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TimePicker Control for WPF

TimePicker Control

Description

The TimePicker is a custom control for .NET's WPF library, designed to facilitate easy time selection within your WPF applications. It addresses the need for a robust and customizable time selection feature, which is not available natively in the WPF control library. The control supports both 24-hour and 12-hour formats and provides the flexibility to set minimum and maximum time constraints.

How to Use

To utilize the TimePicker control in your XAML, use the following syntax:

<custom:TimePicker SelectedTime="{Binding SelectedTime}" Is24HourFormat="True" />

In the above snippet, replace custom with the XML namespace where your TimePicker control is defined.

Exposed Properties

The TimePicker control exposes the following properties:

  • SelectedHour: Represents the currently selected hour. For a 24-hour format, the range is 0-23 and for a 12-hour format, it is 1-12.
  • SelectedMinute: Represents the currently selected minute, ranging from 0-59.
  • SelectedAmPm: Used in the 12-hour format to indicate AM (0) or PM (1). This property is not applicable in the 24-hour format.
  • SelectedTime: Combines the selected hour and minute into a DateTime object.
  • MinimumTime: Defines the earliest time that can be selected. If not set, there are no minimum time constraints.
  • MaximumTime: Defines the latest time that can be selected. If not set, there are no maximum time constraints.
  • Is24HourFormat: Determines whether the control displays time in a 24-hour or 12-hour format. The default is false (12-hour format).
  • TimeFormat: Allows customization of the string format for time display, using standard .NET DateTime format strings.

Dependency Properties

The TimePicker control introduces several dependency properties including SelectedHourProperty, SelectedMinuteProperty, SelectedAmPmProperty, SelectedTimeProperty, MinimumTimeProperty, MaximumTimeProperty, Is24HourFormatProperty, and TimeFormatProperty. These properties extend support for data binding, default values, and property change notification.

Template Parts

The TimePicker control uses the following parts:

  • PART_HourSelector: A ComboBox displaying selectable hours.
  • PART_MinuteSelector: A ComboBox displaying selectable minutes.
  • AmPmSelector: A ComboBox displaying selectable AM/PM options (only applicable for the 12-hour format).

You can customize these parts using the Style property:

<local:TimePicker>
    <local:TimePicker.Style>
        <!-- Your custom style here -->
    </local:TimePicker.Style>
</local:TimePicker>

Customization

You can customize the TimePicker control by overriding its default style in your XAML. To customize a particular part of the control, style it using the respective part names: PART_HourSelector, PART_MinuteSelector, AmPmSelector.

For instance, to change the background color of the hour selector:

<Style TargetType="{x:Type local:TimePicker}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:TimePicker}">
                <!-- Your custom template here -->
                <ComboBox x:Name="PART_HourSelector"

Apologies for the confusion. Here is the complete updated README:

# TimePicker Control for WPF

![TimePicker Control](https://i.imgur.com/TDHHsJs.png)

## Description

The `TimePicker` is a custom control for .NET's WPF library, designed to facilitate easy time selection within your WPF applications. It addresses the need for a robust and customizable time selection feature, which is not available natively in the WPF control library. The control supports both 24-hour and 12-hour formats and provides the flexibility to set minimum and maximum time constraints.

## How to Use

To utilize the `TimePicker` control in your XAML, use the following syntax:

```xaml
<custom:TimePicker SelectedTime="{Binding SelectedTime}" Is24HourFormat="True" />

In the above snippet, replace custom with the XML namespace where your TimePicker control is defined.

Exposed Properties

The TimePicker control exposes the following properties:

  • SelectedHour: Represents the currently selected hour. For a 24-hour format, the range is 0-23 and for a 12-hour format, it is 1-12.
  • SelectedMinute: Represents the currently selected minute, ranging from 0-59.
  • SelectedAmPm: Used in the 12-hour format to indicate AM (0) or PM (1). This property is not applicable in the 24-hour format.
  • SelectedTime: Combines the selected hour and minute into a DateTime object.
  • MinimumTime: Defines the earliest time that can be selected. If not set, there are no minimum time constraints.
  • MaximumTime: Defines the latest time that can be selected. If not set, there are no maximum time constraints.
  • Is24HourFormat: Determines whether the control displays time in a 24-hour or 12-hour format. The default is false (12-hour format).
  • TimeFormat: Allows customization of the string format for time display, using standard .NET DateTime format strings.

Dependency Properties

The TimePicker control introduces several dependency properties including SelectedHourProperty, SelectedMinuteProperty, SelectedAmPmProperty, SelectedTimeProperty, MinimumTimeProperty, MaximumTimeProperty, Is24HourFormatProperty, and TimeFormatProperty. These properties extend support for data binding, default values, and property change notification.

Template Parts

The TimePicker control uses the following parts:

  • PART_HourSelector: A ComboBox displaying selectable hours.
  • PART_MinuteSelector: A ComboBox displaying selectable minutes.
  • AmPmSelector: A ComboBox displaying selectable AM/PM options (only applicable for the 12-hour format).

You can customize these parts using the Style property:

<local:TimePicker>
    <local:TimePicker.Style>
        <!-- Your custom style here -->
    </local:TimePicker.Style>
</local:TimePicker>

Customization

You can customize the TimePicker control by overriding its default style in your XAML. To customize a particular part of the control, style it using the respective part names: PART_HourSelector, PART_MinuteSelector, AmPmSelector.

For instance, to change the background color of the hour selector:

<Style TargetType="{x:Type local:TimePicker}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:TimePicker}">
                <!-- Your custom template here -->
                <ComboBox x:Name="PART_HourSelector" Background="Red"

```xml
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Please ensure that you keep the part names (PART_HourSelector, PART_MinuteSelector, AmPmSelector) intact when customizing the control, as the control uses these part names in its code-behind to apply functionality.

Events

The TimePicker control raises the SelectedTimeChanged event when the selected hour, minute, or AM/PM value is changed. You can handle this event to respond to changes in the user's selection.

Methods

The TimePicker control includes several methods essential for its operation:

  • OnSelectedHourChanged: Called when the SelectedHour property changes. Updates the SelectedTime property.
  • OnSelectedMinuteChanged: Called when the SelectedMinute property changes. Updates the SelectedTime property.
  • OnSelectedAmPmChanged: Called when the SelectedAmPm property changes. Updates the SelectedTime property if the control is not in the 24-hour format.
  • OnIs24HourFormatChanged: Called when the Is24HourFormat property changes. Updates the TimeFormat property to the default format for the new setting.
  • GetDefaultTimeFormat: Returns the default time format string for the current Is24HourFormat setting.
  • OnApplyTemplate: Overridden to initialize the template parts when the control's visual tree is generated.
  • PopulateHourSelector: Populates the hour selector with the appropriate range of hours based on the current Is24HourFormat setting.
  • PopulateMinuteSelector: Populates the minute selector with minutes from 00 to 59.

Conclusion

The TimePicker control provides a versatile and robust solution for time selection in WPF applications. It offers a wide range of customization options, including support for both 24-hour and 12-hour formats, and the ability to set minimum and maximum time constraints. With built-in support for data binding and property change notification, it seamlessly integrates into MVVM applications, enriching your user interfaces with a comprehensive time selection feature.