224 lines
6.9 KiB
C#
224 lines
6.9 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using System.Windows;
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using System.Windows.Controls;
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using WinAlfred.Plugin;
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namespace WinAlfred
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{
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public partial class ResultPanel : UserControl
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{
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public bool Dirty { get; set; }
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public delegate void ResultItemsChanged();
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public event ResultItemsChanged resultItemChangedEvent;
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protected virtual void OnResultItemChangedEvent()
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{
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ResultItemsChanged handler = resultItemChangedEvent;
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if (handler != null) handler();
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}
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public void AddResults(List<Result> results)
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{
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if (results.Count == 0) return;
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if (Dirty)
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{
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Dirty = false;
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pnlContainer.Children.Clear();
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}
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for (int i = 0; i < results.Count; i++)
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{
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Result result = results[i];
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if (!CheckExisted(result))
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{
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ResultItem control = new ResultItem(result);
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control.SetIndex(i + 1);
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pnlContainer.Children.Insert(GetInsertLocation(result.Score), control);
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}
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}
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SelectFirst();
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pnlContainer.UpdateLayout();
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double resultItemHeight = 0;
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if (pnlContainer.Children.Count > 0)
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{
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var resultItem = pnlContainer.Children[0] as ResultItem;
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if (resultItem != null)
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resultItemHeight = resultItem.ActualHeight;
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}
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pnlContainer.Height = pnlContainer.Children.Count * resultItemHeight;
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OnResultItemChangedEvent();
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}
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private bool CheckExisted(Result result)
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{
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return pnlContainer.Children.Cast<ResultItem>().Any(child => child.Result.Equals(result));
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}
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private int GetInsertLocation(int currentScore)
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{
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int location = pnlContainer.Children.Count;
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if (pnlContainer.Children.Count == 0) return 0;
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if (currentScore > ((ResultItem)pnlContainer.Children[0]).Result.Score) return 0;
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for (int index = 1; index < pnlContainer.Children.Count; index++)
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{
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ResultItem next = pnlContainer.Children[index] as ResultItem;
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ResultItem prev = pnlContainer.Children[index - 1] as ResultItem;
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if (next != null && prev != null)
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{
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if ((currentScore >= next.Result.Score && currentScore <= prev.Result.Score))
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{
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location = index;
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}
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}
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}
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return location;
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}
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public int GetCurrentResultCount()
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{
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return pnlContainer.Children.Count;
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}
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public int GetCurrentSelectedResultIndex()
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{
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for (int i = 0; i < pnlContainer.Children.Count; i++)
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{
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var resultItemControl = pnlContainer.Children[i] as ResultItem;
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if (resultItemControl != null && resultItemControl.Selected)
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{
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return i;
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}
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}
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return -1;
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}
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public void UnSelectAll()
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{
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for (int i = 0; i < pnlContainer.Children.Count; i++)
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{
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var resultItemControl = pnlContainer.Children[i] as ResultItem;
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if (resultItemControl != null && resultItemControl.Selected)
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{
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resultItemControl.Selected = false;
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}
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}
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}
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public void SelectNext()
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{
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int index = GetCurrentSelectedResultIndex();
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if (index == pnlContainer.Children.Count - 1)
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{
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index = -1;
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}
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Select(index + 1);
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}
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public void SelectPrev()
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{
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int index = GetCurrentSelectedResultIndex();
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if (index == 0)
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{
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index = pnlContainer.Children.Count;
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}
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Select(index - 1);
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}
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private void Select(int index)
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{
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if (pnlContainer.Children.Count > 0)
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{
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int oldIndex = GetCurrentSelectedResultIndex();
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UnSelectAll();
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var resultItemControl = pnlContainer.Children[index] as ResultItem;
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if (resultItemControl != null)
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{
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resultItemControl.Selected = true;
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double scrollPosition = 0;
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Point newItemBottomPoint = resultItemControl.TranslatePoint(new Point(0, resultItemControl.ActualHeight), pnlContainer);
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if (index == 0)
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{
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sv.ScrollToTop();
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return;
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}
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if (index == pnlContainer.Children.Count - 1)
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{
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sv.ScrollToBottom();
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return;
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}
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if (index < oldIndex)
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{
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//move up and old item is at the top of the scroll view
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if (newItemBottomPoint.Y - sv.VerticalOffset == 0)
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{
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scrollPosition = sv.VerticalOffset - resultItemControl.ActualHeight;
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}
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else
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{
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return;
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}
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}
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else
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{
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//move down and old item is at the bottom of scroll view
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if (sv.ActualHeight + sv.VerticalOffset == newItemBottomPoint.Y - resultItemControl.ActualHeight)
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{
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scrollPosition = newItemBottomPoint.Y - sv.ActualHeight;
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}
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else
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{
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return;
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}
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}
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sv.ScrollToVerticalOffset(scrollPosition);
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}
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}
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}
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public void SelectFirst()
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{
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Select(0);
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}
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public bool AcceptSelect()
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{
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int index = GetCurrentSelectedResultIndex();
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var resultItemControl = pnlContainer.Children[index] as ResultItem;
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if (resultItemControl != null)
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{
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if (resultItemControl.Result.Action != null)
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{
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resultItemControl.Result.Action();
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}
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return !resultItemControl.Result.DontHideWinAlfredAfterAction;
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}
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return true;
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}
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public ResultPanel()
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{
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InitializeComponent();
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}
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public void Clear()
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{
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pnlContainer.Children.Clear();
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pnlContainer.Height = 0;
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OnResultItemChangedEvent();
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}
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}
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} |