AN3128 datasheet(42/105 Pages) STMICROELECTRONICS

42 / 105 page

Multi-input embedded GUI library firmware

AN3128

42/105

Doc ID 16918 Rev 5

Figure 14, 15, 16, show, in detail, the Combobox object properties and methods which the

final application can use to interact with.

4.1.20

ResetComboOptionActive API global function

Table 25 describes the ResetComboOptionActive function:

Example:

/* Declares and initiates a Page Object */

GL_Page_TypeDef page1;

Create_PageObj( &page1 );

/* Declares and initiates a Label Object and add it with specified coordinates to a

Page Object */

GL_PageControls_TypeDef* pageLabel = NewLabel("pageLabel", "Graphic Library",

GL_HORIZONTAL, GL_FONT_BIG, GL_Blue);

AddPageControlObj(((LCD_Width/11)*9),(LCD_Height/11),pageLabel,&page1);

/* Declares and initiates a Combobox object */

GL_PageControls_TypeDef* ComboBoxGrp1 = NewComboBoxGrp("ComboBoxGrp1");

AddComboOption (ComboBoxGrp1->objPTR, "Option1", ComboboxFunc);

AddComboOption (ComboBoxGrp1->objPTR, "Option2", ComboboxFunc);

AddComboOption (ComboBoxGrp1->objPTR, "Option3", ComboboxFunc);

AddPageControlObj(((LCD_Width/10)*7),(LCD_Height/2),ComboBoxGrp1, &page1 );

...

void ChangeFirstComboLabel(void)

{

if (page1.Page_Active == GL_TRUE)

{

page1.ShowPage(&page1, GL_FALSE);

ResetComboOptionActive(&page1, "ComboBoxGrp1");

/* Modify the active combobox option label" */

SetComboOptionLabel(&page1, "ComboBoxGrp1", "Option1_New");

page1.ShowPage(&page1, GL_TRUE);

}

Figure 14, 15, 16, show, in detail, the Combobox object properties and methods which the

final application can use to interact with.

Table 25.

ResetComboOptionActive API function

Name

Description

Function name

ResetComboOptionActive

Function prototype

GL_ErrStatus ResetComboOptionActive(GL_Page_TypeDef* pPage, char*

objName)

Behavior description

Reset the active combo option to the first one

Input parameter {x}

*pPage: pointer to page structure

objName: name of the object

Output parameter {x}

None

Return value

GL_OK if successful, GL_ERROR otherwise

Required preconditions None

Called functions

No API/HAL layer functions

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