As shown in the createImageIcon method, it is advisable to first verify that the URL points to an existing file before passing it to the ImageIcon constructor. If the data location is invalid (but non-null), an ImageIcon is still successfully created it just has no size and, therefore, paints nothing. When you specify a filename or URL to an ImageIcon constructor, processing is blocked until after the image data is completely loaded or the data location has proven to be invalid. ImageIcon icon = new ImageIcon('images/middle.gif', When the image is not part of the application, getResource should not be used and the ImageIcon constructor is used directly. This allows the application to verify that the image is available and to provide sensible error handling if it is not.

You should use the Class getResource method to obtain the path to the image. Generally, applications provide their own set of images used as part of the application, as is the case with the images used by many of our demos. The description argument is a string that allows assistive technologies to help a visually impaired user understand what information the icon conveys. In the preceding snippet, the first argument to the ImageIcon constructor is relative to the location of the current class, and will be resolved to an absolute URL. Return new ImageIcon(imgURL, description) Protected ImageIcon createImageIcon(String path, Here are examples of toolWindowStructure./** Returns an ImageIcon, or null if the path was invalid. The IconLoader class will load the icon that matches the best depending on the current environment. IconName_dark.png W x H pixels (Will be used on non-Retina devices with Darcula 2*W x 2*H pixels (Will be used on Retina devices with Darcula theme)

IconName.png W x H pixels (Will be used on non-Retina devices with default 2*W x 2*H pixels (Will be used on Retina devices with default theme) Please consider using SVG icons for optimal results if your plugin targets 2018.2+.Īll icon files must be placed in the same directory following this naming pattern (replace. If the icon graphics are simple enough so that it renders perfectly in every scale, then the version can be omitted.įor generating the SVG icons suited for the IntelliJ-based IDEs, you may also use the third-party web tool IntelliJ Icon Generator. The icon graphics of such an icon can be expressed in more details via double precision. However, the version of an SVG icon should still provide the same base size. The naming notation used for PNG icons (see below) is still relevant. Then define a class/interface in a top-level package called icons holding icon constants as static fields: The path to the icon passed in as argument to IconLoader.getIcon() must start with leading /. The getIcon() method of IconLoader can be used to access the icons. The best way to deal with icons and other image resources is to put them to a dedicated source root marked as Resources Root, say icons or resources. See Action Basics sample plugin as reference. If custom icons are required, please refer to detailed design guide. Icons from plugins are located in corresponding Icons class (e.g., GithubIcons). Plugins should reuse existing platform icons whenever possible. For more information see the Plugin Logo. Plugin Logos, which represent a plugin itself, have different requirements than icons and images used within a plugin. Plugins need icons mostly for actions, custom components renderers, tool windows, and so on. Icons and images are used widely by IntelliJ Platform plugins.

Swing set icon image