Allow triple left click on a TextBox to select all text - #4081
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corvinsz
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Aug 13, 2026
corvinsz
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I few things I noticed:
- We should type check against
TextBoxBaseso this behavior also works for theRichTextBox - Maybe an example dedicated to this attached property with a small description would be helpful, especially because this behavior is not something consumers can "just see". Please don't forget the MD3 demo app 😄
- In my opinion the test you added should also test the negative (
materialDesign:TextFieldAssist.SelectAllOnTripleClick="False") behavior to prevent any regressions.
| DependencyObject d, | ||
| DependencyPropertyChangedEventArgs e) | ||
| { | ||
| if (d is TextBox textBox) |
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| if (d is TextBox textBox) | |
| if (d is TextBoxBase textBox) |
| object sender, | ||
| MouseButtonEventArgs e) | ||
| { | ||
| if (e.ClickCount == 3 && sender is TextBox textBox) |
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| if (e.ClickCount == 3 && sender is TextBox textBox) | |
| if (e.ClickCount == 3 && sender is TextBoxBase textBox) |
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Triple clicking in a textbox to select all text is a common action on Windows applications