OpenLayer Offline Manual

Refresh

static void Refresh()

Refresh the contents of the active rendering surface.

Before OpenLayer 2.0 (when Canvas didn't exist) the way to refresh the screen was to call GfxRend::RefreshScreen(). However, RefreshScreen didn't support changing the rendering surface and thus Canvas was introduced.

GfxRend::RefreshScreen can still be used for backwards compability but it's highly deprecated as it may mess up your code if you use Canvas as well. So if you use Canvas, it's best to use only Canvas, not RefreshScreen.

Examples

// Refresh the contents of the active canvas //
Canvas::Refresh();

Other functions of the class Canvas

SetTo	Selects the active rendering surface
Refresh	Refresh the contents of the active rendering surface
Fill	Fills the active rendering surface with the specified color
SetClipping	Sets the clipping region of the active rendering surface
DisableClipping	Disables the clipping region
GetClippingRegion	GetClippingRegion
Width	Returns the width of the active rendering surface
Height	Returns the height of the active rendering surface
Advanced functions
SetPixelWriteMode	Selects which color components the rendering functions affect

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