Qicon from theme printer-printing The icon used while a print job is successfully being spooled to a printing device. When you retrieve a pixmap using pixmap( PySide. Mind the note in the fromTheme() docs - by default it works only on X11. This icon should be the theme's printer device icon, with a document emerging from the printing device. jpg image. If no such icon is found in the current theme fallback is returned instead. QIcon icon = QIcon::fromTheme(QStringLiteral("view-refresh")); On Linux is okay but on Windows is nothing. Mar 28, 2025 · Learn how to create and set icons for windows in PyQt6 using QIcon. Aug 25, 2020 · QIcon 类代表图标，实现在 QtGui 共享库中。QIcon 对象可以认为是一系列图像的组合，每个图像代表窗口在某种状态下应该1显示的图标。 构造 QIcon 类支持以下构造函数： QIcon(); // 构造一个空图像构成的图标 QIcon(const QPixmap &pi For sizes up to 16 x 16, QIcon uses qt_extended_16x16. If you want to use icons from another theme with fromTheme() you must specify that theme. svg icons (for When providing an application theme, then you need to follow the Icon Theme Specification to specify which files to use for different resolutions. QIcon corresponding to name in the current icon theme. Jan 8, 2017 · QIcon::fromTheme("gnome-do") will return a QIcon from the current theme. Feb 20, 2020 · I am getting crazy with QIcon::fromTheme() My goal is to get "standard" icons on Linux (with KDE or Gnome) and fallback custom icons for all other platfor Jun 9, 2020 · I want to build a QIcon from theme icons, but how do you convert a QIcon::fromTheme() to pixmap? Everything I try doesn't seem to work. 如果来自 AwOken 的 theme. 。如果检查目标系统中的主题搜索路径并设置主题名称，则更有可能获得成功。 示例 May 15, 2017 · To fetch an icon from the current icon theme: QIcon undoicon = QIcon:: fromTheme("edit-undo"); 注意： By default, only X11 will support themed icons. fromTheme. The last resort fallback theme is always "hicolor". png. 6. If we want to switch to another theme (dark theme), then we can simply use the code mentioned above to switch the look and feel of our Widgets by applying a different stylesheet. QIcon. QIcon QIcon::fromTheme(const QString &name) QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback) 上述两个函数可以从系统主题中获取图标，后者可以在主题中找不到图标时，再使用自己定义的图标，使用方法如下： Mar 30, 2023 · 1、简介 函数原型 QIcon QIcon::fromTheme(const QString &name) QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback) 上述两个函数可以从系统主题中获取图标，后者可以在主题中找不到图标时，再使用自己定义的图标，使用方法如下： QIcon undoic Icon Engines¶. Is this wrong? QPixma The following are 30 code examples of PyQt5. fromTheme to switch icons in the app depending on the theme selected by the user. I found few python code examples. To make QIcon use the high DPI version of an image, add an additional entry to the appropriate index. source can be set to ensure that an icon will always be found. On other platforms it is not set by default. However, this is only really worth doing if you want to have a Linux-native look, for other use cases the QResource system is simpler. The user can then select the icon theme that they want to use, and all applications will use icons from the theme. But if you check your target system for the theme search paths and set the theme name, you are more likely to have May 11, 2020 · Qt themes work on all platforms, it's just that on Linux you get the theme for free. Mar 31, 2017 · After digging for a while here and there, and digging in how QIcon itself uses an svg file to load an icon, here's what I learned: QIcon, when called with an svg file (or any other image type for that matter), it calles addFile() subsequently, which only uses the extension of the file (called QFileInfo::suffix in Qt) to determine the method that converts the image file to an icon. We would like to show you a description here but the site won’t allow us. It’s only really worth doing if you want to have a Linux-native look on Linux desktops. fromTheme时，图标无法显示出来，仅显示一个空白的框。 Returns the QIcon corresponding to name in the current icon theme. Creating the theme file is a bit cumbersome at first, but once you get the gist, it's quite easy, and using fromTheme() is simpler than always using the full path, with the major benefit that once you use this method, icons don't need to be updated again, as setting the icon theme will automatically switch all icons accordingly. Retrieve the icon If the icon exists, use QIcon::fromTheme(iconThemeName) to get the QIcon object representing the themed icon. Basically use any "bluetooth. fromTheme(const QString &name, const QIcon &fallback) to specify a Qt5 built-in icon as fallback which a) obviously is neither possible for all icons a theme may offer and b) does break the look & feel of the active theme. index 归用户所有，但图标归 root 所有，它可以加载一些图标，而对于一些它只加载一个空图标（例如，它没有加载“退出”，但它加载了'gtk-preferences'）。 #内置图标. Themes defined this way can be used across all platforms. like here), and bundle this directory as QRe Nov 18, 2024 · 文章浏览阅读1. For other platforms you would need a custom . May 8, 2024 · 1、简介 函数原型 QIcon QIcon::fromTheme(const QString &name)QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback) 上述两个函数可以从系统主题中获取图标，后者可以在主题中找不到图标时，再使用自己定义的图标，使用方法如下： QIcon undoicon = QIc QIcon::fromTheme() は、Qt GUI アプリケーションでテーマアイコンを簡単に利用するための便利な関数です。この関数は、指定されたテーマアイコン名に基づいて、現在のテーマから対応するアイコンを取得します。 Nov 14, 2022 · Yes, that's it. org created the spec on how icon themes should work in free software desktop environments. QSize, Mode, State), and no pixmap for this given size, mode and state has been added with PySide. png")); May 13, 2011 · The static function QIcon::fromTheme() used above can also be used with custom, locally defined icon themes that are placed into Qt Resource files 14). fromTheme(name[, fallback=QIcon()]) Parameters: name – unicode; fallback – PySide. Internally, QIcon instantiates an icon engine backend to handle and render the icon images. Icons which cannot be found in a given theme need to be looked up in the fallback themes until an icon is found. When you retrieve a pixmap using pixmap( QSize, Mode, State), and no pixmap for this given size, mode and state has been added with addFile() or addPixmap(), then QIcon will generate one on the fly. 当选中QTreeView的一行时，将会自动触发信号clicked(const QModelIndex)，该信号可以可以绑定一个槽函数treeViewClicked(const QModelIndex)，然后可以将要实现的功能在该槽函数中实现。 PyQt是一个功能强大的Python库，用于创建跨平台的图形用户界面。其中，QIcon是一种用于显示图标的类。通过QIcon. QIcon QIcon:: fromTheme ( const QString & name, const QIcon & fallback = QIcon() ) [static] Returns the QIcon corresponding to name in the current icon theme. Apr 22, 2020 · 文章浏览阅读1. In order Nov 18, 2024 · 文章浏览阅读1. The benefits of doings this are limited, though a tutorial on it is planned. addFile() or PySide. theme file: Aug 25, 2020 · 可供参考的思路为（Qt Creator中做法）： 构建自己的Icon类，储存图标文件和颜色（主题）信息，所有地方均使用自定义图标类，通过icon方法转化为QIcon。其中颜色绘制通过读取QImage，动态修改像素值进行构建。参考： 构建出类似于QIcon的较通用性接口较为复杂。 文章浏览阅读3. Jun 16, 2016 · On my computer, Gnome's default theme has 106 folders; the Oxygen theme has 166; Breeze has 56; hicolor has 483. Returns the QIcon corresponding to name in the current icon theme. QIcon will Mar 31, 2021 · Indeed, freedesktop. fromTheme 在 PyQt 中无法显示图标 在本文中，我们将介绍在 PyQt 中使用 QIcon. This helps prevent errors if the icon is not present. Mar 25, 2025 · This icon should be the theme's printer device icon, with the theme's style element for errors, overlayed on top of the icon. fromTheme when loading a . They define an icon theme as the following: An icon theme is a set of icons that share a common look and feel. void QIcon:: paint (QPainter *painter, int x, On X11, the current icon theme depends on your desktop settings. so let’s do it right and use QIcon. For sizes above 32 x 32, it uses qt_extended_48x48. – Jan 5, 2024 · Please provide a valid minimal reproducible example, and ensure that the theme is properly loaded, possibly switching the theme names in the theme files (to see if the selected theme does load the correct files, as it's possible that the fallback mechanism of QIcon just attempts to load the first available icon if the theme is not loaded Theme icons are referenced by a name, and regular icons by a source URL. To fetch an icon from the current icon theme: QIcon undoicon = QIcon:: fromTheme("edit-undo"); 注意： By default, only X11 will support themed icons. fromTheme 方法时无法显示图标的问题，并提供解决方法和示例代码。 阅读更多：PyQt 教程 问题描述 PyQt 是一个强大的开发工具包，用于创建跨平台的桌面应用程序。 本博客主要总结树形控件QTressView的用法，全文主要通过一个实例，来展示树形控件QTressView用法。 注意： a1. The latest version of the freedesktop icon specification can be obtained here: Dec 21, 2015 · QIcon::fromTheme在特定条件下工作。 如果它能在QIcon::themeSearchPaths()中为QIcon::themeName()找到它. Internally, QIcon instantiates an icon engine backend to handle and render the icon images. Additional files or pixmaps will then be handled by the same engine. fromTheme(). Dec 22, 2015 · QIcon::fromTheme works under specific conditions. If it can find it in the QIcon::themeSearchPaths() for the QIcon::themeName() If the desired icon isn't there, Qt Designer won't be able to do any of the from theme, named icons. Qt follows this spec in its implementation, and as mentioned by @eyllanesc QIcon::fromTheme() static method can be used to lookup needed icons. Since 4. It looks as I could do this the "create your own icon" way so I can reuse existing QIcon code. g. we’ll have to simply put the icons into a freedesktop icon theme spec compatible directory (e. It works well with . supportedImageFormats() and QImageWriter. 如果不存在所需的图标，Qt设计器将无法执行任何from主题，命名为图标。 但是. Is there an way to use an icon from theme in HTML code like it can be achieved using the following code: QIcon::fromTheme(QStringLiteral("list-add"), Feb 19, 2024 · 本篇文章介绍了QT中的QIcon类，其定义和常用构造函数、成员函数进行了详细的讲解，并通过实际代码演示了QIcon类在QPushButton控件中的使用方法。 QIcon 是 QT 中用于表示图标或者 图片 的一个 类 ，可以将其用于QAction、 QT oolButton等控件中，来为应用程序增加更多的 Dec 7, 2015 · One is for resource file and directly above it is a text field for a standard icon from theme. 函数原型. index 文件归 root 所有，则找不到任何文件。如果 theme. The fallback mechanism will eventually use the default whenever your theme doesn't provide an icon. 4k次，点赞18次，收藏14次。QIcon 是 Qt 框架中的一个类，它用于加载、管理和显示图标。QIcon 类在 QtGui 共享库中实现，可以认为是一系列图像的组合，每个图像代表窗口在某种状态下应该显示的图标。 Olimi’s Blog | loading 快乐老家 Jul 17, 2013 · I'm currently displaying an icon from the resources using the following HTML code as text: Currently there is no (supported) tag assigned. source will be used instead. May 15, 2011 · When a tool button or menu entry is checked, the QIcon ‘s state is On, otherwise it’s Off. Both icon. Use the QImageReader. QtCore. 8k次，点赞31次，收藏24次。QIcon类是Qt框架中一个强大且灵活的类，用于图标的管理。无论是简易的小型脚本，还是复杂的桌面应用程序，都可以通过QIcon方便地提高用户界面的美观和功能性本文详细介绍了QIcon的创建、使用和一些实用技巧，并通过示例代码展示了如何使用QIcon设置按钮 A QIcon can generate smaller, larger, active, and disabled pixmaps from the set of pixmaps it is given. Feb 20, 2020 · I am getting crazy with QIcon::fromTheme() My goal is to get "standard" icons on Linux (with KDE or Gnome) and fallback custom icons for all other platfor 1、简介. If the icon is found in the theme, it will always be used; even if icon. png" icon currently on my system. png and scales it down if necessary. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Mar 24, 2021 · @sierdzio Thanks. Apr 5, 2024 · I am facing a problem with QIcon. Custom icon theme search paths can be set with QIcon::setThemeSearchPaths(). 7w次，点赞8次，收藏54次。QIcon是Qt中的一个类，用于处理各种状态下的图标。它可以包含一系列图像，根据窗口的不同状态（如正常、禁用、激活、选中等）自动选择合适的图像进行显示。 Dec 27, 2022 · Let's assume we have a set of light theme icons setup for some QPushButtons/QActions in our application. The generated code for this uses QIcon::fromTheme() and thus falls under some restrictions: the available names list is listed here. A QIcon can generate smaller, larger, active, disabled, and selected pixmaps from the set of pixmaps it Use the supportedImageFormats() and supportedImageFormats() functions to retrieve a complete list of the supported file formats. Check for icon existence (optional) Call QIcon::hasThemeIcon(iconThemeName) to verify if the icon is available in the current theme before attempting to retrieve it. Theme icons are referenced by a name, and regular icons by a source URL. May 11, 2020 · Qt themes work on all platforms, it’s just that on Linux you get the theme for “free”. QtGui. fromTheme方法，我们可以根据主题名称获取系统主题中的图标。然而，有时候在使用QIcon. A theme can also specify one or several fallback themes. The latest version of the freedesktop icon specification and naming specification can be obtained here: The QIcon class provides scalable icons in different modes and states. name and icon. May 18, 2021 · I've try to use icon from theme, like this. org has an Icon Theme Specification document that defines the notion of icon theme and defines an algorithm to search for specific icons. For sizes between 17 x 17 and 32 x 32, it uses qt_extended_32x32. supportedImageFormats() functions to retrieve a complete list of the supported file formats. Nov 20, 2023 · 文章浏览阅读669次。本文详细介绍了UOS统信操作系统中Qt应用开发时QIcon的使用，包括内置图标引擎、图标类型（主题类型、功能类型、引用数量划分）、图标命名规则，以及图标使用方法和运行环境的说明。 Aug 31, 2022 · Qt always uses the default system theme, setThemeSearchPaths only sets the search path for the themes, not the icons. Icon engines differ in the way they handle and render icons. Jul 4, 2018 · QIcon 类代表图标，实现在 QtGui 共享库中。QIcon 对象可以认为是一系列图像的组合，每个图像代表窗口在某种状态下应该1显示的图标。 构造 QIcon 类支持以下构造函数： QIcon(); // 构造一个空图像构成的图标 QIcon(const QPixmap &pi Nov 19, 2022 · Looking up every icon file in all search paths would take too long IMHO and I prefer using QIcon. Returns the PySide. On non-Linux platforms you have to define your own icon theme from scratch. QFluentWidgets 中的组件一般支持以下三种图标参数类型： str: 图标路径; QIcon：Qt 图标; FluentIconBase: 流畅图标抽象类; QFluentWidgets 提供的 FluentIcon 继承自 FluentIconBase, 包含数百个矢量图标，可以在 gallery open in new window 示例的图标界面查看和搜索图标。 Mar 10, 2015 · like discussed in #950, #2210 advances the icons. addPixmap(), then PySide. So I want to use QIcon Jul 25, 2012 · static PySide. In order Feb 20, 2020 · I am getting crazy with QIcon::fromTheme() My goal is to get "standard" icons on Linux (with KDE or Gnome) and fallback custom icons for all other platfor Use the supportedImageFormats() and supportedImageFormats() functions to retrieve a complete list of the supported file formats. . Customize your application’s appearance with icons for main windows, dialogs, and toolbars. source is also set. QIcon; Return type: PySide. 4k次。本文详细介绍了Qt中QIcon::fromTheme函数的使用方法，该函数用于从当前系统主题中获取图标。文章提供了函数的参数说明，返回值解释，并引用了自由桌面图标规范，同时给出了在不同平台下使用主题图标的注意事项。 Aug 14, 2023 · QIcon::fromTheme works with icon themes following the freedesktop icon theme specification. Nov 14, 2018 · FreeDesktop. The type of icon engine is determined by the first file or pixmap or theme added to a QIcon object. However, the icons remain the same style. You can, for example, use the QIcon ‘s states to display differing pixmaps depending on whether the tool button or menu entry is checked or not. If the icon is not found in the theme, icon. If you want to provide a guaranteed fallback for platforms that do not support theme icons, you can use the second argument: QIcon undoicon = QIcon::fromTheme("edit-undo", QIcon(":/undo. In KDE, if you change the icon theme, the icons should also update to match the new theme. To fetch an icon from the current icon theme: QIcon PyQt：PyQt QIcon. I use QIcon. QIcon QIcon::fromTheme(const QString &name) QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback) 上述两个函数可以从系统主题中获取图标，后者可以在主题中找不到图标时，再使用自己定义的图标，使用方法如下： Mar 14, 2019 · 1、简介. xnnhluq zsoj rxa chhro daan ncpyo wwlf ntrcl grgewv jqeau kyvyw xhlvh rgwdbtx ygqopod vhjmnev