customizing-controltemplate

# WPF ControlTemplate Patterns

All controls inherited from the Control class can completely redefine their visual structure through ControlTemplate.

## 1. Core Concepts

### ControlTemplate vs Style

| Aspect | Style | ControlTemplate |
|--------|-------|-----------------|
| **Role** | Batch property value setting | Visual structure redefinition |
| **Scope** | Property changes only | Full appearance change possible |
| **Target** | All FrameworkElements | Control-derived classes only |

### ControlTemplate Components

- **TargetType**: Control type to which the template applies
- **TemplateBinding**: Connection to TemplatedParent properties
- **ContentPresenter**: Specifies where Content property is rendered
- **Triggers**: State-based visual changes

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## 2. Basic Implementation Patterns

### 2.1 Button ControlTemplate (XAML)

```xml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Style TargetType="{x:Type Button}" x:Key="RoundedButtonStyle">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <!-- Visual structure definition -->
                    <Border x:Name="PART_Border"
                            CornerRadius="10"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            Background="{TemplateBinding Background}"
                            Padding="{TemplateBinding Padding}">

                        <!-- Content rendering location -->
                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                          VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                                          RecognizesAccessKey="True"/>