AN3128 datasheet(38/105 Pages) STMICROELECTRONICS

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Multi-input embedded GUI library firmware

AN3128

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Doc ID 16918 Rev 5

4.1.15

DestroyPage API global function

Table 20 describes the DestroyPage function:

Example:

GL_ErrStatus errStatus;

/* Declares and initiates a Page Object */

GL_Page_TypeDef page1;

Create_PageObj( &page1 );

. . . . . .

/* Adding an object with specified coordinates to a PageControl */

errStatus = AddPageControlObj( (uint16_t)(LCD_Width/2), (uint8_t)(LCD_Height/2),

MyGraphicObject, &page1);

/* De-allocate all the Object belonging to a Page */

DestroyPage(&page1);

Once a page object instance is created, it can be destroyed at any time using the

DestroyPage function, and its pointer is set to NULL.

4.1.16

Set_Label API global function

Table 21 describes the Set_Label function:

Table 20.

DestroyPage API function

Name

Description

Function name

DestroyPage

Function prototype

GL_ErrStatus DestroyPage (GL_Page_TypeDef * pPage)

Behavior description

Free the allocated memory for all the PageControl objects belonging to a

page

Input parameter {x}

*pPage: pointer to page structure

Output parameter {x}

None

Return value

GL_OK if successful, GL_ERROR otherwise

Required preconditions

NewXXX must have been called before, where XXX represents a kind of

graphical object

Called functions

No API/HAL layer functions

Table 21.

Set_Label API function

Name

Description

Function name

Set_Label

Function prototype

GL_ErrStatus Set_Label (GL_Page_TypeDef* pPage, char* objName, char*

Label)

Behavior description

Modify the Label in a Label Object

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