AN3128 datasheet(23/105 Pages) STMICROELECTRONICS

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AN3128

Multi-input embedded GUI library firmware

Doc ID 16918 Rev 5

23/105

4.1.1

NewLabel API global function

Table 6 describes the NewLabel 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((uint16_t)((LCD_Width/11)*9),(uint8_t)(LCD_Height/11),pageLabel,

&page1);

Once a Label Object instance is created using the NewLabel function, the Label Object itself

provides all its features through its internal function pointers.

Figure 14, 15, 16, show, in detail, the Label Object properties and methods which the final

application can use to interact with.

Table 6.

NewLabel API function

Name

Description

Function name

NewLabel

Function prototype

GL_PageControls_TypeDef* NewLabel (char* oName, char* Label,

GL_Direction_direction, GL vu8 FontSize, GL vuint16_t color)

Behavior description

Create and initialize a new Label Object (a C structure)

Input parameter {x}

oName: object name

Label: text on a Label Object

Direction: the direction to follow printing the Label

FontSize: the size of the font: FONT_BIG or FONT_SMALL

Color: color of the Label text

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

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