I have a <dxe:TextEdit/> control in my UserControl in WPF application. The TextEdit control has a template which is containing a TextBlock. So when the TextEdit is not clicked/focused then it is in readonly mode for a purpose. And when focused then user can type in TextEdit. So, I am using IsKeyboardFocusWithin boolean property in the datatrigger in styling of the TextEdit. If the property value is false then TextEdit is in readonly mode otherwise in edit mode. But even I focus on the control it does not go in edit mode.

CodePudding user response：

Somehow Keyboard focus is overwriting by any other control and focus moves away from the TextEdit. To focus forcefully, I have created an extra event so that it stays focused on TextEdit.

In usercontrol.xaml file:

 <dxe:TextEdit Name="WaterMarkTextEdit" 
                              NullText="Type something..."
                              EditValue="Text edit box with water mark and drop shadow"
                              Style="{StaticResource TextEditWithWaterMarkAndDropShadowStyle}"
                              IsKeyboardFocusWithinChanged="WaterMarkTextEdit_OnIsKeyboardFocusWithinChanged"
                              MaxWidth="230" 
                              Height="60"
                              Margin="0,30"/>

In usercontrol.xaml.cs file:

//-----------------------------------------------------------------------------------------
            /// <summary>
            /// The event handler to force the keyboard focus; because somehow focus is moving away
            /// and keyboard is losing it's focus for the current control
            /// </summary>
            private void WaterMarkTextEdit_OnIsKeyboardFocusWithinChanged(object sender, DependencyPropertyChangedEventArgs e)
            {
                if ((bool)e.NewValue)
                {
                    Dispatcher.BeginInvoke(DispatcherPriority.Input,
                        new Action(delegate () {
                            Keyboard.Focus(WaterMarkTextEdit); // Set Keyboard Focus
                        }));
                }
            }

CodePudding user response：

Keyboard focus is overwriting by any other control and focus moves away from the text edit.