WPF气泡样式弹窗效果

页面设计需求，做了一个气泡形状的弹出框，效果如下：



设计思路如下：

1. 使用Path绘制气泡的尖尖，将这个放到顶层；

2. 在用border绘制长方形框，将这个放到底层，并且设置Margin值，使得Path图层和border看起来衔接在一起。

代码如下：

1 <Window x:Class="BubblePanelTest.MainWindow"
2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4         Title="MainWindow" Height="350" Width="525">
5     <Window.Resources>
6         <Style TargetType="Label" x:Key="TopBubblePanel">
7             <Setter Property="Template">
8                 <Setter.Value>
9                     <ControlTemplate TargetType="{x:Type Label}">
10                         <Grid>
11                             <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" VerticalAlignment="Top"  Background="Yellow" HorizontalAlignment="Left" Margin="0,8.5,0,0" Padding="5">
12                                 <ContentPresenter />
13                             </Border>
14                             <Canvas Width="10" Height="10" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10,0,0,0" Background="Transparent">
15                                 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
16                                     <Path.Data>
17                                         <PathGeometry Figures="M 0,10
18                                   L 0,10,5,0
19                                   L 5,0,10,10
20                                   "/>
21                                     </Path.Data>
22                                 </Path>
23                             </Canvas>
24                         </Grid>
25                     </ControlTemplate>
26                 </Setter.Value>
27             </Setter>
28         </Style>
29         <Style TargetType="Label" x:Key="BottomBubblePanel">
30             <Setter Property="Template">
31                 <Setter.Value>
32                     <ControlTemplate TargetType="{x:Type Label}">
33                         <Grid>
34                             <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" VerticalAlignment="Bottom" Margin="0,0,0,8.5" Background="Yellow" HorizontalAlignment="Left" Padding="5">
35                                 <ContentPresenter />
36                             </Border>
37                             <Canvas Width="10" Height="10" HorizontalAlignment="Left" VerticalAlignment="Bottom" Margin="10,0,0,0" Background="Transparent">
38                                 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
39                                     <Path.Data>
40                                         <PathGeometry Figures="M 0,0
41                                   L 0,0,5,10
42                                   L 5,10,10,0
43                                   "/>
44                                     </Path.Data>
45                                 </Path>
46                             </Canvas>
47                         </Grid>
48                     </ControlTemplate>
49                 </Setter.Value>
50             </Setter>
51         </Style>
52         <Style TargetType="Label" x:Key="LeftBubblePanel">
53             <Setter Property="Template">
54                 <Setter.Value>
55                     <ControlTemplate TargetType="{x:Type Label}">
56                         <Grid>
57                             <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" VerticalAlignment="Top" Margin="8.5,0,0,0" Background="Yellow" HorizontalAlignment="Left" Padding="5">
58                                 <ContentPresenter />
59                             </Border>
60                             <Canvas Width="10" Height="10" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,10,0,0" Background="Transparent">
61                                 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
62                                     <Path.Data>
63                                         <PathGeometry Figures="M 10,0
64                                   L 10,0,0,5
65                                   L 0,5,10,10
66                                   "/>
67                                     </Path.Data>
68                                 </Path>
69                             </Canvas>
70                         </Grid>
71                     </ControlTemplate>
72                 </Setter.Value>
73             </Setter>
74         </Style>
75         <Style TargetType="Label" x:Key="RightBubblePanel">
76             <Setter Property="Template">
77                 <Setter.Value>
78                     <ControlTemplate TargetType="{x:Type Label}">
79                         <Grid HorizontalAlignment="Left">
80                             <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,0,8.5,0" Background="Yellow" Padding="5">
81                                 <ContentPresenter />
82                             </Border>
83                             <Canvas Width="10" Height="10" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,10,0,0" Background="Transparent">
84                                 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
85                                     <Path.Data>
86                                         <PathGeometry Figures="M 0,0
87                                   L 0,0,10,5
88                                   L 10,5,0,10
89                                   "/>
90                                     </Path.Data>
91                                 </Path>
92                             </Canvas>
93                         </Grid>
94                     </ControlTemplate>
95                 </Setter.Value>
96             </Setter>
97         </Style>
98     </Window.Resources>
99     <StackPanel>
100         <Label Style="{StaticResource TopBubblePanel}" Tag="Top" Margin="2">
101             <StackPanel>
102                 <StackPanel Orientation="Horizontal">
103                     <TextBlock Text="abc" />
104                     <TextBox Width="80"/>
105                 </StackPanel>
106             </StackPanel>
107         </Label>
108         <Label Style="{StaticResource BottomBubblePanel}" Tag="Top" Margin="2">
109             <StackPanel>
110                 <StackPanel Orientation="Horizontal">
111                     <TextBlock Text="abc" />
112                     <TextBox Width="80"/>
113                 </StackPanel>
114             </StackPanel>
115         </Label>
116         <Label Style="{StaticResource LeftBubblePanel}" Tag="Top" Margin="2">
117             <StackPanel>
118                 <StackPanel Orientation="Horizontal">
119                     <TextBlock Text="abc" />
120                     <TextBox Width="80"/>
121                 </StackPanel>
122             </StackPanel>
123         </Label>
124         <Label Style="{StaticResource RightBubblePanel}" Tag="Top" Margin="2">
125             <StackPanel>
126                 <StackPanel Orientation="Horizontal">
127                     <TextBlock Text="abc" />
128                     <TextBox Width="80"/>
129                 </StackPanel>
130             </StackPanel>
131         </Label>
132         <StackPanel Orientation="Horizontal" Margin="0,30,0,0">
133             <Button Name="btnTestPopup1" Width="100" Height="30" Content="Bottom" Click="btnTestPopup1_Click" />
134             <Button Name="btnTestPopup2" Width="100" Height="30" Content="Top" Click="btnTestPopup2_Click" />
135             <Button Name="btnTestPopup3" Width="100" Height="30" Content="Right" Click="btnTestPopup3_Click" />
136             <Button Name="btnTestPopup4" Width="100" Height="30" Content="Left" Click="btnTestPopup4_Click" />
137         </StackPanel>
138         <Popup Name="pop1" AllowsTransparency="True" StaysOpen="False" PopupAnimation="Slide" PlacementTarget="{Binding ElementName=btnTestPopup1}" Placement="Bottom" >
139             <Label Style="{StaticResource TopBubblePanel}" Tag="Top">
140                 <StackPanel>
141                     <StackPanel Orientation="Horizontal">
142                         <TextBlock Text="abc" />
143                         <TextBox Width="80" Name="txtTest1" />
144                     </StackPanel>
145                     <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
146                         <Button Content="确定" Click="btnOK1_Click" Width="50" Height="25" Margin="5" />
147                         <Button Content="取消" Click="btnCancel1_Click"  Width="50" Height="25" Margin="5"/>
148                     </StackPanel>
149                 </StackPanel>
150             </Label>
151         </Popup>
152         <Popup Name="pop2" AllowsTransparency="True" StaysOpen="False" PopupAnimation="Fade"  PlacementTarget="{Binding ElementName=btnTestPopup2}" Placement="Top" >
153             <Label Style="{StaticResource BottomBubblePanel}" Tag="Top">
154                 <StackPanel>
155                     <StackPanel Orientation="Horizontal">
156                         <TextBlock Text="abc" />
157                         <TextBox Width="80" Name="txtTest2" />
158                     </StackPanel>
159                     <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
160                         <Button Content="确定" Click="btnOK2_Click"  Width="50" Height="25" Margin="5"/>
161                         <Button Content="取消" Click="btnCancel2_Click"  Width="50" Height="25" Margin="5"/>
162                     </StackPanel>
163                 </StackPanel>
164             </Label>
165         </Popup>
166         <Popup Name="pop3" AllowsTransparency="True" StaysOpen="False" PopupAnimation="Scroll"  PlacementTarget="{Binding ElementName=btnTestPopup3}" Placement="Right" >
167             <Label Style="{StaticResource LeftBubblePanel}" Tag="Top">
168                 <StackPanel>
169                     <StackPanel Orientation="Horizontal">
170                         <TextBlock Text="abc" />
171                         <TextBox Width="80" Name="txtTest3" />
172                     </StackPanel>
173                     <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
174                         <Button Content="确定" Click="btnOK2_Click"  Width="50" Height="25" Margin="5"/>
175                         <Button Content="取消" Click="btnCancel3_Click"  Width="50" Height="25" Margin="5"/>
176                     </StackPanel>
177                 </StackPanel>
178             </Label>
179         </Popup>
180         <Popup Name="pop4" AllowsTransparency="True" StaysOpen="False" PopupAnimation="None" PlacementTarget="{Binding ElementName=btnTestPopup4}" Placement="Left" >
181             <Label Style="{StaticResource RightBubblePanel}" Tag="Top">
182                 <StackPanel>
183                     <StackPanel Orientation="Horizontal">
184                         <TextBlock Text="abc" />
185                         <TextBox Width="80" Name="txtTest4" />
186                     </StackPanel>
187                     <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
188                         <Button Content="确定" Click="btnOK4_Click"  Width="50" Height="25" Margin="5"/>
189                         <Button Content="取消" Click="btnCancel4_Click"  Width="50" Height="25" Margin="5"/>
190                     </StackPanel>
191                 </StackPanel>
192             </Label>
193         </Popup>
194     </StackPanel>
195 </Window>

后台代码，很简单，就是控制pupup显示或隐藏

1 private void btnTestPopup1_Click(object sender, RoutedEventArgs e)
2         {
3             pop1.IsOpen = true;
4         }
5         private void btnOK1_Click(object sender, RoutedEventArgs e)
6         {
7             pop1.IsOpen = false;
8         }
9         private void btnCancel1_Click(object sender, RoutedEventArgs e)
10         {
11             pop1.IsOpen = false;
12         }
13
14         private void btnTestPopup2_Click(object sender, RoutedEventArgs e)
15         {
16             pop2.IsOpen = true;
17         }
18         private void btnOK2_Click(object sender, RoutedEventArgs e)
19         {
20             pop2.IsOpen = false;
21         }
22         private void btnCancel2_Click(object sender, RoutedEventArgs e)
23         {
24             pop2.IsOpen = false;
25         }
26
27         private void btnTestPopup3_Click(object sender, RoutedEventArgs e)
28         {
29             pop3.IsOpen = true;
30         }
31         private void btnOK3_Click(object sender, RoutedEventArgs e)
32         {
33             pop3.IsOpen = false;
34         }
35         private void btnCancel3_Click(object sender, RoutedEventArgs e)
36         {
37             pop3.IsOpen = false;
38         }
39
40         private void btnTestPopup4_Click(object sender, RoutedEventArgs e)
41         {
42             pop4.IsOpen = true;
43         }
44         private void btnOK4_Click(object sender, RoutedEventArgs e)
45         {
46             pop4.IsOpen = false;
47         }
48         private void btnCancel4_Click(object sender, RoutedEventArgs e)
49         {
50             pop4.IsOpen = false;
51         }

如有问题，还忘大家拍砖。