AN3128 datasheet(43/105 Pages) STMICROELECTRONICS

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AN3128

Multi-input embedded GUI library firmware

Doc ID 16918 Rev 5

43/105

4.1.21

GetComboOptionActive API global function

Table 26 describes the GetComboOptionActive function:

Example:

/* Declares and initiates a Page Object */

GL_Page_TypeDef page1;

Create_PageObj( &page1 );

/* Declares and initiates a ComboBoxGroup with its ComboOptions Object and add it

with specified coordinates to a Page Object */

GL_PageControls_TypeDef* MyComboBoxGrp = NewComboBoxGrp("MyComboBoxGrp");

AddComboOption (MyComboBoxGrp ->objPTR, "Option1", MyComboboxFunc);

AddComboOption (MyComboBoxGrp ->objPTR, "Option2", MyComboboxFunc);

AddComboOption (MyComboBoxGrp ->objPTR, "Option3", MyComboboxFunc);

AddPageControlObj(((LCD_Width/10)*7),(LCD_Height/2),MyComboBoxGrp,&page1);

void MyComboboxFunc(void)

{

if (page1.Page_Active == GL_TRUE)

{

if( GetComboOptionActive( &page1, "MyComboBoxGrp" ) == 1 )

{

GL_DisplayAdjStringLine( (uint16_t)(LCD_Height/2), (uint16_t)(LCD_Width),

"You've chosen option1", GL_TRUE );

}

else if( GetComboOptionActive( &page1, "MyComboBoxGrp" ) == 2 )

{

GL_DisplayAdjStringLine( (uint16_t)(LCD_Height/2), (uint16_t)(LCD_Width),

"You've chosen option2", GL_TRUE );

}

else if( GetComboOptionActive( &page1, "MyComboBoxGrp" ) == 3 )

{

GL_DisplayAdjStringLine( (uint16_t)(LCD_Height/2), (uint16_t)(LCD_Width),

"You've chosen option3", GL_TRUE );

}

Table 26.

GetComboOptionActive API function

Name

Description

Function name

GetComboOptionActive

Function prototype

GL_uint8_t GetComboOptionActive(GL_Page_TypeDef* pPage, char*

objName)

Behavior description

Return the active combo option number

Input parameter {x}

*pPage: pointer to page structure

objName: name of the object

Output parameter {x}

None

Return value

j: the active combo option index if the object was found

GL_NULL: if the object was not found

Required preconditions None

Called functions

No API/HAL layer functions

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