PopupManager: improve its API to provide handling of the keyboard input

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Completed

Last Updated: 15 Dec 2020 13:34 by ADMIN

Release R1 2021

Riziq

Created on: 23 Dec 2019 11:14

Category: PopupEditor

Type: Feature Request

PopupManager: improve its API to provide handling of the keyboard input

Use case: when RadPopupEditor is opened, the focus is sent to the popup control which handles all the pressed keys. It would be added public API which provides the possibility to plug into this keyboard handling and customize the behavior.

For example, when the popup is opened, pressing Escape, closes the popup. This functionality comes from the RadPopupContainerForm.OnKeyDown which behavior can't be overridden.

Currently, only the listener can be removed for a certain popup:

Private Sub RadPopupEditor_PopupOpened(sender As Object, e As EventArgs) PopupManager.Default.RemovePopup(Me.RadPopupEditor1.PopupEditorElement.PopupContainerForm)
End Sub

UPDATE: The API should allow handling the mouse input as well and the developer should control whether the message will be managed further.

2 comments

ADMIN

Dess | Tech Support Engineer, Principal

Posted on: 24 Dec 2019 08:53

Hello, Riziq,

I am glad that you have found a suitable solution for your custom scenario. Thank you for sharing the code snippet with the community.

However, I can't guarantee that it would work properly in all cases with RadPopupEditor. Feel free to use it if it fits your requirements.

We will definitely consider it when addressing this feedback item in order to provide the best possible API for handling the keyboard in the RadPopupEditor's drop down.

Should you have further questions please let me know.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

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Riziq

Posted on: 23 Dec 2019 13:42

Public Const MOD_ALT As Integer = &H1
Public Const MOD_SHIFT As Integer = &H10
Public Const VK_CONTROL As Integer = &H11
Public Const WM_HOTKEY As Integer = &H312
 
<DllImport("User32.dll")>
Public Shared Function RegisterHotKey(ByVal hwnd As IntPtr, ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer) As Integer
End Function
 
<DllImport("User32.dll")>
Public Shared Function UnregisterHotKey(ByVal hwnd As IntPtr, ByVal id As Integer) As Integer
End Function
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
 
    If m.Msg = WM_HOTKEY Then
 
        Dim id As IntPtr = m.WParam
 
        Select Case (id.ToString)
 
            Case "100"
 
                MsgBox("F2 Pressed")
 
            Case "200"
 
                MsgBox("ALT+D Pressed")
 
            Case "300"
 
                MsgBox("ALT+C Pressed")
 
        End Select
 
    End If
 
    MyBase.WndProc(m)
 
End Sub
 
Public Sub HotKeys_Register()
 
    RegisterHotKey(Me.Handle, 100, Nothing, Keys.F2)
    RegisterHotKey(Me.Handle, 200, MOD_ALT, Keys.D)
    RegisterHotKey(Me.Handle, 300, MOD_ALT, Keys.C)
 
End Sub
 
Public Sub HotKeys_Unregister()
 
    UnregisterHotKey(Me.Handle, 100)
    UnregisterHotKey(Me.Handle, 200)
    UnregisterHotKey(Me.Handle, 300)
 
End Sub
 
Private Sub myPopupEditor_PopupOpened(sender As Object, e As EventArgs) Handles myPopUpEditor.PopupOpened
 
    Me.myLookUpContainer.HotKeys_Register()
 
End Sub
 
Private Sub myPopUpEditor_PopupClosed(sender As Object, args As RadPopupClosedEventArgs) Handles myPopUpEditor.PopupClosed
 
    Me.myLookUpContainer.HotKeys_Unregister()
 
End Sub