WPF多个按钮点击切换样式
本文主要讲述WPF中多个按钮,点击状态为一个样式,未点击状态为一个样式,两种样式通过点击这个动作会发生改变,点击另一个按钮,当前已点击的按钮样式也改变的情况。
不复杂样式的多个按钮
主要做法就是将按钮使用radiobutton来代替,然后各个radiobutton的GroupName取名为同一个,如本例中就是取名为“button1”。
<RadioButton Foreground="White" Background="#586c88" HorizontalContentAlignment = "Center" VerticalContentAlignment = "Center" Padding="0" GroupName="button1">
<RadioButton.Template>
<ControlTemplate TargetType="RadioButton">
<Border Name="bd" BorderThickness="4" CornerRadius="4" BorderBrush="#586c88" Background="#586c88">
<ContentPresenter Content="{Binding Position}" HorizontalAlignment="Center"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter TargetName="bd" Property="Background" Value="#21b4de" />
<Setter TargetName="bd" Property="BorderBrush" Value="#21b4de" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</RadioButton.Template>
</RadioButton>
上图A1代表点击的,B1代表没点击的,其他都是其他样式,使用触发器,当radiobutton的ischeck属性改变的时候更改他的颜色
复杂样式的多个按钮
上图只是改个颜色那么上述的代码已经足够实现了,但是,假如这个按钮是拥有UI设计的,那么就点击状态有一个图片,未点击状态为另一个图片,然后文字或者字体颜色也可能发生变化,比如当背景颜色变为纯黑的时候,字体为黑色就看不到了,就要改为白色,当背景颜色变为纯白的时候,字体为白色就看不到了,就要改回黑色。那么这种时候就要更改Button的Background了,本例决定使用模板选择器来更改样式。
前端xaml代码
<Button x:Name="btnCaptureChipImage" Height="34" Padding="0" VerticalAlignment="Center" IsEnabled="{Binding ChipAnalysisButtonEnabled}" Click="btnCaptureChipImage_Click" BorderThickness="0" Cursor="Hand">
<ContentPresenter Content="{Binding ChipBtn}">
<ContentPresenter.ContentTemplateSelector>
<local:ChipBtnTemplateSelector>
<local:ChipBtnTemplateSelector.WhiteTemplate>
<DataTemplate>
<Grid Height="34" MinWidth="97">
<Grid.Background>
<ImageBrush ImageSource="/Images/BlueButton.png" Stretch="Fill" TileMode="None" />
</Grid.Background>
<StackPanel Orientation="Horizontal">
<Image Source="/Images/Camera_White.png" Width="16" Height="16" Margin="10,0,0,0"/>
<TextBlock Text="{DynamicResource Res_C_ExecWork}" TextWrapping="Wrap" FontSize="16" Foreground="White" VerticalAlignment="Center" Margin="5,0,5,0"/>
</StackPanel>
</Grid>
</DataTemplate>
</local:ChipBtnTemplateSelector.WhiteTemplate>
<local:ChipBtnTemplateSelector.BlackTemplate>
<DataTemplate>
<Grid Height="34" MinWidth="97">
<Grid.Background>
<ImageBrush ImageSource="/Images/WhiteButton.png" Stretch="Fill" TileMode="None" />
</Grid.Background>
<StackPanel Orientation="Horizontal">
<Image Source="/Images/Camera_Black.png" Width="16" Height="16" Margin="10,0,0,0"/>
<TextBlock Text="{DynamicResource Res_C_ExecWork}" TextWrapping="Wrap" FontSize="16" Foreground="Black" VerticalAlignment="Center" Margin="5,0,5,0"/>
</StackPanel>
</Grid>
</DataTemplate>
</local:ChipBtnTemplateSelector.BlackTemplate>
</local:ChipBtnTemplateSelector>
</ContentPresenter.ContentTemplateSelector>
</ContentPresenter>
</Button>
后台 模板选择器代码
/// <summary>
/// 版型设计页面四个按钮模板选择器
/// </summary>
public class ChipBtnTemplateSelector : DataTemplateSelector
{
public DataTemplate WhiteTemplate { get; set; }
public DataTemplate BlackTemplate { get; set; }
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item == null)
return null;
Button button = container.GetParentObject() as Button;
ChipBtn chipBtn = (ChipBtn)item;
if(button.Name == "btnCaptureChipImage")
{
if (chipBtn == ChipBtn.Camera)
return WhiteTemplate;
else
return BlackTemplate;
}
else if(button.Name == "btnExecChipAnalysis")
{
if (chipBtn == ChipBtn.Analysis)
return WhiteTemplate;
else
return BlackTemplate;
}
else if(button.Name == "btnExecAllChipAnalysis")
{
if (chipBtn == ChipBtn.AllAnalysis)
return WhiteTemplate;
else
return BlackTemplate;
}
else if(button.Name == "btnImportChipImage")
{
if (chipBtn == ChipBtn.Import)
return WhiteTemplate;
else
return BlackTemplate;
}
return null;
}
}
//按钮Click事件更改ChipBtn枚举值。
private void btnCaptureChipImage_Click(object sender, RoutedEventArgs e)
{
ViewModel.ChipBtn = ChipBtn.Camera;
}
上图左一按钮代表点击的,其他三个代表没点击的,使用模板选择器每次点击就更改VM中定义的ChipBtn,然后Button的ContentPresenter的Content binding的就是ChipBtn他一改变就进入了模板选择器的SelectTemplate方法,在该方法中通过查找当前按钮的Name与点击时改变的ChipBtn做匹配,匹配正确就A模板,匹配不正确就B模板。这个方法一共进四次(有几个按钮就进几次,有四个按钮,每个按钮进一次,因为每个按钮都绑定了ChipBtn)。
更加复杂的样式的多个按钮
多个按钮选中一个变色,选中其他的,这个变回,那个选中的变色,同时按钮是会变的,按钮中的左边图片跟文字颜色会随着后台另一个属性的变化而变化。那就不能用上面所说的模板选择器了。因为就算同是白的 也有不同的图片不同的文字颜色。那么如果还用模板选择器,那么每个按钮就要定义2*不同图片种类数(本次例子中为5个)就是10个了,上面所说的模板选择器已经很冗余了,这个更冗余了,就排除了,选择了下列方法,用了三个IValueConverter转换器改他的背景,按钮内左边的图片与文字颜色。
前端xaml代码
<Button x:Name="button1" Click="button1_Click" Height="34" Margin="10,0,0,0" Padding="0" Cursor="Hand">
<Button.Background>
<ImageBrush Stretch="Fill" TileMode="None">
<ImageBrush.ImageSource>
<MultiBinding Converter="{StaticResource ButtonBackgroundChanged}" FallbackValue="/Images/WhiteButton.png">
<Binding Path="AnalysisBtn"/>
<Binding Path="CurrentProject.TabItemName[0]"/>
</MultiBinding>
</ImageBrush.ImageSource>
</ImageBrush>
</Button.Background>
<StackPanel Orientation="Horizontal" MinWidth="97">
<Image Width="16" Height="16" Margin="5,0,0,0">
<Image.Source>
<MultiBinding Converter="{StaticResource ButtonImageChanged}" FallbackValue="/Images/FAM_Black.png">
<Binding Path="AnalysisBtn"/>
<Binding Path="CurrentProject.TabItemName[0]"/>
<Binding ElementName="button1" Path="Name"/>
</MultiBinding>
</Image.Source>
</Image>
<TextBlock Text="{Binding CurrentProject.TabItemName[0],FallbackValue='FAM Scatter'}" TextWrapping="Wrap" FontSize="16" Margin="5,0,5,0" VerticalAlignment="Center">
<TextBlock.Foreground>
<MultiBinding Converter="{StaticResource TextForegroundChanged}" FallbackValue="Black">
<Binding Path="AnalysisBtn"/>
<Binding Path="CurrentProject.TabItemName[0]"/>
</MultiBinding>
</TextBlock.Foreground>
</TextBlock>
</StackPanel>
</Button>
xmal代码中声明IValueConverter转换器
//声明三个转换器
<local:ButtonBackgroundChanged x:Key="ButtonBackgroundChanged"/>
<local:ButtonImageChanged x:Key="ButtonImageChanged"/>
<local:TextForegroundChanged x:Key="TextForegroundChanged"/>
后台IValueConverter转换器代码
//定义三个转换器
public class ButtonBackgroundChanged : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
try
{
if (values[1] == DependencyProperty.UnsetValue)
return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/当前项目名称;component/Images/WhiteButton.png"));
AnalysisBtn analysisBtn = (AnalysisBtn)values[0];
string geneName = values[1].ToString().Substring(0, 3);
if (geneName == analysisBtn.ToString())
return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/当前项目名称;component/Images/BlueButton.png"));
else
return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/当前项目名称;component/Images/WhiteButton.png"));
}
catch(Exception)
{
throw;
}
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
return null;
}
}
public class ButtonImageChanged : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
try
{
if (values[1] == DependencyProperty.UnsetValue)
{
if(values[2].ToString() == "button1")
return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/当前项目名称;component/Images/FAM_Black.png"));
else
return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/当前项目名称;component/Images/VIC_Black.png"));
}
AnalysisBtn analysisBtn = (AnalysisBtn)values[0];
string geneName = values[1].ToString().Substring(0, 3);
if (geneName == analysisBtn.ToString())
return new System.Windows.Media.Imaging.BitmapImage(new Uri(string.Format("pack://application:,,,/当前项目名称;component/Images/{0}_White.png",geneName)));
else
return new System.Windows.Media.Imaging.BitmapImage(new Uri(string.Format("pack://application:,,,/当前项目名称;component/Images/{0}_Black.png", geneName)));
}
catch (Exception)
{
throw;
}
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
return null;
}
}
public class TextForegroundChanged : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
try
{
if (values[1] == DependencyProperty.UnsetValue)
return new SolidColorBrush(Colors.Black);
AnalysisBtn analysisBtn = (AnalysisBtn)values[0];
string geneName = values[1].ToString().Substring(0, 3);
if (geneName == analysisBtn.ToString())
return new SolidColorBrush(Colors.White);
else
return new SolidColorBrush(Colors.Black);
}
catch (Exception)
{
throw;
}
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
return null;
}
}
为什么说这个图很复杂呢,明明跟上面的例子一模一样,主要是这个第二第三个按钮,他是动态的,不仅文字动态,他左边那个小图标“F”样子的那个也要变,而且点击了之后背景变了之后,这个小图标也要变,因为他是黑底的,要改为白底。