Home » Eclipse Projects » Standard Widget Toolkit (SWT) » Windows 11 dark colors mode
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| Re: Windows 11 dark colors mode [message #1859624 is a reply to message #1859361] |
Tue, 20 June 2023 16:18   |
 Marco Maccaferri
Messages: 147
Registered: July 2009 |
Senior Member |
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Well... more than 3000 reads without a single answer... wondering if I'm the only one writing applications with SWT...
Just for the records, after some experiments, I found that basically, on Windows, you have to do everything on your own. Either the OS or SWT (not sure which one) doesn't help you much. The only thing to do is to call OS.setTheme(true) to correctly pain all controls (otherwsie some things will be left light, like the menus and the scrollbars). Doesn't event seems possible to get a notification when the OS switches theme.
Linux seems more "smart" on this matter, providing default colors when the OS is set to dark (but still no notifcations as far as i know...).
OS.setTheme is an attempt to have an API for that, however since OS is well... OS-specific, the only way to use it in a multiplatform application is to use reflection, something like this:
try {
@SuppressWarnings("rawtypes")
Class clazz = Class.forName("org.eclipse.swt.internal." + Platform.PLATFORM + ".OS");
@SuppressWarnings("unchecked")
Method method = clazz.getMethod("setTheme", boolean.class);
method.invoke(null, true);
} catch (Exception e) {
e.printStackTrace();
}
Unfortunately, seems that once you set it to true it can't be changed back (has no effect), this poses some limitations when switching from dark to light.
Any suggestion to make things working better is very welcome.
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| Re: Windows 11 dark colors mode [message #1860197 is a reply to message #1859624] |
Fri, 21 July 2023 12:54 |
Tom Wheeler
Messages: 17
Registered: June 2018 |
Junior Member |
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For our Eclipse RCP application, we were able to make progress by reading "SWT Changes" under the platform release notes for the releases in the interval 4.11 an upwards. Every now and then there are improvements to the Dark Theme support. One of the interesting ones was this: https://eclipse.dev/eclipse/news/4.16/platform_isv.php
It lead us to including the following in our application:
/**
* The string constants are defined in {@link Display}. It is our experience that these theme changes will require
* application restart to display everything properly.
*/
private void darkThemeAdjustments(String themeId) {
Display display = getApplicationDisplay();
if (ThemePreferenceConstants.PREFERENCE_SYMBOL_DARK_THEME.equals(themeId)) {
display.setData("org.eclipse.swt.internal.win32.useDarkModeExplorerTheme", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.useShellTitleColoring", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.menuBarForegroundColor", new Color(display, 0xF9, 0xF9, 0xF9));
display.setData("org.eclipse.swt.internal.win32.menuBarBackgroundColor", new Color(display, 0x38, 0x38, 0x38));
display.setData("org.eclipse.swt.internal.win32.Combo.useDarkTheme", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.all.use_WS_BORDER", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.Canvas.use_WS_BORDER", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.Label.use_WS_BORDER", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.List.use_WS_BORDER", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.Table.use_WS_BORDER", Boolean.TRUE);
display.setData("org.eclipse.swt.internal.win32.Text.use_WS_BORDER", Boolean.TRUE);
}
else {
// This has limited effect because we cannot get back to normal theme without restarting the application.
display.setData("org.eclipse.swt.internal.win32.useDarkModeExplorerTheme", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.menuBarForegroundColor",
SWTResourceManager.getColor(SWT.COLOR_WIDGET_FOREGROUND));
display.setData("org.eclipse.swt.internal.win32.menuBarBackgroundColor",
SWTResourceManager.getColor(SWT.COLOR_WIDGET_BACKGROUND));
display.setData("org.eclipse.swt.internal.win32.Combo.useDarkTheme", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.all.use_WS_BORDER", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.Canvas.use_WS_BORDER", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.Label.use_WS_BORDER", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.List.use_WS_BORDER", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.Table.use_WS_BORDER", Boolean.FALSE);
display.setData("org.eclipse.swt.internal.win32.Text.use_WS_BORDER", Boolean.FALSE);
}
}
Notice that (as far as we know) Eclipse RCP does not support fully switching color theme without restarting the application.
As of Eclipse-RCP-2022-12-R, there are still a few widgets that do not completely support Dark Theme on Windows-11. We have this experience with: Tree headings, Color Picker, Checkboxes and Radio Buttons.
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