SetKeyHandler()的流程
设置按键处理的函数使用SetKeyHandler()
这个函数的大概实现如下（精简版哈）：
void SetKeyHandler(FuncPtr funcPtr,U16 keyCode,U16 keyType)
{
currKeyFuncPtrs[keyCode][keyType] = funcPtr;
}
其实就是把函数指针传递到currKeyFuncPtrs【】【】这个二维数组里。
然后exec_key_handler（）这个函数就从这个数组里面取出对应的函数指针执行。
static void exec_key_handler(mmi_key_evt_struct *evt_p)//（精简了）
{
U16 ucs2_value = 0;
U32 special_key_flag = 0;
FuncPtr curr_func_ptr;
SetkeyInfo(evt_p->cvt_code, evt_p->mmi_key_type);
if (mmi_frm_dispatch_key_event(evt_p->cvt_code, evt_p->mmi_key_type, ucs2_value, special_key_flag) == MMI_FALSE)
{
/* get the key handler */
curr_func_ptr = get_key_handler(evt_p->cvt_code, evt_p->mmi_key_type);
/* invoke the key handler */
if (curr_func_ptr)
{
(*curr_func_ptr)();
}
}
/* If finish the key up handler, we reset the current key info. */
if (evt_p->mmi_key_type == KEY_EVENT_UP)
{
SetkeyInfo(evt_p->cvt_code, MAX_KEY_TYPE);
}
}
static FuncPtr get_key_handler(S16 mmi_key_code, S16 mmi_key_type)
{
FuncPtr currFuncPtr = NULL;
S32 i;
for (i = 0; i < SPE_KEY_HDL_TBL_NUM; i++)
{
if ((currFuncPtr = (* g_key_handler[i])(mmi_key_code, mmi_key_type)) != NULL)
{
break;
}
}
return currFuncPtr;
}
const static get_func_ptr g_key_handler[] =
{
#if defined(__MMI_QWERTY_KEYPAD_SUPPORT__)
get_any_key_handler,
#endif
get_repeat_key_handler,
#ifdef __MMI_WGUI_MINI_TAB_BAR__
get_mini_tab_bar_key_handler,
#endif
#ifdef __MMI_SCREEN_SNAPSHOT__
get_screen_snapshot_key_handler,
#endif
#ifdef __LSK_KEYSEND2_IN_ONE__
/* under construction !*/
#endif
get_default_key_handler
};
get_default_key_handler 这里面就调用了currKeyFuncPtrs这个数组。流程就是这样的。
------------------------------------------------------------------------------------
void SetRightSoftkeyFunction(void (*f) (void), MMI_key_event_type k)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
register_right_softkey_handler();
set_right_softkey_function(f, k);
mmi_imc_key_setup_rsk_function(f);
}
#define register_right_softkey_handler() register_softkey_handler(MMI_RIGHT_SOFTKEY)
void register_softkey_handler(WGUI_SOFTKEY_ENUM key)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if ((MMI_softkeys[key].text == NULL) && (MMI_softkeys[key].normal_up_icon == NULL))
{
return;
}
switch (key)
{
case MMI_LEFT_SOFTKEY:
SetKeyHandler(left_softkey_down, KEY_LSK, KEY_EVENT_DOWN);
SetKeyHandler(left_softkey_up, KEY_LSK, KEY_EVENT_UP);
left_softkey_keyboard_handler_active = 1;
break;
case MMI_RIGHT_SOFTKEY:
SetKeyHandler(right_softkey_down, KEY_RSK, KEY_EVENT_DOWN);
SetKeyHandler(right_softkey_up, KEY_RSK, KEY_EVENT_UP);
right_softkey_keyboard_handler_active = 1;
break;
#ifdef __MMI_WGUI_CSK_ENABLE__
case MMI_CENTER_SOFTKEY:
SetKeyHandler(center_softkey_down, KEY_CSK, KEY_EVENT_DOWN);
SetKeyHandler(center_softkey_up, KEY_CSK, KEY_EVENT_UP);
center_softkey_keyboard_handler_active = 1;
break;
#endif /* __MMI_WGUI_CSK_ENABLE__ */
}
}
这是个按键的结构体
~~
void right_softkey_down(void)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if (!(MMI_softkeys[MMI_RIGHT_SOFTKEY].flags & UI_BUTTON_STATE_CLICKED))
{
/* change the state of RSK button */
MMI_softkeys[MMI_RIGHT_SOFTKEY].flags |= UI_BUTTON_STATE_CLICKED;
MMI_softkeys[MMI_RIGHT_SOFTKEY].flags |= UI_BUTTON_STATE_DOWN;
redraw_softkey(MMI_RIGHT_SOFTKEY);
execute_softkey_function(KEY_EVENT_DOWN, MMI_RIGHT_SOFTKEY);
}
}
void redraw_softkey(WGUI_SOFTKEY_ENUM key)
{
........
.......
gdi_layer_lock_frame_buffer();
#if defined(__PWV_UI_BLACKBERRY_STYLE__)
{
extern MMI_BOOL g_bMainmenu;
extern MMI_BOOL g_bCalculator;
extern MMI_BOOL g_bSmartDial;
if((g_bMainmenu == MMI_FALSE)&&(g_bCalculator==MMI_FALSE)&&(g_bSmartDial))
{
hide_softkey[key] ();
show_softkey(key);
}
}
#else
hide_softkey[key] ();
show_softkey(key);
#endif
gdi_layer_unlock_frame_buffer();
........
.........
}
/*
* struct of icontext button component.
*/
typedef struct _icontext_button
{
S32 x; /* Is the x position of icontext button */
S32 y; /* Is the y position of icontext button */
S32 width; /* Is the width of icontext button */
S32 height; /* Is the height of icontext button */
UI_filled_area *normal_up_filler; /* Is the background filler of icontext button in its notmal up state */
UI_filled_area *normal_down_filler; /* Is the background filler of icontext button in its notmal down state */
UI_filled_area *disabled_up_filler; /* Is the background filler of icontext button in its disabled up state */
UI_filled_area *disabled_down_filler; /* Is the background filler of icontext button in its disabled down state */
UI_filled_area *clicked_up_filler; /* Is the background filler of icontext button in its clicked up state */
UI_filled_area *clicked_down_filler; /* Is the background filler of icontext button in its clicked down state */
UI_filled_area *focussed_up_filler; /* Is the background filler of icontext button in its focussed up state */
UI_filled_area *focussed_down_filler; /* Is the background filler of icontext button in its focussed down state */
U32 flags; /* Is the flag of icontext button */
PU8 normal_up_icon; /* Is the icon of icontext button in its normal up state */
PU8 normal_down_icon; /* Is the icon of icontext button in its normal down state */
PU8 disabled_up_icon; /* Is the icon of icontext button in its disabled up state */
PU8 disabled_down_icon; /* Is the icon of icontext button in its disabled down state */
PU8 clicked_up_icon; /* Is the icon of icontext button in its clicked up state */
PU8 clicked_down_icon; /* Is the icon of icontext button in its clicked down state */
PU8 focussed_up_icon; /* Is the icon of icontext button in its focussed up state */
PU8 focussed_down_icon; /* Is the icon of icontext button in its focussed down state */
S32 icon_x; /* Is the logical x position of icon */
S32 icon_y; /* Is the logical y position of icon */
UI_transparent_color_type icon_transparent_color; /* Is icon's transparent color */
S32 text_x; /* Is the logical x position of text */
S32 text_y; /* Is the logical y position of text */
S32 text_height; /* Is the text's height of icontext button */
S32 text_width; /* Is the text's width of icontext button */
UI_string_type text; /* Is the text's content of icontext button */
color normal_up_text_color; /* Is the text's color of icontext button in its notmal up state */
color normal_down_text_color; /* Is the text's color of icontext button in its notmal down state */
color disabled_up_text_color; /* Is the text's color of icontext button in its disabled up state */
color disabled_down_text_color; /* Is the text's color of icontext button in its disabled down state */
color focussed_up_text_color; /* Is the text's color of icontext button in its focussed up state */
color focussed_down_text_color; /* Is the text's color of icontext button in its focussed down state */
color clicked_up_text_color; /* Is the text's color of icontext button in its clicked up state */
color clicked_down_text_color; /* Is the text's color of icontext button in its clicked down state */
color normal_up_text_border_color; /* Is the text border's color of icontext button in its notmal up state */
color normal_down_text_border_color; /* Is the text border's color of icontext button in its notmal down state */
color disabled_up_text_border_color; /* Is the text border's color of icontext button in its disabled up state */
color disabled_down_text_border_color; /* Is the text border's color of icontext button in its disabled down state */
color focussed_up_text_border_color; /* Is the text border's color of icontext button in its focussed up state */
color focussed_down_text_border_color; /* Is the text border's color of icontext button in its focussed down state */
color clicked_up_text_border_color; /* Is the text border's color of icontext button in its clicked up state */
color clicked_down_text_border_color; /* Is the text border's color of icontext button in its clicked down state */
UI_font_type text_font; /* Is the text's font size of icontext button */
/* Is the clear background function handler of icontext button
* SEE ALSO
* You should also know gui_button_clear_background_hdlr as well.
*/
gui_button_clear_background_hdlr clear_background_fp;
S32 touch_area_x1; /* Is the x position of touch area's left-top corner */
S32 touch_area_y1; /* Is the y position of touch area's left-top corner */
S32 touch_area_x2; /* Is the x position of touch area's right-bottom corner */
S32 touch_area_y2; /* Is the y position of touch area's right-bottom corner */
S32 display_area_x1; /* Is the x position of display area's left-top corner */
S32 display_area_y1; /* Is the y position of display area's left-top corner */
S32 display_area_x2; /* Is the x position of display area's right-bottom corner */
S32 display_area_y2; /* Is the y position of display area's right-bottom corner */
#ifdef __MMI_TOUCH_SCREEN__
/* Is text button's pen state which is supported only in touch projects */
gui_button_pen_state_struct pen_state;
/* Is a function handler which displays icontext button in its pen down state */
gui_button_draw_button_hdlr draw_down_fp;
/* Is a function handler which displays icontext button in its pen up state */
gui_button_draw_button_hdlr draw_up_fp;
#endif /* __MMI_TOUCH_SCREEN__ */
/* Is the horizontal gap between icontext button's content and its border in X direction */
S32 horizontal_gap;
} icontext_button;