playlist-repeat-song.png"));
+            break;
+        case QMediaPlaylist::Loop:
+            ui->playbackModeBtn->setIcon(QIcon(":/icons/icons/media-playlist-repeat.png"));
+            break;
+        case QMediaPlaylist::Sequential:
+            ui->playbackModeBtn->setIcon(QIcon(":/icons/icons/media-playlist-normal.png"));
+            break;
+        case QMediaPlaylist::Random:
+            ui->playbackModeBtn->setIcon(QIcon(":/icons/icons/media-playlist-shuffle.png"));
+            break;
+        default:
+            break;
+        }
+    });
+
+    playlist->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop);
     m_mediaPlayer->setPlaylist(playlist);
     m_playlistModel->setPlaylist(playlist);
 
@@ -379,6 +402,29 @@ void MainWindow::initConnections()
         default:
             break;
         }
-        qDebug(m_mediaPlayer->errorString().toUtf8() + "aaaaaaaaaaaaa");
+        qDebug("%s aaaaaaaaaaaaa", m_mediaPlayer->errorString().toUtf8().data());
     });
 }
+
+void MainWindow::on_playbackModeBtn_clicked()
+{
+    QMediaPlaylist * playlist = m_mediaPlayer->playlist();
+    if (!playlist) return;
+
+    switch (playlist->playbackMode()) {
+    case QMediaPlaylist::CurrentItemInLoop:
+        playlist->setPlaybackMode(QMediaPlaylist::Loop);
+        break;
+    case QMediaPlaylist::Loop:
+        playlist->setPlaybackMode(QMediaPlaylist::Sequential);
+        break;
+    case QMediaPlaylist::Sequential:
+        playlist->setPlaybackMode(QMediaPlaylist::Random);
+        break;
+    case QMediaPlaylist::Random:
+        playlist->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop);
+        break;
+    default:
+        break;
+    }
+}

mainwindow.h

@@ -36,6 +36,9 @@ protected:
     void centerWindow();
     QMediaPlaylist *createPlaylist(QList<QUrl> urlList);
 
+private slots:
+    void on_playbackModeBtn_clicked();
+
 private slots:
     void on_closeWindowBtn_clicked();
     void on_playBtn_clicked();

mainwindow.ui

@@ -186,7 +186,10 @@ QLabel#coverLabel {
           </size>
          </property>
          <property name="text">
-          <string>AlbumCover</string>
+          <string/>
+         </property>
+         <property name="pixmap">
+          <pixmap resource="resources.qrc">:/icons/icons/media-album-cover.svg</pixmap>
          </property>
          <property name="scaledContents">
           <bool>true</bool>
@@ -505,7 +508,7 @@ QLabel#coverLabel {
                </property>
                <property name="icon">
                 <iconset resource="resources.qrc">
-                 <normaloff>:/icons/icons/media-playlist-repeat.png</normaloff>:/icons/icons/media-playlist-repeat.png</iconset>
+                 <normaloff>:/icons/icons/media-playlist-repeat-song.png</normaloff>:/icons/icons/media-playlist-repeat-song.png</iconset>
                </property>
                <property name="iconSize">
                 <size>

resources.qrc

@@ -12,5 +12,9 @@
         <file>icons/media-playback-pause.png</file>
         <file>icons/audio-volume-muted.png</file>
         <file>icons/app-icon.svg</file>
+        <file>icons/media-playlist-shuffle.png</file>
+        <file>icons/media-playlist-repeat-song.png</file>
+        <file>icons/media-playlist-normal.png</file>
+        <file>icons/media-album-cover.svg</file>
     </qresource>
 </RCC>