接着上一篇 html
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在使用過程當中當應用太多很難快速的找到並定位到本身所須要使用的應用,因此這次作了更新方便快速查找應用。github
【update】
一、輸入應用首字的首字母定位。
ide
鍵盤按下 KeyDown ui
定義ScrollViewer 所須要滾動值 double offset = 0.0;。this
定義 bool isFind = false; 若是爲 True 找到就不查找控件。spa
一、經過FindChild查找ScrollViewer方便最後定位使用。code
ScrollViewer scrollViewer = ControlsHelper.FindChild<ScrollViewer>(this.AppSwitchList, "PART_ScrollViewer");htm
二、經過FindVisualChildren查找我所定義DataTemplate下的Border。blog
var elementList = ControlsHelper.FindVisualChildren<Border>(this.AppSwitchList).ToList();
三、循環 elementList 集合,判斷 Tag 不等於 null 時對 offset += element.ActualHeight ,而且相等於按下鍵盤的Key值。
if (element.Tag != null && element.Tag.ToString().Equals(_key))
四、定位到找到的第一個與Key相等的。
scrollViewer.ScrollToVerticalOffset(offset);
var _key = Win32Api.GetCharFromKey(e.Key).ToString().ToUpper(); if (string.IsNullOrWhiteSpace(_key)) return; double offset = 0.0; ScrollViewer scrollViewer = ControlsHelper.FindChild<ScrollViewer>(this.AppSwitchList, "PART_ScrollViewer"); var elementList = ControlsHelper.FindVisualChildren<Border>(this.AppSwitchList).ToList(); bool isFind = false; for (int i = 0; i < elementList.Count; i++) { var element = elementList[i]; if (isFind) break; if (element.Tag != null) { offset += element.ActualHeight; if (element.Tag.ToString().Equals(_key)) { offset -= element.ActualHeight; scrollViewer.ScrollToVerticalOffset(offset); isFind = true; } } } this.KeyDownText.Text = _key; this.KeyDownPanel.Visibility = Visibility.Visible;
獲取按鍵轉譯
public enum MapType : uint { MAPVK_VK_TO_VSC = 0x0, MAPVK_VSC_TO_VK = 0x1, MAPVK_VK_TO_CHAR = 0x2, MAPVK_VSC_TO_VK_EX = 0x3, } [DllImport("user32.dll")] public static extern int ToUnicode( uint wVirtKey, uint wScanCode, byte[] lpKeyState, [Out, MarshalAs(UnmanagedType.LPWStr, SizeParamIndex = 4)] StringBuilder pwszBuff, int cchBuff, uint wFlags); [DllImport("user32.dll")] public static extern bool GetKeyboardState(byte[] lpKeyState); [DllImport("user32.dll")] public static extern uint MapVirtualKey(uint uCode, MapType uMapType); public static char GetCharFromKey(Key key) { char ch = ' '; int virtualKey = KeyInterop.VirtualKeyFromKey(key); byte[] keyboardState = new byte[256]; GetKeyboardState(keyboardState); uint scanCode = MapVirtualKey((uint)virtualKey, MapType.MAPVK_VK_TO_VSC); StringBuilder stringBuilder = new StringBuilder(2); int result = ToUnicode((uint)virtualKey, scanCode, keyboardState, stringBuilder, stringBuilder.Capacity, 0); switch (result) { case -1: break; case 0: break; case 1: { ch = stringBuilder[0]; break; } default: { ch = stringBuilder[0]; break; } } return ch; }
擡起後隱藏
Thread.Sleep(300); this.KeyDownPanel.Visibility = Visibility.Collapsed;
效果圖