轮播图组件代码:
[Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)]
[TemplatePart(Name = "Part_Grid",Type= typeof(Grid))]
[TemplatePart(Name = "Part_OldContentControl", Type = typeof(ContentControl))]
[TemplatePart(Name = "Part_NewContentControl", Type = typeof(ContentControl))]
[TemplatePart(Name = "Part_PreButton", Type = typeof(Button))]
[TemplatePart(Name = "Part_NextButton", Type = typeof(Button))]
[TemplatePart(Name = "Part_StackPanel", Type = typeof(StackPanel))]
public class Carousel:ItemsControl
{
#region Private Fields
private const string GridTemplateName = "Part_Grid";
private const string OldContentControlTemplateName = "Part_OldContentControl";
private const string NewContentControlTemplateName = "Part_NewContentControl";
private const string PreButtonTemplateName = "Part_PreButton";
private const string NextButtonTemplateName = "Part_NextButton";
private const string StackPanelTemplateName = "Part_StackPanel";
private DispatcherTimer _timer;
private Grid _grid;
private ContentControl _oldContentControl;
private ContentControl _newContentControl;
private Button _prevButton;
private Button _nextButton;
private StackPanel _stackPanel;
private int _pageIndex = -1;
private bool _templateLoaded;
#endregion
#region Public Properties
public TimeSpan Interval
{
get => (TimeSpan)GetValue(IntervalProperty);
set => SetValue(IntervalProperty, value);
}
public static readonly DependencyProperty IntervalProperty =
DependencyProperty.Register(nameof(Interval), typeof(TimeSpan), typeof(Carousel), new PropertyMetadata(TimeSpan.FromSeconds(3)));
public bool AutoPlay
{
get => (bool)GetValue(AutoPlayProperty);
set => SetValue(AutoPlayProperty, value);
}
public static readonly DependencyProperty AutoPlayProperty =
DependencyProperty.Register(nameof(AutoPlay), typeof(bool), typeof(Carousel), new PropertyMetadata(false,
(o, e) =>
{
if (o is Carousel d)
{
d.TimerSwitch((bool)e.NewValue);
}
}));
public Style PageButtonStyle
{
get => (Style)GetValue(PageButtonStyleProperty);
set => SetValue(PageButtonStyleProperty, value);
}
public static readonly DependencyProperty PageButtonStyleProperty =
DependencyProperty.Register(nameof(PageButtonStyle), typeof(Style), typeof(Carousel), new PropertyMetadata(default));
public int PageIndex
{
get => _pageIndex;
set
{
if(Items.Count==0)
return;
if(_pageIndex==value)
return;
if (value < 0)
_pageIndex = Items.Count - 1;
else if (value >= Items.Count)
_pageIndex = 0;
else
_pageIndex = value;
SwitchPageButton(_pageIndex);
}
}
#endregion
#region Events
public event EventHandler PreButtonClick;
public event EventHandler NextButtonClick;
public event EventHandler PageButtonClick;
#endregion
#region Constructor
static Carousel()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(Carousel),new FrameworkPropertyMetadata(typeof(Carousel)));
}
public Carousel()
{
this.Loaded += (d, e) => SwitchPageButton(-1);
}
#endregion
#region Override Methods
public override void OnApplyTemplate()
{
_grid?.RemoveHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonBaseClick));
_prevButton?.RemoveHandler(ButtonBase.ClickEvent,new RoutedEventHandler(ButtonPreClick));
_nextButton?.RemoveHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonNextClick));
base.OnApplyTemplate();
_templateLoaded = false;
_grid = GetTemplateChild(GridTemplateName) as Grid;
_prevButton = GetTemplateChild(PreButtonTemplateName) as Button;
_nextButton=GetTemplateChild(NextButtonTemplateName) as Button;
_stackPanel=GetTemplateChild(StackPanelTemplateName) as StackPanel;
_oldContentControl = GetTemplateChild(OldContentControlTemplateName) as ContentControl;
_newContentControl=GetTemplateChild(NewContentControlTemplateName) as ContentControl;
_prevButton?.AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonPreClick));
_nextButton?.AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonNextClick));
_grid?.AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonBaseClick));
_templateLoaded = true;
}
#endregion
#region Private Methods
private void TimerSwitch(bool isAutoPlay)
{
if (_timer != null)
{
_timer.Tick -= _timer_Tick;
_timer.Stop();
_timer = null;
}
if(!isAutoPlay)
return;
_timer = new DispatcherTimer(){ Interval = Interval};
_timer.Tick += _timer_Tick; ;
_timer.Start();
}
private void _timer_Tick(object sender, EventArgs e)
{
if(_templateLoaded)
PageIndex++;
}
private void SwitchPageButton(int index)
{
_stackPanel.Children.Clear();
if(Items.Count==0)
return;
for (int i = 0; i < Items.Count; i++)
{
_stackPanel.Children.Add(new RadioButton()
{
Style = PageButtonStyle
});
}
if (index<0)
index = Items.Count-1;
if (index > Items.Count - 1)
index = 0;
if (_stackPanel.Children[index] is RadioButton btn)
{
btn.IsChecked = true;
btn.RaiseEvent(new RoutedEventArgs(ButtonBase.ClickEvent, btn));
SwitchPage();
}
}
private void SwitchPage()
{
if(Items.Count==0)
return;
if (Items[PageIndex] is FrameworkElement currentElement)
{
var oldContent = _newContentControl.Content;
_newContentControl.Content = null;
currentElement.Loaded += async (s, e) =>
{
var element = s as FrameworkElement;
await element.SlideAndFadeInAsync(AnimationSlideInDirection.Right, true,1.0f);
};
currentElement.Unloaded += async (s, e) =>
{
var element = s as FrameworkElement;
await element.SlideAndFadeOutAsync(AnimationSlideInDirection.Left,1.0f);
};
_oldContentControl.Content = oldContent;
Task.Delay((int)(1 * 1000)).ContinueWith((t) =>
{
Application.Current.Dispatcher.Invoke(() => _oldContentControl.Content = null);
});
_newContentControl.Content = currentElement;
}
}
private void ButtonBaseClick(object sender, RoutedEventArgs e)
{
var _selectedButton = e.OriginalSource as RadioButton;
var index = _stackPanel.Children.IndexOf(_selectedButton);
if (index != -1)
{
PageIndex = index;
}
PageButtonClick?.Invoke(sender, e);
}
private void ButtonPreClick(object sender, RoutedEventArgs e)
{
PageIndex--;
PreButtonClick?.Invoke(sender,e);
}
private void ButtonNextClick(object sender, RoutedEventArgs e)
{
PageIndex++;
NextButtonClick?.Invoke(sender,e);
}
#endregion
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
style
<Style TargetType="{x:Type controls1:Carousel}">
<Setter Property="Background" Value="Transparent" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type controls1:Carousel}">
<Grid
x:Name="Part_Grid"
Background="{TemplateBinding Background}"
ClipToBounds="True">
<ContentControl x:Name="Part_OldContentControl" />
<ContentControl x:Name="Part_NewContentControl" />
<Button
x:Name="Part_PreButton"
Width="60"
Height="100"
Margin="15,0,0,0"
Padding="15"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Background="DarkGray"
BorderThickness="0"
Opacity="0.7"
Visibility="Hidden">
<Button.Content>
<Path
Data="M 15,50 30,18 33,20 19,50 33,80 30,82 z"
Fill="White"
Stretch="Uniform" />
</Button.Content>
</Button>
<Button
x:Name="Part_NextButton"
Width="60"
Height="100"
Margin="0,0,15,0"
Padding="15"
HorizontalAlignment="Right"
VerticalAlignment="Center"
Background="DarkGray"
BorderThickness="0"
Opacity="0.7"
Visibility="Hidden">
<Button.Content>
<Path
Data="M 45,50 30,18 27,20 41,50 27,80 30,82 z"
Fill="White"
Stretch="Uniform" />
</Button.Content>
</Button>
<StackPanel
x:Name="Part_StackPanel"
Margin="0,0,0,10"
HorizontalAlignment="Center"
VerticalAlignment="Bottom"
Orientation="Horizontal" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="Part_PreButton" Property="Visibility" Value="Visible" />
<Setter TargetName="Part_NextButton" Property="Visibility" Value="Visible" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
使用
Border Grid.Row="0">
<controls:Carousel
x:Name="myCarousel"
AutoPlay="True"
NextButtonClick="MyCarousel_OnNextButtonClick"
PreButtonClick="MyCarousel_OnPreButtonClick">
<controls:Carousel.Items>
<Image Source="/AutoPOS;component/Asset/Images/1.jpg" Stretch="Fill" />
<Image Source="/AutoPOS;component/Asset/Images/2.jpeg" Stretch="Fill" />
<Image Source="/AutoPOS;component/Asset/Images/3.png" Stretch="Fill" />
<MediaElement
LoadedBehavior="Play"
MediaEnded="MediaElement_OnMediaEnded"
MediaOpened="MediaElement_OnMediaOpened"
Source="./Asset/Vedio/单依纯-永不失联的爱.mkv"
Stretch="Fill" />
</controls:Carousel.Items>
</controls:Carousel>
</Border>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
后台代码:
public partial class HomeView : UserControl
{
public HomeView()
{
InitializeComponent();
}
private void MediaElement_OnMediaOpened(object sender, RoutedEventArgs e)
{
myCarousel.AutoPlay=false;
}
private void MediaElement_OnMediaEnded(object sender, RoutedEventArgs e)
{
myCarousel.AutoPlay=true;
}
private void MyCarousel_OnPreButtonClick(object sender, EventArgs e)
{
myCarousel.AutoPlay = true;
}
private void MyCarousel_OnNextButtonClick(object sender, EventArgs e)
{
myCarousel.AutoPlay = true;
}
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
效果图:
注意的事项:
视频资源请指定内容,较新复制选项
可自实现sizechanged,visiblechanged实现变化逻辑
timer请先解除事件绑定和停止计时器,再置为null
carousel组件留出了许多接口,比如在播放视频时希望视频播放完成再去自动播放轮播图。可以注册事件处理。还留出相应的事件如下
public event EventHandler PreButtonClick;
public event EventHandler NextButtonClick;
public event EventHandler PageButtonClick;
1
2
3
也可以使用mvvm绑定到items,autoplay等属性
————————————————
版权声明:本文为CSDN博主「pw8992134」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/pw8992134/article/details/129622176