GraphicsShell: drawing and zooming

Found in: epoc32ex\Graphics

GraphicsShell provides an application shell, and two concrete controls.

CGraphicExampleControl is a control class, derived from CCoeControl, which links the app shell to the particular controls.

CDrawControl illustrates the drawing of shapes in a window. The code draws points, lines and shapes; this exercises a variety of drawing functions provided by the window graphics context such as MoveTo(), DrawLineTo(), DrawArc() etc.

CZoomControl illustrates the use of zooming.

The controls are listed on the menu List of Programs. Press the appropriate menu item to select a specific control.

You step through each phase of an example by pressing the space bar or by tapping on the window drawn by that example.

By the drawing control:

• TPoint: 2-dimensional geometric point

• TRect: a geometric rectangle

• TSize: 2-dimensional geometric size

• CWindowGc: the window graphics context

• TRgb: colour representation

• CFont: font interface class

By the zooming control:

• TFontSpec: font specification in device independent terms

• CWindowGc: the window graphics context

• CFont: font interface class

• TZoomFactor: zoom factor and twips/pixels conversions

• MGraphicsDeviceMap: a mixin class defining the interface for mapping between twips and device-specific units (pixels)

• CFbsBitmap: Bitmap managed by the font and bitmap server