RADIO - Usage (Sample)

RADIO_Usage.c
File(s) required	RADIO_Usage.c
Runs in simulation	Yes
Runs on target	Yes
Download	RADIO_Usage.c

This sample demonstrates the usage of a RADIO widget.

Code

/*********************************************************************
*                    SEGGER Microcontroller GmbH                     *
*        Solutions for real time microcontroller applications        *
**********************************************************************
*                                                                    *
*        (c) 1996 - 2020  SEGGER Microcontroller GmbH                *
*                                                                    *
*        Internet: www.segger.com    Support:  support@segger.com    *
*                                                                    *
**********************************************************************

** emWin V6.10 - 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        : RADIO_Usage.c
Purpose     : Sample that demonstrates the usage of RADIO widgets in
              emWin. The sample also shows, how multiple RADIOs can be
              combined by grouping them.
Requirements: WindowManager - (x)
              MemoryDevices - ( )
              AntiAliasing  - ( )
              VNC-Server    - ( )
              PNG-Library   - ( )
              TrueTypeFonts - ( )
---------------------------END-OF-HEADER------------------------------
*/

#include "DIALOG.h"
#include <stdio.h>

/*********************************************************************
*
*       Defines
*
**********************************************************************
*/
#define RADIO_GROUP 1

/*********************************************************************
*
*       Static data
*
**********************************************************************
*/
static const char * _acValues[] = {
  "Red",
  "Green",
  "Blue",
  "Magenta",
  "Cyan",
  "Yellow"
};

/*********************************************************************
*
*       Static code
*
**********************************************************************
*/
static void _cbWin(WM_MESSAGE * pMsg) {
  static WM_HWIN hRadio0, hRadio1;
  int            i, j;
  char           acBuffer[32];
  int            NCode, Id;
  int            Value;
  static WM_HWIN hNotify;

  switch(pMsg->MsgId) {
  case WM_CREATE:
    //
    // Create a RADIO widget.
    //
    hRadio0 = RADIO_CreateEx(10, 10, 60, 60, pMsg->hWin, WM_CF_SHOW, 0, GUI_ID_RADIO0, 3, 20);
    //
    // Add items to RADIO.
    //
    for (i = 0; i < (GUI_COUNTOF(_acValues) / 2); i++) {
      RADIO_SetText(hRadio0, *(_acValues + i), i);
    }
    //
    // Edit the widget's properties.
    //
    RADIO_SetFont(hRadio0, &GUI_Font13B_1);
    RADIO_SetTextColor(hRadio0, GUI_RED);
    //
    // Increment selection.
    //
    RADIO_Inc(hRadio0);
    //
    // Create another RADIO.
    //
    hRadio1 = RADIO_CreateEx(80, 10, 80, 60, pMsg->hWin, WM_CF_SHOW, 0, GUI_ID_RADIO0, 3, 20);
    for (j = 0; j < (GUI_COUNTOF(_acValues) / 2); j++) {
      RADIO_SetText(hRadio1, *(_acValues + i), j);
      i++;
    }
    //
    // Group both RADIOs together.
    // This way, we can only select one item from both RADIOs.
    //
    RADIO_SetGroupId(hRadio0, RADIO_GROUP);
    RADIO_SetGroupId(hRadio1, RADIO_GROUP);
    break;
  case WM_PAINT:
    GUI_SetBkColor(GUI_WHITE);
    GUI_Clear();
    GUI_SetFont(&GUI_Font13B_1);
    GUI_SetColor(GUI_BLACK);
    //
    // Process current selection.
    //
    Value = RADIO_GetValue(hNotify);
    if (Value != -1) {
      if(hNotify == hRadio1) {
        //
        // If our second radio widget was clicked, we need to add an offset to the value,
        // so we access the correct string.
        //
        Value += 3;
      }
      sprintf(acBuffer, "Current selection: %s", *(_acValues + Value));
      GUI_DispStringAt(acBuffer, 10, 80);
    }
    break;
  case WM_NOTIFY_PARENT:
    //
    // Get Id of sender window and notification code.
    //
    Id    = WM_GetId(pMsg->hWinSrc);
    NCode = pMsg->Data.v;
    switch (Id) {
    case GUI_ID_RADIO0:
    case GUI_ID_RADIO1:
      switch(NCode) {
      case WM_NOTIFICATION_VALUE_CHANGED:
        //
        // Save the RADIO widget that was clicked, so we can process it later.
        //
        hNotify = pMsg->hWinSrc;
        //
        // Redraw the parent window when the RADIO's selection has changed.
        //
        WM_InvalidateWindow(pMsg->hWin);
        break;
      }
      break;
    }
    break;
  default:
    WM_DefaultProc(pMsg);
  }
}

/*********************************************************************
*
*       Public code
*
**********************************************************************
*/
/*********************************************************************
*
*       MainTask
*/
void MainTask(void) {
  //
  // Init emWin.
  //
  GUI_Init();
  //
  // Create parent window for RADIO.
  //
  WM_CreateWindowAsChild(0, 0, LCD_GetXSize(), LCD_GetYSize(), WM_HBKWIN, WM_CF_SHOW, _cbWin, 0);

  while (1) {
    GUI_Delay(100);
  }
}

/*************************** End of file ****************************/