处理触摸和手势事件 [英] Processing Touch and Gesture Events

问题描述

我正在使用一个GUI，该GUI涉及手势输入，该手势输入来自与Windows 7计算机连接的电容式触摸面板.该操作系统已安装了Tablet PC支持驱动程序，而这些驱动程序应该是进行通讯的唯一方法.

I am working on a GUI that involves gesture input coming from a capacitive touch panel that is connected to a Windows 7 machine. The OS has Tablet PC support drivers installed and those should be the only mean of communicating.

我的主要方法是使用Microsoft.ink.dll中引用的InkCollector类.它使我能够访问SystemGesture事件，这些事件足以实现我要寻找的行为.

My primary approach is to use InkCollector class that is referenced inside Microsoft.ink.dll. It gives me access to SystemGesture events which are sufficient to implement the behaviour I am seeking for.

现在的问题是，大约一秒钟之后，SystemGesture.Flick事件到达的速度非常慢.我了解到正在进行识别Flick的过程，但这仍然使该想法无法使用.

Now the problem is that the SystemGesture.Flick event arrives very slowly, after about a full second. I understand that there is processing going on to recognize the Flick, but it still makes the idea unusuable.

关于如何加快速度的任何想法?

Any ideas of how to speed things up?

我的初始化代码如下:

  public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            InkCollector inkCollector = new InkCollector(this);
            inkCollector.CollectionMode = CollectionMode.GestureOnly;
            inkCollector.Enabled = true;

            inkCollector.SetGestureStatus(ApplicationGesture.AllGestures, true);

            inkCollector.SystemGesture += SystemGestureEventHandler;
            inkCollector.Gesture += GestureEventHandler;
        }

        public void SystemGestureEventHandler(object o, InkCollectorSystemGestureEventArgs args)
        {
            switch (args.Id)
            {
                case SystemGesture.Drag:
                    outputText.AppendText("Drag" + Environment.NewLine);
                    break;
                case SystemGesture.DoubleTap:
                    outputText.AppendText("DoubleTap"+ Environment.NewLine);
                    break;
                case SystemGesture.Flick:
                    outputText.AppendText("Flick"+ Environment.NewLine);
                    break;
                case SystemGesture.HoldEnter:
                    outputText.AppendText("HoldEnter"+ Environment.NewLine);
                    break;
                case SystemGesture.HoldLeave:
                    outputText.AppendText("HoldLeave" + Environment.NewLine);
                    break;
                case SystemGesture.Tap:
                    outputText.AppendText("Tap"+ Environment.NewLine);
                    break;
                default:
                        break;
            }
        }

    public void GestureEventHandler(object o, InkCollectorGestureEventArgs args)
        {
            foreach (Gesture gesture in args.Gestures)
            {
                switch (gesture.Id)
                {
                    case ApplicationGesture.ArrowDown:
                        outputText.AppendText("Gesture: Arrow Down"+ Environment.NewLine);
                        break;
                    case ApplicationGesture.ArrowUp:
                        outputText.AppendText("Gesture: Arrow Up" + Environment.NewLine);
                        break;
                    case ApplicationGesture.Down:
                        outputText.AppendText("Gesture: Down" + Environment.NewLine);
                        break;
                    case ApplicationGesture.Up:
                        outputText.AppendText("Gesture: Up" + Environment.NewLine);
                        break;
                    default:
                        break;
                }
            }

推荐答案

经过一番挖掘，我发现延迟实际上是故意的，并导致手势无法识别和完成.不幸的是，无法修改此超时(请参阅: https://msdn.microsoft.com /en-us/library/ms827533.aspx ).

After some digging I found that the delay was actually intentional and served as a timeout for a gesture to be recognized and complete. Unfortunately, this timeout cannot be modified (see: https://msdn.microsoft.com/en-us/library/ms827533.aspx).

我不得不将墨水收集模式更改为:

I had to change the ink collection mode to:

inkCollector.CollectionMode = CollectionMode.InkAndGesture;

并将墨迹渲染禁用到控件上:

and disable the ink rendering onto control:

inkCollector.DynamicRendering = false;

这篇关于处理触摸和手势事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！