Скачать или смотреть How to Disable Dates in JavaFX DatePicker Without Re-enabling Previously Disabled Dates

Learn how to effectively disable specific dates in JavaFX's DatePicker without re-enabling any previously disabled dates. This guide will walk you through the implementation step-by-step.
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This video is based on the question https://stackoverflow.com/q/67709013/ asked by the user 'Gísli V.' ( https://stackoverflow.com/u/15971833/ ) and on the answer https://stackoverflow.com/a/67711403/ provided by the user 'James_D' ( https://stackoverflow.com/u/2189127/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Disabling Dates in JavaFX DatePicker: A Comprehensive Guide

When working with JavaFX's DatePicker, you may find yourself needing to disable certain dates based on specific logic. A common requirement is to disable specific weekdays, such as Mondays, without unintentionally re-enabling other previously disabled dates like those before today. Today, we'll explore how to achieve this in a clear and structured manner.

The Problem: Managing Date Restrictions

You may want to disable:

Past Dates: Restrict users from selecting any dates before the current date.

Specific Weekdays: In this scenario, we want to disable Mondays when a button is pressed.

Initial Attempt

Initially, it might seem straightforward to create a date picker with a button to disable certain dates. However, implementing this can often lead to the re-enabling of previously disabled dates due to how the JavaFX cell factory works. Hence, we need a better approach to manage the date disable configuration within our application.

The Solution: Leveraging Properties and Filters

To prevent the re-enabling of previously disabled dates when adding new restrictions, we can utilize JavaFX's property binding and filters. Let’s break this down into steps.

Step 1: Create a Property for Disabled Dates

We will introduce a property that tracks whether Mondays should be disabled. This allows us to centrally manage date disabling logic.

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Step 2: Set the Day Cell Factory

The Day Cell Factory is crucial for customizing which dates are disabled in the date picker. We’ll bind it to the Boolean property so that it dynamically updates the enabled/disabled state of the cells.

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Step 3: Button Action to Toggle Monday Disabling

Next, we need a way to toggle the disabling of Mondays through a button click.

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Step 4: Putting it All Together

Here’s how the complete code will look:

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Conclusion

By using properties and an effective cell factory setup, you can easily manage disabling specific dates in JavaFX’s DatePicker without affecting previously set restrictions. This approach is not only modular but also efficient, providing a great user experience.

Feel free to implement this in your JavaFX applications and customize it to suit your needs!