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Wpf colorpicker toolkit12/30/2023 ![]() He already has a DependencyProperty with a ChangeCallback. Now you can think why he registered an RoutedEvent. NET event-or event wrapper-is defined to enable more familiar use from procedural code and adding a handler in XAML with event attribute syntax. The routed event is registered much like a dependency property in the static constructor, and a normal. Just as dependency properties are represented as public static DependencyProperty fields with a conventional Property suffix, routed events are represented as public static RoutedEvent fields with a conventional Event suffix. The first parameter is my default color, which is white, and the last one is an PropertĺhangedCallback which call the method OnIsCurrentColorChanged. The last one is an FrameworkPropertyMetadata. Typeof _ColorPicker means that the property is registered on the _ColorPicker class. I used color because the value which will be stored in it will be a RGB color. The first parameter is the name of the property, the second one is the type of the property. For an example, I registered a DependencyProperty called IsCurrentColorProperty. In my case, I used the DependencyProperties for getting a notification if Current or last Color changed. NET languages (other than XAML) has an intrinsic understanding of a dependency property. This is all accomplished via WPF APIs no. NET properties hooked into some extra WPF infrastructure. In practice, dependency properties are just normal. So you can see the value stored in a textbox and the position in graphic mode. When you set the value property, the class calculates the length of a border. ValueBox.cs : This class has some properties -> Maximum and Value, and some events.MouseControling.cs : This one also includes some API calls -> SetCursorPos, GetCursorPos, GetPixel, GetWindowDC and ReleaseDC. ![]() This is possible by using an API-Method called ClipCursor which is stored in the user32.dll. ![]() It allows to clip the mouse to any UIElement. MouseClipping.cs : This is one tricky class.CopyBox.cs: This class inherits from border, and the border includes a textbox, and one property called value, which sets or gets the current value of the CopyBoxes.So I can say this class controls the main user interaction. It includes the basic events and the units mentioned above. _ColorPicker.xaml with codefile: This one is the root element. ![]() My project includes the following classes: My second idea was to set the mouse to the last position wherever you clicked one of these units. So what I mean is, the mouse gets "jailed", you can't move out of this location. The main idea of this project was to clip the mouse to the ColorPicker or ColorSelectorUnit in the way which one has been clicked. Last but not least is the ColorInfoUnit which shows you the RGB and HEX value of the color. The ColorPickerUnit is the left square, the ColorSelectorUnit describes the centered square in the image you can see, the ColorBarUnit is at the bottom, and shows the Current and Last selected color. The ColorPicker is split in four main parts: So when the value changes, the respective event will be thrown. This ColorPicker includes some event wrappers for CurrentColorChanged and LastColorChanged. It allows you to pick a color from a specified range.
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