From fb72350f9a0b0b75bcb267b19b07d843f80dee37 Mon Sep 17 00:00:00 2001
From: w-mj <w.mingjian@yahoo.com>
Date: Mon, 20 May 2019 21:54:07 +0800
Subject: [PATCH] command on label list control

---
 FileManager_UWP/Controls/LabelListControl.cs  | 29 +++++++++++++++++--
 FileManager_UWP/View/FileListView.xaml.cs     |  7 +++--
 .../ViewModel/FileListViewModel.cs            | 25 +++++++++++++++-
 3 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/FileManager_UWP/Controls/LabelListControl.cs b/FileManager_UWP/Controls/LabelListControl.cs
index 22a6c13..68ec1e2 100644
--- a/FileManager_UWP/Controls/LabelListControl.cs
+++ b/FileManager_UWP/Controls/LabelListControl.cs
@@ -1,4 +1,5 @@
 using FileManager_UWP.Model;
+using GalaSoft.MvvmLight.Command;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
@@ -18,11 +19,22 @@ using Windows.UI.Xaml.Media.Animation;
 // The Templated Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234235
 
 namespace FileManager_UWP.Controls {
+    public class LabelListChangeEvent {
+        public enum EventType { Add, Remove };
+
+        public LabelListControl LabelListControl;
+        public EventType eventType;
+        public LabelItem label;
+    }
+
     /// <summary>
     /// 一个可以自动折叠的标签菜单
     /// </summary>
     public class LabelListControl: ItemsControl {
 
+        // public delegate void OnLabelChanged(LabelItem item);
+        public RelayCommand<LabelListChangeEvent> OnAddLabel = null, OnRemoveLabel = null;
+
         //private int _collpse_distance = 22;
         //private List<int> _expanded_position = new List<int>();
         private Storyboard _collpse_story_board = new Storyboard();
@@ -205,8 +217,14 @@ namespace FileManager_UWP.Controls {
             Debug.WriteLine("Manipulation finish");
             _draging = false;
             ObservableCollection<LabelItem> itemsSource = ItemsSource as ObservableCollection<LabelItem>;
-            itemsSource.Remove((sender as Button).GetValue(LabelProperty) as LabelItem);
+            var toRemove = (sender as Button).GetValue(LabelProperty) as LabelItem;
+            itemsSource.Remove(toRemove);
             update();
+            OnRemoveLabel?.Execute(new LabelListChangeEvent {
+                label = toRemove,
+                LabelListControl = this,
+                eventType = LabelListChangeEvent.EventType.Remove
+            });
         }
 
         private void B_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e) {
@@ -255,10 +273,17 @@ namespace FileManager_UWP.Controls {
         private void TextBox_LostFocus(object sender, RoutedEventArgs e) {
             _adding_new_label = false;
             TextBox tb = sender as TextBox;
+            var NewLabel = new LabelItem(tb.Text);
             if (tb.Text.Count() != 0)
-                (ItemsSource as ObservableCollection<LabelItem>).Add(new LabelItem(tb.Text));
+                (ItemsSource as ObservableCollection<LabelItem>).Add(NewLabel);
             if (!_hovering)
                 LabelListCanvas_PointerExited(null, null);
+            // 调用回调函数
+            OnAddLabel?.Execute(new LabelListChangeEvent {
+                label = NewLabel,
+                LabelListControl = this,
+                eventType = LabelListChangeEvent.EventType.Add
+            });
         }
 
         private void TextBox_GotFocus(object sender, RoutedEventArgs e) {
diff --git a/FileManager_UWP/View/FileListView.xaml.cs b/FileManager_UWP/View/FileListView.xaml.cs
index f9e2515..49682a2 100644
--- a/FileManager_UWP/View/FileListView.xaml.cs
+++ b/FileManager_UWP/View/FileListView.xaml.cs
@@ -54,13 +54,16 @@ namespace FileManager_UWP.View {
 
                     LabelListControl labels = new LabelListControl();
                     labels.ItemsSource = displayFileItem.Labels;
-                    labels.Padding = new Windows.UI.Xaml.Thickness(0, -50, 0, 0);
+                    // labels.Padding = new Windows.UI.Xaml.Thickness(0, -50, 0, 0);
+                    labels.SetValue(LabelListControl.TagProperty, displayFileItem.Path);
+                    labels.OnRemoveLabel = vm.LabelRemoveCommand;
+                    labels.OnAddLabel = vm.LabelAddCommand;
+
 
                     sp.Children.Add(Icon);
                     sp.Children.Add(Name);
                     sp.Children.Add(labels);
                     MicroShitList.Items.Add(sp);
-
                 }
             }
         }
diff --git a/FileManager_UWP/ViewModel/FileListViewModel.cs b/FileManager_UWP/ViewModel/FileListViewModel.cs
index f9f9ef5..3497861 100644
--- a/FileManager_UWP/ViewModel/FileListViewModel.cs
+++ b/FileManager_UWP/ViewModel/FileListViewModel.cs
@@ -1,4 +1,5 @@
-using FileManager_UWP.Model;
+using FileManager_UWP.Controls;
+using FileManager_UWP.Model;
 using FileManager_UWP.Service;
 using GalaSoft.MvvmLight;
 using GalaSoft.MvvmLight.Command;
@@ -119,5 +120,27 @@ namespace FileManager_UWP.ViewModel {
                     // pvm.Path = i.Path;
                     pvm.ShowPreviewCommand.Execute(i.Path);
                 }));
+
+        private RelayCommand<LabelListChangeEvent> _labelRemoveCommand;
+        public RelayCommand<LabelListChangeEvent> LabelRemoveCommand =>
+            _labelRemoveCommand ?? (_labelRemoveCommand = 
+            new RelayCommand<LabelListChangeEvent>(
+                (LabelListChangeEvent e) => {
+                    string path = e.LabelListControl.GetValue(LabelListControl.TagProperty) as string;
+                    LabelItem label = e.label;
+                    Debug.WriteLine("remove " + path + " " + label.tag);
+                })
+            );
+
+        private RelayCommand<LabelListChangeEvent> _labelAddCommand;
+        public RelayCommand<LabelListChangeEvent> LabelAddCommand =>
+            _labelAddCommand ?? (_labelAddCommand =
+            new RelayCommand<LabelListChangeEvent>(
+                (LabelListChangeEvent e) => {
+                    string path = e.LabelListControl.GetValue(LabelListControl.TagProperty) as string;
+                    LabelItem label = e.label;
+                    Debug.WriteLine("add " + path + " " + label.tag);
+                })
+            );
     }
 }