{"id":132572,"date":"2024-03-25T23:45:13","date_gmt":"2024-03-25T14:45:13","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/qt%e3%81%a7%e3%83%93%e3%83%87%e3%82%aa%e3%83%97%e3%83%ac%e3%83%bc%e3%83%a4%e3%83%bc%e3%82%92%e4%bd%9c%e6%88%90%e3%81%99%e3%82%8b%ef%bc%88%e3%83%95%e3%83%ab%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc\/"},"modified":"2024-03-28T08:44:46","modified_gmt":"2024-03-27T23:44:46","slug":"qt%e3%81%a7%e3%83%93%e3%83%87%e3%82%aa%e3%83%97%e3%83%ac%e3%83%bc%e3%83%a4%e3%83%bc%e3%82%92%e4%bd%9c%e6%88%90%e3%81%99%e3%82%8b%ef%bc%88%e3%83%95%e3%83%ab%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/qt%e3%81%a7%e3%83%93%e3%83%87%e3%82%aa%e3%83%97%e3%83%ac%e3%83%bc%e3%83%a4%e3%83%bc%e3%82%92%e4%bd%9c%e6%88%90%e3%81%99%e3%82%8b%ef%bc%88%e3%83%95%e3%83%ab%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc\/","title":{"rendered":"Qt\u3067\u30d3\u30c7\u30aa\u30d7\u30ec\u30fc\u30e4\u30fc\u3092\u4f5c\u6210\u3059\u308b\uff08\u30d5\u30eb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u4ed8\u304d\uff09"},"content":{"rendered":"<p>Qt\u3092\u4f7f\u3063\u305f\u30d3\u30c7\u30aa\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u30d5\u30eb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QMediaPlayer&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QMediaPlaylist&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QVideoWidget&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QFileDialog&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QVBoxLayout&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QHBoxLayout&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QPushButton&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QSlider&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QLabel&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QFileIconProvider&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QMessageBox&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QFileInfo&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QDebug&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QApplication&gt;<\/span><\/span>\r\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">VideoPlayer<\/span> : <span class=\"hljs-keyword\">public<\/span> QWidget\r\n{\r\nQ_OBJECT\r\n<span class=\"hljs-keyword\">public<\/span>:\r\n<span class=\"hljs-built_in\">VideoPlayer<\/span>(QWidget *parent = <span class=\"hljs-literal\">nullptr<\/span>)\r\n: <span class=\"hljs-built_in\">QWidget<\/span>(parent)\r\n{\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u5a92\u4f53\u64ad\u653e\u5668\u548c\u89c6\u9891\u5c55\u793a\u7a97\u53e3<\/span>\r\nmediaPlayer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QMediaPlayer<\/span>(<span class=\"hljs-keyword\">this<\/span>);\r\nvideoWidget = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QVideoWidget<\/span>(<span class=\"hljs-keyword\">this<\/span>);\r\nmediaPlayer-&gt;<span class=\"hljs-built_in\">setVideoOutput<\/span>(videoWidget);\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u64ad\u653e\u5217\u8868<\/span>\r\nplaylist = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QMediaPlaylist<\/span>(<span class=\"hljs-keyword\">this<\/span>);\r\nmediaPlayer-&gt;<span class=\"hljs-built_in\">setPlaylist<\/span>(playlist);\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u63a7\u5236\u6309\u94ae<\/span>\r\nplayButton = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QPushButton<\/span>(<span class=\"hljs-keyword\">this<\/span>);\r\nplayButton-&gt;<span class=\"hljs-built_in\">setIcon<\/span>(<span class=\"hljs-built_in\">style<\/span>()-&gt;<span class=\"hljs-built_in\">standardIcon<\/span>(QStyle::SP_MediaPlay));\r\n<span class=\"hljs-built_in\">connect<\/span>(playButton, &amp;QPushButton::clicked, <span class=\"hljs-keyword\">this<\/span>, &amp;VideoPlayer::togglePlayback);\r\nstopButton = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QPushButton<\/span>(<span class=\"hljs-keyword\">this<\/span>);\r\nstopButton-&gt;<span class=\"hljs-built_in\">setIcon<\/span>(<span class=\"hljs-built_in\">style<\/span>()-&gt;<span class=\"hljs-built_in\">standardIcon<\/span>(QStyle::SP_MediaStop));\r\n<span class=\"hljs-built_in\">connect<\/span>(stopButton, &amp;QPushButton::clicked, mediaPlayer, &amp;QMediaPlayer::stop);\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u8fdb\u5ea6\u6761<\/span>\r\npositionSlider = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QSlider<\/span>(Qt::Horizontal, <span class=\"hljs-keyword\">this<\/span>);\r\npositionSlider-&gt;<span class=\"hljs-built_in\">setRange<\/span>(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>);\r\n<span class=\"hljs-built_in\">connect<\/span>(positionSlider, &amp;QSlider::sliderMoved, <span class=\"hljs-keyword\">this<\/span>, &amp;VideoPlayer::setPosition);\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u6807\u7b7e\u663e\u793a\u89c6\u9891\u4fe1\u606f<\/span>\r\ninfoLabel = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">QLabel<\/span>(<span class=\"hljs-keyword\">this<\/span>);\r\ninfoLabel-&gt;<span class=\"hljs-built_in\">setSizePolicy<\/span>(QSizePolicy::Preferred, QSizePolicy::Maximum);\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u5e03\u5c40<\/span>\r\nQVBoxLayout *mainLayout = <span class=\"hljs-keyword\">new<\/span> QVBoxLayout;\r\nQHBoxLayout *controlLayout = <span class=\"hljs-keyword\">new<\/span> QHBoxLayout;\r\ncontrolLayout-&gt;<span class=\"hljs-built_in\">addWidget<\/span>(playButton);\r\ncontrolLayout-&gt;<span class=\"hljs-built_in\">addWidget<\/span>(stopButton);\r\ncontrolLayout-&gt;<span class=\"hljs-built_in\">addWidget<\/span>(positionSlider);\r\nmainLayout-&gt;<span class=\"hljs-built_in\">addWidget<\/span>(videoWidget);\r\nmainLayout-&gt;<span class=\"hljs-built_in\">addWidget<\/span>(infoLabel);\r\nmainLayout-&gt;<span class=\"hljs-built_in\">addLayout<\/span>(controlLayout);\r\n<span class=\"hljs-built_in\">setLayout<\/span>(mainLayout);\r\n}\r\n<span class=\"hljs-keyword\">private<\/span> slots:\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">openFile<\/span><span class=\"hljs-params\">()<\/span>\r\n<\/span>{\r\nQStringList fileNames = QFileDialog::<span class=\"hljs-built_in\">getOpenFileNames<\/span>(<span class=\"hljs-keyword\">this<\/span>, <span class=\"hljs-string\">\"\u9009\u62e9\u89c6\u9891\u6587\u4ef6\"<\/span>, <span class=\"hljs-built_in\">QString<\/span>(), <span class=\"hljs-string\">\"\u89c6\u9891\u6587\u4ef6 (*.mp4 *.avi)\"<\/span>);\r\n<span class=\"hljs-keyword\">if<\/span> (!fileNames.<span class=\"hljs-built_in\">isEmpty<\/span>()) {\r\nforeach(<span class=\"hljs-type\">const<\/span> QString &amp;fileName, fileNames) {\r\n<span class=\"hljs-function\">QFileInfo <span class=\"hljs-title\">fileInfo<\/span><span class=\"hljs-params\">(fileName)<\/span><\/span>;\r\n<span class=\"hljs-keyword\">if<\/span> (fileInfo.<span class=\"hljs-built_in\">exists<\/span>() &amp;&amp; fileInfo.<span class=\"hljs-built_in\">isFile<\/span>()) {\r\nplaylist-&gt;<span class=\"hljs-built_in\">addMedia<\/span>(QUrl::<span class=\"hljs-built_in\">fromLocalFile<\/span>(fileName));\r\n} <span class=\"hljs-keyword\">else<\/span> {\r\nQMessageBox::<span class=\"hljs-built_in\">warning<\/span>(<span class=\"hljs-keyword\">this<\/span>, <span class=\"hljs-string\">\"\u9519\u8bef\"<\/span>, <span class=\"hljs-built_in\">QString<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6: %1\"<\/span>).<span class=\"hljs-built_in\">arg<\/span>(fileName));\r\n}\r\n}\r\nmediaPlayer-&gt;<span class=\"hljs-built_in\">play<\/span>();\r\n}\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">togglePlayback<\/span><span class=\"hljs-params\">()<\/span>\r\n<\/span>{\r\n<span class=\"hljs-keyword\">if<\/span> (mediaPlayer-&gt;<span class=\"hljs-built_in\">state<\/span>() == QMediaPlayer::PlayingState) {\r\nmediaPlayer-&gt;<span class=\"hljs-built_in\">pause<\/span>();\r\n} <span class=\"hljs-keyword\">else<\/span> {\r\nmediaPlayer-&gt;<span class=\"hljs-built_in\">play<\/span>();\r\n}\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">setPosition<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> position)<\/span>\r\n<\/span>{\r\nmediaPlayer-&gt;<span class=\"hljs-built_in\">setPosition<\/span>(position);\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">updatePosition<\/span><span class=\"hljs-params\">(qint64 position)<\/span>\r\n<\/span>{\r\npositionSlider-&gt;<span class=\"hljs-built_in\">setValue<\/span>(position);\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">updateDuration<\/span><span class=\"hljs-params\">(qint64 duration)<\/span>\r\n<\/span>{\r\npositionSlider-&gt;<span class=\"hljs-built_in\">setRange<\/span>(<span class=\"hljs-number\">0<\/span>, duration);\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">handleError<\/span><span class=\"hljs-params\">()<\/span>\r\n<\/span>{\r\nQMessageBox::<span class=\"hljs-built_in\">critical<\/span>(<span class=\"hljs-keyword\">this<\/span>, <span class=\"hljs-string\">\"\u9519\u8bef\"<\/span>, <span class=\"hljs-built_in\">QString<\/span>(<span class=\"hljs-string\">\"\u53d1\u751f\u9519\u8bef: %1\"<\/span>).<span class=\"hljs-built_in\">arg<\/span>(mediaPlayer-&gt;<span class=\"hljs-built_in\">errorString<\/span>()));\r\n}\r\n<span class=\"hljs-keyword\">private<\/span>:\r\nQMediaPlayer *mediaPlayer;\r\nQVideoWidget *videoWidget;\r\nQMediaPlaylist *playlist;\r\nQPushButton *playButton;\r\nQPushButton *stopButton;\r\nQSlider *positionSlider;\r\nQLabel *infoLabel;\r\n};\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> argc, <span class=\"hljs-type\">char<\/span> *argv[])<\/span>\r\n<\/span>{\r\n<span class=\"hljs-function\">QApplication <span class=\"hljs-title\">app<\/span><span class=\"hljs-params\">(argc, argv)<\/span><\/span>;\r\nVideoPlayer player;\r\nplayer.<span class=\"hljs-built_in\">setWindowTitle<\/span>(<span class=\"hljs-string\">\"\u89c6\u9891\u64ad\u653e\u5668\"<\/span>);\r\nplayer.<span class=\"hljs-built_in\">resize<\/span>(<span class=\"hljs-number\">640<\/span>, <span class=\"hljs-number\">480<\/span>);\r\nplayer.<span class=\"hljs-built_in\">show<\/span>();\r\n<span class=\"hljs-keyword\">return<\/span> app.<span class=\"hljs-built_in\">exec<\/span>();\r\n}\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">\"main.moc\"<\/span><\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30d3\u30c7\u30aa\u30d7\u30ec\u30fc\u30e4\u30fc\u306f\u3001Qt\u306eQMediaPlayer\u3001QMediaPlaylist\u3001QVideoWidget\u306a\u3069\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30d3\u30c7\u30aa\u306e\u518d\u751f\u6a5f\u80fd\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002\u753b\u9762\u306b\u306f\u3001\u30d3\u30c7\u30aa\u306e\u8868\u793a\u30a6\u30a3\u30f3\u30c9\u30a6\u3001\u518d\u751f\u30dc\u30bf\u30f3\u3001\u505c\u6b62\u30dc\u30bf\u30f3\u3001\u30d7\u30ed\u30b0\u30ec\u30b9\u30d0\u30fc\u304c\u3042\u308a\u307e\u3059\u3002\u518d\u751f\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30d3\u30c7\u30aa\u306e\u518d\u751f\u3092\u958b\u59cb\u307e\u305f\u306f\u4e00\u6642\u505c\u6b62\u3067\u304d\u3001\u505c\u6b62\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30d3\u30c7\u30aa\u306e\u518d\u751f\u3092\u505c\u6b62\u3067\u304d\u3001\u30d7\u30ed\u30b0\u30ec\u30b9\u30d0\u30fc\u3092\u30c9\u30e9\u30c3\u30b0\u3059\u308b\u3068\u30d3\u30c7\u30aa\u306e\u518d\u751f\u4f4d\u7f6e\u3092\u8abf\u6574\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f7f\u3044\u65b9\uff1a<\/p>\n<ol>\n<li>\u8ffd\u52a0\u3057\u305f\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092Qt\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001main.cpp \u3068\u3057\u3066\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/li>\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3054\u6ce8\u610f\uff1a\u3053\u306e\u30b3\u30fc\u30c9\u306fQt 5 \u306e C++ API \u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b Qt \u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u5408\u308f\u305b\u3066\u9069\u5207\u306b\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qt\u3092\u4f7f\u3063\u305f\u30d3\u30c7\u30aa\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u30d5\u30eb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 #include &lt;QMediaPlayer&gt; #include &lt;QMediaPlaylist&gt; #include &lt;QV [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-132572","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qt\u3067\u30d3\u30c7\u30aa\u30d7\u30ec\u30fc\u30e4\u30fc\u3092\u4f5c\u6210\u3059\u308b\uff08\u30d5\u30eb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u4ed8\u304d\uff09 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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