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Painting Logic
Painting Logic | Telerik Presentation Framework
This article describes how the Telerik Presentation Framework elements are painted.
winforms/telerik-presentation-framework/painting-logic
painting, logic
false
16

Painting Logic

Painting is initiated by [RadControl]({%slug winforms/telerik-presentation-framework/class-hierarchy/radcontrol%}). When the OnPaint event inherited from ScrollableWindow fires, the RootElement Paint method is called, followed by the inherited OnPaint method.

RadElement's Paint performs the following:

  • Saves state, including retaining transformation matrices and clipping regions to be restored at the end of the painting process.

  • Transforms graphics using the context of the parent.

  • If necessary, the graphic is clipped.

  • The element is painted.

  • The children of the element are painted. For each child element painted, the virtual PaintOverride method is called. Override this method to customize painting at a fine grain level.

  • Previously saved state is restored.

Transformations

Transformations are changes to:

  • Position (also called translation). In RadElements, these changes take the form of offsets, e.g. padding, margin, border.

  • Size (also called scaling) is controlled by the RadElement ScaleTransform property.

  • Rotation is controlled by the RadElement AngleTransform property.

Transformation uses the context of the parent:

  • The RootRadElement is transformed in relation to the control's client area

  • An element is transformed in relation to the root element.

  • Primitives are transformed in relation to the elements they appear in.

See Also

  • [Animations]({%slug winforms/telerik-presentation-framework/animations%})

  • [Dependency Properties]({%slug winforms/telerik-presentation-framework/dependency-properties%})

  • [Handling User Input]({%slug winforms/telerik-presentation-framework/handling-user-input%})

  • [HTML-like Text Formatting]({%slug winforms/telerik-presentation-framework/html-like-text-formatting%})

  • [Inherit themes from RadControls derivatives]({%slug winforms/telerik-presentation-framework/inherit-themes-from-radcontrols-derivatives%})

  • [Microsoft Active Accessibility Support]({%slug winforms/telerik-presentation-framework/microsoft-active-accessibility-support%})

  • [Override Theme Settings at Run Time]({%slug winforms/telerik-presentation-framework/override-theme-settings-at-run-time%})

  • [RadMarkupDialog]({%slug winforms/telerik-presentation-framework/radmarkupdialog%})