Difference between revisions of "platform.window:invalidate"
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This routine invalidates a region of the window by firing the [[on.paint]] event, thus forcing it get repainted.<br /> | This routine invalidates a region of the window by firing the [[on.paint]] event, thus forcing it get repainted.<br /> | ||
| − | x and y default to (0, 0) and width and height default to the pixel width and height of the window.<br /> | + | x and y default to (0, 0) and width and height default to the pixel width and height of the window.<br />These arguments are optional. |
| + | |||
<br /> | <br /> | ||
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! Parameter !! Type !! Description | ! Parameter !! Type !! Description | ||
|- | |- | ||
| − | | <u>x</u> || number || x-coordinate of the upper-left origin. | + | | <u><center>x</center></u> || number || x-coordinate of the upper-left origin. |
|- | |- | ||
| − | | <u>y</u> || number || y-coordinate of the upper-left origin. | + | | <u><center>y</center></u> || number || y-coordinate of the upper-left origin. |
|- | |- | ||
| − | | <u>width</u> || number || width of the region to be refreshed. | + | | <u><center>width</center></u> || number || width of the region to be refreshed. |
|- | |- | ||
| − | | <u>height</u> || number || height of the region to be refreshed. | + | | <u><center>height</center></u> || number || height of the region to be refreshed. |
|} | |} | ||
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== Good to know == | == Good to know == | ||
The entire window can be forced to repaint with by calling the function with no arguments : ''platform.window:'''''invalidate'''() , allowing all parameters to take their default values. | The entire window can be forced to repaint with by calling the function with no arguments : ''platform.window:'''''invalidate'''() , allowing all parameters to take their default values. | ||
| + | |||
| + | Repainting only a part of the widget (thanks to providing the necessary arguments) only currently works on-calc, not on the software. | ||
== See also == | == See also == | ||
Latest revision as of 21:30, 7 August 2011
platform.window:invalidate is a function that is part of platform.window.
This routine invalidates a region of the window by firing the on.paint event, thus forcing it get repainted.
x and y default to (0, 0) and width and height default to the pixel width and height of the window.
These arguments are optional.
This has been introduced in TI-Nspire OS 3.0 (Changes).
Syntax
platform.window:invalidate([x, y, width, height])
| Parameter | Type | Description |
|---|---|---|
| number | x-coordinate of the upper-left origin. | |
| number | y-coordinate of the upper-left origin. | |
| number | width of the region to be refreshed. | |
| number | height of the region to be refreshed. |
Examples
platform.window:invalidate()platform.window:invalidate(0, 0, 50, 10)Good to know
The entire window can be forced to repaint with by calling the function with no arguments : platform.window:invalidate() , allowing all parameters to take their default values.
Repainting only a part of the widget (thanks to providing the necessary arguments) only currently works on-calc, not on the software.
See also
