BUTTON - Usage (Sample)

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

This sample demonstrates how to use a BUTTON 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        : BUTTON_Usage.c
Purpose     : Sample that demonstrates the usage of a BUTTON widget.
Requirements: WindowManager - (x)
              MemoryDevices - ( )
              AntiAliasing  - ( )
              VNC-Server    - ( )
              PNG-Library   - ( )
              TrueTypeFonts - ( )
---------------------------END-OF-HEADER------------------------------
*/

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

/*********************************************************************
*
*       Defines
*
**********************************************************************
*/
#define ID_BUTTON  1

/*********************************************************************
*
*       Static data
*
**********************************************************************
*/

/*********************************************************************
*
*       Static code
*
**********************************************************************
*/
static void _cbWin(WM_MESSAGE * pMsg) {
  int           Id, NCode;
  static int    Clicked, Released;
  BUTTON_Handle hButton;
  char          acBuffer[64];

  switch(pMsg->MsgId) {
  case WM_CREATE:
    //
    // Create a button as child of this window.
    //
    hButton = BUTTON_CreateEx(10, 10, 80, 20, pMsg->hWin, WM_CF_SHOW, 0, ID_BUTTON);
    BUTTON_SetText(hButton, "Click me");
    break;
  case WM_PAINT:
    GUI_SetBkColor(GUI_WHITE);
    GUI_Clear();
    GUI_SetColor(GUI_BLACK);
    if(Clicked) {
      sprintf(acBuffer, "Button was clicked at: %d.", Clicked);
      GUI_DispStringAt(acBuffer, 10, 40);
    }
    if(Released) {
      sprintf(acBuffer, "Button was released at: %d.", Released);
      GUI_DispStringAt(acBuffer, 10, 60);
    }
    break;
  case WM_NOTIFY_PARENT:
    //
    // Since the button is a child of this window, reacts on the button
    // are sent to its parent window.
    //
    Id    = WM_GetId(pMsg->hWinSrc);
    NCode = pMsg->Data.v;
    //
    // Check if notification was sent from the button.
    //
    switch(Id) {
    case ID_BUTTON:
      //
      // Check for the correct notification code.
      //
      switch(NCode) {
      case WM_NOTIFICATION_CLICKED:
        Clicked = GUI_GetTime();
        WM_InvalidateWindow(pMsg->hWin);
        break;
      case WM_NOTIFICATION_RELEASED:
        Released = GUI_GetTime();
        WM_InvalidateWindow(pMsg->hWin);
        break;
      }
      break;
    }
    break;
  default:
    WM_DefaultProc(pMsg);
  }
}

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

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

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