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GR32_Layers

TCustomLayer

TCustomLayer.HitTest

function HitTest(X, Y: Integer): Boolean;

Description

Performs a hit test of the layer at specified point and returns True if the point have passed the test.

After performing default hit test, specific for particular type of a layer, this method also calls OnHitTest event, in case you need some run-time customization.

By default:

• TCustomLayer always passes the hit test;
• TPositionedLayer passes only the points lying inside the rectangle, returned by GetAdjustedLocation;
• Depending on the AlphaHit property, TBitmapLayer is capable of passing only coordinates corresponding to non-transparent pixels.

See Also

TBitmapLayer.AlphaHit, TPositionedLayer.GetAdjustedLocation, OnHitTest, TBitmapLayer, TCustomLayer, TPositionedLayer, Using Layers

Copyright ©2000-2007 Alex Denisov and Contributors   -   Graphics32 v1.8.3   -   Build on 4-March-2007