CODEWITHSUNDEEP
uwpgestureinkcanvas
Kay
Kay

Reputation: 203

How to use "gesture" in UWP inkcanvas

Hello I want to add some customized gesture (i made) functions on inkcanvas

But I don't know how to do that when the inputdevicetype is touch like this

inkcanvas.InkPresenter.InputDeviceTypes = Windows.UI.Core.CoreInputDeviceTypes.Touch;

when the input device type is touch, then i can't use any gestures

Because the all inputs are recognized the drawn

when using inkcanvas with touch input, can't i use gesture functions?

private void ink1_PointerPressed(object sender, PointerRoutedEventArgs e)
    {            
            PointerDeviceType pointerDevType = e.Pointer.PointerDeviceType;

            pointers = new Dictionary<uint, Windows.UI.Xaml.Input.Pointer>();

            e.Handled = true;

            PointerPoint ptrPt = e.GetCurrentPoint(ink1);
            m_pt.Add(ptrPt);

            if (!pointers.ContainsKey(ptrPt.PointerId))
            {
                // Add contact to dictionary.
                pointers[ptrPt.PointerId] = e.Pointer;
            }               

            switch (ptrPt.PointerDevice.PointerDeviceType)
            {
                case Windows.Devices.Input.PointerDeviceType.Mouse:                       
                    ink1.InkPresenter.InputDeviceTypes = Windows.UI.Core.CoreInputDeviceTypes.Mouse;
                    ink1.RightTapped += ink1_RightTapped;

                    break;

                case PointerDeviceType.Touch:
                    if (m_pt.Count == 2)
                    {                            
                        ink1.InkPresenter.InputDeviceTypes = Windows.UI.Core.CoreInputDeviceTypes.None;
                        ink1.RightTapped += ink1_RightTapped;                          


                    }
                    else if (m_pt.Count == 1 || m_pt.Count > 2)
                    {
                        ink1.InkPresenter.InputDeviceTypes = Windows.UI.Core.CoreInputDeviceTypes.Touch;
                        ink1.RightTapped += ink1_RightTapped;

                    }

                break;

            }         


    }

When i press my ink1(inkcanvas) with 2 fingers, then i want to use my gesture functions (draw letter L or tap the inkcanvas 3 times) what i made

such as uwp's doubletapped, righttapped etc.

Upvotes: 0

Views: 295

Answers (1)

Sunteen Wu
Sunteen Wu

Reputation: 10627

I saw you use the PointerPress event handle for InkCanvas.
The configuration of the InkPresenter determines the pointer event handling behavior of the InkCanvas. You must set InkPresenter.InputDeviceTypes to CoreInputDeviceTypes.None for the InkCanvas to process pointer events, otherwise they are passed to the InkPresenter object.

To handle pointer events with the InkPresenter object, you must set RightDragAction to LeaveUnprocessed to pass the input through as UnprocessedInput for custom processing by your app.

inkCanvas.InkPresenter.InputProcessingConfiguration.RightDragAction =  InkInputRightDragAction.LeaveUnprocessed;

Details please reference the remark section of InkCanvas.

Upvotes: 1

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