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a7d66e67e0
There was a bigger change here, but the approach turned out to have some problems with large sets. The current app saves and restores the selected rows when you make an edit, retaining the set of selected bytes even if the number of lines changes (maybe you reformatted bytes into a string). There's no way to do that quickly with WPF when the number of selected items gets large (say 10K+). I will probably just cap the selection, and refuse to restore it if it exceeds a certain size. The ListView SelectedItems management seems to use an O(n^2) (or worse) algorithm. It might be trying to verify that items being added to SelectedItems actually exist in Items -- I can see it calling Contains(). Whatever the case, it's a big step backward performance-wise from WinForms. Yay WPF. See the DisasmUiTest project's Selection Test to see what I tried.
171 lines
5.9 KiB
C#
171 lines
5.9 KiB
C#
/*
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* Copyright 2019 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Linq;
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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Shapes;
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namespace SourceGenWPF.ProjWin {
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/// <summary>
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/// Interaction logic for MainWindow.xaml
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/// </summary>
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public partial class MainWindow : Window, INotifyPropertyChanged {
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/// <summary>
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/// Disassembled code display list provided to XAML.
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/// </summary>
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public DisplayList CodeDisplayList { get; private set; }
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/// <summary>
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/// </summary>
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private MainController mMainCtrl;
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private MethodInfo listViewSetSelectedItems;
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public MainWindow() {
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InitializeComponent();
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listViewSetSelectedItems = codeListView.GetType().GetMethod("SetSelectedItems",
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BindingFlags.NonPublic | BindingFlags.Instance);
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Debug.Assert(listViewSetSelectedItems != null);
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this.DataContext = this;
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CodeDisplayList = new DisplayList();
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codeListView.ItemsSource = CodeDisplayList;
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mMainCtrl = new MainController(this);
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//GridView gv = (GridView)codeListView.View;
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//gv.Columns[0].Width = 50;
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}
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private void Window_Loaded(object sender, RoutedEventArgs e) {
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mMainCtrl.WindowLoaded();
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#if DEBUG
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// Get more info on CollectionChanged events that do not agree with current
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// state of Items collection.
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PresentationTraceSources.SetTraceLevel(codeListView.ItemContainerGenerator,
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PresentationTraceLevel.High);
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}
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#endif
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/// <summary>
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/// INotifyPropertyChanged event
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/// </summary>
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public event PropertyChangedEventHandler PropertyChanged;
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/// <summary>
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/// Call this when a notification-worthy property changes value.
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///
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/// The CallerMemberName attribute puts the calling property's name in the first arg.
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/// </summary>
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/// <param name="propertyName">Name of property that changed.</param>
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private void OnPropertyChanged([CallerMemberName] string propertyName = "") {
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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private bool mShowCodeListView;
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/// <summary>
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/// Which panel are we showing, launchPanel or codeListView?
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/// </summary>
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public bool ShowCodeListView {
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get {
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return mShowCodeListView;
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}
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set {
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mShowCodeListView = value;
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OnPropertyChanged("LaunchPanelVisibility");
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OnPropertyChanged("CodeListVisibility");
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}
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}
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/// <summary>
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/// Returns true if we should be showing the launch panel.
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/// (Intended for use from XAML.)
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/// </summary>
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public Visibility LaunchPanelVisibility {
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get { return mShowCodeListView ? Visibility.Hidden : Visibility.Visible; }
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}
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/// <summary>
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/// Returns true if we should be showing the code ListView.
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/// (Intended for use from XAML.)
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/// </summary>
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public Visibility CodeListVisibility {
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get { return mShowCodeListView ? Visibility.Visible : Visibility.Hidden; }
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}
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/// Version string, for display.
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/// </summary>
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public string ProgramVersionString {
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get { return App.ProgramVersion.ToString(); }
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}
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private void AssembleCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
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// test
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Debug.WriteLine("assembling");
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}
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private void SelectAllCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
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DateTime start = DateTime.Now;
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codeListView.SelectAll();
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//codeListView.SelectedItems.Clear();
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//foreach (var item in codeListView.Items) {
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// codeListView.SelectedItems.Add(item);
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//}
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// This seems to be faster than setting items individually (10x), but is still O(n^2)
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// or worse, and hence unsuitable for very large lists.
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//codeListView.SelectedItems.Clear();
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//listViewSetSelectedItems.Invoke(codeListView, new object[] { codeListView.Items });
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Debug.WriteLine("Select All cmd: " + (DateTime.Now - start).Milliseconds + " ms");
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}
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private void RecentProjectCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
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if (!int.TryParse((string)e.Parameter, out int recentIndex) ||
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recentIndex < 0 || recentIndex >= MainController.MAX_RECENT_PROJECTS) {
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throw new Exception("Bad parameter: " + e.Parameter);
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}
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Debug.WriteLine("Recent project #" + recentIndex);
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mMainCtrl.OpenRecentProject(recentIndex);
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}
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private void CodeListView_SelectionChanged(object sender, SelectionChangedEventArgs e) {
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//Debug.WriteLine("SEL: add " + e.AddedItems.Count + ", rem " + e.RemovedItems.Count);
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}
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}
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}
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