AN3128 datasheet(29/105 Pages) STMICROELECTRONICS

29 / 105 page

AN3128

Multi-input embedded GUI library firmware

Doc ID 16918 Rev 5

29/105

Example:

/* Declares and initiates a Page Object */

GL_Page_TypeDef page1;

Create_PageObj( &page1 );

/* Declares and initiates a RadioButton Group Object */

GL_RadioButtonGrp_TypeDef* RButtonGrp = NewRadioButtonGrp("RButtonGrp");

/* Declare/initiate a RadioOption Object and add it with specified coordinates to a

Page Object */

GL_PageControls_TypeDef

* ROption_a = RADIO_BUTTON_ADD(RButtonGrp,"Option1",RBtnFunc1);

GL_PageControls_TypeDef

* ROption_b = RADIO_BUTTON_ADD(RButtonGrp,"Option2",RBtnFunc2);

AddPageControlObj((uint16_t)(LCD_Width/2),(uint8_t)((LCD_Height/9)*3),ROption_a,

&page1);

AddPageControlObj((uint16_t)(LCD_Width/2),(uint8_t)((LCD_Height/9)*4),ROption_b,

&page1);

Note:

As can be seen from the code above, to simplify the adding of a radio option the user should

not directly use the function “AddRadioOption()”, but must use the following macro instead:

#define RADIO_BUTTON_ADD(RadioButtonGrpName, Label, Function) \

RadioButtonGrpName->AddRadioOption(RadioButtonGrpName,Label,Function);

Once a RadioOption object instance is created using the AddRadioOption function, the

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

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

final application can use to interact with.

4.1.8

NewComboBoxGrp API global function

This kind of object allows the user to choose an option from a list of alternatives that can be

scrolled by selecting the up/down arrows.

Figure 10.

Combobox graphical layout

Input parameter {x}

GL_RadioButtonGrp_TypeDef*: pThis

Label: Label for RadioButton option

pEventHandler: pointer to function associated to its touch event

Output parameter {x}

None

Return value

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

Required preconditions

NewRadioButtonGrp must have been called before

Called functions

No API/HAL layer functions

Table 12.

AddRadioOption API function (continued)

Name

Description

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