App_widget_group

Data Structures
struct	app_calculator_t
	Calculator context. More...

Macros
#define	BT_H   40
	Height (in pixels) of a normal sized button. More...
#define	BT_POS_X(col)   (W_SP + (BT_W * (col)))
	Calculate button X coordinate. More...
#define	BT_POS_Y(row)   (W_SP + T_H + T_SP + (BT_H * (row)))
	Calculate button Y coordinate. More...
#define	BT_W   40
	Width (in pixels) of a normal sized button. More...
#define	BT_X   4
	Number of buttons in one column. More...
#define	BT_Y   5
	Number of buttons in one row. More...
#define	MAX_DIGITS   9
	Maximum number of digits on display. More...
#define	MAX_VALUE   999999999L
	Maximum value we can show on display. More...
#define	MIN_VALUE   -999999999L
	Minimum value we can show on display. More...
#define	T_H   16
	Height of the static text field. More...
#define	T_SP   16
	Spacing between static text and button pad. More...
#define	T_W   (BT_W * BT_X)
	Width of the static text field. More...
#define	W_SP   16
	Spacing between widget frame and components. More...

Functions
static bool	app_calc_handler (struct wtk_basic_frame *frame, win_command_t command_data)
	Frame handler for the application. More...
static void	app_calc_update_disp (struct app_calculator_t *calc)
	Update calculator display with new value. More...
bool	app_widget_launch (void)
	Setup widget demo. More...
static void	calc_perform_operation (struct app_calculator_t *calc)
	Perform calculation. More...

#define BT_H   40

Height (in pixels) of a normal sized button.

Referenced by app_widget_launch().

#define BT_POS_X

(

col

)

(W_SP + (BT_W * (col)))

Calculate button X coordinate.

Referenced by app_widget_launch().

#define BT_POS_Y

(

row

)

(W_SP + T_H + T_SP + (BT_H * (row)))

Calculate button Y coordinate.

Referenced by app_widget_launch().

#define BT_W   40

Width (in pixels) of a normal sized button.

Referenced by app_widget_launch().

#define BT_X   4

Number of buttons in one column.

Referenced by app_widget_launch().

#define BT_Y   5

Number of buttons in one row.

Referenced by app_widget_launch().

#define MAX_DIGITS   9

Maximum number of digits on display.

Referenced by app_calc_update_disp().

#define MAX_VALUE   999999999L

Maximum value we can show on display.

Referenced by app_calc_update_disp(), and calc_perform_operation().

#define MIN_VALUE   -999999999L

Minimum value we can show on display.

Referenced by app_calc_update_disp(), and calc_perform_operation().

#define T_H   16

Height of the static text field.

Referenced by app_widget_launch().

#define T_SP   16

Spacing between static text and button pad.

Referenced by app_widget_launch().

#define T_W   (BT_W * BT_X)

Width of the static text field.

Referenced by app_widget_launch().

#define W_SP   16

Spacing between widget frame and components.

Referenced by app_widget_launch().

static bool app_calc_handler ( struct wtk_basic_frame *  frame, win_command_t  command_data  )

static

Frame handler for the application.

Handles all command events from the widgets in the application frame.

See Also

wtk_basic_frame_command_handler_t

Parameters

frame	Pointer to the application frame
command_data	Command event ID

Returns

True if exiting, to destroy the window

References app_calc_update_disp(), calc_perform_operation(), app_calculator_t::calc_regs, app_calculator_t::CALC_STATE_ERROR, app_calculator_t::CALC_STATE_READY, app_calculator_t::CALC_STATE_WAIT_OP, app_calculator_t::CALC_STATE_WAIT_VAL1, app_calculator_t::CALC_STATE_WAIT_VAL2, app_calculator_t::display, app_calculator_t::operand, app_calculator_t::operation, app_calculator_t::result, app_calculator_t::state, and wtk_basic_frame_get_custom_data().

Referenced by app_widget_launch().

static void app_calc_update_disp ( struct app_calculator_t *  calc )

static

Update calculator display with new value.

Parameters

calc	Pointer to calculator struct

References app_calculator_t::calc_regs, app_calculator_t::display, MAX_DIGITS, MAX_VALUE, MIN_VALUE, app_calculator_t::state, app_calculator_t::text, and wtk_label_change().

Referenced by app_calc_handler().

bool app_widget_launch

(

void

)

Setup widget demo.

Allocates memory for the application context, and creates all widgets that make up its interface. If memory allocation or widget creation fails, the application exits immediately.

Returns

Boolean true if the application was launched successfully, false if a memory allocation occurred.

References app_calc_handler(), BT_H, BT_POS_X, BT_POS_Y, BT_W, BT_X, BT_Y, app_calculator_t::calc_regs, app_calculator_t::CALC_STATE_WAIT_VAL1, gfx_bitmap::color, gfx_bitmap::data, app_calculator_t::display, app_calculator_t::frame, app_calculator_t::frame_bg, GFX_BITMAP_SOLID, GFX_COLOR, GFX_COLOR_WHITE, gfx_get_height(), gfx_get_width(), font::height, membag_alloc(), membag_free(), app_calculator_t::operand, app_calculator_t::operation, win_area::pos, app_calculator_t::result, win_area::size, app_calculator_t::state, sysfont, T_H, T_SP, T_W, app_calculator_t::text, app_calculator_t::text_frame, app_calculator_t::text_frame_bg, gfx_bitmap::type, W_SP, win_destroy(), win_get_root(), win_show(), wtk_basic_frame_as_child(), wtk_basic_frame_create(), wtk_button_as_child(), wtk_button_create(), wtk_label_as_child(), wtk_label_create(), win_point::x, and win_point::y.

Referenced by main().

static void calc_perform_operation ( struct app_calculator_t *  calc )

static

Perform calculation.

Parameters

calc	Pointer to calculator struct

References app_calculator_t::calc_regs, MAX_VALUE, MIN_VALUE, app_calculator_t::operand, app_calculator_t::operation, app_calculator_t::result, and app_calculator_t::state.

Referenced by app_calc_handler().