Color Picker Control 1.2 Description:

One of the primary goals for the Color Picker Control component was the ability to easily extend it beyond its built-in functionality by other developers.

For this task the color picker was splitted into a general management part (e.g. control handling) and the specialized parts, which are different for each kind of color picker. Such a specialized component is named color widget and a set of basic widgets were created as the initial functionality.

Color Picker Control 1.2 Features:

Color Widgets, nuts and bolts of the tool:
· Many of the widgets listed above represent a discrete set of colors that can be displayed in different ways. The image to the right shows four of the possible layouts such widgets can have. The first one is a simple list. Beside it in the first row you see a list with color names and a widget with vertical stripes layout. The large widget finally uses a square collection without any spacing and is a color swatch widget that has the Adobe Photoshop Elements 2 web spectrum swatch loaded.

· Of course you can have any kind of widget, not just discrete color collections. The HLS circle shows one possiblity, others include ramps, color wheels or even 3 dimensional color selectors. Possibilities are only limited by your imagination.

· In order to support advanced selection abilities a widget can use any out of a list of color spaces and schemes. This includes not only RGB, but also CMY(K), CIE L*a*b, gray scale, HLS, HLV, CIE XYZ, YCbCr, YUV(K) and Yxy. Most of the handling for this stuff is implemented in my Color Tools library, which also contains a lot of other useful functionality. Since color schemes are enforced by the widgets not the color picker control there can be even more exotic schemes. It is all a matter of what a particular widget supports. Because of this variety of schemes it is necessary to establish a commonly known exchange mechanism, so each color widget is required to convert between its native color scheme and CIE XYZ as neutral exchange format. The base implementation additionally provides methods for conversion to and from RGB (actually a Windows color reference) and to a display color. Both RGB colors can be gamma corrected and the display color additionally uses the color management support of the OS for highly accurate display. Certain color spaces (gray scale, CIE L*a*b* etc.) also need a white point for conversion, which can be specified as well.

· This precision produces very good display results that can keep up with those of Photoshop. That in turn allows the new color picker control to be used in applications where color fidelity plays an important role. But of course also simpler color selection tasks are a good field of application without the control getting unnecessarily complex.

Co-workers sought:
· Due to the alpha stadium of the project there are still a lot of things expected to change in the development process. One design goal, which has recently be added is to create all classes in such a way, that they can easily be ported to Delphi.NET. Currently there are still Windows messages used in the control, but plans are to changed this so that they are no longer needed. Nonetheless, the color picker control can already be used in applications and its current state is a good starting point for further development. What is needed are more programmers to drive its development. Also creators for new color picker widgets are needed, to increase the attraction to potential users. So if you have interest to help with the development then do not hesitate to contact me (see below for the webmaster e-mail address).

Design time support:
· Another planned and partially implemented speciality of the color picker is its extended design time support for the Delphi IDE. There is a special component editor to allow the modification of the widget structure of a color picker. But not only that. With some neat tricks it was possible to replace the color selection comobobox that is used in the IDE by an own implementation that supports the full range of color selection abilities, including individual manipulation of each color component. See below a screen shot of the Delphi IDE with an open color picker component editor.

Platform compatibility:
· The Soft Gems Color Picker is using some functionality of the operation system that is not available on all platforms. This is mainly alpha blending and gradients. But since these things are not supported on Windows 95 you cannot use the component set with this OS.

Color Picker Control 1.2 Requirements:

· Delphi 4 - 5, BCB 4 - 5

Related searches:

absolute color picker - color picker - peacock color picker - web button menu maker - absolute color picker activex control

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