8/10/2023 0 Comments Define raster approach![]() ![]() NET Compact Frameworkīorder color of a window when the window is activeĬolor of the background in the caption when a window is activeĬolor of the text in the caption when a window is activeĬolor of the unused area in an MDI a applicationīackground color for a three-dimensional controlĬolor of the middle of the shadow for a three-dimensional controlĬolor of the darkest shadow for a three-dimensional controlĬolor of the lightest element in a three-dimensional controlĬolor of the lightest edge for a three-dimensional controlĬolor for drawing grayed text (e.g., for disabled controls)īackground color of highlighted areas for menus, ListBox controls, and TextBox controlsīorder color of a top-level window when the window is inactiveĬolor of the background in the caption when a window is inactiveĬolor of the text in the caption when a window is inactive When specifying the color for drawing text, these system There are, after all, many uses of text in the user interface. If you study this table, you may notice that several entries have the word Text in the name-such as ControlText and WindowText. ![]() System colors are available as read-only properties in the SystemColors class, the contents of which are summarized in Table 15.7. To match corporate logo colors or to meet unique environmental requirements such as usage in low-light conditions or in sunlight.įor all of these cases, the safest approach to selecting text colors involves using system colors. ![]() ![]() A custom embedded smart device could easily be created with a unique system color scheme-say, Other platforms, like the Pocket PC, do not provide the user with an easy way On some platforms, users can change system colors from the system control panel (suchĪs on desktop version of Microsoft Windows). System colors let you connect your program's graphical output to current system settings. When the energy for all three colors is 0, the color you see is black when all the energy for all three colors is at 100% ( 255), the resulting color is white. It is sometimes helpful to remember that RGB is a video-oriented color scheme often used for display screens and televisions. Is defined with a byte, meaning that values can range from 0 to 255. When you specify a color using an RGB value, you specify an amount of red, an amount of green, and an amount of blue. Color names are made available as static properties of the Color structure. Whether or not you like all the names of the colors you encounter, they provide a way to specify colors that is easy to There are also a large number of colors with less common names like SeaShell and PeachPuff. Named colors provide access to colors that use human-readable names like Red, Green, Blue, White, and Black. Available system colors are listed in Table 15.7 in the System Colors subsection. System colors are made available as properties of the SystemColors 19 class. For example, a given system might be set up with black text on a white background, or it couldīe set up with the opposite, white text on a black background. The use of system colors helps create consistencyīetween different programs. System colors are a set of colors used to draw the elements of the user interface. There are three ways to specify a color in a. They are indirectly specified through a pen or brush. So even though color parameters are not directly used as parameters to methods, When drawing lines, the line color is the color that is part of a pen.īrushes are also used to specify text color. For example, for filling areas, the color to use forįilling the area is the color that is part of a brush. Methods require other drawing attributes that have a built-in color. The most basic type of drawing attribute is color, yet few drawing methods accept colors directly as parameters. Then, we need to know how to define colors and how to create brushes. Before we can fill an area with any of these functions, 17 The other two methods accept a Brush 18 object as the parameter that identifies the color to use to fill the area. The Clear method accepts a single parameter, a structure of type Color. Three methods in the Graphics class to fill a rectangular area:įills a specified rectangle using a brush If you study any window onĪny display screen, you are likely to see that the background is a single color, often white or sometimes gray. On a display screen, this is one of the most common operations. The simplest raster operation is to fillĪ rectangle with a single color. We define raster graphics as those functions that operate on an array of pixels. NET Compact Framework Programming with C# ![]()
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