From a794c2a2c07d2411f07667878c9f151ded0fa060 Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Wed, 13 May 2020 23:52:45 +0800
Subject: [PATCH] now you can use ItemsSource on Carousel
---
.../UserControl/Controls/CarouselDemoCtl.xaml | 2 +-
.../Controls/{Other => Carousel}/Carousel.cs | 177 ++++++++++++++++--
.../Controls/Carousel/CarouselItem.cs | 9 +
.../Controls/Cover/CoverView/CoverView.cs | 12 +-
.../HandyControl_Shared.projitems | 3 +-
.../Themes/Styles/Carousel.xaml | 90 ++++++++-
6 files changed, 259 insertions(+), 34 deletions(-)
rename src/Shared/HandyControl_Shared/Controls/{Other => Carousel}/Carousel.cs (65%)
create mode 100644 src/Shared/HandyControl_Shared/Controls/Carousel/CarouselItem.cs
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/CarouselDemoCtl.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/CarouselDemoCtl.xaml
index 89bbeefc..889109ad 100644
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/CarouselDemoCtl.xaml
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/CarouselDemoCtl.xaml
@@ -9,7 +9,7 @@
-
+
diff --git a/src/Shared/HandyControl_Shared/Controls/Other/Carousel.cs b/src/Shared/HandyControl_Shared/Controls/Carousel/Carousel.cs
similarity index 65%
rename from src/Shared/HandyControl_Shared/Controls/Other/Carousel.cs
rename to src/Shared/HandyControl_Shared/Controls/Carousel/Carousel.cs
index 47ac493a..6ff7f180 100644
--- a/src/Shared/HandyControl_Shared/Controls/Other/Carousel.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Carousel/Carousel.cs
@@ -1,4 +1,5 @@
using System;
+using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
@@ -21,13 +22,11 @@ namespace HandyControl.Controls
[DefaultProperty("Items")]
[ContentProperty("Items")]
[TemplatePart(Name = ElementPanelPage, Type = typeof(Panel))]
- [TemplatePart(Name = ElementItemsControl, Type = typeof(ItemsPresenter))]
- public class Carousel : ListBox, IDisposable
+ public class Carousel : SimpleItemsControl, IDisposable
{
#region Constants
private const string ElementPanelPage = "PART_PanelPage";
- private const string ElementItemsControl = "PART_ItemsControl";
#endregion Constants
@@ -39,8 +38,6 @@ namespace HandyControl.Controls
private bool _appliedTemplate;
- private ItemsPresenter _itemsControl;
-
private int _pageIndex = -1;
private RadioButton _selectedButton;
@@ -49,6 +46,12 @@ namespace HandyControl.Controls
private readonly List _widthList = new List();
+ private readonly Dictionary _entryDic = new Dictionary();
+
+ private bool _isRefresh;
+
+ private IEnumerable _itemsSourceInternal;
+
#endregion Data
public override void OnApplyTemplate()
@@ -59,7 +62,6 @@ namespace HandyControl.Controls
base.OnApplyTemplate();
- _itemsControl = GetTemplateChild(ElementItemsControl) as ItemsPresenter;
_panelPage = GetTemplateChild(ElementPanelPage) as Panel;
if (!CheckNull()) return;
@@ -75,7 +77,7 @@ namespace HandyControl.Controls
UpdatePageButtons(_pageIndex);
}
- private bool CheckNull() => !(_itemsControl == null || _panelPage == null);
+ private bool CheckNull() => _panelPage != null;
public static readonly DependencyProperty AutoRunProperty = DependencyProperty.Register(
"AutoRun", typeof(bool), typeof(Carousel), new PropertyMetadata(ValueBoxes.FalseBox, (o, args) =>
@@ -153,13 +155,6 @@ namespace HandyControl.Controls
}
}
- protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
- {
- base.OnItemsChanged(e);
-
- UpdatePageButtons();
- }
-
///
/// 是否自动跳转
///
@@ -239,14 +234,14 @@ namespace HandyControl.Controls
_widthList.Clear();
_widthList.Add(0);
var width = .0;
- foreach (FrameworkElement item in Items)
+ foreach (FrameworkElement item in ItemsHost.Children)
{
item.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
width += item.DesiredSize.Width;
_widthList.Add(width);
}
- _itemsControl.Width = _widthList.Last() + ExtendWidth;
+ ItemsHost.Width = _widthList.Last() + ExtendWidth;
_panelPage.Children.Clear();
for (var i = 0; i < count; i++)
{
@@ -278,14 +273,14 @@ namespace HandyControl.Controls
if (Items.Count == 0) return;
if (!IsCenter)
{
- _itemsControl.BeginAnimation(MarginProperty,
+ ItemsHost.BeginAnimation(MarginProperty,
AnimationHelper.CreateAnimation(new Thickness(-_widthList[PageIndex], 0, 0, 0)));
}
else
{
- var ctl = (FrameworkElement)Items[PageIndex];
+ var ctl = (FrameworkElement)ItemsHost.Children[PageIndex];
var ctlWidth = ctl.DesiredSize.Width;
- _itemsControl.BeginAnimation(MarginProperty,
+ ItemsHost.BeginAnimation(MarginProperty,
AnimationHelper.CreateAnimation(
new Thickness(-_widthList[PageIndex] + (ActualWidth - ctlWidth) / 2, 0, 0, 0)));
}
@@ -313,5 +308,149 @@ namespace HandyControl.Controls
private void ButtonPrev_OnClick(object sender, RoutedEventArgs e) => PageIndex--;
private void ButtonNext_OnClick(object sender, RoutedEventArgs e) => PageIndex++;
+
+ protected override DependencyObject GetContainerForItemOverride() => new CarouselItem();
+
+ protected override bool IsItemItsOwnContainerOverride(object item) => item is CarouselItem;
+
+ private void ClearItems()
+ {
+ ItemsHost?.Children.Clear();
+ _entryDic.Clear();
+ }
+
+ private void RemoveItem(object item)
+ {
+ if (_entryDic.TryGetValue(item, out var entry))
+ {
+ ItemsHost.Children.Remove(entry);
+ Items.Remove(item);
+ _entryDic.Remove(item);
+ }
+ }
+
+ protected override void Refresh()
+ {
+ if (ItemsHost == null) return;
+
+ _entryDic.Clear();
+ _isRefresh = true;
+
+ foreach (var item in Items)
+ {
+ AddItem(item);
+ }
+
+ _isRefresh = false;
+ }
+
+ private void AddItem(object item) => InsertItem(_entryDic.Count, item);
+
+ private void InsertItem(int index, object item)
+ {
+ if (ItemsHost == null)
+ {
+ Items.Insert(index, item);
+ _entryDic.Add(item, null);
+ }
+ else
+ {
+ DependencyObject container;
+ if (IsItemItsOwnContainerOverride(item))
+ {
+ container = item as DependencyObject;
+ }
+ else
+ {
+ container = GetContainerForItemOverride();
+ PrepareContainerForItemOverride(container, item);
+ }
+
+ if (container is CarouselItem element)
+ {
+ element.Style = ItemContainerStyle;
+ _entryDic[item] = element;
+ ItemsHost.Children.Insert(index, element);
+
+ if (IsLoaded && !_isRefresh && _itemsSourceInternal != null)
+ {
+ Items.Insert(index, item);
+ }
+ }
+ }
+ }
+
+ protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
+ {
+ if (_itemsSourceInternal != null)
+ {
+ if (_itemsSourceInternal is INotifyCollectionChanged s)
+ {
+ s.CollectionChanged -= InternalCollectionChanged;
+ }
+
+ Items.Clear();
+ ClearItems();
+ }
+ _itemsSourceInternal = newValue;
+ if (_itemsSourceInternal != null)
+ {
+ if (_itemsSourceInternal is INotifyCollectionChanged s)
+ {
+ s.CollectionChanged += InternalCollectionChanged;
+ }
+ foreach (var item in _itemsSourceInternal)
+ {
+ AddItem(item);
+ }
+ }
+ }
+
+ private void InternalCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+ {
+ if (ItemsHost == null) return;
+
+ if (e.Action == NotifyCollectionChangedAction.Reset)
+ {
+ if (_entryDic.Count == 0) return;
+ ClearItems();
+ Items.Clear();
+ return;
+ }
+
+ if (e.OldItems != null)
+ {
+ foreach (var item in e.OldItems)
+ {
+ RemoveItem(item);
+ }
+ }
+ if (e.NewItems != null)
+ {
+ var count = 0;
+ foreach (var item in e.NewItems)
+ {
+ var index = e.NewStartingIndex + count++;
+ InsertItem(index, item);
+ }
+ }
+ }
+
+ protected override void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
+ {
+ if (_itemsSourceInternal != null) return;
+
+ InternalCollectionChanged(sender, e);
+ }
+
+ protected override void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e)
+ {
+
+ }
+
+ protected override void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e)
+ {
+
+ }
}
}
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Controls/Carousel/CarouselItem.cs b/src/Shared/HandyControl_Shared/Controls/Carousel/CarouselItem.cs
new file mode 100644
index 00000000..6b256f78
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Controls/Carousel/CarouselItem.cs
@@ -0,0 +1,9 @@
+using System.Windows.Controls;
+
+namespace HandyControl.Controls
+{
+ public class CarouselItem : ContentControl
+ {
+
+ }
+}
diff --git a/src/Shared/HandyControl_Shared/Controls/Cover/CoverView/CoverView.cs b/src/Shared/HandyControl_Shared/Controls/Cover/CoverView/CoverView.cs
index f1551909..714fcc59 100644
--- a/src/Shared/HandyControl_Shared/Controls/Cover/CoverView/CoverView.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Cover/CoverView/CoverView.cs
@@ -76,10 +76,7 @@ namespace HandyControl.Controls
{
base.OnApplyTemplate();
- if (_viewContent.Style == null)
- {
- _viewContent.Style = CoverViewContentStyle;
- }
+ _viewContent.Style ??= CoverViewContentStyle;
if (_selectedItem != null)
{
@@ -181,9 +178,7 @@ namespace HandyControl.Controls
}
_isRefresh = false;
-
GenerateIndex();
-
UpdateCoverViewContent(_viewContent.IsOpen);
}
@@ -338,10 +333,7 @@ namespace HandyControl.Controls
{
SetBindingForItem(element);
element.Style = ItemContainerStyle;
- if (element.Header == null)
- {
- element.Header = item;
- }
+ element.Header ??= item;
_entryDic[item] = element;
ItemsHost.Children.Insert(index, element);
diff --git a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
index b447dd89..076eb50b 100644
--- a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
+++ b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
@@ -26,6 +26,7 @@
+
@@ -143,7 +144,7 @@
-
+
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Carousel.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Carousel.xaml
index d79868a5..a10744b3 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Carousel.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Carousel.xaml
@@ -6,10 +6,94 @@
-
-
+
+
+
+
+
+
\ No newline at end of file