image - 悬停或单击时更改按钮图像

Question

如何在悬停和单击时更改按钮的背景图像？ Visual Studio 的 UI 似乎没有提供任何简单的方法来做到这一点。目前，默认行为似乎用纯色替换了我的图像，这看起来很棒。

到目前为止，我所拥有的只是 Button 基础:

    <Button Content="" Height="75" VerticalAlignment="Center" Width="75" HorizontalAlignment="Center" ClickMode="Press">
        <Button.Background>
            <ImageBrush ImageSource="../data/images/icons/skill_icon_0.png"/>
        </Button.Background>
    </Button>

我试图处理事件并手动设置它，但它不适用于按下/释放:

        Button skillButton = new Button();
        skillButton.Width = 75;
        skillButton.Height = 75;
        skillButton.ClickMode = ClickMode.Press;
        skillButton.Background = GetIconImage(iconIndex, 0);
        skillButton.PointerEntered += 
            (object sender, Windows.UI.Xaml.Input.PointerEventArgs e) => {
                skillButton.Background = GetIconImage(iconIndex, 1);
            };
        skillButton.PointerExited +=
            (object sender, Windows.UI.Xaml.Input.PointerEventArgs e) => {
                skillButton.Background = GetIconImage(iconIndex, 0);
            };
        skillButton.PointerPressed +=
            (object sender, Windows.UI.Xaml.Input.PointerEventArgs e) => {
                skillButton.Background = GetIconImage(iconIndex, 2);
            };
        skillButton.PointerReleased +=
            (object sender, Windows.UI.Xaml.Input.PointerEventArgs e) => {
                if (skillButton.FocusState == FocusState.Pointer)
                    skillButton.Background = GetIconImage(iconIndex, 1);
                else skillButton.Background = GetIconImage(iconIndex, 0);
            };

Answer 1

我最终编辑 ControlTemplate 只是为了创建和更改边框。但它也可以用来改变图像。

    <Button Width="75" Height="75" ClickMode="Press">
        <Button.Template>
            <ControlTemplate TargetType="Button">
                <Border x:Name="RootElement" CornerRadius="10" BorderThickness="2">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualStateGroup.Transitions>
                                <VisualTransition To="MouseOver" GeneratedDuration="0:0:0.1"/>
                                <VisualTransition To="Pressed" GeneratedDuration="0:0:0.1"/>
                            </VisualStateGroup.Transitions>
                            <VisualState x:Name="Normal" />
                            <VisualState x:Name="MouseOver">
                                <Storyboard>
                                    <ColorAnimation Storyboard.TargetName="BorderBrush" 
                                                    Storyboard.TargetProperty="Color" 
                                                    To="Yellow" />
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Pressed">
                                <Storyboard>
                                    <ColorAnimation Storyboard.TargetName="BorderBrush" 
                                                    Storyboard.TargetProperty="Color"
                                                    To="Black"/>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Border.BorderBrush>
                        <SolidColorBrush x:Name="BorderBrush" Color="White"/>
                    </Border.BorderBrush>
                    <Border.Background>
                        <ImageBrush ImageSource="ms-appx:/data/images/icons/skill_icon_0.png"/>
                    </Border.Background>
                </Border>
            </ControlTemplate>
        </Button.Template>
    </Button>