Difference between revisions of "platform.window:invalidate"
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(Created page with "__NOTOC__ platform.window:'''invalidate''' is a function that is part of platform.window. This routine invalidates a region of the window and for...") |
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| − | This routine invalidates a region of the window | + | 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 /> | ||
| + | <br /> | ||
{{Since|3.0}} | {{Since|3.0}} | ||
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! Parameter !! Type !! Description | ! Parameter !! Type !! Description | ||
|- | |- | ||
| − | | <u>x</u> || number || | + | | <u>x</u> || number || x-coordinate of the upper-left origin. |
|- | |- | ||
| − | | <u>y</u> || number || | + | | <u>y</u> || number || y-coordinate of the upper-left origin. |
|- | |- | ||
| − | | <u>width</u> || number || | + | | <u>width</u> || number || width of the region to be refreshed. |
|- | |- | ||
| − | | <u>height</u> || number || | + | | <u>height</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. | ||
Revision as of 01:16, 25 May 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.
This has been introduced in TI-Nspire OS 3.0 (Changes).
Syntax
platform.window:invalidate([x, y, width, height])
| Parameter | Type | Description |
|---|---|---|
| x | number | x-coordinate of the upper-left origin. |
| y | number | y-coordinate of the upper-left origin. |
| width | number | width of the region to be refreshed. |
| height | 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.
See also
