AN3128 datasheet(36/105 Pages) STMICROELECTRONICS

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Multi-input embedded GUI library firmware

AN3128

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Doc ID 16918 Rev 5

Example:

/* Declares and initiates a Page Object */

GL_Page_TypeDef page1;

Create_PageObj( &page1 );

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

a Page Object */

int16_tMyChartPoints[24];

MyChartPoints = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24};

GL_PageControls_TypeDef* MyGraphChart = NewGraphChart("MyGraphChart", "Hours", "Wh",

MyChartPoints, 24);

AddPageControlObj( 0, 0, MyGraphChart, &page1 );

Once a GraphChart object instance is created using the NewGraphChart function, the

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

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

final application can use to interact with.

4.1.13

AddPageControlObj API global function

Table 18 describes the AddPageControlObj function:

The values of PosX and PosY parameters represent the coordinates of the top-left corner of

the object according to the origin coordinates placed in the top-right corner of the LCD.

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 17.

NewGraphChart API function (continued)

Function name

NewGraphChart

Table 18.

AddPageControlObj API function

Name

Description

Function name

AddPageControlObj

Function prototype

GL_ErrStatus AddPageControlObj (GL_uint16_t PosX, GL_uint8_t PosY,

GL_PageControls_TypeDef* objPTR, GL_Page_TypeDef* pagePTR)

Behavior description

Add a new control object to the page

Input parameter {x}

PosX & PosY: max and min coordinates for X and Y axis

*objPTR: pointer to object structure

*pagePTR: pointer to page structure

Output parameter {x}

None

Return value

GL_OK if successful, GL_ERROR otherwise

Required preconditions

NewXXX must have been called before, where XXX represents a kind of

graphical object

Called functions

No API/HAL layer functions

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