108 lines
3.8 KiB
Markdown
108 lines
3.8 KiB
Markdown
# Frameless Window
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A frameless window is a window that has no
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[chrome](https://developer.mozilla.org/en-US/docs/Glossary/Chrome), the parts of
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the window, like toolbars, that are not a part of the web page. These are
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options on the [`BrowserWindow`](browser-window.md) class.
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## Create a frameless window
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To create a frameless window, you need to set `frame` to `false` in
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[BrowserWindow](browser-window.md)'s `options`:
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```javascript
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const BrowserWindow = require('electron').BrowserWindow;
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var win = new BrowserWindow({ width: 800, height: 600, frame: false });
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```
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### Alternatives on OS X
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On Mac OS X 10.10 Yosemite and newer, there's an alternative way to specify
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a chromeless window. Instead of setting `frame` to `false` which disables
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both the titlebar and window controls, you may want to have the title bar
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hidden and your content extend to the full window size, yet still preserve
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the window controls ("traffic lights") for standard window actions.
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You can do so by specifying the new `titleBarStyle` option:
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```javascript
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var win = new BrowserWindow({ 'titleBarStyle': 'hidden' });
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```
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## Transparent window
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By setting the `transparent` option to `true`, you can also make the frameless
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window transparent:
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```javascript
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var win = new BrowserWindow({ transparent: true, frame: false });
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```
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### Limitations
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* You can not click through the transparent area. We are going to introduce an
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API to set window shape to solve this, see
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[our issue](https://github.com/electron/electron/issues/1335) for details.
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* Transparent windows are not resizable. Setting `resizable` to `true` may make
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a transparent window stop working on some platforms.
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* The `blur` filter only applies to the web page, so there is no way to apply
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blur effect to the content below the window (i.e. other applications open on
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the user's system).
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* On Windows operation systems, transparent windows will not work when DWM is
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disabled.
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* On Linux users have to put `--enable-transparent-visuals --disable-gpu` in
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the command line to disable GPU and allow ARGB to make transparent window,
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this is caused by an upstream bug that [alpha channel doesn't work on some
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NVidia drivers](https://code.google.com/p/chromium/issues/detail?id=369209) on
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Linux.
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* On Mac the native window shadow will not be shown on a transparent window.
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## Draggable region
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By default, the frameless window is non-draggable. Apps need to specify
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`-webkit-app-region: drag` in CSS to tell Electron which regions are draggable
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(like the OS's standard titlebar), and apps can also use
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`-webkit-app-region: no-drag` to exclude the non-draggable area from the
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draggable region. Note that only rectangular shapes are currently supported.
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To make the whole window draggable, you can add `-webkit-app-region: drag` as
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`body`'s style:
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```html
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<body style="-webkit-app-region: drag">
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</body>
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```
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And note that if you have made the whole window draggable, you must also mark
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buttons as non-draggable, otherwise it would be impossible for users to click on
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them:
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```css
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button {
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-webkit-app-region: no-drag;
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}
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```
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If you're setting just a custom titlebar as draggable, you also need to make all
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buttons in titlebar non-draggable.
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## Text selection
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In a frameless window the dragging behaviour may conflict with selecting text.
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For example, when you drag the titlebar you may accidentally select the text on
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the titlebar. To prevent this, you need to disable text selection within a
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draggable area like this:
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```css
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.titlebar {
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-webkit-user-select: none;
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-webkit-app-region: drag;
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}
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```
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## Context menu
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On some platforms, the draggable area will be treated as a non-client frame, so
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when you right click on it a system menu will pop up. To make the context menu
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behave correctly on all platforms you should never use a custom context menu on
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draggable areas.
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