Change theme of BaseMetroDialog

Hello, im very new to this framework and im trying to change the theme of a BaseMetroDialog.

My goal is simple, if i have an error message i want the theme to be Red, if i have a warning message i want the theme to be Orange and so on… I tried to do something like this: https://stackoverflow.com/questions/44881218/metrodialog-with-custom-background-color but i got nothing.

Now im trying to execute this code:

            var themes = ThemeManager.Current.DetectTheme().Resources;
            themes["Theme.ThemeInstance"] = ThemeManager.Current.GetTheme("Light.Red");

            var mySettings = new MetroDialogSettings()
            {
                AffirmativeButtonText = "Hi",
                NegativeButtonText = "Go away!",
                FirstAuxiliaryButtonText = "Cancel",
                CustomResourceDictionary = themes,
                ColorScheme = MetroDialogColorScheme.Theme
            };

             
            MessageDialogResult result = await this.ShowMessageAsync("Hello!", "Welcome to the world of metro! ",
                MessageDialogStyle.AffirmativeAndNegativeAndSingleAuxiliary, mySettings);

But it was also unsuccessful.

But i noticed something interesting, if i change to this:

            var themes = ThemeManager.Current.DetectTheme().Resources;
            themes["Theme.ThemeInstance"] = Brushes.Red;

            var mySettings = new MetroDialogSettings()
            {
                AffirmativeButtonText = "Hi",
                NegativeButtonText = "Go away!",
                FirstAuxiliaryButtonText = "Cancel",
                CustomResourceDictionary = themes,
                ColorScheme = MetroDialogColorScheme.Inverted
            };

             
            MessageDialogResult result = await this.ShowMessageAsync("Hello!", "Welcome to the world of metro! ",
                MessageDialogStyle.AffirmativeAndNegativeAndSingleAuxiliary, mySettings);

i get an exception: which means that, this value is converted somewhere to ControlzEx.Theming.Theme, but still it’s never used or displayed.

I’d be very pleased for some help on this!

Environment

MahApps.Metro version: v2.4.7
Windows build number: Win10
Visual Studio: 2019 16.10.2
Target Framework: .Net Core 3.1

[timunie]

Hi all

I saw the same, any custom Style or Brush is ignored. So I think this is a bug and should be fixed in a separate ticket.

The other question is a change request. I think Jan @punker76 should give us a feedback how one should handle that the easiest

Ideas could be

• provide different styles to the dialog (I would prefer this as it is quite flexible and also an icon can be implemented)
• add more properties to change
• add an enum as suggested by you @lpereira98

Happy coding Tim

[lpereira98]

I feel like MetroDialogSettings.CustomResourceDictionary is a bit ignored, it just doesn’t change anything on BaseDialog.

I’ve made a change in this library to do what i want: Commit

Usage:

            ResourceDictionary resourceDictionary = new ResourceDictionary();
            //Light.Red to display an error
            resourceDictionary.Add("Theme.Instance", ThemeManager.Current.GetTheme("Light.Red"));

            var mySettings = new MetroDialogSettings()
            {
                AffirmativeButtonText = "Hi",
                NegativeButtonText = "Go away!",
                FirstAuxiliaryButtonText = "Cancel"       
                , CustomResourceDictionary = resourceDictionary,
                ColorScheme = MetroDialogColorScheme.Accented
            };

             
            MessageDialogResult result = await this.ShowMessageAsync("Hello!", "Welcome to the world of metro! ",
                MessageDialogStyle.AffirmativeAndNegativeAndSingleAuxiliary, mySettings);

With this, the whole Dialog theme will be changed to the theme specified on MetroDialogSettings.CustomResourceDictionary with key=“Theme.Instance”. Even tho this solves my problem, i would still prefer to have one more parameter on ShowMessageAsync describing the type of message (Error, warning, info,… ). Another question is, could my solution be part of this repository ? Should i make a PR ?

@timunie thanks for trying to help!