![]() A VisualState contains a Setter or Storyboard that changes the appearance of the elements in the ControlTemplate. You specify the appearance of a control when it is in a certain state by using VisualState objects. This table lists the possible values of IsChecked, the corresponding states of the CheckBox, and the appearance of the CheckBox. The value of the IsChecked property determines the state of the CheckBox, and its state determines what appears in the box. The CheckBox control has 3 check states: Checked, Unchecked, and Indeterminate. Ī visual behavior specifies the appearance of a control when it is in a certain state. See TemplateBinding markup extension for more info. Starting with Windows 10, version 1809 ( SDK 17763), you can use x:Bind markup extensions in places you use TemplateBinding. TemplateBinding can only be used within a ControlTemplate definition in XAML. Note that the Opacity is set to 0 on the Path and the Ellipse so that by default, neither appear.Ī TemplateBinding is a special binding that links the value of a property in a control template to the value of some other exposed property on the templated control. The example specifies a Path to create an X that indicates that a user selected the CheckBox, and an Ellipse that indicates an indeterminate state. This XAML creates a ControlTemplate for a CheckBox that specifies that the content of the control is below the selection box. The combination of objects makes up the control's visual structure. The root element usually contains other FrameworkElement objects. A ControlTemplate must have only one FrameworkElement as its root element. When you create a ControlTemplate, you combine FrameworkElement objects to build a single control. Specify the visual structure of a control Here's how this CheckBox looks in the Unchecked, Checked, and Indeterminate states after we apply our template. We show the Extensible Application Markup Language (XAML) for the ControlTemplate in the next section. Here's a CheckBox using a ControlTemplate called CheckBoxTemplate1. To use a custom template with a control, assign the ControlTemplate to the Template property of the control. You specify these characteristics in the ControlTemplate of the CheckBox. For example, if you want the content of the check box to be below the selection box, and you want to use an X to indicate that a user selected the check box. You can change these characteristics by creating a ControlTemplate for the CheckBox. Here's a CheckBox using the default ControlTemplate shown in the Unchecked, Checked, and Indeterminate states. These characteristics represent the visual structure and visual behavior of the CheckBox. Important APIs: ControlTemplate class, Control.Template property Custom control template exampleīy default, a CheckBox control puts its content (the string or object next to the CheckBox) to the right of the selection box, and a check mark indicates that a user selected the CheckBox. Here, we show you how to create a ControlTemplate to customize the appearance of a CheckBox control. You can specify additional customizations by creating a template using the ControlTemplate class. ![]() But the changes that you can make by setting these properties are limited. Controls have many properties, such as Background, Foreground, and FontFamily, that you can set to specify different aspects of the control's appearance. You can customize a control's visual structure and visual behavior by creating a control template in the XAML framework.
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