AN3128 datasheet(30/105 Pages) STMICROELECTRONICS

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Multi-input embedded GUI library firmware

AN3128

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Doc ID 16918 Rev 5

Table 13 describes the NewComboBoxGrp function:

Example:

/* Declares and initiates a Page Object */

GL_Page_TypeDef page1;

Create_PageObj( &page1 );

/* Declares and initiates a ComboBoxGroup Object and add it with specified

coordinates to a Page Object */

GL_PageControls_TypeDef* MyComboGrp = NewComboBoxGrp("MyComboGrp");

AddPageControlObj((uint16_t)((LCD_Width/10)*8),(uint8_t)(LCD_Height/2),MyComboGrp,

&page1);

Once a ComboBoxGrp object instance is created using the NewComboBoxGrp function, the

ComboBoxGrp object itself provides all its features through its internal function pointers.

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

the final application can use to interact with.

4.1.9

AddComboOption API global function

Table 14 describes the AddComboOption function:

Table 13.

NewComboBoxGrp API function

Name

Description

Function name

NewComboBoxGrp

Function prototype

GL_PageControls_TypeDef* NewComboBoxGrp (char* oName)

Behavior description

Create and initialize a new

ComboBoxGrp object (a C structure)

Input parameter {x}

oName: object name

Output parameter {x}

None

Return value

The created object pointer or null if the object cannot be created

Required preconditions

None

Called functions

No API/HAL layer functions

Table 14.

AddComboOption API function

Name

Description

Function name

AddComboOption

Function prototype

GL_ErrStatus AddComboOption (GL_ComboBoxGrp_TypeDef* pThis,

char* Label, void* (*pEventHandler)(void))

Behavior description

Create and initialize a new ComboBoxOption object (a C structure)

Input parameter {x}

GL_ComboBoxGrp_TypeDef*: pThis

Label: Label for RadioButton option

pEventHandler: pointer to function associated to its touch event

Output parameter {x}

None

Return value

GL_OK if successful, GL_ERROR otherwise

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