Manipulation on TextBox is not that smooth

Question

I referenced answer here  to make TextBox can be manipulated. But I found there is a problem that the moving or rotating is not that smooth just like other elements. Maybe it's because the manipulate delta on textbox is too big. I am not sure and i don't know how to fix it.

Have anyone met this probelem and is there any solution?

Answer 1

Can you please explain in more detail what you are doing, and what you mean by the moving and rotating not being smooth? Can you provide a Minimal, Complete, and Verifiable example, exact repro steps, and a clear description of the expected behaviour and how it differs from the actual behaviour?

Manipulation delta will not depend on the specific control.

--Rob

Answer 2

Can you please explain in more detail what you are doing, and what you mean by the moving and rotating not being smooth? Can you provide a Minimal, Complete, and Verifiable example, exact repro steps, and a clear description of the expected behaviour and how it differs from the actual behaviour?

Manipulation delta will not depend on the specific control.

--Rob

I am adding a TextBox on the Canvas and i want to move and rotate and scale the TextBox with my fingers.

xaml part is like this:

<TextBox Name="txtBox" TextWrapping="Wrap" AcceptsReturn="True" 
                ScrollViewer.ZoomMode="Disabled"
                ScrollViewer.VerticalScrollMode ="Disabled"
                ScrollViewer.HorizontalScrollMode ="Disabled"
                FontSize="14"
                Canvas.ZIndex="0" />
        

And the code behind is like below:

txtBox.ManipulationMode = ManipulationModes.All;
            
            txtBox.AddHandler(UIElement.TappedEvent, new TappedEventHandler(OnTextBoxTapped), true);
            txtBox.AddHandler(UIElement.PointerPressedEvent, new PointerEventHandler(OnTextBoxPointerPressed), true);
            txtBox.AddHandler(UIElement.HoldingEvent, new HoldingEventHandler(OnTextBoxfHolding), true);
            txtBox.AddHandler(UIElement.ManipulationStartingEvent, new ManipulationStartingEventHandler(CompManipulationStarting), true);
            txtBox.AddHandler(UIElement.ManipulationStartedEvent, new ManipulationStartedEventHandler(CompManipulationStarted), true);
            txtBox.AddHandler(UIElement.ManipulationDeltaEvent, new ManipulationDeltaEventHandler(CompManipulationDelta), true);
            txtBox.AddHandler(UIElement.ManipulationCompletedEvent, new ManipulationCompletedEventHandler(CompManipulationCompleted), true);
            txtBox.AddHandler(UIElement.ManipulationInertiaStartingEvent, new ManipulationInertiaStartingEventHandler(CompManipulationInertiaStarting), true);

All those handlers make "Handled" of EventArgs to be false to let the events to be passed up to parent elements.

What i mean not smooth is, on moving or rotating on other elements like rectangle we feel it moves continuously, but for TextBox it just don't move with small distance and a big jump if you move a long distance. It's easy to duplicate it.

Answer 3

Can you share a Minimal, Complete, and Verifiable example on your OneDrive? Please also include exact repro steps and a clear description of the expected behaviour and how it differs from the actual behaviour.