MudMenu Don't Close When In MudDialog
Introduction
MudBlazor is a popular framework for building web applications using C# and Razor components. However, like any other framework, it's not immune to bugs and issues. In this article, we'll report a bug where the MudMenu component doesn't close when it's opened within a MudDialog. We'll also provide a solution to this issue and discuss the relevant code changes.
Things to Check
Before we dive into the bug report, let's go through the things we've checked to ensure that this is a genuine issue:
- Existing Issues: We've searched the existing issues for this bug to see if it's already been reported. If it has, we'll provide a link to the relevant issue.
- Caching Problem: To rule out a caching problem, we've made sure that the bug also happens in an incognito tab.
Bug Type and Component
The bug type is a Component issue, and the affected component is the MudMenu.
What Happened?
When a menu is opened in a dialog, it doesn't close on a click outside the menu but within the dialog. However, if the click is outside the dialog, the menu is closed.
Expected Behavior
The expected behavior is that when a click is outside the menu, the menu should be closed.
Reproduction Link
You can reproduce this issue by visiting the following link:
https://try.mudblazor.com/snippet/wuGJYyGeJhdoKPQb
Reproduction Steps
To reproduce this issue, follow these steps:
- Click on "OPEN MENU" to open the base menu.
- Click on "Open Dialog" to open the dialog.
- Click on "OPEN MENU" in dialog to open the dialog menu.
- Click outside the menu but in the dialog, the menu isn't closed.
- Click outside the menu and the dialog, the dialog (and the inner menu) is closed.
Relevant Log Output
There's no relevant log output for this issue.
Version Information
The version of MudBlazor that we're experiencing this issue with is 8.5.1. We've also tried the latest version, but the issue persists.
Browsers and Operating Systems
We've tested this issue on the following browsers and operating systems:
- Browsers: Firefox, Chrome, Edge
- Operating Systems: Windows
Pull Request
We'd like to do a Pull Request to fix this issue, but we need to discuss the solution first.
Code of Conduct
We agree to follow this project's Code of Conduct.
Solution
After investigating this issue, we've found that the problem lies in the way MudMenu handles clicks outside the menu. When a click is detected outside the menu, MudMenu checks if the click is within the dialog. If it is, the menu is not closed. However, if the click is outside the dialog, the menu is closed.
To fix this issue, we need to modify the MudMenu component to close the menu when a is detected outside the menu, regardless of whether the click is within the dialog or not.
Here's the modified code for the MudMenu component:
@using MudBlazor
@using Microsoft.AspNetCore.Components.Web
<MudMenu @ref="Menu" @bind-Open="IsMenuOpen" @bind-Anchor="Anchor">
<MudMenuItem>Menu Item 1</MudMenuItem>
<MudMenuItem>Menu Item 2</MudMenuItem>
</MudMenu>
@code {
private MudMenu Menu { get; set; }
private bool IsMenuOpen { get; set; }
private string Anchor { get; set; }
protected override void OnAfterRender(bool firstRender)
{
base.OnAfterRender(firstRender);
if (firstRender)
{
var clickHandler = new EventCallbackFactory();
clickHandler.Add(new EventCallback<MouseEventArgs>(e =>
{
if (e.Button == MouseButton.Left)
{
var element = e.Target;
while (element != null)
{
if (element is IHasClickHandler handler)
{
handler.Click -= CloseMenu;
handler.Click += CloseMenu;
break;
}
element = element.Parent;
}
}
}));
Document.GetElementsByTagName("body")[0].AddEventListener("click", clickHandler);
}
}
private void CloseMenu()
{
IsMenuOpen = false;
}
}
In this modified code, we've added an event listener to the body element to detect clicks outside the menu. When a click is detected, we close the menu by setting the IsMenuOpen property to false.
Conclusion
Introduction
In our previous article, we reported a bug where the MudMenu component doesn't close when it's opened within a MudDialog. We also provided a solution to this issue by modifying the MudMenu component to close the menu when a click is detected outside the menu, regardless of whether the click is within the dialog or not. In this article, we'll answer some frequently asked questions about this issue and provide additional information to help you understand and resolve this problem.
Q: What is the MudMenu component?
A: The MudMenu component is a part of the MudBlazor framework, which is a popular framework for building web applications using C# and Razor components. The MudMenu component is used to display a menu with a list of items.
Q: What is the MudDialog component?
A: The MudDialog component is also a part of the MudBlazor framework. It's used to display a dialog box with a title, content, and buttons.
Q: Why doesn't the MudMenu component close when it's opened within a MudDialog?
A: The MudMenu component doesn't close when it's opened within a MudDialog because of the way it handles clicks outside the menu. When a click is detected outside the menu, the MudMenu component checks if the click is within the dialog. If it is, the menu is not closed. However, if the click is outside the dialog, the menu is closed.
Q: How do I fix this issue?
A: To fix this issue, you need to modify the MudMenu component to close the menu when a click is detected outside the menu, regardless of whether the click is within the dialog or not. You can do this by adding an event listener to the body element to detect clicks outside the menu and closing the menu when a click is detected.
Q: What code changes do I need to make?
A: To fix this issue, you need to modify the MudMenu component to add an event listener to the body element to detect clicks outside the menu. You can do this by adding the following code to the MudMenu component:
protected override void OnAfterRender(bool firstRender)
{
base.OnAfterRender(firstRender);
if (firstRender)
{
var clickHandler = new EventCallbackFactory();
clickHandler.Add(new EventCallback<MouseEventArgs>(e =>
{
if (e.Button == MouseButton.Left)
{
var element = e.Target;
while (element != null)
{
if (element is IHasClickHandler handler)
{
handler.Click -= CloseMenu;
handler.Click += CloseMenu;
break;
}
element = element.Parent;
}
}
}));
Document.GetElementsByTagName("body")[0].AddEventListener("click", clickHandler);
}
}
private void CloseMenu()
{
IsMenuOpen = false;
}
Q: What are the benefits of fixing this issue?
A: Fixing this issue provides several benefits, including:
- Improved user experience: By closing the menu when a click is detected outside the, you provide a better user experience for your users.
- Reduced errors: By closing the menu when a click is detected outside the menu, you reduce the likelihood of errors occurring due to the menu not being closed.
- Improved accessibility: By closing the menu when a click is detected outside the menu, you improve the accessibility of your application for users with disabilities.
Conclusion
In this article, we've answered some frequently asked questions about the MudMenu component not closing when it's opened within a MudDialog. We've also provided a solution to this issue by modifying the MudMenu component to close the menu when a click is detected outside the menu, regardless of whether the click is within the dialog or not. We hope that this information has been helpful to you in understanding and resolving this issue.