Copyright © 1998-2010 MultiMedia Soft

How to render buttons over a picture

Previous pageReturn to chapter overviewNext page

By default, 3D Active Button Magic controls will be drawn on the solid background of the container form so they will anti-alias their borders using the background color of the container form itself: this can be an issue if the container form has a background picture instead of a solid background; you can manage this situation in two ways depending upon the need of your application:

 

If rendering speed is an important issue

When 3D Active Button Magic controls are rendered over a picture, anti-aliasing can significantly degrade performance. In this case, it is best to disable anti-aliasing at design-time.  (See the Others tab for more details)

3dabm_i0000f6

You can also disable the use of anti-aliasing at Runtime, setting to FALSE the UseAntialiasing property.

 

If graphic quality is more important than rendering speed

In this case we can use anti-aliasing (set by default) and, more important, we can tell the control to anti-alias with the underlying picture through the Transparent factor setting available inside the Surfaces tab of 3D Button Visual Editor; setting this value to 1, will cause the control to grab the underlying picture for an optimal anti-aliasing of its borders. Note that setting this value to higher values will raise the control transparency factor.

3dabm_i0000f8

The mentioned Transparent factor setting can be changed at runtime through the SurfaceTransparentFactor property.

 

On the picture below you can see a summary of the available options:

worst solution, no action taken: button 1 have its borders anti-aliased with the container form background color and displays an unwanted white line around its borders
best solution for speed: button 2 doesn't use anti-aliasing but you can see the jagged borders around the control.
best solution for graphic quality: button 3 use anti-aliasing (set by default) and has the Transparent factor set to 1: no jagged border is visible.
best solution for graphic quality and use of transparency: button 4 use anti-aliasing (set by default) and has the Transparent factor set to 128: no jagged border is visible and the underlying picture appears through the button.

3dabm_i0000fa