/*********************************************************************
*                SEGGER MICROCONTROLLER SYSTEME GmbH                 *
*        Solutions for real time microcontroller applications        *
**********************************************************************
*                                                                    *
*        (c) 1996 - 2007  SEGGER Microcontroller Systeme GmbH        *
*                                                                    *
*        Internet: www.segger.com    Support:  support@segger.com    *
*                                                                    *
**********************************************************************

** emWin V4.14 - Graphical user interface for embedded applications **
emWin is protected by international copyright laws.   Knowledge of the
source code may not be used to write a similar product.  This file may
only be used in accordance with a license and should not be re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File        : WIDGET_EditWinmode.c
Purpose     : Demonstrates how to use a edit widget in 'windows' mode
----------------------------------------------------------------------
*/

#include <stddef.h>

#include "GUI.h"
#include "WM.h"
#include "DIALOG.h"

/*********************************************************************
*
*       Static data
*
**********************************************************************
*/
static const GUI_WIDGET_CREATE_INFO _aDialogCreate[] = {
  { FRAMEWIN_CreateIndirect, "Edit winmode", 0,         90,  90, 140, 130, FRAMEWIN_CF_MOVEABLE},
  { EDIT_CreateIndirect,     NULL,     GUI_ID_EDIT0,    10,  10, 110,  20, 0, 15},
  { EDIT_CreateIndirect,     NULL,     GUI_ID_EDIT1,    10,  40, 110,  20, 0, 15},
  { BUTTON_CreateIndirect,   "Ok",     GUI_ID_OK,       10,  80,  50,  20 },
  { BUTTON_CreateIndirect,   "Cancel", GUI_ID_CANCEL,   70,  80,  50,  20 },
};

static WM_CALLBACK * _pEditCallback;

static char * _apExplain[] = {
  {"This sample shows how to use edit widgets with a"},
  {"user defined callback function and how to set a"},
  {"user defined AddKey function. It selects the"},
  {"contents of the edit field on receiving the focus"},
  {"and overwrites the contents if a key other than"},
  {"a cursor key is pressed."},
};

/*********************************************************************
*
*       Static code
*
**********************************************************************
*/
/*********************************************************************
*
*       _cbEditAddKey
*
* Purpose:
*   This function is called by the edit widget if a character should be added to the contents of the widget.
*/
static void _cbEditAddKey(EDIT_Handle hObj, int Key) {
  char acBuffer[2] = {0};
  switch (Key) {
  case GUI_KEY_LEFT:
    EDIT_SetpfAddKeyEx(hObj, 0);                            /* Clear user defined AddKey function */
    EDIT_SetCursorAtChar(hObj, EDIT_GetNumChars(hObj) - 1); /* Set cursor if GUI_KEY_LEFT has been pressed */
    break;
  case GUI_KEY_RIGHT:
    EDIT_SetpfAddKeyEx(hObj, 0);                            /* Clear user defined AddKey function */
    EDIT_SetCursorAtChar(hObj, 1);                          /* Set cursor if GUI_KEY_RIGHT has been pressed */
    break;
  case GUI_KEY_UP:                                          /* Do not react on GUI_KEY_UP and GUI_KEY_DOWN */
  case GUI_KEY_DOWN:
    break;
  default:
    if (Key >= 0x20) {
      acBuffer[0] = (U8)Key;
      EDIT_SetpfAddKeyEx(hObj, 0);                          /* Clear user defined AddKey function */
      EDIT_SetText(hObj, acBuffer);                         /* Overwrite contents of edit widget with pressed key */
    }
  }
}

/*********************************************************************
*
*       _cbEdit
*
* Purpose:
*   New callback function of edit widgets which should work in 'windows' mode.
*/
static void _cbEdit(WM_MESSAGE * pMsg) {
  switch (pMsg->MsgId) {
  case WM_PID_STATE_CHANGED:
    if (((const WM_PID_STATE_CHANGED_INFO*)pMsg->Data.p)->State) {
      return; /* Do not call edit callback */
    }
    break;
  case WM_TOUCH:
    if (pMsg->Data.p) {  /* Something happened in our area (pressed or released) */
      const GUI_PID_STATE* pState;
      pState = (const GUI_PID_STATE*)pMsg->Data.p;
      if (pState->Pressed) {
        if (WM_GetFocussedWindow() != pMsg->hWin) {
          WM_SetFocus(pMsg->hWin);
          return; /* Do not call edit callback */
        }
      }
    }
    break;
  case WM_SET_FOCUS:
    if (pMsg->Data.v == 1) {
      EDIT_SetpfAddKeyEx(pMsg->hWin, _cbEditAddKey); /* Set function pointer for a user defined AddKey function */
      EDIT_SetSel(pMsg->hWin, 0, -1);             /* Select the whole contents of the edit field */
    }
  }
  if (_pEditCallback) {
    _pEditCallback(pMsg);
  }
}

/*********************************************************************
*
*       _cbDialog
*/
static void _cbDialog(WM_MESSAGE * pMsg) {
  int i;
  int NCode, Id;
  WM_HWIN hDlg, hItem;
  hDlg = pMsg->hWin;
  switch (pMsg->MsgId) {
  case WM_INIT_DIALOG:
    FRAMEWIN_SetFont(pMsg->hWin, &GUI_Font13_ASCII);
    FRAMEWIN_SetTextAlign(pMsg->hWin, GUI_TA_HCENTER);
    for (i = 0; i < 2; i++) {
      hItem = WM_GetDialogItem(hDlg, GUI_ID_EDIT0 + i);  /* Get the handle of the edit widget */
      if (!_pEditCallback) {
        _pEditCallback = WM_SetCallback(hItem, _cbEdit); /* Overwrite callback function and remember original function */
      } else {
        WM_SetCallback(hItem, _cbEdit);                  /* Overwrite callback function */
      }
      EDIT_SetText(hItem, "Hello world!");               /* Fill widget with text */
      EDIT_SetpfAddKeyEx(hItem, _cbEditAddKey);          /* Set function pointer for a user defined AddKey function */
      EDIT_SetSel(hItem, 0, -1);                         /* Select the whole contents of the edit field */
    }
    break;
  case WM_NOTIFY_PARENT:
    Id    = WM_GetId(pMsg->hWinSrc);      /* Id of widget */
    NCode = pMsg->Data.v;                 /* Notification code */
    switch (NCode) {
      case WM_NOTIFICATION_RELEASED:      /* React only if released */
        if (Id == GUI_ID_OK) {            /* OK Button */
          GUI_EndDialog(hDlg, 0);
        }
        if (Id == GUI_ID_CANCEL) {        /* Cancel Button */
          GUI_EndDialog(hDlg, 1);
        }
        break;
    }
    break;
  default:
    WM_DefaultProc(pMsg);
  }
}

/*********************************************************************
*
*       _cbDesktop
*
* Purpose:
*   This routine handles the drawing of the desktop window.
*/
static void _cbDesktop(WM_MESSAGE * pMsg) {
  int i;
  switch (pMsg->MsgId) {
  case WM_PAINT:
    GUI_SetBkColor(GUI_RED);
    GUI_Clear();
    GUI_SetFont(&GUI_Font24_ASCII);
    GUI_DispStringHCenterAt("WIDGET_EditWinmode", 160, 5);
    GUI_DispNextLine();
    GUI_SetFont(GUI_DEFAULT_FONT);
    GUI_DispNextLine();
    for (i = 0; i < GUI_COUNTOF(_apExplain); i++) {
      GUI_DispStringHCenterAt(_apExplain[i], 160, GUI_GetDispPosY());
      GUI_DispNextLine();
    }
    break;
  }
}

/*********************************************************************
*
*       Exported code
*
**********************************************************************
*/
/*********************************************************************
*
*       MainTask
*/
void MainTask(void) {
  int Result;
  GUI_Init();
  WM_SetCallback(WM_HBKWIN, _cbDesktop);
  while(1) {
    Result = GUI_ExecDialogBox(_aDialogCreate, GUI_COUNTOF(_aDialogCreate), &_cbDialog, 0, 0, 0);
    GUI_Delay(1000);
  }
}